What Kind of Refractory Bricks are Used at the Bottom of the Shuttle Kiln?

2023-08-04 16:59:05

The shuttle kiln is a traditional kiln mainly used for the production of ceramics, bricks, building materials, etc. It gets its name from the shape of the shuttle inside the kiln, through which raw materials and products can be fed into and out of the kiln.

The kiln body space (kiln chamber) of the shuttle kiln is composed of the kiln wall, kiln roof, and kiln car lining bricks. The inner kiln wall of the shuttle kiln is made of lightweight refractory bricks with better resistance to rapid cooling and rapid heating. The inner surface of the insulation layer can be pasted with 50mm thick high-temperature resistant refractory fiber to prolong the service life of the heat insulation material. In order to improve the strength and airtightness of the kiln, the outside of the kiln wall is usually wrapped with a layer of 3-5mm thick steel plate. The modern all-refractory fiber shuttle kiln directly uses refractory bolts to fix the refractory fiber blocks on the inner side of the metal shell.

Heat Storage and Energy Saving Mode of Shuttle Kiln
1. The heat storage and energy saving of the kiln is accomplished through its own heat storage burner, which is mainly composed of a heat storage book, fuel nozzle, high-temperature air nozzle, heat insulation pipe, reversing valve, and so on. Usually, four regenerators and corresponding four independent gas passages are installed on the burner, and two opposite regenerators and gas passages form a working group. In this way, one working group is spraying flames, and the other working group plays the role of exhausting heat and storing heat and switches through the reversing valve after a period of time.

2. The working process of the self-regenerative burner: When the self-regenerative burner is working, the high-temperature flue gas enters the two regenerators under the action of the induced draft fan and transfers heat to the regenerator. Let the flue gas temperature drop below 200°C and discharge. When the heat storage of the regenerator is close to saturation, the reversing valve is switched so that the air enters the regenerator from the opposite direction, and the high-temperature regenerator heats the combustion-supporting air, while the regenerator is cooled, and the fuel cycle is completed in this way. Combustion and heat recovery.

The bottom of the shuttle kiln generally uses high-alumina refractory bricks as refractory materials, because high-alumina refractory bricks have high slag resistance and compressive strength, can withstand high temperature and pressure, and are not easy to break or deform. In addition, high alumina refractory bricks have good wear resistance and corrosion resistance and can be used at high temperatures for a long time, so they are widely used in various high-temperature industrial equipment, including kilns and furnaces.

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