Sintering method for high-grade vanadium titanium iron ore concentrate

A technology of vanadium ilmenite concentrate and sintering method, applied in the field of iron and steel metallurgy, can solve the problems that have not yet been reported, and achieve the effects of improving low-temperature reduction pulverization rate, uniform distribution, and improving particle size composition

Active Publication Date: 2015-02-04
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the research on the sintering strengthening technology of high-iron and low-silicon vanadium-titanium magnetite concentrate has not been reported at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0036] Under the condition of sintering raw materials including high-grade vanadium-titanium iron ore concentrate, the particle size of the coke powder after fuel pretreatment is 0-3mm, and the coke powder with a particle size of -0.5mm (particle size less than 0.5mm) is 29%, and the quicklime The first addition ratio is 75%, the second addition ratio is 25%, the water in the mixture after adding water is 7.3%, the carbon content in the mixture is 4.6%, and the height of the material layer is 660mm. The mass concentration of 1% CaCl is sprayed on the sinter 2 solution. The results show that, compared with the base period (that is, the production period without this technology), the strength of the sinter drum increases by 1.15%, the yield increases by 1.24%, the output increases by 1.06%, and the solid fuel consumption decreases by 1.31Kg / t 矿 , sinter low temperature reduction pulverization rate (RDI -3.15 ) from 56.79% to 10.23%, a drop of 82%.

example 2

[0038] Under the condition of sintering raw materials including high-grade vanadium-titanium-iron concentrate, the particle size of coke powder after fuel pretreatment is 0-3mm, and the coke powder with a particle size of -0.5mm is 26%, and the proportion of quicklime added for the first time is 60%, the second addition ratio is 40%, the water in the mixture after adding water is 7.4%, the carbon content in the mixture is 4.65%, the height of the material layer is 705mm, and the mass concentration sprayed to the sintered ore is 1.5% CaCl 2 solution. The results show that, compared with the base period (that is, the production period without this technology), the strength of the sinter drum increases by 1.67%, the yield increases by 2.03%, the output increases by 1.72%, and the solid fuel consumption decreases by 2.16Kg / t 矿 , sinter low temperature reduction pulverization rate (RDI -3.15 ) from 56.79% to 5.35%, a drop of 90.6%.

example 3

[0040] Under the condition of sintering raw materials including high-grade vanadium-titanium-iron concentrate, the particle size of the coke powder after fuel pretreatment is 0-3mm, and the coke powder with a particle size of -0.5mm is 23%, and the proportion of quicklime added for the first time is 50%, the second addition ratio is 50%, the water in the mixture after adding water is 7.5%, the carbon content in the mixture is 4.7%, the height of the material layer is 720mm, and the mass concentration sprayed to the sintered ore is 2.0% CaCl 2 solution. The results show that, compared with the base period (that is, the production period without this technology), the strength of the sinter drum increases by 2.14%, the yield increases by 2.98%, the output increases by 2.63%, and the consumption of solid fuel decreases by 2.81Kg / t 矿 , sinter low temperature reduction pulverization rate (RDI -3.15 ) from 56.79% to 3.80%, a drop of 93.3%.

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Abstract

The invention discloses a sintering method for a high-grade vanadium titanium iron ore concentrate. The method comprises the steps which are sequentially performed as follows: fuel pretreatment, burdening, water adding and mixing, pelletizing, ignition sintering, CaCl2 solution spraying and blast furnace smelting, wherein, in percentage by mass, the particle size of coke powder in the fuel after the pretreatment is 0-3 mm, 20%-29% of the coke powder is provided with the particle size smaller than 0.5 mm, quick lime is added twice, the proportion of a second addition is 25%-75%, a mixture which is formed by adding water and mixing contains 7.3%-7.6% of water, the carbon content of the mixture is 4.6%-4.75%, the material layer height during ignition sintering is 660-740 mm, and the mass concentration of the sprayed CaCl2 solution is 1%-3%. According to the sintering method for the high-grade vanadium titanium iron ore concentrate, the processing steps of optimizing sintering processing parameters, comprehensively applying fuel pretreatment, increasing water of the sintering mixture, appropriately reducing the carbon content of the sintering mixture, increasing the material layer height, separately adding fluxing agents, spraying the CaCl2 solution to a sintering ore and the like are adopted, so that the production quality and the low-temperature reduction degradation performance of the sintering ore are substantially improved, and the fuel consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and more specifically relates to a sintering method of high-grade vanadium-titanium-iron concentrate. Background technique [0002] Panzhihua vanadium-titanium magnetite concentrate (accounting for more than 60% of the iron-containing material) is a commonly used iron-containing raw material for sintering. The ore has a low total iron (TFe) content (only about 54%), TiO 2 High content (12.8%), resulting in low iron grade of sintered ore (more than 5 percentage points lower than ordinary sintered ore), poor strength, low temperature reduction pulverization rate (RDI -3.15 )high. [0003] There are certain resources of high-grade vanadium-titanium-iron concentrate (TFe is about 59%) in Panxi area. Compared with the currently used Panzhihua vanadium-titanium magnetite concentrate, this mine has high iron content, high vanadium content and low silicon content. Features, the use of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/14C21B5/00
Inventor 甘勤何木光蒋大军刘龙全贾学庆
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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