针对某金矿全泥氰化尾渣理化性质和污染物特点,以达到GB/T 30760—2014 《水泥窑协同处置固体废物技术规范》中水泥熟料中重金属铅量限制要求为目的,探索采用自研药剂协同热处理氰化尾渣轻集料载体中重金属铅的可行性。试验考察了不同净化剂类型、净化剂投加量、预焙烧温度及?奔洹⒈荷瘴露燃笆奔涞纫蛩囟郧θコЧ挠跋,并确定最佳反应条件。试验结果表明:采用1#净化剂和2#净化剂协同热处理后的轻集料均可以满足标准要求；轻集料配方A确定的最佳反应条件为预焙烧温度450 ℃,预焙烧时间1 h,焙烧温度1 200 ℃,焙烧时间0.5 h,1#净化剂投加量1.5 %；轻集料配方B确定的最佳反应条件为预焙烧温度400 ℃,预焙烧时间30 min,焙烧温度1 175 ℃,焙烧时间20 min,选择2#净化剂,投加量1.5 %，生产成本约为100元/t。

According to the physical and chemical properties and pollutant characteristics of all-sliming cyanidation tailings from a gold mine,to meet the limit requirements of heavy metals Pb content in cement clinker in GB/T 30760—2014 Technical Specification for Coprocessing of Solid Waste in Cement Kiln,the feasibility of using a self-developed agent to treat the heavy metal Pb in cyanide tailings lightweight aggregate carrier with collaborative treatment at high temperature is explored.The effects of different types of purifying agents,the dosage of purifying agents,pre-roasting temperature and time,and roasting temperature and time on the removal of the heavy metal Pb are investigated,and the optimum reaction conditions are determined.The test results show that the lightweight aggregate treated with 1# purifying agent and 2# purifying agent (self-developed agent) with collaborative treatment at a high temperature can meet the requirements of the standard;for the lightweight aggregate formula A,the optimum reaction conditions are determined as follows:pre-roasting temperature 450 ℃,pre-roasting time 1 h,roasting temperature 1 200 ℃,roasting time 0.5 h,1# purifying agent dosage 1.5 %;for the light aggregate formula B,the optimum reaction conditions are determined as follows:pre-roasting temperature 400 ℃,pre-roasting time 30 min,roasting temperature 1 175 ℃,roasting time 20 min,1.5 % dosage for 2# purifying agent and about 100 yuan/t for the operation cost.