中国科技核心期刊
美国化学文摘社（CAS）数据库
美国EBSCO学术数据库
日本科学技术振兴机构数据库(JST)
某碳质金精矿富氧焙烧—氯化浸出试验研究
- 作者：
- 杨凤云
- 作者单位：
- is null
基金项目：
- isnull
详细信息：
- 作者简介：
- 杨凤云（1987—），女，河南新乡人，工程师，从事岩矿分析工作；河北省廊坊市廊万路9号，廊坊市中铁物探勘察有限公司，065000；E-mail：yfy1236@126.com
- 通讯作者：
- isnull
- 此文档没有上传！
Experimental research on oxygen-enriched roasting-chlorination leaching process of a carbonaceous gold concentrate
- English Author：
- Langfang China Railway Geophysical Exploration Co.,Ltd.
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
某碳质金精矿直接氰化浸出金浸出率很低，小于30 %，为进一步提高金浸出率，针对碳质金精矿性质，进行了富氧焙烧—氯化浸出试验研究。结果表明：与常规氧化焙烧相比，富氧焙烧降低了焙烧温度，缩短了焙烧时间；富氧焙烧最佳焙烧温度550 ℃～600 ℃，氧气体积分数50 %，焙烧时间2.0 h，在此条件下，碳、硫去除率均在95 %以上；焙砂采用M-NaCl氯化浸出，在最佳浸出条件为固液比1∶6，浸液pH=3，浸出剂用量8 kg/t，试样粒度62~75 μm，浸出时间4 h时，金浸出率可达92.50 %，相对于试样直接氯化浸出时有显著提高；表明富氧焙烧—氯化浸出工艺是可行的。
关键词:
碳质金精矿；富氧焙烧；氯化浸出；有机氯化剂；氯化钠
Abstract:
Since direct cyanide leaching of a carbonaceous gold concentrate has a very low leaching rate,which is lower than 30 %,experimental study was carried on oxygen-enriched roasting-chlorination leaching of a carbonaceous gold concentrate to improve gold leaching rate.The results showed that compared with conventional oxidation roasting,oxygen-enriched roasting not only could reduce the roasting temperature,but also could shorten the roasting time; when the optimum oxygen-enriched roasting temperature is 550 ℃-600 ℃,the optimum oxygen volume fraction is 50 %,and the optimum roasting time is 2.0 h,both the deprivation rate of carbon and sulfur is over 95 % in the optimum conditions.The calcine is chlorinated in M-NaCl.The results proved that the extraction rate of gold could reach 92.50 %,when the optimum leaching conditions were:the solid-liquid ratio was 1∶6,the lixivium pH was 3,amount of leaching agent was 8 kg/t,test sample particle size was 62-75 μm and the leaching time was 4 hours,when the test sample was directly subjected to chlorination leaching.The process of oxygen-enriched roasting-chlorination leaching is feasible.
Keywords:
carbonaceous gold concentrate;oxygen-enriched roasting;chlorination leaching;organic chlorinating agent;NaCl
