As a refractory material, castable should be produced according to the corresponding process. If there is a larger material, it should be coarsely crushed first, then finely crushed, and then the finely crushed material should be sieved according to the particle size, and then finely ground. The finished castable should pay attention to maintenance. When removing the mold, be careful not to affect the hardening of the adhesive layer, and moisturizing should be carried out in time after the mold is removed. The following is a detailed introduction.

1. Castables production process

1. There are three types of crushing jaw crushers, and their specifications are indicated by the size of the feeding port. The main products are 250mm×400mm and 600mm×400mm, with a production capacity of 5-20Th, which are used for coarse crushing of bulk materials.

2. Pulverization refers to the medium and fine pulverization of refractory raw materials after coarse pulverization, and is also an important method for preparing granular materials. Its equipment includes cone crusher, roller crusher (referred to as roller crusher) and dry mill.

3. Screening – According to the particle size, the crushed material is divided into different particle sizes. Its equipment includes fixed inclined screen and electromagnetic vibrating screen. The screening efficiency of the former is about 70%, and the screening efficiency of the latter is above 90%.

4. Fine grinding – refers to the production of refractory powder. Its equipment includes ball mills, tube mills (also known as tube mills) and vibration mills.

5. Premixing refers to the premixing of various powders or powders such as additives, additives, binders, fine powders, etc., so it is called premixed powder. Its equipment is double spiral cone mixer, etc. The batching scale generally adopts electronic scale with high precision. The mixer is a forced mixer, which can load the mixture into the dispenser (the dispenser is equipped with an electronic scale). It can also be put into bags directly from the mixer outlet. In addition, there are vertical elevators, belt conveyors and batching vehicles and other equipment.

2. Protection method of castables

1. The quality of the castable has a great influence on the maintenance work after mold removal, and it is necessary to decide whether to remove the mold according to the specific situation. The binder of the castable can have a certain curing and hardening time after curing, so as to obtain sufficient initial strength. So this is important.

2. Cover the castable surface with a wet bag or wet pad after demoulding. And timely watering to keep moist, some inconvenient places. Sprays can be used to spray water on surfaces. Demineralized water should be used on the first day.

3. Some issues need to be paid attention to in the maintenance, such as silicate castables are suitable for watering and curing. It is more important for high alumina cement castables. Wet curing should be carried out after the castable has hardened. However, phosphoric acid castables cannot be cured with water and natural gas and need to be cured in a dry environment.