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

Abstract

The invention relates to a method for batching and mud-mixing a wall-flow honeycomb ceramic carrier blank for capturing diesel engine exhaust particles. ① Mix the mixed powder of pure silicon carbide and methyl cellulose, pour the pure silicon carbide and methyl cellulose into the blender and stir, so that the silicon carbide powder and methyl cellulose powder can be mixed evenly; ② Stir the pure silicon carbide Mix the powder with methyl cellulose for a few minutes, mix the flour aqueous solution mixed with flour and water, and pour it into the mixer while stirring. After pouring all the flour aqueous solution into the mixer, stir and mix the mud fully; ③ After mixing Add tung oil to the mud. After stirring for a few minutes, when the mud is sticky and easy to stick together, mix the mud well, put the mud in a container and seal it up to ensure that the mud in the mud Moisture does not evaporate and stale time is several days.

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, titled "Manufacturing method of nano low-temperature sintered high-purity silicon carbide honeycomb trap", the method configures methyl cellulose, tung oil and water in a ratio of 25:100 (the ratio of the three is 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 ho...

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