Since high social demands have been focused on detoxification as well as recycling of industrial wastes, the role of melting furnaces for wastes has been highlighted these days. However, due to scattering of compositions of components in industrial wastes, we are required to operate melting furnaces stably and to elucidate adequate operating conditions even for some compounds which are difficult to be melted under usual operations. In the present paper, we investigated 1) phase equilibria by thermodynamic databases, and 2) fluidity of molten slag for several compounds provided in melting furnaces. Then, we found that beneficial information was available on composition and temperature ranges of molten slag by thermodynamic investigation, which could provide useful guide to melt even asbestos and high-melting point compounds.
{"title":"Investigation of Liquidus Area and Fluidity of Oxides Affecting Stable Operation of Melting Furnace","authors":"Y. Miyabayashi, T. Yoshikawa, Toshihiro Tanaka","doi":"10.7791/JHTS.32.281","DOIUrl":"https://doi.org/10.7791/JHTS.32.281","url":null,"abstract":"Since high social demands have been focused on detoxification as well as recycling of industrial wastes, the role of melting furnaces for wastes has been highlighted these days. However, due to scattering of compositions of components in industrial wastes, we are required to operate melting furnaces stably and to elucidate adequate operating conditions even for some compounds which are difficult to be melted under usual operations. In the present paper, we investigated 1) phase equilibria by thermodynamic databases, and 2) fluidity of molten slag for several compounds provided in melting furnaces. Then, we found that beneficial information was available on composition and temperature ranges of molten slag by thermodynamic investigation, which could provide useful guide to melt even asbestos and high-melting point compounds.","PeriodicalId":113412,"journal":{"name":"Journal of High Temperature Society","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122631222","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}
Yoshihiro Isshiki, H. Yamaguchi, Gosaku Kawai, Hiizu Ochi, Koichi Ogawa
{"title":"S25C およびSUS304 の同種材摩擦圧接における温度分布の数値解析","authors":"Yoshihiro Isshiki, H. Yamaguchi, Gosaku Kawai, Hiizu Ochi, Koichi Ogawa","doi":"10.7791/JHTS.32.236","DOIUrl":"https://doi.org/10.7791/JHTS.32.236","url":null,"abstract":"","PeriodicalId":113412,"journal":{"name":"Journal of High Temperature Society","volume":"46 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133292136","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}
Takahiro Mori, Seiichi Saito, Shigemasa Saito, K. Fujimoto
The amount of halogenated dioxins in combustion gases of printed circuit boards depends on the concentration of halogen in the substrate, and also changes with resin structures to be applied. In this study, it was revealed that by combined use of fine aluminum hydroxide, phosphate flame retardant and alicyclic epoxy resin instead of halogenated epoxy resin or aromatic epoxy resin, these printed circuit boards met UL94-V0 flammability classification. Furthermore halogenated dibenzodioxin/dibenzofuran was hardly detected in combustion gases. The printed circuit boards which consisted of alicyclic epoxy resin could control generating of halogenated dioxins, as compared with aromatic resin. According to the heat decomposition behavior, it was suggested that alicyclic resin was easy to decompose because of weak C-C bond strength and generating of halogenated dioxins were controlled by the structure of resins.
{"title":"Inhibition of Dioxins in Combustion of Printed Wiring Boards by Use of Hydrogenated Alicyclic Epoxy Resin","authors":"Takahiro Mori, Seiichi Saito, Shigemasa Saito, K. Fujimoto","doi":"10.7791/JHTS.32.208","DOIUrl":"https://doi.org/10.7791/JHTS.32.208","url":null,"abstract":"The amount of halogenated dioxins in combustion gases of printed circuit boards depends on the concentration of halogen in the substrate, and also changes with resin structures to be applied. In this study, it was revealed that by combined use of fine aluminum hydroxide, phosphate flame retardant and alicyclic epoxy resin instead of halogenated epoxy resin or aromatic epoxy resin, these printed circuit boards met UL94-V0 flammability classification. Furthermore halogenated dibenzodioxin/dibenzofuran was hardly detected in combustion gases. The printed circuit boards which consisted of alicyclic epoxy resin could control generating of halogenated dioxins, as compared with aromatic resin. According to the heat decomposition behavior, it was suggested that alicyclic resin was easy to decompose because of weak C-C bond strength and generating of halogenated dioxins were controlled by the structure of resins.","PeriodicalId":113412,"journal":{"name":"Journal of High Temperature Society","volume":"11 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130147797","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. Terada, J. Iwatsuki, Hiroyuki Ota, Hideki Noguchi, S. Ishikura, R. Hino, T. Hirayama
Japan Atomic Energy Agency is developing chemical reactors for a pilot test plant of thermochemical IS process. Sulfuric acid (H 2 SO 4 ) decomposer, one of the key equipments of IS process plant, can vaporize concentrated sulfuric acid and decompose it into SO 3 and H 2 O using sensible heat of high temperature helium gas. Feasibility of a sulfuric acid decomposer featuring multi-block-type heat exchanger made of SiC ceramics was examined by preliminary analysis of structural strength, test-fabrication of the ceramic block, and seal performance tests between SiC blocks and metal flanges. Multi-phase flow analysis code coupled to chemical reaction was developed to establish a system of “design by analysis” for facilitating the development of chemical reactors. The codes handles process solutions which exhibit complicated phase behavior. Performance of the codes was confirmed by preliminary bench model analyses, which reproduced behavior of chemical gas absorption and also of liquid-liquid phase separation phenomena.
