2015年2月12日星期四

Applications of silicon carbide

As everyone knows, silicon carbide has a very broad application field, in the field of abrasive, chemical, metallurgy, high-grade refractory materials, advanced ceramics have a very versatile. Silicon carbide is a special material machinery industry chain upstream link – wafer productionfiberprocess, mechanical industry development, silicon carbide industry has brought some opportunities by expanding and upgrading of product structure and the downstream demand.
Refractory materials and machinery are silicon carbide traditional low-end applications, low added value. With the continuous innovation of the processing equipment and technology, aiming at strengthening the development of the new use of silicon carbide and new application market, expand the business ideas, is the only way for the healthy development of the silicon industry in the future.
Silicon carbide are used widely, such as metallurgy, machinery, chemical industry, mining machinery, light industry, electronics, a heating body, abrasive can be used as a metallurgicalfire Brickindustrial purifying agent, deoxidizing agent and modifier. In the mechanical processing can be used as synthetic cemented carbide; silicon carbon plate after processed can be used for roof plate as refractory ceramic firing. By finishing the production of powder, can be used in the high-tech electronic components and far infrared radiation material coating, high purity micro powder can be coated for national defense industry stone machine industry Aerospace ware, use in every field of economy of domestic and international is very wide.
Production and processing of silicon carbide is dependent on the crusher and mill equipment, and because of its special requirements, so it is necessary to select appropriate crusher products can meet the requirements of. The broken plastic, red star heavy sand making machine is suitable for soft or hard and super hard materials, widely used in all kinds of ores, cement, refractories, aluminum where soil clinker, glass raw materials, mechanism building sand, stone and various metallurgical slag, especially for silicon carbide, Jin Gang sand, sintered bauxite, beautiful sand high hard, and very hard abrasive resistant material than other types of crusher yield higher efficiencies.

2015年2月9日星期一

New type refractory -magnesia calcium brick

Magnesia calcium brick also called high calcium magnesium brick. In order to periclase as main crystal phase, silicate calcium for three secondary crystalline phase of magnesiafire brickrefractories. Containing MgO80% ~ 87%, CaO6% ~ 9%, CaO/SiO2 than in 2.2 ~ 3. The show structural characteristics of periclase and two calcium silicate calcium silicate and three direct contact, eutectic (interstitial 4CaO – Al2O3 – Fe2O3 into veinlets filled in the silicate calcium silicate calcium two and three between. Low porosity. Refractoriness under load was generally higher than 1700 DEG C, good performance of anti alkaline residue. But poor thermal shock resistance. Taking calcium magnesite as raw material, and through crushing, proportioning, mixing, molding, firing at 1550 to 1600 degrees. Can be used for side blown converter steelmaking at eye, open hearth and oxygen converter etc…
Magnesia calcium brick is basic refractory products with MgO and CaO as the main chemical components, including dolomite brick and magnesia dolomite brick. Magnesia calcium brick refractory Brickwith excellent performance, especially with purifying molten steel performance is other kind of refractory materials do not possess. Therefore, magnesia calcium brick has been widely used in AOD furnace, VOD furnace and LF furnace refining equipment, and have achieved good results.
Magnesia calcium brick with seven properties, respectively, high temperature resistance, slag corrosion resistance, anti stripping performance, wear resistance, purifying molten properties, hydration resistance.
Along with our country stainless steel and all kinds of clean steel production capacity continues to expand, all kinds of refractories consumption will continue to increase. For better production and use of magnesia calcium brick, for China’s steel industry and other high temperature industrial services, to analyze and discuss the use performance of magnesia calcium brick, with understanding and knowledge of magnesia calcium brick using performance and influence factors is very necessary.