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Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, classification and gravity concentration

A vanadium-titanium-magnetite concentrate and alkali leaching technology are applied in alkali leaching, classification and gravity separation to select vanadium-titanium-magnetite concentrate, and use the field of calcination to achieve the effects of reducing production cost, improving comprehensive utilization rate, and improving blast furnace utilization coefficient.

Active Publication Date: 2014-08-06
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 mineral processing methods, the technical problem to be solved by the present invention is to provide a low cost, high recovery quality and efficiency and good operability using calcination, alkali leaching, The method of classifying and re-selecting the vanadium-titanium magnetite concentrate realizes efficient separation of titanium and iron in the 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, while reducing NaOH or KOH consumption, reducing environmental pollution

Method used

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  • Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, classification and gravity concentration
  • Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, classification and gravity concentration
  • Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, classification and gravity concentration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Calcination

[0037] The TFe content is 52.3%, TiO 2 content of 14.0%, SiO 2 The content is 3.59%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 4.20% and a S content of 0.65% is added with CaO at a ratio of 1:0.11 by weight, and is calcined at a temperature of 1150°C for 35 minutes to form a calcined product A. The chemical reaction formula is:

[0038]

[0039] 2) Alkaline leaching

[0040] The calcined product A in step 1) is placed in a NaOH alkali solution with a mass concentration of 30%, and the alkali leaching reaction is carried out at a temperature of 300° C. for 2.5 hours, and the reactant is filtered to obtain the filtrate and the alkali leaching filter cake B, NaOH Consumption of 46kg / t is fed to the ore, and the filtrate is fed into the recovery treatment system, and its chemical reaction formula is:

[0041]

[0042]

[0043]

[0044]

[0045]

[0046] 3) Grading

[0047] Add water to the alkali leaching fil...

Embodiment 2

[0050] 1) Calcination

[0051] The TFe content is 52.2%, TiO 2 content of 13.8%, SiO 2 The content is 3.45%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 4.54% and a S content of 0.60% was added with CaO at a ratio of 1:0.11 by weight, and calcined at a temperature of 1150° C. for 35 minutes to form a calcined product A, whose chemical reaction formula is the same as in Example 1 .

[0052] 2) Alkaline leaching

[0053] The calcined product A in step 1) is placed in a NaOH alkali solution with a mass concentration of 15%, and the alkali leaching reaction is carried out at a temperature of 320° C. for 3.5 hours, and the reactant is filtered to obtain the filtrate and the alkali leaching filter cake B, NaOH Consumption 46kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0054] 3) Grading

[0055] Add water to the alkali leaching filter cake B in step 2) to form an...

Embodiment 3

[0058] 1) Calcination

[0059] The TFe content is 53.2%, TiO 2 content of 12.2%, SiO 2 The content is 4.25%, Al 2 o 3 Vanadium-titanium magnetite concentrate with a content of 4.40% and a S content of 0.71% was added with CaO at a ratio of 1:0.12 by weight, and calcined at a temperature of 1300°C for 30 minutes to form a calcined product A, whose chemical reaction formula is the same as in Example 1 .

[0060] 2) Alkaline leaching

[0061] The calcined product A in step 1) is placed in a NaOH alkali solution with a mass concentration of 40%, and the alkali leaching reaction is carried out at a temperature of 370°C for 1.5 hours, and the reactant is filtered to obtain the filtrate and the alkali leaching filter cake B, NaOH Consumption 45.5kg / t feeds ore, and described filtrate feeds recovery processing system, and its chemical reaction formula is the same as embodiment 1.

[0062] 3) Grading

[0063] Add water to the alkali leaching filter cake B in step 2) to form an o...

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Abstract

The invention discloses a method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, classification and gravity concentration. The method comprises the following steps that CaO is added to the vanadium-titanium magnetite concentrates, the mixture is calcined for 20 to 60 minutes at the temperature ranging from 800 DEG C to 1400 DEG C, and therefore a calcined product A is formed; the product A is placed in an alkaline solution, an alkaline leaching reaction is conducted for 0.5 to 5 hours, and filtrate and an alkaline leaching filter cake B are obtained through filtration; water is added to the alkaline leaching filter cake B, so that ore pulp is prepared and fed into a hydrocyclone for classification, and settling sand C and overflow D are obtained through classification; gravity concentration is conducted on the settling sand C, so that gravity concentrates E and gravity tailings F are obtained, the gravity concentrates E are final iron ore concentrates with the TFe content ranging from 63% to 68%, and the gravity tailings F are combined with the overflow D of the hydrocyclone, so that final titanium concentrates with the TiO2 content ranging from 50% to 60% are obtained. The method has the advantages that consumption of NaOH or KOH is reduced, the vanadium-titanium magnetite concentrates are efficiently screened, alkali consumption is low, the content of impurities such as Al and Si which enter a blast furnace is reduced, the problems of the high S content and serious pollution in the smelting process are solved, and meanwhile the comprehensive use 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 calcination, 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 r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B5/62B03B5/34
Inventor 吕建华刘炳宇鞠洪钢文孝廉郭客刘晓明王忠红宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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