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Method for recleaning vanadium-titanium magnetite concentrates by oxidation alkaline leaching, grading and magnetic separation

A vanadium-titanium-magnetite concentrate and oxidized alkali leaching technology is applied in classification and magnetic separation and re-selection of vanadium-titanium-magnetite concentrate, and utilizes the field of oxidized alkali leaching to achieve the effects of improving comprehensive utilization rate, high-efficiency separation and improving blast furnace utilization coefficient

Inactive Publication Date: 2015-08-26
ANSTEEL GRP MINING CO LTD
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  • Abstract
  • Description
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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 using oxidation based on the effective combination of physical and chemical beneficiation methods. The method of alkali leaching, classification and magnetic separation to re-select the vanadium-titanium magnetite concentrate realizes the efficient separation of titanium and iron in the 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 recleaning vanadium-titanium magnetite concentrates by oxidation alkaline leaching, grading and magnetic separation
  • Method for recleaning vanadium-titanium magnetite concentrates by oxidation alkaline leaching, grading and magnetic separation
  • Method for recleaning vanadium-titanium magnetite concentrates by oxidation alkaline leaching, grading and magnetic separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Such as figure 1 shown.

[0041] 1) Oxidative alkaline leaching

[0042] The TFe content is 50.5%, TiO 2 The content is 14.7%, SiO 2 The content is 5.05%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.89% and a S content of 0.83% is placed in a NaOH alkali solution with a mass concentration of 24%, and 32psi of O 2 , then alkali leaching reaction at a temperature of 320°C for 1.0 hour, the reactants were filtered to obtain the filtrate and alkali leaching filter cake A, the NaOH consumption was 82.6 kg / t to the ore, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0043] 4mFeTiO 3 +8NaOH +mO 2 2mFe 2 o 3 ↓+4Na 2 O·(TiO 2 ) m ↓+4H 2 O m≥1

[0044] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o

[0045] Al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o

[0046] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H 2 o

[0047] 3FeS 2 +6NaOH...

Embodiment 2

[0057] Such as figure 1 shown.

[0058] 1) Oxidative alkaline leaching

[0059] The TFe content is 51.7%, TiO 2 The content is 13.8%, SiO 2 The content is 4.98%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.86% and a S content of 0.85% was placed in a NaOH alkali solution with a mass concentration of 17%, and 106psi of O 2 , then alkali leaching reaction at a temperature of 250°C for 1.0 hour, the reactants were filtered to obtain the filtrate and alkali leaching filter cake A, the NaOH consumption was 81.4kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which Chemical reaction formula is with embodiment 1;

[0060] 2) Grading

[0061] Add water to the medium alkali leaching filter cake A in step 1) to form a slurry with a mass concentration of 21% and put it into the cyclone for classification, and classify the grit B and overflow C;

[0062] 3) Magnetic separation

[0063] Add water to the grit B in ste...

Embodiment 3

[0066] Such as figure 1 shown.

[0067] 1) Oxidative alkaline leaching

[0068] The TFe content is 52.6%, TiO2 The content is 12.3%, SiO 2 The content is 4.66%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.86% and a S content of 0.72% is placed in a NaOH alkali solution with a mass concentration of 40%, and 56kg / t 给矿 H 2 o 2 , then alkali leaching reaction at a temperature of 220°C for 1.5 hours, the reactant was filtered to obtain the filtrate and alkali leaching filter cake A, the NaOH consumption was 88.4kg / t to the ore, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0069] 2mFeTiO 3 +4NaOH+mH 2 o mFe 2 o 3 ↓+2Na 2 O·(TiO 2 ) m ↓+(m+2)H 2 O m≥1

[0070] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o

[0071] Al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o

[0072] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H 2 o

[0073] 3FeS 2 ...

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Abstract

The invention relates to a method for recleaning vanadium-titanium magnetite concentrates by oxidation alkaline leaching, grading and magnetic separation. The method comprises the following steps: putting the vanadium-titanium magnetite concentrates into an aqueous alkali, adding an oxidizing agent therein, then alkaline leaching for 0.5-2 hours under a temperature of 220 degrees centigrade to 330 degrees centigrade, filtering the reactant to obtain a filtrate and an alkaline leached filter cake A; adding water into the leached filter cake A to prepare an ore pulp which is sent into a hydrocyclone for being graded and magnetically separated therein. The method has the advantages that the introduction of O2 or H2O2 in the oxidation alkaline leaching allows the compound containing S to be oxidized, thereby accelerating the reaction, shortening the reaction time, and reducing the reaction temperature, the energy consumption and the equipment investment; moreover, the iron ore concentrate containing 63%-69% of TFe and the titanium concentrate containing 35%-50% of TiO2 are respectively separated out, thereby achieving the efficient separation of titanium and iron in the vanadium-titanium magnetite concentrates, reducing the content of impurities such as TiO2, S, Si, and Al entering the blast furnace, increasing the utilization ratio of the blast furnace, and also increasing the comprehensive utilization ratio of the titanium resource.

Description

technical field [0001] The invention relates to a beneficiation process of vanadium-titanium magnetite concentrate, in particular to a method for re-separating vanadium-titanium magnetite concentrate by leaching with oxidation alkali, grading and magnetic 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): B03B7/00
CPCB03B7/00
Inventor 宋仁峰王珂刘政东韩晓东曹新全李化朱大鹏刘晓明
Owner ANSTEEL GRP MINING CO LTD
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