Inorganic anti-radiation coating for lining of radiation chamber of ethylene cracking furnace and preparation method of inorganic anti-radiation coating

Abstract

The invention discloses an inorganic anti-radiation coating for a lining of a radiation chamber of an ethylene cracking furnace. The inorganic anti-radiation coating comprises the following components in parts by weight: 15-20 parts of cobalt oxide, 1-10 parts of zirconium oxide, 3-10 parts of aluminum oxide, 1-5 parts of silica powder, 8-12 parts of silicon carbide, 3-7 parts of chromium oxide, 0-8 parts of manganese oxide, 0-5 parts of carborundum, 2-10 parts of sodium silicate, 5-8 parts of aluminum dihydrogen phosphate, 1-5 parts of quartz powder, 1-5 parts of feldspar powder, 10-15 parts of phosphorus pentoxide, 0-3 parts of chrome iron ores, 0-2 parts of zircon sand, 0-1 part of cerium oxide, 1-4 parts of graphite powder, 0.5-1.0 part of boron oxide and 0.1-0.5 part of carclazyte, wherein the particle of each solid component is not smaller than 350 meshes. The invention also discloses a preparation method of the inorganic anti-radiation coating for the lining of the radiation chamber of the ethylene cracking furnace. By using the inorganic anti-radiation coating disclosed by the invention, the high temperature resistance and thermal shock resistance of the coating can be effectively improved, the utilization ratio of radiant energy can be increased, and the binding force of the coating and the lining material of the cracking furnace can be enhanced.

Description

technical field [0001] The invention belongs to the anti-radiation inorganic coating technology, in particular to an anti-radiation inorganic coating for the lining of a radiation chamber of an ethylene cracking furnace and a preparation method thereof. Background technique [0002] Industrial furnaces are major energy consumers in my country, accounting for about 25-40% of total energy consumption, while the average thermal efficiency of furnaces is only about 30%. Low thermal efficiency of industrial furnaces is a common problem at home and abroad. At present, as a new energy-saving technology in the kiln, radiant coatings are coated with energy-saving radiant coatings on the lining of the kiln to radiate the heat in the kiln to the heated products as much as possible, and will make full use of energy to achieve The purpose of energy saving. [0003] Usually, the heating furnaces used in the ceramic industry and the petrochemical industry mostly use silicon-aluminum refra...

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Problems solved by technology

[0003] Usually, the heating furnaces used in the ceramic industry and the petrochemical industry mostly use silicon-aluminum refractory materials. These materials have poor thermal shock resistance, poor wear resistance, and are easy to become brittle and fall off. When the furnace is heated up, a large amount of heat is absorbed and dissipated. Very low energy efficiency

[0004] In recent years, the application of energy-saving and high-temperature radiation-resistant inorganic coatings in kilns has been widely recognized, but the application in ethylene cracking furnaces has not been successful because the furnace temperature of the cracking furnace is too high, exceeding 1200 ° C; on the other hand, cracking The furnace has a working condition where the furnace temperature rises and falls frequently, and the coating is prone to cracking and falling off during this process, which affects the use effect and service life