Roller kiln for producing microcrystalline foam ceramic

Abstract

The invention relates to the field of sintering kilns, in particular to a roller kiln for producing microcrystalline foam ceramic. The roller kiln for producing the microcrystalline foam ceramic comprises a preheating zone, a high temperature zone, a heat preservation zone and a cooling annealing zone. A burner of the preheating zone is arranged below a product. A burner of the high temperature zone is arranged above the product, the spraying direction of the burners is perpendicular to the moving direction of the product, and the caustic surface of the burner is arranged like a Chinese character 'pin'. An impulse burner is adopted as a burner of the heat preservation zone, a transition zone is arranged between the heat preservation zone and the cooling annealing zone, and the transition zone is an air brattice formed by a hot air burner. The hot air burner is connected with an air pipe, and the air pipe is further connected with the cooling annealing zone and the heat preservation zone. An air blower and a heating box are also arranged inside the air pipe, an air inlet of the air blower is connected with the cooling annealing zone, and an air outlet of the air blower is connected with the transition zone and the heat preservation zone through the heating box. According to the roller kiln for producing the microcrystalline foam ceramic, heated temperature of the microcrystalline foam ceramic is stable, temperature difference is small, product quality is improved, and production efficiency is greatly improved. Due to the fact that a hot air circulating system is adopted, energy consumption is reduced, and the roller kiln for producing the microcrystalline foam ceramic is environmentally friendly and saves energy.

Description

technical field [0001] The invention relates to the field of sintering kilns, in particular to a roller kiln for producing microcrystalline foam ceramics. Background technique [0002] Microcrystalline foamed ceramics is a porous high-strength microcrystalline silicate material produced by ceramic technology. As a new type of thermal insulation material, it has the following advantages: a wide range of raw materials, in addition to ceramics, shale, Slate, coal gangue, fly ash, construction waste and other silicate solid wastes are used as raw materials; it is non-combustible, the fire rating is Class A, the service temperature can reach 1000 degrees Celsius, and it does not produce any toxic and harmful gases. It is an environmentally friendly material ; Good thermal insulation performance, thermal conductivity is 0.065w / m.k; light weight, 150~400 kg / M 3 , high strength, compressive strength of 4Mpa, compressive strength of 2Mpa; good frost resistance; thermal expansion coe...

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Problems solved by technology

[0003]At present, the production of microcrystalline foam ceramics is generally produced by tunnel kilns. The production of microcrystalline foam ceramics in tunnel kilns has large temperature differences in the kiln section, low product qualification rate, and low production efficiency. Disadvantages such as high labor intensity, low degree of automation, and high energy consumption, uneven annealing of products and incomplete elimination of internal stress will cause serious defects such as product breakage or cracking in the later stage

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