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Molybdenum-tungsten-iron alloy and preparation method thereof

A ferroalloy, molybdenum-tungsten technology, applied in the field of molybdenum-tungsten ferroalloy and its preparation, can solve the problems of long reduction smelting time and complicated processing process, and achieve the effects of shortening smelting time, increasing economic benefits, and improving resource utilization efficiency

Inactive Publication Date: 2017-07-14
ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing molybdenum-tungsten-iron alloy to solve the technical problems in the prior art that the preparation of molybdenum-tungsten-iron alloy by using tungsten-molybdenum concentrate is complicated in the pretreatment process and the reduction and smelting time is long

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  • Molybdenum-tungsten-iron alloy and preparation method thereof
  • Molybdenum-tungsten-iron alloy and preparation method thereof
  • Molybdenum-tungsten-iron alloy and preparation method thereof

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Embodiment 1

[0045] The preparation method of molybdenum-tungsten iron alloy of the present embodiment, as figure 1 shown, including the following steps:

[0046] The raw materials calcium oxide, molybdenum and tungsten mixed coarse concentrate, ferrosilicon and iron filings are dried and ground for pretreatment, so that the moisture content is ≤5%. 2mm, the particle size of calcium oxide and ferrosilicon is -0.178mm~+0.124mm; add 20g calcium oxide, 100g molybdenum-tungsten mixed coarse concentrate, 16g ferrosilicon, 20g iron filings into the ultra-pure graphite crucible of the intermediate frequency furnace (diameter 8cm, height 16cm), heat up to 400°C at a heating rate of 100°C / min, keep warm for 4min, then continue to heat up to 1500°C at a heating rate of 200°C / min, keep warm for 1min, and then pour the melted material out, water-cooled and cooled to room temperature to realize the separation of the alloy and the slag, and the product is obtained. Among them, the Mo content in the mo...

Embodiment 2

[0049] The preparation method of molybdenum-tungsten-iron alloy in this embodiment differs from that in Embodiment 1 only in that the weight of the reducing agent ferrosilicon is 18g.

Embodiment 3

[0051] The preparation method of molybdenum-tungsten ferroalloy in this embodiment differs from that in Embodiment 1 only in that the weight of the reducing agent ferrosilicon is 18 g, and the weight of iron filings is 25 g.

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Abstract

The invention relates to molybdenum-tungsten-iron alloy and a preparation method thereof, and belongs to the technical field of mineral extractive metallurgy. The preparation method of molybdenum-tungsten-iron alloy comprises the following steps: adding the following raw materials such as calcium oxide, molybdenum and tungsten mixed crude concentrate, silicon iron and scrap iron into a crucible in sequence, rising the temperature to 400-600 DEG C, performing heat preservation for 3-5 min, continuously rising the temperature to 1500-1700 DEG C, performing heat preservation again for 1-3 min, and cooling, so as to obtain the molybdenum-tungsten-iron alloy. According to the preparation method of molybdenum-tungsten-iron alloy provided by the invention, molybdenum and tungsten mixed crude concentrate, calcium oxide, silicon iron and scrap iron are taken as the raw materials, the process is simple, and the required smelting time is as short as 1-3 min; compared with other methods, the preparation method has the advantages that the separation and purification processes of molybdenum and tungsten mixed crude concentrate are avoided, the smelting time is greatly reduced, the production cost is reduced, the resource utilization ratio is improved, and economic benefits are increased.

Description

technical field [0001] The invention relates to a molybdenum-tungsten-iron alloy and a preparation method thereof, belonging to the technical field of mineral extraction metallurgy. Background technique [0002] Tungsten and molybdenum are high-quality mineral resources in my country and are widely used in many fields, the most important of which are the steel industry and hard alloys, such as refining high-speed tool steel, alloy structural steel, spring steel, heat-resistant steel, stainless steel And a series of steel such as magnetic steel. Tungsten-molybdenum-iron alloy combines the advantages of tungsten and molybdenum. In the iron and steel industry, this alloy can refine the grain of steel, uniform the microcrystalline structure in steel, reduce the eutectic decomposition temperature of steel, and make the quenching and tempering of steel The range of fire is expanded, so that the strength, elastic limit, wear resistance and impact resistance of steel are improved. ...

Claims

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Application Information

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IPC IPC(8): C22C35/00C22C33/06
CPCC22C33/06C22C35/005C22C38/02C22C38/12
Inventor 高照国刘红召张博曹耀华范攀峰王洪亮王威柳林
Owner ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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