Method for recleaning vanadium titanium magnetite concentrate by using alkaline leaching, pickling and reverse flotation

A technology of vanadium-titanium magnetite concentrate and reverse flotation, applied in chemical instruments and methods, wet separation, solid separation, etc., to achieve mild reaction conditions, improve comprehensive utilization, and reduce emissions

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, pickling, reverse flotation and re-election of vanadium-titanium magnetite concentrate has realized efficient separation of titan

Method used

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  • Method for recleaning vanadium titanium magnetite concentrate by using alkaline leaching, pickling and reverse flotation
  • Method for recleaning vanadium titanium magnetite concentrate by using alkaline leaching, pickling and reverse flotation
  • Method for recleaning vanadium titanium magnetite concentrate by using alkaline leaching, pickling and reverse flotation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Alkaline leaching

[0038] The TFe content is 51.0%, TiO 2 content of 13.8%, SiO 2 The content is 3.85%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.30% and a S content of 0.59% is placed in a NaOH alkali solution with a mass concentration of 50%, and is subjected to alkali leaching reaction at a temperature of 360° C. for 2.5 hours, and the reactant is filtered to obtain a filtrate and Alkali leaching filter cake A, NaOH consumption 81kg / t is fed to ore, and described filtrate is fed into recovery treatment system, and its chemical reaction formula is:

[0039] mFeTiO 3 +2NaOH mFeO↓+Na 2 O·(TiO 2 ) m ↓+H 2 O m≥1

[0040] pFe 3 o 4 ·q(FeO·TiO 2 )+2rNaOH pFe 3 o 4 ↓+qFeO↓+(Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o

[0041] Al 2 o 3 +2NaOH 2NaAlO 2 +H 2 o

[0042] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓+H 2 o

[0043] 3FeS 2 +6NaOH 3FeS↓+Na 2 SO 3 +2Na 2 S+3H 2 o

[0044] 2) pickling

[0045] Add water to the ...

Embodiment 2

[0055] 1) Alkaline leaching

[0056] The TFe content is 51.2%, TiO 2 content of 13.6%, SiO 2 The content is 3.85%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.31% and a S content of 0.59% is placed in a NaOH alkali solution with a mass concentration of 40%, and is subjected to alkali leaching reaction at a temperature of 300° C. for 3.5 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 feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0057] 2) pickling

[0058] Add water to the alkali leaching filter cake A in step 1) to make a slurry with a mass solid-to-liquid ratio of 1:5, and then place it in 4% H 2 SO 4 , pickling at 75°C for 30 minutes, and filtering the pickling reactants to obtain the filtrate and acid leaching filter cake B. The filtrate is fed into the recovery treatment system, and it...

Embodiment 3

[0066] 1) Alkaline leaching

[0067] The TFe content is 53.5%, TiO 2 content of 11.2%, SiO 2 The content is 3.25%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.39% and a S content of 0.61% was placed in a NaOH alkali solution with a mass concentration of 30%, and was subjected to alkali leaching reaction at a temperature of 350° C. for 1.5 hours, and the reactant was filtered to obtain the filtrate and Alkali leaching filter cake A, NaOH consumption 82kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0068] 2) pickling

[0069] 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 2% H 2 SO 4 , pickling at 70° C. for 50 minutes, and filtering the pickling reactants to obtain the filtrate and acid leaching filter cake B. The filtrate is fed into the recovery treatment system,...

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Abstract

The invention discloses a method for recleaning vanadium titanium magnetite concentrate by using alkaline leaching, pickling and reverse flotation. The method comprises the following steps: putting vanadium titanium magnetite concentrate into an alkaline solution of which the mass concentration is 5-52%; carrying out alkali leaching reaction at 280-370 DEG C for 0.5-5 hours; filtering to obtain filtrate and an alkali leaching filter cake A; adding water to A to prepare ore pulp of which the solid-liquid mass ratio is 1:(1-10), putting into an H2SO4 solution of which the mass concentration is 1-10%, picking at 50-90 DEG C for 5-60 minutes, and filtering to obtain filtrate and a pickling filter cake B; adding water to B to prepare ore pulp of which the mass concentration is 25-30%, carrying out reverse flotation, so as to respectively obtain iron ore concentrate of which the TFe content is 65-69.5% and titanium concentrate of which the TiO2 content is 40-80%. The method has the advantages that the vanadium titanium magnetite concentrate is efficiently sorted, the alkali consumption is low, such impurities entering a blast furnace as such as Al, Si, especially TiO2 and S, are reduced, the utilization coefficient of the blast furnace is improved, the discharge of blast furnace slag is reduced, the ironmaking cost is reduced, and meanwhile, the comprehensive utilization 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 alkali leaching, pickling and reverse flotation. 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-...

Claims

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Application Information

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IPC IPC(8): C22B3/12C22B3/08B03B7/00
Inventor 余自甦李之奇巴红刘政东郭客陈巍赵亮宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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