A kind of ferromolybdenum and preparation method thereof

A technology of ferro-molybdenum and iron powder, applied in the field of ferro-molybdenum and its preparation, can solve the problems of producing nitrogen oxides or fluorides, difficult temperature control, and high reaction temperature, and achieves low price, strong adaptability and low reaction temperature. Effect

Active Publication Date: 2016-08-24
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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  • A kind of ferromolybdenum and preparation method thereof
  • A kind of ferromolybdenum and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The ferromolybdenum of the present embodiment is made by mixture powder and reducing agent, and described mixture powder is mixed by the raw material of following percentage by weight: 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, and the mass content of molybdenum in the industrial waste residue is 15%; the quality purity of the iron powder is not low 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 molybdenum ferromolybdenum in this embodiment is as follows: mix the mixture powder and the reducing agent evenly, place it in a high-temperature furnace, keep it warm for 10 minutes at a temperature of 1400 ° C, and obtain the product after cooling with the furnace, and then carry out the process on t...

Embodiment 2

[0022] The ferromolybdenum of this embodiment is made by mixture powder and reducing agent, and described mixture powder is mixed by the raw material of following percentage by weight: molybdenum oxide powder 42.9%, iron oxide powder 50.3%, calcium molybdate 3.6%, industrial Waste residue 3.2%; Described reducing agent is carbon powder, and the consumption of described carbon powder is 20% of described mixture powder quality, and the mass content of molybdenum is 15% in the described industrial waste residue; The quality purity of described iron powder is not The mass purity of the iron oxide powder is not lower than 98%; the molybdenum oxide powder is molybdenum dioxide powder.

[0023] The method for preparing molybdenum ferromolybdenum in this embodiment is as follows: mix the mixture powder and the reducing agent evenly, place it in a high-temperature furnace, keep it warm for 60 minutes at a temperature of 1600 ° C, and obtain the product after cooling with the furnace, an...

Embodiment 3

[0026] The ferromolybdenum of the present embodiment is made by mixture powder and reducing agent, and described mixture powder is mixed by the raw material of following percentage by weight: molybdenum oxide powder 33.3%, iron oxide powder 16.7%, iron powder 16.9%, molybdic acid Calcium 22.1%, industrial waste slag 11.0%; the reducing agent is carbon powder, the consumption of the carbon powder is 6.0% of the mixture powder mass, and the mass content of molybdenum in the industrial waste slag 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 formed by mixing molybdenum trioxide powder and molybdenum dioxide powder with a mass percentage of 9:1.

[0027] The method for preparing molybdenum ferromolybdenum in this embodiment is as follows: mix the mixture powder and reducing agent evenly, place it in a high-temperature furnace, keep it warm for 30 minutes at a t...

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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 in particular relates to a ferromolybdenum and a preparation method thereof. Background technique [0002] At present, the domestic mainstream production process of ferromolybdenum products needs to adopt the aluminothermic method, which is often called the outer furnace method. The furnace used in the outer furnace method is a cylinder placed on a sand base, and clay brick lining is built inside. Ferrosilicon containing 75% silicon and a small amount of aluminum particles are used 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, it is ignited with an initiator (saltpeter, aluminum chips or magnesium chips) on the surface of the material. After ignition, That is, a violent reaction occurs, and then sedation, slag discharge, and removal of the furnace cylinder. The ferromolybdenum ingo...

Claims

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Application Information

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Patent Type & Authority Patents(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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