Processes and apparatus for producing grey brick

Abstract

The invention provides a technology for producing a grey tile and a device thereof. The adoption of the technology and device can continuously produce in a large scale, thereby reducing energy consumption and improving the product qualified rate. The technology process comprises loading the tile green body into a pre-heat belt A in a tunnel kiln 9 by a kiln car 1, then into a high temperature oxidation burning zone B, opening a high temperature lifting kiln door 2 after oxidizing roasting and pulling out the kiln car 1 into upper shield zone C. A bell riser 6 is arranged above the upper shield zone, a reductive protecting gas pipeline 5 is arranged above a bell 3, a small heat-resistant steel nozzle and a U-shaped pipe are arranged on the bell 3 while the small heat-resistant steel nozzle is arranged on top of the bell and the U-shaped pipe is arranged on the inner upper wall. The bell 3 slowly descends through the bell riser 6 and covers the kiln car 1, then a low temperature lifting kiln door 4 is opened and the kiln car 1 with the bell 3 is pulled out and ferried to a reduction zone D through a trailer. After the reduction, the kiln car with the bell 3 is sent to a hypoxia cooling zone E to cool without oxygen, then the cooling air is let in through opening an air vent on the bell to cool the kiln car 1 with the bell 3 till room temperature, finally the technology process of production grey tile is completed after unloading the bell and out of kiln.

Description

Technical field [0001] The invention relates to a production process and equipment for clay bricks and tiles, in particular to a process and equipment for producing green bricks and tiles. Background technique [0002] Due to the high strength, low water absorption, cold resistance of blue bricks and tiles, and different colors, the market price of blue bricks and tiles is higher. At present, horseshoe kilns and tube kilns are generally used to produce blue bricks and tiles. Although these kilns are simple in process and low in cost, they have serious pollution, high energy consumption, low product qualification rate, and low production efficiency. The serious pollution is due to the use of coal as fuel, which will produce a large amount of smoke and dust during the combustion process, especially in the reduction process, due to insufficient combustion of coal will produce high-concentration smoke, which contains a large amount of sulfur dioxide, It will cause serious pollu...

AI Technical Summary

Problems solved by technology

The reduction and cooling method of this method has the disadvantage that the residual oxygen in the cooling gas is not easy to be completely removed, and it is easy to cause secondary oxidation of the green body.

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