脂类捕收剂DLZ对黄铜矿和黄铁矿浮选的选择性作用

通过浮选实验、吸附量和红外光谱测定,考察了捕收剂DLZ对黄铜矿和黄铁矿浮选性能的影响及作用机理.结果表明:DLZ在pH=2.7～12.05时对黄铜矿的捕收能力强,最大回收率95.7%,而对黄铁矿的捕收能力弱,且PH=6.9～12.05时其回收率小于10%.用CaO作pH调整剂时,在pH=7～11时黄铜矿的回收率与用NaOH调PH相差不大,但黄铁矿可浮性被抑制,回收率低于5%.DLZ在黄铜矿上的吸附量比在黄铁矿上的大,特别是强碱条件下;其吸附量随用量的增加而增大.DLZ与矿物作用的红外光谱分析表明:黄铜矿与DLZ作用后出现了DLZ的相关特征吸收峰,而黄铁矿与DLZ以及Cu~(2+)作用前后的红外光谱曲线基本没有变化,可见DLZ在黄铜矿表面的吸附属于化学吸附,在黄铁矿表面的吸附属于物理吸附.     

矿山固体废物综合利用的几种途径

论述我国矿山固体废物的来源及危害,着重介绍矿山固体废物综合利用的几种途径,并分析了矿山固体废物综合利用中存在的问题及建议.     

Effects of microorganisms on surface properties of chalcopyrite and bioleaching

The alteration of surface properties of chalcopyrite after biological conditioning with Acidithiobacillusferrooxidans and Acidithiobacillus caldus was evaluated by Zeta-potential, adsorption studies, FT-IR spectra and contact angle measurement. The Zeta-potential studies show that the iso-electric point（IEP） of chalcopyrite after bacterial treatment moves towards the IEP of pure cells, indicating the adsorption of cells on chalcopyrite surface. The FT-IR spectra of chalcopyrite treated with bacterial cells show the presence of the cell functional groups signifying cells adsorption. Due to the formation of elemental sulfur and intermediate copper sulphides on chalcopyrite surface, the contact angle and surface hydrophohicity of chalcopyrite increase at the initial bioleaching stage. Chalcopyrite bioleaching by Acidithiobacillus ferrooxidans has higher copper extraction, which agrees with the fact that Acidithiobacillus ferrooxidans adsorbed on chalcopyrite surface is much more than Acidithiobacillus caldus. The results support the direct mechanism of sulfide oxidations in bioleaching chalcopyrite.     

浅论我国尾矿处理新技术的现状及发展

分析了传统的尾矿地表堆存方法存在的环保、安全问题,介绍了尾矿干式堆存和尾矿井下充填采空区等尾矿处理新技术的研究及应用进展.随着尾矿库安全及环保要求的日益严格,高效、安全、环境友好的尾矿处理方法将逐步取代传统的尾矿地表堆存方法.     

广东某铅锌多金属矿选矿厂设计实践

根据矿石性质及矿山设计规模,参照同类型矿山生产实践对广东某铅锌多金属矿进行选矿厂设计.详细介绍了各工序的设计内容,并进行方案比较,最终选择合理的工艺流程及设计方案.