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V2O5 direct alloying steelmaking technology

A technology of alloying steelmaking and V2O5, which is applied in the field of vanadium-containing alloy steel smelting, to save investment and energy consumption, reduce the cost of vanadium alloying, and reduce environmental pollution

Inactive Publication Date: 2007-11-07
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technology of producing alloy steel containing more than 0.11% vanadium by direct alloying with vanadium slag has not been reported so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: fully use V on the electric arc furnace with charging capacity of 20 tons 2 o 5 Direct alloying and smelting high-speed tool steel M2 (W6Mo5Cr4V2), the process route adopted is: electric furnace cold charging low phosphorus (P) scrap steel, tungsten iron, molybdenum iron → melting period → oxidation period, at the end of the oxidation period, the oxidation in the furnace Thoroughly remove the slag → add V 2 o 5 Mixture with reducing agent, flux and additives→reduction period→adding and adjusting flux to adjust the composition of slag→adding slag depleting agent→out of the furnace→fine-tuning composition of ferroalloy for LF furnace→VD (vacuum degassing)→casting. Among them: adding oxide ore V with a vanadium content of 98.74% 2 o 5 , which contains 0.01% carbon, 30ppm phosphorus, and 20ppm sulfur; the added V 2 o 5 The oxide ore is 722.8Kg (30.6%, weight %); the reducing agent is 75% ferrosilicon 366kg (15.5%); the flux is CaO 878kg (37.2%), MgO 74kg...

Embodiment 2

[0025] Embodiment 2: fully use V on the electric arc furnace with charging capacity of 15 tons 2 o 5 Direct alloying and smelting high-speed tool steel M2Al (W6Mo5Cr4V2Al), the process route adopted is: electric furnace cold charging low phosphorus P scrap, tungsten iron, molybdenum iron → melting period → oxidation period, at the end of the oxidation period, the oxidation slag in the furnace is completely Remove clean → add V 2 o 5 Mixture with reducing agent, flux and additives → reduction period → adding and adjusting flux to adjust the composition of slag → adding slag depleting agent → adding aluminum ingots, out of the furnace → fine-tuning composition of ferroalloy for LF furnace → VD (vacuum degassing) → casting. Among them: adding V with a vanadium content of 98.35% 2 o 5 , which contains 0.012% carbon, 25ppm phosphorus, and 25ppm sulfur. V added to the furnace 2 o 5 Oxide ore is 544.5Kg (29.7%, weight %), add 60% silicon carbide reducing agent 326.8kg (17.9%),...

Embodiment 3

[0026] Embodiment 3: fully use V on the electric arc furnace with charging capacity of 10 tons 2 o 5 Direct alloying and smelting high-speed tool steel M2Al (W6Mo5Cr4V2Al), the process route adopted is: electric furnace cold charging of low-P scrap steel, tungsten iron, molybdenum iron → melting period → oxidation period, when the oxidation period is over, the oxidation slag in the furnace is completely removed Remove clean → add V 2 o 5 Mixture with reducing agent, flux and additives → reduction period → adding and adjusting flux to adjust slag → adding slag depleting agent → adding aluminum ingots, out of the furnace → fine-tuning composition of ferroalloy for LF furnace → vacuum degassing → casting. V used 2 o 5 The vanadium content is 98.02%, the carbon content is 0.013%, the phosphorus content is 20 ppm, and the sulfur content is 15 ppm. Join V 2 o 5 Oxide ore is 364.2Kg (30.3%, weight %), adding 75% ferrosilicon reducing agent is 91.5kg (7.6%), 60% SiC silicon car...

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PUM

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Abstract

The present invention discloses process of alloying V2O5 directly to smelting V-containing steel, and features that in the later oxidizing period during smelting steel and after the oxidation sludge is eliminated, the crushed mixture of V2O5, reductant, flux and additive is loaded, so that V2O5 is reduced with the reductant, flux and additive, and the reduced V is alloyed with molten steel directly to form V-containing steel. The present invention can reach V yield over 95 %, and has the advantages of lowered V-containing steel smelting cost, low power consumption and reduced environmental pollution.

Description

technical field [0001] The invention relates to the technical field of direct alloying and smelting of oxide ores, in particular to the use of V 2 o 5 A process for smelting vanadium-containing alloy steel by directly adding it to a steelmaking furnace. Background technique [0002] At present, the alloying of vanadium element in smelting vanadium-containing alloy steel generally adopts the method of adding ferrovanadium during charging. There are also vanadium slags (containing V 2 o 5 15% to 20%) and the mixture or pellets of the reducing agent for alloying. When alloying with ferro-vanadium, it is necessary to smelt the ferro-vanadium alloy first. Because the process of smelting ferro-vanadium alloy is complicated, most of them use electrosilicothermic method and aluminothermic method to smelt ferrovanadium. [0003] To smelt 1 ton of ferrovanadium containing 40% vanadium by electrosilicothermal method, it needs to consume 745kg containing V 2 o 5 for 98% of the i...

Claims

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Application Information

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IPC IPC(8): C22C33/04C22C38/12
Inventor 周勇李正邦张家雯杨海森
Owner CENT IRON & STEEL RES INST
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