Rotary kiln

Abstract

The present invention provides one kind of rotary kiln with short lining producing period, simple production process, easy construction and maintenance, long service life and high heat efficiency. The rotary kiln includes a cylinder, a heat isolating layer and a furnace lining. The furnace lining consists of refractory bricks fixed with anchoring parts onto the cylinder, and the anchoring part has two hooks inserted into the holes in the refractory bricks in one end and the other end welded to the cylinder. The seams between refractory bricks are sealed with deposited material or interface bricks.

Description

technical field [0001] The invention belongs to a rotary kiln, specifically relates to the improvement of the furnace lining structure thereof, and is mainly applicable to roasting equipment such as metallurgy, chemical industry and building materials. Background technique [0002] There are basically two commonly used methods for building the inner lining of the existing rotary kiln. One is to use refractory bricks to build with staggered joints or circular joints. This method has the following disadvantages: 1) the wedge-shaped brick has a small size and head width difference, and the brick-to-brick combination is poor, and the brick is easy to fall off; 2) the masonry has strict requirements on the tolerance of the shape and size of the brick; 3) the construction is difficult with small brick joints, and the construction period Long; 4) With the prolongation of the running time, the wear of bricks reaches a certain level, and accidents of falling bricks and subsidence are...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: 1) the wedge-shaped brick has a small size and head width difference, and the brick-to-brick combination is poor, and the brick is easy to fall off; 2) the masonry has strict requirements on the tolerance of the shape and size of the brick; 3) the construction is difficult with small brick joints, and the construction period Long; 4) With the extension of the running time, the wear of the bricks reaches a certain level, and it is easy to cause brick falling and collapse accidents

This method also has the following disadvantages: 1) The prefabricated anchor brick is welded together with the kiln shell by the outer part of the inner reinforcement. Large, the temperature of the cylinder increases and the heat dissipation loss is large

2) The thermal expansion of the internal reinforcement in the prefabricated anchor brick is inconsistent with the expansion coefficient of the refractory material, and the expansion of the reinforcement will cause damage to the prefabricated block and affect the life of the prefabricated block; 3) The production cycle is long, the production process is relatively complicated, and the production cost is high

In the rotary kiln disclosed in this patent document 1, "one end of the anchor is provided with a hook", therefore, the number of anchors required to fix the prefabricated block is large, the material consumption is large, the welding cost of the anchor is high, and the construction is complicated

In addition, the rotary kiln disclosed in this patent document is composed of prefabricated blocks fixed by anchors within a circle. This structure will make it very difficult to weld the anchors when installing the last prefabricated block, and requires kiln straightness and prefabricated block accuracy. , Prefabricated block circumferential spacing accuracy is very high, the construction is difficult, and for rotary kilns with unequal diameters, this structure cannot be applied

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