A wear-resistant and corrosion-resistant silicon carbide-based ceramic nozzle and its manufacturing method

Abstract

The invention discloses a wear and corrosion resistant silicon carbide based ceramic nozzle, which is characterized by being prepared from the following raw materials by weight part: 76-88 of silicon carbide, 0.4-0.7 of agate, 3-5 of potassium feldspar, 4-6 of magnesite, 12-24 of lead oxide, 13-25 of zirconium dioxide, 4.5-6.7 of calcium carbonate, 5-8 of flyash, 1.2-2.4 of wood fiber, 6-9 of phenolic resin, 13-17 of decabromodiphenyl oxide, 10-13 of polyvinyl acetate, 0.2-0.4 of sodium pyrophosphate, 3-4 of an assistant, and a proper amount of water. The silicon carbide ceramic nozzle product obtained by the method has the advantages of compact structure, small porosity, high hardness, wear and corrosion resistance, and can be applied to color sorters to significantly improve the spraying effect.

Description

technical field [0001] The invention relates to a preparation process of a ceramic nozzle suitable for a color sorter, belongs to the technical field of nozzle molding, and in particular relates to a wear-resistant and corrosion-resistant silicon carbide-based ceramic nozzle and a manufacturing method thereof. Background technique [0002] Color sorter is a kind of non-destructive sorting equipment used for quality inspection and grading of bulk materials. It is widely used in grain, food, pigment chemical industry and other industries. The color sorter uses photoelectric detection technology to quickly and effectively distinguish and remove the heterochromatic particles in the granular material according to the difference in the optical characteristics of the material, so as to sort materials of different quality grades. The removal action is done by the ceramic nozzle, which is an indispensable key component in the color sorter system, and its performance directly affects ...

AI Technical Summary

Problems solved by technology

[0003] Since ceramic nozzles were introduced into China in the 1990s, the materials have been continuously improved and updated, gradually developing from oxide ceramics to nitride ceramics and carbide ceramics, but the production technology and preparation methods are backward, resulting in the existence of ceramic nozzles in the prior art. Many defects, such as low hardness, poor wear resistance, weak anti-corrosion and anti-erosion ability, low ductility, etc.