福建某金矿选矿尾渣的无害化处置工艺  

Study on Harmless Disposal Process of Beneficiation Tailings for a Gold Mine in Fujian Province

作　　者：刘国晨 Liu Guochen(Zijin Mining Group Co.,Ltd,Shanghang,Fujian,China)

机构地区：[1]紫金矿业集团股份有限公司,福建上杭364200

出　　处：《矿产综合利用》2023年第1期177-181,共5页Multipurpose Utilization of Mineral Resources

摘　　要：为切实推进福建某金矿山的可持续发展,本研究在充分结合上游选矿工艺流程及指标的基础上,对选矿尾渣(炭浸尾浆及堆浸渣)处置进行了详细的实验研究。结果表明:对于炭浸尾浆中的含氰废液,采用碱氯化(漂白粉)法破氰工艺,可有效去除其中氰化物,CN-浓度从250 mg/L下降至0.217 mg/L,去除率达99.90%。实验指标成功应用于生产实践,效果同样显著。开发的选矿尾渣无害化处置工艺,即固体废渣(炭浸废渣和堆浸渣)混排用于生态修复,炭浸废水破氰达标后视生产实际回用或外排,极大地节约了矿区尾矿库库容,减少了排土场的占用。生产实践可为同类型金矿山选矿尾渣的末端处置提供基础依据。In order to promote the sustainable development of a gold mine in Fujian Province, based on the upstream beneficiation process and indicators, the treatment of beneficiation tailings(carbon leaching tail pulp and heap leaching residues) was studied in detail. The results showed that: Applying alkali-chlorination(bleaching powder) process in treatment for the cyanide containing waste liquid in carbon leaching tail pulp,the cyanide can be effectively removed, the CN-concentration is reduced from 250 mg/L to 0.217 mg/L,and the removal rate is more than 99.90%. The test index is successfully applied to the production practice,and the effect is also remarkable. The developed beneficiation tailings harmless disposal process, that is,solid slag muck(carbon leaching and heap leaching residues) mixed emissions for ecological restoration,carbon leaching wastewater after reaching the cyanide concentration standard is recycled or discharged according to the actual production, which greatly saves the storage capacity of tailings pond and reduces the occupation of waste dump. The production practice can provide basic basis for the end treatment of beneficiation tailings in the same type of gold mines.

关 键 词：炭浸尾浆 堆浸渣 碱氯化(漂白粉)法 无害化处置 

分 类 号：TD952[矿业工程—选矿]