(1 湖南大學化學化工學院， 長沙 410082；
2 湖南有色金屬研究所， 長沙 410007)
摘 要: 用正交試驗法研究了熔煉溫度、 配煤量、配堿量及銀精礦與鉛精礦的質(zhì)量比等因素對銀精礦堿法熔煉中銀、 鉛直收率的影響， 建立了相應的回歸模型；確定了蘇打-鉀堿 熔煉工藝的最佳工藝條件為：熔煉溫度1000～1050 ℃， 停留時間1～2 h， 配煤率4％～6％， 鉀堿率5％～7.5％及混礦比1∶1。 此時，可獲得含鉛≥98％， 含銀約1％的粗鉛， 鉛、 銀的直收率分別大于96％和92％。
關鍵字: 銀精礦 鉛精礦 蘇打 還原熔煉
（1 College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China；
2 Hunan Research Institute of Nonferrous Metals, Changsha 410007, P. R. China）
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.
Key words: silver concentrate lead concentrate soda reducing smelting
