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Influеncе of bаsаlt fibеr lеngth on strеngth chаrаctеristics of finе-grаinеd fibеr concrеtе 数据库数据库数据库长度对数据库数据库数据库强度的影响
IF 0.7 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-07-05 DOI: 10.31643/2024/6445.02
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.
(2)与不同长度的(b)、(b)、(b)、(b)、(b)、(b)、(b)、(b)、(b)、(b)、(b)、(b)、(b)、(b)、(b)、(1)基于bdb数据库数据库用户数据库的数据库数据库数据库的数据库数据库,用于数据库数据库数据库数据库的数据库数据库。本研究的主要目的是确定纤维长度对纤维强度的影响规律。对无纤维(对照成分)和添加粗纤维(粗纤维长度分别为40mm、20mm、10mm和5mm)的粗纤维(粗纤维占粗纤维长度的0.2%)的压缩强度和匹配强度进行了研究。研究结果表明,在混合料中引入百仕达纤维的最佳极限是考虑到20毫米纤维长度的百仕达纤维,其压缩强度可达47.2%,与对照组合料相比,百仕达纤维强度可达2倍。
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引用次数: 0
Improving the quality of converting products by the joint smelting of high-sulfur copper concentrate with copper-lead matte 高硫铜精矿与铜铅锍联合冶炼提高转炉产品质量
IF 0.7 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-07-05 DOI: 10.31643/2024/6445.06
A. Argyn, E. Zoldasbay, N. Dosmukhamedov
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.
本文介绍了用高硫铜精矿在转炉中加工铜铅锍的研究结果。介绍了高硫铜精矿对转炉产品质量的影响。在此基础上,对按现有工艺转化铜铅砂一期工艺指标与铜精矿联合处理铜铅砂一期工艺指标进行了对比分析。用高硫铜精矿作硫化剂时,由于高硫解离而释放的多余硫被熔渣完全吸收。结果表明,单质硫与有色金属氧化物和杂质相互作用,对金属在转化产物和萃取产物之间的平衡分布有显著影响。确定了硫对磁铁矿转化过程中破坏的影响。获得了高硫铜精矿转化铜铅锍过程中有色金属及其伴生金属杂质(As、Sb等)分布的新数据。建立了有色金属和杂质从目标产品中提取的高值:铜从哑光中提取高达98%,铅,锌,砷和锑从粉尘中提取分别为87%,91%,84%和38%。指出了高硫铜精矿与铜铅锍联合冶炼在技术经济指标、转炉产品质量和环境保护等方面有显著改善的可能性。开发的高硫铜精矿铜铅锍转化技术,可轻松集成到Kazzinc LLP的工厂结构中,无需任何特殊材料成本。
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引用次数: 1
Development of a mathematical model for a compound technological complex of vanyukov melting in order to control the material and thermal regime 为了控制材料和热状态,建立了万尤科夫熔炼复合工艺的数学模型
IF 0.7 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-04-30 DOI: 10.31643/2023/6445.35
N. Mussabekov, B. Mukhanov
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.
本文在物质平衡和热平衡方程的基础上,提出了一个输入和输出流依赖关系的静态方程形式的数学模型,用于万尤科夫熔炼(PV)复杂工艺综合体的操作规划和控制。基于开发的下吹熔炼工艺技术,给出了动态特性,以控制热态。研究的结果是,在计算炉料的物质流动时,所开发的用于控制冶炼过程的数学模型将允许跟踪冶炼热状态的变化(通过亚铜中的铜含量)。该模型可以很好地描述过程状态的动态,既可以建立旨在增加炉子加热的影响,也可以降低炉子加热的影响。在此基础上,在MATLAB软件包中建立了基于动态规划方法的计算机模型。科学的新颖性在于,第一次建立了一个数学模型的结构,描述了冶炼产品的过风口区和污泥区发生的过程。
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引用次数: 0
Investigation of the Technology of Introducing Li, Mg and Zr Alloys into Aluminum Alloy 在铝合金中引入Li、Mg、Zr合金的工艺研究
IF 0.7 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-04-30 DOI: 10.31643/2023/6445.37
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.
