Forming method of wall-flow type honeycomb ceramic carrier

Abstract

The invention relates to a forming method of a wall flow type honeycomb ceramics carrier billet for collection of diesel engine tail gas particles. A mixture power of pure silicon carbide and methylcellulose is stirred evenly and is poured into a stirring mill and then is stirred to make the silicon carbide power and the methylcellulose mix ed evenly; a flour water solution of water and flour is stirred evenly and poured into the stirring mill with stirring and makes the pug stirred evenly enough; tung oil is added into the stirred pug, and is stirred for a plurality of minutes, when the pug can be felted together, the pug is put into a container and is sealed to guarantee that the water in the pug can not be vaporized, and is kept musty for one day; after milled and extruded to be formed, the pug is dried by a microwave oven, finally holes are filled, after the pug is parched, dried and fired, then the billet is obtained.

Description

Technical field: [0001] The invention relates to a forming method of a wall-flow honeycomb ceramic carrier for trapping diesel engine exhaust particles. Background technique: [0002] Patent application number 200610008498.1, title "Manufacturing method of nano low-temperature sintered high-purity silicon carbide honeycomb collector", the first method is to use pure silicon carbide as the porous ceramic aggregate, and use nano-silicon carbide or nano-silicon oxide as the sintering aid , the ratio of the two is controlled at 100: 1 ~ 5; methyl cellulose and tung oil are used as binders and plastic forming agents and appropriate amount of water, and the ratio of organic matter to water is controlled in the range of 1: 1 ~ 3 (weight ratio) ; The second is to configure a mixed solution of methylcellulose, tung oil and water (the three are in a weight percentage of 5:5:10) in a ratio of 25:100, and then mix the nano-sintering aid with the mixed solution. Put the micron silicon c...

AI Technical Summary

Problems solved by technology

Its shortcomings: First, the formula is not reasonable, nano-silicon carbide or nano-silicon oxide cannot be used as a sintering aid, and it cannot be fired into pure silicon carbide at high temperature, and a practical wall-flow honeycomb cannot be produced in the test Ceramic carrier; the second is the lack of trap microporous forming agent, the trap manufactured with this formula cannot form honeycomb micropores, and cannot achieve the purpose of trapping diesel exhaust particles; the third is nano-silicon carbide or nano-silicon oxide It does not have the function of a binder, and it cannot promote the viscosity of the mud during the mixing of the mud, nor can it promote the formation of pure silicon carbide at high temperature. In the test, neither good viscous mud nor manufacturing A practical wall-flow honeycomb ceramic carrier; the fourth is the lack of necessary mud forming additives, and the lack of trap micropore forming agent, it is impossible to form honeycomb micropores