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Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, desliming and magnetic separation

A technology of vanadium-titanium magnetite concentrate and magnetic separation, which is applied in desliming and magnetic separation and re-selection of vanadium-titanium magnetite concentrate, using calcination and alkali leaching to reduce emissions, improve blast furnace utilization coefficient, and reduce ironmaking costs Effect

Active Publication Date: 2014-08-06
ANSTEEL GRP MINING CO LTD
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  • Abstract
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  • Claims
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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. The method of desliming and magnetic separation 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, while reducing NaOH or KOH consumption, reducing environmental pollution

Method used

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  • Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, desliming and magnetic separation
  • Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, desliming and magnetic separation
  • Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, desliming and magnetic separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] like figure 1 shown

[0040] 1) Calcination

[0041] The TFe content is 50.9%, TiO 2 content of 14.3%, SiO 2 The content is 4.88%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 4.69% and a S content of 0.83% is added with CaO at a ratio of 1:0.15 by weight, and is calcined at a temperature of 1100°C for 40 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 30%, and the alkali leaching reaction is carried out at a temperature of 350° C. for 3.0 hours, and the reactant is filtered to obtain the filtrate and the alkali leaching filter cake B, NaOH Consumption of 49.0kg / t is fed to the ore, and the filtrate is fed into the recovery treatment system, and its chemical reaction formula is:

[0045] m≥1

[0046]

[0047]

[0048]

[0049]

[0050] 3) Desliming

[005...

Embodiment 2

[0055] like figure 1 shown.

[0056] 1) Calcination

[0057] The TFe content is 52.4%, TiO 2 content of 14.0%, SiO 2 The content is 4.36%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 4.52% and a S content of 0.93% 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 .

[0058] 2) Alkaline leaching

[0059] The calcined product A in step 1) is placed in a NaOH alkali solution with a mass concentration of 18%, and the alkali leaching reaction is carried out at a temperature of 330° C. for 2.0 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.

[0060] 3) Desliming

[0061] Add water to the alkali leaching f...

Embodiment 3

[0065] like figure 1 shown.

[0066] 1) Calcination

[0067] The TFe content is 51.3%, TiO 2 content of 14.0%, SiO 2 The content is 4.44%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 4.27% and a S content of 0.79% was added with CaO at a ratio of 1:0.11 by weight, and calcined at a temperature of 1300°C for 30 minutes to form a calcined product A, whose chemical reaction formula is the same as in Example 1 .

[0068] 2) Alkaline leaching

[0069] The calcined product A in step 1) is placed in a NaOH alkali solution with a mass concentration of 42%, and the alkali leaching reaction is carried out at a temperature of 350° C. for 2.0 hours, and the reactant is filtered to obtain the filtrate and the alkali leaching filter cake B, NaOH Consumption 52.8kg / t feeds ore, and described filtrate feeds recovery treatment system, and its chemical reaction formula is the same as embodiment 1.

[0070] 3) Desliming

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

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Abstract

The invention discloses a method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, desliming and magnetic separation. 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, an alkaline leaching reaction is conducted for 0.5 to 5 hours at the temperature ranging from 300 DEG C to 370 DEG C, 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 for desliming operation, and settling sand C and overflow D are obtained; water is added to the settling sand C, so that ore pulp is prepared for magnetic separation, and final iron ore concentrates with the TFe content ranging from 63% to 68% and final titanium concentrates with the TiO2 content ranging from 35% to 50% are screened. 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, 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, desliming and magnetic separation. 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 o...

Claims

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Application Information

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IPC IPC(8): B03B7/00
Inventor 刘政东赵亮刘晓明余自甦郭客陈巍王忠红宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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