Method for re-concentrating vanadium-titanium magnetite concentrate through alkaline leaching, acid pickling and magnetic separation

A vanadium-titanium-magnetite concentrate and magnetic separation technology is applied in the field of re-selection of vanadium-titanium magnetite concentrate by alkali leaching, pickling and magnetic separation, and achieves the effects of mild reaction conditions, reduced emissions, and reduced ironmaking costs.

Active Publication Date: 2014-08-06
ANSTEEL GRP MINING CO LTD
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  • Abstract
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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, pickling, magnetic separation and re-selection of vanadium-titanium magnetite concentrate realizes efficient separation of titanium and iron in vanadium-titanium magnetite concentrate, improves the grade of iron 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 re-concentrating vanadium-titanium magnetite concentrate through alkaline leaching, acid pickling and magnetic separation
  • Method for re-concentrating vanadium-titanium magnetite concentrate through alkaline leaching, acid pickling and magnetic separation
  • Method for re-concentrating vanadium-titanium magnetite concentrate through alkaline leaching, acid pickling and magnetic separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 shown.

[0037] 1) Alkaline leaching

[0038] The TFe content is 53.5%, TiO 2 content of 12.5%, SiO 2 The content is 3.05%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.95% and a S content of 0.82% is placed in a NaOH alkali solution with a mass concentration of 20%, and is subjected to alkali leaching reaction at a temperature of 300° C. for 2.0 hours, and the reactant is filtered to obtain a filtrate and Alkali leaching filter cake A, NaOH consumption 78kg / t feeds ore, and described filtrate is fed into recovery treatment system, and its chemical reaction formula is:

[0039]

[0040]

[0041]

[0042]

[0043]

[0044] 2) pickling

[0045] Add water to the alkali leaching filter cake A in step 1) to make a slurry with a mass solid-to-liquid ratio of 1:3, and then place it in 3% H 2 SO 4 In the solution, pickle at 70°C for 10 minutes, filter the pickling reactant to obtain the filtrate and acid leachi...

Embodiment 2

[0051] 1) Alkaline leaching

[0052] The TFe content is 51.2%, TiO 2 content of 11.1%, SiO 2 The content is 4.75%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.82% and a S content of 0.81% was placed in a NaOH alkali solution with a mass concentration of 30%, and was subjected to alkali leaching reaction at a temperature of 320° C. for 1.5 hours, and the reactant was filtered to obtain the filtrate and Precipitate (alkali leaching filter cake) A after filtration, NaOH consumption 80.5kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0053] 2) pickling

[0054] Add water to the alkali leaching filter cake A in step 1) to make a mass solid-to-liquid ratio of 1:5 ore slurry, then place the mass concentration of 8% H 2 SO 4 In the solution, acid wash at 55° C. for 55 minutes, and filter the pickling reactants to obtain filtrate and acid leaching filter cake B. ...

Embodiment 3

[0058] 1) Alkaline leaching

[0059] The TFe content is 52.9%, TiO 2 content of 11.7%, SiO 2 The content is 3.60%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 5.31% and a S content of 0.67% was placed in a NaOH alkali solution with a mass concentration of 8%, and was subjected to alkali leaching reaction at a temperature of 330°C for 3.0 hours, and the reactant was filtered to obtain the filtrate and Alkali leaching filter cake A, NaOH consumption 78kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0060] 2) pickling

[0061] Add water to the alkali leaching filter cake A in step 1) to make a slurry with a mass solid-to-liquid ratio of 1:8, and then place it in 4% H 2 SO 4 In the solution, acid wash at 90° C. for 5 minutes, and filter the pickling reactants to obtain the filtrate and acid leaching filter cake B. The filtrate is fed into the recovery treatmen...

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Abstract

The invention discloses a method for re-concentrating vanadium-titanium magnetite concentrate through alkaline leaching, acid pickling and magnetic separation. The method comprises the following steps: placing the vanadium-titanium magnetite concentrate in an alkali solution of which the mass concentration is 5-52% to be subjected to alkaline leaching reaction at the temperature of 280-370 DEG C for 0.5-5 hours, and filtering to obtain a filtrate and an alkaline leached filter cake A; preparing the filter cake A into ore pulp by adding water according to the fact that the mass ratio of solid to liquid is 1:(1-10), placing the ore pulp into an H2SO4 solution of which the mass concentration is 1-10% to be subjected to acid pickling at the temperature of 50-90 DEG C for 5-60 minutes, and filtering to obtain a filtrate and an acid picked filter cake B; preparing the filter cake B into ore pulp of which the mass concentration is 30-35% by adding water to be subjected to magnetic separation, so as to obtain iron ore concentrate of which the TFe content is 64-68% and titanium concentrate of which the TiO2 content is 40-60%. The method has the advantages that the vanadium-titanium magnetite concentrate can be efficiently sorted, the alkali consumption is low, the content of impurities such as Al and Si entering a blast furnace, especially the content of detrimental impurities such as TiO2 and S, is reduced, the utilization coefficient of the blast furnace is increased, the iron-making cost is reduced, the problem of high S content in the smelting process is solved, and the comprehensive utilization ratio of a titanium resource is increased at the same time.

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 alkali leaching, pickling 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 ore and vanadiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/12C22B3/22C22B34/12
Inventor 邵安林鞠洪钢李维兵陈巍高国英姜明仙王忠彦宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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