SOLUBILITY OF NITROGEN IN SLAG

氮在炉渣中的溶解度

• 批准号: 63550488
• 负责人: TSUKIHASHI Fumitaka
• 金额: $ 1.79万
• 依托单位: THE UNIVERSITY OF TOKYO
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63550488/
• 关键词: Slag; Flux; Nitrogen; Solubility; Nitride ion; Thermodynamics; Silicate; 窒素溶解度; シリケート

The solubility of nitrogen in various flux systems was investigated by the chemical equilibration technique in order to know the physicochemical properties of nitrogen in molten flux. The compositions of fluxes investigated in the present study varied from the acidic flux being used in glass industry to basic flux for the iron and steelmaking. The effects of composition of fluxes, partial pressures of oxygen and nitrogen and temperature on the nitrogen solubility were measured and following results were obtained.1. The solubility of nitrogen in CaO-CaF_2 melts was constant with changing the oxygen partial pressure from 10^<-6>atm to 10^<-11>atm at 1375ﾟC. 2. The solubilities of free nitride ions and incorporated nitride ions were measured at 1550ﾟC for the CaO-SiO_2 system. It has been proposed that nitrogen dissolves in melts by two mechanisms, namely as free nitride ions and incorporated nitride ions. 3. The solubilities of nitrogen in CaO-CaF_2-SiO_2 fluxes were measured on the liquidus at 1300ﾟC. The change in total nitrogen content in CaO-CaF_2-SiO_2 system is the complicated reflection of various effects such as the free and incorporated nitride dissolution and fluorosilicate formation. 4. The dependence of nitrogen solubility on the flux compositions was observed for the CaO-MgO-SiO_2 and BaO-MgO-SiO_2 systems at 1450ﾟC. The solubility for the CaO-MgO-SiO_2 system is higher than that for the. BaO-MgO-SiO_2 system. For both systems, the free nitride ions decreased and the incorporated nitride ions increased with increasing SiO_2 content.

通过化学平衡技术研究了氮气在各种通量系统中的溶解度，以便在熔融通量中氮的物理化学效果。铁和钢的氧化物的组成，氧气和温度的部分压力对氮进行了测量，并获得了以下结果。1从10^<-6> atm到1375 ﾟ2的10^<-11> ATM。自由氮化物的溶解度为CAO-SIO_2系统的IOON的溶解度为1 550°C。通过氮化离子和氮化液融合的熔融融化在Cao-Caf_2-sio_2中的Trogen。作为氮化物溶解和进食4。对于氮化物离子的减小，氮化物离子随着SIO_2含量的增加而增加。

项目成果

ELOY MARTINEZ: "Nitrogen SoLubility in CaO-SiO_2,CaO-MgO-SiO_2 and BaO-MgO-SiO_2 Melts" Metallurgical Transactions B. 21B. (1990)

ELOY MARTINEZ：“CaO-SiO_2、CaO-MgO-SiO_2 和 BaO-MgO-SiO_2 熔体中的氮溶解度”冶金学报 B. 21B。

ELOY MARTINEZ: "Nitrogen Solubility in CaO-CaF_2-SiO_2 Melts" Metallurgical Transactions B. 21. (1990)

ELOY MARTINEZ：“CaO-CaF_2-SiO_2 熔体中的氮溶解度”Metallurgical Transactions B.21。(1990)

ELOY MARTINEZ et al.: "Nitrogen Solubility in CaO-SiO_2, CaO-MgO-SiO_2 and BaO-MgO-SiO_2 Melts" Metallurgical Transactions B, Vol. 21B, 1990.

ELOY MARTINEZ 等人：“CaO-SiO_2、CaO-MgO-SiO_2 和 BaO-MgO-SiO_2 熔体中的氮溶解度”Metallurgical Transactions B，卷。

ELOY MARTINEZ: "Nitrogen Solubility in CaO-CaF_2-SiO_2 Melts" Metallurgical Transactions B. 21B. (1990)

ELOY MARTINEZ：“CaO-CaF_2-SiO_2 熔体中的氮溶解度”冶金汇刊 B. 21B。

ELOY MARTINEZ et al.: "Nitrogen Solubility in CaO-CaF_2-SiO_2 Melts" Metallurgical Transactions B, Vol. 21B, 1990.

ELOY MARTINEZ 等人：“CaO-CaF_2-SiO_2 熔体中的氮溶解度”Metallurgical Transactions B，卷。