氨法浸出某精矿中低含量镍铜钴的试验研究  

Experimental Study on the Ammonia Leaching of Low Content of Ni,Cu and Co from A Concentration

作　　者：韩跃新[1] 马松勃[1] 王宇斌[2] 赵毕文[3] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110004 [2]西安建筑科技大学,陕西西安710055 [3]金川集团股份有限公司,甘肃金昌737100

出　　处：《矿冶工程》2014年第6期56-59,共4页Mining and Metallurgical Engineering

基　　金：国家自然科学基金项目(51074036;51134002);国家高技术研究发展计划(863)项目(2012AA062401)

摘　　要：以某深度碳还原处理后的镍冶炼渣的磁选精矿为研究对象,对其组成以及镍、铜和钴在其中的赋存状态进行了检测和分析,研究了浸出该精矿中铜、镍、钴的可行性。以氨水-碳酸盐缓冲溶液为浸出剂,氧气为氧化剂,分别探讨了物料细度、浸出时间、浸出温度、氨水浓度、铵盐浓度和氧气压力对浸出效果的影响,得出最优浸出工艺为:物料料度为d90=68μm,氨水浓度为3.0 mol/L,碳酸铵浓度为0.5 mol/L,氧气压力为0.3 MPa,温度为60℃,浸出时间为120 min。在此条件下,铜浸出率为62.5%,镍浸出率为10%,钴浸出率为65.8%。并以铜为例,对氨浸试验进行了简要的机理分析。A magnetic concentrate of nickel smelting slag after deep carbon reduction was taken for analysis of its compositions and occurrence of Ni, Cu and Co in it, so as to investigate the feasibility of leaching of Cu, Ni, Co from the concentrate. With ammonia-carbonate buffer solution as leaching agent and oxygen as oxidizing agent, impacts of grain size, leaching time and temperature, concentration of ammonium hydroxide and ammonium salt, and oxygen pressure on the leaching effect were discussed respectively. It is found that with the following optimum conditions for leaching process： material size （dgo = 68 μm） , concentrations of NH4OH and （NH4） 2C03 at 3.0 mol/L and 0.5 mol/L respectively, oxygen pressure at 0.3 MPa, leaching at 60 ℃ for 120 min, leaching rates of Cu, Ni and Co reach 62.5%, 10% and 65.8%, respectively. At the end, the kinetics of Cu leaching behavior was analyzed.

关 键 词：冶炼炉渣 氨浸法 深度碳还原 磁选精矿 浸出率 物料细度 镍 钴 铜 

分 类 号：X756[环境科学与工程—环境工程]