Partial Repair Method of Rotary Kiln Lining

A technology of rotary kiln and kiln lining, which is applied in the direction of lining repair, furnace, lighting and heating equipment, etc. It can solve the problems of short service life, refractory brick falling off, high working hours, etc., achieve rapid and effective repair, prolong service life and save time and cost effects

Active Publication Date: 2018-09-11
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the operation of the rotary kiln, especially the large-scale rotary kiln, the lining of the circular masonry refractory brick is washed by the flowing high-temperature solid material, resulting in damage to the surface of the refractory brick or partial loosening and falling off. It will affect the operation of the entire rotary kiln and aggravate the shedding of surrounding refractory bricks, deteriorating the operating environment
[0003] The overall masonry of the rotary kiln lining requires high man-hours and high investment, which is not conducive to the needs of industrial production. Partial repairs mainly follow the traditional method of using refractory bricks to re-build the damaged parts
Due to the long-term use of the rotary kiln, the overall kiln lining has been deformed, and the newly built refractory bricks in the repair area cannot completely match the undamaged kiln lining; the traditional partial repair method has a short service life after repair, and will cause a large area of ​​​​refractory fire around when it falls off again. The bricks fall off, seriously affecting the service life of the rotary kiln

Method used

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  • Partial Repair Method of Rotary Kiln Lining
  • Partial Repair Method of Rotary Kiln Lining
  • Partial Repair Method of Rotary Kiln Lining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: The partial repair method of the kiln lining of this rotary kiln adopts the following specific process.

[0027] The above process is adopted, wherein: the mixing ratio of dry material and water in the pouring material is 100:6 mass ratio, and the mixing time is 15 minutes; after standing for 2.5 hours, clean water is used for health preservation, and then water is used for health preservation again every 4 hours, and the health preservation is performed twice in total. After the repair is completed, the use effect is good, and the service life of the rotary kiln is extended by 8 to 12 months.

Embodiment 2

[0028] Embodiment 2: The partial repair method of the kiln lining of this rotary kiln adopts the following specific process.

[0029] The above process is adopted, wherein: the mixing ratio of dry material and water in the pouring material is 100:5 by mass, and the mixing time is 10 minutes; after standing for 2 hours, clean water is used for health preservation, and then water is used for health preservation again every 5 hours, for a total of 2 times of health preservation. After the repair is completed, the service life of the rotary kiln is extended by 4 to 6 months.

Embodiment 3

[0030] Embodiment 3: The partial repair method of the kiln lining of this rotary kiln adopts the following specific process.

[0031] The above process is adopted, wherein: the mixing ratio of dry material and water in the pouring material is 100:7 mass ratio, and the mixing time is 20 minutes; after standing for 4 hours, clean water is used for health preservation, and then water is used for health preservation again every 3 hours, and a total of 3 times of health preservation. After the repair is completed, the service life of the rotary kiln will be extended by 6 to 8 months.

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PUM

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Abstract

The invention discloses a sectional repair method for a kiln lining of a rotary kiln. The method includes the steps that (1) the kiln wall in a kiln lining damage area is cleaned; (2) Z-shaped pull rivets are fixed on the periphery of the kiln wall in the kiln lining damage area so as to fasten refractory bricks on the periphery of the kiln lining damage area, and gamma-shaped pull rivets and bolts are fixed to the kiln wall in the kiln lining damage area so as to anchor filling poured materials; (3) the poured materials are used for conducting pouring repair on the kiln lining damage area, and clear water curing is carried out after standing; and (4) after curing is completed, the kiln lining damage area is covered with a high-temperature-resistant steel plate which is fastened by bolts. By means of the method, the damaged kiln lining can be rapidly and effectively repaired, time is effectively shortened, the cost is effectively reduced, continuous falling of the refractory bricks in the kiln is effectively controlled, and the service life of the large rotary kiln is prolonged.

Description

technical field [0001] The invention relates to a method for repairing a kiln, in particular to a method for partially repairing the kiln lining of a rotary kiln. Background technique [0002] During the operation of the rotary kiln, especially the large-scale rotary kiln, the lining of the circular masonry refractory brick is washed by the flowing high-temperature solid material, resulting in damage to the surface of the refractory brick or partial loosening and falling off. It affects the operation of the entire rotary kiln and will aggravate the shedding of surrounding refractory bricks, deteriorating the operating environment. [0003] The overall masonry of the rotary kiln lining requires high man-hours and high investment, which is not conducive to the needs of industrial production. Partial repairs mainly follow the traditional method of using refractory bricks to re-build the damaged parts. Due to the long-term use of the rotary kiln, the overall kiln lining has bee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D1/16
CPCF27D1/16F27D2001/1605
Inventor 韩冰豆长宏万贺利梁婧宇佟玉磊管春红
Owner HEBEI IRON AND STEEL
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