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

A technology of vanadium-titanium magnetite concentrate and alkali leaching, which is applied in chemical instruments and methods, solid separation, wet separation, etc., to achieve the effects of improving comprehensive utilization rate, improving blast furnace utilization factor and reducing emissions

Active Publication Date: 2016-05-04
ANSTEEL GRP MINING CO LTD
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  • Summary
  • 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, gravity separation and re-election of vanadium-titanium magnetite concentrate realizes the efficient separation of titanium and iron in vanadium-titanium magnetite concentrate, improves the iron grade 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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  • The method of re-selecting vanadium-titanium magnetite concentrate by alkali leaching, classification and gravity separation
  • The method of re-selecting vanadium-titanium magnetite concentrate by alkali leaching, classification and gravity separation
  • The method of re-selecting vanadium-titanium magnetite concentrate by alkali leaching, classification and gravity separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 shown.

[0034] 1) Alkaline leaching

[0035] The TFe content is 50.9%, TiO 2 content of 15.0%, SiO 2 The content is 3.60%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.22% and a S content of 0.61% is placed in a NaOH alkali solution with a mass concentration of 30%, and is subjected to alkali leaching reaction at a temperature of 260° C. for 2 hours, and the reactant is filtered to obtain the filtrate and Alkali leaching filter cake A, NaOH consumption 78kg / t feeds ore, and described filtrate is fed into recovery treatment system, and its chemical reaction formula is:

[0036]

[0037]

[0038]

[0039]

[0040]

[0041] 2) Grading

[0042] 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.

[0043] 3) re-election

[0044] Add water to the grit B in step 2...

Embodiment 2

[0046] Such as figure 1 shown.

[0047] 1) Alkaline leaching

[0048] The TFe content is 51.2%, TiO 2 content of 14.3%, SiO 2 The content is 3.15%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.21% and a S content of 0.61% is placed in a NaOH alkali solution with a mass concentration of 10%, and is subjected to alkali leaching reaction at a temperature of 330° C. for 3 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.

[0049] 2) Grading

[0050] Add water to the alkali leaching filter cake A in step 1) to form an ore slurry with a mass concentration of 24% and feed it into a cyclone for classification, and classify the grit B and overflow C.

[0051] 3) re-election

[0052] Add water to the grit B in step 2) to make ore pulp with a mass co...

Embodiment 3

[0054] Such as figure 2 shown.

[0055] 1) Alkaline leaching

[0056] The TFe content is 53.7%, TiO 2 content of 11.2%, SiO 2 The content is 3.85%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.49% and a S content of 0.60% is placed in a NaOH alkali solution with a mass concentration of 40%, and is subjected to alkali leaching reaction at a temperature of 370° C. for 1 hour, and the reactant is filtered to obtain a filtrate and Alkali leaching filter cake A, NaOH consumption 83kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0057] 2) Grading

[0058] Add water to the alkali leaching filter cake A in step 1) to form an ore slurry with a mass concentration of 23% and feed it into a cyclone for classification, and classify the grit B and overflow C.

[0059] 3) re-election

[0060] The grit B in the step 2) is added with water to make a mass concentration ...

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Abstract

The invention discloses a vanadium-titanium magnetite concentrate recleaning method realized through alkaline leaching, classification and gravity separation. The method comprises the steps of placing vanadium-titanium magnetite concentrate in aqueous alkali with a mass concentration of 5%-52% for alkaline leaching reaction at a temperature between 260 DEG C and 370 DEG C for 0.5 h - 5 h and conducting filtering to obtain a filtrate and an alkaline leached filter cake A; adding water into A and feeding the mixture into a cyclone for classification to obtain set sand B and effused flow C; adding water into B to obtain pulp with a mass concentration of 35%-40%, and conducting gravity separation to obtain iron ore concentrate with the TFe content ranging from 63% to 68% and titanium concentrate with the TiO2 content ranging from 50% to 60%. The method has the advantages that efficient sorting of the vanadium-titanium magnetite concentrate is realized, alkali consumption is low, the content of impurities such as Al and Si entering a blast furnace is reduced, the content of detrimental impurities TiO2 and S is reduced especially, the utilization coefficient of the blast furnace is increased, blast furnace slag emission is reduced, iron-making cost is reduced, the problems of high S content and severe pollution in the smelting process are solved, and the comprehensive utilization rate of titanium resources is increased.

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 gravity 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 va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03B5/62B03B5/34
Inventor 孟劲松王俊山刘炳宇刘晓明王忠红赵亮宋仁峰全名威
Owner ANSTEEL GRP MINING CO LTD
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