Coke oven low-aluminum lattice brick and production technology

Abstract

The invention discloses a coke oven low-aluminum lattice brick and a production technology. The coke oven low-aluminum lattice brick is prepared from, by mass, 30% of semisoft clay, 55% of flint clay, 15% of fire-clay grog and 2% of additional organic binding agent sulphite cellulose waste liquor. The lattice brick is a low-aluminum product, the low-aluminum product is a semi-acid refractory product, the size of the product is stable under the high temperature state, the alkali atmosphere resistance is high, the load softening point is high, the high temperature using strength is improved, and the brick is suitable for being used for a coke oven chamber bottom, a heat storage chamber and a perforated strainer; due to the design, the defect that an original material coke oven lattice brick is frequently deformed and blocked is overcome, the novel material is adopted, the service life of the lattice brick can be prolonged, normal heat exchange of a coke oven is smoothly ensured, and coking production stability is effectively guaranteed and supported.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a checker brick used in a coke oven, and also relates to a production process of the checker brick. Background technique [0002] The coke oven regenerator is an important part of the coke oven heating system. Its main function is to preheat the blast furnace gas and air used for heating, to provide conditions for the heating gas to be fully burned in the combustion chamber; to recover the heat of the exhaust gas after combustion. The heat exchange saves the energy consumption required for heating the furnace gas and realizes the recycling of heat. During the service of the 3# and 5# coke ovens of our company, the four-layer checker bricks on the regenerator are often corroded, deformed and blocked. Furnace production. Through discussion and analysis by technicians, the erosion mechanism is obtained as follows: (1) After the coke oven has been in servic...

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Problems solved by technology

[0004] ; (2) 3#, 5# coke oven low-aluminum checker bricks are made of third-class high-alumina (see Table 1), on the one hand, high Al 2 o 3 content promotes the formation of low-melting feldspars in alkaline atmosphere, on the other hand Al 2 o 3 The content is near the area where the mullite phase is formed, and high temperature use is prone to secondary mullite reaction, resulting in checker brick volume expansion and loose structure; (3) 3#, 5# coke oven low-aluminum checker bricks have high potassium and sodium content It itself reduces the high-temperature performance of the storage top

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