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为了阐明QSL法直接炼Pb的化学反应动力学,研究PbS与PbO及xPbO·SiO_2的交互作用是具有实际意义的。为了避免高温造成PbS和PbO的挥发损失,在较低温度下研究该体系的交互反应动力学,对探索火法炼Pb新工艺具有一定价值。试料是分析纯PbO,PbS和合成的纯xPbO·SiO_2,试料粒度均为100—120 mesh,在配比试样中以PbO:PbS=2:1作基础并混匀,以便保证按化学计量反应产生SO_2。装有试料的刚玉坩埚在密封竖直刚玉管底部低温区用Ar气保护升温加热,待达到预期温度后,坩埚由密封系统中的活动撑杆推到高温区并同时用Ar气载流使产生的SO_2连续为碘量法所测
In order to elucidate the chemical reaction kinetics of direct smelting Pb by QSL method, it is of practical significance to study the interaction between PbS and PbO and xPbO.SiO_2. In order to avoid the volatile loss of PbS and PbO caused by high temperature, studying the interaction kinetics of this system at lower temperature is of certain value in exploring the new pyrometallurgical Pb process. The samples were analyzed for pure PbO, PbS and synthetic pure xPbO · SiO_2. The sample size was 100-120 mesh. Based on the PbO: PbS = 2: 1 ratio in the sample, The measurement reaction produces SO 2. Corundum crucible with sample in the bottom of the sealed vertical corundum tube with Ar gas heating and heating at the bottom of the temperature, to be the desired temperature, the crucible from the sealing system of active strut pushed to the high temperature zone while carrying Ar flow The resulting SO 2 is continuously measured by iodometry