Refractory mud, refractory cement, refractory castable are all unshaped refractories, and they are commonly used in the refractory industry. Refractory mud is used for building refractory bricks. Refractory mud is also called refractory cement or jointing material. Used as a jointing material for masonry of refractory products. Refractory cement is a material for making refractory concrete. The refractory castable is made of refractory aggregate, powder and binder. It is also called castable because of the pouring construction.
First, refractory mud.
Refractory mud can be divided into clay, high alumina, silicon and magnesium refractory mud according to materials. It consists of refractory powder, binder and admixture. Almost any refractory material can be made into the powder used to make refractory mud. The general refractory mud, which is made by using refractory clinker powder and a suitable amount of plastic clay as a binder and plasticizer, has a low strength at normal temperature, and it has a high strength when it forms a ceramic bond at high temperature. Chemically bonded refractory muds that use hydraulic, gas, or thermosetting bonding materials as bonding agents will undergo a certain chemical reaction and harden before the temperature below which the ceramics are bonded. 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 the masonry refractory products. In addition to refractory mud as a jointing material, it can also be modified or sprayed as a maintenance coating for the lining.
Second, refractory cement.
Refractory cement is also called aluminate cement. Aluminate cement is a hydraulic cementitious material made from bauxite and limestone, calcined clinker with calcium aluminate as the main component and alumina content of about 50%. Aluminate cement is often yellow or brown, and sometimes gray. The main minerals of aluminate cement are monocalcium aluminate (CaO · Al2O3, abbreviated CA) and other aluminates, and a small amount of dicalcium silicate (2CaO · SiO2). Used for cementing various refractory aggregates (such as corundum, calcined high-alumina bauxite, etc.), making refractory castables or refractory concrete, used as lining for industrial furnaces.
Third, refractory castable.
Refractory castable is an unshaped refractory that is widely produced and used now. Primarily used for the construction of overall structures such as various furnace linings. Certain high-quality varieties can also be used in smelting furnaces. Such as aluminate cement refractory castable can be widely used in various heating furnaces and other slag-free, acid-base corrosion-free thermal equipment. In places subject to corrosion by molten iron, molten steel, and slag, and where the working temperature is relatively high, such as tapping tanks, ladles, blast furnace bodies, tapping ditch, etc., the combination of low calcium and pure high alumina cement Refractory castables made of high-quality alumina and fine sintered high-quality granular and powdery materials. As another example, phosphate refractory castables can be widely used in heating furnaces and soaking furnaces for heating metals, as well as in coke ovens and cement kiln parts in direct contact with materials. In some parts of metallurgical furnaces and other containers that are in direct contact with slag and molten metal, repairing with high-quality phosphate refractory castables also has excellent results.
From the above, we can see that although the three products are all amorphous refractories, their uses are very different, and each product is divided into different models and types, so you can consult a professional technician when purchasing , Choose the right product, so as not to delay the construction period and cause unnecessary losses.
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