- Time:Jan 11, 2023
Refractory materials have a long history of development, as early as more than 4,000 years ago, China's working people can use clay containing fewer impurities to make pottery, and pottery to prepare a variety of molds, used to cast bronze and other devices that need to be prepared under high temperature conditions. Eastern Han Dynasty, people began to use clay refractory raw materials made of porcelain burning sagger and kiln material.
At the beginning of the last century, the main research direction of refractory materials was to prepare refractory products with high purity, high density and super high temperature resistance, such as high refractory fiber, free firing and small energy consumption of indefinite refractory materials.
Since the 1950s, with the outbreak of the third industrial revolution, advanced technologies such as space technology, new energy development technology, and atomic energy technology have developed rapidly, placing more stringent requirements on new high-temperature technologies and the performance of refractory materials. Products for important applications have developed in the direction of high precision, high performance and high technology. The main components of refractories evolve from oxides and silicates to non-oxides and oxides, and may develop into non-oxide composite oxides. Raw materials from natural ore-based into natural, selected and synthetic and other ways to co-exist. The preparation process has become more stringent in terms of material selection, mixing and preparation conditions. The relationship between the composition and content of physical phases, microscopic morphological characteristics and properties is analyzed by precision instruments such as swept surface electron microscopy, X-ray diffractometer, X-ray fluorescence spectroscopy analyzer, and the preparation process - composition and structure - properties and performance interrelationship is established. Greatly optimize the high temperature properties of the material, such as thermal shock resistance, high temperature mechanical properties and high temperature slag erosion resistance.
At present, the development of refractory materials in China has the following shortcomings.
1. Total production exceeds demand.
2. Product quality is unstable, high-quality varieties of a single.
3. Outdated technology and equipment, unable to mass produce quality products.
Combined with the advantages of China's refractory raw material resources, in line with the development trend of refractory materials, committed to the production of high-quality and efficient refractory products, China's refractory materials development direction should be.
1. Development of high-quality synthetic refractory raw materials. Today, more and more high-quality refractory raw materials from artificial synthesis, artificial raw materials production costs are high, expensive, difficult to achieve industrial mass production. Thus, reduce the choice of artificial raw materials, the use of rich magnesite and bauxite as the base material, synthetic high-quality refractory raw materials. If its performance is close to the use of synthetic raw materials, its production costs can be reduced by 30% to 50%, thus obtaining significant economic benefits.
2. Development of special functional refractory materials. Special refractory materials are often used in the key parts of high-temperature technology such as the national defense tip. The working environment of this part of the material's performance requirements are severe, to ensure that the material is safe and reliable in the process of use, foolproof. At present, the main raw materials of special functional refractories are pure oxides, such as Al2O3, MgO, or other nitrogen-silicon compounds, such as Si3N4, SiAlON and other synthetic raw materials. These special refractory materials have remarkable features such as high performance, high precision, high technology and high added value, but at the same time have disadvantages such as expensive. Thus, some scholars use modified or transformed natural raw materials or industrial solid waste to partially replace expensive synthetic raw materials and reduce production costs.
ZHENJIN RERFRACTORIES is dedicated to the research and development, technical solution design, construction and supporting products of refractories for cement, lime, non-ferrous, steel, glass and chemical industries, etc. It is a one-stop turnkey service provider integrating production, marketing, research and export of high-temperature kiln solutions. The service chain runs through the whole project life cycle, including preliminary consultation, design, R&D, construction and safety production, etc. Through the optimal combination of various grades of products to meet different process requirements, we can effectively create value for our customers.
