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Vanadium-titanium magnetite concentrate re-concentration method achieved through oxidation alkaline leaching, acid pickling, desliming and gravity and magnetism

A vanadium titanomagnetite concentrate and oxidized alkali leaching technology, which is applied in desliming and gravity magnetic re-selection of vanadium titanomagnetite concentrate, pickling, and utilizing oxidized alkali leaching to achieve efficient separation, mild reaction conditions, and reduced emissions. Effect

Inactive Publication Date: 2015-11-04
ANSTEEL GRP MINING CO LTD
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  • Claims
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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 re-selection of vanadium-titanium magnetite concentrate achieves 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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  • Vanadium-titanium magnetite concentrate re-concentration method achieved through oxidation alkaline leaching, acid pickling, desliming and gravity and magnetism
  • Vanadium-titanium magnetite concentrate re-concentration method achieved through oxidation alkaline leaching, acid pickling, desliming and gravity and magnetism
  • Vanadium-titanium magnetite concentrate re-concentration method achieved through oxidation alkaline leaching, acid pickling, desliming and gravity and magnetism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 shown.

[0044] 1) Oxidative alkaline leaching

[0045] The TFe content is 51.0%, TiO 2 The content is 14.1%, SiO 2 The content is 4.57%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.79% and a S content of 0.77% is placed in a NaOH alkali solution with a mass concentration of 20%, and 22psi of O 2 , then alkali leaching reaction at a temperature of 230°C for 45 minutes, the reactant was filtered to obtain the filtrate and alkali leaching filter cake A, the NaOH consumption was 53.1 kg / t to the ore, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0046] 4mFeTiO 3 +8NaOH +mO 2 2mFe 2 o 3 ↓+4Na 2 O·(TiO 2 ) m ↓+4H 2 O m≥1

[0047] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o

[0048] Al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o

[0049] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H 2 o

[0050] 3FeS 2 +6NaOH...

Embodiment 2

[0066] Such as figure 1 shown.

[0067] 1) Oxidative alkaline leaching

[0068] The TFe content is 51.6%, TiO 2 The content is 13.9%, SiO 2 The content is 4.35%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.33% and a S content of 0.57% was placed in a NaOH alkali solution with a mass concentration of 27%, and 75psi of O 2, then alkali leaching reaction at a temperature of 315° C. for 1.0 hour, and the reactants were filtered to obtain the filtrate and alkali leaching filter cake A. The NaOH consumption was 83.4 kg / t for ore feeding, and the filtrate was fed into the recovery treatment system. Chemical reaction formula is with embodiment 1;

[0069] 2) pickling

[0070] Add water to the alkali leaching filter cake A in step 1) to make a slurry with a mass solid-to-liquid ratio of 1:4, and then place it in H2O with a mass concentration of 5%. 2 SO 4 In the solution, pickling at 80°C for 60 minutes, filtering the pickling reactants to obtain...

Embodiment 3

[0078] Such as figure 1 shown.

[0079] 1) Oxidative alkaline leaching

[0080] The TFe content is 52.6%, TiO 2 The content is 12.2%, SiO 2 The content is 3.35%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 5.37% and a S content of 0.71% is placed in a NaOH alkali solution with a mass concentration of 33%, and 59kg / t 给矿 H 2 o 2 , then alkali leaching reaction at a temperature of 255°C for 1.5 hours, and the reactants were filtered to obtain the filtrate and alkali leaching filter cake A. The NaOH consumption was 85.5 kg / t for ore feeding, 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 ...

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Abstract

The invention relates to a vanadium-titanium magnetite concentrate re-concentration method achieved through oxidation alkaline leaching, acid pickling, desliming and gravity and magnetism. The method is characterized by including the following steps that oxidation alkaline leaching is performed on vanadium-titanium magnetite concentrate, and the vanadium-titanium magnetite concentrate is placed in an alkaline solution; oxidization agents are added; then, an alkaline leaching reaction lasts for 0.5-2 h at the temperature of 220-330 DEG C; filtration is performed, and then filter liquor and alkaline leached filter cakes A are obtained; water is added in the alkaline leached filter cakes A, and ore pulp is prepared; then, the ore pulp is placed in a H2SO4 solution, and acid pickling is performed for 5-60 min at the temperature of 50-90 DEG C; filtration is performed, and filter liquor and acid leached filter cakes B are obtained; water is added into B, and ore pulp with the mass concentration being 30-35% can be prepared; and desliming and gravity and magnetism combined re-concentration is performed, and iron concentrate with the TFe content being 64-70% and titanium concentrate with the TiO2 content being 60-82% can be obtained respectively. The method has the beneficial effects that due to introduction of O2 or H2O2 during oxidation alkaline leaching, S compounds can be oxidized, the reaction is accelerated, the reaction temperature is lowered, the reaction time is shortened, and energy consumption and equipment investment are greatly reduced.

Description

technical field [0001] The invention relates to a beneficiation process of a vanadium-titanium magnetite concentrate, in particular to a method for re-selecting a vanadium-titanium magnetite concentrate by using oxidative alkali leaching, pickling, desliming and gravity magnetism. 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 ...

Claims

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Application Information

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IPC IPC(8): B03C1/30C22B3/12
Inventor 宋仁峰马普生朱大鹏韩晓东曹新全李化陈巍赵亮
Owner ANSTEEL GRP MINING CO LTD
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