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Preparation method of ferromolybdenum

A technology of ferro-molybdenum and iron filings, applied in the field of preparation of ferro-molybdenum, can solve the problems of waste slag calcium molybdate waste utilization, etc., and achieve the effects of solving molybdenum-containing waste, changing the structure of raw materials, and improving the reaction mechanism

Pending Publication Date: 2022-05-13
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcoming of above-mentioned prior art, a kind of preparation method of ferromolybdenum is provided, to solve the problem in the production of ferromolybdenum in the prior art and the waste utilization problem of waste slag calcium molybdate in the molybdenum oxide production process

Method used

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  • Preparation method of ferromolybdenum
  • Preparation method of ferromolybdenum
  • Preparation method of ferromolybdenum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment is formed by mixing the raw materials in the following weight percentages: 52.45% of molybdenum oxide, 5% of calcium molybdate, 3.28% of lime, 10.56% of iron filings, 10.71% of iron and phosphorus, and 18% of coke. The total material mix is ​​200g, plus 2.1g Fluorite and 4g of binder are placed in a disc pelletizer to pelletize to obtain pellets. The pellets were roasted at 1000°C for 30 minutes in a high-temperature furnace, and the compressive strength after roasting was 312.5N.

[0045] The pellets are placed in a high-temperature box furnace and kept at a temperature of 1475°C for 30 minutes, and then the product is separated from slag and iron to obtain reduced ferromolybdenum and slag.

[0046] The ferromolybdenum composition prepared in this example: Mo content is 56.56%, P content is 0.032%, S content is 0.041%, Si content is 1.35%, C content is 0.083%, Cu content is 0.22%, Sb content is 0.024% , Sn content is 0.0013%, and the balance is Fe. Th...

Embodiment 2

[0051] The present embodiment is mixed by the raw materials of following percentage by weight: molybdenum oxide 58%, calcium molybdate 4.82%, iron filings 9.10%, iron phosphorus 12.71%, coke 12.09%, total material mixes 200g, adds 2.1g fluorite and 4g The binder is placed in a disc pelletizer for pelletizing to obtain pellets. The pellets were roasted at 1000°C for 30 minutes in a high-temperature furnace, and the compressive strength after roasting was 331.8N.

[0052] The pellets are placed in a high-temperature box furnace and kept at a temperature of 1500°C for 30 minutes, and then the product is separated from slag and iron to obtain reduced ferromolybdenum and slag.

[0053] The ferromolybdenum composition prepared in this example: Mo content is 60.22%, P content is 0.037%, S content is 0.040%, Si content is 1.84%, C content is 0.075%, Cu content is 0.021%, Sb content is 0.023% , Sn content is 0.0015%, and the balance is iron.

[0054] The yield of Mo was 99.05%.

Embodiment 3

[0059] This embodiment is mixed by the following raw materials in weight percentage: 60% of molybdenum oxide, 6.5% of calcium molybdate, 10% of iron filings, 13.22% of iron and phosphorus, 7.0% of coke, and 3.28% of lime. The total material mixes 200g, plus 2.1g Fluorite and 4g of binder are placed in a disc pelletizer to pelletize to obtain pellets. The pellets were roasted at 1000°C for 30 minutes in a high-temperature furnace, and the compressive strength after roasting was 347.6N.

[0060] The pellets are placed in a high-temperature box furnace and kept at a temperature of 1525°C for 40 minutes, and then the product is separated from slag and iron to obtain reduced ferromolybdenum and slag.

[0061] The ferromolybdenum composition prepared in this example: the Mo content is 61.27%, the P content is 0.023%, the S content is 0.038%, the Si content is 1.89%, the C content is 0.079%, the Cu content is 0.23%, and the Sb content is 0.019%. , Sn content is 0.0012%. The yield o...

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Abstract

The invention discloses a preparation method of ferro-molybdenum, which is a novel method for preparing ferro-molybdenum by using molybdenum oxide, calcium molybdate and a carbonaceous reducing agent, the method is different from a traditional ferro-molybdenum smelting mode, and industrial waste residues, namely calcium molybdate and molybdenum oxide generated by washing in a molybdenum oxide production process are used as sources for producing molybdenum in the ferro-molybdenum; according to the method, iron phosphorus is adopted as a source of iron in ferromolybdenum production, low-cost coke is adopted as a reducing agent, high-temperature smelting is carried out, and qualified ferromolybdenum is smelted in a smelting reduction mode; a series of adverse problems of high raw material spreading consumption cost, overhigh reduction reaction temperature, difficulty in control of an intermediate process, environmental pollution aggravated by generated flue gas and flying, poor working conditions of a smelting site, relatively high labor cost, low resource utilization rate and the like in a traditional method are solved.

Description

technical field [0001] The invention belongs to the technical field of iron alloys, and in particular relates to a preparation method of ferromolybdenum. Background technique [0002] In the iron and steel industry, according to the statistics of molybdenum consumption in various countries in the world, the application of molybdenum in the iron and steel industry still occupies the most important position. As an alloying element of steel, molybdenum can improve the strength of steel, especially high temperature strength and toughness; improve the corrosion resistance of steel in acid-base solution and liquid metal; improve the wear resistance of steel and improve hardenability and weldability and heat resistance. Molybdenum is a good carbide-forming element that will not be oxidized during steelmaking and can be used alone or in combination with other alloying elements. Molybdenum is used together with chromium, nickel, manganese and silicon to make different types of stai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/242C22B1/02C22B34/34C22B5/10C22C1/02C22C27/04
CPCC22B1/2406C22B1/242C22B1/02C22B34/34C22B5/10C22C1/02C22C27/04
Inventor 杨双平刘守满何凯刘起航张甜甜孙海兴王苗董洁
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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