摘要
海水选金因具有绿色环保的特性受到广泛关注。该技术利用海水中丰富的氯离子与金离子形成稳定络合物的特性,实现对金的选择性浸出。纱岭金矿基于独特的地理位置和资源条件,采用海水选金不仅能大幅减少对淡水资源的依赖,降低运营成本,还能适应深井开采的特殊需求。试验结果表明:海水选金对纱岭金矿的浮选指标影响较小,金回收率可达95.85%。氰化试验取得了理想的技术指标,在磨矿细度-0.045 mm占比95%,CaO用量达到6000 g/t,碱处理时间3 h,NaCN用量7000 g/t,矿浆浓度40%,浸出时间48 h条件下,获得了浸渣金品位1.19 g/t、金浸出率97.96%的良好选别指标。海水选金在纱岭金矿的应用是资源条件、技术可行性和环保政策共同作用的结果,体现了现代矿业可持续发展的趋势。
Seawater‑based gold extraction has attracted widespread attention due to its environmentally friendly characteristics.This method leverages the ability of the rich chloride ions in seawater to form stable complexes with gold ions,enabling selective leaching of gold.Given its unique geographical location and resource conditions,the Shaling Gold Mine adopted seawater‑based gold extraction,which significantly reduces dependence on freshwater resources,lowers operational costs,and meets the specific demands of deep underground mining.Experimental results indicate that seawater‑based gold extraction has minimal impact on the flotation metrics in the Shaling Gold Mine,with a gold recovery rate reaching 95.85%.The cyanidation tests yielded favorable technical results:under the conditions of grinding fineness of−0.045 mm accounting for 95%,CaO dosage of 6000 g/t,alkaline pretreatment time of 3 h,NaCN dosage of 7000 g/t,pulp concentration of 40%,and leaching time of 48 h,good separation performance including a leach residue grade of 1.19 g/t and a gold leaching rate of 97.96%was achieved.The application of seawater‑based gold extraction at the Shaling Gold Mine reflects the combined influence of resource conditions,technical feasibility,and environmental policies,representing a sustainable development trend in modern mining.
作者
王秀会
Wang Xiuhui(Laizhou Huijin Mining Investment Co.,Ltd.)
出处
《黄金》
2025年第8期39-42,共4页
Gold
基金
国家重点研发计划项目(2016YFC0600800)。
关键词
金矿
海水选金
浮选
氰化
复杂难处理
可持续发展
gold mine
seawater‑based gold extraction
flotation
cyanidation
complex and refractory
sustainable development
