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高硒氰化银泥综合回收试验研究与应用
- 作者：
- 王卫亭|张晓军|李元鑫|孙晓丰|张少良|余建民
- 作者单位：
- 山东金创金银冶炼有限公司|山东金创金银冶炼有限公司|山东金创金银冶炼有限公司|山东金创金银冶炼有限公司|山东金创金银冶炼有限公司|山东金创金银冶炼有限公司
基金项目：
- isnull
详细信息：
- 作者简介：
- 王卫亭（1964—），男，山东招远人，高级工程师，硕士，从事贵金属化学冶金工作；山东省烟台市蓬莱区大柳行镇，山东金创金银冶炼有限公司，265615；E-mail：wangweiting63@163.com
- 通讯作者：
- E-mail：jianminyu1961@126.com，13099452589
- PDF下载
Experimental study on comprehensive recovery of cyanidation silver slime with high selenium and its application
- English Author：
- Shandong Jinchuang Gold and Silver Smelting Co.,Ltd.|Shandong Jinchuang Gold and Silver Smelting Co.,Ltd.|Shandong Jinchuang Gold and Silver Smelting Co.,Ltd.|Shandong Jinchuang Gold and Silver Smelting Co.,Ltd.|Shandong Jinchuang Gold and Silver Smelting Co.,Ltd.|Shandong Jinchuang Gold and Silver Smelting Co.,Ltd.
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
针对高硒氰化银泥的特点，采用控电氯化法对其进行预处理，并采用多羟基醛还原浸出渣中氯化银。结果表明：控电氯化工艺最佳条件为氰化银泥与硫酸质量比5∶3，氰化银泥与氯化钠质量比5∶1，液固比3∶1，加入NaClO3控制氯化反应终电位为750 mV；浸出渣多羟基醛还原银工艺条件为氯化银与多羟基醛质量比4∶1，氯化银与碱质量比5∶3，液固比6∶1。在最佳条件下，试生产银直收率达到99 %，粗银中银品位达到99 %，指标较好。
关键词:
氰化银泥；高硒;控电氯化；多羟基醛；还原
Abstract:
According to the characteristics of cyanidation silver slime with high selenium,the silver slime was pretreated by controlled electrochlorination,and the silver chloride in the leaching residue was reduced by polyhydroxyaldehyde.The results show that the optimum conditions of controlled electrochlorination process are as follows:the mass ratio of cyanidation silver slime to sulfuric acid is 5∶3,the mass ratio of cyanidation silver slime to sodium chloride is 5∶1,the liquid-solid ratio is 3∶1,and the final potential of chlorination reaction is 750 mV by adding NaClO3;the technological conditions of silver reduction by polyhydroxyaldehyde from leaching residue are as follows:the mass ratio of silver chloride to polyhydroxyaldehyde is 4∶1,the mass ratio of silver chloride to alkali is 5∶3,and the liquid-solid ratio is 6∶1.Under the optimum conditions,the direct yield of silver is 99 %,the grade of silver in crude silver is 99 %,and the index is good.
Keywords:
cyanidation silver slime；high selenium;controlled electrochlorination;polyhydroxyaldehyde;reduction
