Furnace building method for rotary kiln tube body inner liner

Abstract

The invention relates to a furnace building method for a rotary kiln tube body inner liner. The furnace building method comprises the steps that (1) a tube body is divided into a plurality of sections in the diameter direction, and then, the tube body is divided into a plurality of strips in an axial direction; (2) fireproof combined blocks are manufactured; (3) the fireproof combined blocks are welded on the tube body in the axial direction, and a line of fireproof combined blocks are arranged in the section of tube body; (4) the step (3) is repeated, and a plurality of lines of fireproof combined blocks are installed; (5) an anchoring element is welded in a tube body strip seam of the fireproof combined blocks; (6) a fireproof heat insulation plate is arranged in a tube body strip seam of the anchoring element; (7) fireproof casting materials are fully filled in the strip seam provided with the fireproof heat insulation plate; (8) the fireproof casting materials are dried and cured, and the furnace building construction of the region is completed; the steps are repeated until the furnace building construction of the whole rotary kiln tube body inner liner is completed. The furnace building method has the advantages that the structure is simple, the construction is convenient, the cost is low, the heat insulation performance of a rotary kiln can be improved, the energy consumption of the rotary kiln can be reduced, the heat loss of the rotary kiln can be reduced, and the like.

Description

technical field [0001] The invention mainly relates to the field of rotary kilns, in particular to a furnace building method suitable for the inner lining of a rotary kiln cylinder. Background technique [0002] The rotary kiln originated from cement. In 1885, the British E Ransome invented the rotary kiln, which led to the rapid development of the cement industry and also promoted people's research on the application of the rotary kiln. Soon the rotary kiln was widely used in many industrial fields, such as in building materials, In many production industries such as metallurgy, chemical industry, environmental protection, etc., rotary kilns are widely used for mechanical, physical or chemical treatment of solid block (powder) materials, and play an increasingly important role in these productions. core equipment. [0003] A rotary kiln is generally composed of a kiln head box, a kiln tail box, a cylinder, a supporting device, a transmission device and other auxiliary devi...

AI Technical Summary

Problems solved by technology

The thickness of the inner lining of the rotary kiln is generally 200-220mm. The thermal conductivity of refractory bricks and castables is relatively large. In addition, the density of refractory bricks and castables is relatively high, and the refractory material of the cylinder body is heavy, which requires a large transmission power and increases the power consumption of the process.

[0006] (2) In the production of refractory bricks, the size of each brick cannot be without deviation. If the rotary kiln is built with refractory bricks, there must be brick joints in the inner lining of the cylinder. These brick joints will increase the energy consumption of the process

[0007] (3) During long-term operation, the cylinder body and refractory bricks may be deformed at high temperature, which will cause the refractory bricks to fall off, make the high-temperature gas (material) directly contact the steel plate of the cylinder body, and cause red kiln phenomenon, which not only seriously affects the service life of the cylinder body , also greatly increase the energy consumption of the process

[0008] (4) During the rotation of the rotary kiln, due to the influence of centrifugal force and inertial force, the refractory bricks cause rolling impact damage to the heat insulation board below it, causing the heat insulation fiberboard to be easily crushed and damaged, losing its heat insulation effect, and causing refractory bricks to fall off

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