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

A technology of vanadium-titanium magnetite concentrate and oxidative alkali leaching, which is applied in the fields of classification and magnetic gravity re-selection of vanadium-titanium magnetite concentrate, calcination, and oxidative alkali leaching to improve comprehensive utilization rate, high-efficiency separation, and increase blast furnace utilization coefficient Effect

Inactive Publication Date: 2015-09-09
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 and good operability on the basis of an effective combination of physical and chemical beneficiation methods. , grading and magnetic gravity re-selection of vanadium-titanium magnetite concentrate, to achieve high-efficiency separation of titanium and iron in vanadium-titanium magnetite concentrate, improve the iron grade before entering the furnace, and reduce the 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, while reducing NaOH or KOH consumption, reducing 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

[0046] 1) Calcination

[0047] The TFe content is 50.1%, TiO 2 The content is 14.9%, SiO 2 The content is 3.67%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 4.49% and a S content of 0.59% is added with CaO at a ratio of 1:0.1 by weight, and is calcined at a temperature of 1200°C for 30 minutes to form a calcined product A. The chemical reaction formula is:

[0048] CaO + TiO 2 CaTiO 3

[0049] 2) Oxidative alkaline leaching

[0050] The calcined product A in step 1) is placed in the NaOH alkaline solution with a mass concentration of 16%, and 23psi of O 2 , then alkali leaching reaction at a temperature of 220°C for 1.0 hour, and the reactants were filtered to obtain the filtrate and alkali leaching filter cake B. The NaOH consumption was 47.4 kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0051] 4mFeTiO 3 +8NaOH +mO 2 2mFe 2 o 3 ↓+4Na 2 O·(TiO 2 ) m ↓+4H ...

Embodiment 2

[0066] 1) Calcination

[0067] The TFe content is 53.4%, TiO 2 The content is 11.5%, SiO 2 The content is 3.58%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 5.49% and a S content of 0.73% was added with CaO at a ratio of 1:0.11 by weight, and calcined at a temperature of 1000°C for 45 minutes to form a calcined product A, whose chemical reaction formula is the same as in Example 1 ;

[0068] 2) Oxidative alkaline leaching

[0069] The calcined product A in step 1) is placed in the NaOH alkaline solution with a mass concentration of 11%, and 43psi of O 2 , then alkali leaching reaction at a temperature of 280° C. for 1.5 hours, and the reactant was filtered to obtain the filtrate and alkali leaching filter cake B. The NaOH consumption was 45.1 kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which Chemical reaction formula is with embodiment 1;

[0070] 3) Grading

[0071] Add water to the medium-alkali leaching fi...

Embodiment 3

[0077] 1) Calcination

[0078] The TFe content is 51.3%, TiO 2 The content is 13.8%, SiO 2 The content is 3.73%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 5.16% and a S content of 0.66% was added with CaO at a ratio of 1:0.11 by weight, and calcined at a temperature of 900°C for 50 minutes to form a calcined product A, whose chemical reaction formula is the same as in Example 1 ;

[0079] 2) Oxidative alkaline leaching

[0080] The calcined product A in step 1) is placed in a NaOH alkali solution with a mass concentration of 29%, and 58kg / t 给矿 H 2 o 2 , then alkali leaching reaction at a temperature of 240°C for 75 minutes, the reactant was filtered to obtain the filtrate and alkali leaching filter cake B, the NaOH consumption was 42.6kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0081] 2mFeTiO 3 +4NaOH+mH 2 o 2 mFe 2 o 3 ↓+2Na 2 O·(TiO 2 ) m ↓+(m+2)H...

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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: adding vanadium-titanium magnetite concentrate into CaO (Calcium Oxide) according to the weight ratio of 1: (0.1-0.2), calcining at 800-1400 DEG C, placing a calcined product A into aqueous alkali of which the mass concentration is 5-52%, adding an oxidant, carrying out alkaline leaching reaction for 0.5-2.0 hours at 220-330 DEG C to obtain a filtrate and an alkaline leaching filter cake B, and carrying out grading and magnetic gravitational reselection on the filter cake B. 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 and the reaction time can be shortened; furthermore, iron ore concentrate, of which TFe (Tetrafluoroethylene) content is 63-69% and TiO2 (Titanium Oxide) content is 50-72%, 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 vanadium-titanium magnetite concentrate, in particular to a method for re-selecting vanadium-titanium magnetite concentrate by calcination, oxidizing alkali leaching, classification and magnetic gravity. 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 mag...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03B1/00B03B1/04C22B3/12
CPCB03B1/00B03B1/04B03B7/00C22B3/12Y02P10/20
Inventor 邓鹏宏巴红王忠红朱大鹏赵亮李肃全名巍宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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