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Method for processing vanadium-titanium magnetite concentrate by utilizing calcination, oxidation alkaline leaching, grading and gravity concentration

A vanadium-titanium-magnetite concentrate and oxidation alkali leaching technology is applied in the classification and gravity separation of vanadium-titanium magnetite concentrate, and the fields of calcination and oxidation alkali leaching are used to achieve the effects of reducing production cost, improving comprehensive utilization rate and improving blast furnace utilization coefficient.

Inactive Publication Date: 2015-11-11
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. The method of grading, classifying and re-selecting 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 TiO entering into 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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  • Method for processing vanadium-titanium magnetite concentrate by utilizing calcination, oxidation alkaline leaching, grading and gravity concentration
  • Method for processing vanadium-titanium magnetite concentrate by utilizing calcination, oxidation alkaline leaching, grading and gravity concentration
  • Method for processing vanadium-titanium magnetite concentrate by utilizing calcination, oxidation alkaline leaching, grading and gravity concentration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) Calcination

[0042] The TFe content is 50.1%, TiO 2 The content is 14.8%, SiO 2 The content is 3.72%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 4.48% and a S content of 0.61% was added with CaO at a ratio of 1:0.1 by weight, and calcined at a temperature of 1200°C for 35 minutes to form a calcined product A. The chemical reaction formula is:

[0043] CaO+TiO 2 CaTiO 3

[0044] 2) Oxidative alkaline leaching

[0045] The calcined product A in step 1) is placed in the NaOH alkaline solution with a mass concentration of 20%, 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 47.0kg / t for ore feeding, and the filtrate was fed into the recovery treatment system. The chemical reaction formula is:

[0046] 4mFeTiO 3 +8NaOH+mO 2 2mFe 2 o 3 ↓+4Na 2 O·(TiO 2 ) m ↓+4H 2 Om≥1

[0047] ...

Embodiment 2

[0060] 1) Calcination

[0061] The TFe content is 53.4%, TiO 2 The content is 11.5%, SiO 2 The content is 3.58%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 5.43% and a S content of 0.76% was added with CaO at a ratio of 1:0.11 by weight, and calcined at a temperature of 1000°C for 40 minutes to form a calcined product A, whose chemical reaction formula is the same as in Example 1 ;

[0062] 2) Oxidative alkaline leaching

[0063] The calcined product A in step 1) is placed in the NaOH alkali solution of 11% in mass concentration, and the O of 47psi is passed into 2 , then alkali leaching reaction at a temperature of 280°C for 1.5 hours, the reactant was filtered to obtain the filtrate and alkali leaching filter cake B, the NaOH consumption was 45.6kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which Chemical reaction formula is with embodiment 1;

[0064] 3) Grading

[0065] Add water to the medium-alkali ...

Embodiment 3

[0070] 1) Calcination

[0071] The TFe content is 51.4%, TiO 2 The content is 13.5%, SiO 2 The content is 3.73%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 5.20% and a S content of 0.63% 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 ;

[0072] 2) Oxidative alkaline leaching

[0073] Put the calcined product A in step 1) in a NaOH alkali solution with a mass concentration of 27%, and add 60kg / t 给矿 H 2 o 2 , then alkali leaching reaction at a temperature of 240°C for 70 minutes, and the reactants were filtered to obtain the filtrate and alkali leaching filter cake B. The NaOH consumption was 42.7kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0074] 2mFeTiO 3 +4NaOH+mH 2 o 2 mFe 2 o 3 ↓+2Na 2 O·(TiO 2 ) m ↓+(m+2)H 2...

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Abstract

The invention relates to a method for processing vanadium-titanium magnetite concentrate by utilizing calcination, oxidation alkaline leaching, grading and gravity concentration. The method comprises the following steps: adding vanadium-titanium magnetite concentrate in CaO in a weight proportion of the vanadium-titanium magnetite concentrate to the CaO being 1:0.1-0.2 so as to obtain a mixture; calcinating the mixture under the temperature of 800-1400DEG C so as to obtain a calcination product A; placing the calcination product A in an alkaline solution of which the mass concentration is 5-52% so as to obtain a mixed solution; adding an oxidizing agent in the mixed solution; performing an alkaline leaching reaction on the oxidizing agent and the mixed solution under the temperature of 220-330DEG C so as to obtain a filtrate and an alkaline leaching filter cake B; grading the filter cake B; and performing gravity concentration on the graded filter cake B. The method disclosed by the invention has the advantages that through the introduction of O2 or H2O2 in oxidation alkaline leaching, a compound containing S is oxidized, the reaction is accelerated, the reaction temperature is lowered, and the reaction time is shortened; the iron concentrate containing 63-69% of TFe, and the titanium concentrate containing 53-62% of TiO2 are obtained through mineral separation; the content of impurities, such as TiO2, S, Si and Al, entering a blast furnace is reduced; the utilization coefficient of the blast furnace is increased; besides, the comprehensive utilization rate of titanium resources is increased.

Description

technical field [0001] The invention relates to a beneficiation process of vanadium-titanium magnetite concentrate, in particular to a method of utilizing calcination, oxidizing alkali leaching, classification and re-selection of vanadium-titanium magnetite concentrate. 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 r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B1/16B03B5/30B03B5/34
CPCY02P10/20
Inventor 徐连生李肃鞠洪钢韩晓东赵亮郭客刘晓明宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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