The future development of fire-resistant plastics should be in these 5 directions

      Since the late 1980s, there has been a tremendous development of functional indefinite refractories. From refractory castables to refractory plastics, these indefinite refractories slowly began to replace the use of traditional refractory materials; and provided new ideas for the design of furnaces.

      Corundum-based coroplast for cupola cylinder was prepared by using brown corundum aggregate, electrofused dense corundum fine powder, silicon carbide and reactive α-Al2O3 as raw materials, adding a certain amount of scaled graphite and Si powder, and phenolic resin as binding agent. A wear-resistant plasticizable pounding material was developed and prepared by using electrofused corundum as aggregate, corundum powder, SiC powder, Guangxi white clay, SiO2 micronized powder and expansion agent as matrix, plus 0.15% corrosion inhibitor and 1.5% high alumina cement as hardener. Another part of the researchers, based on the study of the effect of heat treatment temperature on the performance of coke gemstone based plastic, developed and prepared a coke gemstone based plastic with slightly lower performance than bauxite based plastic, and used it in the roof and flue part of the low temperature section of a domestic steel plant's heating furnace.

      There will be five main directions for the future development of refractory plastic.

      1. China's refractory plastic in the construction of relatively backward technology, pounding construction is the current mainstream construction method. In foreign countries, especially our near neighbor Japan, spraying technology is widely used in the construction of plastic; this new technology has the advantages of high efficiency, time saving, labor saving, good uniformity, strong integrity and improved operating environment. Overseas, the spraying technology of plastic is used in a large number of heating furnaces; while China's research started late, the lack of supporting materials and equipment, spraying construction of late plastic elasticity, poor bonding, easy to peel off and other problems. In the future, research to improve the initial bonding strength of refractory plastic, the use of spray construction has a pivotal role.

      2. Spraying robots have begun to be used in the operation of Japanese industrial furnaces, and future construction automation and integration is the trend of construction technology improvement; the construction environment and construction process of refractory materials will undergo important changes, which also leads to significant changes in the performance of refractory materials. Especially with today's emphasis on environmental protection, refractories need to adapt to the changes of the times, from production to construction.

      3. Increasing the variety of indefinite refractory materials and improving the shortcomings of traditional materials to promote the technological development of industrial production fields such as steelmaking and ironmaking, petroleum and chemical industry from the aspect of equipment materials.

      4. The new composite bonding agent will replace the traditional indefinite refractory bonding agent. The composite bonding agent can not only improve the performance of the plastic in high temperature work, but also improve the construction performance of the plastic, to meet the needs of construction and improve efficiency. Research multi-species composite bonding agent can greatly open up new markets for refractory plastics, not only limited to the traditional manufacturing of industrial furnaces, but also can be used in new markets such as fire design of buildings.

      5. Compared with other kinds of unshaped refractory materials, the unshaped refractory plastic has a series of unique excellent properties: thermal shock resistance, spalling resistance and corrosion resistance. At present, in the field of aviation and aerospace, refractory refractories have started to be involved in the research and production of thermal protection materials for the thermal protection of aircraft and ground facilities. Traditional organic refractory materials have a low melting point and poor chemical resistance, but refractory plastics can play a role in the aviation and aerospace industry.

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