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The Soil and Stone Separation Equipment supplied by Qingzhou Mingxu Supply Chain is a dry and wet dual-purpose screening machine designed for the rapid separation of soil, clay, sand, and stones. It uses a roller disc screening structure, allowing it to process wet and sticky materials without water washing. The machine is intended for high-output, continuous operation and is commonly used in river sand grading, raw ore processing, weathered material treatment, construction waste recycling, and coal gangue handling.
The equipment is built as supporting machinery for sand and stone processing lines and mining projects. Its roller design helps reduce blockage compared with traditional vibrating screens, making it suitable for feed materials with high moisture or clay content.
| Item | Description |
|---|---|
| Screening Structure | Multi-roller with linked discs |
| Drive Type | Electric motor with reducer, chain transmission |
| Screening Method | Dry and wet dual-purpose, no water washing required |
| Applicable Materials | River sand, weathered rock, construction waste, coal gangue, soil-stone mixtures |
| Discharge Method | Fine material falls through disc gaps; oversized stones move forward to rear outlet |
| Customization | Roller quantity, disc gap, and roller speed adjustable based on output and particle size |
The Soil and Stone Separation Equipment is equipped with multiple linked rollers fitted with discs. The motor drives all rollers to rotate synchronously through a reducer. Mixed material is fed from the front inlet onto the roller screening area. Fine soil and silt drop through the gaps between discs, while larger stones and aggregates are pushed forward by the rotating discs and discharged from the rear outlet. The constant rotation of the discs breaks sticky wet clay, reducing the chance of blockage. This process enables continuous mud-stone separation without water washing.
Pre-operation inspection:
1. Check the frame, rollers, and discs for deformation, wear, or jammed debris.
2. Inspect the oil level of the motor and reducer, and adjust the tension of transmission chains.
3. Clear the machine and discharge area to avoid blockage from large hard stones.
4. Confirm wiring and safety covers are intact. Run a no-load test before feeding.
Feeding and screening operation:
1. Start the machine and let it idle for 2 minutes to check synchronous rotation of rollers.
2. Feed mixed material evenly; avoid dumping oversized stones all at once.
3. Observe the screening result and adjust feeding speed based on material humidity and mud content.
4. Reduce feeding volume if sticky material accumulates; the self-rotating discs will clear clay automatically.
Shutdown and daily maintenance:
1. Stop feeding first, then cut off power after all material inside is fully discharged.
2. Clean residual clay and gravel between discs to prevent jamming after drying.
3. Lubricate chains and bearings, and replace severely worn discs in a timely manner.
4. Cover the machine to protect it from rain and dust when not in use.
1. Anti-blockage capability. The synchronized rotating discs continuously break apart wet clay and silt, preventing the clogging that commonly affects vibrating screens when handling sticky materials.
2. High throughput and continuous operation. The integrated roller conveying and screening design allows even feeding and smooth discharge. It can run 24 hours a day for aggregate pre-processing.
3. Wear-resistant components and low maintenance. Thickened wear-resistant discs are used to withstand impact and abrasion. The simple structure makes inspection and replacement of bearings and chains straightforward.
4. Dry and wet dual-use, wide material compatibility. No water washing is needed. The machine handles weathered rock, river raw sand, construction waste, coal gangue, and mine mixtures, making it suitable for sand plants, solid waste recycling, and mining operations.
5. Adjustable structure. The number of rollers and disc gaps can be modified according to material particle size and production requirements, allowing the machine to fit into existing processing lines.
Water-free separation for wet and sticky feed. The Soil and Stone Separation Equipment is designed to handle high-moisture clay, mud, and cohesive materials without the addition of water. The rotating discs create a self-cleaning action that prevents material from building up on the screening surface. This dry separation process is particularly useful in areas where water resources are limited or where wet processing would create additional wastewater treatment requirements. In practice, materials with a moisture content high enough to blind conventional screens can still be processed, as the disc gaps remain open during rotation. For very sticky clay, the feeding speed can be reduced and the disc spacing slightly enlarged to maintain throughput.
Roller speed synchronization. All rollers are driven by a common reducer and chain transmission, ensuring synchronized rotation. The speed can be adjusted within a set range to match the feed material. For lightweight or dry material, a higher speed increases the tossing action and helps move material forward more quickly. For heavy or wet material, a lower speed provides longer contact time on the screening surface, allowing more fine particles to fall through. The speed setting is made during commissioning, and operators can note the best setting for each material type for future use.
Disc gap customization. The gap between adjacent discs determines the size of the material that will fall through. This gap is set during manufacturing based on the target separation size, but it is not a fixed single value across the whole deck. For some applications, the gap can be designed progressively—larger at the feed end and smaller at the discharge end—so that fine material is removed early and larger stones continue to the end. Disc diameter and shape can also be specified to improve material movement or to handle larger stone sizes. When an inquiry is received, the typical information requested includes the maximum feed size, the desired cut point, and the moisture condition of the feed. Based on this, a roller layout and disc specification are proposed and confirmed with the customer before production.
Applicable materials:
1. Mining materials: weathered rock, mountain topsoil, mixed raw ore, coal gangue.
2. Sand and gravel: river cobble, raw mountain sand, mud-containing stone, river mixed aggregate.
3. Solid waste: construction waste, demolition soil, broken stone muck.
4. Engineering soil: tunnel muck, foundation silt mixed with stones, backfill mixture.
Typical scenarios:
1. Aggregate plants: pre-screening raw material to separate soil and qualified stones for better finished sand quality.
2. Open-pit mines: removing surface covering soil in advance to reduce the workload of sand washing machines.
3. Construction waste recycling: separating muck from recyclable broken stone aggregate.
4. River dredging and sand mining: separating silt from cobbles to purify stone materials.
5. Coal processing: sorting soil and coal lumps to reduce impurity content.
6. Infrastructure earthwork: classifying tunnel and foundation muck mixed with stones.
The main structure and drive components are covered for 12 months or 1,000 working hours, whichever comes first. Wear parts such as discs and chains are not included in the warranty. Replacement parts can be supplied; freight and installation labor are the customer's responsibility.
Q1: Can the machine really handle very wet and sticky clay without water washing?
A1: Yes. The rotating discs continuously break the material apart and keep the screening surface open. For particularly sticky clay, reducing the feeding speed or slightly increasing the disc gap during the design stage helps maintain steady throughput. However, for extremely liquid slurry, a pre-dewatering step is still recommended.
Q2: Can the disc gap be adjusted after the machine is installed?
A2: The disc gap is set during manufacturing based on the required separation size and is not designed for on-site adjustment during operation. If different cut points are needed later, the disc sets or roller assemblies can be replaced. It is therefore important to confirm the target particle size before production.
Q3: What are the main wear parts and how often do they need replacement?
A3: The main wear parts are the discs and drive chains. Replacement frequency depends on the abrasiveness of the feed material. Under normal conditions with river sand or construction waste, discs can last several months to over a year. Weekly inspection is recommended, and spare discs should be kept on site for continuous operations.
Q4: Does the machine require a water supply or washing system?
A4: No. The separator works without water, which makes it suitable for areas with limited water resources or for dry processing lines. It separates fine soil from stone using mechanical action only.
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West end of Yadong Street, Qingzhou Economic Development Zone, China
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