Method for recleaning vanadium-titanium magnetite concentrate by using alkaline leaching and grading

A technology of vanadium-titanium magnetite concentrate and alkali leaching, which is applied in blast furnaces, furnace types, furnaces, etc.

Active Publication Date: 2014-07-30
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-mentioned beneficiation methods, the technical problem to be solved by the present invention is to provide a low cost, high recovery quality and efficiency, simple process, and good operability to utilize alkali The method of leaching, grading and re-selecting 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 to reduce environmental pollution

Method used

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  • Method for recleaning vanadium-titanium magnetite concentrate by using alkaline leaching and grading
  • Method for recleaning vanadium-titanium magnetite concentrate by using alkaline leaching and grading
  • Method for recleaning vanadium-titanium magnetite concentrate by using alkaline leaching and grading

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]1) Alkaline leaching

[0030] The TFe content is 50.9%, TiO 2 content of 14.5%, SiO 2 The content is 3.62%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.40% and a S content of 0.58% is placed in a NaOH alkali solution with a mass concentration of 20%, and is subjected to alkali leaching reaction at a temperature of 280° C. for 4.0 hours, and the reactant is filtered to obtain a filtrate and Alkali leaching filter cake A, NaOH consumption 79kg / t feeds ore, and described filtrate is fed into recovery treatment system, and its chemical reaction formula is:

[0031]

[0032]

[0033]

[0034]

[0035]

[0036] 2) Grading

[0037] Add water to the alkali leaching filter cake A in step 1) to form an ore slurry with a mass concentration of 20% and feed it into the cyclone for classification, and classify the grit B and overflow C, and the grit B is the final iron concentrate with a TFe content of 60.2%. (SiO 2 The content is 0.80...

Embodiment 2

[0039] 1) Alkaline leaching

[0040] The TFe content is 53.5%, TiO 2 content of 11.3%, SiO 2 The content is 3.56%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 5.50% and a S content of 0.72% was placed in an 8% NaOH alkali solution, subjected to alkali leaching reaction at a temperature of 310° C. for 3.5 hours, and the reactant was filtered to obtain the filtrate and Alkali leaching filter cake A, NaOH consumption 75kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0041] 2) Grading

[0042] Add water to the alkali leaching filter cake A in step 1) to form an ore slurry with a mass concentration of 21% and feed it into the cyclone for classification, and classify the grit B and overflow C, and the grit B is the final iron concentrate with a TFe content of 63.1%. (SiO 2 The content is 0.53%, Al 2 o 3 content of 1.86%, S content of 0.01%), the overflow C is ...

Embodiment 3

[0044] 1) Alkaline leaching

[0045] The TFe content is 52.5%, TiO 2 content of 12.3%, SiO 2 The content is 3.95%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 5.48% and a S content of 0.69% is placed in a concentration of 30% N a In OH alkali solution, carry out alkali leaching reaction at 300°C for 2.5 hours, filter the reactants to obtain filtrate and alkali leaching filter cake A, the NaOH consumption is 80kg / t to feed the ore, and the filtrate is fed to the recovery treatment system , its chemical reaction formula is with embodiment 1.

[0046] 2) Grading

[0047] Add water to the alkali leaching filter cake A in step 1) to form an ore slurry with a mass concentration of 22% and feed it into the cyclone for classification, and classify the grit B and overflow C, and the grit B is the final iron concentrate with a TFe content of 64.5%. (SiO 2 The content is 0.52%, Al 2 o 3 content of 1.84%, S content of 0.01%), the overflow C is concentra...

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Abstract

The invention discloses a method for recleaning vanadium-titanium magnetite concentrate by using alkaline leaching and grading. The method comprises the following steps: putting the vanadium-titanium magnetite concentrate in aqueous alkali with the mass concentration of 5-52%, carrying out alkaline leaching reaction at the temperature of 280-370 DEG C for 0.5-5 hours, and filtering so as to obtain filtrate and alkaline leaching filter cakes A; adding water to the alkaline leaching filter cakes A so as to prepare ore pulp with the mass concentration of 20%-25%, feeding the ore pulp into a hydrocyclone, and grading so as to respectively obtain iron ore concentrate with the TFe content of 60-68% and the titanium concentrate with the TiO2 content of 35-50%. The method has the advantages that the high-efficiency grading of the vanadium-titanium magnetite concentrate is realized, the alkali consumption is low, the content of impurities such as Al and Si entering a blast furnace is reduced, especially, the content of detrimental impurities such as TiO2 and S is reduced, the utilization coefficient of the blast furnace is increased, the discharge amount of blast furnace slag is reduced, the iron smelting cost is reduced, the problems of high S content and serious pollution in a smelting process are solved, and meanwhile, the compressive utilization rate of titanium resources is increased.

Description

technical field [0001] The invention relates to a beneficiation process of vanadium-titanium magnetite concentrate, in particular to a method of utilizing alkali leaching, grading and re-selecting vanadium-titanium magnetite concentrate. 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-titanium magn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B34/12C21B5/00
Inventor 刘晓明鞠洪钢王俊山郭客朱大鹏陈巍宋仁峰王忠红
Owner ANSTEEL GRP MINING CO LTD
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