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Silicon nitride powder production line

A silicon nitride powder and production line technology, applied in nitrogen compounds, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of difficult production management, many equipment, large investment, etc., and achieve long warm-up time, reasonable connection relationship, smooth metal surface

Active Publication Date: 2018-10-02
ZHEJIANG YUYAO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] 4. Difficult production management: many equipment, large workshop, many links, many processes, large investment
[0016] 5. Many supporting facilities: auxiliary facilities such as dust absorption, anti-static, vibration isolation, and noise reduction

Method used

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  • Silicon nitride powder production line
  • Silicon nitride powder production line
  • Silicon nitride powder production line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Such as figure 1 As shown, a silicon nitride powder production line includes a feeding unit, a reaction unit, a receiving unit and a circulating water cooling unit.

[0091] The feeding unit includes a silicon powder feeding mechanism, a nitrogen preparation pressurization device 300 , a microwave plasma preheater 301 and a liquid ammonia storage tank 314 . The silicon powder feeding mechanism and the nitrogen gas preparation booster are respectively connected with the microwave plasma preheater to provide silicon powder and nitrogen respectively, and the nitrogen gas preparation booster is also connected with the silicon powder feeding mechanism to deliver nitrogen to provide pressure.

[0092] The reaction unit includes a suspension reactor 302 and an insulated cooler 303 connected in sequence; the microwave plasma preheater communicates with the suspension reactor to provide silicon powder and nitrogen; the nitrogen preparation pressurization device communicates with...

Embodiment 2

[0104] The difference between this embodiment and Embodiment 1 is that: the vertical angle of the air inlet slit is 30 degrees. And the air inlet slots are respectively provided with 1 layer and 5 layers in the heating area and the reaction area.

Embodiment 3

[0106] The difference between this embodiment and Embodiment 1 is that: the vertical angle of the air inlet slit is 50 degrees. And the air inlet slots are respectively provided with 1 layer and 3 layers in the heating zone and the reaction zone.

[0107] Production line production of the present invention compares with main index in the industry

[0108] index

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PUM

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Abstract

Relating to the silicon nitride preparation field, the invention discloses a silicon nitride powder production line, which comprises a feeding unit, a reaction unit, a material recovering unit and a circulating water cooling unit. The feeding unit comprises a silicon powder feeding mechanism, a nitrogen preparation supercharging device and a microwave plasma preheater. The reaction unit comprisesa suspension reactor and a thermal insulation cooler. The material recovering unit comprises a gas powder separator, a packer and a recovered nitrogen storage tank. The circulating water cooling unitcomprises a water cooling pool and a water cooling pump. The silicon nitride powder prepared by the production line provided by the invention has the advantages of high purity, small particle size, high alpha phase content, high yield and fast production.

Description

technical field [0001] The invention relates to the field of silicon nitride preparation, in particular to a silicon nitride powder production line. Background technique [0002] Silicon nitride is an important structural ceramic material. It is a superhard substance, inherently lubricious, and wear-resistant, and is an atomic crystal; it resists oxidation at high temperatures. Moreover, it can also resist cold and heat shocks, and it will not shatter when heated to above 1000°C in the air, cooled rapidly and heated again sharply. It is precisely because silicon nitride ceramics have such excellent characteristics that people often use it to manufacture mechanical components such as bearings, gas turbine blades, mechanical seal rings, and permanent molds. [0003] At present, domestic silicon nitride powder production mainly consists of the following two methods: [0004] 1. Bell furnace electric or microwave heating nitrogen infiltration method [0005] Steps: silicon p...

Claims

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Application Information

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IPC IPC(8): C01B21/068
CPCC01B21/0682
Inventor 任小平
Owner ZHEJIANG YUYAO NEW MATERIAL CO LTD