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PbO-Sb_2O_3系熔渣的热力学性质对铅氧化精炼去锑有一定的参考价值。Pelzel曾在不同温度(690-1000℃)下测定了下列反应的平衡常数3PbO+2Sb=Sb_2O_3+3Pb~*。(1)但他在每一温度下只采用了一个固定组成的熔渣,因此不能根据他的实验数据进行熔渣热力学性质的计算。本文报告用不同组成的熔渣进行反应(1)平衡试验的结果,并借助于变通的Gibbs-Duhem积分法求出900℃下PbO-Sb_2O_3系熔渣的热力学数据。
The thermodynamic properties of PbO-Sb_2O_3-based slag have certain reference value for lead-oxidation refining of antimony. Pelzel had measured the equilibrium constant 3PbO + 2Sb = Sb_2O_3 + 3Pb ~ * for the following reactions at various temperatures (690-1000 ° C). (1) However, he uses only a fixed composition of slag at each temperature and therefore can not calculate the thermodynamic properties of the slag based on his experimental data. In this paper, we report the results of the equilibrium (1) reactions using slag with different compositions and obtain the thermodynamic data of PbO-Sb_2O_3-based slag at 900 ℃ by means of Gibbs-Duhem integration.