The paper presents the results of studies on the processing of copper-lead mattes with high-sulfur copper concentrate in a converter. The effect of high-sulfur copper concentrate on the quality of converting products is shown. Based on the obtained results, a comparative analysis of the technological indicators of the 1st period of converting copper-lead mattes according to the existing technology and in the joint processing of copper-lead mattes with copper concentrate was carried out. It has been established that when the high-sulfur copper concentrate is used as a sulfidizing agent, excess sulfur released as a result of the dissociation of higher sulfides is completely absorbed by the slag melt. It is shown that elemental sulfur, interacting with oxides of non-ferrous metals and impurities, has a significant effect on the equilibrium distribution of metals between the converting products and their extraction into targeted products. The influence of sulfur on the destruction of magnetite in the process of converting was also established. New data on the distribution of non-ferrous and associated metal impurities (As, Sb, etc.) were obtained during the conversion of copper-lead mattes with high-sulfur copper concentrate. High values were established for the extraction of non-ferrous metals and impurities into targeted products: copper into matte - up to 98%, lead, zinc, arsenic, and antimony into dust - 87%, 91%, 84%, and 38%, respectively. The possibility of a significant improvement in technical and economic indicators, the quality of converting products, and environmental protection during the joint smelting of high-sulfur copper concentrate with a copper-lead matte are shown. The developed technology for converting copper-lead mattes, with high-sulfur copper concentrate, is easily integrated into the plant structure of Kazzinc LLP without any special material costs.
{"title":"Improving the quality of converting products by the joint smelting of high-sulfur copper concentrate with copper-lead matte","authors":"A. Argyn, E. Zoldasbay, N. Dosmukhamedov","doi":"10.31643/2024/6445.06","DOIUrl":"https://doi.org/10.31643/2024/6445.06","url":null,"abstract":"The paper presents the results of studies on the processing of copper-lead mattes with high-sulfur copper concentrate in a converter. The effect of high-sulfur copper concentrate on the quality of converting products is shown. Based on the obtained results, a comparative analysis of the technological indicators of the 1st period of converting copper-lead mattes according to the existing technology and in the joint processing of copper-lead mattes with copper concentrate was carried out. It has been established that when the high-sulfur copper concentrate is used as a sulfidizing agent, excess sulfur released as a result of the dissociation of higher sulfides is completely absorbed by the slag melt. It is shown that elemental sulfur, interacting with oxides of non-ferrous metals and impurities, has a significant effect on the equilibrium distribution of metals between the converting products and their extraction into targeted products. The influence of sulfur on the destruction of magnetite in the process of converting was also established. New data on the distribution of non-ferrous and associated metal impurities (As, Sb, etc.) were obtained during the conversion of copper-lead mattes with high-sulfur copper concentrate. High values were established for the extraction of non-ferrous metals and impurities into targeted products: copper into matte - up to 98%, lead, zinc, arsenic, and antimony into dust - 87%, 91%, 84%, and 38%, respectively. The possibility of a significant improvement in technical and economic indicators, the quality of converting products, and environmental protection during the joint smelting of high-sulfur copper concentrate with a copper-lead matte are shown. The developed technology for converting copper-lead mattes, with high-sulfur copper concentrate, is easily integrated into the plant structure of Kazzinc LLP without any special material costs.","PeriodicalId":29905,"journal":{"name":"Kompleksnoe Ispolzovanie Mineralnogo Syra","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47728650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Nurbаyеvа, R. Lukpаnov, L. Аruovа, M. Gunаsеkаrаn
Thе sаmplеs of fibеr concrеtе with diffеrеnt lеngths of bаsаlt fibеr hаvе bееn tеstеd. Thе chаrаctеristics of bаsаlt fibеr usеd for thе mаnufаcturе of fibеr concrеtе аrе givеn. Thе аim of thе study is to idеntify thе pаttеrn of influеncе of fibеr lеngth on thе strеngth chаrаctеristics of fibеr concrеtе. Thе pаpеr prеsеnts thе rеsults of dеtеrmining thе comprеssivе аnd bеnding tеnsilе strеngth of finе-grаinеd fibеr concrеtе with no fibеr аddеd (control composition) аnd with thе аddition of bаsаlt fibеr 0.2 % of thе wеight of cеmеnt with а fibеr lеngth of 40 mm, 20 mm, 10 mm аnd 5 mm. It is dеmonstrаtеd thаt thе optimаl limits of bаsаlt fibеr introduction into thе mixturе of finе-grаinеd concrеtе cаn bе considеrеd а lеngth of 20 mm fibеrs, which lеаds to аn incrеаsе in comprеssivе strеngth up to 47.2 %, in bеnding tеnsilе strеngth up to 2 timеs morе in compаrison with thе control composition.
