Lightweight brick with mullite roll bar waste as raw material and preparation method thereof

Abstract

The invention specifically relates to a lightweight brick using mullite roller bar waste as a raw material and a preparation method thereof. The technical scheme adopted is: first mix 50~74wt% of mullite roller bar waste, 15~40wt% of clay clinker, 0.1~8wt% of α-Al2O3 micropowder, 0.1~5wt% of SiO2 micropowder, 0.1~ Mix 9wt% kyanite powder with 0-6wt% ρ-Al2O3 powder or 0-5wt% cement powder, add 10-40wt% water and 0.1-0.3wt% water reducer, mix for 3-15 minutes , modulated into a slurry, and then add 0.1-0.3wt% foaming agent to form a foam, mix evenly, cast and mold, dry at room temperature for 4-20 hours, and then dry at 100-120°C for 3-3 hours Release the mold after 10 hours, and finally fire it at 1350-1500°C, and keep it warm for 3-12 hours. The invention adopts the foam method, has simple production technology, less environmental pollution and low energy consumption; the produced product has higher strength, lower bulk density and thermal conductivity.

Description

technical field [0001] The invention belongs to the technical field of lightweight brick refractory materials, and in particular relates to a lightweight brick using mullite roller bar waste as a raw material and a preparation method thereof. Background technique [0002] With the extensive use of mullite rollers, the amount of leftovers and fracture losses after processing and cutting has also increased sharply. A large amount of mullite roller waste is no longer a problem that can be solved simply by landfilling, and with the increasing economic development and social progress, the environment has become the focus of people's attention, and the accumulation of mullite roller waste occupies land , affects the dust content of the local air, and the landfill of mullite roller waste consumes manpower and material resources, and also pollutes groundwater quality. How to turn waste into treasure and waste into resources has become a top priority for science and technology and en...

AI Technical Summary

Problems solved by technology

Among them, the burn-out additive method pollutes the environment, and it is difficult to control the production of lightweight bricks with ultra-low bulk density; the gas generation method cannot guarantee the uniformity of pores, and is unstable, resulting in poor slag resistance of the product; the porous material method has a limited scope of application and consumes less energy. High; such as the patented technology of "lightweight mullite heat-insulating brick" (CN101172840), which uses Suzhou soil, Lushan soil, and Jiaozuo mortar to prepare mullite heat-insulating bricks. The strength of the product is too low, which is not conducive to production and practical use.

The patented technology of "corundum-mullite adiabatic transfer" (CN1762906A) uses polystyrene foam balls and sawdust to prepare corundum mullite lightweight bricks. The pores are large and pollute the environment