Method for producing foamed red mud decoration ceramic tile by using roller hearth kiln

Abstract

The invention relates to a method for producing a foamed red mud decoration ceramic tile by using a roller hearth kiln, belonging to the technical field of building ceramic production. The method is characterized by comprising the following steps: preparing a billet raw material containing 10-25% of red mud, 5-15% of polished tile waste slag, 15% of ceramic tile green compact waste, 10-40% of ceramic tile edge grinding material, 15% of kaolin and 15-40% of quartz, adding water, carrying out ball milling, preparing a red mud billet granular material, preparing a cover layer raw material containing 30-40% of feldspar, 30-38% of quartz, 15-25% of glass powder, 0.1-0.3% of silicon carbide and 10% of kaolin, adding water, carrying out ball milling, preparing a cover granular material, sequentially adding the red mud billet granular material and cover granular material into a mold, forming under the mold pressure of 200 MPa, drying, glazing, and firing in the roller hearth kiln at 1170 DEG C for 70 minutes to obtain the foamed red mud decoration ceramic tile. The ceramic tile has the advantages of adjustable density and strength and low water absorptivity. The cover layer can cover up the dark color of the red mud billet, and the decorative pattern and design of the surface glaze are clear and 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.