{"title":"Influеncе of bаsаlt fibеr lеngth on strеngth chаrаctеristics of finе-grаinеd fibеr concrеtе","authors":"M. Nurbаyеvа, R. Lukpаnov, L. Аruovа, M. Gunаsеkаrаn","doi":"10.31643/2024/6445.02","DOIUrl":"https://doi.org/10.31643/2024/6445.02","url":null,"abstract":"Thе sаmplеs of fibеr concrеtе with diffеrеnt lеngths of bаsаlt fibеr hаvе bееn tеstеd. Thе chаrаctеristics of bаsаlt fibеr usеd for thе mаnufаcturе of fibеr concrеtе аrе givеn. Thе аim of thе study is to idеntify thе pаttеrn of influеncе of fibеr lеngth on thе strеngth chаrаctеristics of fibеr concrеtе. Thе pаpеr prеsеnts thе rеsults of dеtеrmining thе comprеssivе аnd bеnding tеnsilе strеngth of finе-grаinеd fibеr concrеtе with no fibеr аddеd (control composition) аnd with thе аddition of bаsаlt fibеr 0.2 % of thе wеight of cеmеnt with а fibеr lеngth of 40 mm, 20 mm, 10 mm аnd 5 mm. It is dеmonstrаtеd thаt thе optimаl limits of bаsаlt fibеr introduction into thе mixturе of finе-grаinеd concrеtе cаn bе considеrеd а lеngth of 20 mm fibеrs, which lеаds to аn incrеаsе in comprеssivе strеngth up to 47.2 %, in bеnding tеnsilе strеngth up to 2 timеs morе in compаrison with thе control composition.","PeriodicalId":29905,"journal":{"name":"Kompleksnoe Ispolzovanie Mineralnogo Syra","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69368413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This article presents a mathematical model in the form of static equations of dependencies of input and output flows based on the equations of material and heat balance for the purposes of operational planning and control of the complex technological complex of Vanyukov melting (PV). Dynamic characteristics are presented for the purpose of controlling the thermal regime based on the technology of the developed melting process with blowing from below. As a result of the study, the developed mathematical model for controlling the smelting process when calculating the material flows of the charge will allow tracking changes in the thermal state of the smelting (by the copper content in the matte). This model can quite well describe the dynamics of the state of the process, both when establishing the impacts aimed at increasing the heating of the furnace, and at reducing its heating. Based on the equations, a computer model based on the dynamic programming method in the MATLAB software package has been developed. The scientific novelty lies in the fact that for the first time, the structure of a mathematical model has been developed that describes the processes occurring in the over-tuyere zone and the sludge zone of the smelting products.
