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A hematite and high-sulfur technology, applied in flotation, magnetic separation, solid separation, etc., can solve the problems of no specific examples, and achieve the effects of reducing the amount of chemicals, reducing the cost of chemicals, and low sulfur content
Active Publication Date: 2012-07-11
ANSTEEL GRP MINING CO LTD
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Problems solved by technology
[0005] At present, in the beneficiation process of high-sulfur hematite, it is necessary to reduce both silicon and sulfur while increasing iron, and there is no specific example for the time being
Method used
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Embodiment 1
[0027] 1) Feed the high-sulfur hematite raw ore with a grade of 30.5% into the second-stage continuous ball mill, screen,
[0028] 2) The discharge ore with a particle size of -200 mesh and a content of more than 90% is fed with a weak magnetic field, and the tailings with a weak magnetic field are fed with a strong magnetic field.
[0029] 3) The weak magnetic concentrate and the strong magnetic concentrate were combined to obtain an iron grade of 45.30%, a sulfur content of 0.85%, and SiO 2 The rough concentrate with a content of 26.82% is put into the anion reverse flotation roughing together, and the desulfurization agent butyl xanthate 80-100g / t, the pH regulator NaOH 950-1150g / t, the inhibitor DF 450-800g / t , activator CaO 320-420g / t, collector 600-1000g / t,
[0030] 4) The concentrate obtained by anion reverse flotation roughing is fed into anion reverse flotation concentration, and collector 300-500g / t is added, and the tailings of anion reverse flotation concentration...
Embodiment 2
[0034] 1) Feed the high-sulfur hematite raw ore with a grade of 33% into the second-stage continuous ball mill, screen,
[0035] 2) The discharge ore with a particle size of -200 mesh and a content of more than 90% is fed with a weak magnetic field, and the tailings with a weak magnetic field are fed with a strong magnetic field.
[0036] 3) The weak magnetic concentrate and the strong magnetic concentrate were combined to obtain an iron grade of 47.30%, a sulfur content of 1.0%, and SiO 2 The rough concentrate with a content of 25.42% is fed into the anion reverse flotation roughing together, and the desulfurization agent butyl xanthate 80-100g / t, the pH regulator NaOH 950-1150g / t, the inhibitor DF 450-800g / t , activator CaO 320-420g / t, collector 600-1000g / t,
[0037]4) The concentrate obtained by anion reverse flotation roughing is fed into anion reverse flotation concentration, and collector 300-500g / t is added, and the tailings of anion reverse flotation concentration and...
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Abstract
Provided is a beneficiation process for high-sulfur hematite, which is characterized in that two-section continuous ball-milling and screening are performed on the raw ore, magnetic separation is performed on the discharged ore, anion reverse flotation roughing is performed on magnetic-separated concentrate, anion reverse flotation agents are added, anion reverse flotation choiceness is performed on anion reverse flotation roughing concentrate, anion reverse flotation choiceness tailings are combined with anion reverse flotation roughing tailings and then are subjected to anions reverse flotation scavenging, cation reverse flotation roughing is performed on anion reverse flotation scavenging concentrate, collector dodecylamine is added, cation reverse flotation choiceness is performed on cation reverse flotation roughing concentrate, collector dodecylamine is added, cation reverse flotation choiceness concentrate and anion reverse flotation choiceness concentrate are combined into final iron ore concentrate, and anion reverse flotation scavenging tailings, cation reverse flotation roughing tailings, cation reverse flotation choiceness tailings and strong magnetic tailings are finally combined into final tailings. The beneficiation process for high-sulfur hematite improves content of iron, reduces content of silicone and sulfur and provides high-quality iron ore concentrate for steelmaking production and is suitable for beneficiation of high-sulfur magnetite.
Description
technical field [0001] The invention relates to the technical field of beneficiation, in particular to a high-sulfur hematite ore beneficiation process. Background technique [0002] With the rapid development of the iron and steel industry, the demand for iron ore is increasing year by year. Compared with the iron ore resources in the world, the total amount of iron ore resources in my country is relatively large, but the quality of iron ore is poor, the structure is complex, the embedded particle size is fine, and the iron ore resources are relatively large. The variety of minerals is not single, and the content of rich ore is small. 97.5% of the ore needs to be processed before it can be used. At present, hematite ore with a mass fraction of sulfur greater than 0.3 is called high-sulfur hematite. High-sulfur hematite will emit sulfur dioxide gas to pollute the atmosphere during steelmaking. At the same time, too much sulfur in the steel will make the steel brittle. Th...
Claims
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