富氧底吹炼铅氧化熔炼元素分配热力学模拟

基于最小吉布斯自由能原理,模拟计算了铅精矿富氧底吹炼铅工艺氧化熔炼段的元素分配行为,并与半工业试验数据进行对比。在典型工业富氧底吹炼铅工艺参数条件下,重点考察了氧料比对Pb、Cu、As、Sb、Bi等元素分配行为的影响。计算结果表明,Pb、Cu、As、Sb和Bi在渣相中的分配率随氧料比的提高而增加。当氧料比为175kg/t时,Pb、Cu、Sb和Bi在金属相、渣相和气相中的分配比例基本符合半工业试验统计数据,但As计算结果与半工业数据存在一定偏差,原因可能是由于缺乏精确的活度系数。

Thermodynamic Simulation on Elements Distribution of Lead Concentrate Oxidative Smelting in Oxygen-Rich Bottom-Blow Smelting Process

Based on minimal Gibbs free energy principle, element distributions in lead concentrate oxygen-rich bottom-blow smelting process were simulated and calculated, and compared with pilot experiment data. Under the typical technical parameters of oxygen-rich bottom-blow smelting process, influence of oxygen to feed ratio (OFR) on distribution behavior of Pb, Cu, As, Sb and Bi was investigated. The results indicate that distribution ratios of Pb, Cu, As, Sb and Bi in slag rise with increase of OFR. When OFR is 175 kg/t, distribution ratios of Pb, Cu, Sb and Bi in metal, slag and gas phases coincide with statistics data of pilot experiment. However, distribution ratio of As is not in line with the data due to lack of accurate activity coefficients.