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Method for utilizing oxidation alkaline leaching and desliming to re-concentrate vanadium-titanium magnetite concentrates

A vanadium-titanium-magnetite concentrate and oxidation alkali leaching technology are applied in desliming and gravity separation and re-selection of vanadium-titanium-magnetite concentrate, and use the field of oxidation alkali leaching to improve the utilization factor of blast furnace, reduce iron-making cost, and improve comprehensive utilization rate. Effect

Inactive Publication Date: 2015-09-02
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] 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 using oxidation based on the effective combination of physical and chemical beneficiation methods. The method of alkali leaching, desliming and re-election of vanadium-titanium magnetite concentrate achieves high-efficiency separation of titanium and iron in vanadium-titanium magnetite concentrate, improves the iron grade before entering the furnace, and reduces 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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  • Method for utilizing oxidation alkaline leaching and desliming to re-concentrate vanadium-titanium magnetite concentrates
  • Method for utilizing oxidation alkaline leaching and desliming to re-concentrate vanadium-titanium magnetite concentrates
  • Method for utilizing oxidation alkaline leaching and desliming to re-concentrate vanadium-titanium magnetite concentrates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) Oxidative alkaline leaching

[0040] The TFe content is 50.3%, TiO 2 The content is 14.6%, SiO 2 The content is 3.58%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.16% and a S content of 0.69% was placed in a NaOH alkali solution with a mass concentration of 38%, and 104psi of O 2 , then alkali leaching reaction at a temperature of 330°C for 1.5 hours, and the reactants were filtered to obtain the filtrate and alkali leaching filter cake A. The NaOH consumption was 86.4kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0041] 4mFeTiO 3 +8NaOH +mO 2 2mFe 2 o 3 ↓+4Na 2 O·(TiO 2 ) m ↓+4H 2 O m≥1

[0042] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o

[0043] Al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o

[0044] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H 2 o

[0045] 3FeS 2 +6NaOH 3FeS↓+Na 2 SO 3 +2Na...

Embodiment 2

[0055] 1) Oxidative alkaline leaching

[0056] The TFe content is 51.7%, TiO 2 The content is 13.2%, SiO 2 The content is 3.86%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 5.79% and a S content of 0.77% was placed in a NaOH alkali solution with a mass concentration of 29%, and 97psi of O 2 , then alkali leaching reaction at a temperature of 230° C. for 1.0 hour, the reactants were filtered to obtain the filtrate and alkali leaching filter cake A, and the NaOH consumption was 74.8 kg / t to the ore, and the filtrate was fed into the recovery treatment system, which Chemical reaction formula is with embodiment 1;

[0057] 2) Desliming

[0058] Add water to the alkali leaching filter cake A in step 1) to prepare a slurry with a mass concentration of 21% and put it into a ∮5.0m desliming hopper for desliming operation to obtain sand settling B and overflow C;

[0059] 3) re-election

[0060] Add water to the grit B in step 2) to make a slurry with...

Embodiment 3

[0063] 1) Oxidative alkaline leaching

[0064] The TFe content is 53.1%, TiO 2 The content is 12.4%, SiO 2 The content is 4.35%, Al 2 o 3The vanadium-titanium magnetite concentrate with a content of 5.28% and a S content of 0.82% is placed in a NaOH alkali solution with a mass concentration of 21%, and 90kg / t of 给矿 H 2 o 2 , then alkali leaching reaction at a temperature of 300°C for 2.0 hours, the reactants were filtered to obtain the filtrate and alkali leaching filter cake A, the NaOH consumption was 83.1kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0065] 2mFeTiO 3 +4NaOH+mH 2 o 2 mFe 2 o 3 ↓+2Na 2 O·(TiO 2 ) m ↓+(m+2)H 2 O m≥1

[0066] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o

[0067] Al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o

[0068] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H 2 o

[0069] 3FeS 2 +6NaOH 3FeS↓+Na...

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Abstract

The invention relates to a method for utilizing oxidation alkaline leaching and desliming to re-concentrate vanadium-titanium magnetite concentrates. The method comprises the steps of arranging the vanadium-titanium magnetite concentrates in aqueous alkali, adding an oxidizing agent, performing alkaline leaching reaction at the temperature ranging from 220 DEG C to 330 DEG C for 0.5-2 hours, filtering a reactant to obtain a filtrate and an alkaline leaching filter cake A, adding water into the alkaline leaching filter cake A to prepare ore pulp to perform desliming and re-concentrating operations. The method has the advantages that O2 or H2O2 introduced in alkaline leaching enables an S compound to be oxidized, reaction is accelerated, reaction time is shortened, reaction temperature, energy consumption and device investment are reduced, sorted iron ore concentrates contain 65%-70% of iron content, and titanium concentrates contain 50%-75% of TiO2 content, efficient titanium-iron separation in the vanadium-titanium magnetite concentrates is achieved, the content of impurities including TiO2, S, Si, Al and the like fed into a shaft furnace is decreased, the utilization coefficient of the shaft furnace is improved, and the comprehensive utilization rate of TiO2 resources is improved.

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 leaching with oxidation alkali, 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 ...

Claims

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Application Information

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IPC IPC(8): C22B34/12C21B5/00C22B1/00C22B3/12
CPCY02P10/20
Inventor 刘政东姜成林王洪斌刘晓明李之奇郭客陈巍宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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