Inner sleeve building system of upper part of sleeve kiln and sleeve kiln

By using a masonry system consisting of a steel fiber refractory castable layer, a clay castable layer, and a brick support flange in the upper inner sleeve of the sleeve kiln, the problems of easy detachment of refractory bricks and insufficient impact resistance at the bottom in traditional masonry methods have been solved, thus achieving high-precision and long-life operation of the sleeve kiln.

CN116854385BActive Publication Date: 2026-07-07BEIJING SHOUGANG CO LTD
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Patent Information

Application Number
CN202310889932.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-07-19
Publication Date
2026-07-07
Estimated Expiration
2043-07-19

AI Technical Summary

Technical Problem

Traditional methods for constructing the upper inner sleeve of a sleeve kiln have several drawbacks, including difficulty in controlling the precision of refractory brick construction, easy detachment of refractory bricks, weak impact resistance at the bottom of the upper inner sleeve, and insufficient service life. These issues result in the steel inner sleeve losing its protection and posing a risk of collapse.

Method used

The upper inner sleeve masonry system of the sleeve kiln is composed of steel fiber refractory castable layer, clay castable layer, inner and outer high temperature resistant layers, and inner and outer support flanges. Through integral casting and zoned load-bearing design, the masonry accuracy and overall strength are improved, the number of refractory bricks is reduced, and the impact resistance of refractory materials is enhanced.

Benefits of technology

It achieves precision control and verticality requirements for the upper inner sleeve of the sleeve kiln, reduces the risk of refractory material falling off, extends service life, improves production safety and stability, and reduces production costs.

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Abstract

This invention discloses a refractory lining system for the upper inner sleeve of a sleeve kiln and the sleeve kiln itself, relating to the field of refractory material lining technology for industrial furnaces and kilns. In this system, a steel fiber refractory castable layer is cast on the inner circumference of the bottom of the upper inner sleeve and outside the bottom steel section, while a first clay castable layer is cast on the outer circumference of the bottom of the upper inner sleeve and outside the bottom steel section. An inner high-temperature resistant layer and an outer high-temperature resistant layer are respectively positioned on the inner and outer circumferences of the upper inner sleeve. An inner brick-supporting flange is transversely positioned within the inner high-temperature resistant layer, and an outer brick-supporting flange is transversely positioned within the outer high-temperature resistant layer. In this system, by bearing a portion of the weight of the refractory bricks through the brick-supporting flange, the refractory lining accuracy of the entire upper inner sleeve is controlled by zones, improving molding performance and overall strength, reducing the risk of refractory material collapse, and achieving long-life safe operation of the refractory material in the upper inner sleeve of the sleeve kiln.
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