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Method for re-selecting vanadium-titanium magnetite concentrate by alkali leaching, pickling, desliming and gravity-magnetism

A vanadium-titanium magnetite concentrate and alkali leaching technology, applied in chemical instruments and methods, wet separation, solid separation and other directions, to achieve the effects of low cost, improved blast furnace utilization coefficient, and improved comprehensive utilization rate

Active Publication Date: 2016-02-03
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, pickling, desliming and gravity-magnetism combined re-selection of vanadium-titanium magnetite concentrate achieves 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-selecting vanadium-titanium magnetite concentrate by alkali leaching, pickling, desliming and gravity-magnetism
  • Method for re-selecting vanadium-titanium magnetite concentrate by alkali leaching, pickling, desliming and gravity-magnetism
  • Method for re-selecting vanadium-titanium magnetite concentrate by alkali leaching, pickling, desliming and gravity-magnetism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 shown.

[0043] 1) Alkaline leaching

[0044] The TFe content is 51.3%, TiO 2 content of 13.7%, SiO 2 The content is 4.55%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.71% and a S content of 0.79% is placed in a NaOH alkali solution with a mass concentration of 15%, and is subjected to alkali leaching reaction at a temperature of 300° C. for 1.5 hours, and the reactant is filtered to obtain a filtrate and Alkali leaching filter cake A, NaOH consumption 72kg / t feeds ore, and described filtrate is fed into recovery treatment system, and its chemical reaction formula is:

[0045]

[0046] 2) pickling

[0047] Add water to the alkali leaching filter cake A in step 1) to make a mass solid-liquid ratio of 1: 1.5 ore pulp, then place the mass concentration of 2% H 2 SO 4 In the solution, pickling at 70°C for 8 minutes, filtering the pickling reactants to obtain the filtrate and acid leaching filter cake B, the filtrate i...

Embodiment 2

[0056] Such as figure 1 shown.

[0057] 1) Alkaline leaching

[0058] The TFe content is 51.1%, TiO 2 content of 14.2%, SiO 2 The content is 3.95%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.19% and a S content of 0.58% 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 2.5 hours, and the reactant is filtered to obtain a filtrate and Alkali leaching filter cake A, NaOH consumption 82kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0059] 2) pickling

[0060] Add water to the alkali leaching filter cake A in step 1) to make a slurry with a mass solid-to-liquid ratio of 1:2.6, and then place the mass concentration in 3% H 2 SO 4 In the solution, acid wash at 75° C. for 60 minutes, and filter the pickling reactants to obtain the filtrate and acid leaching filte...

Embodiment 3

[0068] Such as figure 1 shown.

[0069] 1) Alkaline leaching

[0070] The TFe content is 52.1%, TiO 2 content of 12.6%, SiO 2 The content is 3.05%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 5.31% and a S content of 0.70% was placed in a NaOH alkali solution with a mass concentration of 32%, and was subjected to alkali leaching reaction at a temperature of 310° C. for 3.5 hours, and the reactant was filtered to obtain the 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 the same as embodiment 1.

[0071] 2) pickling

[0072] Add water to the alkali leaching filter cake A in step 1) to make a slurry with a mass solid-to-liquid ratio of 1:3.8, and then place it in 5% H 2 SO 4 In the solution, acid wash at 50° C. for 50 minutes, and filter the pickling reactants to obtain the filtrate and acid leaching filter cake...

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Abstract

The invention discloses a vanadium-titanium magnetite concentrate recleaning method realized through alkaline leaching, acid pickling, desliming and combined gravity-magnetic 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 280 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 to obtain pulp with the mass ratio of solid to liquid of 1:1-10, placing the pulp into an H2SO4 solution, conducting acid pickling for 5 min - 60 min at a temperature between 50 DEG C and 90 DEG C, and conducting filtering to obtain a filtrate and an acid leached filter cake B; conducting desliming on the acid leached filter cake B to obtain set sand C and effused flow D, adding water into the set sand C to obtain pulp with a mass concentration of 30%-41%, and conducting combined gravity-magnetic separation to obtain final iron ore concentrate with the TFe content ranging from 63% to 69% and titanium concentrate with the TiO2 content ranging from 60% to 82%. The method has the advantages that efficient sorting of the vanadium-titanium magnetite concentrate is realized, the content of impurities such as Al and Si entering a blast furnace is reduced, the utilization coefficient of the blast furnace is increased, 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 using alkali leaching, pickling, desliming and gravity-magnetism 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 ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03B5/62
Inventor 宋仁峰马普生朱大鹏曹新全韩晓东李化陈巍赵亮
Owner ANSTEEL GRP MINING CO LTD
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