Components of high-erosion-resistance zirconia corundum brick, melting process, and melting device

Abstract

The invention discloses components of a high-erosion-resistance zirconia corundum brick, a melting process and a melting device. The high-erosion-resistance zirconia corundum brick comprises the following components in percentage by mass: 63-68% of zirconium dioxide, 3-10% of silicon dioxide, 20-32% of aluminum oxide, 0.3-1% of sodium oxide and 0.5-1% of diboron trioxide. The melting process comprises the following procedures: retaining 1 / 3 to 2 / 3 of fused materials in a furnace body; mixing and smashing materials in all the components of the zirconia corundum brick into particles with particle sizes in a range of 2-3 mm; and then, introducing the particles into the upper end of the highest liquid level of the furnace body. The melting device comprises a smashing box and a three-phase electric arc furnace, wherein a feeding port is formed in the upper end of the smashing box, and a stirring cavity is formed in the inner upper end of the smashing box. According to the components of the high-erosion-resistance zirconia corundum brick, the melting process and the melting device, the high-erosion-resistance zirconia corundum brick is allowed to have the characteristics of compact internal structure, high compressive strength, high molten glass erosion resistance and low glass phase exudation amount, the service life of a glass kiln is prolonged, glass defects are reduced, and glass quality is improved.

Description

technical field [0001] The invention relates to the technical field of fused zirconia corundum bricks, in particular to components, a melting process and a device of a high-corrosion-resistant zirconia corundum brick. Background technique [0002] Oxy-fuel combustion technology for glass kilns can reduce fuel consumption by more than 30%, and solve the problem of nitrogen oxide emissions. Therefore, the implementation of oxy-fuel combustion technology for glass kilns is the key to energy conservation and emission reduction in the glass industry, and it is also the general trend. The high-grade glass products also put forward higher requirements for the reduction of glass defects. To meet the above requirements, the fused zirconia corundum brick, the main material of the glass furnace, needs to have higher glass erosion resistance and lower glass phase exudation, so as to increase the service life of the furnace and improve the glass quality. [0003] Zirconium dioxide conte...

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Problems solved by technology

[0004] At high temperature, the melting pool of the glass furnace has been eroded by the molten glass for a long time, causing zirconia to enter the molten glass to form stones; similarly, the fused zirconia corundum material in the upper space of the glass furnace is eroded by alkali steam and dust, and the fused zirconia The glass phase in the corundum brick is combined with the alkali component to reduce the viscosity, so it flows into the glass liquid and pollutes the glass liquid

Fused zirconia corundum bricks have been eroded by the above for a long time, the aluminum oxide is melted, the internal structure of the brick is destroyed, and the zirconium dioxide drops into the glass liquid along with the molten glass phase to form stones; silicon dioxide is the main body of the glass phase, Sodium oxide affects the viscosity of the glass phase, so if the content of silica is high, the proportion of the glass phase is high, and the content of sodium oxide is large, the viscosity of the glass phase is small, and it is easy to seep out at high temperature, which will pollute the glass solution. After increasing the content of zirconium dioxide, it is difficult to melt the large particles in the batch material, which requires a long melting time, and it is difficult to achieve a good melting effect, resulting in the phenomenon of inclusion of material blocks in the product, which affects product quality

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