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Out-of-furnace smelting method of ferrovanadium alloy

A technology of vanadium ferroalloy and smelting method, which is applied in the field of metallurgy, can solve the problems of long process cycle, unstable quality, and low vanadium recovery rate of smelting vanadium ferroalloy, achieve good economic benefits and application prospects, stable product quality, and low aluminum consumption Effect

Inactive Publication Date: 2021-07-23
BEIHAI SPECIAL IRON ALLOY PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the existing process of smelting vanadium ferroalloy has long cycle, high energy consumption, low vanadium recovery rate and unstable quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] a. Furnace body preparation: Fill the furnace body with 650kg of magnesia and 2600kg of corundum slag. After vibration, fix it with a cold-rolled iron sheet of about 1mm to form a knotted layer in the furnace tube. The thickness of the knotted layer is 80mm. The diameter of layer is 2100mm; Then evenly pave 25mm at the bottom of the furnace, the thick particle diameter is 8mm, and vanadium content is 79.5% vanadium-iron alloy fine powder;

[0043] b. Mixing and smelting: mix 400kg of vanadium trioxide, 3600kg of vanadium pentoxide, 1852kg of aluminum pellets, 380kg of iron filings, 150kg of lime and 700kg of return materials, and put them into the smelting furnace; , the particle size of the fine alloy powder is 10mm; the particle size of the slag is 12mm; then 15kg of aluminum powder and 0.5kg of potassium chlorate are evenly mixed and spread on the surface of the smelting charge, and wood chips are placed in the center of the smelting charge; when the smelting starts, ...

Embodiment 2

[0048] a. Furnace body preparation: Fill the furnace body with 600kg of magnesia and 2700kg of corundum slag. After vibration, fix it with a cold-rolled iron sheet of about 1mm to form a knotted layer in the furnace tube. The thickness of the knotted layer is 80mm. The diameter of layer is 2100mm; Spread 20mm evenly at the furnace bottom then, thick grain diameter is 8mm, vanadium-containing amount is the vanadium-iron alloy fine powder of 75.2%;

[0049] b. Mixing and smelting: After mixing evenly the smelting furnace charge consisting of 400kg of vanadium trioxide, 3600kg of vanadium pentoxide, 1812kg of aluminum particles, 380kg of iron filings, 200kg of lime and 800kg of return materials, put them into the smelting furnace; In the material, the particle size of the fine alloy powder is 10mm; the particle size of the slag is 12mm; then 15kg of aluminum powder and 0.5kg of potassium chlorate are evenly mixed and spread on the surface of the smelting charge, and wood chips are...

Embodiment 3

[0054] a. Furnace body preparation: Fill the furnace body with 650kg of magnesia and 2600kg of corundum slag. After vibration, fix it with a cold-rolled iron sheet of about 1mm to form a knotted layer in the furnace tube. The thickness of the knotted layer is 81mm. The diameter of layer is 2100mm; Then evenly pave 18mm at the bottom of the furnace, the thick particle diameter is 8mm, and vanadium content is 67.7% vanadium-iron alloy fine powder;

[0055] b. Mixing and smelting: Mix the smelting furnace charge consisting of 1,000kg of vanadium trioxide, 3,000kg of vanadium pentoxide, 1,952kg of aluminum pellets, 410kg of iron filings, 200kg of lime and 600kg of return materials, and put them into the smelting furnace; In the material, the particle size of the fine alloy powder is 10mm; the particle size of the slag is 12mm; then 15kg of aluminum powder and 0.5kg of potassium chlorate are evenly mixed and spread on the surface of the smelting charge, and wood chips are placed in ...

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Abstract

The invention relates to the technical field of metallurgy, in particular to an out-of-furnace smelting method of ferrovanadium alloy. In order to solve the technical problems of long process period, high energy consumption, low vanadium recovery rate and unstable quality of ferrovanadium alloy smelting at the present stage, the invention provides the out-of-furnace smelting method of the ferrovanadium alloy. The out-of-furnace smelting method specifically comprises the following steps of a, treating a furnace barrel by adopting a dry-method furnace barrel knotting process; b, uniformly mixing smelting furnace charge, putting into a smelting furnace, and starting smelting; c, blowing and refining, specifically, after the reaction is finished, electrically heating and then blowing and refining, and electrically heating again after the blowing and refining is finished; and d, after electric heating is finished again, and standing and water quenching to obtain a FeV80 alloy product. The obtained ferrovanadium alloy product meets the national standard GB / T 4139-2012, and the vanadium recovery rate is kept to be 98% or above; and meanwhile, the method also has the characteristics of low aluminum consumption, low energy consumption, simple process flow and stable product quality, and has good economic benefits and application prospects.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to an out-of-furnace smelting method of vanadium-iron alloy. Background technique [0002] More than 80% of global vanadium production is used in the steel industry, and most of them are added to steel in the form of ferro-vanadium alloy. Vanadium can react with carbon and nitrogen in steel to form small and hard refractory metal carbides and nitrides. These compounds can act as refiners and precipitation strengthening agents to refine the structure and grain of steel. Increase the grain coarsening temperature, thereby reducing overheating sensitivity and improving the toughness, strength and wear resistance of steel products. [0003] At present, the main method for smelting ferrovanadium alloys in China is the electric thermite method. The prepared raw materials are put into the electric arc furnace to energize the arc to cause a redox reaction, and a certain amount of slaggin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/06C22C35/00C22B5/04C22C27/02
CPCC22C33/06C22C35/00C22C27/025C22B5/04
Inventor 易炳华张磊
Owner BEIHAI SPECIAL IRON ALLOY PANGANG GROUP
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