金三角金矿提金技术基础研究及工业应用开发
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摘要
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。
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 solution was carried out.It confirms the feasibility of the ammonia arsenic removal in theoretically.Owing to adsorption 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 passivation 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 arsenic removal-catalytic oxidation-cyanide process.The results of experiment confirmed that the leaching ratio of refractory gold mineral could reach to 85%.
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 solution was carried out.It confirms the feasibility of the ammonia arsenic removal in theoretically.Owing to adsorption 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 passivation 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 arsenic removal-catalytic oxidation-cyanide process.The results of experiment confirmed that the leaching ratio of refractory gold mineral could reach to 85%.
引文
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[2]段东平,周娥,陈思明,等.高砷硫金精矿提金研究[J].有色金属(冶炼部分),2012,(1):39-41.
[3]段东平,周娥,陈思明,等.多金属银矿湿法处理工艺实验研究[J].有色金属(冶炼部分),2012,(5):30-33.
[4]段东平,周娥,陈思明,等.湿法工艺处理多金属银矿扩大试验[J].有色金属(冶炼部分),2012,(6):40-43,53.
[5]夏光祥.难浸金矿提金新技术[M].北京:冶金工业出版社,1996:98.
[6]夏光祥,石伟,吴林荣,等.碱性催化氧化含砷难处理金矿石的理论及工艺研究[J].黄金,1996,17(2):27-33.
[7]方兆珩,夏光祥.高砷难处理金矿的提金工艺研究[J].黄金科学技术,2004,12(2):35-40.
[8]方兆珩,夏光祥,石伟,等.高砷含锑难浸金精矿提金工艺的研究[J].黄金科学技术,2001,9(3-4):28-35.
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