China's outlook for glass kiln resistant materials

At present, the refractory industry for the glass industry exists in many small-scale enterprises, the power of small scattered, low-level heavy construction, each fighting

In recent years, China's refractories for the glass industry has made great progress, the comprehensive embodiment of broken in the large-scale float glass kiln kiln age, from 3 to 4 years to 5 to 8 years, and all the materials to achieve localisation, greatly narrowing the gap with the advanced level of foreign countries for the refractories for the glass industry in the future, laying the foundation for the development of refractories. However, compared with the needs of further development of the glass industry and foreign advanced level, there are still many problems to be solved. After China's accession to the WTO, foreign high-quality and inexpensive products can be driven into, at the same time, China's high-quality products into the international market has become more convenient. Seize the opportunity to seriously analyse China's refractories for the glass industry problems and gaps with the world's advanced level, take the right countermeasures, as soon as possible to narrow the gap with the developed countries, to catch up with the world's advanced level, which will be our response to the challenge of accession to the WTO the best response. The following will be based on the main problems that exist at present, combined with the thinking of future development, put forward some solutions. First, bigger and stronger with strong technological innovation strength and international competitiveness of science, industry and trade integration of large-scale supporting refractories leading enterprises, so that it becomes the overall level of the industry to enhance the overall level of the industry, driving the development of the industry as a whole, the leading force.

At present, the refractory industry for the glass industry exists in many small-scale enterprises, the power of small scattered, low-level heavy construction, each fighting, market disorder and other phenomena, resulting in the overall level of the industry to improve slowly. To casting refractories, for example, in recent years, China has built a casting refractories more than 30 enterprises, these enterprises in recent years, although most of the progress to varying degrees, but the majority of small-scale production, weak technical force, backward technology and equipment, product quality is difficult to ensure. Sintered refractories have a similar situation. Thus forming a high-grade products on the one hand still need to import the situation. And because of these enterprises dumping at low prices. Caused by the market backbone enterprises to enhance the product grade obstacles. Therefore, there is an urgent need to have the strength of science, industry and trade integration of refractories company, to ensure that the provision of reliable quality and high quality supporting refractories. This company can use their own strong strength to integrate resources, bigger and stronger, to guide the industry to continuously improve the overall level, climb new peaks. The so-called bigger is that the company should have its own controllable certain scale of casting refractories, alkaline refractories, silica bricks, zirconium, zirconium corundum, silica, mullite refractories and new type of non-shaped refractories production base and supporting system, can provide the whole kiln with high quality supporting refractory materials to meet the entire glass industry, including the glass fibre industry on the refractory material needs. The so-called strong, is to rely on the new strong, make full use of the strong technical advantages, and constantly carry out technological innovation, enhance the overall level of the industry, so as to become a large-scale refractory materials supporting companies with international competitiveness.

Second, the design of glass kiln, refractory production, kiln operation, maintenance, use and refractory production and use of scientific research between the four close integration. Is to extend the kiln kiln age, as soon as possible to reach the international advanced level of this one of the important reasons. To extend the kiln kiln age must have two conditions: First, there are science, industry and trade integration of supporting refractories company, can provide a variety of high-quality supporting refractory materials required for the kiln; second is to design, production, use and research in close conjunction with each other to play their respective strengths, so that the configuration of glass kiln refractory more reasonable, especially the kiln age of more than 8 years of age kiln, has not been completely rely on the improvement of refractory material quality can be achieved. It can't be achieved by improving the quality of refractory material. Superior design, careful operation, maintenance management and quality refractory matching supply must be closely integrated, in the past, the kind of pipe a section, do not communicate with each other, disconnected from each other, the lack of a holistic view of the situation, is the kiln age of kilns for a long time wandering into one of the important reasons. Now the question is how to implement? By whom to implement, first of all, who will combine the four aspects? According to past experience, with strong technical strength of science, industry and trade integration of refractory supporting group companies is most suitable, he on the one hand, according to the refractory performance of a deep understanding and data mastery, you can design and use the department to provide a variety of high-quality supporting refractory materials required, and tracking the use of the situation, and continue to provide services to users to assist in solving the use of the problems that may arise in the four sides string up, often Communication, complementary advantages, to form a whole, and work together to improve the kiln age and various related technical and economic indicators and efforts. Of course, industry associations should also give full play to the functions of industry self-regulation and industry coordination, organising industry elites to achieve this goal.

