A method for producing foamed red mud decorative tiles by using a roller kiln

Abstract

The invention discloses a method for producing foamed red mud decorative tiles by using a roller kiln, which belongs to the technical field of building ceramics production. It is characterized in that it firstly prepares green body raw materials containing 10-25% of red mud, 5-15% of polished brick waste, 15% of green tile waste, 10-40% of tile edging material, 15% of kaolin, and 15-40% of quartz. , adding water and ball milling to make red mud body pellets, and then prepare raw materials for covering layer containing 30-40% feldspar, 30-38% quartz, 15-25% glass powder, 0.1-0.3% silicon carbide, and 10% kaolin , adding water and ball milling to make covering pellets, then adding red mud body pellets and covering pellets to the mold successively, molding at 200MPa, drying and glazing, firing in a roller kiln at 1170ºC, and firing The period is 70 minutes, and the foamed red mud decorative tiles are obtained. The density and strength of the obtained tiles can be adjusted, and the water absorption rate is low. The covering layer can hide the dark color of the red mud body, and the decorative patterns and patterns of the surface glaze are clearly visible.

Description

technical field [0001] The invention discloses a method for producing foamed red mud decorative tiles by using a roller kiln, which belongs to the technical field of building ceramics production. Background technique [0002] Red mud is a by-product of alumina production in the aluminum industry. Every kilogram of alumina can produce 1-2 kg of red mud, and the country produces 10 million tons of red mud waste every year. The amount of tile waste is also very large, and the annual tile waste is as high as 10 million tons. At present, most of the waste is still disposed of in the open air, which has a negative impact on the soil, water resources and air environment. [0003] At present, the high-quality raw materials for the production of tiles are gradually decreasing, and the research on the development and utilization of red mud and tile waste to produce lightweight tiles is increasingly carried out. Patent CN102503507A announced the preparation of waste glass powder 1~10wt...

AI Technical Summary

Problems solved by technology

[0004] The problems faced in the research of using red mud and tile waste to produce lightweight tiles include: (1) The research on raw material components is not enough, especially the research on the control of gas foaming, green body softening degree and size retention during high temperature firing process Less, resulting in the production of light-weight tiles with unstable pores, water absorption and mechanical properties, which require a lot of post-processing before use; (2) The production efficiency is not high: raw materials are stored in traditional shuttle kilns or in When the heat-resistant stainless steel mold is put into the roller kiln for firing, the production cycle is too long and the process links are too many, which is not conducive to the reduction of product cost and the promotion of production technology; (3) The large amount of red mud causes the color of the tile body to be too dark , in order to realize the surface decoration pattern, a thick glaze layer is often required, which wastes expensive glaze and does not cover the deep color of the red mud layer well.