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Method for smelting high-speed steel by employing oxide ore

A high-speed steel and oxide technology, applied in the field of steelmaking in the metallurgical industry, can solve the problems of low alloy yield, low direct alloying rate, and no technical reports, and achieve the effect of high yield

Inactive Publication Date: 2008-05-14
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] ① The direct alloying rate is not high, the sum of the direct alloying rate of tungsten and the direct alloying rate of molybdenum is less than 5%;
[0005] ②Alloy yield is low, because molybdenum and tungsten oxide ore are easy to volatilize during the smelting process, therefore, the yield of alloy of tungsten and molybdenum is lower than 88%
[0006] In the prior art, there are only technical reports on the direct alloying and smelting of high-speed steel with one or two oxide ores, but no technical reports on the direct alloying and smelting of high-speed steel with three or more oxide ores

Method used

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Examples

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Effect test

Embodiment 1

[0026] Embodiment 1: fully use V on the electric arc furnace with charging capacity of 30 tons 2 o 5 Direct alloying smelting of high-speed tool steel W6Mo5Cr4V2 (M2), the adopted process route is as follows: when charging, first put 450kg of lime and 150kg of fluorite at the bottom of the smelting furnace, and add 25500kg of ordinary carbon and low phosphorus (p≤0.3%) scrap steel raw materials; Mix molybdenum oxide with a reducing agent, the amount of molybdenum oxide is 2850kg; the reducing agent is carbon powder, the amount is 600kg, and the mixture of molybdenum oxide and reducing agent is installed around the scrap raw material; select 4500kg tungsten ore, select carbon powder, Ferrosilicon is used as a reducing agent, and the dosage is: 300kg of carbon powder and 375kg of ferrosilicon. After mixing tungsten ore and reducing agent, put it into the high temperature action area of ​​the smelting furnace, and keep a distance of 1 meter from the furnace wall. After the charg...

Embodiment 2

[0029] Embodiment 2: fully use V on the electric arc furnace with charging capacity of 15 tons 2 o 5 Direct alloying smelting high-speed tool steel W6Mo5Cr4V2A1 (M2A1 brand), when charging, first put lime 187.5kg and fluorite 37.5kg in the bottom of the smelting furnace, add ordinary carbon and low phosphorus (p≤0.3%) scrap steel raw materials 12375kg; add molybdenum oxide The dosage is 1350kg, the reducing agents used are carbon powder and ferrosilicon, the dosages are: carbon powder is 142.5kg, ferrosilicon alone is 116.3kg, molybdenum oxide and reducing agent are mixed and installed around the scrap raw materials ; Mix tungsten ore with reducing agent, the consumption of tungsten ore is 1875kg, reducing agent is carbon powder, silicon carbide, consumption is respectively: carbon powder is 131.3kg, silicon carbide is 146.3kg. Put the mixture of tungsten ore and reducing agent into the high-temperature action area of ​​the smelting furnace, 1.1 meters away from the furnace w...

Embodiment 3

[0031] Embodiment 3: fully use V on the electric arc furnace with charging capacity of 10 tons 2 o 5 Direct alloying smelting high-speed tool steel W6Mo5Cr4V2A1 (M2A1), when charging, first put 100kg of lime in the bottom of the smelting furnace, add 8000kg of ordinary carbon and low phosphorus (p≤0.3%) scrap steel raw materials; mix molybdenum oxide with reducing agent, oxidize The amount of molybdenum is 850kg, the reducing agent is ferrosilicon, the dosage is 130kg for ferrosilicon, the mixture of molybdenum oxide and reducing agent is installed around the scrap raw material; the tungsten ore is mixed with the reducing agent, and the amount of tungsten ore is: 1000kg , the reducing agent is carbon powder and silicon carbide, and the dosage is respectively: 75kg of carbon powder and 85kg of silicon carbide. Put the mixture of tungsten ore and reducing agent into the high-temperature action area of ​​the smelting furnace, and at least 1.2 meters away from the furnace wall; s...

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Abstract

The invention discloses a method for smelting high-speed steel by employing oxide ore. During the smelting process, tungsten ore, molybdenum oxide and vanadium oxide are added at the same time to alloy smelting high-speed steel, and the alkalinity and the blowing oxygen and fluxing are controlled; the direct alloying rate can be that W(tungsten)% plus Mo(molybdenum)% plus V(vanadium)% is equal to 13%; the yield rate of alloy elements is higher than that of the method of the ferroalloy alloying high-speed steel and alloying smelting high-speed steel by less than two oxide ores. The invention can realize direct production of the alloying smelting high-speed steel by entirely adopting of the oxide ore, and has the advantages of short smelting time, fast alloy element reduction speed, high directly alloying ratio and high alloy yielding, and the smelting cost and the comprehensive energy consumption are low, leading to good economical benefit.

Description

technical field [0001] The invention relates to the field of steelmaking in the metallurgical industry. In particular, it relates to a method of directly alloying and smelting high-speed steel by using oxide ore completely and adding tungsten ore, molybdenum oxide and vanadium oxide at the same time of smelting. Background technique [0002] High-speed steel is a high-alloy steel containing a large number of alloying elements. Traditional high-speed steel production mainly uses ferroalloys for alloying. For each ton of high-speed steel smelted, 85-90kg of ferro-tungsten, 85-90kg of ferro-molybdenum and 35-40kg of ferro-vanadium are required. Generally, ferro-tungsten and ferro-molybdenum are added when charging , Add ferrovanadium at the beginning of the reduction period or half an hour before tapping. The alloying rate of iron alloy alloying to produce high-speed steel is 6% tungsten, 5% molybdenum, and 2% vanadium, and the yield of the alloy is 95% tungsten, 95% molybden...

Claims

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Application Information

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IPC IPC(8): C22C33/04C22B5/10C22B5/04C21C7/06
CPCY02P10/20
Inventor 周勇李正邦杨海森张家雯
Owner CENT IRON & STEEL RES INST
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