Refractories (Refractory material) by forming process can be divided into seven categories: (1) natural rock molding process; (2) pressing refractories (Refractory material); (3) casted refractories (Refractory material); (4) plastic molding refractories (Refractory material); (5) Ramming (including mechanical and manual ramming ramming) forming refractories (Refractory material); (6) injection molding refractories (Refractory material); (7) Extrusion refractories (Refractory material). Refractories (Refractory material) the true density is the true density refractories (Refractory material) in the solid mass to its true volume (volume of solid portion) ratio. True specific gravity is the ratio of the true mass of the unit volume of the material mass and 4 ℃ unit volume of water. Both can be considered the same in value. The international community has a true specific gravity of this concept is no longer used, but in Japan refractories (Refractory material) Technology Association of editing and publishing the "refractories (Refractory material) Handbook," a book is still in use true proportion. In refractories (Refractory material) in refractory brick true density is a measure of the degree of conversion of quartz important technical indicators. Different true density SiO2 composed of different minerals, phosphorus BP true density refractory where to buy the smallest, followed by refractory agent cristobalite, quartz maximum. Phase transition in multiphase refractory material when wholesale, the constant chemical composition, according to the data to determine the true density of the material phase composition. For the true density of refractory products and refractory materials, according to the national standard GB / T5071-1997 (identical with ISO5018: 1983) were measured. Refractory Agent | Shaoxing Refractories | shangzhuang Refractories by shangzhuang Refractories Co., Ltd., Zhengzhou City. Zhengzhou City shangzhuang Refractories Co. (www.yntjj.com.cn) (www.yntjj.com.cn) strong, credible, in Zhengzhou, Henan Province of charge, flux and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead shangzhuang Refractories and you hand into the brilliant, for a better future! You can also access (www.yntjj.com.cn/supply_details_48194425.html), for more information about the company.