植物副产物浸出分离氧化型锰银矿的研究  

Study on leaching separation of oxidized manganese-silver ore with plant by-product

作　　者：余丽秀[1] 孙亚光[2] 张然[1] 宋广毅[1] 

机构地区：[1]中国地质科学院郑州矿产综合利用研究所,河南郑州450006 [2]河南工业大学材料科学与工程学院

出　　处：《无机盐工业》2012年第12期40-42,共3页Inorganic Chemicals Industry

基　　金：国土资源大调查项目(编号:1212010816038)

摘　　要：介绍了利用植物副产物(秸秆、粮食加工副产壳类等)作为还原剂还原浸出氧化型锰银精矿中的锰、浸锰渣氰化浸银的锰银分离工艺。玉米秸秆还原浸锰条件:秸秆粉在95℃预降解糖化0.5 h、降解糖化液与精矿的体积质量比为3 mL/g、硫酸与锰的物质的量比为1.4、秸秆与精矿的质量比为0.275、95℃浸出5 h,在此条件下锰的浸出率约92%。浸锰渣氰化浸银条件:每吨浸锰渣氰化钠用量为3 kg、常温浸银3 h,在此条件下银的浸出率达到92.20%。研究的锰银分离工艺具有较好的综合效果。The manganese-silver separation process ,which uses plant by-product （straw and husk by-produced from grain processing etc.） as reducing agent for reduction leaching manganese in manganese-silver concentrate and for silver leaching from residue of manganese-leaching with cyanide was introduced.The conditions of corn straw reduction leaching manganese were as follows ： straw powder pre-degradation and saccharification at 95 ℃ for 0.5 h, volume-mass ratio of degradation saccharification liquid to manganese-silver concentrate was 3 mL/g, amount of substance ratio-of-sulfuric acid to manganese was 1.4, mass ratio of straw to ore powder was 0.275 ,and leaching temperature and time were 95 ℃ and 5 h ,respectively.The manganese leaching rate was about 92% under those conditious.Ag leaching rate of 92.20% could be achieved under the conditions when the dosage of NaCN was 3 kg per ton of the residue of manganese-leaching and the leaching temperature and time were room temperature and 3 h, respectively.The separation technology of manganese and silver had a very good comprehensive effect.

关 键 词：锰银矿 植物副产物 还原浸锰 浸锰渣浸银 

分 类 号：TQ137.12[化学工程—无机化工]