4 Layers Fiberglass Multi Decks Shaking Table

4-Layer Suspended Shaking Table

A 4-Layer Suspended Shaking Table, also known as a multi-deck shaking table, is a high-capacity, gravity separation device used in the mineral processing industry for separating fine-grained materials based on differences in their specific gravity (density). It is an evolution of the traditional single-deck shaking table, engineered for greater efficiency and space savings.

1. Core Working Principle

The fundamental principle is gravity concentration. The table exploits the difference in density, size, and shape of mineral particles. When a slurry (a mixture of crushed ore and water) is fed onto the table, the following forces act on the particles:

• Shaking Motion (Longitudinal): The deck undergoes a slow forward push and a rapid return, courtesy of a head mechanism. This jerking motion transports heavier, denser particles towards the end of the deck.

• Flowing Water (Transverse): A film of water flows across the deck from the feed side to the tailings side. This flow carries lighter, less dense particles laterally.

• Friction and Bed Stratification: The deck is covered with riffles (low grooves). The shaking motion causes particle stratification. Denser particles settle at the bottom of the riffles, while lighter particles remain on top and are washed away by the cross-flowing water.

As a result, particles are separated into a continuous spectrum, with the heaviest concentrates at one end, middlings in the center, and the lightest tailings at the other.

2. Key Components and Structural Design

• Deck Structure: The most distinctive feature is the stacking of four independent inclined decks in a single frame, one above the other. Each deck is a flat, rectangular surface, typically made from fiberglass or wood and covered with wear-resistant riffles.

• Suspension System: The entire frame holding the four decks is suspended from overhead supports by steel cables or rods. This "suspended" design allows for a free, floating motion that is efficient and requires less drive power. It also isolates vibration from the supporting structure.

• Drive Mechanism (Head Motion): A single, centrally located electric motor drives an eccentric crank or a more modern electromagnetic drive. This mechanism imparts the precise, asymmetrical reciprocating motion to the entire frame, moving all four decks simultaneously.

• Feed and Water Distribution System: A central distribution system splits the feed slurry evenly to all four decks. Similarly, water is distributed via adjustable launders to each deck to create the necessary cross-flow.

• Product Launders: Separate collection launders run along the sides and end of each deck to collect the various products: Concentrates (highest grade), Middlings (to be re-processed), and Tailings (waste).

3. Advantages of the 4-Layer Design

• High Capacity in Small Footprint: This is the primary advantage. By stacking four decks vertically, the processing capacity is nearly quadrupled compared to a single-deck table without occupying more floor space.

• Cost-Effectiveness: A single drive mechanism powers four separation units, reducing capital cost per unit of capacity, as well as energy and maintenance costs.

• Operational Efficiency: One operator can manage a battery of multi-deck tables more easily than an equivalent number of single-deck tables.

• Consistent Performance: Since all decks are moved by the same mechanism, they operate under identical motion dynamics, ensuring consistent separation performance across all layers.

• Reduced Plant Footprint: Ideal for mobile plants or facilities where space is a constraint.

4. Typical Applications

This equipment is highly effective for processing a wide range of fine-grained ores (typically below 2mm), including:

• Precious Metals: Recovery of fine gold, silver, and platinum group metals.

• Heavy Minerals: Concentration of tin (cassiterite), tungsten (wolframite, scheelite), tantalum, and coltan.

• Base Metals: Beneficiation of iron, chrome, and manganese.

• Industrial Minerals: Purification of zircon, rutile, and other sand minerals.

• Recycling: Recovering metals from electronic waste (e-waste) and industrial by-products.

5. Operational Considerations

• Feed Preparation: A consistent and well-classified feed is crucial. The presence of slimes (ultra-fine particles) or oversized material can severely reduce efficiency.

• Precise Control: Optimal performance requires careful adjustment of several parameters: feed rate, water wash, deck tilt, stroke length, and stroke frequency.

• Maintenance: While robust, the drive mechanism and suspension points require regular inspection. Ensuring that all four decks are level and parallel is critical.

In summary, the 4-Layer Suspended Shaking Table is a highly efficient and space-saving solution for gravity concentration. It represents a significant advancement over single-deck tables, offering high throughput, lower operating costs, and superior performance in recovering valuable fine-heavy minerals.

4-Layer Suspended Shaking Table Picture

4-Layer Suspended Shaking Table Technical Parameter