湿法冶金
濕法冶金
습법야금
HYDROMETALLURGY OF CHINA
2013年
6期
349-352
,共4页
含铜金精矿%加压氧化%氰化浸出%金
含銅金精礦%加壓氧化%氰化浸齣%金
함동금정광%가압양화%청화침출%금
copper-bearing gold concentrate%pressure oxidation%cyanide leaching%gold
某含铜金精矿难于处理，金呈亚显微形式存在。研究了采用热压预氧化法脱铜，氧化渣氰化浸出金，考察了温度、压力、矿浆浓度、搅拌强度和预氧化时间对氧化脱铜的影响。试验结果表明：在温度210℃、氧分压1．1 M Pa、液固质量比5∶1、搅拌强度700 r/min、预氧化时间70 min条件下，铜脱除率大于98％；氧化脱铜渣浆用石灰调pH为1011，用质量浓度为1 g/L的NaCN浸出金，金浸出率大于98％。
某含銅金精礦難于處理，金呈亞顯微形式存在。研究瞭採用熱壓預氧化法脫銅，氧化渣氰化浸齣金，攷察瞭溫度、壓力、礦漿濃度、攪拌彊度和預氧化時間對氧化脫銅的影響。試驗結果錶明：在溫度210℃、氧分壓1．1 M Pa、液固質量比5∶1、攪拌彊度700 r/min、預氧化時間70 min條件下，銅脫除率大于98％；氧化脫銅渣漿用石灰調pH為1011，用質量濃度為1 g/L的NaCN浸齣金，金浸齣率大于98％。
모함동금정광난우처리，금정아현미형식존재。연구료채용열압예양화법탈동，양화사청화침출금，고찰료온도、압력、광장농도、교반강도화예양화시간대양화탈동적영향。시험결과표명：재온도210℃、양분압1．1 M Pa、액고질량비5∶1、교반강도700 r/min、예양화시간70 min조건하，동탈제솔대우98％；양화탈동사장용석회조pH위1011，용질량농도위1 g/L적NaCN침출금，금침출솔대우98％。
A gold concentrate containing copper is refractory .Most of gold exists in the form of submic roscopic gold .Conventional cyanidation leaching rate of gold in the concentrate is lower than 20% . Removal of copper by pressure oxidation at heating and leaching of gold by cyanidation was studied . The effects of temperature ,oxygen pressure ,the mass ratio between liquid and solid ,stirring speed and time on the removal rate of copper were examined .The results show that at the conditions of temperature of 210 ℃ ,oxygen pressure of 1 .1 MPa ,the mass ratio between liquid and solid of 5∶1 , stirring speed of 700 r/min and preoxidation time of 70 minutes ,the removal rate of copper is more than 98% .The oxidizing slag slurry’s pH is adjusted in the range of 10-11 using lime ,then to leach gold using sodium cyanide solutin of 1 g/L ,the leaching rate of gold is more than 98% .
