Method for re-concentrating vanadium-titanium magnetite concentrates by means of oxidized alkali leaching, acid pickling and reverse flotation

A vanadium-titanium-magnetite concentrate and oxidized alkali leaching technology is applied in flotation, process efficiency improvement, solid separation and other directions to achieve mild reaction conditions, reduce emissions, and reduce ironmaking costs.

Inactive Publication Date: 2015-09-16
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 The method of alkali leaching, pickling and reverse flotation to re-select vanadium-titanium magnetite concentrate realizes the 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 concentrates by means of oxidized alkali leaching, acid pickling and reverse flotation
  • Method for re-concentrating vanadium-titanium magnetite concentrates by means of oxidized alkali leaching, acid pickling and reverse flotation
  • Method for re-concentrating vanadium-titanium magnetite concentrates by means of oxidized alkali leaching, acid pickling and reverse flotation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) Oxidative alkaline leaching

[0040] The TFe content is 51.2%, TiO 2 The content is 14.1%, SiO 2 The content is 3.66%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.51% and a S content of 0.58% was placed in a NaOH alkali solution with a mass concentration of 49%, and 98psi of O 2 , then alkali leaching reaction at a temperature of 320°C for 1.5 hours, and the reactants were filtered to obtain the filtrate and alkali leaching filter cake A. The NaOH consumption was 80.2 kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0041] 4mFeTiO 3 +8NaOH +mO 2 2mFe 2 o 3 ↓+4Na 2 O·(TiO 2 ) m ↓+4H 2 O m≥1

[0042] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o

[0043] Al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o

[0044] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H 2 o

[0045] 3FeS 2 +6NaOH 3FeS↓+Na 2 SO 3 +2N...

Embodiment 2

[0060] 1) Oxidative alkaline leaching

[0061] The TFe content is 52.1%, TiO 2 The content is 13.6%, SiO 2 The content is 3.98%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.38% and a S content of 0.63% was placed in a NaOH alkali solution with a mass concentration of 41%, and 86psi of O 2 , then alkali leaching reaction at a temperature of 240°C for 2.0 hours, and the reactants were filtered to obtain the filtrate and alkali leaching filter cake A. The NaOH consumption was 78.5kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which Chemical reaction formula is with embodiment 1;

[0062] 2) pickling

[0063] 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 H2O with a mass concentration of 4.5%. 2 SO 4 , pickling at 70°C for 40 minutes, filtering the pickling reactants to obtain the filtrate and acid leaching filter cake ...

Embodiment 3

[0070] 1) Oxidative alkaline leaching

[0071] The TFe content is 53.7%, TiO 2 The content is 12.4%, SiO 2 The content is 3.45%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.29% and a S content of 0.66% is placed in a NaOH alkali solution with a mass concentration of 32%, and 196kg / t of 给矿 H 2 o 2 , then alkali leaching reaction at a temperature of 315°C for 0.5 hour, the reactant was filtered to obtain the filtrate and alkali leaching filter cake A, the NaOH consumption was 75.9 kg / t to the ore, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0072] 2mFeTiO 3 +4NaOH+mH 2 o 2 mFe 2 o 3 ↓+2Na 2 O·(TiO 2 ) m ↓+(m+2)H 2 O m≥1

[0073] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o

[0074] Al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o

[0075] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H 2 o

[0076] 3FeS 2 +6NaOH 3FeS↓+Na 2 S...

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Abstract

The invention relates to a method for re-concentrating vanadium-titanium magnetite concentrates by means of oxidized alkali leaching, acid pickling and reverse flotation. The method is characterized by comprising steps of leaching the vanadium-titanium magnetite concentrates by oxidized alkali, to be more specific, arranging the vanadium-titanium magnetite concentrates in the aqueous alkali, adding oxidizing agents into the aqueous alkali, enabling the vanadium-titanium magnetite concentrates to carry out alkali leaching reaction for 0.5-2 hours at the temperatures of 220-330 DEG C, filtering the aqueous alkali to obtain filter liquor and alkali leaching filter cake A, adding water into the alkali leaching filter cake A to obtain ore pulp, arranging the ore pulp in H<2>SO<4> liquor, washing the ore pulp by acid for 5-60 minutes at the temperatures of 50-90 DEG C, filtering the H<2>SO<4> liquor to obtain filter liquor and acid leaching filter cake B; adding water into the acid leaching filter cake B to obtain ore pulp with the mass concentration of 30-35%, and carrying out reverse flotation on the ore pulp to obtain iron concentrates with the TFe contents of 65-70% and titanium concentrates with the TiO<2> content of 40-80%. The method has the advantages that O<2> or H<2>O<2> is introduced when the vanadium-titanium magnetite concentrates are leached by the oxidized alkali, so that S compounds can be oxidized, reaction can be accelerated, the reaction temperatures can be lowered, the reaction time can be shortened, and energy consumption and equipment investment can be 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 oxidation 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 r...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03B1/04C22B3/12C22B3/08
CPCY02P10/20
Inventor 余自甦窦国语马普生刘政东郭客姜明仙王忠彦宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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