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The method of re-selecting vanadium-titanium magnetite concentrate by alkali leaching, desliming and magnetic gravity

A vanadium-titanium-magnetite concentrate and magnetic-gravity combined technology, which is applied in chemical instruments and methods, wet separation, solid separation, etc., to achieve the effects of improving comprehensive utilization, reducing ironmaking costs, and reducing emissions

Active Publication Date: 2017-01-11
ANSTEEL GRP MINING CO LTD
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  • 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 to utilize alkali The method of leaching, desliming and magnetic gravity combined re-selection of vanadium-titanium magnetite concentrate has realized the efficient separation of titanium and iron in 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 to reduce environmental pollution

Method used

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  • The method of re-selecting vanadium-titanium magnetite concentrate by alkali leaching, desliming and magnetic gravity
  • The method of re-selecting vanadium-titanium magnetite concentrate by alkali leaching, desliming and magnetic gravity
  • The method of re-selecting vanadium-titanium magnetite concentrate by alkali leaching, desliming and magnetic gravity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 shown.

[0040] 1) Alkaline leaching

[0041] The TFe content is 50.8%, TiO 2 content of 14.9%, SiO 2 The content is 4.96%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.87% and a S content of 0.82% is placed in a NaOH alkali solution with a mass concentration of 15%, and is subjected to alkali leaching reaction at a temperature of 370° C. for 3 hours, and the reactant is filtered to obtain a filtrate and Alkali leaching filter cake A, NaOH consumption 85kg / t is fed to ore, and described filtrate is fed into recovery treatment system, and its chemical reaction formula is:

[0042]

[0043] 2) Desliming

[0044] Add water to the alkali leaching filter cake A in step 1) to prepare a slurry with a mass concentration of 21%, and feed it into a ∮ 3.0-meter desliming hopper for desliming operation to obtain sand settling B and overflow C.

[0045] 3) Combined magnetic gravity beneficiation

[0046] Add water to the grit ...

Embodiment 2

[0049] Such as figure 1 shown.

[0050] 1) Alkaline leaching

[0051] The TFe content is 51.3%, TiO 2 content of 14.2%, SiO 2 The content is 4.71%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.99% and a S content of 0.83% is placed in an 8% NaOH alkali solution, subjected to alkali leaching reaction at a temperature of 280° C. for 4 hours, and the reactant is filtered to obtain a filtrate and Alkali leaching filter cake A, NaOH consumption 75kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0052] 2) Desliming

[0053] Add water to the alkali leaching filter cake A in step 1) to make a slurry with a mass concentration of 22%, and feed it into a ∮5.0m desliming hopper for desliming operation to obtain sand settling B and overflow C.

[0054] 3) Combined magnetic gravity beneficiation

[0055] Add water to the grit B in step 2) to make a slurry with a mass...

Embodiment 3

[0058] Such as figure 1 shown.

[0059] 1) Alkaline leaching

[0060] The TFe content is 52.7%, TiO 2 content of 13.1%, SiO 2 The content is 4.71%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.81% and a S content of 0.82% is placed in a concentration of 30% N a In OH alkaline solution, carry out alkali leaching reaction at 290°C for 5 hours, filter the reactants to obtain filtrate and alkali leaching filter cake A, the NaOH consumption is 85kg / t to feed the ore, and the filtrate is fed to the recovery treatment system , its chemical reaction formula is with embodiment 1.

[0061] 2) Desliming

[0062] Add water to the alkali leaching filter cake A in step 1) to prepare a slurry with a mass concentration of 23% and feed it into a ∮ 3.0-meter desliming hopper for desliming operation to obtain sand settling B and overflow C;

[0063] 3) Combined magnetic gravity beneficiation

[0064] Add water to the grit B in step 2) to make a slurry with a...

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Abstract

The invention discloses a method for recleaning of vanadium-titanium magnetite concentrates by utilizing alkaline leaching, desliming and magnetic-gravity combined separation. The method comprises the following steps of placing the vanadium-titanium magnetite concentrates into aqueous alkali with the mass concentration of 5-52%, carrying out alkaline leaching reaction at 280-370 DEG C for 0.5-5 hours and filtering to obtain filtrate and an alkaline leaching filter cake A; adding water to the A to prepare pulp with the mass concentration of 21-25% to carry out desliming operation so as to obtain sunk sand B and overflow C; adding water to the B to prepare pulp with the mass concentration of 30-41% to carry out magnetic-gravity combined recleaning so as to obtain iron ore concentrates with the TFe content of 63-68% and titanium ore concentrates with the TiO2 content of 50-70% respectively. The method has the advantages that the vanadium-titanium magnetite concentrates are effectively sorted, the alkali consumption is low, the content of impurities, such as Al and Si, in a blast furnace, in particular the content of detrimental impurities TiO2 and S, is reduced, the utilization coefficient of the blast furnace is increased, the discharge of the blast furnace slag is reduced, the iron making cost is reduced, the problems of high content of S and serious pollution in a smelting process are solved, and meanwhile, the comprehensive utilization rate of titanium resources 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 using alkali leaching, desliming and magnetic gravity combination. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00
Inventor 李之奇刘政东赵亮文孝廉陈巍郭客刘晓明宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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