{"title":"Development of a mathematical model for a compound technological complex of vanyukov melting in order to control the material and thermal regime","authors":"N. Mussabekov, B. Mukhanov","doi":"10.31643/2023/6445.35","DOIUrl":"https://doi.org/10.31643/2023/6445.35","url":null,"abstract":"This article presents a mathematical model in the form of static equations of dependencies of input and output flows based on the equations of material and heat balance for the purposes of operational planning and control of the complex technological complex of Vanyukov melting (PV). Dynamic characteristics are presented for the purpose of controlling the thermal regime based on the technology of the developed melting process with blowing from below. As a result of the study, the developed mathematical model for controlling the smelting process when calculating the material flows of the charge will allow tracking changes in the thermal state of the smelting (by the copper content in the matte). This model can quite well describe the dynamics of the state of the process, both when establishing the impacts aimed at increasing the heating of the furnace, and at reducing its heating. Based on the equations, a computer model based on the dynamic programming method in the MATLAB software package has been developed. The scientific novelty lies in the fact that for the first time, the structure of a mathematical model has been developed that describes the processes occurring in the over-tuyere zone and the sludge zone of the smelting products.","PeriodicalId":29905,"journal":{"name":"Kompleksnoe Ispolzovanie Mineralnogo Syra","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69368297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Baisanov, N. Vorobkalo, Y. Makhambetov, Y. Mynzhasar, Z. Zulhan
The object of study in this work is microsilica. Microsilica is a pulverized technogenic waste generated during the smelting of technical silicon in industries. The intended use of this material is to obtain the highest quality grades of technical silicon in the end result without the use of expensive quartz. Microsilica is a finely dispersed powder, the direct processing (without preliminary preparation) of which into technical silicon is impossible in ore-thermal furnaces. That requires the manufacture of high-strength briquettes based on it, meeting all the requirements for raw materials for ore-thermal furnaces. In this paper, the authors present the results of a study of the thermal stability of microsilica-based briquettes in order to optimize the physicochemical properties of the resulting briquettes. The tested microsilica briquettes with various carbonaceous reducing agents (screenings of coke of thermo-oxidative coking, screenings of charcoal, etc.) were obtained on a large-scale laboratory roller briquetting press ZZXM-4. The evaluation of the thermal stability of the briquettes was carried out according to the method in which the resulting briquettes are subjected to thermal shock followed by abrasion on a special drum. The thermal resistance of a briquette is defined as the ratio of the weight of the main body of the briquette after the abrasion test to the sum of the weight of the main body and the crumbled material. The dependence of thermal stability on the granulometric composition of briquettes was also determined. The optimal granulometric composition was determined, with which the briquettes have satisfactory thermal stability. Thus, the most technologically advanced granulometric composition of the briquetting charge for reduction smelting in an ore-thermal furnace was established. It is best to use briquettes with granulometric compositions of the appropriate ratio of fractions 0-1; 1-3; 3-5 mm with the following proportions 35/35/30 and 60/20/15, as well as briquettes with particle size distribution within these ranges of variation.
{"title":"Studies of the thermal stability of briquettes based on microsilica","authors":"A. Baisanov, N. Vorobkalo, Y. Makhambetov, Y. Mynzhasar, Z. Zulhan","doi":"10.31643/2023/6445.40","DOIUrl":"https://doi.org/10.31643/2023/6445.40","url":null,"abstract":"The object of study in this work is microsilica. Microsilica is a pulverized technogenic waste generated during the smelting of technical silicon in industries. The intended use of this material is to obtain the highest quality grades of technical silicon in the end result without the use of expensive quartz. Microsilica is a finely dispersed powder, the direct processing (without preliminary preparation) of which into technical silicon is impossible in ore-thermal furnaces. That requires the manufacture of high-strength briquettes based on it, meeting all the requirements for raw materials for ore-thermal furnaces. In this paper, the authors present the results of a study of the thermal stability of microsilica-based briquettes in order to optimize the physicochemical properties of the resulting briquettes. The tested microsilica briquettes with various carbonaceous reducing agents (screenings of coke of thermo-oxidative coking, screenings of charcoal, etc.) were obtained on a large-scale laboratory roller briquetting press ZZXM-4. The evaluation