Effects of organizational structure on performance of refractory materials

Influence of refractory materials under various physical, chemical reactions at hightemperature in the process of using the occurrence of corrosion, wear, or split and cause damage. Therefore, refractory material must have the ability to adapt to various working conditions, and the performance and composition and structure is closely related to the.

Chemical composition is the basic characteristics of refractory materials; the main component is the basic feature ofrefractory material, so the composition and quantity directly determines the performance of refractory materials. Refractory products at the same time, mineral composition, product properties are the comprehensive reflection of minerals and micro structure, and therefore cannot only from the chemical composition analysis of the effect on the properties of products. The refractory material of mineral composition and depends on the chemical composition and process conditions. Although the same chemical composition. If the different processing conditions. The crystalline phase and the number of mineral species will also have the difference, the different properties of refractory materials. However, it must be stressed that refractory material macro organizationalstructure is an important factor which influences the performance, and performance index and can reflect the internal structure ofrefractories. For example: – densification properties of porosity, density, true density body Zhi said gas permeation properties of the ease of permeability: properties thermal properties of linear expansion coefficient, thermal conductivity, heat capacity and thermal conductivity; representation properties mechanical properties and high temperature strength, high temperature often pits, bending strength high temperature tensional strength, high temperature creep and elastic modulus; as, refractoriness, refractoriness under load, high temperature and volume stability, thermal shock resistance and slag resistance of high temperature performance.

Therefore, the use of departments must be from the characteristics and process of thermal equipment requirements, carefully selected according to the chemical composition, mineral structure, refractory material and macro microstructure and performance indicators, in order to achieve the desired effect

Correct using method make refractories have anti damage ability

Supporting the development of refractories for the clinker rotary kiln each work with the different mining conditions, targeted to different anti damage of refractory materials, andconsidering the basic matching problem with various working lining life, reduce maintenance times to stop the kiln, each work with lining, the anti damage of independent and phase the purpose of matching cycle. Lining material preheating with good chemical stability, alkali erosion leaf wax stone brick and strong, the pyrophyllite using low alkali and high alkali bricks siliceous raw material, the raw material made of, whether or not to burn the Chengdu firing with anti alkaline strong, but the strength is high, nearly doubled than clay brick life.

The industrial trials in Xinmi Changxing Refractories Co., and recommended for coke oven chamber wall three hot repair methods: flame spraying; ceramic welding using oxygen; theexothermic material (heating material) to repair. The process is: with the help of the principle of common heat generated to form a protective layer on the surface of masonry of refractory material to repair the surface.

Flame gunning method of flame gunning refractory products, powder particles melt in the liquid or gaseous fuel to the flame, and was sent to the surface to be repaired. The masonry is nozzle flame of heating, so using this method without special restrictions on the temperature, but also can be used to refractory powder cheaper to obtain high quality spraying layer. The principle of the ceramic welding method is added to the material of strong oxidant (exothermic material: aluminum, silicon etc.). Wind transport by means of oxygen jet flames, oxidant and refractory powder to the surface to be repaired.