Method for smelting vanadium-rich pig iron by using high-calcium vanadium-containing steel slag

A steel slag and high-calcium technology, which is applied in the field of smelting vanadium-rich pig iron with high-calcium vanadium-containing steel slag, can solve the problems of high cost, high technical difficulty, and ineffective use of converter steel slag and vanadium, and achieve low production cost and strong operability , The effect of continuous operation production efficiency

Inactive Publication Date: 2019-11-15
吉林省金源科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the above two schemes are technically difficult and costly for beneficiation and smelting of converter vanadium-containing steel slag, and it is difficult to extract vanadium from vanadium-containing steel slag in large quantities and effectively, resulting in the vanadium in converter steel slag not being effectively utilized.

Method used

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  • Method for smelting vanadium-rich pig iron by using high-calcium vanadium-containing steel slag
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  • Method for smelting vanadium-rich pig iron by using high-calcium vanadium-containing steel slag

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Embodiment 1

[0026] The mass fractions of selected smelting raw materials are as follows

[0027]

[0028] The selected reducing agent and solvent composition mass parts are as follows

[0029]

[0030] First add 2000kg of bottom coke to the empty furnace of 1800KVA electric furnace; according to the ratio of South African vanadium-titanium magnetite and vanadium-containing steel slag as 3:7, the carbon content is 12.38% (wherein the particle size is 5mm ~ 15mm is 7.425%, The particle size is 30mm ~ 60mm (4.95%) oil shale ash residue is used as a solvent and the dosage is 31.6%. After fully stirring evenly, add it into the furnace; adjust the secondary output voltage of the electric furnace transformer (power is 1800kVA) to the lowest gear 73V; The primary current is slowly increased from 10A to 120A, and the furnace is released after 6 hours; the slag and iron after the furnace are separated to obtain slag and vanadium-containing pig iron.

[0031] The obtained high phosphorus pig ...

Embodiment 2

[0035] According to the following material batch ratio, stir well and add it into the furnace; adjust the secondary output voltage of the electric furnace transformer (power 1800kVA) to the lowest level of 73V; after electrification, the primary current is slowly increased from 10A to 120A, and it will be released after 6 hours; The final slag and iron are separated to obtain vanadium-rich pig iron.

[0036]

[0037] The obtained product composition is as follows

[0038] V Ti C S Fe Si P power consumption 1.89 0.9 3.98 0.045 0.45 1.469 11820

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Abstract

The invention discloses a method for smelting vanadium-rich pig iron by using high-calcium vanadium-containing steel slag, and belongs to the technical field of application of metallurgical slag. According to the method, the vanadium-containing steel slag and magnetite (or vanadium-containing magnetite) are used as raw materials, a proper amount of solvent is added, and submerged arc smelting is carried out in a short furnace body submerged arc furnace. The method can utilize a low-grade carbonaceous reducing agent, wherein the carbonaceous reducing agent with the particle size of less than 20mm is used as a reducing agent, the carbonaceous reducing agent with the particle size of 20mm-80mm is used for forming a residual carbon layer in an arc combustion region. According to the electric furnace capacity, timing iron discharge and slag discharge, the furnace slag and molten iron are separated, and after the molten iron is cooled to obtain the vanadium-rich pig iron. The high-calcium vanadium-containing steel slag is residual slag of vanadium -containing molten iron after smelting by a converter. According to the method, 90% of vanadium in the vanadium-containing steel slag can be enriched in the pig iron to obtain the vanadium-enriched pig iron, the steel slag is well recycled, the production process is simple, the operability is high, the production cost is low, and the methodcan be conveniently expanded in industrial production.

Description

technical field [0001] The invention belongs to the application technical field of metallurgical slag, and in particular relates to a method for smelting vanadium-rich pig iron with high-calcium vanadium-containing steel slag. Background technique [0002] To recover vanadium from vanadium-titanium magnetite, the common method is to smelt vanadium-titanium magnetite in a blast furnace to produce vanadium-containing molten iron, and then oxidize the vanadium through selective oxidation of molten iron to enter the slag, and finally obtain vanadium-containing molten iron with a higher content. Steel slag is used as raw material for vanadium extraction. The molten iron after vanadium extraction will produce a large amount of high-calcium vanadium-containing steel slag in the subsequent converter steelmaking process, which has not been rationally utilized as metallurgical solid waste, and most of it is used for cement and iron correction materials, dry-mixed mortar and road surfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B11/10C21B3/02
CPCC21B3/02C21B11/10
Inventor 胡克畏王权义张相奎张小辉王守文徐建军李吉和
Owner 吉林省金源科技有限公司
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