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河北省内邱县硫铁矿下部矿石以磁黄铁矿为主,其次是磁铁矿和少量黄铁矿、黄铜矿。脉石矿物有石英、黑云母、角闪石、石榴子石、方解石、蛇纹石等。为该选矿厂扩建设计提供依据,我们采用了阶段磨矿的浮一磁—浮联合流程进行选别,添加常规药剂硫酸、丁基黄药、二号油,就可获得硫精矿品位34.44%,收率96.85%的好指标。原矿18.62%。通过浮选条件试验,证明硫酸不仅是介质的调整剂,也是浮选磁黄铁矿的良好活化剂。磁黄铁矿是易氧化的矿物,硫酸可以溶去磁黄铁矿表面的氧化膜或洗去表面的污染物,从而提高了磁黄铁矿的可浮性。黄药在水中易解离,pH值越低,分解越迅速。为了防止分解失效,黄药常在碱性矿浆中使用。低级黄药比高级黄药分解快,在酸性介质中用丁基黄药浮选磁黄铁矿效果很好。二号油
The ore in the lower part of Qiu County pyrite in Hebei Province is pyrrhotite, followed by magnetite and a small amount of pyrite and chalcopyrite. Gangue minerals are quartz, biotite, hornblend, garnet, calcite, serpentine and so on. In order to provide the basis for the expansion design of this concentrator, we adopted the floatation-magnetism-floatation combined process of stage grinding and sorting. Add the conventional reagent sulfuric acid, butyl xanthate and No. 2 oil to obtain 34.44% , A good yield of 96.85%. Raw ore 18.62%. Through the flotation test, it is proved that sulfuric acid is not only a mediator of the medium, but also a good activator of flotation pyrrhotite. Pyrrhotite is an easily oxidizable mineral. Sulfuric acid can dissolve the oxide film on the surface of pyrrhotite or wash away contaminants on the surface, thereby improving the floatability of pyrrhotite. Xanthate easy to dissociate in water, the lower the pH, the more rapid decomposition. In order to prevent decomposition failure, xanthate often used in alkaline slurry. Low-grade xanthate faster decomposition of high-grade xanthate, in the acidic medium with butyl xanthate flotation pyrrhotic good effect. Second oil