银精矿碱法熔炼工艺的扩大试验

来源期刊：中国有色金属学报1998年第2期

论文作者：徐盛明 肖克剑 汤志军 沈国厉 俞汝勤

文章页码：303 - 308

关键词：银精矿 铅精矿 苏打 还原熔炼

Key words：silver concentrate , lead concentrate , soda , reducing smelting

摘    要：用正交试验法研究了熔炼温度、 配煤量、配碱量及银精矿与铅精矿的质量比等因素对银精矿碱法熔炼中银、 铅直收率的影响， 建立了相应的回归模型；确定了苏打-钾碱 熔炼工艺的最佳工艺条件为：熔炼温度1000～1050 ℃， 停留时间1～2 h， 配煤率4％～6％， 钾碱率5％～7.5％及混矿比1∶1。 此时，可获得含铅≥98％， 含银约1％的粗铅， 铅、 银的直收率分别大于96％和92％。

Abstract: Basic smelting process for treatment of silver concentrate was studied on an enlarged scale. The influences of temperature, the amounts of coal and basic materials (soda or soda-potash) and the ratio of mass of silver concentrate to that of lead concentrrate, etc, on direct recovery of lead and silver in reducing smleting were investigated by orthogonalization experiments, and corresponding regression model was also established. Under the optimal conditions (temperature 1000～1500 ℃, time 1～2 h, reducing coal accounting for 4%～6% of mixed concentrates, potash accounting for 5%～7% of total base, mixing-ratio of two concentrates equal to 1∶1), good quality of raw lead from the soda-potash smelting process, containing 98% above Pb and about 1% Ag, can be produced, in which lead and silver recovery percentages can also exceed 96% and 92%, respectively.