本文致力于研究获得1420合金的初始阶段,即获得具有所需化学成分的原始材料。合金化镁、锆、锂对材料强度性能的影响。本文采用以下材料制备了Al-Mg-Zr-Li体系的铸铝合金:技术纯度为A0或A5的铝、镁Mg95、锂LE-1、锆E100、铝-锆结扎剂AlZr5、铝-锂结扎剂AlLi10。采用两种方法将锆引入液态铝镁合金:纯锆引入和以结扎形式引入锆。将锂引入Al-Mg-Zr液态合金的方法有两种:以结扎形式引入锂和纯锂引入。获得了Al-Mg-Zr-Li系铸造合金,化学成分:Al-92.245%, Mg-5.00%, Zr-0.105%, Li-2.21%, Si-0.238%,杂质-0.202%。力学性能:布氏硬度85 HB,显微硬度139 MPa,抗压强度149.6 MPa,弹性模量12 GPa,抗压屈服强度175.2 MPa,塑性变形模量0.83 GPa。
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引用次数: 0
Studies of the thermal stability of briquettes based on microsilica 微硅基型煤热稳定性研究
IF 0.7 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-04-30 DOI: 10.31643/2023/6445.40
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.
本工作的研究对象是微二氧化硅。微二氧化硅是工业上技术硅冶炼过程中产生的一种粉末状工业废料。这种材料的预期用途是在不使用昂贵的石英的情况下获得最高质量等级的技术硅。微二氧化硅是一种精细分散的粉末,在矿热炉中不可能将其直接加工(未经预先制备)成技术硅。这就要求在此基础上制造高强度型煤,满足矿热炉对原料的所有要求。本文介绍了微硅基型煤的热稳定性研究结果,以优化所制型煤的理化性能。在zxm -4型大型实验室滚柱压块机上制备了不同碳质还原剂(热氧化焦炭筛分、木炭筛分等)的微硅型煤。对成型煤的热稳定性进行了评价,所得到的成型煤在一个特殊的鼓上进行了热冲击和磨损。型煤的热阻定义为磨耗试验后的型煤主体重量与主体重量与破碎物料重量之和之比。热稳定性与成型煤颗粒组成的关系也被确定。确定了最佳的颗粒组成,使成型煤具有满意的热稳定性。因此,建立了技术上最先进的用于矿热炉还原冶炼的压块料的粒度组成。最好使用颗粒组成分数为0-1的适当比例的型煤;1 - 3;3-5 mm,比例为35/35/30和60/20/15,以及颗粒尺寸分布在这些变化范围内的型煤。
{"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":" ","pages":""},"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}
引用次数: 0
Optimizing the contours of open pit mining with the use of mining and geological information systems and technologies 利用采矿和地质信息系统和技术优化露天开采轮廓
IF 0.7 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-04-30 DOI: 10.31643/2023/6445.39
S. Tyo, Sh.B. Zeitinova
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.
本文利用采矿与地质信息系统和技术,对露天采矿的优化进行了研究。本研究的目的是开发一种利用采矿和地质信息系统优化露天矿轮廓的算法。在Whittle程序中应用了Lerch-Grossman算法。根据露天开采方案、露天开采块体的几何特征和特殊的技术经济参数,提出了改变露天开采轮廓的理由。该方案在开发过程中提高了生产效率,降低了资金和运营成本。作者认为,更新的采矿和地质信息系统的功能有助于在设计露天矿主要参数时考虑市场条件,并在准备矿床开发阶段做出正确的决策,同时优化现有露天矿轮廓。
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引用次数: 0
An Overview of the Current State and the Advantages of using acrylic resins as anticorrosive coatings 丙烯酸树脂防腐涂料的现状及优点综述
IF 0.7 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-04-30 DOI: 10.31643/2023/6445.44
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.
