Thermal insulation material for arch top of float glass kiln

Abstract

The invention discloses a thermal insulation material for an arch top of a float glass kiln. The thermal insulation material comprises silicon dioxide fine powder, silicon dioxide micro powder and fumed silica. The thermal insulation material for the arch top of the float glass kiln is prepared according to the following steps: adding the silicon dioxide fine powder, the silicon dioxide micro powder and the fumed silica into a high-speed stirrer for high-speed stirring to fully and uniformly mix all the raw materials to obtain a mixture; performing isostatic pressing preforming on the mixture to form a block body, bonding the silicon dioxide fine powder by using the fumed silica and the silicon dioxide micro powder, and crushing the block body to obtain fine-grained powder so as to facilitate construction; and in the construction process, laying the fine-grained powdery material flatly on heavy silica bricks and conducting compacting to obtain the thermal insulation material for the arch top of the float glass kiln. The thermal insulation material for the arch top of the float glass kiln prepared by the invention has the advantages of high silicon dioxide content, low thermal conductivity and low reheating linear change, can be used for a long time at the arch top of the float glass kiln, and realizes energy conservation and consumption reduction in the glass industry.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation materials, in particular to a thermal insulation material for the roof of a float glass kiln. Background technique [0002] High energy consumption is the bottleneck restricting the development of the float glass industry. Glass furnaces, especially the roof insulation of glass furnaces, can effectively save energy and reduce consumption in glass production enterprises, which has attracted widespread attention. [0003] The selection of high-performance insulation materials is the technical key to determine the insulation performance of the roof of the glass kiln. The current roof structure of the float glass kiln consists of heavy silica bricks, light silica bricks and thermal insulation fiber felt from bottom to top. The working temperature of the glass kiln pool is as high as 1580°C. After the glass kiln runs stably, the contact interface temperature between the heavy silica brick a...

AI Technical Summary

Problems solved by technology

The working temperature of the glass kiln pool is as high as 1580°C. After the glass kiln runs stably, the contact interface temperature between the heavy silica brick and the light silica brick reaches 1500-1550°C, which brings great benefits to the long-term use of the light silica brick and the energy saving and consumption reduction of the glass kiln. serious challenge

The existing lightweight silica bricks have a density of 1.0-1.2g / cm 3 , the silica content is only 90-92wt%, and the thermal conductivity at 350°C is 0.065w / (m·k). The high impurity content and high thermal conductivity make lightweight silica bricks prone to shrinkage and damage during service. Reduce the service life of the glass furnace; the temperature of the outer surface of the roof of the glass furnace is too high (above 120°C), the heat loss is large, and the effect of energy saving and consumption reduction is not significant; or the thickness of the insulation layer needs to be increased to reduce the heat loss, resulting in the The lower layer of silica bricks bears greater pressure, which is likely to cause safety hazards