Manufacture method of fused cast zirconia-alumina brick

Abstract

The invention discloses a manufacture method of a fused cast zirconia-alumina brick. The brick is prepared from 35.69% of zircon sand, 15.3% of zirconia, 47.01% of powdered alumina and 2% of sodium carbonate. The manufacture method comprises the following steps: 1. weighing the raw materials in weight percent and then evenly mixing; 2. adding the mixed raw materials after the furnace temperature rises to 1850 DEG C, and then heating up to melt for 90 minutes; 3. keeping the temperature for 30 minutes after the furnace temperature rises to 2780-2800 DEG C, and then carrying out secondary oxygenblowing; 4. lowering the furnace temperature to 1860-1880 DEG C for casting after the oxygen blowing, and carrying out deep gas discharge and afterteeming of a casting solution in a mouldboard; 5. and annealing. The brick has obvious high temperature resistance and erosion-resistant performance when being used on a glass kiln; compared with the original zircon corundum bricks, the service life ofthe fused cast zirconia-alumina brick is prolonged by two years, thereby bringing considerable economic benefits to users. The fused cast zirconia-alumina brick receives authorization and trust fromexperts and clients of dozens of countries, such as Japan, Britain, France, India and the like.

Description

technical field [0001] The invention relates to high-grade electric fused refractory products, in particular to a production method of high-quality fused-cast zirconium corundum bricks used in glass kilns. Background technique [0002] The zirconium corundum refractory bricks used in the most critical parts of the glass furnace need to have super high temperature resistance and corrosion resistance due to direct contact with the glass melt. If the service life is short, it will directly increase the production cost of the manufacturer. The zirconium corundum refractory bricks commonly used in this part will be severely corroded or even scrapped after being used for 5 to 6 years, which affects the normal operation of the kiln. Contents of the invention [0003] The object of the present invention is to provide a production method of a fused-cast zirconium corundum brick whose service life can be extended for at least two years and whose high-temperature resistance and corro...

AI Technical Summary

Problems solved by technology

[0002] The zirconium corundum refractory bricks used in the most critical parts of the glass furnace need to have super high temperature resistance and corrosion resistance due to direct contact with the glass melt. If the service life is short, it will