防腐涂层是保护结构免受各种负面外部影响的最常见方法之一。各种类型的防腐涂层可以成功地延长产品的使用寿命。然而,传统的涂料不是防水涂料,随着时间的推移,由于温度的波动,总是会出现小裂缝。与其他类型的涂料相比,丙烯酸涂料价格较低,同样耐用。丙烯酸树脂具有高防腐性能以及耐水性、抗冲击性、对基材的良好粘附性和整体耐久性。这种成本和性能的强大结合使丙烯酸涂料成为保护结构免受腐蚀的一种流行而明智的解决方案。本综述的主要目的是描述不同类型的丙烯酸树脂,并比较它们的性能、合成和缺点。预计这项工作将成为丙烯酸树脂未来发展的基石。
{"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":" ","pages":""},"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}
引用次数: 0
Classification of texts on emergency situations in Almaty 阿拉木图紧急情况文本分类
IF 0.7 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-04-30 DOI: 10.31643/2023/6445.36
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.
文本分类是对结构多样的文本进行有效分类的过程,包括各个阶段和方法。在本文中,实现了机器学习算法,如支持向量法、逻辑回归和k近邻法,用于对阿拉木图紧急新闻站点收集的文本进行分类。在实验过程中,数据采集阶段及其后续处理起着特殊的作用。在对数据集进行分类之前,进行初步的数据处理,包括去除停止词、标记化、词干提取、词形化、特征提取和构造特征向量等步骤。数据是通过使用脚本从开放资源中自动收集信息获得的。实验结果表明,与其他类型的分类器相比,基于逻辑回归的分类器提供了最好的性能结果。得到了每种算法的性能指标,从而可以对它们进行比较分析。
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引用次数: 0
Electrothermal processing of chrysotile-asbestos wastes with production of ferroalloy and extraction of magnesium into the gas phase 电热法处理温石棉废渣制铁合金及提取气相镁
IF 0.7 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-04-30 DOI: 10.31643/2023/6445.42
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%.
本文介绍了Kostanay Minerals JSC对温石棉生产废料处理的实验研究结果。提出了一种从温石棉废料中提取镁和硅质铁合金的电热工艺。测定了焦炭用量和钢屑用量对合金工艺参数的影响。介绍了温石棉废料样品的衍生分析和扫描电镜分析结果。研究包括使用二阶可旋转设计(Box-Hunter计划)的计划实验,技术参数的图形优化,以及使用单电极电弧炉在石墨坩埚中电熔化电荷。得到了充分的回归方程,说明了在温石棉废料中加入焦炭和钢屑的量对合金中硅的提取程度和合金中硅的浓度的影响。通过电熔得到硅含量为24.4 ~ 29.2%的FS25级硅铁和硅含量为41.6 ~ 45%的FS45级硅铁。结果表明,在焦炭含量为33.6-38%、钢屑含量为16-20.8%的情况下,合金中硅的析出度为75 ~ 85.4%的FS45级硅铁是形成的。FS25级硅铁是在30-38%的焦炭和29.4-40%的钢屑存在下形成的;硅的萃取度为68.6-73.8%。
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引用次数: 1
Effect of a complex modified additive based on post-alcohol bard on the strength behavior of concrete 后醇硬基复合改性添加剂对混凝土强度性能的影响
IF 0.7 Q4 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2023-04-30 DOI: 10.31643/2023/6445.34
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.
本文介绍了复合改性添加剂(CMA)的第三阶段研究结果,在CMA的可变成分对水泥强度影响的准确性方面。本文介绍了试样的制作方法,不同成分百分比下添加剂成分的选择,以及所得结果的强度行为分析。为了评估强度的变化,制作了样品,并在7、14和28天的正常湿硬化下进行了压缩和弯曲测试。实验结果表明,增塑剂(PAB)的加入使混凝土的强度提高20%,减少了35%的用水量。与对照成分相比,改性后样品的抗压和抗弯强度在42.80 ~ 63.66 MPa和3.34 ~ 8.75 MPa范围内,效果最佳。从研究结果来看,添加剂加速了硬化,并且发现添加剂在早期和设计龄期(28 d)都有助于强度的增长。实验结果表明,从改善样品的定性特性的角度来看,增塑剂的使用是适当的。在混凝土的组成中使用CMA增加了强度,因此由CMA的作者开发的CMA改变了混凝土的结构,最重要的是,增加了混凝土的物理和机械特性。
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引用次数: 0
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