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首页> 外文期刊>Materials transactions >Phase Equilibrium between Ni-S Melt and CaO-Al_2O_3 Based Slag in CO-CO_2-SO_2 Gas Mixtures at 1773 K
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Phase Equilibrium between Ni-S Melt and CaO-Al_2O_3 Based Slag in CO-CO_2-SO_2 Gas Mixtures at 1773 K

机译：Ni-S熔体和基于CaO-Al_2O_3的矿渣在CO-CO_2-SO_2混合气体中在1773 K时的相平衡

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摘要

To provide thermodynamic data for converting the nickel matte to liquid nickel, an experimental study was conducted in the phase equilibrium between the Ni-S alloy and the CaO-Al_2O_3 based slag melted in a MgO or Al_2O_3 crucible at 1773 K under controlled P_(SO_2) of 10.1 kPa and P_(O_2) in a range between 5.0 X 10~(-3) and 1.6 Pa by using CO-CO_2-SO_2 gas mixtures. The contents of nickel in these slags at P_(O_2) of 1.6 Pa, above which solid NiO is expected to precipitate in equilibrium state, were found to be 5.6 and 7.2 mass percent for the slags melted in the MgO and Al_2O_3 crucibles, respectively. The contents of sulfur and oxygen in the nickel melt at P_(O_2) of 1.6 Pa were 2 and 0.4 mass percent, respectively. The CaO-Al_2O_3 based slag with the mass percent ratio (CaO/Al_2O_3) of about 1 melted in the MgO crucible was homogeneous in the investigated P_(O_2) range. While, that with the ratio of about 0.5 melted in the Al_2O_3 crucible formed two phases composed of a liquid and an Al_2O_3-NiO solid solution whose nickel content was increased with increasing P_(O_2). The dissolutions of nickel and sulfur in the slag melted in the MgO crucible were discussed on the basis of distribution ratio and sulfide capacity, respectively.
机译：为了提供将镍毛转变为液态镍的热力学数据，在受控P_（SO_2通过使用CO-CO_2-SO_2气体混合物，在5.0 X 10〜（-3）和1.6 Pa之间的范围内，可得到10.1 kPa和P_（O_2）的气体。在P_（O_2）为1.6 Pa时，这些熔渣中镍的含量分别为MgO和Al_2O_3坩埚中熔融的熔渣，分别为5.6质量％和7.2质量％，预计固态NiO会以平衡状态沉淀。在P_（O_2）为1.6 Pa的镍熔体中硫和氧的含量分别为2和0.4质量％。在研究的P_（O_2）范围内，MgO坩埚中熔化的质量比（CaO / Al_2O_3）为约1的CaO-Al_2O_3基熔渣是均匀的。而在Al_2O_3坩埚中以约0.5的比例熔化，形成由液相和Al_2O_3-NiO固溶体组成的两相，其镍含量随P_（O_2）的增加而增加。分别根据分布比和硫化物容量，讨论了镍和硫在MgO坩埚中熔融的炉渣中的溶解情况。

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