Thirdly, based on improving the quality of molten glass, extending the age of the kiln, adopting new technologies such as oxy-fuel combustion and the drive for environmental protection. Refractories for the glass industry must have a greater development. We believe that we should strengthen the work in the following three areas. 1, perfect and improve the existing production process and improve the level of existing equipment to further improve product quality and its stability and yield. Combined with the problems in the production of refractories and the defects exposed in the use of the process. Solidly do some applied basic theoretical research. Such as: the use of computer simulation research casting refractory annealing process casting temperature field and stress, refractory materials using the process of destruction mechanism, etc., at the same time to be good at using the theory of other disciplines to guide the analysis of the problem. Such as: metal casting theory, the mechanism of glass bubbles and exclusion, etc., so that the process parameters more reasonable, fundamentally improve the existing process, while improving the existing level of equipment, reduce the impact of human factors. It should be said that after a long period of production practice and continuous improvement and enhancement, the production process is basically reasonable, but the level of the current level said there is still some room for improvement. Some factors affecting product quality and yield can not be grasped, yield is sometimes high and sometimes low, product quality is not stable enough to change the situation must be changed. 2, research and development of new products and refractories, so that the configuration of the kiln refractories more reasonable and further extend the age of the kiln and the relevant technical and economic indicators. It should be said that the current configuration of the kiln refractory materials is basically reasonable, but with the further improvement of glass quality and extend the age of the kiln needs, as well as modern kiln operating conditions more demanding kiln refractory materials in some parts of the kiln is not enough to adapt. Such as: the picture tube glass melting kiln some key parts of the erosion is serious, requiring the use of non-centralised shrinkage with uniform dispersion of pores better thermal shock resistance of fused casting AZS bricks is more suitable: outside, the upper part of the body more suitable for low glass phase fused casting AZS series of products, need to be developed, the formation of a new combination of work in this area there is still a lot of work to be done to continue to develop according to the development of the needs of the formulation of the development of new varieties, make the Kiln refractory material preparation more reasonable. Also put forward in particular is to continue to improve the operation of the workers' technical uneven cultural quality, so that they generally understand the process principles of the various processes, why should be operated in this way, so as to operate blindly to consciously operate according to the operating procedures, which is essential to improve product quality. It is difficult to imagine a low cultural quality, blind operation of the team, can produce high-quality products. 3, tracking the glass kiln using oxyfuel and other new technologies and further development of refractory requirements, the development of new varieties of refractory materials and new formulations required to promote the progress of modern kilns. Oxyfuel technology in the glass kiln in the adoption of foreign rapid development, since 1983, the United States appeared in the first natural gas combustion gas combustion pool, Europe, the United States, Asia, a number of countries built more than a hundred of oxyfuel kilns, the development momentum is rapid manganese. However, due to the use of oxyfuel, the kiln alkali vapour and water vapour concentration increases to accelerate the erosion of refractory materials, especially the upper structure, the current use of silica bricks have been difficult to cope with. Therefore, it is necessary to find the corresponding replacement material, and make the whole kiln refractory material reconfiguration, in order to maintain the high kiln age of the kiln. In this regard, foreign countries have carried out a lot of work, the more popular materials are fused alumina refractory materials and fused AZS refractory materials, as well as spinel bricks, etc., we should grasp the work.

In recent years, a new glass melting process has emerged in the United States, a major breakthrough in energy saving and improving melting quality. The new process throughout the melting process maximum temperature does not exceed 1400 ℃, lower than the traditional process 100 ~ 200 ℃, energy consumption greatly reduce air pollution. In addition, this new process has a thin layer of glass liquid, heat transfer, vacuum clarification of high efficiency, good glass quality, extend the service life of refractory materials and other characteristics, should be paid close attention to in order to adjust the refractory materials in a timely manner in the direction of work. In recent years China's glass industry requires refractories, due to the basic variety of crystal, the quality continues to improve the configuration of each part of the basic reasonable, well-maintained operation, and thus the age of the melting kiln kiln breakthrough has long hovered in the level of 3 to 4 years, reached 5 to 8 years. Currently is moving towards 10 years or higher goals. In order to adapt to the development of the glass industry after accession to the WTO, the refractory industry is also facing a new round of development requirements. We believe that bigger and stronger strength of science, industry and trade integration of science and technology-based refractories supporting group leading enterprises to improve the design, production, use, the combination of scientific research; to further improve and improve the refractory production process, improve product quality, research and development of new varieties, in order to enhance the level of configuration and tracking of refractory materials for the development of the glass industry will be the next period of time the main refractory materials for the glass industry development direction.