Publish Time: 2021-10-29 Origin: Site
The manufacture of monolithic refractories has the method of ramming molding, vibration molding and jet molding. When the masonry of the firebrick or the whole structure is partially damaged, the material can be replaced or the cold and hot repair can be carried out by spraying and projection equipment, which is both rapid and economical. It can also be used as the lining of each part of the kiln and the protective layer and joint material of masonry according to its material characteristics. The production process of refractory castables and refractory plastics is described below.
Here is the content list:
l Refractory castables
l Refractory plastic production process flow
l The shelf life of refractory plastics
The castable is usually formed by pouring and vibrating with a proper amount of water, in which the initial strength is achieved through the hydration and condensation process of the binder, and then used after baking.
l Manufacturing process: raw materials selection, high temperature calcination, sorting, crushing and grinding, scientific ingredients, mixing, inspection and packaging factory.
l Prefabricated parts: mixing, pouring molding, demoulding, maintenance, boring, baking, inspection and packaging factory.
The production of refractory plastics is different from that of refractory castables, such as mixing, squeezing, cutting, packaging and storage. Therefore, it is necessary to increase the equipment such as mud extruders and billet cutting machines.
Mixing is also the use of a forced mixer, because it is wet mixing, it is called mixing. In the mixing process, in order to make the refractory powder encapsulate the refractory aggregate particles uniformly, the feeding sequence is as follows: first add granular material, wet mix part of binder, when the surface of granular material is all wet, add refractory powder, soft clay and admixtures, and add the remaining binder, wet mix for 10~15min.
Mixing good mixing material, can be directly squeezed mud, cutting and packaging, generally is continuous. Mud extruder is a special equipment for the production of refractory plastic, and sometimes the brick press is used to press the blank. After extrusion and rubbing, the mixing material enhances the viscosity, plasticity and uniformity, which can improve its construction performance. If vacuum degassing measure is used, the gas in the billet can be eliminated and its quality can be improved. The long strips extruded from the mud extruder, after cutting the blank, every 4~6 pieces are tightly packed with plastic cloth, and put into the carton with plastic cloth tape seal, and stored in the cool warehouse.
In the mixing and mud extrusion process, it is best to increase a trapped mud process, the mix material stacked together, with plastic cloth cover strict, trapped material 24h, so that the material plasticize and eliminate part of the gas, is conducive to the improvement of plastic performance.
The shelf life of hot hard refractory plastic is 6 months, and the shelf life of gas hard is 3~6 months. During the preservation period, refractory plastic should have good viscoplasticity to facilitate ramming.
There are several kinds of monolithic refractory materials, most of the production process is basically the same.