CA-50 cement refractory castable introduction

CA-50 cement refractory castable is made of CA-50 cement as a binder, mixed with refractory aggregates and powders or admixtures in proportion, mixed with water, formed and cured. It is characterized by fast hardening, high strength, low price and easy availability, and convenient construction.

CA-50 cement refractory castable Usage

When using aluminum silicate materials to configure refractory castables, it has a certain resistance to sulfate corrosion. The use temperature of the castable is about 1400°C. In the past, CA-50 cement refractory castables were widely used in thermal equipment such as steel rolling furnaces, which can realize mechanized furnace construction and have a service life of 2 to 4 years: now, the castables are mainly used in boilers and petrochemical industrial furnaces. In metallurgical systems, low-temperature thermal equipment is also used, and achieved good results.

CA-50 cement refractory castable Ratio

CA-50 cement refractory castable is an important variety in unshaped refractory materials. Generally, the common mixing ratio is, the total amount of CA-50 cement and refractory powder is 27%~30%, and the amount of refractory aggregate is 70%. -73%. The amount of CA-50 cement is 10%~20%. When refractory castables are used for medium and high temperature parts, the amount of cement should be minimized and the amount of refractory powder should be increased at the same time. Its grade should be the same as or one higher than the refractory aggregate: the refractory aggregate should be reasonably selected according to the temperature of the kiln. Make the best use of everything. The particle gradation usually adopts two-stage gradation, and can also be controlled by aggregates. Generally, the sand ratio (that is, the ratio of the fine aggregate to the entire aggregate) of 0.45 to 0.55 is used to control: the water consumption is generally expressed by mass percentage, and It can be expressed in kilograms per cubic meter or water-cement ratio (that is, the ratio of water to cement and powder). The general principle is that the amount of water should be minimized while ensuring the workability of the castable mixture.
 
It should be pointed out that the commonly used mix ratio is not static. It will determine the mixing ratio of refractory pouring during production or construction according to the types of raw materials and use conditions, so as to meet the requirements of the kiln project. Colleagues, admixtures should be added as much as possible to improve the construction performance and fire resistance of the castable.