Method for preparing honeycomb ceramic heat accumulator by using andalusite tailings

Abstract

The invention relates to a method for preparing honeycomb ceramic by using andalusite tailings as a main raw material. The honeycomb ceramic is mainly applied in devices such as a regenerative thermal oxidizer (RTO) and the like. A method for preparing a honeycomb ceramic heat accumulator by using andalusite tailings is characterized by comprising the following steps of 1) raw material treatment:performing ball milling on the andalusite tailings, shale and high-temperature flux for 16 to 24 hours by using a ball mill respectively, and sieving the powder with a sieve of 200 to 320 meshes; 2) proportioning: mixing 60 to 80 weight percent of andalusite tailing powder, 10 to 20 weight percent of shale powder and 10 to 20 weight percent of high-temperature flux powder to obtain a mixture, adding a plasticizing agent into the mixture, and mixing for 10 to 20 minutes in a kneading machine to obtain plastic pug; 3) pug milling and ageing; 4) honeycomb blank preparation; 5) shaping and drying; and 6) sintering to obtain the honeycomb ceramic heat accumulator. The method has the characteristics of low cost and environment friendliness.

Description

technical field [0001] The invention relates to a method for preparing honeycomb ceramics with andalusite tailings as the main raw material, which is mainly used as a heat storage body in RTO regenerative incinerators and other devices, and belongs to the field of environmental protection, energy saving and new materials. Background technique [0002] Andalusite tailings are the product of andalusite concentrate separation operations. For every ton of andalusite concentrate selected, 9 to 12 tons of andalusite tailings will be produced. In the andalusite mining areas in Xinjiang, Henan and other places, a large number of andalusite tailings have been piled up, occupying valuable land resources, and producing a large amount of dust at the same time, polluting the environment. People try to effectively utilize andalusite tailings, such as the invention patent: "Method for preparing sintered bricks with andalusite, sillimanite, and feldspar ore waste as raw materials" (patent ...

AI Technical Summary

Problems solved by technology

For example, Zhu Peizhi's Chinese invention patent "mullite honeycomb ceramic carrier" (CN1111093C) first calcines bauxite, then uses bauxite clinker and kaolin as the main raw materials, and burns mullite honeycomb ceramics at 1200 ℃ ~ 1450 ℃; Kevin R.Brundage's US patent "Production of Porous Mullite Bodies" (US 6,254,822B1) uses synthetic mullite as the main raw material, and burns porous ceramics at 1400°C to 1550°C; in order to reduce the amount of synthetic materials and improve honeycomb ceramics Performance, Liu Guangwen's Chinese invention patent "andalusite honeycomb heat storage body and preparation method" (CN101857447A) directly uses andalusite concentrate as the main raw material, and burns the honeycomb ceramic heat storage body at 1350 ℃ ~ 1700 ℃; Jean-Andre Alar The US patent "Ceramic Honeycomb Structures" (US2010 / 0300053A1) also uses andalusite concentrate as the main raw material, and the honeycomb ceramics are made by firing in the temperature range of 1450 ° C to 1500 ° C. However, the production cost of using andalusite concentrate is also high. higher