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A kind of repair method of roasting furnace

A repair method and technology of roasting furnace, applied in the direction of lining repair and gas emission reduction, etc., can solve the problems of time-consuming, labor-intensive, poor integrity, protrusions falling off, and short use time, so as to improve the appearance qualification rate and reduce safety risks. , the effect of reducing repair costs

Active Publication Date: 2020-06-23
安阳市上鑫炉业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The removal of the flue wall is time-consuming, labor-intensive, and poor in integrity, which increases the production cost of the roasted block. After construction, due to the insufficient adhesion of the materials at the interface between the new and the old, after one cycle of operation, due to the high temperature environment in the furnace chamber The refractory brick lining surface and the cement layer will crack, protrude and fall off, which will not only affect the production efficiency of the furnace, but also affect the service life of the furnace, and cannot fundamentally achieve the purpose of repair
The cracks in the furnace chamber are plugged and smoothed, and the efficiency of putting into operation is low. When entering the next cycle, it has to be repaired again. The use time is short, which greatly increases the labor intensity of the workers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A method for repairing a baking furnace, the specific steps are as follows:

[0040] (1) Pretreatment: Clean the surface of the roasting furnace with a high-pressure water gun, and remove the hidden and weak coating on the surface of the roasting furnace, so as to avoid the hidden and weak coating that is short-lived after repair because it cannot be found in time. Shedding and damage occur again within a short period of time, and the firm coating remains; the pressure of the high-pressure water gun is 70Mpa; the high-pressure water gun sprays silica sol;

[0041] (2) The first spraying repair: Spray the first layer of spraying paint on the surface of the pretreated roasting furnace with a jet machine. The thickness of the first layer of spraying paint is 0.2mm, and the particle size of the first layer of spraying paint is submicron. ;

[0042] (3) When the first layer of spray paint is viscous, spray a layer of glass fiber or carbon fiber on the first layer of spray p...

Embodiment 2

[0049] A method for repairing a baking furnace, the specific steps are as follows:

[0050] (1) Pretreatment: Clean the surface of the roasting furnace with a high-pressure water gun, and remove the hidden and weak coating on the surface of the roasting furnace, so as to avoid the hidden and weak coating that is short-lived after repair because it cannot be found in time. The shedding and damage will occur again within a short period of time, and the firm coating will remain; the pressure of the high-pressure water gun is 72Mpa; the spray of the high-pressure water gun is silica sol;

[0051] (2) The first spraying repair: Spray the first layer of spraying paint on the surface of the pretreated roasting furnace with a jet machine. The thickness of the first layer of spraying paint is 0.25mm, and the particle size of the first layer of spraying paint is submicron. ;

[0052] (3) When the first layer of spray paint is viscous, spray a layer of glass fiber or carbon fiber on the...

Embodiment 3

[0059] A method for repairing a baking furnace, the specific steps are as follows:

[0060] (1) Pretreatment: Clean the surface of the roasting furnace with a high-pressure water gun, and remove the hidden and weak coating on the surface of the roasting furnace, so as to avoid the hidden and weak coating that is short-lived after repair because it cannot be found in time. The shedding and damage will occur again within a short period of time, and the firm coating will remain; the pressure of the high-pressure water gun is 75Mpa; the spray of the high-pressure water gun is silica sol;

[0061] (2) The first spraying repair: Spray the first layer of spraying paint on the surface of the pretreated roasting furnace with a jet machine. The thickness of the first layer of spraying paint is 0.3mm, and the particle size of the first layer of spraying paint is submicron. ;

[0062] (3) When the first layer of spray paint is viscous, spray a layer of glass fiber or carbon fiber on the ...

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Abstract

The invention discloses a roaster repairing method. The roaster repairing method specifically comprises the following steps that a high-pressure water gun is used for cleaning the surface of a roaster, a hidden and infirm coating on the surface of the roaster is removed, and a firm coating is reserved; silica sol is sprayed through the high-pressure water gun; a spraying machine is used for spraying a first layer of spraying materials on the pretreated roaster surface; when the first layer of spraying materials are thick, a layer of glass fiber or carbon fiber is sprayed to the first layer ofspraying materials; after the first layer of spraying materials are dried, the spraying machine is used for spraying a second layer of spraying materials; and after the second layer of spraying materials are dried, if fine cracks are generated, the spraying machine is used for spraying the first layer of spraying materials, and slight cracks are filled. Through successful application of the disclosed roaster repairing method, safety risks caused by fire path blockage during roasting are effectively reduced, the labor intensity of personnel is effectively reduced, generation of roasting waste blocks can be reduced as well, the natural gas consumption rate during roasting is reduced, and the effect is obvious in the aspects of energy saving and consumption reducing.

Description

technical field [0001] The invention belongs to the technical field of chemical smelting, and in particular relates to a method for repairing a roasting furnace. Background technique [0002] The fourth-phase roaster of Chinalco Qinghai Branch has been operating at full capacity for five years since it was put into operation for technical renovation and overhaul in 2013. The long-term operation loss of the roasting furnace has caused cracks and deformation of the refractory bricks in the furnace chamber. At present, most furnace chamber material boxes have material leakage, and the maximum cracking distance of the vertical joints of the flue wall reaches 20 mm, resulting in an increase in the air leakage rate of the furnace chamber. , which not only makes the negative pressure leakage of the system serious, which has a certain impact on the temperature rise, but also significantly increases the consumption of natural gas, and greatly increases the loss of carbon block fillin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D1/16C04B35/103C04B35/80C04B35/82
CPCY02P10/143
Inventor 尚利平
Owner 安阳市上鑫炉业有限公司
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