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

A technology of vanadium-titanium magnetite concentrate and oxidation alkali leaching, which is applied in the field of desliming and re-selection of vanadium-titanium magnetite concentrate, and uses oxidation alkali leaching to achieve the effects of improving comprehensive utilization, efficient separation, and reducing emissions

Inactive Publication Date: 2015-10-07
ANSTEEL GRP MINING CO LTD
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  • Summary
  • 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, desliming and re-selection 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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  • Method for recleaning vanadium-titanium magnetite concentrate through oxidative alkaline leaching and de-sliming
  • Method for recleaning vanadium-titanium magnetite concentrate through oxidative alkaline leaching and de-sliming
  • Method for recleaning vanadium-titanium magnetite concentrate through oxidative alkaline leaching and de-sliming

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 1) Oxidative alkaline leaching

[0035] The TFe content is 53.9%, TiO 2 The content is 11.0%, SiO 2 The content is 3.49%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.13% and a S content of 0.65% is placed in a NaOH alkali solution with a mass concentration of 25%, and 26psi of O 2 , then alkali leaching reaction at a temperature of 220°C for 1.5 hours, the reactant was filtered to obtain the filtrate and alkali leaching filter cake A, the NaOH consumption was 81.6 kg / t to the ore, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0036] 4mFeTiO 3 +8NaOH +mO 2 2mFe 2 o 3 ↓+4Na 2 O·(TiO 2 ) m ↓+4H 2 O m≥1

[0037] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o

[0038] Al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o

[0039] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H 2 o

[0040] 3FeS 2 +6NaOH 3FeS↓+Na 2 SO 3 +2Na 2 S+3H 2 o...

Embodiment 2

[0048] 1) Oxidative alkaline leaching

[0049] The TFe content is 52.4%, TiO 2 The content is 12.6%, SiO 2 The content is 3.75%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 5.46% and a S content of 0.81% was placed in a NaOH alkali solution with a mass concentration of 12%, and 95psi of O 2 , then alkali leaching reaction at a temperature of 330°C for 2.0 hours, and the reactants were filtered to obtain the filtrate and alkali leaching filter cake A. The NaOH consumption was 88.8kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which Chemical reaction formula is with embodiment 1;

[0050] 2) Desliming

[0051] Add water to the alkali leaching filter cake A in step 1) to prepare a slurry with a mass concentration of 24% and put it into a ∮5.0m desliming hopper for desliming operation to obtain grit B and overflow C; the grit B It is the final iron concentrate with a TFe content of 69.3%, of which SiO 2 The con...

Embodiment 3

[0054] 1) Oxidative alkaline leaching

[0055] The TFe content is 53.0%, TiO 2 The content is 12.1%, SiO 2 The content is 4.08%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 5.67% and a S content of 0.77% is placed in a NaOH alkali solution with a mass concentration of 36%, and 50.2kg / t 给矿 H 2 o 2 , then alkali leaching reaction at a temperature of 240°C for 1.0 hour, the reactants were filtered to obtain the filtrate and alkali leaching filter cake A, the NaOH consumption was 85.4kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0056] 2mFeTiO 3 +4NaOH+mH 2 o 2 mFe 2 o 3 ↓+2Na 2 O·(TiO 2 ) m ↓+(m+2)H 2 O m≥1

[0057] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o

[0058] Al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o

[0059] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H2 o

[0060] 3FeS 2 +6NaOH 3FeS↓+Na 2 SO ...

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Abstract

The invention relates to a method for recleaning vanadium-titanium magnetite concentrate through oxidative alkaline leaching and de-sliming. The method includes the following steps that the vanadium-titanium magnetite concentrate is added into an alkaline solution, an oxidizing agent is added, and then an alkaline leaching reaction is carried out for 0.5-2 hours at the temperature of 220-330 DEG C; the reactant is filtered, and the filtered liquid and an alkaline leaching filter cake A are obtained; and water is added into the filter cake A to be mixed into slurry for de-sliming. 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 time is shortened, the reaction temperature is lowered, and energy consumption and equipment investment are reduced; besides, iron concentrate with the content of TFe being 62-70% and titanium concentrate with the content of TiO2 being 40-50% are graded, efficient separation of titanium and iron in the vanadium-titanium magnetite concentrate is achieved, 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 of using oxidized alkali leaching, desliming and then selecting 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 raw ore and vanadium-tita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/12
Inventor 刘晓明余自甦郭客刘政东王洪斌全名巍王忠红宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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