wanhaorefractory

1. Add ferronickel or top crops and back end crops to the bottom of the furnace, (the center must be flattened), sintering can be started when the furnace is half full. 2. When sintering, the voltage should start from 100kw. After half an hour of operation, the voltage can be pulled to about 250kw. At the same time, it is necessary to constantly observe whether the forma is cut off due to excessive voltage and the furnace is bulged. If one of them occurs, The voltage should be lowered immediately, and the scrape in the furnace should be red before pouring in molten steel.(It is recommended that the furnace be sintered for no less than 3 hours) 3. The temperature of the molten steel should not be lower than 1600 ℃. After the molten steel is filled, the voltage should be pulled to 800kw. The voltage should be pulled up by 100kw to 150kw every 10 minutes till the temperature reaches 1720 ℃. The holding time should be no less than two hours. (During the heat preservation ...

High alumina high strength castables is low cement castable with cement content of less than 8%. Its difference between ordinary   refractory   castable is that most of the matrix of calcium aluminate cement is substituted by superfine powder, In conjunction with an appropriate amount of additive. It meets and exceeds performance ordinary cement castable. Its main features are as follows: 1.Low cement content, that is, low calcium oxide content, reducing the generation of low-melting substance in the material, thereby increasing   refractories   , high temperature strength and resistance to slag product. 2.Stirring castable is only about one-half of ordinary water , thus increasing the density of the castable, porosity decreases. After forming conservation, it generates less cement hydrates. There have many kinds of refractory castable in our factory. Such as   Ladle Castable ,Tundish Permeable Layer Castable,   Heating Furnace Castable   and ...