Wall-flow type honeycomb ceramic carrier batching and sludge mixing method

Abstract

The invention relates to a proposal of a wall flow type honeycomb ceramics carrier billet ingredient for collection of diesel engine tail gas particles and a mud-stirring method. The steps of the method are as follows: firstly, 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 silicon carbide power and methylcellulose mixed evenly; secondly, the mixture power of the pure silicon carbide and the methylcellulose is stirred for a plurality of minutes, then flour water solution mixed by water and flour is stirred evenly and poured into the stirring mill with stirring, pug is stirred evenly enough after all the flour water solution is poured into the stirring mill; thirdly, 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 can be kept for a plurality of days before getting musty.

Description

Technical field: [0001] The invention relates to a method for batching and mud-mixing a wall-flow honeycomb ceramic carrier for capturing diesel engine exhaust particles. Background technique: [0002] Patent application number 200610008498.1, title "Manufacturing method of nano low-temperature sintered type high-purity silicon carbide honeycomb trap", the method configures methyl cellulose, tung oil and water in a ratio of 25:100 (the three are 5:5:10 % by weight) of the mixed solution, and then the nano sintering aid is mixed with the mixed solution. Put the micron silicon carbide aggregate into the mixing agitator, slowly add the mixed liquid containing nano-sintering additives into the mixing agitator, add the mixed liquid while stirring, stir and mix for 1 hour, and then put it into the vacuum mud mixer Carry out, repeat mud training for 1 to 2 hours, and obtain mud material with good plasticity, specific gravity 1.4g / cm 3 , pH around 10. Then stale for 24 hours. It...

AI Technical Summary

Problems solved by technology

Its shortcomings: First, due to the unreasonable formula, nano-silicon carbide or nano-silicon oxide can neither be used as a sintering aid nor have the function of a binder, and it cannot promote the mixing of the mud during the mixing of the mud. Plastic forming, can not promote the forming of pure silicon carbide at high temperature, neither can obtain good plastic mud in the test, nor can it produce practical wall-flow honeycomb ceramic carrier; the second is the lack of necessary mud forming additives, and the lack of The trap microporous forming agent, so the trap manufactured with this formula cannot form honeycomb micropores, and cannot achieve the purpose of trapping diesel exhaust particles