Method for recleaning vanadium-titanium magnetite concentrate by calcining, alkaline leaching and desliming

A technology of vanadium-titanium magnetite concentrate and alkaline leaching, which is applied to blast furnaces, furnace types, furnaces, etc., to achieve the effects of improving the utilization factor of blast furnaces, reducing specific gravity, and reducing emissions

Active Publication Date: 2014-07-30
ANSTEEL GRP MINING CO LTD
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  • 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 using calcination, alkali leaching and The method of desliming and re-selecting the vanadium-titanium magnetite concentrate realizes efficient separation of titanium and iron in the 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 vanadium-titanium magnetite concentrate by calcining, alkaline leaching and desliming
  • Method for recleaning vanadium-titanium magnetite concentrate by calcining, alkaline leaching and desliming
  • Method for recleaning vanadium-titanium magnetite concentrate by calcining, alkaline leaching and desliming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Calcination

[0033] The TFe content is 53.5%, TiO 2 content of 11.6%, SiO 2 The content is 3.35%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 4.10% and a S content of 0.70% is added with CaO in a ratio of 1:0.1 by weight, and is calcined at a temperature of 900°C for 50 minutes to form a calcined product A. The chemical reaction formula is:

[0034]

[0035] 2) Alkaline leaching

[0036] The calcined product A in step 1) is placed in a NaOH alkali solution with a mass concentration of 23%, and the alkali leaching reaction is carried out at a temperature of 300° C. for 4 hours, and the reactant is filtered to obtain the filtrate and the alkali leaching filter cake B, NaOH Consumption of 46.8kg / t is fed to the ore, and the filtrate is fed into the recovery treatment system, and its chemical reaction formula is:

[0037]

[0038]

[0039]

[0040]

[0041]

[0042] 3) Desliming

[0043] The alkali leaching filter cake B in...

Embodiment 2

[0045] 1) Calcination

[0046] The TFe content is 53.0%, TiO 2 content of 12.8%, SiO 2 The content is 3.42%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 5.36% and a S content of 0.69% was added with CaO at a ratio of 1:0.12 by weight, and calcined at a temperature of 1000°C for 45 minutes to form a calcined product A, whose chemical reaction formula is the same as in Example 1 .

[0047] 2) Alkaline leaching

[0048] 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 365° C. for 5 hours, and the reactant is filtered to obtain the filtrate and the alkali leaching filter cake B, NaOH Consumption 58.2kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0049] 3) Desliming

[0050] The alkali leaching filter cake B in step 2) is added with water...

Embodiment 3

[0052] 1) Calcination

[0053] The TFe content is 53.6%, TiO 2 content of 12.2%, SiO 2 The content is 4.21%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 5.38% and a S content of 0.63% was added with CaO at a ratio of 1:0.13 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 .

[0054] 2) Alkaline leaching

[0055] 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 310° C. for 2.5 hours, and the reactant is filtered to obtain the filtrate and the alkali leaching filter cake B, NaOH Consumption 50kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0056] 3) Desliming

[0057] Add water to the alkali leaching filter cake B in step 2) to prepa...

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Abstract

The invention discloses a method for recleaning vanadium-titanium magnetite concentrate by calcining, alkaline leaching and desliming. The method comprises the following steps: adding CaO into vanadium-titanium magnetite concentrate and calcining for 20-60 minutes at 800-1400 DEG C to form a calcined product A; and putting A in aqueous alkali, carrying out alkaline leaching reaction for 0.5-5 hours at 300-370 DEG C, and filtering to obtain a filtrate and a filtered alkaline leached filter cake B, and adding water into B to prepare pulp to be deslimed to obtain settled sands C and overflow D, wherein the settled sands C are the final iron ore concentrates with the TFe content range of 60-68% and the overflow D is the final titanium concentrate with the TiO2 content range of 40-50%. The method disclosed by the invention has the advantages that the consumption of NaOH or KOH is reduced, the vanadium-titanium magnetite concentrate is efficiently sorted, the alkaline consumption is low, the content of impurities such as Al and Si entering into a blast furnace is reduced, the utilization coefficient of the blast furnace is improved, the iron smelting cost is reduced, and the problem of severe pollution is solved; meanwhile, the comprehensive utilization ratio 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 and desliming. 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-titan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B34/12C21B5/00
Inventor 刘晓明张颖李之奇巴红刘政东赵亮郭客宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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