11 Types of Faults in Sand Washing Machines and Solutions

The sand washing machine is a piece of equipment designed for washing both artificial and natural sand. It is widely applied in the stone material washing processes across industries such as sand and gravel plants, building materials, chemicals, highways, railways, water conservancy, and hydropower. By removing surface impurities from sand and stones, it disrupts the moisture film surrounding sand grains to achieve effective dehydration, thereby ensuring high-efficiency sand cleaning.

During operation, issues such as inadequate washing or reduced throughput may occur. This article outlines common problems encountered when using sand washers along with their corresponding solutions.

Ineffective Sand Washing

Solution

When washing sand, first activate the flushing pipe before feeding in the sand. Ensure the water flow rate is moderate to maintain effective cleaning and prevent sand from overflowing with the discharge slot. Feed the material uniformly; avoid excessive volume or rapid feeding, as these factors can compromise sand quality.

Reduced Sand Washing Capacity

Cause

1. The screen mesh is damaged.

2. The fixing bolts of the screen mesh have loosened or fallen off.

Solution

1. Inspect, repair, or replace the screen mesh.

2. Tighten the bolts.

Excessive Bearing Temperature

Cause

1. Contaminated grease.

2. Improper amount of grease.

3. Damaged bearing.

Solution

1. Replace the grease.

2. Ensure the grease quantity is appropriate—neither too much nor too little.

3. Replace the bearing.

Discharge Port Blockage

Cause

This is the most common issue encountered during sand washer operation. It is primarily caused by excessively fine grain sizes in the slurry or a sudden increase in feed volume, leading to material accumulation at the discharge port.

Solution

Immediately stop feeding. Open all discharge ports to prevent sedimentation. Finally, flush the sand washer with clean water before resuming operations.

Excessive Noise from Sand Washing Machine

Cause

1. Damaged bearings.

2. Faulty reducer.

3. Bucket body rubbing against the shell.

Solution

1. Replace the bearings.

2. Overhaul the reducer.

3. Inspect and adjust the wheel bucket body.

Frequent Gear Damage

Cause

1. Lack of timely maintenance.

2. The shaft of the sand washer and the low-speed shaft of the reducer do not meet the required parallelism tolerance.

Solution

1. Lubricate according to the specified schedule.

2. Adjust the gears to ensure they meet the required specifications.

Bearing Damage Risks

Cause

1. Interruption of oil supply or damage to the sealing ring.

2. Prolonged lack of maintenance and cleaning.

Solution

1. Replenish lubricant or replace the sealing ring as needed.

2. Perform regular inspections and cleaning.

Consistent maintenance and servicing significantly reduce the failure rate of sand washing machines, ensuring stable equipment operation and extending its service life.