某黄金冶炼企业高盐工艺水处理试验研究  

Experimental study on treatment technology of high salt process water in a gold smelting enterprise

作　　者：崔崇龙 孙青波 迟崇哲 邱陆明 刘金凤 Cui Chonglong;Sun Qingbo;Chi Chongzhe;Qiu Luming;Liu Jinfeng(Changchun Gold Research Institute Co.,Ltd.;Liaoning Tianli Gold Co.,Ltd.)

机构地区：[1]长春黄金研究院有限公司 [2]辽宁天利金业有限责任公司

出　　处：《黄金》2024年第2期93-98,共6页Gold

基　　金：吉林省科技发展计划项目(20220203101SF)。

摘　　要：以某黄金冶炼企业高盐工艺水为原料,通过全组分分析,探明污染物组成。采用脱除钙镁预处理、化学沉淀法、蒸发结晶法(MVR法、薄膜蒸发法)、冷冻结晶法等进行探索试验研究,结果表明:当碳酸钠添加用量为2 g/L时,对钙、镁杂质离子有较好的去除效果;氯化钙法和氯化钡法在0.5 h能达到最佳处理效果,SO_(4)^(2-)去除率分别为79.5%和91.5%;MVR法蒸发清液中各离子质量浓度很低,主要集中在结晶中,平均结晶回收率为93.9%;当薄膜蒸发法温度为80℃,浓缩5倍左右时,蒸发清液中污染物质量浓度很低,可全部回用,浓缩液经蒸发可制备硫酸钠晶体,其回收率为94.4%;冷冻结晶法在冷冻温度-4℃、冷冻时间24 h时,结晶不再增加,此时平均结晶回收率为71.8%,冷冻母液含硫酸钠降到3.1%,可返回流程使用。Using the high salt process water of a gold smelting enterprise as raw materials,the composition of pollutants were identified through full component analysis.The pretreatment of calcium and magnesium removal,chemical precipi-tation,evaporative crystallization(MVR,film evaporation),freezing crystallization,and other treatment technologies were used for explorative and experimental research.The results showed that when the amount of sodium carbonate was 2 g/L,calcium and magnesium impurity ions were removed effectively;calcium chloride and barium chloride can achieve the best treatment effect in 0.5 h,and the removal rates of SO 2-4 are 79.5%and 91.5%respectively;the mass concentration of ions in MVR evaporated clear liquid is very low,and mainly concentrated in crystallization.The average recovery rate of crystallization is 93.9%;when the film evaporation temperature is 80℃and the concentration is at 5 multiples,the mass concentration of pollutants in the clear solution is very low and can be fully reused,and the concentrated solution can be evaporated into sodium sulfate crystals,of which the recovery rate is 94.4%;when the freezing temperature is-4℃and the freezing time is 24 h,the crystallization will not increase.At this time,the average recovery of crystallization is 71.8%,and the content of sodium sulfate in the frozen mother liquor decreases to 3.1%,which can be returned to the process for use.

关 键 词：高盐工艺水 化学沉淀 蒸发结晶 冷冻结晶 MVR技术 

分 类 号：TD926.5[矿业工程—选矿]