摘要
对黄铜矿精矿进行酸性热压氧化提铜工艺研究 ,探讨了初始酸浓度、浸出温度、浸出时间等工艺参数对铜浸出率的影响。结果表明 :最佳浸出温度为 110～ 115℃ ;初始酸度和NaCl浓度增加、氧分压提高、反应时间延长可以提高Cu的浸出率。当氧气分压 0 .45MPa ,浸出温度 110℃ ,浸出时间 4h ,NaCl初始浓度为 40g L ,H2 SO4初始浓度为 110g L ,液固比 5∶1,搅拌速度 75 0r min时 ,Cu的浸出率可达 98%。在液固比为 4∶1,氰化钠用量为 2kg t ,氰化时间 2 4h ,振荡氰化条件下 ,金的浸出率为 85 %。
The paper deals with copper extraction from chalcopyrite concentrate by acidic hot-pressure oxidation. The authors discuss the influence of such technical parameters as initial acid concentration, leaching temperature and leaching time etc, on copper leaching rate. The results have shown that the optimum leaching temperature ranges from 110 ℃ to 115 ℃. The leaching rate of copper can be increased by increasing initial acidity, concentration of NaCl, partial pressure of oxygen and reaction time. When the partial pressure of oxygen is 0.45 MPa, the temperature is 110 ℃, the leaching time is 4 h, the initial concentration of NaCl is 40 g/L, the initial concemtration of H 2SO 4 is 110 g/L, the L/S ratio is 5 and the agitation velocity is 750 r/min and the leaching rate of copper is up to 98%. Under oscillating cyanidation condition and at L/S ratio of 4, sodium cyanide dosage of 2 kg/t and cyanidation time of 24 h, the leaching rate of gold is 85%.
出处
《矿冶工程》
CAS
CSCD
北大核心
2003年第4期54-56,59,共4页
Mining and Metallurgical Engineering
基金
国家科技攻关计划课题 (2 0 0 1BA60 9A - 1 7)
