Method for firing refractory brick

Abstract

The present invention relates to method of baking brick, and is especially the method of baking refractory brick. The baking process of refractory brick includes the following steps: providing one kiln for baking refractory brick; loading lumpy coal and refractory brick adobe inside the same kiln chamber; igniting the lumpy coal; and opening the wind channel. The lumpy coal is anthracite and the coal / brick adobe weight ratio is 0.3-0.35. The present invention has the advantages of low kiln building cost, low baking cost, no black smoke to pollute environment, high heat efficiency, etc.

Description

technical field [0001] The invention belongs to a firing method of bricks, in particular to a firing method of refractory bricks. Background technique [0002] Historically, refractory bricks have been fired using downdraft kilns and flint kilns. The fuels used are mainly bituminous coal, gas and heavy oil. As we all know, both bituminous coal and anthracite are composed of fixed carbon, volatile matter, ash The difference is that bituminous coal has low fixed carbon, high volatile content, easy to ignite, and long flame, while anthracite is the opposite. It has high fixed carbon and extremely low volatile content, is not easy to ignite, and has a very short flame. All of them use bituminous coal as fuel. There are thousands of such enterprises across the country. Take the downdraft kiln as an example. figure 1 , figure 2 As shown, it is composed of three parts: combustion chamber 1, kiln chamber 2, and chimney 3. Bituminous coal is put into the combustion chamber. After ...

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Problems solved by technology

However, this kind of downdraft kiln can only burn bituminous coal. It will be different if anthracite is used instead. When anthracite is burned, there is no volatile matter, and there is no secondary combustion flame in the kiln chamber. The distance from the combustion chamber is too far to be directly heated, and the heat radiation and the hot air flow formed by the air passing through the combustion chamber under the action of the suction of the chimney will bring limited heat into the kiln chamber and conduct it to the refractory bricks. About 900°C, which is far from the firing temperature of refractory bricks at 1300°C

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