Composite coating material for coal mine conveying pipeline, construction process and application

By using composite coating materials and low-temperature curing processes on coal mine pipelines, the problems of low-temperature freezing blockage and scaling have been solved, achieving a protective effect with high adhesion and low energy consumption, extending the service life of the pipeline and reducing construction costs.

CN122168117APending Publication Date: 2026-06-09XINJIANG TIANCHI ENERGY SOURCES CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XINJIANG TIANCHI ENERGY SOURCES CO LTD
Filing Date
2026-03-31
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Coal mine pipelines are prone to freezing and scaling on their inner walls in low-temperature environments. Existing protective measures, such as traditional coatings, are ineffective, electric heat tracing is energy-intensive, and regular cleaning is costly and incomplete.

Method used

The composite coating material, including epoxy resin, polytetrafluoroethylene, nano aluminum nitride and curing agent, is used to form a high-adhesion, thermally conductive coating through sandblasting, electrostatic spraying and low-temperature curing processes, which is suitable for on-site construction in coal mines.

Benefits of technology

It significantly improves the low-temperature antifreeze performance of pipelines, reduces the scaling rate, extends service life, simplifies construction procedures, reduces costs, and meets the needs of coal mine transportation pipelines in frigid regions.

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Abstract

This invention discloses a composite coating material, construction process, and application for coal mine transportation pipelines. The composite coating material, by mass fraction, comprises the following components: 30%-35% epoxy resin, 10%-15% polytetrafluoroethylene, 5%-8% nano-aluminum nitride, 8%-12% curing agent, 2%-4% coating additives, and the balance being solvent. This composite coating exhibits an adhesion strength ≥5 MPa, ensures no freezing or blockage of the pipeline under -30℃ low-temperature conditions, reduces scaling rate by more than 90% compared to ordinary pipelines, and extends pipeline service life by more than 3 times. It is suitable for on-site maintenance and construction of coal mine water-coal slurry transportation pipelines and mine water return pipelines in severely cold regions such as Northeast and Northwest China, possessing extremely high practical value and promising application prospects.
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