Insulation refractories (Refractory material) in the second heat transfer process at the same time, present in refractories (Refractory material) stomatal pores in the air along the flow path from the hot face lining the cold, thus the heat from the furnace lining The heat brought to the surface where the lining of the cold casting refractories do the most professional, this heat flow mechanism called convection. However, where most of the best casting refractories, refractory only (Refractory material) in Which cast refractories do best, porosity and pore channels are usually small, great resistance to airflow, thus refractories (Refractory material) within The convective heat transfer plays a very small role, are generally negligible. Refractories (Refractory material) can be divided into three categories according to refractoriness: (1) general refractories (Refractory material): refractoriness of 1580-1770 ℃. (2) Advanced refractories (Refractory material): refractoriness of 1770-2000 ℃. (3) super refractories (Refractory material): refractoriness higher than 2000 ℃. Where do the best casting refractories, Refractories shangzhuang (certified), casting refractories by shangzhuang Refractories Co., Ltd., Zhengzhou City. Zhengzhou City shangzhuang Refractories Co. (www.yntjj.com.cn) (www.yntjj.com.cn) is Zhengzhou, charge, flux leader, over the years, the company is implementing the scientific management, innovation and development, honesty and trustworthiness guidelines, and satisfy customer needs. In shangzhuang refractory leadership with the staff warmly welcome all inquiries negotiations to create shangzhuang Refractories a better future. You can also access (www.yntjj.com.cn/supply_details_45479465.html), for more information about the company.