of the thermal stability of the briquettes was carried out according to the method in which the resulting briquettes are subjected to thermal shock followed by abrasion on a special drum. The thermal resistance of a briquette is defined as the ratio of the weight of the main body of the briquette after the abrasion test to the sum of the weight of the main body and the crumbled material. The dependence of thermal stability on the granulometric composition of briquettes was also determined. The optimal granulometric composition was determined, with which the briquettes have satisfactory thermal stability. Thus, the most technologically advanced granulometric composition of the briquetting charge for reduction smelting in an ore-thermal furnace was established. It is best to use briquettes with granulometric compositions of the appropriate ratio of fractions 0-1; 1-3; 3-5 mm with the following proportions 35/35/30 and 60/20/15, as well as briquettes with particle size distribution within these ranges of variation.","PeriodicalId":29905,"journal":{"name":"Kompleksnoe Ispolzovanie Mineralnogo Syra","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48216117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. Ablakatov, M. Ismailov, L. M. Mustafa, A. Sanin
This article is devoted to the study of the initial phase of obtaining alloy 1420, namely, obtaining a primary material with the desired chemical composition. The effect of alloying magnesium, zirconium and lithium on the strength properties of the material. In the work, the following materials were used to obtain a cast aluminum alloy of the Al-Mg-Zr-Li system: aluminum of technical purity A0 or A5, magnesium Mg95, lithium LE-1, zirconium E100, aluminum-zirconium ligature AlZr5, aluminum-lithium ligature AlLi10. Two methods were used to introduce zirconium into the liquid Al-Mg alloy: the introduction of pure zirconium and the introduction of zirconium in the form of a ligature. Two methods were used to introduce lithium into the Al-Mg-Zr liquid alloy: the introduction of lithium in the form of a ligature and the introduction of pure lithium. Cast alloys of the Al-Mg-Zr-Li system with the following characteristics were obtained: chemical composition: Al-92.245%, Mg-5.00%, Zr-0.105%, Li-2.21%, Si-0.238%, impurities-0.202%. Mechanical properties: Brinell hardness 85 HB, microhardness 139 MPa, compressive strength 149.6 MPa, elastic modulus 12 GPa, compressive yield strength 175.2 MPa and plastic deformation modulus 0.83 GPa.
{"title":"Investigation of the Technology of Introducing Li, Mg and Zr Alloys into Aluminum Alloy","authors":"I. Ablakatov, M. Ismailov, L. M. Mustafa, A. Sanin","doi":"10.31643/2023/6445.37","DOIUrl":"https://doi.org/10.31643/2023/6445.37","url":null,"abstract":"This article is devoted to the study of the initial phase of obtaining alloy 1420, namely, obtaining a primary material with the desired chemical composition. The effect of alloying magnesium, zirconium and lithium on the strength properties of the material. In the work, the following materials were used to obtain a cast aluminum alloy of the Al-Mg-Zr-Li system: aluminum of technical purity A0 or A5, magnesium Mg95, lithium LE-1, zirconium E100, aluminum-zirconium ligature AlZr5, aluminum-lithium ligature AlLi10. Two methods were used to introduce zirconium into the liquid Al-Mg alloy: the introduction of pure zirconium and the introduction of zirconium in the form of a ligature. Two methods were used to introduce lithium into the Al-Mg-Zr liquid alloy: the introduction of lithium in the form of a ligature and the introduction of pure lithium. Cast alloys of the Al-Mg-Zr-Li system with the following characteristics were obtained: chemical composition: Al-92.245%, Mg-5.00%, Zr-0.105%, Li-2.21%, Si-0.238%, impurities-0.202%. Mechanical properties: Brinell hardness 85 HB, microhardness 139 MPa, compressive strength 149.6 MPa, elastic modulus 12 GPa, compressive yield strength 175.2 MPa and plastic deformation modulus 0.83 GPa.","PeriodicalId":29905,"journal":{"name":"Kompleksnoe Ispolzovanie Mineralnogo Syra","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69368311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This article studies optimization of open pit mining using mining and geological information systems and technologies. The aim of the study is to develop an algorithm of optimizing the contour of an open pit using a mining and geological information system. The Lerch-Grossman algorithm has been applied using the Whittle program. Justification for changing the contour of an open pit based on the opening scheme, geometric characteristics and special technical and economic parameters of the blocks has been proposed. This proposal provides increasing the production efficiency and reducing capital and operating costs during the development of the deposit. The authors have come to the conclusion that the functionality of updated mining and geological information systems helps to take into account market conditions when designing the main parameters of an open pit and to make the right decision at the stage of preparing a deposit for development and while optimizing the existing open pit contour.
