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A method for relining of rotary kiln

A technology of rotary kiln and lining, which is applied in the direction of rotary drum furnace, lining repair, furnace, etc., can solve the problems of long maintenance time and affect normal production, and achieve the effect of low cost, shortened maintenance time and simple method.

Active Publication Date: 2016-11-30
SHIJIAZHUANG XINHUA IND FURNACE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, my country's rotary kiln repairing technology is still at a relatively primitive stage. For lime calcining rotary kilns, if the inner lining is partially damaged, the kiln needs to be stopped for repairing. The maintenance time is long and affects normal production. For cement rotary kilns The kiln, through the technology of spraying water on the kiln wall to make some cement clinker hang on the kiln wall, plays a repairing role, but this method cannot fundamentally solve the problem

Method used

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  • A method for relining of rotary kiln
  • A method for relining of rotary kiln
  • A method for relining of rotary kiln

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Experimental program
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Effect test

Embodiment 1

[0021] The method for repairing the inner lining of the rotary kiln of the present invention, the rotary kiln is as figure 1 Shown is composed of a furnace wall and a lining 2, the center of the lining is the kiln chamber 3, and the steps of filling the lining are as follows:

[0022] (1) Use an infrared camera to detect the damage of the inner lining of the rotary kiln 1, and determine the damaged area and degree of damage of the damaged part 4 of the inner lining;

[0023] ⑵Prepare the raw material limestone and equipment 8 for repairing the furnace, connect the raw material equipment for repairing the furnace with the fuel system 6 of the rotary kiln, and connect the fuel system to the burner; add the repairing additive to the raw material for repairing the furnace, which is a water reducer , so that the liquid ash can be in good contact with the damaged surface of the inner lining and blend into one;

[0024] (3) Add furnace repair raw materials to the fuel system through...

Embodiment 2

[0029] Another embodiment of the present invention is as figure 2 As shown, the rotary kiln is a rotary kiln with a partition wall, and the raw material for repairing the furnace is a mixture of silica or alumina powder, and the mass ratio of the two is 1:1. The lining of the kiln body is a hollow structure composed of a refractory inner cylinder made of refractory materials and a refractory outer cylinder made of refractory materials. The center of the refractory inner cylinder is the kiln chamber. It is a material channel, and the material channel is provided with refractory supports.

[0030] The rotary kiln is equipped with conveying and spraying equipment 9, and two repairing guns 7 are respectively inserted into the rotary kiln or both ends thereof, and the material of the repairing guns is ceramics. The furnace repair raw material equipment is connected with the conveying and spraying equipment, and the conveying and spraying equipment is connected with the furnace re...

Embodiment 3

[0032] Another embodiment of the present invention is as image 3 As shown, the DC arc calcium carbide furnace includes a furnace cover, a furnace shell and a furnace bottom. A hollow electrode 14 is inserted on the furnace cover, and a furnace bottom electrode 11 is inserted at the bottom. The calcium carbide furnace is provided with conveying and spraying equipment 9 and a repairing gun 7, and the repairing gun is a steel repairing gun with a cooling chamber 12. The furnace repairing gun 7 is inserted and passed through the hollow electrode, and the furnace repairing gun protruding from the electrode part 13 can turn the direction. The end of the repairing gun is provided with a plasma burner for heating the raw materials for repairing the furnace. The furnace repair raw material equipment is connected with the conveying and spraying equipment, the conveying and spraying equipment is connected with the furnace repairing gun, and the furnace repairing gun is inserted into th...

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Abstract

The invention relates to a method for repairing a lining of a rotary kiln. The method includes the steps that (1) the damage condition of the lining of the rotary kiln is detected, and the damage area and damage degree of the damaged part of the lining are determined; (2) fettling raw materials and fettling raw material equipment are prepared, and the fettling raw material equipment is connected with a combustor or a fuel system of the rotary kiln; (3) the fettling raw materials are blended in the fuel system or the combustor so that liquid ash or semi-melt ash generated after fuel combustion can have fettling properties and structures; (4) the liquid ash enters a hearth of the rotary kiln as fuel is combusted, flows at the bottom of the hearth from one end to the other end, and automatically fills the damaged part of the lining as the rotary kiln rotates; (5) through artificial or natural cooling, the temperature of the damaged part of the lining is lower than the temperatures of the other parts of the lining, so that the liquid ash solidifies at the damaged part of the lining. According to the method, hot repairing is conducted on the lining of the rotary kiln online, production is not influenced, the non-planed kiln stop frequency is lowered, and reduction of production cost is facilitated.

Description

technical field [0001] The invention belongs to the technical field of heating equipment and industrial kilns, and relates to a method for lining a rotary kiln. Background technique [0002] The rotary kiln is a calcination equipment for continuous high-temperature production. It consists of a furnace wall and an inner lining. The inner lining is made of refractory materials. Since the lining of the rotary kiln rotates continuously with the kiln body, and is affected by high temperature, material impact, and rotational stress, it is easier to damage the lining refractories than other kiln types. How to make the rotary kiln run for a long time and efficiently, The lining of the rotary kiln plays an important role, so it is also a topic of concern to the calcination engineers and technicians. At present, my country's rotary kiln repairing technology is still at a relatively primitive stage. For lime calcining rotary kilns, if the inner lining is partially damaged, the kiln ne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27B7/28F27D1/16
Inventor 贾会平
Owner SHIJIAZHUANG XINHUA IND FURNACE CO LTD
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