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Method for preparing molybdenum-containing additive and carbon disulfide by vacuum carbothermal reduction of molybdenum concentrate

A molybdenum additive and carbon disulfide technology, applied in the direction of carbon disulfide, carbon sulfur compounds, etc., can solve the problems of large pollution, high production cost, polluted gas, etc., and achieve the effects of short process, easy operation and control, and reduced treatment and emissions

Active Publication Date: 2017-12-08
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problem to be solved is the production process of ferromolybdenum and industrial molybdenum trioxide, which produces polluting gas sulfur dioxide, high production cost, and large pollution. It provides a new way to utilize molybdenum resources and sulfur resources in molybdenum concentrates, and provides a simultaneous Method for preparing molybdenum-containing steelmaking additive and carbon disulfide

Method used

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  • Method for preparing molybdenum-containing additive and carbon disulfide by vacuum carbothermal reduction of molybdenum concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Make the particle size less than 0.15mm, MoS 2 (mass fraction) be 94% molybdenum concentrate and the active carbon powder of grain size less than 0.1mm according to the actual molybdenum disulfide content in the molybdenum concentrate and active carbon powder molar ratio 1:1.51 batching, and the powder sample total mass is 8g, fully Mix evenly to obtain evenly mixed powder raw materials.

[0027] (3) Put the homogeneously mixed powder raw material obtained in (1) into a high-temperature furnace, heat up and evacuate to a vacuum degree of 10Pa, keep it at a calcination temperature of 1300°C for 4 hours, and collect it at a condensation temperature of 25°C to liquid carbon disulfide.

[0028] (3) After the heat preservation is completed, cool down to room temperature with the furnace to obtain a molybdenum-containing steelmaking additive with a molybdenum content of 90.8% and a sulfur content of less than 0.026%.

Embodiment 2

[0030] (1) Make the particle size less than 0.15mm, MoS 2 (mass fraction) be 94% molybdenum concentrate and the active carbon powder of grain size less than 0.1mm according to the actual molybdenum disulfide content in the molybdenum concentrate and active carbon powder molar ratio 1:1.51 batching, and the powder sample total mass is 8g, fully Mix evenly to obtain evenly mixed powder raw materials.

[0031] (3) Put the homogeneously mixed powder raw material obtained in (1) into a high-temperature furnace, heat up and evacuate to a vacuum degree of 50Pa, keep it at a calcination temperature of 1600°C for 2 hours, and collect it at a condensation temperature of 25°C to liquid carbon disulfide.

[0032] (3) After the heat preservation is completed, cool down to room temperature with the furnace to obtain a molybdenum-containing steelmaking additive, the molybdenum content is 92.1%, and the sulfur content is less than 0.017%.

Embodiment 3

[0034] (1) The particle size is less than 0.05mm, the purity is the analysis pure molybdenum disulfide of 98% and the active carbon powder of particle size is less than 0.1mm according to molar ratio 1:1.5 batching, and the powder sample total mass is 5g, fully mixes evenly, obtains the mixture Uniform powder raw material.

[0035] (3) Put the homogeneously mixed powder raw material obtained in (1) into a high-temperature furnace, heat up and evacuate to a vacuum degree of 10Pa, keep it at a calcination temperature of 1500°C for 2 hours, and collect it at a condensation temperature of 25°C to liquid carbon disulfide.

[0036] (3) After the heat preservation is completed, cool down to room temperature with the furnace to obtain pure molybdenum carbide powder, the purity of molybdenum carbide is 98.7%, and the sulfur content is less than 0.012%.

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Abstract

The invention discloses a method for preparing a molybdenum-containing additive and carbon disulfide by vacuum carbon thermal reduction of a molybdenum concentrate and belongs to the field of material preparation. According to the method disclosed by the invention, as raw materials, the molybdenum concentrate and carbon powder are proportioned according to a target ratio, are fully mixed and are subsequently treated at the temperature of 1200 to 1700 DEG C and at a vacuum degree of 1 Pa to 1000 Pa by adopting a vacuum carbon thermal reduction method to prepare an molybdenum-containing steel smelting additive of which the molybdenum content is as high as 90%; besides, a volatile product carbon disulfide is prepared; and the carbon disulfide is an important chemical raw material and is collected after being condensed. The method disclosed by the invention is free of generation of polluting gas sulfur dioxide and other pollutants, can be used for preparing the molybdenum-containing steel smelting additive and can also be used for preparing the carbon disulfide which has an extremely high value.

Description

technical field [0001] The invention belongs to the field of material preparation, and discloses a method for preparing molybdenum-containing steelmaking additives and carbon disulfide by vacuum carbothermal reduction of molybdenum concentrate, and specifically relates to a method for smelting molybdenum-containing alloys prepared by using molybdenum concentrate and carbon powder as raw materials The invention relates to a molybdenum-containing steelmaking additive for steel and a method for carbon disulfide, an important chemical raw material. Background technique [0002] Compared with ordinary steel, molybdenum steel has many excellent characteristics, for example: molybdenum can improve the stability of carbides in steel, and molybdenum can form uniform carbides with carbon in steel during tempering, which can enhance the hardness of steel, resistance Abrasiveness, strength, hardenability and toughness. In addition, molybdenum can improve the thermal strength and corros...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04C21C7/00C01B32/72
CPCC21C7/00C22C33/04
Inventor 张国华孙国栋王璐王凯飞
Owner UNIV OF SCI & TECH BEIJING
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