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Vanadium-titanium magnetite concentrate method by using calcinations, oxidation by alkaline leaching, grading and magnetic gravitational reselection

A vanadium-titanium-magnetite concentrate and magnetic-gravity combined technology, which is applied in chemical instruments and methods, solid separation, wet separation, etc., to achieve the effects of reducing emissions, improving the utilization factor of blast furnaces, and improving comprehensive utilization.

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

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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, magnetic gravity combined re-election of vanadium-titanium magnetite concentrate realizes efficient 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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  • Vanadium-titanium magnetite concentrate method by using calcinations, oxidation by alkaline leaching, grading and magnetic gravitational reselection
  • Vanadium-titanium magnetite concentrate method by using calcinations, oxidation by alkaline leaching, grading and magnetic gravitational reselection
  • Vanadium-titanium magnetite concentrate method by using calcinations, oxidation by alkaline leaching, grading and magnetic gravitational reselection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1 shown.

[0042] 1) Oxidative alkaline leaching

[0043] The TFe content is 52.5%, TiO 2 The content is 12.8%, SiO 2 The content is 4.79%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.93% and a S content of 0.73% is placed in a NaOH alkali solution with a mass concentration of 10%, and 55psi of O 2 , then alkali leaching reaction at a temperature of 240°C for 2.0 hours, the reactant was filtered to obtain the filtrate and alkali leaching filter cake A, the NaOH consumption was 81.9 kg / t to the ore, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0044] 4mFeTiO 3 +8NaOH +mO 2 2mFe 2 o 3 ↓+4Na 2 O·(TiO 2 ) m ↓+4H 2 O m≥1

[0045] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o

[0046] Al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o

[0047] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H 2 o

[0048] 3FeS 2 +6NaOH ...

Embodiment 2

[0059] Such as figure 1 shown.

[0060] 1) Oxidative alkaline leaching

[0061] The TFe content is 51.3%, TiO 2 The content is 11.9%, SiO 2 The content is 4.70%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.96% and a S content of 0.85% was placed in a NaOH alkali solution with a mass concentration of 17%, and 113psi of O 2 , then alkali leaching reaction at a temperature of 225° C. for 2.0 hours, and the reactants were filtered to obtain the filtrate and alkali leaching filter cake A. The NaOH consumption was 80.8 kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which Chemical reaction formula is with embodiment 1;

[0062] 2) Grading

[0063] 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 Y;

[0064] 3) Combined magnetic gravity beneficiation

[0065] Ad...

Embodiment 3

[0069] Such as figure 1 shown.

[0070] 1) Oxidative alkaline leaching

[0071] The TFe content is 50.4%, TiO 2 The content is 14.6%, SiO 2 The content is 4.72%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.69% and a S content of 0.66% is placed in a NaOH alkali solution with a mass concentration of 23%, and 196kg / t of 给矿 H 2 o 2 , then alkali leaching reaction at a temperature of 250° C. for 1.0 hour, and the reactants were filtered to obtain filtrate and alkali leaching filter cake A. The NaOH consumption was 79.3 kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0072] 2mFeTiO 3 +4NaOH+mH 2 o mFe 2 o 3 ↓+2Na 2 O·(TiO 2 ) m ↓+(m+2)H 2 O m≥1

[0073] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o

[0074] al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o

[0075] 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 method by using calcinations, oxidation by alkaline leaching, grading and magnetic gravitational reselection. The method comprises the following steps: placing vanadium-titanium magnetite concentrate into aqueous alkali, adding an oxidant, carrying out alkaline leaching reaction for 0.5-2.0 hours at 220-330 DEG C, filtrating a reactant to obtain a filtrate and an alkaline leaching filter cake A, and adding water into the alkaline leaching filter cake A to prepare into ore pulp and then feeding the ore pulp into a cyclone for grading and magnetic gravitational beneficiation combined method. The method provided by the invention has the advantages that either O2 (Oxygen) or H2O2 (Hydrogen Peroxide), during the process of oxidation by alkaline leaching, is introduced so that the oxidation reaction of an S (Sulfur)-containing compound is accelerated, therefore the reaction temperature can be reduced, the reaction time can be shortened and energy consumption and equipment investment can be reduced; furthermore, iron ore concentrate, of which TFe (Tetrafluoroethylene) content is 63-69% and TiO2 (Titanium Oxide) content is 50-70%, can be selected so that the contents of TiO2, S, Si (Silicon), Al (Aluminum) and other impurities which enter a blast furnace can be reduced, the capacity factor of the blast furnace can be improved, and the rate of multipurpose utilization of a titanium resource can be improved.

Description

technical field [0001] The invention relates to a beneficiation process of a vanadium-titanium magnetite concentrate, in particular to a method for re-selecting a vanadium-titanium magnetite concentrate by utilizing oxidation alkali leaching, classification and magnetic gravity combination. 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...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03B1/04C22B3/12
CPCB03B1/04B03B7/00C22B3/12Y02P10/20
Inventor 郭客张志强韩晓东王绍燕王珂李化刘晓明宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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