{"title":"Development of Chemical Reactors for Thermochemical Water-Splitting IS(Iodine-Sulfer) Process","authors":"A. Terada, J. Iwatsuki, Hiroyuki Ota, Hideki Noguchi, S. Ishikura, R. Hino, T. Hirayama","doi":"10.7791/JHTS.32.63","DOIUrl":"https://doi.org/10.7791/JHTS.32.63","url":null,"abstract":"Japan Atomic Energy Agency is developing chemical reactors for a pilot test plant of thermochemical IS process. Sulfuric acid (H 2 SO 4 ) decomposer, one of the key equipments of IS process plant, can vaporize concentrated sulfuric acid and decompose it into SO 3 and H 2 O using sensible heat of high temperature helium gas. Feasibility of a sulfuric acid decomposer featuring multi-block-type heat exchanger made of SiC ceramics was examined by preliminary analysis of structural strength, test-fabrication of the ceramic block, and seal performance tests between SiC blocks and metal flanges. Multi-phase flow analysis code coupled to chemical reaction was developed to establish a system of “design by analysis” for facilitating the development of chemical reactors. The codes handles process solutions which exhibit complicated phase behavior. Performance of the codes was confirmed by preliminary bench model analyses, which reproduced behavior of chemical gas absorption and also of liquid-liquid phase separation phenomena.","PeriodicalId":113412,"journal":{"name":"Journal of High Temperature Society","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125458151","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}
Recently, miniaturization and light weight conversion of the satellite itself have become necessary. And high improvement of efficiency of the thruster has become necessary with the substantial restriction of the electric energy which it can use. In this study, conversion utilization of general solar light energy to electric power was proposed as the method of obtaining energy at outer space. We observed the arc-jet thruster because the thrust density was high even in the thrusters and the system and structure was relatively simple. Digital control power supply to electric power was developed in order to convert low, and to miniaturize and lighten the arc-jet thruster. As a result, discharge starting reproducibility with single power supply was good and we succeeded in stable arc discharge in the low electric current territory.
{"title":"Development of Low-Power Arc-Jet Thruster for Satellite with Digital Control Power Supply","authors":"Y. Ohnishi, S. Ueda, M. Inomoto, Takeshi Fukuda","doi":"10.7791/JHTS.31.307","DOIUrl":"https://doi.org/10.7791/JHTS.31.307","url":null,"abstract":"Recently, miniaturization and light weight conversion of the satellite itself have become necessary. And high improvement of efficiency of the thruster has become necessary with the substantial restriction of the electric energy which it can use. In this study, conversion utilization of general solar light energy to electric power was proposed as the method of obtaining energy at outer space. We observed the arc-jet thruster because the thrust density was high even in the thrusters and the system and structure was relatively simple. Digital control power supply to electric power was developed in order to convert low, and to miniaturize and lighten the arc-jet thruster. As a result, discharge starting reproducibility with single power supply was good and we succeeded in stable arc discharge in the low electric current territory.","PeriodicalId":113412,"journal":{"name":"Journal of High Temperature Society","volume":"148 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130054191","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}
{"title":"高周波誘導加熱により部分熱処理したFe-Cr-Ni-Al-C合金製モ－タ用回転子の組織と磁気特性","authors":"横山 紳一郎, 洋一 河合, 宜俊 南埜","doi":"10.7791/JHTS.31.239","DOIUrl":"https://doi.org/10.7791/JHTS.31.239","url":null,"abstract":"","PeriodicalId":113412,"journal":{"name":"Journal of High Temperature Society","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126587276","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. Futamata, Y. Hoshino, K. Nakanishi, H. Itoh, Nobuhiro Ohnishi
{"title":"Hydrophilicity Characteristics of Thermal Sprayed Coating Produced Using Calcination Powders Recovered from Waste Dry Batteries","authors":"M. Futamata, Y. Hoshino, K. Nakanishi, H. Itoh, Nobuhiro Ohnishi","doi":"10.7791/JHTS.30.164","DOIUrl":"https://doi.org/10.7791/JHTS.30.164","url":null,"abstract":"","PeriodicalId":113412,"journal":{"name":"Journal of High Temperature Society","volume":"262 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128431855","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：