{"title":"Optimizing the contours of open pit mining with the use of mining and geological information systems and technologies","authors":"S. Tyo, Sh.B. Zeitinova","doi":"10.31643/2023/6445.39","DOIUrl":"https://doi.org/10.31643/2023/6445.39","url":null,"abstract":"This article studies optimization of open pit mining using mining and geological information systems and technologies. The aim of the study is to develop an algorithm of optimizing the contour of an open pit using a mining and geological information system. The Lerch-Grossman algorithm has been applied using the Whittle program. Justification for changing the contour of an open pit based on the opening scheme, geometric characteristics and special technical and economic parameters of the blocks has been proposed. This proposal provides increasing the production efficiency and reducing capital and operating costs during the development of the deposit. The authors have come to the conclusion that the functionality of updated mining and geological information systems helps to take into account market conditions when designing the main parameters of an open pit and to make the right decision at the stage of preparing a deposit for development and while optimizing the existing open pit contour.","PeriodicalId":29905,"journal":{"name":"Kompleksnoe Ispolzovanie Mineralnogo Syra","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47025623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Muradova, E. Negim, A. Makhmetova, D. Ainakulova, N. Mohamad
Corrosion protection coating is one of the most common ways of protecting structures against all kinds of negative external influences. Various types of anti-corrosion coatings can be used to successfully extend the service life of products. However, conventional paints are not water-resistant coatings, and small cracks always appear over time due to temperature fluctuations. Compared to other types of coatings, acrylic coatings are less expensive and just as durable. Acrylic resins have high anti-corrosion properties as well as water resistance, impact resistance, good adhesion to the substrate and overall durability. This powerful combination of cost and performance makes acrylic coatings such a popular and sensible solution for protecting structures against corrosion. The main purpose of this review is to describe the different types of acrylic resins and compare their properties, synthesis and drawbacks. It is expected that this work will be the cornerstone for the future development of acrylic resins.
{"title":"An Overview of the Current State and the Advantages of using acrylic resins as anticorrosive coatings","authors":"S. Muradova, E. Negim, A. Makhmetova, D. Ainakulova, N. Mohamad","doi":"10.31643/2023/6445.44","DOIUrl":"https://doi.org/10.31643/2023/6445.44","url":null,"abstract":"Corrosion protection coating is one of the most common ways of protecting structures against all kinds of negative external influences. Various types of anti-corrosion coatings can be used to successfully extend the service life of products. However, conventional paints are not water-resistant coatings, and small cracks always appear over time due to temperature fluctuations. Compared to other types of coatings, acrylic coatings are less expensive and just as durable. Acrylic resins have high anti-corrosion properties as well as water resistance, impact resistance, good adhesion to the substrate and overall durability. This powerful combination of cost and performance makes acrylic coatings such a popular and sensible solution for protecting structures against corrosion. The main purpose of this review is to describe the different types of acrylic resins and compare their properties, synthesis and drawbacks. It is expected that this work will be the cornerstone for the future development of acrylic resins.","PeriodicalId":29905,"journal":{"name":"Kompleksnoe Ispolzovanie Mineralnogo Syra","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49388798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M.Y. Andirov, Zh.Zh. Assan, S. Nopembri, A. Seilkhan, D.E. Myrzakhmetov
Text classification is a process that includes stages and approaches for the effective classification of texts that are diverse in their structure. In this article, machine learning algorithms are implemented, such as the support vector method, logistic regression, and the k nearest neighborhood method for classifying texts collected from emergency news sites in Almaty. During the experiment, a special role was played by the data collection stage, as well as their subsequent processing. Prior to the classification of the data set, preliminary data processing was performed, which includes such steps as the removal of stop words, tokenization, stemming, lemmatization, feature extraction, and the construction of feature vectors. The data was obtained by automated collection of information from open sources using a script. Experimental results show that the classifier based on logistic regression provides the best performance results compared to other types of algorithms. The performance indicators of each algorithm were obtained, which allows us to perform a comparative analysis between them.
