Preparation method of integrated wear-resistant composite ceramic coal water slurry nozzle

A composite ceramic, integral technology, applied in the direction of granular/powder fuel gasification, etc., can solve the problems of low impact corrosion resistance, short service life, poor thermal shock resistance, etc., to improve thermal shock resistance, The effect of uniform distribution and improved fracture toughness

Active Publication Date: 2014-01-15
湖北群有长物环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of an integral wear-resistant composite ceramic coal-water slurry nozzle to solve the problem of low erosion and corrosion resistance, poor thermal shock resistance, short service life, and Technical issues such as high maintenance costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: the preparation method of this monolithic wear-resistant composite ceramic coal-water slurry nozzle comprises the following steps: A. Al 2 o 3 95 parts (10 grams each, the same below), TiC6 parts, WO 3 1 part, 4 parts of sintering aid (the sintering aid consists of 0.5 parts of CaO, 2 parts of MgO, SiO 2 1 copy, La 2 o 3 0.5 parts), BeO 0.1 part, and 90 parts of absolute ethanol were sequentially loaded into a ball mill and milled for 110 hours until the diameter of the powder was 2-4um. crushed, sieved, and stored for later use;

[0018] B. Put the prepared powder into the mold of the ceramic part of the nozzle, press molding, rough process the formed ceramic part, put the processed semi-finished product into a hot-press furnace for hot-press sintering, the pressure is 30MPa, Gradually raise the temperature to the sintering temperature t=1680°C and keep it for 28 minutes, use a neutral nitrogen atmosphere for protection, and then cool with the furn...

Embodiment 2

[0020] Embodiment 2: the preparation method of this monolithic wear-resistant composite ceramic coal-water slurry nozzle comprises the following steps: A. Al 2 o 3 96 parts, TiC6.5 parts, WO 3 1.25 parts, 5 parts of sintering aid (the sintering aid consists of 0.5 parts of CaO, 2 parts of MgO, SiO 2 2 copies, La 2 o 3 0.5 parts), BeO 0.13 parts, and 95 parts of absolute ethanol were sequentially loaded into a ball mill and milled for 115 hours until the diameter of the powder was 2-4um. crushed, sieved, and stored for later use;

[0021] B. Put the prepared powder into the mold of the ceramic part of the nozzle, press molding, rough process the formed ceramic part, put the processed semi-finished product into a hot-press furnace for hot-press sintering, the pressure is 30MPa, Gradually raise the temperature to the sintering temperature t=1670°C and keep it for 29 minutes, use a neutral nitrogen atmosphere for protection, and then cool with the furnace;

[0022] C. Perf...

Embodiment 3

[0023] Embodiment 3: the preparation method of this monolithic wear-resistant composite ceramic coal-water slurry nozzle comprises the following steps: A. Al 2 o 3 97 parts, TiC7 parts, WO 3 1.5 parts, 6 parts of sintering aid (the sintering aid consists of 0.5 parts of CaO, 2 parts of MgO, SiO 2 3 copies, La 2 o 3 0.5 parts), BeO 0.15 parts, and 100 parts of absolute ethanol were sequentially loaded into a ball mill and milled for 120 hours until the diameter of the powder was 2-4um. crushed, sieved, and stored for later use;

[0024] B. Put the prepared powder into the mold of the ceramic part of the nozzle, press molding, rough process the formed ceramic part, put the processed semi-finished product into a hot-press furnace for hot-press sintering, the pressure is 30MPa, Gradually raise the temperature to the sintering temperature t=1670°C and keep it for 30 minutes, use a neutral nitrogen atmosphere for protection, and then cool with the furnace;

[0025] C. Perfor...

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PUM

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Abstract

The invention discloses an integrated wear-resistant composite ceramic coal water slurry nozzle. The integrated wear-resistant composite ceramic coal water slurry nozzle is made from following ingredients, by weight, 95 to 99 portions of Al2O3, 6 to 8 portions of TiC, 1 to 2 portions of WO3, 4 to 8 portions of a sintering aid, 0.1 to 0.2 portion of BeO, and 90 to 110 portion of absolute ethyl alcohol. A preparation method of the integrated wear-resistant composite ceramic coal water slurry nozzle comprises steps such as ball milling of raw materials, smashing and sieving, pressure forming, hot pressed sintering, and post processing. Formula of the integrated wear-resistant composite ceramic coal water slurry nozzle is reasonable; technology is advanced; erosive wear resistance of the ceramic coal water slurry nozzle is increased to more than 31 times larger than that of metal nozzles, and to more than 3 times larger than that of hard alloy nozzles; and thermal shock resistance of ceramic is improved. The integrated wear-resistant composite ceramic coal water slurry nozzle is capable of meeting with requirements of actual production preferably, service life of the integrated wear-resistant composite ceramic coal water slurry nozzle is longer than that of the metal nozzles and the hard alloy nozzles, and economic benefits of the integrated wear-resistant composite ceramic coal water slurry nozzle are higher than that of the metal nozzles and the hard alloy nozzles.

Description

technical field [0001] The invention relates to a production method of a composite ceramic coal-water slurry nozzle, in particular to a preparation method of an integral wear-resistant composite ceramic coal-water slurry nozzle. Background technique [0002] Coal water slurry is a liquid fuel that emerged in the 1970s. It is a low-pollution, high-efficiency, and pipeline-transportable oil-substituting coal-based fluid fuel that is obtained through physical processing of coal, water and some additives. It is called for liquid coal products. In the gasification process of coal water slurry, the nozzle is the key equipment. When the coal water slurry nozzle is working, it not only has to bear the high-speed impact of the hard particles in the coal powder, but also bears the thermal shock caused by the temperature change in the high temperature environment, which requires that the material of the coal water slurry nozzle must have good wear resistance and heat resistance. At ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622C10J3/50
Inventor 李军营王文寿杨晓波
Owner 湖北群有长物环保科技有限公司
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