Method for vanadium aluminum alloy fine powder being used for vanadium iron spray blowing refining

A vanadium-aluminum alloy, injection refining technology, applied in the field of vanadium-iron injection refining, vanadium-aluminum alloy fine powder, can solve the problems of high energy consumption and cost, high vanadium content in smelting slag, and reduced vanadium yield in smelting, and achieve Efficient recycling, reducing vanadium content, and improving the effect of vanadium yield

Inactive Publication Date: 2019-10-25
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main problem in this process is that the newly formed metal vanadium in the slag layer after injection is usually liquid balls of several microns, and the size effect slows down the aggregation and growth process of the newly generated alloy microspheres, which ultimately leads to a decrease in the injection efficiency. After refining, the content of vanadium in smelting slag is high, and the yield of smelting vanadium decreases
Due to the accumulation of vanadium aluminum fine powder (particle size ≤ 1mm) and residual alloy together with other powdery materials (vanadium oxide, metal aluminum, etc.) Larger gaps are easily formed between vanadium-aluminum fine powder (particle size ≤ 1mm) and vanadium-aluminum residual alloy and other powdery materials (vanadium oxide, metal aluminum, etc.), resulting in a large amount of air mixed into the accumulated reactants. During the self-propagating combustion process, this part of the air is heated and expanded and discharged, resulting in more pores and gaps on the surface and inside of the obtained vanadium-aluminum alloy product, and the outside is easy to penetrate into the pores of the alloy, forming a large amount of vanadium nitride layer or oxide layer. Reduced vanadium aluminum alloy yield
In addition, the treatment method of adding vanadium-aluminum alloy fine powder into a vacuum induction furnace for remelting and refining has relatively high energy consumption and cost, and has strict requirements on equipment performance and operating conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Using 300kg V 2 o 5 (total vanadium content = 55%) and 2300kg V 2 o 3 (total vanadium content = 64%) is used as raw material for ferrovanadium smelting. Batching is carried out separately before smelting, 300kg V 2 o 5 Add 150kg aluminum powder (purity 99.7%), 50kg iron pellets (purity 96%) and 40kg lime (CaO content 92%), which is the raw material for the first part of ignition and arc striking; follow-up 2300kg V 2 o 3 A total of 1217kg of aluminum powder (purity 99.7%), 359kg of iron particles (purity 97%) and 150kg of lime (CaO content 92%) were added as the second part of raw materials. The first part of the material is put into the furnace first, ignited to strike the arc, and then the second part of the material is added later. The total smelting time of the smelting process is 95 minutes.

[0029] Using the first part of the material and the second part of the material as raw materials, a molten pool was formed in the vanadium iron furnace after a total o...

Embodiment 2

[0031] Using 300kg V 2 o 5 (total vanadium content = 55%) and 2300kg V 2 o 3 (total vanadium content = 64%) is used as raw material for ferrovanadium smelting. Batching is carried out separately before smelting, 300kg V 2 o 5 Add 150kg aluminum powder (purity 99.7%), 50kg iron pellets (purity 96%) and 40kg lime (CaO content 92%), which is the raw material for the first part of ignition and arc striking; follow-up 2300kg V 2 o 3 A total of 1217kg of aluminum powder (purity 99.7%), 359kg of iron particles (purity 97%) and 150kg of lime (CaO content 92%) were added as the second part of raw materials. The first part of the material is put into the furnace first, ignited to strike the arc, and then the second part of the material is added later. The total smelting time of the smelting process is 95 minutes.

[0032] Using the first part of the material and the second part of the material as raw materials, a molten pool was formed in the vanadium iron furnace after a total o...

Embodiment 3

[0034] Using 300kg V 2 o 5 (total vanadium content = 55%) and 2300kg V 2 o 3 (total vanadium content = 64%) is used as raw material for ferrovanadium smelting. Batching is carried out separately before smelting, 300kg V 2 o 5 Add 150kg aluminum powder (purity 99.7%), 50kg iron pellets (purity 96%) and 40kg lime (CaO content 92%), which is the material for the first part of ignition and arc striking; follow-up 2300kg V 2 o 3 A total of 1217kg of aluminum powder (purity 99.7%), 359kg of iron particles (purity 97%) and 150kg of lime (CaO content 92%) are added, which is the second part of the material. The first part of the material is put into the furnace first, ignited to strike the arc, and then the second part of the material is added later. The total smelting time of the smelting process is 95 minutes.

[0035] Using the first part of the material and the second part of the material as raw materials, a molten pool is formed in the vanadium iron furnace after a total o...

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Abstract

The invention relates to the field of vanadium alloy smelting methods, in particular to a method for vanadium aluminum alloy fine powder being used for vanadium iron spray blowing refining which improves the vanadium iron spray blowing refining efficiency to reduce the vanadium content in slag and improve the vanadium iron smelting vanadium yield. The method comprises the following steps that a, the vanadium aluminum alloy fine powder and aluminium powder are weighed and mixed evenly according to the proportion of the mass ratio of the vanadium aluminum alloy fine powder and the aluminium powder being 0.4-0.6 to fabricate spray blowing material powder, and the mixed spray blowing material powder is firstly added into a spray blowing material tank for later use before the spray blowing refining; b, batching is performed according to the method for preparing vanadium iron alloy by an electro-aluminothermic process, and front segment material adding and powered smelting are performed; c,an inert gas is used as a spray blowing carrier gas, and powered refining is performed after completion; and d, furnace body standing cooling and alloy cake water quenching and crushing are performed,and finally, the vanadium iron alloy is obtained. By means of the method for the vanadium aluminum alloy fine powder being used for the vanadium iron spray blowing refining, the vanadium iron spray blowing refining efficiency can be improved, the vanadium content in the slag is reduced, the vanadium iron smelting vanadium yield is improved, the purpose of efficiently recycling the vanadium aluminum alloy fine powder from vanadium aluminium workshops is achieved, and the method for the vanadium aluminum alloy fine powder being used for the vanadium iron spray blowing refining is especially suitable for vanadium alloy preparation.

Description

technical field [0001] The invention relates to the field of vanadium alloy smelting methods, in particular to a method for vanadium-aluminum alloy fine powder to be used for jet refining of vanadium iron. Background technique [0002] As a common alloying element additive in steel, ferrovanadium can effectively improve the toughness, strength and wear resistance of steel products. Its mechanism of action is: vanadium can react with carbon and nitrogen in steel to form small and hard Molten metal carbides and nitrides, these compounds can act as refiners and precipitation strengthening agents, refine the structure and grains of steel, increase the coarsening temperature of grains, thereby reducing overheating sensitivity and improving the overall performance of steel . In the smelting process of ferrovanadium smelting by electric thermite method in straight furnace, injection refining technology is used to promote the reduction of residual vanadium oxides in the slag. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C35/00C22C27/02C22C1/02C22C1/06
CPCC22C1/02C22C1/06C22C27/025C22C35/00
Inventor 叶明峰师启华景涵余彬
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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