Benefication technology of extra poor hematite
A technology of iron ore and process, which is applied in the field of sorting technology of extremely poor hematite ore, can solve the problems of increasing the processing capacity of regrinding operations, low grade of selection, poor sorting index, etc., so as to reduce investment cost and operation cost, reduce the amount of regrinding, and improve the effect of selecting other indicators
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[0025] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.
[0026] Such as figure 1 Shown, the sorting process of extremely poor hematite ore of the present invention is characterized in that, it is characterized in that comprising the following steps:
[0027] 1) Raw ore 1 is fed into a ball mill for grinding,
[0028] 2) The grinding product of the primary ball mill is fed into the primary spiral classifier for primary classification, and the closed-circuit grinding system composed of the primary ball mill and the spiral classifier 2,
[0029] 3) The overflow of the primary spiral classifier 2 with a concentration of 45-50%, a particle size of -200 mesh, a content of 60-70%, and a grade lower than 15-25% is fed into the weak magnetic separator 3, and the weak magnetic The weak magnetic tailings separated by the separator 3 are concentrated to a concentration of 35-45%, and the weak magnetic tai...
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