A new fine beneficiation process of magchitropite mixed iron ore

Abstract

The invention discloses a new fine mineral separation process of magnetite, hematite and siderite compound iron ore. The magnetite, hematite and siderite compound iron ore is fed into one segment of ore grinding-classification closed-loop work, a classification overflow type pump feeds the iron ore into the weak magnetic separation work, and weak magnetic separation concentrates (C1) are obtained;weak magnetic separation tailings flow into the intermediate intensity magnetic separation work automatically, and magnetic separation concentrates (C2) are obtained; intermediate intensity magneticseparation tailings flow into the strong magnetic separation work automatically, and qualified strong magnetic separation tailings are thrown away; the strong magnetic separation rough concentrates are pumped into a spiral chute to be subjected to re-selection work, and re-selection concentrates (C3) are obtained; the re-selection roughing tailings and re-selection cleaner tailings are pumped intoa negative ion reverse flotation work, and qualified reverse flotation iron concentrates (C4) are obtained; and re-selection selection middlings, reverse flotation roughing tailings and reverse flotation cleaner tailings serve as cement additive agent products to be sold. The process has the beneficial effects of being high in resource comprehensive utilization rate, small in tailing water amount, high in iron concentrate alkali ratio, simple in process flow structure (sorting work is full in open loop and free of closed loop circulation, and ore grinding work is little), small in drug consumption amount and the like, and the economic and technical effect is obvious.

Description

technical field [0001] The invention belongs to the technical field of iron ore beneficiation, and in particular relates to a beneficiation method of magchitropite mixed iron ore, which is particularly suitable for processing raw ore with a TFe grade between 40.0% and 45.0% and iron carbonate accounting for 20% of the total amount of iron minerals. Efficient and fine beneficiation of magchitropite mixed iron ore in the range of 8.0% to 15.0%. Background technique [0002] The iron-containing minerals in magchitropite mixed iron ore mainly include magnetite, semi-pseudo-hematite, pseudo-hematite, siderite, pyrite, etc.; gangue minerals mainly include carbonate minerals, chlorite Stone, kaolin, quartz, square pillar, diopside, garnet, etc. At present, the technological process used in mineral processing is to mix iron ore (broken to -12mm) and close-circuit grinding until the content of -0.076mm reaches about 65%, and then go through weak magnetic separation - strong magnetic...

AI Technical Summary

Problems solved by technology

Disadvantages are: failure to obtain concentrate in advance, large amount of regrinding of coarse concentrate, among which siderite is brittle and prone to overgrinding, which is not conducive to energy saving and consumption reduction

The disadvantages are: the process route is long, the process is complicated, and there is a large cycle in the process, which makes the production operation difficult and the efficiency of the second-stage grinding is low

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