Low-porosity periclase-magnesium aluminate spinel-zirconia sintered composite refractory material and production process thereof

Abstract

The invention provides a low-porosity periclase-magnesium aluminate spinel-zirconia sintered composite refractory material, which is prepared from the following materials: 35-48% of 5-1mm magnesia, 15-30% of 1-0.088mm magnesia or synthetic magnesium aluminate spinel, 10-30% of less than 0.088mm synthetic magnesium aluminate spinel, 0-12% of less than 0.020mm synthetic magnesium aluminate spinel, 0-10% of G alumina micro powder, 0-4% of magnesium oxide micro-powder, 1-10% of zirconium oxide micro-powder, 0.05-0.2% of external third generation water reducing agent and 3-7% of external sulfite lye. During production, the magnesia is taken as an aggregate, and the composite magnesium aluminate spinel-zirconium oxide is taken as a base material; in the base material, the synthetic magnesium aluminate spinel is taken as coarse particles, while in-situ spinel-zirconium oxide is taken as fine particles; a brick-making material is dispersed in an efficient dispersant and then formed into compact green bricks under high pressure; then the compact green bricks are sintered at high temperature to form the refractory material with a compact structure; according to the proportions of the raw materials, all the raw materials are weighed, blended, mixed, molded and dried, and then sintered in the temperature range from 1650 to 1800 DEG C for 5-10 hours, and finally, the refractory materials is obtained. The refractory material has extremely low apparent porosity, and excellent high-temperature resistance, thermal shock resistance and erosion resistance; therefore, the refractory material is applicable for the grid of the heat accumulating chamber of a glass kiln as an erosion-resistant refractory material.

Description

technical field [0001] The invention is a low-porosity periclase-magnesia-alumina-spinel-zirconia sintered composite refractory material, which is suitable for the moderately eroded parts in the regenerator chamber of a glass kiln, and is suitable for high-resistance refractory lattices such as the regenerator chamber of a glass kiln. Erosion refractories. Background technique [0002] At present, the glass kiln regenerator mainly uses magnesia bricks with a MgO content of 97%, magnesia bricks with a MgO content of 95% and directly bonded magnesia-chrome bricks as lattice bodies. Due to high temperature, alkaline and oxidizing atmosphere, chromium-containing refractories will produce toxic hexavalent chromium, and magnesia-chrome bricks will be gradually eliminated. Since the glass kiln uses a large amount of alternative fuels such as petroleum coke, a large amount of SO contained in the kiln gas 2 Such acidic substances will severely corrode the strongly alkaline magnesia...

AI Technical Summary

Problems solved by technology

If all regenerators use spinel refractory materials, it will significantly increase the purchase cost of refractory materials, making it difficult for glass manufacturers to accept

Images