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External refining method for smelting ferrovanadium

An out-of-furnace refining and ferrovanadium technology is applied in the field of metallurgy, which can solve the problems of electric furnace body erosion, vanadium content control method and straight-tube furnace smelting process without obvious improvement, and high unit power consumption, so as to reduce furnace lining erosion and reduce unit power consumption. The effect of furnace energization time and prolongation of alloy settling time

Active Publication Date: 2016-10-12
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent CN201510002957.4 provides a method for producing ferrovanadium by electric aluminothermic method using a large tilting furnace. It adopts the technology of combining multi-stage smelting and stepped aluminum distribution, which has the characteristics of convenient operation, saving aluminum consumption and high yield of ferrovanadium. , but this method has no obvious improvement in the method of controlling the vanadium content in the slag in the final stage of ferrovanadium smelting and the straight furnace smelting process
[0006] Judging from the above disclosed technologies, no matter it is one-step method or multi-stage method, the technology for smelting ferrovanadium is relatively mature, and the vanadium yield of multi-stage method is higher than that of one-step method. The one-step ferrovanadium smelting process is not much different; at the same time, the continuous smelting electric furnace body is more severely eroded by the multi-stage method, and the unit power consumption is relatively high

Method used

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  • External refining method for smelting ferrovanadium
  • External refining method for smelting ferrovanadium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1 Preparation of ferrovanadium alloy by the technical solution of the present invention

[0052] The first-stage smelting raw materials for in-furnace smelting include V with a purity of 98.0% 2 O 5 4000kg, 2570kg of aluminum pellets with a purity of 99.7%, 2200kg of iron pellets with a purity of 99.9%, and 600kg of lime. After mixing, energize, and carry out the first-stage arc smelting operation in the furnace. When the vanadium content is 0.21%, arc slag is produced, and the amount of slag slag is 4500kg; then the second stage smelting in the furnace is carried out, and the raw materials include V with a purity of 98.0%. 2 O 5 3000kg, 1380kg of aluminum pellets with a purity of 99.7%, 2000kg of iron pellets with a purity of 99.9%, 450kg of lime, and energized after mixing, the electrode power supply is 4500kwh, and the energization time is 42min. , the amount of slag slag is 3700kg; after continuing to energize for 10min, pour the slag gold melt in the f...

Embodiment 2

[0055] Example 2 Using the technical solution of the present invention to prepare ferrovanadium alloy

[0056] The first-stage smelting raw materials for in-furnace smelting include V with a purity of 98.5%. 2 O 5 4000kg, 2550kg of aluminum pellets with a purity of 99.7%, 2200kg of iron pellets with a purity of 99.9%, and 800kg of lime. After mixing, energize, and carry out the first-stage arc smelting operation in the furnace. When the vanadium content is 0.23%, arc slag is produced, and the amount of slag slag is 4500kg; then the second stage smelting in the furnace is carried out, and the raw materials include V with a purity of 98.5%. 2 O 5 3000kg, 1350kg of aluminum particles with a purity of 99.7%, 2230kg of iron particles with a purity of 99.9%, and 600kg of lime, after mixing, energize, the electrode power supply is 3500kwh, and the energization time is 45min. When the total vanadium content in the slag is 0.34%, the slag is discharged , the amount of slag slag is...

Embodiment 3

[0059] Example 3 Using the technical solution of the present invention to prepare ferrovanadium alloy

[0060] The first-stage smelting raw materials for in-furnace smelting include V with a purity of 98.5%. 2 O 5 2000kg, all vanadium content is 64.5% V 2 O 3 2000kg, 2230kg of 99.7% aluminum particles, 2350kg of iron particles with a purity of 99.9%, 800kg of lime, energized after mixing, and the first arc smelting operation in the furnace, the electrode power supply is 4500kwh, the energization time is 90min, the total vanadium content in the slag When the slag is 0.25%, the amount of slag is 4300kg; then the second stage smelting in the furnace is carried out, and the raw materials include V with a total vanadium content of 64.5%. 2 O 3 3000kg, 1150kg of aluminum particles with a purity of 99.7%, 2250kg of iron particles with a purity of 99.9%, 600kg of lime, and energized after mixing, the electrode power supply is 4500kwh, and the energization time is 47min. , the a...

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Abstract

The invention belongs to the field of metallurgy, and specifically relates to an external refining method for smelting a ferrovanadium alloy. The invention aims at providing an external refining method for smelting ferrovanadium, with regard to problems of a high vanadium content, high power consumption, serious electric furnace body erosion and the like in slag in a last smelting period of an existing ferrovanadium smelting method adopting a multi-period method. The method comprises two-period electric furnace smelting, a primarily-molten alloy after deslagging is cast in an ingot mould filled with a refining material and subjected to a mixing reaction after the smelting is completed, and external refining is carried out. The method is capable of greatly reducing a single-furnace power-on time, reducing furnace lining erosion of an electric smelting furnace, and prolonging an alloy deposition time, thus increase for an alloy yield is benefited, and remarkable social and economic benefits are achieved.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to an out-of-furnace refining method for smelting ferrovanadium. Background technique [0002] Vanadium-containing steel is widely used in machinery manufacturing, aerospace, road and bridge construction and other industries. Due to the addition of vanadium, the comprehensive properties of steel will be significantly improved. As the most widely used vanadium microalloying master alloy in the iron and steel industry at present, the traditional smelting of vanadium ferroalloy is mainly a one-step ferrovanadium smelting process with vanadium oxide as raw material. The main technical idea is to use strong reduction such as aluminum or silicon. The vanadium and vanadium oxides are mixed in a certain proportion and then added to the smelting furnace for thermal reduction reaction. The metal vanadium produced by the reaction rapidly settles in solid solution with the molten metal iro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C35/00C22B4/06
CPCC22B4/06C22C35/005
Inventor 余彬孙朝晖程兴德陈海军唐红建景涵杜光超尹丹凤王唐林
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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