How to Solve the Rust Problem of Sand Washing Machines

Daily maintenance of sand washer equipment is critical, encompassing but not limited to the upkeep of key components. Proper lubrication is particularly vital for sand washing machines. Neglecting maintenance over extended periods can lead to rust formation and hinder smooth operation. In severe cases, this may result in mechanical failures, causing downtime and impacting production efficiency. Therefore, this section outlines the specific requirements for lubricants used in sand washing machine equipment.

1. Due to the small oil tank capacity of sand washing machines, the volume of lubricating oil that can be accommodated is relatively limited. Additionally, operating temperatures tend to rise during use, necessitating lubricants with excellent thermal stability and oxidation resistance. Given the harsh working environments typical for sand washer equipment—characterized by high levels of coal dust, rock dust, and moisture—the lubricating oil is inevitably exposed to contamination from these impurities. Consequently, the lubricant must demonstrate superior anti-rust, anti-corrosion, and demulsification properties.

2. For operating in open-pit mines, seasonal temperature fluctuations must be carefully monitored. In many regions, significant diurnal temperature variations also occur. Therefore, select lubricating oils with low viscosity-temperature sensitivity to ensure consistent performance. High temperatures can reduce oil viscosity excessively, preventing the formation of an adequate lubricating film and compromising protection. Conversely, low temperatures can increase viscosity too much, hindering startup and operational efficiency. Additionally, sustained high temperatures may pose fire or explosion risks for certain sand washing equipment. To mitigate this hazard, use flame-resistant lubricants rather than those with low flash points.

3. Lubricant compatibility with seals is essential to prevent seal degradation. Beyond ensuring proper lubrication for , selecting high-quality lubricants is critical. Poor-grade lubricating oil can significantly impair the normal operation and reliability of sand washing equipment.

Rust Removal Methods

Rust Removal Tip 1

High-pressure water rust removal involves spraying the equipment with high-pressure water. The advantages of this method include no dust pollution, minimal impact on sand washing equipment, and significantly improved rust removal efficiency. However, it is crucial to dry the treated areas promptly after rust removal and apply lubricating oil immediately to any parts requiring lubrication. Additionally, high-pressure water rust removal may adversely affect the surface paint of the equipment, potentially causing issues if low-quality paint is used.

Rust Removal Technique 2

This method utilizes compressed air for rust removal. By compressing the air and installing an appropriate rust removal device that reciprocates or rotates, it can meet various rust removal requirements. Using tools such as angle grinding wheels, wire brushes, pneumatic needle beams, or pneumatic hammers, this process effectively removes rust. Compared to manual methods, it significantly improves the rate of surface roughening for painting, achieving up to 1~2 m²/hour. However, it cannot remove oxide scale from the surface. This technique allows for smaller, high-quality, high-rate surface treatment and jetting. It is versatile and can be used in any position, making it widely adopted in repair processes.

The two techniques described above are primarily suitable for areas with extensive rust. For smaller rusted areas, manual rust removal is recommended. Tools such as hand hammers, scrapers, knives, steel wire brushes, or coarse emery cloth can effectively eliminate rust in these localized spots.