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首页> 外文期刊>ISIJ international >Thermodynamics Of Copper Dissolution Into Mno-sio_2-mns Inclusion System
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Thermodynamics Of Copper Dissolution Into Mno-sio_2-mns Inclusion System

机译：铜溶解于Mno-sio_2-mns包裹体中的热力学

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Recently, a new process has been introduced to control α-γ transformation of steels using cuprous sul-fide precipitates on the MnO bearing oxide inclusion as well as MnS. In order to optimize the composition of inclusions, the solubility of copper into MnO-SiO_2-MnS system were measured at 1 523 K and a dissolution mechanism of copper into an oxy-sulfide melts and cuprous sulfide capacity has been proposed. The solubility of copper increased with an increase in MnO/(MnO+SiO_2) ratio and showed a maximum solubility at MnO and MnS doubly saturated composition, which was consistent with the maximum precipitation ratio of CuS. Deliberating an oxy-sulfide melts saturated with MnS, MnO, and SiO_2 at 1 523 K, the phase diagram for the MnO-SiO_2-MnS system indicated that the activity coefficient of cuprous sulfide in an oxy-sulfide melts was dependent on the activity of MnO and the activity coefficient of MnS. The dissolution mechanism of copper into a MnO-MnS inclusion system was confirmed and cuprous sulfide capacity was also defined from the reaction mechanism. Cuprous sulfide capacity for the MnO-MnS bearing inclusion strongly depends on stability of sulfide and basicity. The experimental results revealed that the optimized composition for inclusion to dissolve copper was (mass%MnO)=43.6, (mass%SiO_2) = 1.8 and (mass%MnS)=54.6. Consequently, it could be proposed that the harmlessness of copper in scrap and dispersion strengthening could be possible by using the non-metallic inclusion technique.
机译：最近，已经引入了一种新的工艺来控制钢的α-γ转变，该工艺使用了MnO氧化物夹杂物和MnS上的亚硫酸亚铜沉淀。为了优化夹杂物的组成，在1523 K下测量了铜在MnO-SiO_2-MnS体系中的溶解度，并提出了铜在氧化硫熔体中的溶解机理和硫化亚铜容量。铜的溶解度随MnO /（MnO + SiO_2）比的增加而增加，并且在MnO和MnS双饱和组分中表现出最大溶解度，这与CuS的最大析出率一致。考虑在1523 K下用MnS，MnO和SiO_2饱和的氧硫化物熔体，MnO-SiO_2-MnS体系的相图表明，在氧硫化物熔体中硫化亚铜的活度系数取决于MnO和MnS的活度系数。证实了铜在MnO-MnS夹杂体系中的溶解机理，并通过反应机理定义了硫化亚铜的容量。含MnO-MnS夹杂物的硫化亚铜能力在很大程度上取决于硫化物的稳定性和碱性。实验结果表明，用于溶解铜的夹杂物的最佳组成为（质量％MnO）＝ 43.6，（质量％SiO_2）＝ 1.8，（质量％MnS）＝ 54.6。因此，可以提出使用非金属夹杂物技术可以实现废料中铜的无害化和弥散强化。

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