Thermal radiation coating for kiln

Abstract

The invention discloses a heat-radiation coating material for a ceramic kiln. The heat-radiation coating material contains base materials, additives, a binder, a plasticizer and a solvent, wherein the base materials and the additives are selected from five kinds or all of gahnite powder, manganese-aluminum spinel powder, ilmenite powder, boron carbide, ferric oxide and desilicated zirconium powder; the binder is prepared from liquid aluminum dihydrogen phosphate and liquid magnesium dihydrogen phosphate; the weight percent of the base materials and the additives is 6-75%, the weight percent of the binder is 5-29%, the weight percent of the plasticizer is 0.5-3%, and the balance is the solvent. The coating material has the advantages that the operating temperature range is large, the coating material can be used at the temperature above 1,400 DEG C, and the maximum operating temperature can reach about 2,000 DEG C; the coating material is applicable to various substrates, has strong adhesive power to the substrates and is applicable to acid / base multiple atmospheres, the long-term durability is good, the thermal-shock resistance is strong, the energy source utilization ratio and heat efficiency are increased, the temperature of the substrates covered by the coating material is lowered, the wear resistance and corrosion resistance are good, the environmental impact is little, and the use is convenient.

Description

technical field [0001] The invention relates to a heat radiation coating for a kiln, more precisely, a high-emissivity coating that can improve the thermal efficiency of a furnace, and can be applied to roller kilns, tunnel kilns, and shuttle kilns in the ceramic industry. Background technique [0002] Thermal radiation coatings for ceramic kilns have been applied in many industries. It can be used as a refractory material on the heat-absorbing surfaces of various industrial furnaces. Using the principle of high absorptivity and high emissivity of coatings for thermal radiation, it can improve high temperature The furnace lining absorbs the heat of the furnace flame, improves the heat exchange conditions of the furnace, reduces the heat dissipation of the furnace body, increases the thermal efficiency of energy utilization, and at the same time has a good protection effect on the furnace matrix material, prolongs the service life of the furnace and reduces maintenance worklo...

AI Technical Summary

Problems solved by technology

However, when the coating is applied to a higher temperature, or when working in a multi-component atmosphere for a long time, the performance of the coating will be greatly affected, and the efficiency of the coating will decrease or even fail.