Construction method for laying refractory bricks of rotary kiln through bricklaying supporting device

Abstract

The invention belongs to the technical field of laying methods for refractory bricks of rotary kilns, and particularly discloses a construction method for laying refractory bricks of a rotary kiln through a bricklaying supporting device. The construction method comprises the following construction steps that S1, the construction portion of the inner wall of a kiln shell of the rotary kiln is cleaned; S2, a plurality of longitudinal straight lines and circumferential lines are drawn on the inner wall of the kiln shell of the rotary kiln; S3, the bottoms of the refractory bricks are laid, namely the lower semicircles are laid; S4, the bricklaying supporting device is mounted; S5, the tops, namely the upper semicircles, of the refractory bricks are laid; S6, opening sealing and seam sealing work is prepared; S7, after sealing is completed, a lead screw is tightened, and the bricklaying supporting device is contracted, so that brickwork of the circle is made to automatically draw close to the center of the circular ring in a centralized mode; S8, seams in the brickwork and the inner wall of a cylinder are checked; S9, after the refractory bricks of the first circle are laid, the lead screw is tightened, and the bricklaying supporting device is contracted for withdrawing from the first circle; and S10, the steps from the step S3 to the step S9 are repeated for laying of the next circle. By the adoption of the construction method, quality accidents, such as falling and breaking of the refractory bricks, frequently occur during operation of the rotary kiln are avoided to a great extent.

Description

technical field [0001] The invention belongs to the technical field of masonry methods for refractory bricks of a rotary kiln, and in particular relates to a construction method for building refractory bricks of a rotary kiln by using a brick supporter. Background technique [0002] The commonly used masonry methods for rotary kiln refractory bricks generally include traditional kiln support masonry and bricklaying machine masonry. At present, the traditional kiln bracing method is generally used in China. The structure of the bricklaying machine itself is relatively complicated, the investment is relatively large, and its use is limited to a certain extent. It is mostly used in the masonry of large kiln diameters. [0003] Whether it is traditional kiln braced masonry or bricklayer masonry, these two construction methods have their own advantages and disadvantages. Kiln braced masonry is the easiest choice for small diameter kilns or partial refractory brick dismantling an...

AI Technical Summary

Problems solved by technology

Kiln braced masonry is the easiest choice for small diameter kilns or partial refractory brick dismantling and maintenance, but kiln braced masonry involves more construction workers and a longer construction period, and the quality of masonry is easily affected by the construction environment and many artificial The influence of factors deviates from the construction specification, and the specific defects are as follows: 1. Use mud masonry, and the consistency of the mud is adjusted on site. The setting speed or dehydration speed is affected by the temperature during construction, and the uniformity of mud smearing during masonry is poor. Both will affect the quality of the masonry and fail to achieve the preset effect. In addition, in order to ensure the size of the mortar joints during the masonry, the bricks must be knocked one by one, which will damage the refractory brick itself. Good refractory bricks are shifted and loosened, thus burying hidden dangers for the subsequent use of masonry; 2. Due to the lack of predictability of artificial masonry, it will cause a large deviation between the size of the masonry and the design, so the construction site will Excessive processing of bricks occurs, and both thickness and length need to be processed. If the original bricks are processed so frequently, especially when the length of the processed bricks is less than 60% of the length of the original bricks, a ring of processed bricks is built separately. In the rotary kiln During the follow-up operation, the probability of masonry distortion and brick falling is very high, which will lead to frequent kiln maintenance, which will not only damage the reputation of refractory brick manufacturers and construction units, but also increase their later repair and maintenance costs. What is more serious is Affect the economic benefits of the user unit; 3. Many factors of artificial masonry will often lead to deviation from construction specifications and excessive use of locking iron plates when locking seams. To trace the quality accidents caused by refractory brick masonry in rotary kilns, Among them, there are often cases where the refractory bricks are loosened or even dropped during the operation of the rotary kiln due to the excessive use of locking irons during locking seams, or the situation that the locking irons are not tight.

The bricklaying machine does not need mud and does not need to turn the kiln. The construction speed is fast, but there are also defects. The specific performance is as follows: 1. The bricklaying machine has a large investment and a relatively complicated structure. It is not easy to install and operate, and it needs training to work. The operation and use are subject to certain restrictions; 2. The masonry above the centerline of the rotary kiln is prone to voiding when using a bricklaying machine. This is because the refractory bricks below the centerline of the masonry will be close to the kiln due to their own weight. The inner wall of the kiln, and the refractory brick above the center line cannot be close to the inner wall of the kiln due to its own weight, and there is a slight hollow phenomenon; the ring tightness work done in the actual work is only for the top brick lock area. At this time, even if the iron plate is repaired, the refractory bricks cannot be attached to the inner wall of the kiln, and the refractory bricks are still in a loose state; in actual operation, the pressure of the bricklaying machine is not easy to control, which also leads to the refractory bricks on the top and the inner wall of the cylinder. The important reason for the loose sticking; no matter how experienced the technician is, the above conditions will not be seen when laying bricks, and when the rotary kiln is running, there will be a relative slippage, which will cause the refractory bricks to loosen and fall off. Bricks fall frequently; 3. When using a bricklaying machine to fasten refractory bricks to repair iron plates, it often happens that the fastening is too serious and the refractory bricks break, which often occurs when using screw screws to lay bricks. question

[0004] The defects of the above two masonry methods lead to quality accidents prone to occur in the subsequent operation of the rotary kiln, and the kiln is shut down for maintenance frequently, which seriously affects the reputation of the construction unit in the industry and the economic benefits of the user unit

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