Method for recleaning of vanadium-titanium magnetite concentrate by using alkaline leaching, grading and magnetic separation

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

Active Publication Date: 2014-07-30
ANSTEEL GRP MINING CO LTD
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  • 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 to utilize alkali The method of leaching, grading, magnetic separation and re-selection of 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 recleaning of vanadium-titanium magnetite concentrate by using alkaline leaching, grading and magnetic separation
  • Method for recleaning of vanadium-titanium magnetite concentrate by using alkaline leaching, grading and magnetic separation
  • Method for recleaning of vanadium-titanium magnetite concentrate by using alkaline leaching, grading and magnetic separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 shown.

[0037] 1) Alkaline leaching

[0038] The TFe content is 50.3%, TiO 2 content of 14.9%, SiO 2 The content is 4.95%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.98% and a S content of 0.82% is placed in a NaOH alkali solution with a mass concentration of 25%, and is subjected to alkali leaching reaction at a temperature of 360° C. for 3 hours, and the reactant is filtered to obtain a filtrate and Alkali leaching filter cake A, NaOH consumption 83kg / t is fed to ore, and described filtrate is fed into recovery treatment system, and its chemical reaction formula is:

[0039]

[0040] 2) Grading

[0041] Add water to the alkali leaching filter cake A in step 1) to form an ore slurry with a mass concentration of 20% and feed it into a cyclone for classification, and classify the grit B and overflow C.

[0042] 3) Magnetic separation

[0043] The grit B in the step 2) is added with water to make a mass concentrat...

Embodiment 2

[0045] Such as figure 1 shown.

[0046] 1) Alkaline leaching

[0047] The TFe content is 51.6%, TiO 2 content of 13.7%, SiO 2 The content is 4.88%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.96% and a S content of 0.78% is placed in a NaOH alkali solution with a mass concentration of 15%, and is subjected to alkali leaching reaction at a temperature of 310° C. for 2 hours, and the reactant is filtered to obtain a filtrate and Alkali leaching filter cake A, NaOH consumption 80kg / t is fed to ore, and described filtrate is fed into recovery treatment system, and its chemical reaction formula is the same as embodiment 1.

[0048] 2) Grading

[0049] Add water to the alkali leaching filter cake A in step 1) to form an ore slurry with a mass concentration of 21% and feed it into a cyclone for classification, and classify the grit B and overflow C.

[0050] 3) Magnetic separation

[0051] The grit B in the step 2) is added with water to make a ma...

Embodiment 3

[0053] Such as figure 1 shown.

[0054] 1) Alkaline leaching

[0055] The TFe content is 50.6%, TiO 2 content of 14.3%, SiO 2 The content is 4.55%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.68% and a S content of 0.72% is placed in a NaOH alkali solution with a mass concentration of 45%, and is subjected to alkali leaching reaction at a temperature of 290° C. for 4 hours, and the reactant is filtered to obtain a filtrate and Alkali leaching filter cake A, NaOH consumption 89kg / t feeds ore, and described filtrate feeds recovery treatment system, and its chemical reaction formula is the same as embodiment 1.

[0056] 2) Grading

[0057] Add water to the alkali leaching filter cake A in step 1) to form an ore slurry with a mass concentration of 22% and feed it into a cyclone for classification, and classify the grit B and overflow C.

[0058] 3) Magnetic separation

[0059] The grit B in step 2) is added with water to make a mass concentrati...

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Abstract

The invention discloses a method for recleaning of a vanadium-titanium magnetite concentrate by using alkaline leaching, grading and magnetic separation. The method comprises the following steps of placing the vanadium-titanium magnetite concentrate into alkali solution with the mass concentration of 5-52%, reacting for 0.5-5 hours in an alkaline leaching mode at 280-370 DEG C, and filtering to obtain filtrate and an alkaline leaching filter cake A; adding water into A to make mine pulp with the mass concentration of 20-25% and feeding into a swirler for grading to obtain overflows and setting sand B; adding water into B to make mine pulp with the mass concentration of 30-36% and performing magnetic separation to obtain final iron ore concentrate with the TFe content range being 63-68% and final titanium concentrate with the TiO2 content range being 35-50%. The method has the advantages that the efficient separation for the vanadium-titanium magnetite concentrate is realized, the alkaline consumption is low, the contents of impurities such as Al and Si, particularly harmful impurities of TiO2 and S, which enter a blast furnace are reduced, the use coefficient of the blast furnace is improved, the discharge of blast furnace slag is reduced, the puddling cost is reduced, and the problems of high S content and severe pollution in the smelting process are solved; the comprehensive use rate of the 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 alkali leaching, classification and magnetic separation. 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 and v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03C1/30
Inventor 宋仁峰郭客刘政东韩晓东曹新全李化朱大鹏刘晓明
Owner ANSTEEL GRP MINING CO LTD
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