The future of refractory raw material will be mainly high purity, natural selection and synthesis use. Development and utilization of "three stone" raw materials, namely, andalusite, sillimanite, kyanite raw materials, can improve the microstructure and thermodynamic properties of alumina-silica refractories. As the "three stone" at high temperature phase transition to mullite, and mullite's coefficient of expansion is small, help to improve the thermal shock resistance of the material.
Addition of mullite to the material can create a large number of micropores by thermal stress diffusion, resulting in the release of stress in the refractory material, thereby improving the thermal shock resistance. The full melting temperature of Silliman is higher, which is beneficial to improve the high temperature creep. The development of high-quality synthetic refractory raw materials, the use of natural raw materials in developed countries is reduced, the amount of raw materials synthesis of high purity more and more, because of unshaped refractories and large proportion of the amount of synthetic raw materials increased, and the use of a large number of natural Production of refractory clay brick, high alumina brick and zirconite brick for raw materials is decreasing.
Innovation, research, education, management and investment will therefore be key to maintaining the vitality and success of the future refractory industry. In the current and the next few years, for China's refractory industry, is experiencing structural optimization, corporate restructuring and the adjustment of the structure of the period. China's refractory development strategy should be based on China's rich natural resources, the development of high-performance synthetic raw materials and more high-performance, functional products to meet the advanced high-temperature industrial development and requirements. At the same time, should pay attention to equipment and management, improve the quality of refractory raw materials and product stability and reliability.
The cost of producing refractories in developed countries is much higher than in developing countries because of strict environmental requirements, forcing them to produce only high value-added products or export technologies, while the dissemination of products and labor-intensive products to developing countries. As China has a unique advantage of raw materials and labor costs, there is no doubt there are more opportunities. Convenient transportation, changes in the international market, the growth of e-commerce, refractory industry to the development of a good opportunity.
Ceramic fiber board in the metallurgical industry of lightweight insulation applications
Various kilns and industrial furnaces used in the metallurgical industry require high-temperature heating because of the waste of energy and the temperature difference between the inside and outside of the furnace, and the heavy-duty conventional refractories can no longer meet the existing requirements as production requirements increase, Today we introduce the use of ceramic fiber boards and other new insulating materials in every furnace in the metallurgical industry.
1. Soking furnace
A soaking furnace is a furnace for heating an ingot in a flowering apparatus. Furnace for the pit-shaped, ingot heating temperature of 1200-1250 ℃, the furnace operating temperature of up to 1350-1400 ℃, is the cycle of thermal system furnace.
Ceramic fiber board can be used for the furnace wall cold surface permanent insulation layer soaking furnace, removable cover sealing groove (used to replace the original sand sealing groove) and the wall lining insulation heat exchange room.
2. Push-type continuous heating furnace
The steel ingots produced by the mill are heated by a soaking furnace, rolled into different shapes, and the dimensions of the alveolar blanks (slabs and billets) are rolled.