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Method for re-selecting vanadium titanomagnetite concentrate by alkali leaching, desliming and gravity separation

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

Active Publication Date: 2016-07-06
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, desliming, gravity separation and re-selection of vanadium-titanium magnetite concentrate realizes the efficient separation of titanium and iron in vanadium-titanium magnetite concentrate, improves the iron grade before entering the furnace, and reduces the TiO entering into 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 re-selecting vanadium titanomagnetite concentrate by alkali leaching, desliming and gravity separation
  • Method for re-selecting vanadium titanomagnetite concentrate by alkali leaching, desliming and gravity separation
  • Method for re-selecting vanadium titanomagnetite concentrate by alkali leaching, desliming and gravity separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Alkaline leaching

[0034] The TFe content is 50.1%, TiO 2 content of 14.8%, SiO 2 The content is 3.48%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.25% and a S content of 0.69% is placed in a NaOH alkali solution with a mass concentration of 40%, and is subjected to alkali leaching reaction at a temperature of 370° C. for 3 hours, and the reactant is filtered to obtain the filtrate and Alkali leaching filter cake A, NaOH consumption 97kg / t feeds ore, and described filtrate is fed into recovery treatment system, and its chemical reaction formula is:

[0035]

[0036]

[0037]

[0038]

[0039]

[0040] 2) Desliming

[0041] Add water to the alkali leaching filter cake A in step 1) to prepare a slurry with a mass concentration of 21%, and feed it into a ∮ 3.0-meter desliming hopper for desliming operation to obtain sand settling B and overflow C.

[0042] 3) re-election

[0043] Add water to the grit B in step 2) to ma...

Embodiment 2

[0045] 1) Alkaline leaching

[0046] The TFe content is 51.6%, TiO 2 content of 13.5%, SiO 2 The content is 3.82%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 5.75% and a S content of 0.75% is placed in 30% N a In OH alkali solution, carry out alkali leaching reaction at 260°C for 2 hours, filter the reactants to obtain filtrate and alkali leaching filter cake A, the NaOH consumption is 76kg / t to feed the ore, and the filtrate is fed to the recovery treatment system , its chemical reaction formula is with embodiment 1.

[0047] 2) Desliming

[0048] Add water to the alkali leaching filter cake A in step 1) to make a slurry with a mass concentration of 22%, and feed it into a ∮5.0m desliming hopper for desliming operation to obtain sand settling B and overflow C.

[0049] 3) re-election

[0050] Add water to the grit B in step 2) to make a slurry with a mass concentration of 36% and feed The spiral chute of rice is carried out gravity separat...

Embodiment 3

[0052] 1) Alkaline leaching

[0053] The TFe content is 53.7%, TiO 2 content of 12.2%, SiO 2 The content is 4.15%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 5.37% and a S content of 0.82% is placed in a NaOH alkali solution with a mass concentration of 20%, and is subjected to alkali leaching reaction at a temperature of 340° C. for 5 hours, and the reactant is filtered to obtain a filtrate and Alkali leaching filter cake A, NaOH consumption 84kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0054] 2) Desliming

[0055] Add water to the alkali leaching filter cake A in step 1) to prepare a slurry with a mass concentration of 21%, and feed it into a ∮ 3.0-meter desliming hopper for desliming operation to obtain sand settling B and overflow C.

[0056] 3) re-election

[0057] Add water to the grit B in step 2) to make a slurry with a mass concentration of 4...

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Abstract

The invention discloses a vanadium-titanium magnetite concentrate recleaning method realized through alkaline leaching, desliming and 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 260 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 obtain pulp with the mass concentration of 21%-25%, and conducting desliming to obtain set sand B and effused flow C; adding water into B to obtain pulp with a mass concentration of 35%-40%, and conducting 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 75%. 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, desliming and gravity separation. 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 vanadiu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00C22B3/12B03B5/62
Inventor 孟劲松姜成林李维兵刘晓明李之奇郭客宋仁峰吕建华
Owner ANSTEEL GRP MINING CO LTD
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