Mineralogy iron sphalerite complex, often associated with a variety of precious metals is present, since the alternative marmatite worse than sphalerite, which integrated for recovering the mineral brings certain obstacles, different mines The type, iron content, floatability and sorting degree of iron sphalerite are different, which will have an impact on the normal selection of iron sphalerite.
In the beneficiation industry, we have made the minerals containing more than 6% iron in sphalerite become iron sphalerite, and the amount of iron depends on the formation and nature of the deposit, the magnetic strength of iron sphalerite and iron. The content is proportional, the higher the iron content, the stronger the magnetic properties. Generally, when the magnetic separation intensity is 0.2-0.3T, the iron sphalerite can directly enter the high magnetic product. Therefore, in the selection of zinc concentrate, it must first be magnetically selected, which is also equivalent to impurity removal, but what is removed here is iron iron zinc ore with higher iron content. A pre-process test lead zinc processing plant analysis, the amount of iron in iron sphalerite 6.81-15.09%, after passing through the high magnetic iron separable selected sphalerite and other magnetic materials, the zinc concentrate The grade increased by 3.89% and the recovery rate reached 98.8%.
Then the main point that influences the selection process is that the zinc atom on the crystal lattice is replaced by trivalent iron ions, which makes the valence and charge state unbalanced, reduces the hole concentration, and makes the sphalerite into an N-type semiconductor mineral iron flash zinc. The mineral, which affects its floatability, is not conducive to the adsorption of the collector due to the increase of electron density. Therefore, the higher the iron content, the more the lattice parameter increases and the crystal surface energy decreases, the ionic bond in the lattice, The greater the change in peninsula, etc., the worse the floatability.
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