{"title":"Classification of texts on emergency situations in Almaty","authors":"M.Y. Andirov, Zh.Zh. Assan, S. Nopembri, A. Seilkhan, D.E. Myrzakhmetov","doi":"10.31643/2023/6445.36","DOIUrl":"https://doi.org/10.31643/2023/6445.36","url":null,"abstract":"Text classification is a process that includes stages and approaches for the effective classification of texts that are diverse in their structure. In this article, machine learning algorithms are implemented, such as the support vector method, logistic regression, and the k nearest neighborhood method for classifying texts collected from emergency news sites in Almaty. During the experiment, a special role was played by the data collection stage, as well as their subsequent processing. Prior to the classification of the data set, preliminary data processing was performed, which includes such steps as the removal of stop words, tokenization, stemming, lemmatization, feature extraction, and the construction of feature vectors. The data was obtained by automated collection of information from open sources using a script. Experimental results show that the classifier based on logistic regression provides the best performance results compared to other types of algorithms. The performance indicators of each algorithm were obtained, which allows us to perform a comparative analysis between them.","PeriodicalId":29905,"journal":{"name":"Kompleksnoe Ispolzovanie Mineralnogo Syra","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69368303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Akylbekov Ye, Ye, Yergaliuly, Shevko Viktor Mikhailovich, Aitkulov Dosmurat, Kyzylbievich, Karatayeva Gulnara
The article presents the results of an experimental study on the processing of wastes from chrysotile-asbestos production at Kostanay Minerals JSC. An electrothermal technology for the extraction of magnesium and siliceous ferroalloy from the chrysotile-asbestos wastes is proposed. The influence of the amount of coke and steel shavings on the technological parameters of the obtained alloys is determined. The results of derivatographic and SEM analyses of the chrysotile-asbestos waste samples are presented. The studies included planning experiments using the second-order rotatable designs (Box-Hunter plans), graphical optimization of technological parameters, and electric melting of a charge in a graphite crucible using a single-electrode arc furnace. Adequate regression equations were obtained explaining the effect of the amount of coke and steel shavings added to the chrysotile-asbestos waste on the extraction degree of silicon into the alloy and the silicon concentration in the alloy. By the electric melting of the charge, high-quality FS25 grade ferrosilicon with a silicon content of 24.4-29.2% and FS45 grade ferrosilicon with a silicon content of 41.6-45% were obtained. It was established that FS45 grade ferrosilicon with the extraction degree of silicon into the alloy from 75 to 85.4% is formed in the presence of 33.6-38% of coke and 16-20.8% of steel shavings. FS25 grade ferrosilicon is formed in the presence of 30-38% of coke and 29.4-40% of steel shavings; the extraction degree of silicon is 68.6-73.8%.
