黄金科学技术
黃金科學技術
황금과학기술
GOLD SCIENCE AND TECHNOLOGY
2013年
1期
65-70
,共6页
含砷金矿%催化氧化%雌黄%雄黄转化%氨水脱砷
含砷金礦%催化氧化%雌黃%雄黃轉化%氨水脫砷
함신금광%최화양화%자황%웅황전화%안수탈신
Arsenic gold mine%Catalytic oxidation%Orpiment%Transformation of realgar%Ammonia arsenic removal
全面介绍了我国的2个金三角黄金资源的基本情况,针对2个金三角所产的难冶金矿中砷化合物一般为雄黄和雌黄的特点,详细分析了雄黄和雌黄在氨水中的转化及溶解的机理,从理论上验证了氨法脱砷的可行性.在氨法脱砷过程中,由于溶解于氨水中的雌黄可能会在矿石微粒上吸附,从而形成一层钝化层影响到后续金的氰化过程.因此,必须对脱砷后的金矿进行活化以去除表面钝化膜.Cu2+的加入不仅有利于雌黄钝化膜的脱除,还能显著地提高预处理后金矿中金的浸出率.运用该方法,研究者们对于甘肃坪定金矿、贵州丹寨和东北寨金矿所产难处理金矿进行了氨法脱砷—催化氧化活化—氰化提金扩大实验研究,实验结果表明金的浸出率都在85%以上,与小试所得结果一致.
全麵介紹瞭我國的2箇金三角黃金資源的基本情況,針對2箇金三角所產的難冶金礦中砷化閤物一般為雄黃和雌黃的特點,詳細分析瞭雄黃和雌黃在氨水中的轉化及溶解的機理,從理論上驗證瞭氨法脫砷的可行性.在氨法脫砷過程中,由于溶解于氨水中的雌黃可能會在礦石微粒上吸附,從而形成一層鈍化層影響到後續金的氰化過程.因此,必鬚對脫砷後的金礦進行活化以去除錶麵鈍化膜.Cu2+的加入不僅有利于雌黃鈍化膜的脫除,還能顯著地提高預處理後金礦中金的浸齣率.運用該方法,研究者們對于甘肅坪定金礦、貴州丹寨和東北寨金礦所產難處理金礦進行瞭氨法脫砷—催化氧化活化—氰化提金擴大實驗研究,實驗結果錶明金的浸齣率都在85%以上,與小試所得結果一緻.
전면개소료아국적2개금삼각황금자원적기본정황,침대2개금삼각소산적난야금광중신화합물일반위웅황화자황적특점,상세분석료웅황화자황재안수중적전화급용해적궤리,종이론상험증료안법탈신적가행성.재안법탈신과정중,유우용해우안수중적자황가능회재광석미립상흡부,종이형성일층둔화층영향도후속금적청화과정.인차,필수대탈신후적금광진행활화이거제표면둔화막.Cu2+적가입불부유리우자황둔화막적탈제,환능현저지제고예처리후금광중금적침출솔.운용해방법,연구자문대우감숙평정금광、귀주단채화동북채금광소산난처리금광진행료안법탈신—최화양화활화—청화제금확대실험연구,실험결과표명금적침출솔도재85%이상,여소시소득결과일치.
A comprehensive introduction to the basic characteristics of the tew golden triangles of gold resources was given in this paper.The golden ores from the two golden triangles of gold resources are consisted of orpiment and realgar.Detailed analysis of the mechanism of realgar transformation and orpiment dissolution in ammonia so-lution was carried out.It confirms the feasibility of the ammonia arsenic removal in theoretically.Owing to adsorp-tion of orpiment on the surface of ore particle and formation of a passivation layer which affected subsequent gold-cyanide process in the process of ammonia arsenic removal,it’s necessary to activate the dearsenication gold mine to remove passivation films on their surfaces.The addition of Cu2+ion not only impels the removal of orpiment pas-sivation film but also inproves the leaching ration of gold.Amplified experiment of refractory gold ores from Pingding,Gansu province,Danzai and Dongbeizai,Guizhou province were carried out by using such ammonia ar-senic removal- catalytic oxidation-cyanide process.The results of experiment confirmed that the leaching ratio of refractory gold mineral could reach to 85%.
