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Vanadium-titanium magnetite concentrate re-concentration method achieved through oxidation alkaline leaching, classification and reselection

A technology of vanadium-titanium magnetite concentrate and oxidation alkali leaching, which is applied in the direction of solid separation, etc., to achieve the effects of improving comprehensive utilization rate, improving blast furnace utilization coefficient, and reducing ironmaking cost

Inactive Publication Date: 2015-11-04
ANSTEEL GRP MINING CO LTD
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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, classification, gravity separation and re-election of vanadium-titanium magnetite concentrate realizes efficient separation of titanium and iron in vanadium-titanium magnetite concentrate, improves the grade of iron 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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  • Vanadium-titanium magnetite concentrate re-concentration method achieved through oxidation alkaline leaching, classification and reselection
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  • Vanadium-titanium magnetite concentrate re-concentration method achieved through oxidation alkaline leaching, classification and reselection

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Such as figure 1 shown.

[0039] 1) Oxidative alkaline leaching

[0040] The TFe content is 50.4%, TiO 2 The content is 15.0%, SiO 2 The content is 3.80%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.52% and a S content of 0.66% is placed in a NaOH alkali solution with a mass concentration of 28%, and 25psi of O 2 , then alkali leaching reaction at a temperature of 220° C. for 1.0 hour, and the reactant was filtered to obtain the filtrate and alkali leaching filter cake A. The NaOH consumption was 77.6 kg / t to the ore, 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 +6...

Embodiment 2

[0055] Such as figure 1 shown.

[0056] 1) Oxidative alkaline leaching

[0057] The TFe content is 51.3%, TiO 2 The content is 14.1%, SiO 2 The content is 3.19%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.58% and a S content of 0.61% is placed in a NaOH alkali solution with a mass concentration of 12%, and 83psi of O 2 , then alkali leaching reaction at a temperature of 290° C. for 1.0 hour, and the reactants were filtered to obtain the filtrate and alkali leaching filter cake A. The NaOH consumption was 82.6 kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which Chemical reaction formula is with embodiment 1.

[0058] 2) Grading

[0059] Add water to the medium-alkali leaching filter cake A in step 1) to form a slurry with a mass concentration of 24% and put it into the cyclone for classification, and classify the grit B and overflow C.

[0060] 3) re-election

[0061] Add water to the grit B in step 2)...

Embodiment 3

[0064] Such as figure 2 shown.

[0065] 1) Oxidative alkaline leaching

[0066] The TFe content is 53.5%, TiO 2 The content is 12.1%, SiO 2 The content is 4.15%, Al 2 o3 The vanadium-titanium magnetite concentrate with a content of 3.89% and a S content of 0.61% is placed in a NaOH alkali solution with a mass concentration of 36%, and 100kg / t 给矿 H 2 o 2 , then alkali leaching reaction at a temperature of 330° C. for 0.5 hour, and the reactant was filtered to obtain the filtrate and alkali leaching filter cake A. The NaOH consumption was 83.2 kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0067] 2mFeTiO 3 +4NaOH+mH 2 o 2 mFe 2 o 3 ↓+2Na 2 O·(TiO 2 ) m ↓+(m+2)H 2 O m≥1

[0068] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o

[0069] Al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o

[0070] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H 2 o

...

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Abstract

The invention relates to a vanadium-titanium magnetite concentrate re-concentration method achieved through oxidation alkaline leaching, classification and reselection. The method includes the following steps that vanadium-titanium magnetite concentrate is placed in an alkaline solution; oxidization agents are added, and then, an alkaline leaching reaction lasts for 0.5-2 h at the temperature of 220-330 DEG C; reactants are filtered, and then filter liquor and alkaline leached filter cakes A are obtained; water is added in the alkaline leached filter cakes A, and ore pulp is prepared; and the ore pulp is fed into a hydrocyclone for classification and reselection. The method has the beneficial effects that due to introduction of O2 or H2O2 during oxidation alkaline leaching, S compounds can be oxidized, the reaction is accelerated, the reaction time is shortened, the reaction temperature is lowered, and energy consumption and equipment investment are reduced; iron concentrate with the TFe content being 65-70% and titanium concentrate with the TiO2 content being 50-60% can be selected; titanium and iron of the vanadium-titanium magnetite concentrate are efficiently separated; the content of the TiO2, S, Si, Al and other impurities entering a blast furnace is reduced; the utilizing coefficient of the blast furnace is increased; and meanwhile, the comprehensive utilization rate of titanium resources is increased.

Description

technical field [0001] The present invention relates to a kind of beneficiation process of vanadium-titanium magnetite concentrate, in particular to a method of re-selecting vanadium-titanium magnetite concentrate by leaching with oxidation alkali, grading 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 m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00C22B3/12
Inventor 孟劲松王忠红姜成林张志强刘晓明赵亮宋剑宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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