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Method for vanadium-titanium magnetite concentrate by using oxidization alkaline leaching, acid washing, desliming and reverse flotation

A vanadium titanomagnetite concentrate and oxidized alkali leaching technology is applied in the fields of utilizing oxidized alkali leaching, pickling, desliming and reverse flotation of vanadium titanomagnetite concentrate to achieve the effects of efficient separation, mild reaction conditions and reduced emissions

Inactive Publication Date: 2015-10-07
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] 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 using oxidation based on the effective combination of physical and chemical beneficiation methods. The method of alkali leaching, pickling, desliming and reverse flotation 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 vanadium-titanium magnetite concentrate by using oxidization alkaline leaching, acid washing, desliming and reverse flotation
  • Method for vanadium-titanium magnetite concentrate by using oxidization alkaline leaching, acid washing, desliming and reverse flotation
  • Method for vanadium-titanium magnetite concentrate by using oxidization alkaline leaching, acid washing, desliming and reverse flotation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) Oxidative alkaline leaching

[0042] The TFe content is 50.5%, TiO 2 The content is 14.4%, SiO 2 The content is 4.59%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.72% and a S content of 0.79% was placed in a NaOH alkali solution with a mass concentration of 10%, and 78psi of O 2 , then alkali leaching reaction at a temperature of 240°C for 45 minutes, the reactant was filtered to obtain the filtrate and alkali leaching filter cake A, the NaOH consumption was 78.1 kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0043] mFeTiO 3 +2NaOH mFeO↓+Na 2 O·(TiO 2 ) m ↓+H 2 O m≥1

[0044] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o

[0045] Al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o

[0046] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H 2 o

[0047] 3FeS 2 +6NaOH 3FeS↓+Na 2 SO 3 +2Na 2 S+3H 2 o

[0048] ...

Embodiment 2

[0066] 1) Oxidative alkaline leaching

[0067] The TFe content is 53.9%, TiO 2 The content is 10.9%, SiO 2 The content is 4.17%, Al 2 o 3The vanadium-titanium magnetite concentrate with a content of 4.08% and a S content of 0.59% was placed in a NaOH alkali solution with a mass concentration of 23%, and 82psi of O 2 , then alkali leaching reaction at a temperature of 330° C. for 1.0 hour, and the reactants were filtered to obtain the filtrate and alkali leaching filter cake A. The NaOH consumption was 81.0 kg / t for ore feeding, and the filtrate was fed into the recovery treatment system. Chemical reaction formula is with 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 1:3.5, and then place it in H2O with a mass concentration of 3.5%. 2 SO 4 , pickling at 80°C for 55 minutes, filtering the pickling reactants to obtain the filtrate and acid leaching filter cake B, ...

Embodiment 3

[0079] 1) Oxidative alkaline leaching

[0080] The TFe content is 52.3%, TiO 2 The content is 12.5%, SiO 2 The content is 3.38%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 5.14% and a S content of 0.72% is placed in a NaOH alkali solution with a mass concentration of 30%, and 101kg / t 给矿 H 2 o 2 , then alkali leaching reaction at a temperature of 220°C for 1.5 hours, the reactant was filtered to obtain the filtrate and alkali leaching filter cake A, the NaOH consumption was 84.3 kg / t to the ore, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0081] 2mFeTiO 3 +4NaOH+mH 2 o 2 mFe 2 o 3 ↓+2Na 2 O·(TiO 2 ) m ↓+(m+2)H 2 O m≥1

[0082] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o

[0083] al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o

[0084] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H 2 o

[0085] 3FeS 2 +6NaOH 3FeS↓+Na 2 SO ...

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Abstract

The invention relates to a method for a vanadium-titanium magnetite concentrate by using oxidization alkaline leaching, acid washing, desliming and reverse flotation. The method is characterized by comprising the following steps: the oxidization alkaline leaching is to put the vanadium-titanium magnetite concentrate into alkaline solution; an oxidizing agent is added to perform the alkaline leaching reaction for 0.5-2 hours, and is filtered to obtain filtrate and an alkaline leaching filter cake A; the alkaline leaching filter cake A is added with water to prepare pulp, is put in H2SO4 solution to wash by acid for 5-60 minutes at a temperature of 50-90 DEG C, and is filtered to obtain filtrate and acid leaching filter cake B; and the B is added with water to prepare pulp with the mass concentration of 30-35% for desliming and reverse flotation reselection to obtain an iron ore concentrate with the TFe content of 65-70% and a titanium ore concentrate with the TiO2 content of 60-75%. The method has the following advantages: the introduction of O2 or H2O2 in the oxidization alkaline leaching enables an S-contained compound to be oxidized, so that the reaction is accelerated, the reaction temperature is lowered, the reaction time is shortened, and the energy consumption and the equipment investment are largely reduced.

Description

technical field [0001] The invention relates to a beneficiation process of a vanadium-titanium magnetite concentrate, in particular to a method for utilizing oxidation alkali leaching, pickling, desliming and reverse flotation to concentrate a vanadium-titanium magnetite. 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...

Claims

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Application Information

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IPC IPC(8): B03B7/00C22B3/12
CPCB03B9/00C22B3/12
Inventor 裴学斌王绍燕郭客刘晓明巴红朱大鹏李肃宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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