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含金氧化渣漿泵礦石的特點是什么?
含金氧化礦石明顯地與硫化礦不同，氧化礦一般距離地表10~30m的范圍，儲量不大，礦體比較分散。由于礦物和金粒表面蝕變、氧化和污染，使其失去原來的可浮性。另一方面，由于微細(xì)粒礦泥(原生礦泥和次生礦泥)含量大，微細(xì)粒礦物質(zhì)量小，比表面大，表面能亦大，使得水介質(zhì)對這些微細(xì)粒礦物和礦泥的動阻力、各種界面力、雙電層斥力等的影響愈益顯著，布朗運動的擴散行為的影響遠(yuǎn)遠(yuǎn)超過重力的作用，使得它們與氣泡碰撞黏附的概率降低，泡沫發(fā)黏，比浮選速度小;有時大量礦泥進入精礦，造成金精礦品位過低。此外，礦泥和微細(xì)礦粒還吸附浮選藥劑和顯微、次顯微金。這些都導(dǎo)致浮選過程的復(fù)雜化，增加生產(chǎn)成本，降低選礦回收率。所以，直接采用浮選法處理含金氧化礦.金的浮選回收率一般只有60%左右，精礦品位也不高，甚至達(dá)不到金精礦標(biāo)準(zhǔn)。如果采用混汞-重選工藝流程處理，金的回收率也只能達(dá)到60%~70%，同時，重選尾礦再進行氰化，渣漿泵廠家回收率雖然能夠大幅度提高，但工藝流程復(fù)雜，環(huán)保問題也難以解決，對于中小型黃金企業(yè)來說，經(jīng)濟上也不合算。
What are the characteristics of gold bearing oxidized slag slurry pump ore?
The gold bearing oxidized ore is obviously different from the sulfide ore. generally, the oxidized ore is 10-30m away from the surface, with small reserves and relatively scattered ore bodies. Due to the alteration, oxidation and pollution of the surface of minerals and gold particles, they lose their original floatability. On the other hand, the influence of water medium on the dynamic resistance, various interface forces and double electric layer repulsion of these fine-grained minerals and slimes is more significant because of the large content of fine-grained slimes (primary slimes and secondary slimes), the small quality of fine-grained minerals, the large specific surface energy and the large surface energy. The diffusion behavior of Brownian motion far exceeds the effect of gravity, making them and bubbles The probability of collision adhesion decreases, foam viscosity is smaller than flotation rate. Sometimes a large amount of ore mud enters the concentrate, resulting in low grade of gold concentrate. In addition, slime and fine ore particles also adsorb flotation reagents, micro and sub micro gold. All of these lead to the complexity of flotation process, increase of production cost and decrease of beneficiation recovery. Therefore, the flotation recovery rate of gold is only about 60%, and the concentrate grade is not high, even can not reach the gold concentrate standard. If the process of mixing and gravity separation is adopted, the recovery rate of gold can only reach 60% ~ 70%. At the same time, if the tailings of gravity separation are cyanidated again, the recovery rate of slurry pump manufacturer can be greatly improved, but the process flow is complex, and the environmental protection problem can not be solved. For small and medium-sized gold enterprises, it is not economical.
