Method for Smelting Ferrovanadium in 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: 2017-09-08
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 material V that will meet production requirements 2 o 5 , V 2 o 3 , aluminum, iron, and lime are mixed and put into a tiltable electric arc furnace for smelting in three phases. The ratio of aluminum ratio A (phase 1) : B (phase 2) : C (phase 3) = 1.4 ︰1︰0.2, the multiple ratio of iron distribution X (Phase 1): Y (Phase 2): Z (Phase 3)=0.25︰2.25︰0.25, the raw material of Phase 1: flake vanadium (V 2 o 5 Mass content 98.0%) 1000kg, V 2 o 3(Containing vanadium 64.1%) 3000kg, with aluminum 2446kg, iron 569kg, lime 600kg. Mix the material evenly and put it into the furnace. The secondary voltage is 190V to energize and start the arc. After the furnace material is 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 output is 3500kg; after that, the second phase raw material is added: V 2 o 3 (Containing vanadium 64.5%) 3000kg, mat...

Embodiment 2

[0032] Raw material V that will meet production requirements 2 o 5 , V 2 o 3 , aluminum, iron, and lime are mixed and put into a tiltable electric arc furnace for smelting in three phases. The ratio of aluminum ratio A (phase 1) : B (phase 2) : C (phase 3) = 1.4 ︰1︰0.2, the multiple ratio of iron distribution X (phase 1): Y (phase 2): Z (phase 3)=0.4︰2︰0.4, the raw material of phase 1: flake vanadium (V 2 o 5 Mass content 98.0%) 1000kg, V 2 o 3 (Containing vanadium 64.1%) 3000kg, with aluminum 2446kg, iron 910kg, lime 600kg. 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 in front of the furnace is 0.09%, and the slag produced is 3550kg; after that, the second phase raw material is added: V 2 o 3 (containing 64.5% of vanadium) 3000kg, with 1260kg of aluminum, 3414kg of iron, 300kg of lime; the secondary ...

Embodiment 3

[0035] Raw material V that will meet production requirements 2 o 5 , V 2 o 3 , aluminum, iron, and lime are mixed and put into a tiltable electric arc furnace for smelting in three phases. The ratio of aluminum ratio A (phase 1) : B (phase 2) : C (phase 3) = 1.4 ︰1︰0.2, the multiple ratio of iron distribution X (Phase 1): Y (Phase 2): Z (Phase 3)=0.55︰1.75︰0.55, the raw material of Phase 1: flake vanadium (V 2 o 5 Mass content 98.2%) 1000kg, V 2 o 3 3000kg (containing 64.8% vanadium), with 2445kg of aluminum, 1249kg of iron and 600kg of lime. Mix the material evenly and put it into the furnace. The secondary voltage is 190V to energize and start the arc. After the furnace material is 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 0.11%, and the slag produced is 3700kg; after that, the second phase raw material is added: V 2 o 3 3000kg (containing 64...

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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 in particular relates to a method for smelting ferrovanadium in a tilting furnace. Background technique [0002] Vanadium plays the role of deoxidation and grain refinement in steel, and a small amount of vanadium can improve the performance of steel and increase the wear resistance, toughness and strength of steel. Ferrovanadium (ferrovanadium alloy) has become the main alloy additive for smelting vanadium-containing steels because of its advantages of high alloying degree, high vanadium yield and low impurity content. [0003] At present, most domestic ferrovanadium manufacturers adopt the one-step electric aluminothermic smelting process. The prepared charge is energized and arc-ignited in the electric furnace to react to produce metal vanadium and alumina and release heat. The alumina and the slagging added to the charge The slag with low melting point and low density is formed by the combinati...

Claims

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Application Information

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Patent Type & Authority Patents(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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