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Vanadium-titanium magnetite concentrate recleaning method realized through alkaline leaching, acid pickling, desliming and combined gravity-magnetic separation

A vanadium-titanium-magnetite concentrate and alkali leaching technology is applied in desliming and combined gravity and magnetic separation of vanadium-titanium-magnetite concentrate, pickling, and alkali leaching to achieve mild reaction conditions, reduce emissions, and reduce ironmaking costs Effect

Active Publication Date: 2014-08-06
ANSTEEL GRP MINING CO LTD
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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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  • Vanadium-titanium magnetite concentrate recleaning method realized through alkaline leaching, acid pickling, desliming and combined gravity-magnetic separation
  • Vanadium-titanium magnetite concentrate recleaning method realized through alkaline leaching, acid pickling, desliming and combined gravity-magnetic separation
  • Vanadium-titanium magnetite concentrate recleaning method realized through alkaline leaching, acid pickling, desliming and combined gravity-magnetic separation

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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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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