Refractory mud, refractory cement, and refractory castables are all unshaped refractory materials, and they are commonly used in the refractory industry. Refractory mortar is used to build refractory bricks. Refractory mortar is also called refractory mortar or joint material. Used as a jointing material for refractory masonry. Refractory cement is a material for refractory concrete. Refractory castables are made of refractory aggregates, powders and binders. They are also called castables due to the use of pouring construction.
1. Refractory clay
Refractory mud can be divided into clay, high alumina, siliceous and magnesia refractory mud according to the material. It is composed of refractory powder, binder and admixture. The general refractory clay made by adding refractory clinker powder and appropriate amount of plastic clay as binder and plasticizer is called general refractory clay. The particle size of refractory mud varies according to the application requirements, and its limit particle size is generally less than 1mm, and some are less than 0.5mm or finer.
The selection of refractory mud materials should be considered together with the materials of refractory products of masonry. In addition to being used as a jointing material, refractory mud can also be used as a maintenance coating for the lining by alteration method or spray method.
2. Refractory cement
Refractory cement is also called aluminate cement. Aluminate cement is a hydraulic cementitious material made of bauxite and limestone as raw materials, calcined to produce clinker with calcium aluminate as the main component and about 50% alumina content, and then ground. Aluminate cement is often yellow or brown, but also gray. Used as lining in industrial kilns.
3. Refractory castable
Refractory castable is a kind of unshaped refractory which is widely produced and used. It is mainly used to construct various heating furnace linings and other integral structures. Certain high-quality varieties can also be used in smelting furnaces. For example, aluminate cement refractory castables can be widely used in various heating furnaces and other thermal equipment without slag, acid and alkali corrosion. In the parts that are corroded by molten iron, molten steel and molten slag and have high working temperature, such as tapping trough, ladle and blast furnace body, tapping trough, etc., in metallurgical furnaces and other metallurgical furnaces that directly touch molten slag and molten metal Some parts of the container can also be repaired with high-quality phosphate refractory castables.