Lining brick structure for cooling section of coke dry quenching furnace and building method

Abstract

The invention provides a lining brick structure for a cooling section of a coke dry quenching furnace. The lining brick structure is prepared from the combination of a working layer and a heat preserving layer, wherein the interface between the working layer and the heat preserving layer is arc-shaped, or sawtooth-shaped or concave-convex; the working layer is controlled to be 230 to 500mm in thickness, and the heat preserving layer is controlled to be 20 to 75mm in thickness. The building method is that the cooling section of the coke dry quenching furnace is divided into a lower cooling section, a transition cooling section and an upper cooling section from bottom to top; the thickness of a compound lining brick for building the lower cooling section is 1.01 to 1.3 times that of the compound lining brick for building the upper cooling section; and the thickness of the compound lining brick for building the transition cooling section is gradually reduced and in smooth transition from the lower cooling section to the upper cooling section. Compared with the prior art employing B-grade mullite bricks, the building method has the advantages that the abrasion of the lining bricks for building the cooling sections is obviously reduced by at least 25%; and the lining brick layer at the lower cooling section is in balanced erosion, so that the service cycle is obviously increased, and as a result, the working rate of the coke dry quenching furnace is correspondingly raised, and the maintenance cost is decreased.

Description

technical field [0001] The invention relates to a refractory brick structure and a masonry method, in particular to a lining brick structure and a masonry method for a cooling section of a CDQ coke oven. Background technique [0002] CDQ coke oven technology has developed rapidly. From the 75t / h CDQ coke oven introduced by Baosteel to today's large-scale CDQ coke oven, the lining structure and materials have changed a lot. CDQ ovens generally have a pre-storage section, chute, annular air duct, and cooling section; at present, there are many problems in domestic CDQ chute and annular air duct. [0003] After retrieval: the Chinese patent application number is CN200910219854.8, which discloses a CDQ furnace with a new structure of annular air duct and chute, which is aimed at the problems existing in the CDQ furnace's annular air duct and chute technical measures taken. [0004] The Chinese patent application number is CN200910219858.6, which discloses a CDQ furnace with a ...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the shortcomings of the B-grade mullite bricks used in the prior art that the lining bricks have a fast erosion rate, unbalanced, and short service life, and provides a kind of wear rate that is higher than that of the B-grade mullite bricks used in the prior art. The lining brick structure and masonry method for the cooling section of CDQ coke oven with a reduction of at least 25% and a balanced erosion rate

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