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Spray repair method for lining of kiln firebrick

A refractory brick lining and repair method technology, applied in the direction of lining repair, etc., can solve the problems of repair, time-consuming, falling off, etc., achieve the effect of simple and effective procedures, ensure normal operation, and prolong service life

Active Publication Date: 2010-03-03
甘肃中顺石化工程装备有限公司
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  • Application Information

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Problems solved by technology

[0002] At present, in the repair technology of refractory brick linings of roasting furnaces, sulfur furnaces and waste heat boilers in the chemical industry, smelting and other industries, most of them are repaired by manual smearing. The construction operation is time-consuming, labor-intensive, difficult and expensive. Moreover, due to insufficient strength after application, it is easy to crack and fall off in the future use process, and cannot fundamentally achieve the purpose of repair
[0003] After the refractory brick lining in the kiln has been driven for a period of time, due to the high temperature environment in the furnace, the harmful impurities contained in the ore and the erosion of the ore, cracks will appear on the surface of the refractory brick lining and the cement layer. Phenomena such as falling off will not only affect the production efficiency of the furnace, but also affect the service life of the furnace

Method used

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  • Spray repair method for lining of kiln firebrick
  • Spray repair method for lining of kiln firebrick
  • Spray repair method for lining of kiln firebrick

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specific example

[0024] Specific example: Diameter φ = 10500mm, height H = 16000mm, bottom area 600m 2 , the temperature at the bottom is 600°C, and the temperature at the outlet of the flue gas is 900°C.

[0025] The internal structure of the equipment is three layers, the first layer is refractory bricks, built with mud, the second layer is insulation bricks, and the third layer is steel shell. At present, the steel shell of the furnace body is red and deformed, and the refractory brick lining has cracks and some parts fall off. The area to be repaired is 400m 2 about.

[0026] Due to the shedding phenomenon of the refractory brick (high alumina brick) lining of the roasting furnace, it is analyzed that the iron, aluminum, silicon, oxygen and other substances contained in the high alumina brick and masonry mortar are related to the sulfur, copper, lead, and other substances contained in the ore. The result of chemical reactions of zinc, molybdenum, gold, cobalt, molybdenum and other substa...

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Abstract

The invention mainly relates to a spray repair method for the lining of a kiln firebrick in smelting and chemical industries and the like, comprising technical processes such as scene pretreatment, spray repair, maintaining and scene heat treatment. Aiming at the damaged firebrick linings of inner walls of a roasting kiln, a sulfur kiln and a waste heat boiler in smelting and chemical industries and the like, powder-shaped high temperature fireproof material is sent to a spray pipe by directly utilizing an air compressor and an injector and then sprayed on the firebrick or a steel board needing repairing by high pressure after mixed with a certain proportion of water in a transfer piping. The method is a recovery repair technology, and is characterized in that thorough repair treatment canbe carried out on line as long as the spraying pipe can be stretched to the position needing repairing in the premise of no need for removing or bricking again; and the method has simple and effective procedure, short construction time and low repair cost, thereby effectively repairing the firebrick lining dropping from the inner part of the kiln, prolonging the service life of the kiln and guaranteeing long-term normal operation of equipment.

Description

Technical field: [0001] The invention mainly relates to the technical field of refractory brick lining spray repairing in smelting, chemical industry and other industries, and particularly relates to a method for spraying refractory brick lining of kilns. Background technique: [0002] At present, in the repair technology of refractory brick linings of roasting furnaces, sulfur furnaces and waste heat boilers in the chemical industry, smelting and other industries, most of them are repaired by manual smearing. The construction operation is time-consuming, labor-intensive, difficult and expensive. Moreover, due to insufficient strength after application, it is very easy to crack and fall off in the future use process, and the purpose of repair cannot be fundamentally achieved. [0003] After the refractory brick lining in the kiln has been driven for a period of time, due to the high temperature environment in the furnace, the harmful impurities contained in the ore and the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D1/16C04B35/66C04B35/10
Inventor 过卫东张荣泽
Owner 甘肃中顺石化工程装备有限公司
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