铜陵硫酸渣磁化焙烧—磁选过程中铜、金、银赋存状态的变化

The Transition of Occurrence of Copper,Gold and Silver in Tongling Pyrite Cinder During Magnetic Roasting and Separation

铜陵硫酸渣中的铜以铜蓝、黄铜矿以及合成矿物亚铁酸铜和亚铁酸亚铜存在 ,铜蓝和黄铜矿在磁化焙烧 -磁选过程中有一部分被氧化成合成矿物亚铁酸铜和亚铁酸亚铜 ,铜矿物在铁精矿中有所富集。铜陵硫酸渣中的金以含银自然金、银金矿存在 ;而银则以自然银、辉银矿存在 ,金、银矿物的赋存状态在磁化焙烧 -磁选过程中没有变化 。

The copper in pyrite cinder occurred in the form of covellite,chalcopyrite or tenorite (cupric ferrite) and cuprous ferrite.Some covellite and chalcopyrite are oxidized into cupric ferrite and cuprous ferrite during magnetic roasting and separation,the copper in pyrite cinder is collected into the iron concentrate.The gold in pyrite cinder occurred in the form of silver bearing natural gold and eletrum.The silver in pryite cinder occurred in the form of natural silver and argentite.The occurrence of the gold and silver in pryite cinder do not change during magnetic roasting and separation,but the gold and silver in pyrite cinder is accumulated in the tailings.