Method for smelting ferrovanadium through tilting furnace

A technology of tilting furnace and ferrovanadium, which is applied in the field of metallurgy, can solve problems such as difficult control of alloy aluminum content and substandard product quality, and achieve the effect of reducing vanadium content and increasing yield

Active Publication Date: 2016-05-11
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

If the amount of aluminum is further increased, excessive aluminum will enter the alloy and cause the product quality to be substandard; the aluminum content in the alloy is not easy to control, and when customers need low-aluminum ferrovanadium, they can only meet it by sacrificing the yield of vanadium. There is an intractable contradiction between the composition and yield of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Raw materials that will meet production requirements V 2 O 5 , V 2 O 3 , Aluminum, iron, and lime are mixed and added to the tiltable electric arc furnace for smelting in 3 phases. The aluminum ratio ratio A (phase 1): B (phase 2): C (phase 3) = 1.4 :1:0.2, ratio of iron ratio X (phase 1): Y (phase 2): Z (phase 3) = 0.25: 2.25: 0.25, raw material for phase 1: vanadium (V 2 O 5 Mass content 98.0%) 1000kg, V 2 O 3 (Containing 64.1% vanadium) 3000kg, with 2446kg aluminum, 569kg iron, and 600kg lime. After mixing the materials uniformly, add them into the furnace. The secondary voltage is 190V and the arc is energized. After the furnace materials are cleared, the secondary voltage is 150V. After smelting and electrifying for 60 minutes, the residual vanadium in the quick separation slag in front of the furnace is 0.07%, and the slag is 3500kg; then the second phase raw material: V 2 O 3 (Containing 64.5% of vanadium) 3000kg, with 1260kg aluminum, 3840kg iron, 300kg lime, and ...

Embodiment 2

[0032] Raw materials that will meet production requirements V 2 O 5 , V 2 O 3 , Aluminum, iron, and lime are mixed and added to the tiltable electric arc furnace for smelting in 3 phases. The aluminum ratio ratio A (phase 1): B (phase 2): C (phase 3) = 1.4 :1:0.2, ratio of iron ratio X (phase 1): Y (phase 2): Z (phase 3) = 0.4: 2: 0.4, raw material for phase 1: vanadium (V 2 O 5 Mass content 98.0%) 1000kg, V 2 O 3 (Containing 64.1% vanadium) 3000kg, with 2446kg aluminum, 910kg iron and 600kg lime. The secondary voltage is 190V and the arc is energized. After the charge is cleared, the secondary voltage is 150V. After smelting and electrifying for 60 minutes, the residual vanadium in the quick separation slag before the furnace is 0.09%, and the slag is 3550kg; then the second phase raw material: V is added 2 O 3 (Containing 64.5% of vanadium) 3000kg, with 1260kg aluminum, 3414kg iron, 300kg lime; 150V secondary voltage. After smelting and electrifying for 80 minutes, the residu...

Embodiment 3

[0035] Raw materials that will meet production requirements V 2 O 5 , V 2 O 3 , Aluminum, iron, and lime are mixed and added to the tiltable electric arc furnace for smelting in 3 phases. The aluminum ratio ratio A (phase 1): B (phase 2): C (phase 3) = 1.4 :1:0.2, ratio of iron ratio X (phase 1): Y (phase 2): Z (phase 3) = 0.55: 1.75: 0.55, phase 1 raw material: vanadium (V 2 O 5 Mass content 98.2%) 1000kg, V 2 O 3 3000kg (containing 64.8% vanadium), with 2445kg aluminum, 1249kg iron, and 600kg lime. After mixing the materials uniformly, add them into the furnace. The secondary voltage is 190V and the arc is energized. After the furnace materials are cleared, the secondary voltage is 150V. After smelting and electrifying for 60 minutes, the residual vanadium in the slag in the front of the furnace is 0.11%, and the slag is 3700kg; then the second phase raw material: V 2 O 3 3000kg (containing 64.6% vanadium), with 852kg aluminum, 2979kg iron, 300kg lime, and 150V secondary volta...

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Abstract

The invention belongs to the field of metallurgy, and particularly relates to a method for smelting ferrovanadium through a tilting furnace. The technical aim of providing the method for smelting ferrovanadium through the large tilting furnace is achieved. The method comprises the following operation steps that raw materials including vanadium oxide, aluminum, iron and lime meeting the production requirement are added into the tilting type electric-arc furnace after being mixed evenly, and a method combining multi-phase smelting, ladder type aluminum matching and parabola type iron matching is adopted; and when the content of vanadium in slag is reduced to a certain level, most of the slag is removed, the repeated operation of staging feeding and deslagging is carried out, and the slag and iron are output at the same time during smelting of the last stage. Compared with a traditional method, by means of the method, the content of vanadium in the lean slag can be further reduced, and the smelting yield of ferrovanadium can be improved; and meanwhile aluminum consumption is equal to that of a common method combining multi-phase smelting and ladder type aluminum matching.

Description

Technical field [0001] The invention belongs to the field of metallurgy, and specifically relates to a method for smelting ferrovanadium in a tilting furnace. Background technique [0002] Vanadium plays a role in deoxidation and grain refinement in steel. A small amount of vanadium can improve the performance of steel and increase the wear resistance, toughness and strength of steel. Ferro-vanadium (ferro-vanadium alloy) has become the main alloy additive for smelting vanadium-containing steels because of its high degree of alloying, high vanadium yield, and low impurity content. [0003] At present, most domestic ferrovanadium manufacturers use the one-step electric thermite smelting process. The prepared charge is energized and arc-ignited in the electric furnace to generate metal vanadium and alumina and release heat. The alumina and the charge are added to slag The slagging agent is combined to form a low melting point and low density slag. The iron particles in the charge ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B4/06C22B5/04
CPCC22B4/06C22B5/04
Inventor 景涵孙朝晖鲜勇陈海军杜光超余彬唐红建尹丹凤王唐林
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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