China energy saving and environmental protection refractory or grand plans

Dry process cement production technology is widely used to improve the intensity of combustion, heat transfer enhancement effect, reduce heat loss and reduce environmental pollution and other new technologies to enhance the level of cement production to a new stage. However, due to the higher temperatures, more rapid temperature change, the more intense chemical erosion and the role of the more severe mechanical stress, dry cement production apparatus need more refractory support having excellent properties. Only comprehensive supporting the application of new high-quality refractory materials, new dry-process cement kilns to work, to play its efficiency, energy saving, environmental protection superiority.

Cement kiln refractory state of technology

After the reform and opening up, China's introduction of international advanced technology and the construction of new dry process cement production line, respectively in Jidong, rather, Liuzhou, cement companies. More than 20 varieties of refractory cement production line of Class 8 need to import all. 1984, for example, each imported a kiln to spend more than 200 million U.S. dollars to buy 2,300 tons of refractories; put into operation, the annual need to spend $ 500,000 to purchase refractories. Therefore, if you can not resolve the cement kiln with new refractory localization, is bound to spend a lot of scarce foreign exchange resources. In this way, not only increase the cost of new dry process cement production, but also affect the construction of the national economy as a whole. Therefore, the "Plan" to the "Ninth Five-Year Plan" period, the state of the Science Planning supports the research and development of new dry process cement kiln refractory.

China's energy saving and environmental protection refractory or grand plans

China Building Materials Academy assumed national research through scientific research, study and solve the new dry-process cement kiln refractory series of technical problems, successfully produced directly bonded magnesia-chrome brick, periclase Mg-Al spinel brick, low chromium, chromium-free alkaline brick, anti-spalling high alumina brick, composite alkaline brick series alkali brick, series alkali castable, low cement castable refractory, calcium silicate board and a series of high-strength across the hot brick dozens of new high-quality refractory materials. Developed out of new refractory materials has been successfully used in dozens of domestic and foreign cement precalciner kiln. Subsequently, some companies take advantage of state loans to the construction of new high-quality refractory production line, forming a supporting supply capacity, basically solved the cement kiln with a new refractory materials production localization. Thus, laid the foundation for the development of China's cement kiln refractory industry, strong support for the cement industry in China entered a rapid development track.

In recent years, cement kiln refractory, there has been a new development, the domestic refractories already has a comprehensive alternative to imported refractories. On the one hand, the state has increased efforts to support scientific and technological progress of traditional industries, cement kiln environmentally friendly basic refractories, chrome-free alkaline brick-ton large-scale preparation and cement kiln with a long-life, Multifunction Series monolithic refractories included in the national "863" science and technology projects. On the other hand, some Chinese refractory enterprises bulk purchase of advanced equipment, enhance the level of refractory material, significant improvement in the quality of the refractory.

Cement kiln refractories market analysis

Since 1984, China's cement production for 20 consecutive years ranked first in the world. At present, China's cement production accounts for about 6 percent of the world's total cement production. If you reach the normal level of management, the new dry process cement kiln refractory unit consumption is about 0.30kg / t. However, due to some level of enterprise management needs to be improved, the quality of the refractory needs to be improved, with an estimated national cement rotary kiln refractory consumption per unit of approximately 0.55kg / t level. Basic refractories about 0.35kg / t, aluminosilicate refractory approximately 0.20kg / t. National cement rotary kiln clinker production to 1.2 billion tons, the annual demand of refractory 660,000 tons, of which about 40 million tons of basic refractories. So, the new refractory materials for cement kiln there is considerable room for development.