Ferro-molybdenum and preparation method thereof

A technology of ferromolybdenum and iron powder, which is applied in the field of ferromolybdenum and its preparation, can solve the problems of nitrogen oxides or fluorides, difficult temperature control, high reaction temperature, etc., and achieve low price, strong adaptability and low reaction temperature Effect

Active Publication Date: 2015-07-08
JINDUICHENG MOLYBDENUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When using this traditional formula to prepare ferromolybdenum by thermite method, there are mainly the following disadvantages: 1) the reaction temperature is high, generally above 2000°C, and the temperature in the reaction process is difficult to control; 2) the saltpetre or fluorite used in the reaction will Produce nitrogen oxides or fluorides during the preparation process, causing pollution

Method used

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  • Ferro-molybdenum and preparation method thereof
  • Ferro-molybdenum and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] The ferromolybdenum in this embodiment is made of a mixture powder and a reducing agent. The mixture powder is mixed with the following raw materials in weight percentages: molybdenum oxide powder 21.0%, iron powder 33.2%, calcium molybdate 23.5%, industrial waste residue 22.3%; the reducing agent is carbon powder, the amount of the carbon powder is 3% of the mass of the mixture powder, the mass content of molybdenum in the industrial waste residue is 15%; the mass purity of the iron powder is not low At 98%, the mass purity of the iron oxide powder is not less than 98%; the molybdenum oxide powder is molybdenum trioxide powder.

[0019] The method for preparing ferromolybdenum in this embodiment is: mix the mixture powder and the reducing agent uniformly, place it in a high-temperature furnace, keep it at a temperature of 1400°C for 10 minutes, and cool down with the furnace to obtain the product, and then perform the process on the product The slag and iron are separated...

Embodiment 2

[0022] The ferromolybdenum in this embodiment is made of a mixture powder and a reducing agent. The mixture powder is mixed with the following raw materials in weight percentages: molybdenum oxide powder 42.9%, iron oxide powder 50.3%, calcium molybdate 3.6%, industrial Waste residue 3.2%; the reducing agent is carbon powder, the amount of carbon powder used is 20% of the mass of the mixture powder, the mass content of molybdenum in the industrial waste residue is 15%; the mass purity of the iron powder is not If it is less than 98%, the mass purity of the iron oxide powder is not less than 98%; the molybdenum oxide powder is molybdenum dioxide powder.

[0023] The method for preparing ferromolybdenum in this embodiment is as follows: mix the powder mixture and the reducing agent uniformly, place it in a high-temperature furnace, keep it at a temperature of 1600°C for 60 minutes, and cool down with the furnace to obtain a product, and then perform a process on the product. The sl...

Embodiment 3

[0026] The ferromolybdenum in this embodiment is made of a mixture powder and a reducing agent. The mixture powder is mixed with the following raw materials in weight percentages: 33.3% molybdenum oxide powder, 16.7% iron oxide powder, 16.9% iron powder, molybdic acid 22.1% calcium and 11.0% industrial waste residue; the reducing agent is carbon powder, the amount of carbon powder used is 6.0% of the mass of the mixture powder, and the mass content of molybdenum in the industrial waste residue is 22.0%; the iron The mass purity of the powder is not less than 98%, and the mass purity of the iron oxide powder is not less than 98%; the molybdenum oxide powder is a mixture of molybdenum trioxide powder and molybdenum dioxide powder with a mass percentage of 9:1.

[0027] The method for preparing ferromolybdenum in this embodiment is as follows: mix the mixture powder and the reducing agent uniformly, then place it in a high-temperature furnace, keep it at a temperature of 1500°C for 3...

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Abstract

The invention discloses ferro-molybdenum made of mixture powder and reducing agents. The mixture powder comprises, by weight, 21.0%-42.9% of molybdenum oxide powder, 0%-50.3% of iron oxide powder, 0%-33.2% of iron powder, 3.6%-23.5% of calcium molybdate and 3.2%-22.3% of industrial waste residue. In addition, the invention further discloses a method for preparing the ferro-molybdenum. According to the ferro-molybdenum and the preparation method thereof, carbon powder is adopted to serve as the reducing agents, the mixture powder and the reducing agents are mixed and then roasted at the temperature of not higher than 1600 DEG C to prepare the ferro-molybdenum, and pollutants such as nitrogen oxide and fluoride do not exist in the preparation process; the adaptability of the raw material formula is strong, compared with the traditional aluminothermy adopted to prepare the ferro-molybdenum, the quality adjustment and the quantity adjustment of the raw material formula have a good raw material adaptability.

Description

Technical field [0001] The invention belongs to the technical field of ferromolybdenum preparation, and specifically relates to a ferromolybdenum and a preparation method thereof. Background technique [0002] At present, the mainstream domestic process for preparing ferromolybdenum products requires the use of the aluminothermic method, which is often referred to as the out-of-furnace method. The furnace used in the out-of-furnace method is a cylinder placed on a sand base and lined with clay bricks. Use 75% silicon-containing ferrosilicon and a small amount of aluminum particles as the reducing agent. After the charge is added to the furnace barrel at one time, it is prepared by the upper ignition method, that is, the initiator (saltpeter, aluminum scrap or magnesium scrap) is ignited on the material surface. A violent reaction occurs, then calm down, discharge slag, and remove the furnace tube. The ferromolybdenum ingot is first cooled in the sand nest, and then sent to the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C22C1/02C22C38/12C22C38/60C22C27/04C22C30/02
Inventor 王磊杨双平孙院军周新文厉学武何凯张晓崔玉青董洁王苗孙超师阿维
Owner JINDUICHENG MOLYBDENUM CO LTD
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