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Method for recleaning vanadium-titanium magnetite concentrate through forging, oxidative alkaline leaching and de-sliming

A vanadium-titanium-magnetite concentrate and oxidation alkali leaching technology are applied in oxidation alkali leaching and desliming and then select vanadium-titanomagnetite concentrate, and use the field of calcination to achieve the effects of high-efficiency separation, emission reduction and iron-making cost reduction

Inactive Publication Date: 2015-10-07
ANSTEEL GRP MINING CO LTD
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  • Abstract
  • Description
  • Claims
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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. And the method of desliming and re-selecting the vanadium-titanium magnetite concentrate has realized the efficient separation of titanium and iron in the vanadium-titanium magnetite concentrate, improved the iron grade before entering the furnace, and reduced 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, while reducing NaOH or KOH consumption, reducing environmental pollution

Method used

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  • Method for recleaning vanadium-titanium magnetite concentrate through forging, oxidative alkaline leaching and de-sliming
  • Method for recleaning vanadium-titanium magnetite concentrate through forging, oxidative alkaline leaching and de-sliming
  • Method for recleaning vanadium-titanium magnetite concentrate through forging, oxidative alkaline leaching and de-sliming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Calcination

[0039] The TFe content is 50.5%, TiO 2 The content is 13.7%, SiO 2 The content is 3.33%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 4.12% and a S content of 0.70% is added with CaO at a ratio of 1:0.1 by weight, and is calcined at a temperature of 900°C for 50 minutes to form a calcined product A. The chemical reaction formula is:

[0040] CaO + TiO 2 CaTiO 3

[0041] 2) Oxidative alkaline leaching

[0042] The calcined product A in step 1) is placed in the NaOH alkali solution that the mass concentration is 45%, and the O of 89psi is passed into 2 , then alkali leaching reaction at a temperature of 220°C for 100 minutes, the reactant was filtered to obtain the filtrate and alkali leaching filter cake B, the NaOH consumption was 46.8 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 )...

Embodiment 2

[0055] 1) Calcination

[0056] The TFe content is 52.0%, TiO 2 The content is 12.8%, SiO 2 The content is 3.46%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 5.39% and a S content of 0.65% was added with CaO at a ratio of 1:0.12 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 .

[0057] 2) Oxidative alkaline leaching

[0058] The calcined product A in step 1) is placed in the NaOH alkaline solution with a mass concentration of 10%, and 103 psi of O 2 , then alkali leaching reaction at a temperature of 330° C. for 2.0 hours, and the reactant was filtered to obtain the filtrate and alkali leaching filter cake B. The NaOH consumption was 26 kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which Chemical reaction formula is with embodiment 1.

[0059] 3) Desliming

[0060] Add water to the alkali leaching filte...

Embodiment 3

[0063] 1) Calcination

[0064] The TFe content is 53.6%, TiO 2 The content is 12.0%, SiO 2 The content is 4.31%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 5.41% and a S content of 0.64% was added with CaO at a ratio of 1:0.13 by weight, and calcined at a temperature of 800°C for 40 minutes to form a calcined product A, whose chemical reaction formula is the same as in Example 1 .

[0065] 2) Oxidative alkaline leaching

[0066] Put the calcined product A in step 1) in a NaOH alkali solution with a mass concentration of 32%, and add 78kg / t 给矿 H 2 o 2 , then alkali leaching reaction at a temperature of 280°C for 1.0 hour, the reactants were filtered to obtain the filtrate and alkali leaching filter cake B, the NaOH consumption was 40 kg / t to the ore, 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 ...

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Abstract

The invention relates to a method for recleaning vanadium-titanium magnetite concentrate through forging, oxidative alkaline leaching and de-sliming. The method includes the following steps that CaO is added into the vanadium-titanium magnetite concentrate according to the weight proportion of 1 to 0.1-0.2, and forging is performed at the temperature ranging from 800 DEG C to 1400 DEG C; the forged product A is placed in an alkaline solution with the mass concentration being 5-52%; an oxidizing agent is added, then an alkaline leaching reaction is carried out for 0.5-2.0 hours at the temperature of 220-330 DEG C, and filtered liquid and an alkaline leaching filter cake B are obtained; and the filter cake B is de-slimed and recleaned. The method has the advantages that a compound containing S is oxidized by introducing O2 or H2O2 during oxidative alkaline leaching, the reaction is accelerated, the reaction temperature is lowered, and the reaction time is shortened; besides, iron concentrate with the content of TFe being 60-69% and titanium concentrate with the content of TiO2 being 42-50% are graded, 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, and meanwhile 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 for re-selecting vanadium-titanium magnetite concentrate by calcination, oxidizing alkali leaching and desliming. 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 ore and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/12C22B1/02
Inventor 郭客刘晓明张颖李之奇巴红刘政东赵亮宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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