摘要
以焙砂为原料,对熔盐挥发的氯化挥发时间、熔融时间、氧气供应量、氯化添加剂量和氯化剂添加方式进行试验研究。结果表明,在分批加入8%氯化钙、氧气通入量为3m3/h、融化电压约410V、融化电流约40A、熔融温度1 200℃、熔融后保持电流约20A的条件下,金的挥发率稳定在97%以上。并提出一种短流程无氰提金新工艺。
A test of molten salt chlorination was performed on gold-bearing calcine and effects of volatilization time, melting time, oxygen supply rate, chloride addition and adding mode on gold volatilization rate were investigated. The results show that gold volatilization rate is 97% above under the optimum conditions including CaCl2 addition of 8%, oxygen flowrate of 3 m3/h, melting voltage of ～410 V, melting current of ～40 A, melting temperature of 1 200 ℃, and holding current after melting of ～20 A. A new short route cyanide-free gold extraction process is proposed.
出处
《有色金属（冶炼部分）》
CAS
北大核心
2016年第3期40-43,共4页
Nonferrous Metals（Extractive Metallurgy)
基金
国家高技术研究发展计划(863计划)项目(2011AA06A104)
关键词
难处理金矿
短流程
无氰
熔盐
氯化挥发
refractory gold ore
short process
cyanide-free
molten salt
chloride volatilization
