Rotation type dynamic continuous preparing method and device for (M1, M2)(CxN1-x) powder

A rotary dynamic and sintering device technology, which is applied in the direction of rotary drum furnace, lighting and heating equipment, furnace components, etc., can solve the problems of high cost, serious product bonding, and long time required for the product, so as to facilitate processing and production, The effect of reducing production cost and improving production efficiency

Active Publication Date: 2015-10-21
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has the following disadvantages: (1) there is inhomogeneity in the temperature field of raw materials heated during the synthesis process, so the raw materials at different positions at the same time are in different reaction stages, and it takes a long time to obtain a product composed of a single phase, and the composition of the product (2) In the gas-solid reaction stage, material stacking makes it difficult for the raw material powder in the lower layer to come into contact with the reducing atmosphere, which hinders the process of reductive carbonization and nitriding, and causes the composition of the product to and particle size are not uniform, which will seriously affect the physical and chemical properties of the product; (3) the method cannot be continuously produced and the production cycle is long, resulting in excessively high cost of industrial production

Method used

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  • Rotation type dynamic continuous preparing method and device for (M1, M2)(CxN1-x) powder
  • Rotation type dynamic continuous preparing method and device for (M1, M2)(CxN1-x) powder
  • Rotation type dynamic continuous preparing method and device for (M1, M2)(CxN1-x) powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In this embodiment, the structure of the rotary dynamic continuous sintering device is as follows figure 1 as shown, figure 2 for figure 1 The A-A sectional view of the rotary dynamic continuous sintering device is composed of a storage chamber 1, a screw feeder 2, a furnace tube 3, a furnace tube drive mechanism, a heating furnace 4, a collection chamber 5, a support frame, a threaded lifter 6 and a support frame 7; the discharge end of the screw feeder 2 is provided with an air inlet valve 19, the top of the storage chamber 1 is provided with a sealing cover 8, and the bottom of the storage chamber 1 is provided with a discharge control valve 9. The discharge port at the bottom of the material chamber 1 is connected to the screw feeder 1; the heating furnace 4 is provided with a resistance heating device 15 and a thermocouple 16; The inlet of the collection chamber 5 is provided with a feed control valve 17, the chamber wall of the collection chamber 5 is a sandwic...

Embodiment 2

[0056] In this embodiment, the structure of the rotary dynamic continuous sintering device is basically the same as that of the dynamic sintering device described in Embodiment 1, except that the length L1 of the furnace tube 3 is 3 m, and the length L2 of the heating zone of the heating furnace 4 is 2m, the number of stirring pieces 14 is 2 pieces.

[0057] (Ti,10Ta,5Nb)(C 0.9 N 0.1 ) The rotary dynamic continuous preparation method of powder is as follows:

[0058] (1) Ingredients

[0059] The raw material is TiO 2 Powder, Ta 2 o 5 Powder, Nb 2 o 5 Powder and graphite powder, the ratio of each raw material to the total mass of raw materials is as follows:

[0060]

[0061] (2) Mixing and drying

[0062] Put the raw materials measured in step (1) into a rolling ball mill, add cemented carbide balls as grinding balls, the ball-to-material ratio (mass ratio) is 4:1, add absolute ethanol and water as ball milling media, absolute ethanol The mass ratio to water is 3:1,...

Embodiment 3

[0068] In this embodiment, the structure of the rotary dynamic continuous sintering device is basically the same as that of the dynamic sintering device described in Embodiment 1, except that the length L1 of the furnace tube 3 is 4 m, and the length L2 of the heating zone of the heating furnace 4 is 3m, the number of stirring pieces 14 is 3 pieces.

[0069] (Ti,40W)(C 0.3 N 0.7 ) The rotary dynamic continuous preparation method of powder is as follows:

[0070] (1) Ingredients

[0071] The raw material is TiO 2 Powder, WO 3 Powder and activated carbon powder, the ratio of each raw material to the total mass of raw materials is as follows:

[0072] TiO 2 Powder 27.7%

[0073] WO 3 Powder 53.6%

[0074] Activated Charcoal Powder 18.7%

[0075] (2) Mixing and drying

[0076] Put the raw materials measured in step (1) into a rolling ball mill, add cemented carbide balls as grinding balls, the ball-to-material ratio (mass ratio) is 10:1, add absolute ethanol as the ball...

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Abstract

The invention provides a rotation type dynamic continuous preparing method for (M1, M2)(CxN1-x) powder. In the chemical formula (M1, M2)(CxN1-x), M1 is one of Ti, V and Cr, M2 is at least one of Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W, Mn and an lanthanide series rare earth element, the mass of M1 accounts for 60%-90% of the sum of the mass of M1 and the mass of M2, M1 and M2 are not the same element, and x is larger than or equal to 0.1 but smaller than or equal to 0.9. Technological steps include that firstly, burdening is conducted; secondly, raw materials are put into a ball grinding mill, a grinding ball and a wet grinding medium are added for conducting wet grinding, and obtained mixed slurry is dried; thirdly, a dynamic continuous sintering device is used for conducting sintering in an open system or conducting sintering in a closed system, and the (M1, M2)(CxN1-x) powder is prepared. The invention further provides a rotation type dynamic continuous sintering device used in the method. According to the method, the single-phase high-quality (M1, M2)(CxN1-x) powder can be obtained, and continuous batched production is achieved.

Description

technical field [0001] The invention belongs to the technical field of carbonitride powder preparation, in particular to (M1, M2) (C x N 1-x ) powder dynamic continuous preparation method and dynamic continuous sintering device. Background technique [0002] Carbonitride powder is mainly used to prepare cermets. The cermets prepared from carbonitride powders have good red hardness and crater wear resistance. This type of cermets has high melting point, high hardness and good wear resistance. It has strong corrosion resistance, low manufacturing cost, and broad application prospects. It is a ceramic material that is highly valued by major industrial countries in the world. The performance of this type of cermet depends largely on the properties of the carbonitride powder, including the particle size and particle size distribution, purity, carbonization completeness, free carbon content, oxygen content, etc. of the powder. Therefore, the efficient preparation of high-qualit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/56C04B35/58C04B35/626C04B35/64F27B7/14F27B7/26F27B7/34F27B7/32F27D3/08
Inventor 叶金文刘颖王杰
Owner SICHUAN UNIV
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