A must-read for Indonesian mining and aggregate producers – complete guide to tackling screening challenges with high-moisture materials
— Technical share by Henan Quanshun Vibration Co., Ltd.
The Asia-Pacific region is the core demand area for vibrating screens, accounting for over 48% of global demand in 2025. As one of the largest economies in Southeast Asia, Indonesia’s infrastructure construction is accelerating rapidly, directly driving the import demand for mining machinery and screening equipment.
However, Indonesia has a tropical rainforest climate with high temperatures and heavy rainfall throughout the year, and ambient humidity remains high. This climatic condition brings a tough challenge to vibrating screen operation – screen blinding (plugging).
When the moisture content of the material exceeds 5%, fine particles tend to adhere to the screen mesh, causing a sharp decline in screening efficiency. This is almost a daily “nightmare” at Indonesian mines, quarries, and aggregate production sites.
Before offering solutions, we must understand the root causes:
Cause 1: High material moisture
During transportation and stockpiling in Indonesia, materials are prone to getting wet, with moisture content often exceeding the normal handling capacity of vibrating screens. Moisture forms a liquid film on particle surfaces, greatly increasing adhesion between particles.
Cause 2: Uneven feeding
If the feeding device is poorly designed or improperly operated, material distribution on the screen surface becomes uneven, leading to accumulation in certain areas and worsening plugging.
Cause 3: Mismatched aperture size
If the screen opening is too large or too small relative to the particle size, materials may either fail to pass through smoothly or larger particles may become wedged in the openings.
Increasing excitation force and amplitude is one of the most direct and effective ways to handle moist materials. Greater excitation force can break the liquid film adhesion between particles, keeping the material bouncing actively on the screen surface and reducing adhesion opportunities.
Operation tip: Adjust the excitation force of the vibration motor according to changes in material moisture content. If the material is exceptionally wet, consider replacing with a high-frequency exciter to enhance self-cleaning of the screen deck through higher vibration frequency.
Properly adjusting screen tension is an effective way to reduce blinding. The specific approach is to use a constant-tension mechanism for the tensioning hooks – that is, adding springs to the tensioning bolts. This allows the screen mesh and support beams to produce a slight secondary vibration, effectively reducing plugging.
Why it works: The constant-tension mechanism automatically compensates for mesh slack caused by stress, keeping the screen in optimal tension at all times, making it harder for particles to get stuck in the openings.
When conditions permit, adding water to dilute the material can increase its fluidity and reduce adhesion.
Caution: This method is suitable only for downstream processes that are not sensitive to moisture. If the subsequent process has strict requirements on material moisture content (e.g., cement production), use this approach with care.
In moist material environments, keeping spare screens and replacing them regularly is the simplest and most practical management strategy. Daily maintenance should include:
Regularly washing the screen mesh with water to remove material residues
Using cleaning brushes to scrub and ensure screen openings are clear
Keeping a replacement log to track the service life of each screen
For the special working conditions in the Indonesian market, we recommend selecting screens with better anti-blinding performance at the time of purchase:
Choose self-cleaning screens (e.g., wave-shaped screens) that use their own vibration to discharge material automatically
For materials with high fines and clay content, select more wear-resistant screens with better-designed apertures
Beyond the above solutions, establishing a standardized daily maintenance routine is equally important. Here is our recommendation for on-site operators:
| Check Item | Frequency | Key Points |
|---|---|---|
| Screen cleanliness | Daily | Check for material residues, clean promptly |
| Lubrication status | Daily | Ensure sufficient grease in bearings |
| Abnormal noise | Daily | Listen for any unusual sounds during operation |
| Vibration symmetry | Daily | Observe if vibration is consistent on both sides |
| Structural cracks | Weekly | Inspect screen box, support beams for cracks |
Demand for vibrating screens in the Indonesian market is growing steadily, but screen blinding caused by humid climate is a challenge every equipment user must face. By properly adjusting vibration parameters, optimizing screen tensioning, and implementing routine maintenance, plugging can be effectively controlled and screening efficiency significantly improved.
If your vibrating screen is also suffering from moist material blinding, feel free to contact Henan Quanshun Vibration Co., Ltd. We can provide customized screening solutions tailored to the actual working conditions in the Indonesian market.
