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Method for recleaning vanadium titanium magnetite concentrate by using alkaline leaching and desliming

A vanadium-titanium magnetite concentrate and alkali leaching technology, which is applied in the field of alkali leaching, desliming and re-selection of vanadium-titanium magnetite concentrate, to achieve the effects of reducing emissions, improving blast furnace utilization coefficient, and improving comprehensive utilization

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

[0012] 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 use alkali on the basis of an effective combination of physical and chemical beneficiation methods. The method of leaching, desliming and re-selecting the vanadium-titanium magnetite concentrate has realized the efficient separation of titanium and iron in the vanadium-titanium magnetite concentrate, improved the iron grade before entering the furnace, and reduced the TiO2 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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  • Method for recleaning vanadium titanium magnetite concentrate by using alkaline leaching and desliming
  • Method for recleaning vanadium titanium magnetite concentrate by using alkaline leaching and desliming
  • Method for recleaning vanadium titanium magnetite concentrate by using alkaline leaching and desliming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Alkaline leaching

[0030] The TFe content is 53.1%, TiO 2 content of 11.2%, SiO 2 The content is 3.45%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.13% and a S content of 0.65% is placed in a NaOH alkali solution with a mass concentration of 20%, and is subjected to alkali leaching reaction at a temperature of 280° C. for 4 hours, and the reactant is filtered to obtain a 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:

[0031]

[0032] 2) Desliming

[0033] Add water to the alkali leaching filter cake A in step 1) to prepare a mass concentration of 24% ore slurry and feed it into a ∮ 3.0 m desliming hopper for desliming operation to obtain grit B and overflow C; the grit B It is the final iron concentrate (SiO 2 The content is 1.50%, Al 2 o 3 content is 1.65%, S content is 0.02%), the overflow C ...

Embodiment 2

[0035] 1) Alkaline leaching

[0036] The TFe content is 52.6%, TiO 2 content of 12.4%, SiO 2 The content is 3.62%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 5.55% and a S content of 0.78% is placed in a NaOH alkali solution with a mass concentration of 10%, and is subjected to alkali leaching reaction at a temperature of 370° C. for 5 hours, and the reactant is filtered to obtain the filtrate and Alkali leaching filter cake A, NaOH consumption 95kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0037] 2) Desliming

[0038] Add water to the alkali leaching filter cake A in step 1) to prepare a mass concentration of 23% ore slurry and feed it into a ∮5.0m desliming hopper for desliming operation to obtain grit B and overflow C; the grit B It is the final iron concentrate (SiO 2 The content is 0.53%, Al 2 o 3 content is 1.24%, S content is 0.02%), the overf...

Embodiment 3

[0040] 1) Alkaline leaching

[0041] The TFe content is 53.2%, TiO 2 content of 12.7%, SiO 2 The content is 4.18%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 5.52% and a S content of 0.72% is placed in a NaOH alkali solution with a mass concentration of 35%, and is subjected to alkali leaching reaction at a temperature of 280° C. for 3 hours, and the reactant is filtered to obtain the filtrate and Alkali leaching filter cake A, NaOH consumption 86kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0042] 2) Desliming

[0043] Add water to the alkali leaching filter cake A in step 1) to prepare a mass concentration of 25% ore slurry and feed it into a desliming hopper of ∮ 5.0 meters for desliming operation to obtain grit B and overflow C; the grit B It is the final iron concentrate with TFe content of 62.5% (SiO 2 The content is 0.66%, Al 2 o 3 content is 1...

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Abstract

The invention discloses a method for recleaning vanadium titanium magnetite concentrate by using alkaline leaching and desliming. The method comprises the following steps: placing vanadium titanium magnetite concentrate into an alkaline solution with the mass concentration of 5-52%, performing alkaline leaching reaction for 0.5-5 hours at the temperature of 260-370 DEG C, and filtering to obtain a filtrate and an alkaline-leached filter cake A; adding water to the A to prepare A to ore slurry with the mass concentration of 21-15 % for performing desliming operation so as to obtain a sand setting B and an overflow C, wherein the sand setting B is a final iron concentrate with the TFe content of 60-68%, and the overflow C is a final titanium concentrate with the TiO2 content of 40-50%. The method has the advantages that the efficient separating of the vanadium titanium magnetite concentrate is realized; the alkali consumption is low; the contents of impurities such as Al and entering a blast furnace can be reduced, in particular the contents of harmful impurities such as TiO2 and S; the blast furnace utilization coefficient is increased; the blast furnace slag discharge capacity is reduced; the ironmaking cost is reduced; the problems of high S content and serious pollution in the smelting process can be solved; meanwhile, the comprehensive utilization of a titanium resource is improved.

Description

technical field [0001] The invention relates to a beneficiation process of vanadium-titanium magnetite concentrate, in particular to a method of utilizing alkali leaching, desliming and then selecting vanadium-titanium magnetite concentrate. 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 ore and vanadium-titanium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/12C22B3/22C22B34/12
Inventor 余自甦刘晓明郭客刘政东陈巍全名威王忠红宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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