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

A vanadium-titanium-magnetite concentrate and calcining technology is applied in the classification and re-selection of vanadium-titanium-magnetite concentrate, and in the fields of calcination and alkali leaching, to achieve the effects of improving comprehensive utilization rate, reducing emissions and small specific gravity

Active Publication Date: 2016-07-06
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 vanadium-titanium magnetite concentrate realizes 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, while reducing NaOH or KOH consumption, reducing environmental pollution

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) calcination

[0033] The TFe content is 51.3%, TiO 2 The content is 14.0%, SiO 2 The content is 3.66%, Al 2 O 3 A vanadium-titanium magnetite concentrate with a content of 4.42% and a S content of 0.55% is added with CaO at a weight ratio of 1:0.1 and calcined at a temperature of 1200°C for 30 minutes to form calcined product A. The chemical reaction formula is:

[0034]

[0035] 2) Alkali leaching

[0036] The calcined product A in step 1) is placed in a 20% NaOH alkali solution with a mass concentration of 20%, and the alkali leaching reaction is carried out at a temperature of 300°C for 3.0 hours. The reactants are filtered to obtain the filtrate and the alkali leaching filter cake B, NaOH Consumption of 47kg / t is fed to the ore, the filtrate is fed to the recovery treatment system, and its chemical reaction formula is:

[0037]

[0038]

[0039]

[0040]

[0041]

[0042] 3) Classification

[0043] Add water to the alkaline leaching filter cake B in step 2) to form a slur...

Embodiment 2

[0045] 1) calcination

[0046] The TFe content is 53.5%, TiO 2 The content is 11.3%, SiO 2 The content is 3.56%, Al 2 O 3 A vanadium-titanium magnetite concentrate with a content of 5.50% and an S content of 0.72% is added with CaO in a weight ratio of 1:0.11, and calcined at 1000°C for 45 minutes to form calcined product A. The chemical reaction formula is the same as that of Example 1. .

[0047] 2) Alkali leaching

[0048] The calcined product A in step 1) is placed in a NaOH alkali solution with a mass concentration of 10%, and subjected to an alkali leaching reaction at a temperature of 315°C for 3.0 hours. The reactants are filtered to obtain filtrate and alkali leaching filter cake B, NaOH Consumption of 45kg / t is fed to the ore, and the filtrate is fed to the recovery treatment system, and its chemical reaction formula is the same as in Example 1.

[0049] 3) Classification

[0050] Add water to the alkaline leaching filter cake B in step 2) to form a 21% mass concentration of...

Embodiment 3

[0052] 1) calcination

[0053] The TFe content is 53.4%, TiO 2 The content is 13.2%, SiO 2 The content is 3.45%, Al 2 O 3 A vanadium-titanium magnetite concentrate with a content of 5.08% and S content of 0.60% is added with CaO in a weight ratio of 1:0.1, and calcined at 900°C for 50 minutes to form calcined product A. The chemical reaction formula is the same as in Example 1. .

[0054] 2) Alkali leaching

[0055] The calcined product A in step 1) is placed in a 28% NaOH alkaline solution with a mass concentration of 28%, and subjected to alkaline leaching reaction at a temperature of 305°C for 2.5 hours. The reactants are filtered to obtain filtrate and alkaline leaching filter cake B, NaOH The consumption is 47.5kg / t to the ore, the filtrate is fed to the recovery treatment system, and the chemical reaction formula is the same as that in Example 1.

[0056] 3) Classification

[0057] Add water to the alkaline leaching filter cake B in step 2) to form a slurry with a mass concentra...

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Abstract

The invention discloses a method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching and classification. The method comprises the following steps that CaO is added to titaniferous iron concentrates according to the weight ratio of 1: 0.1 to 0.2, 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 at the temperature ranging from 300 DEG C to 370 DEG C, 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; the settling sand C is final iron ore concentrates with the TFe content ranging from 60% to 68%, and the overflow D is concentrated to be titanium concentrates with the TiO2 content ranging from 35% to 50%. 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 blast furnace use coefficient is increased, iron manufacture cost is reduced, 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 and classification. Background technique [0002] Vanadium-titanium magnetite is a composite ore of multiple metal elements. It is a symbiotic magnetite mainly containing iron, vanadium and titanium. The vanadium-titanium magnetite concentrate is one of the products obtained from the vanadium-titanium magnetite ore beneficiation, in which vanadium occurs in the titanomagnetite with isomorphism, replacing high-valent iron ions. Titanium magnetite is the main crystal mineral (Fe 3 O 4 ) And guest crystal ore [ilmenite 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 the vanadium-titanium magnetite raw ore and the vanadium-titanium magnetite concent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00
Inventor 鞠洪钢文孝廉刘炳宇赵亮陈巍王忠红刘晓明宋仁峰
Owner ANSTEEL GRP MINING CO LTD
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