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Method for magnetic separation of vanadium-titanium magnetite concentrate through forging, oxidative alkaline leaching and de-sliming

A technology of vanadium-titanium magnetite concentrate and oxidative alkali leaching, which is applied in the field of calcination, desliming and magnetic separation of vanadium-titanium magnetite concentrate, oxidative alkali leaching, to improve the utilization factor of blast furnace, improve the comprehensive utilization rate, and reduce the cost of ironmaking Effect

Inactive Publication Date: 2015-10-07
ANSTEEL GRP MINING CO LTD
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  • Claims
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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 and good operability on the basis of an effective combination of physical and chemical beneficiation methods. The methods of desliming, desliming and magnetic separation of vanadium-titanium magnetite concentrate have realized the efficient separation of titanium and iron in the vanadium-titanium magnetite concentrate, improved the iron grade before entering the furnace, and reduced the TiO entering into 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, while reducing NaOH or KOH consumption, reducing environmental pollution

Method used

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  • Method for magnetic separation of vanadium-titanium magnetite concentrate through forging, oxidative alkaline leaching and de-sliming
  • Method for magnetic separation of vanadium-titanium magnetite concentrate through forging, oxidative alkaline leaching and de-sliming
  • Method for magnetic separation of vanadium-titanium magnetite concentrate through forging, oxidative alkaline leaching and de-sliming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Such as figure 1 shown

[0046] 1) Calcination

[0047] The TFe content is 50.7%, TiO 2 The content is 13.5%, SiO 2 The content is 3.38%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 4.22% and a S content of 0.65% is added with CaO at a ratio of 1:0.1 by weight, and is calcined at a temperature of 900°C for 50 minutes to form a calcined product A. The chemical reaction formula is:

[0048] CaO + TiO 2 CaTiO 3

[0049] 2) Oxidative alkaline leaching

[0050] The calcined product A in step 1) is placed in the NaOH alkali solution that mass concentration is 42%, feeds the O of 84psi 2 , then alkali leaching reaction at a temperature of 220°C for 100 minutes, the reactant was filtered to obtain the filtrate and alkali leaching filter cake B, the NaOH consumption was 46.2 kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:

[0051] 4mFeTiO 3 +8NaOH +mO 2 2mFe 2 o ...

Embodiment 2

[0065] Such as figure 1 shown.

[0066] 1) Calcination

[0067] The TFe content is 52.2%, TiO 2 The content is 12.5%, SiO 2 The content is 3.43%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 5.44% and a S content of 0.65% was added with CaO at a ratio of 1:0.12 by weight, and calcined at a temperature of 1000°C for 45 minutes to form a calcined product A, whose chemical reaction formula is the same as in Example 1 .

[0068] 2) Oxidative alkaline leaching

[0069] The calcined product A in step 1) is placed in the NaOH alkali solution that the mass concentration is 12%, and the O of 101psi is passed into 2, then alkali leaching reaction at a temperature of 330°C for 2.0 hours, and the reactants were filtered to obtain the filtrate and alkali leaching filter cake B. The NaOH consumption was 26.2 kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which Chemical reaction formula is with embodiment 1;

[0070] 3) Des...

Embodiment 3

[0076] Such as figure 1 shown.

[0077] 1) Calcination

[0078] The TFe content is 53.5%, TiO 2 The content is 12.2%, SiO 2 The content is 4.21%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 5.62% and a S content of 0.64% was added with CaO at a ratio of 1:0.13 by weight, and calcined at a temperature of 800°C for 40 minutes to form a calcined product A, whose chemical reaction formula is the same as in Example 1 ;

[0079] 2) Oxidative alkaline leaching

[0080] Put the calcined product A in step 1) in a NaOH alkali solution with a mass concentration of 30%, and add 83kg / t 给矿 H 2 o 2 , then alkali leaching reaction at a temperature of 280°C for 1.0 hour, the reactants were filtered to obtain the filtrate and alkali leaching filter cake B, the NaOH consumption was 39.7 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 ↓+...

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Abstract

The invention relates to a method for magnetic separation of vanadium-titanium magnetite concentrate through forging, oxidative alkaline leaching and de-sliming. The method includes the following steps that CaO is added into the vanadium-titanium magnetite concentrate according to the weight proportion of 1 to 0.1-0.2, and forging is performed at the temperature ranging from 800 DEG C to 1400 DEG C; the forged product A is placed in an alkaline solution with the mass concentration being 5-52%; an oxidizing agent is added, then an alkaline leaching reaction is carried out for 0.5-2.0 hours at the temperature of 220-330 DEG C, and filtered liquid and an alkaline leaching filter cake B are obtained; and the filter cake B is de-slimed and magnetically separated. The method has the advantages that a compound containing S is oxidized by introducing O2 or H2O2 during oxidative alkaline leaching, the reaction is accelerated, the reaction temperature is lowered, and the reaction time is shortened; besides, iron concentrate with the content of TFe being 64-69% and titanium concentrate with the content of TiO2 being 36-52% are graded, the content of impurities, such as TiO2, S, Si and Al, entering a blast furnace is reduced, the utilization coefficient of the blast furnace is increased, and meanwhile the comprehensive utilization rate of titanium resources is increased.

Description

technical field [0001] The invention relates to a beneficiation process of a vanadium-titanium magnetite concentrate, in particular to a method of utilizing calcination, oxidation alkali leaching, desliming and magnetic separation of vanadium-titanium magnetite concentrate. 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 magneti...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B3/12B03C1/30
Inventor 刘政东赵亮刘晓明王珂郭客陈巍王忠红宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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