{"title":"Electrothermal processing of chrysotile-asbestos wastes with production of ferroalloy and extraction of magnesium into the gas phase","authors":"Akylbekov Ye, Ye, Yergaliuly, Shevko Viktor Mikhailovich, Aitkulov Dosmurat, Kyzylbievich, Karatayeva Gulnara","doi":"10.31643/2023/6445.42","DOIUrl":"https://doi.org/10.31643/2023/6445.42","url":null,"abstract":"The article presents the results of an experimental study on the processing of wastes from chrysotile-asbestos production at Kostanay Minerals JSC. An electrothermal technology for the extraction of magnesium and siliceous ferroalloy from the chrysotile-asbestos wastes is proposed. The influence of the amount of coke and steel shavings on the technological parameters of the obtained alloys is determined. The results of derivatographic and SEM analyses of the chrysotile-asbestos waste samples are presented. The studies included planning experiments using the second-order rotatable designs (Box-Hunter plans), graphical optimization of technological parameters, and electric melting of a charge in a graphite crucible using a single-electrode arc furnace. Adequate regression equations were obtained explaining the effect of the amount of coke and steel shavings added to the chrysotile-asbestos waste on the extraction degree of silicon into the alloy and the silicon concentration in the alloy. By the electric melting of the charge, high-quality FS25 grade ferrosilicon with a silicon content of 24.4-29.2% and FS45 grade ferrosilicon with a silicon content of 41.6-45% were obtained. It was established that FS45 grade ferrosilicon with the extraction degree of silicon into the alloy from 75 to 85.4% is formed in the presence of 33.6-38% of coke and 16-20.8% of steel shavings. FS25 grade ferrosilicon is formed in the presence of 30-38% of coke and 29.4-40% of steel shavings; the extraction degree of silicon is 68.6-73.8%.","PeriodicalId":29905,"journal":{"name":"Kompleksnoe Ispolzovanie Mineralnogo Syra","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69368361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Altynbekova, R. Lukpanov, D. Dyussembinov, A. Askerbekova, M. Gunasekaran
The article presents the third stage of the study results of a complex modified additive (CMA), in the accuracy of the influence of the variable ingredients of CMA on the strength of cement. This article shows the methodology of making samples, the selection of additive composition at different percentages of components, and the analysis of the strength behavior of the obtained results. To evaluate the changes in strength, samples were made and tested in compression and bending at 7, 14, and 28 days of normal-moist hardening. The results of the experiment showed that the addition of plasticizers (PAB) reduces the quantity of water - 35%, by increasing the strength of concrete by 20%. Compressive and bending strength results of the modified samples showed the best results, which were in the range of 42.80-63.66 MPa and 3.34-8.75 MPa, compared with the control composition. From the results of the research, the additive accelerates hardening and it was found that the additive contributes to the growth of strength, both at an early age and at the design age (28 days). The results of the experiment showed that from the standpoint of improving the qualitative characteristics of the samples, the use of plasticizers is appropriate. The use of CMA in the composition of concrete increases the strength, and therefore developed by the authors of CMA changes the structure of concrete and most importantly, increases the physical and mechanical characteristics of concrete.
{"title":"Effect of a complex modified additive based on post-alcohol bard on the strength behavior of concrete","authors":"A. Altynbekova, R. Lukpanov, D. Dyussembinov, A. Askerbekova, M. Gunasekaran","doi":"10.31643/2023/6445.34","DOIUrl":"https://doi.org/10.31643/2023/6445.34","url":null,"abstract":"The article presents the third stage of the study results of a complex modified additive (CMA), in the accuracy of the influence of the variable ingredients of CMA on the strength of cement. This article shows the methodology of making samples, the selection of additive composition at different percentages of components, and the analysis of the strength behavior of the obtained results. To evaluate the changes in strength, samples were made and tested in compression and bending at 7, 14, and 28 days of normal-moist hardening. The results of the experiment showed that the addition of plasticizers (PAB) reduces the quantity of water - 35%, by increasing the strength of concrete by 20%. Compressive and bending strength results of the modified samples showed the best results, which were in the range of 42.80-63.66 MPa and 3.34-8.75 MPa, compared with the control composition. From the results of the research, the additive accelerates hardening and it was found that the additive contributes to the growth of strength, both at an early age and at the design age (28 days). The results of the experiment showed that from the standpoint of improving the qualitative characteristics of the samples, the use of plasticizers is appropriate. The use of CMA in the composition of concrete increases the strength, and therefore developed by the authors of CMA changes the structure of concrete and most importantly, increases the physical and mechanical characteristics of concrete.","PeriodicalId":29905,"journal":{"name":"Kompleksnoe Ispolzovanie Mineralnogo Syra","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69367221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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