wanhaorefractory

We can supply RP graphite electrodes, HP graphite electrodes , graphite electrodes, UHP graphite electrodes. The diameter from 75mm to 800mm. We also produce the graphite plates, graphite blocks, graphite crucibles and so on. The annual output of producer is over 80000MT. We have passed the ISO9001:2008 quality certification. Graphite electrodes are manufactured with high quality refractory raw material including petroleum cokes, needle cokes and coal-tar-pitch through the production process of calcining, crushing, burden, mixing kneading, extruding, baking, impregnation, graphitization, manufacturing, packing. Our refractory products are characterized by superior compact structure, good electrical and thermal conductivity, high mechanical strength and high resistance to oxidation and corrosion in high temperature. The high power graphite electrodes are widely use in electric are furnaces and ladle refining furnaces for steel making and used in electric s

Cold crushing strength Cold crushing strength is the ultimate load per unit area of dense shaped refractory products can withstand without damage at room temperature. The cold crushing strength of pressure-resistant refractory products has a great impact for the production, transportation and use performance, so higher cold crushing strength is better. The high crushing strength indicates that the processed quality is good, structure is uniform, and well sintered. High temperature crushing strength High-temperature crushing strength is the refractory products under the specified high temperature conditions, the unit area can withstand without damage. The high temperature crushing strength of refractory products determines the use scope, which is an important basis for the use of refractory materials . High temperature crushing strength indexes are also meaningful to unshaped refractories, especially refractory castables and fire-resistant plast

Corundum bricks are high alumina refractory fire bricks made for extreme demands. The alumina content in corundum brick is from synthetic corundum of high purity, such as white fused alumina or tabular alumina. Additional ingredients are special refractory clays, reactive alumina, and very pure modifications of silica. Corundum bricks are fired at high temperatures to form a matrix with mullite, mullite-corundum or corundum that has excellent volume stability. The service temperature for corundum brick goes up to 1800°C. Corundum bricks can be used in nearly all fields of industrial application where extreme high temperature and increased resistance against aggressive slags and atmospheres are necessary. Such properties or features of corundum bricks are necessary especially in the chemical industry and for the production of carbon black. The addition of chromium oxide, zirconium oxide, and phosphates gives the refractory bricks excellent structural flexibility, which