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Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, classification and combination of magnetic separation and gravity concentration

A technology of vanadium-titanium magnetite concentrate and magnetic gravity combination, which is applied in chemical instruments and methods, magnetic separation, solid separation, etc.

Active Publication Date: 2014-08-06
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] 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 the effective combination of physical and chemical beneficiation methods. Classification and magnetic gravity combined re-selection method of vanadium-titanium magnetite concentrate, which realizes efficient separation of

Method used

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  • Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, classification and combination of magnetic separation and gravity concentration
  • Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, classification and combination of magnetic separation and gravity concentration
  • Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, classification and combination of magnetic separation and gravity concentration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1) Calcination

[0041] The TFe content is 53.2%, TiO 2 content of 12.9%, SiO 2 The content is 4.49%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 4.56% and a S content of 0.84% ​​is added with CaO at a ratio of 1:0.12 by weight, and calcined at a temperature of 1350°C for 20 minutes to form a calcined product A. The chemical reaction formula is:

[0042]

[0043] 2) Alkaline leaching

[0044] The calcined product A in step 1) is placed in a NaOH alkali solution with a mass concentration of 10%, and the alkali leaching reaction is carried out at a temperature of 310° C. for 4.5 hours, and the reactant is filtered to obtain the filtrate and the alkali leaching filter cake B, NaOH Consumption of 47kg / t is fed to the ore, and the filtrate is fed into the recovery treatment system, and its chemical reaction formula is:

[0045]

[0046]

[0047] 3) Grading

[0048] Add water to the alkali leaching filter cake B in step 2) to form an ore ...

Embodiment 2

[0053] 1) Calcination

[0054] The TFe content is 51.9%, TiO 2 content of 12.1%, SiO 2 The content is 4.55%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 4.67% and a S content of 0.75% was added with CaO at a ratio of 1:0.13 by weight, and calcined at a temperature of 1300°C for 25 minutes to form a calcined product A, whose chemical reaction formula is the same as in Example 1 .

[0055] 2) Alkaline leaching

[0056] The calcined product A in step 1) is placed in a NaOH alkali solution with a mass concentration of 15%, and the alkali leaching reaction is carried out at a temperature of 320° C. for 3.5 hours, and the reactant is filtered to obtain the filtrate and the alkali leaching filter cake B, NaOH Consumption 46.5kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0057] 3) Grading

[0058] Add water to the alkali leaching filter cake B in step 2) to form an...

Embodiment 3

[0063] 1) Calcination

[0064] The TFe content is 51.6%, TiO 2 content of 14.0%, SiO 2 The content is 4.25%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.27% 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 1200° C. for 35 minutes to form a calcined product A, whose chemical reaction formula is the same as in Example 1 .

[0065] 2) Alkaline leaching

[0066] The calcined product A in step 1) is placed in a NaOH alkali solution with a mass concentration of 21%, and the alkali leaching reaction is carried out at a temperature of 330° C. for 3.0 hours, and the reactant is filtered to obtain the filtrate and the alkali leaching filter cake B, NaOH Consumption 47.2kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0067] 3) Grading

[0068] Add water to the alkali leaching filter cake B in step 2) to f...

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Abstract

The invention discloses a method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, classification and combination of magnetic separation and gravity concentration. The method comprises the following steps that CaO is added to the vanadium-titanium magnetite concentrates, the mixture is calcined for 20 to 60 minutes at the temperature ranging from 800 DEG C to 1400 DEG C, and therefore a calcined product A is formed; the product A is placed in an alkaline solution with the mass concentration ranging from 5% to 52%, an alkaline leaching reaction is conducted for 0.5 to 5 hours, and filtrate and an alkaline leaching filter cake B are obtained through filtration; water is added to the alkaline leaching filter cake B, so that ore pulp is prepared and fed into a hydrocyclone for classification, and settling sand C and overflow Y are obtained through classification; water is added to the settling sand C, and ore pulp with the mass concentration ranging from 30% to 41% is prepared for magnetic separation and gravity concentration. The method has the advantages that consumption of NaOH or KOH is reduced, the vanadium-titanium magnetite concentrates are efficiently screened, alkali consumption is low, the content of impurities such as Al and Si which enter a blast furnace is reduced, the blast furnace use coefficient is increased, emission of blast furnace slag is reduced, iron manufacture cost is reduced, the problems of the high S content and serious pollution in the smelting process are solved, and meanwhile the comprehensive use rate of titanium resources is 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, 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-titanium m...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03B5/34B03C1/00B03B5/62
Inventor 刘晓明巴红朱大鹏刘炳宇李海臣王忠红全名威宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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