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The method of re-selecting vanadium-titanium magnetite concentrate by calcination, alkali leaching, desliming and gravity separation

A technology of vanadium-titanium magnetite concentrate and alkali leaching, which is applied in desliming and re-selection of vanadium-titanium magnetite concentrate, using calcination and alkali leaching to improve comprehensive utilization rate, increase blast furnace utilization factor, and reduce emissions Effect

Active Publication Date: 2016-06-01
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 mineral processing 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 using calcination, alkali leaching, The method of desliming and re-selection of vanadium-titanium magnetite concentrate achieves 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 the consumption of NaOH or KOH, reducing environmental pollution

Method used

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  • The method of re-selecting vanadium-titanium magnetite concentrate by calcination, alkali leaching, desliming and gravity separation
  • The method of re-selecting vanadium-titanium magnetite concentrate by calcination, alkali leaching, desliming and gravity separation
  • The method of re-selecting vanadium-titanium magnetite concentrate by calcination, alkali leaching, desliming and gravity separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Calcination

[0038] The TFe content is 51.1%, TiO 2 content of 13.6%, SiO 2 The content is 3.59%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 4.05% and a S content of 0.62% is added with CaO in a ratio of 1:0.2 by weight, and is calcined at a temperature of 850°C for 55 minutes to form a calcined product A. The chemical reaction formula is:

[0039]

[0040] 2) Alkaline leaching

[0041] The calcined product A in step 1) is placed in a NaOH alkali solution with a mass concentration of 35%, and the alkali leaching reaction is carried out at a temperature of 360° C. for 3.5 hours, and the reactant is filtered to obtain the filtrate and the alkali leaching filter cake B, NaOH Consumption of 57.3kg / t is fed to the ore, and the filtrate is fed into the recovery treatment system, and its chemical reaction formula is:

[0042]

[0043]

[0044] 3) Desliming

[0045] Add water to the alkali leaching filter cake B in step 2) to prepare a...

Embodiment 2

[0049] 1) Calcination

[0050] The TFe content is 51.9%, TiO 2 content of 13.8%, SiO 2 The content is 3.72%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 5.78% and a S content of 0.72% was added with CaO at a ratio of 1:0.18 by weight, and calcined at a temperature of 950°C for 50 minutes to form a calcined product A, whose chemical reaction formula is the same as in Example 1 .

[0051] 2) Alkaline leaching

[0052] The calcined product A in step 1) is placed in a NaOH alkali solution with a mass concentration of 32%, and the alkali leaching reaction is carried out at a temperature of 300°C for 2.0 hours, and the reactant is filtered to obtain the filtrate and the alkali leaching filter cake B, NaOH Consumption 45.2kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0053] 3) Desliming

[0054] Add water to the alkali leaching filter cake B in step 2) to prepare ...

Embodiment 3

[0058] 1) Calcination

[0059] The TFe content is 54.0%, TiO 2 content of 12.9%, SiO 2 The content is 4.03%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 5.22% and a S content of 0.94% was added with CaO at a ratio of 1:0.16 by weight, and calcined at a temperature of 1100° C. for 40 minutes to form a calcined product A, whose chemical reaction formula is the same as in Example 1 .

[0060] 2) Alkaline leaching

[0061] The calcined product A in step 1) is placed in a NaOH alkali solution with a mass concentration of 22%, and the alkali leaching reaction is carried out at a temperature of 350° C. for 4.5 hours, and the reactant is filtered to obtain the filtrate and the alkali leaching filter cake B, NaOH Consumption 49.7kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0062] 3) Desliming

[0063] Add water to the alkali leaching filter cake B in step 2) to...

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Abstract

The invention discloses a method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, desliming 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 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 gravity concentration, gravity concentrates E, gravity tailings F and gravity middlings G are respectively obtained, the gravity concentrates E are final iron ore concentrates, the gravity tailings F are final tailings, and final titanium concentrates are obtained by combining the gravity middlings G with the overflow D. 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, 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 gravity 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 or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03B5/62C22B3/12
Inventor 王俊山刘炳宇刘晓明郭客陈巍王忠红彭磊宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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