Castable is a kind of unshaped refractory. Although there are many varieties, the construction methods are generally mold tire pouring, anchor pouring, mold tire tamping and spraying. Mold tire construction is to make the mold tire in advance, then mix the unshaped refractory evenly into the mold tire, compact the material with a mixing rod or tamping hammer, and demould after a period of time, The demoulding time shall be determined according to the properties of the material, generally 24-48h
The baking of castable shall formulate the temperature rise curve according to the performance change of refractory and the change of binder during the temperature rise process. Generally, the following points shall be paid attention to:
1) Temperature and holding time of water discharge
2) Curing time
3) Mineral phase transition temperature and holding time of refractory
4)The purpose of the decomposition temperature and holding time of the binder is to ensure that the castable will not produce cracks during the holding process and achieve more and more firmness until it reaches perfect sintering during use and maintains excellent use effect
