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

A vanadium-titanium-magnetite concentrate and alkali leaching technology is applied in the field of re-selecting vanadium-titanium-magnetite concentrate by calcination, alkali leaching, desliming and gravity separation, and achieves the effects of improving the utilization factor of blast furnace, reducing emissions and reducing production cost

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

[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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  • Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, desliming and gravity concentration
  • Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, desliming and gravity concentration
  • Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, desliming and gravity concentration

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 Applications(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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