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Method for reselecting vanadium-titanium magnetite concentrate by using oxidization alkaline leaching, classification and reverse flotation

A technology of vanadium-titanium magnetite concentrate and oxidation alkali leaching, which is applied in chemical instruments and methods, solid separation, wet separation, etc., to achieve the effects of improving comprehensive utilization, reducing emissions, and high-efficiency separation

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

[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 using oxidation The method of alkali leaching, classification and reverse flotation to re-select vanadium-titanium magnetite concentrate has realized efficient separation of titanium and iron in vanadium-titanium magnetite concentrate, improved the grade of iron before entering the furnace, and reduced 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 reselecting vanadium-titanium magnetite concentrate by using oxidization alkaline leaching, classification and reverse flotation
  • Method for reselecting vanadium-titanium magnetite concentrate by using oxidization alkaline leaching, classification and reverse flotation
  • Method for reselecting vanadium-titanium magnetite concentrate by using oxidization alkaline leaching, classification and reverse flotation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 as shown,

[0040] 1) Oxidative alkaline leaching

[0041] The TFe content is 53.6%, TiO 2 The content is 11.9%, SiO 2 The content is 5.12%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.94% and a S content of 0.83% is placed in a NaOH alkali solution with a mass concentration of 23%, and 32psi of O 2 , then alkali leaching reaction at a temperature of 320° C. for 1.0 hour, and the reactants were filtered to obtain the filtrate and alkali leaching filter cake A. The NaOH consumption was 81.4 kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0042] 4mFeTiO 3 +8NaOH +mO 2 2mFe 2 o 3 ↓+4Na 2 O·(TiO 2 ) m ↓+4H 2 O m≥1

[0043] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o

[0044] Al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o

[0045] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H 2 o

[0046] 3...

Embodiment 2

[0059] 1) Oxidative alkaline leaching

[0060] The TFe content is 51.3%, TiO 2 The content is 13.8%, SiO 2 The content is 4.87%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 5.05% and a S content of 0.74% was placed in a NaOH alkali solution with a mass concentration of 14%, and 98psi of O 2 , then alkali leaching reaction at a temperature of 250°C for 75 minutes, the reactant was filtered to obtain the filtrate and alkali leaching filter cake A, the NaOH consumption was 78.5kg / t to the ore, and the filtrate was fed into the recovery treatment system, which Chemical reaction formula is with embodiment 1;

[0061] 2) Grading

[0062] Add water to the medium-alkali leaching filter cake A in step 1) to form a slurry with a mass concentration of 20% and put it into the cyclone for classification, and classify the grit B and overflow Y;

[0063] 3) Anti-flotation

[0064] with H 2 SO 4 It is the activator and pH adjuster of titanium compounds, the...

Embodiment 3

[0071] 1) Oxidative alkaline leaching

[0072] The TFe content is 52.4%, TiO 2 The content is 12.5%, SiO 2 The content is 4.65%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.61% and a S content of 0.74% is placed in a NaOH alkali solution with a mass concentration of 43%, and 91kg / t 给矿 H 2 o 2 , then alkali leaching reaction at a temperature of 235° C. for 1.5 hours, and the reactants were filtered to obtain the filtrate and alkali leaching filter cake A. The NaOH consumption was 87.6 kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0073] 2mFeTiO 3 +4NaOH+mH 2 o 2 mFe 2 o 3 ↓+2Na 2 O·(TiO 2 ) m ↓+(m+2)H 2 O m≥1

[0074] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o

[0075] al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o

[0076] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H 2 o

[0077] 3FeS 2 +6NaOH 3Fe...

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Abstract

The invention relates to a method for reselecting a vanadium-titanium magnetite concentrate by using oxidization alkaline leaching, classification and reverse flotation. The method comprises the following steps: the vanadium-titanium magnetite concentrate is put into alkaline solution; an oxidizing agent is added to perform the alkaline leaching reaction for 0.5-2 hours at a temperature of 220-330 DEG C; a reactant is filtered to obtain filtrate and an alkaline leaching filter cake A; and the alkaline leaching filter cake A is added with water to prepare pulp to perform the classification and the reverse flotation reselection operation. 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 time is shortened, and the reaction temperature, the energy consumption and the equipment investment are reduced; and as an iron ore concentrate with the TFe content of 65-70% and a titanium ore concentrate with the TiO2 content of 50-70% are selected out, the high-efficiency titanium and iron separation of the vanadium-titanium magnetite concentrate is realized, the contents of such impurities as TiO2, S, Si and Al entering a blast furnace are reduced, the utilization coefficient of the blast furnace is increased, and the comprehensive utilization rate of a titanium resource 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 leaching with oxidation alkali, grading 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00C22B3/12
CPCB03B9/00C22B3/12Y02P10/20
Inventor 郭客马旭峰巴红张志强李之奇刘政东陈巍宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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