In the glass industry, the quality of refractory materials in the melting furnace is of great significance to increase the output and quality of glass products, save fuel, extend the service life of the furnace, and reduce the cost of glass production. Poor refractory materials not only limit the operating temperature of the furnace, but also seriously damage the quality of the glass, resulting in defects such as stones, streaks, bubbles, and unnecessary coloring, which greatly affects the productivity of the furnace. The working status of each part of the melting furnace is different, and the performance of the refractory material is also different. The basic requirements for the refractory material for the glass melting furnace are roughly as follows:
(1) It must have sufficient mechanical strength to withstand mechanical loads at high temperatures;
(2) It must have a fairly high refractoriness;
(3) It must have high chemical stability and strong resistance to molten glass erosion at the use temperature;
(4) No or very little pollution to the glass liquid;
(5) Good thermal shock resistance;
(6) The volume is fixed at the operating temperature, and the reheating line shrinkage and thermal expansion rate should be small;
(7) Solid refractories should be easy to process and accurate in size, and unshaped refractories should have the same properties as the matched materials.
According to the different operating parts and industrial characteristics of the furnace, a variety of refractory materials are reasonably selected to make all parts of the furnace fully function, and the output can be increased, the quality of the glass can be improved, and the life cycle of each part of the furnace can be balanced, so as to extend the furnace The purpose of service life, reducing fuel consumption and reducing product costs. As long as you master the properties and characteristics of various refractory materials, understand the working conditions of various parts of the furnace, and study the mechanism of refractory materials being corroded, you can select refractory materials correctly and reasonably.
The refractory configuration of the flat glass melting furnace varies greatly according to the production process, scale, glass quality, furnace life, investor's economic strength, etc., such as furnaces with a service life of less than 5 years. There is a world difference between the refractory materials used in furnaces more than 10 years old. Generally, in order to improve the glass quality and reduce the defects in the glass products, when the investment funds allow, the refractory materials should be reasonably configured as much as possible when the furnace is designed, and high-quality refractory materials should be selected as much as possible.
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