High-aluminum bearing ceramic bar beam and preparation method thereof

Abstract

The invention discloses a high-aluminum bearing ceramic bar beam and a preparation method thereof. The preparation method is as follows: 64-72wt% of aluminum trioxide, 10-15%wt% of zirconia, 10-15wt% of china clay and 4-6wt% of wollastonite raw material are mixed by ball milling, then Guangdong black mud, carboxymethyl cellulose and water are added for ball milling mixing to prepare a block-shaped mud material, the block-shaped mud material is made into a blank in a stale vacuum mud refining machine, and the blank is coated with a film for nature drying, then is put in a hot air stove for not less than 15 days for drying to have a water content below 0.2%, further is put into a high-temperature shuttle kiln for heating to 600-700 DEG C, is kept warm for 8 to 10 hours, then is heated to 1400 - 1500 DEG C, and is kept warm for 4 to 5 hours for cooling to discharge. The high-aluminum bearing ceramic bar beam has high acid and alkali resistance and corrosion resistance, also has high compressive strength and flexural strength and high opening rate, is suitable for requirements of high gas velocity, reduces the use number of the bar beam, has the characteristics of stability, safety, low resistance, low consumption and uniform distribution in a strong acid medium, and can improve the acid yield by more than 12%, increase the service life by more than 3 years, and reduce the production cost by more than 30%.

Description

technical field

[0001] The invention relates to a bar beam used in an acid industrial drying absorption tower, in particular to a high-alumina load-bearing ceramic bar beam and a preparation method thereof. Background technique

[0002] In the dry absorption tower of the acid industry, it is necessary to use beams to support fillers and catalysts. Due to the very harsh working conditions of the dry absorption tower, the beams not only need to have good acid and alkali resistance, corrosion and high temperature resistance, but also under the above conditions To have high compressive and flexural strength. At present, most of the beams are slender strips of more than 1 meter and made of ordinary ceramic materials. The ceramic beams have a small opening rate, low compressive and flexural strength, and the flexural strength is generally around 150MPa, which is not up to the actual The requirement of 180 MPa is required, so in actual production, it is easy to cause local damage ...