Desulfuration method for high sulfide pyrite powder

A technology of iron ore powder and high sulfur, applied in chemical instruments and methods, improvement of process efficiency, flotation, etc., to achieve low cost, high benefit, and environmental friendliness

Active Publication Date: 2008-04-09
CHANGSHA RES INST OF MINING & METALLURGY +1
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  • Desulfuration method for high sulfide pyrite powder

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[0011] Example: The beneficiation tailings of a certain lead-zinc ore contain magnetite and a large amount of suppressed pyrrhotite. Through weak magnetic separation, a mixed concentrate of magnetite and pyrrhotite is obtained. The concentrate contains iron It is 57.13%, while the sulfur content is as high as 16.28%. Add 750g / t of sulfuric acid at a concentration of 50% of the pulp, adjust the pulp for 5 minutes, then add 50g / t of butyl xanthate and 30g / t of 2# oil, and float out easily sulfide minerals, namely sulfur concentrate 1; Under the condition of a magnetic field strength of 500 Oersted, the magnetite concentrate 1 was obtained; the magnetic separation tailings were added with humic acid 2000g / t to disperse the pulp, and then added 100g / t butyl xanthate and 50g / t 2# oil, the flotation was difficult Float the pyrrhotite to get the second sulfur concentrate, and then enter the magnetic separation with the flotation tailings. The magnetic field strength is 1000 Oersted t...

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Abstract

The invention relates to the desulfurizing method of high-sulphur iron ore power, in particular to the iron ore power recycled by using sulfurous iron ore, pyrites and floatation gangue. When the content of sulphur of the iron ore concentrate, which is mostly magnetite, reaches over 15 percent, by adopting the principle of asynchronous size classification, the iron ore concentrate can reach over 65 percent, wherein the content of sulphur is reduced to less than 0.3 percent, and the rate of desulphurization reaches more than 90 percent. The method has the advantages of the simple system of medicament, slight acid-causticity for equipment, and low cost of operation.

Description

technical field [0001] The invention relates to a method for desulfurizing high-sulfur iron ore powder, in particular to a method for desulfurizing iron concentrate with a sulfur content as high as 15%. Background technique [0002] Sulfur can cause hot brittleness of steel and cause steel to break when forging and rolling at high temperature, so the sulfur content in steel should generally not exceed 0.05%. This requires that the sulfur in the iron concentrate for steelmaking should not be too high. [0003] At present, in the desulfurization method of high-sulfur iron ore, the iron ore mainly composed of pyrite and containing less than 5% sulfur is treated by physical beneficiation, biometallurgy and fire method, and the sulfur content can be reduced to 0.3 %the following. However, for iron ore mainly composed of pyrrhotite, since the magnetic difference between pyrrhotite and magnetite is small, and they enter the magnetite concentrate together, the sulfur content in th...

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Application Information

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IPC IPC(8): C22B1/11C22B3/08B03D1/00B03C1/02B03D1/001B03D1/02
CPCY02P10/20
Inventor 石云良苏目清
Owner CHANGSHA RES INST OF MINING & METALLURGY
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