After more than 20 years of development, China's refractory industry is undergoing a transformation from big to strong. Based on the development and innovation of China's refractory characteristic resources, China has built a low-carbon green refractory system. With China's “One Belt, One Road” strategy to promote, a number of steel, cement companies went out to the refractory enterprises for a new market space, but also provides a new demand for products, China's refractory industry must seize this opportunity. China's refractory industry has a certain volume, and a high level of technology, but limited by the size of the domestic market, the development of bottlenecks. Therefore, the refractory enterprise must need to increase the foreign market investment, research and development, in the foreign market, spell technology, spell talent.
There are 23 colleges and universities around the world have refractory materials, of which there are 15 domestic. Domestic colleges and universities for international scientific research, training, can achieve two goals, one is to help enterprises to cultivate talents to go out, and the second is to attract some Middle East, Central Asia, Africa students to China, help China's refractory enterprises to go out. Central Asia, the Middle East refractory technology is weak, these areas should become China's foreign refractory personnel training focus area. Therefore, it is necessary to make good use of the educational resources of Chinese characteristics, and strengthen the internationalization of industry-university-research cooperation. China has resistant material raw material enterprises, production enterprises, research and development institutions, end users, forming a complete industrial chain. To go out, we need to rely on technology and talents. The key to the implementation of technology and talent is to have project support.
Low carbon emission reduction
China's refractory resources are very comprehensive, including aluminum-silicon, magnesium, graphite raw materials are abundant. To create a green low-carbon refractories technology system, we need to adhere to low-carbon emission reduction. The research on lightweight of irregular refractory aggregate is a direction, which can save resources on the one hand, and reduce carbon emission on the other. In some parts, the previous high densification, high-pressure molding, high-temperature firing method was changed to lightweight process preparation, which can achieve the same effect. Clay bricks need to be fired at 1350℃, and high alumina bricks are fired at 1480℃, which consumes high energy. In some parts, high alumina bricks can not be fired, such as steel ladle can be used without firing clay bricks.
Resource saving
We cooperate with enterprises to develop coal kaolin, through light burning, abrasive as a binding agent system, in the petrochemical industry has been applied on a large scale. Coal kaolin has very small impurities and low iron content, and can be made into cordierite, mullite, corundum mullite. Cordierite is synthesized by adding magnesium oxide at about 900℃~1000℃. In the refractory solid waste utilization, the old magnesium carbon bricks can be applied significantly, in the small ladle can be matched with 80% ~ 90% of the waste materials, and can even be used in the large ladle, of course, there are still a number of application techniques need to break through.
Environmentally friendly
RH furnace originally used magnesium-chromium materials, now the implementation of chromium-free, this technology is unique for China. In terms of bonding agent, the previous use of resin asphalt as a bonding agent. In order to reduce carbon emissions, some companies produce magnesium carbon resistant material no longer use resin binding agent. The original use of asphalt as a binding agent for gun clay, now domestic use of coal tar to do, Europe with plant sugars, to avoid the production of benzo(a)pyrene.
Efficient utilization
Refractory materials using which system is not important, the key lies in the performance. The original mineral heat furnace gun mud with bauxite grade raw materials, now with magnesium raw materials. Can be further divergent thinking, bauxite supply is tight, can be used in the petrochemical, cement industry, alumina content of 50% ~ 60% aluminum silicon system raw materials. First-class, second-class magnesium sand production is small, can be 95 magnesium sand and and 96, 97 magnesium sand mixing, not to improve the purity of magnesium sand to improve the performance of refractory materials. Solve the problem of shortage of aluminum and silicon raw materials, can not give up the magnesium raw materials alternative ideas. Previously, the need for longevity, now low-carbon green refractory must be high-performance. Alumina content of 60% of rhodochrosite and bluestone high cost, the three bauxite through the bluestone improvement, you can get used in the cement industry mullite.
Anyang Dazheng Steel Silo Co., Ltd.
