1. Drastic changes in temperature cause refractory castables to be damaged too quickly. The thermal shock stability of refractory castables is relatively poor, and severe temperature changes can easily damage them. For example, the cooling zone of the rotary kiln is not only subject to the erosion of clinker, but also constantly receives the effect of secondary high-temperature clinker. The kiln lining material is sometimes buried under high-temperature materials, and sometimes exposed to flames, causing the surface temperature of the lining material to change with the rotation of the kiln, with a temperature difference of more than 200 degrees Celsius. If it is a cold cellar. This temperature change will be more severe, which are factors that cause damage to refractory castables. 2. The falling anchors form pieces of refractory castables. During the use of refractory castables, the falling anchors play a role in tightly sticking to the container wall, maintaining the integrity of the castables and resisting bending of the castables. In the places where the refractory castables fell in pieces, inspection found that many places had fallen off by their roots, leaving only traces of some solder joints. 3

1. Production process of steel fiber castables The steel fibers used in refractory castables generally have a diameter of 0.4-0.5mm and a length of 25mm. The shape and cross-section of the steel fibers are crescent-shaped. The amount of steel fiber added to the castable is 1~5% (weight), and the length and amount of steel fiber should be appropriate. Generally, water is added to the mixture first and then the steel fibers are added for full mixing. This not only enables the mixture to be stirred evenly, but also saves 1/3 of the mixing time compared to stirring the steel fibers in dry materials. The molding can be vibrated externally, or a vibrating rod can be used to vibrate inside the mixture, and dense products can also be obtained. The maintenance and drying of steel fiber castables are the same as those of ordinary castables.