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Vanadium-titanium magnetite concentrate recleaning method realized through alkaline leaching, classification and combined magnetic-gravity separation

A vanadium-titanium-magnetite concentrate and magnetic-gravity combined technology, applied in chemical instruments and methods, solid separation, wet separation, etc., to achieve the effect of improving the utilization factor of blast furnaces, reducing emissions, and reducing ironmaking costs

Active Publication Date: 2014-08-06
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to overcome the deficiencies of the above-mentioned beneficiation methods, the technical problem to be solved by the present invention is to provide a low cost, high recovery quality and efficiency, simple process, and good operability to utilize alkali The method of leaching, grading, and magnetic-gravity combined re-selection of vanadium-titanium magnetite concentrate has realized efficient separation of titanium and iron in vanadium-titanium magnetite concentrate, improved the grade of iron before entering the furnace, and reduced the amount of TiO entering the blast furnace. 2 , S, Si, Al and other impurities, improve the blast furnace utilization factor, reduce the discharge of blast furnace slag, reduce the cost of ironmaking, and increase the TiO 2 Comprehensive utilization of resources to reduce environmental pollution

Method used

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  • Vanadium-titanium magnetite concentrate recleaning method realized through alkaline leaching, classification and combined magnetic-gravity separation
  • Vanadium-titanium magnetite concentrate recleaning method realized through alkaline leaching, classification and combined magnetic-gravity separation
  • Vanadium-titanium magnetite concentrate recleaning method realized through alkaline leaching, classification and combined magnetic-gravity separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 shown.

[0038] 1) Alkaline leaching

[0039] The TFe content is 52.8%, TiO 2 content of 12.5%, SiO 2 The content is 4.75%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.90% and a S content of 0.78% was placed in an 8% NaOH alkali solution, subjected to alkali leaching reaction at a temperature of 300°C for 5 hours, and the reactant was filtered to obtain the filtrate and Alkali leaching filter cake A, NaOH consumption 81kg / t is fed to ore, and described filtrate is fed into recovery treatment system, and its chemical reaction formula is:

[0040]

[0041]

[0042]

[0043]

[0044]

[0045] 2) Grading

[0046] Add water to the alkali leaching filter cake A in step 1) to form an ore slurry with a mass concentration of 20% and feed it into a cyclone for classification, and classify the grit B and overflow Y.

[0047] 3) Combined magnetic gravity beneficiation

[0048] Adding water to the sand settling B i...

Embodiment 2

[0051] Such as figure 1 shown.

[0052] 1) Alkaline leaching

[0053] The TFe content is 51.2%, TiO 2 content of 11.1%, SiO 2 The content is 4.75%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.82% and a S content of 0.81% is placed in a NaOH alkali solution with a mass concentration of 15%, and is subjected to alkali leaching reaction at a temperature of 290° C. for 4 hours, and the reactant is filtered to obtain the filtrate and Alkali leaching filter cake A, NaOH consumption 81kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0054] 2) Grading

[0055] Add water to the alkali leaching filter cake A in step 1) to form an ore slurry with a mass concentration of 21% and feed it into a cyclone for classification, and classify the grit B and overflow Y.

[0056] 3) Combined magnetic gravity beneficiation

[0057] Add water to the grit B in step 2) to make a ...

Embodiment 3

[0060] Such as figure 1 shown.

[0061] 1) Alkaline leaching

[0062] The TFe content is 50.8%, TiO 2 content of 14.5%, SiO 2 The content is 4.65%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.72% and a S content of 0.66% is placed in a NaOH alkali solution with a mass concentration of 22%, and is subjected to alkali leaching reaction at a temperature of 310° C. for 3 hours, and the reactant is filtered to obtain a filtrate and Alkali leaching filter cake A, NaOH consumption 80kg / t is fed to ore, and described filtrate is fed into recovery treatment system, and its chemical reaction formula is the same as embodiment 1.

[0063] 2) Grading

[0064] Add water to the alkali leaching filter cake A in step 1) to form an ore slurry with a mass concentration of 22% and feed it into a cyclone for classification, and classify the grit B and overflow Y.

[0065] 3) Combined magnetic gravity beneficiation

[0066] Add water to the grit B in step 2) to ...

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Abstract

The invention discloses a vanadium-titanium magnetite concentrate recleaning method realized through alkaline leaching, classification and combined magnetic-gravity separation. The method comprises the steps of placing vanadium-titanium magnetite concentrate in aqueous alkali with a mass concentration of 5%-52% for alkaline leaching reaction at a temperature between 280 DEG C and 370 DEG C for 0.5 h - 5 h and conducting filtering to obtain a filtrate and an alkaline leached filter cake A; adding water into A to form pulp with a mass concentration of 20%-25%, and feeding the pulp into a cyclone for classification to obtain effused flow and set sand B; adding water into the set sand B to obtain pulp with a mass concentration of 30%-41%, and conducting magnetic separation and gravity separation to obtain iron ore concentrate with the TFe content ranging from 63% to 68% and titanium concentrate with the TiO2 content ranging from 50% to 70%. The method has the advantages that efficient sorting of the vanadium-titanium magnetite concentrate is realized, alkali consumption is low, the content of impurities such as Al and Si entering a blast furnace is reduced, the content of detrimental impurities TiO2 and S is reduced especially, the utilization coefficient of the blast furnace is increased, blast furnace slag emission is reduced, iron-making cost is reduced, the problems of high S content and severe pollution in the smelting process are solved, and the comprehensive utilization rate of titanium resources is increased.

Description

technical field [0001] The invention relates to a beneficiation process of vanadium-titanium magnetite concentrate, in particular to a method for re-selecting vanadium-titanium magnetite concentrate by alkali leaching, classification and magnetic gravity combination. Background technique [0002] Vanadium-titanium magnetite is a compound ore of multi-metal elements, which is a symbiotic magnetite mainly containing iron, vanadium and titanium. The vanadium-titanium magnetite concentrate is one of the products obtained from vanadium-titanium magnetite through ore dressing, in which vanadium exists in the titanium magnetite in the same quality and isomorphism to replace high-valent iron ions. Titanomagnetite is the main crystal mineral (Fe 3 o 4 ) and guest crystal ore [titanium iron spar 2FeO·TiO 2 , Ilmenite FeO TiO 2 , Al-Mg spinel (Mg, Fe) (Al, Fe) 2 o 4 ] The complex formed. For example, the chemical multi-element analysis results of vanadium-titanium magnetite raw ...

Claims

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Application Information

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IPC IPC(8): B03B7/00
Inventor 郭客张志强王霆韩晓东曹新全李化刘晓明宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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