Deister News

The Deister "88" Diagonal-Deck Coal Washing Table

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The Deister "88" Table is a robust coal cleaning system designed for maximum efficiency and dependable performance. Using only water for separation, the table effectively cleans both bituminous and anthracite coals while achieving organic cleaning efficiencies up to 99.7%.

Performance Capabilities

The table efficiently processes:

  • Material down to 100 mesh and finer
  • Pyritic sulfur to 270 mesh for 3/8" or 1/4" feed sizes
  • Pyritic sulfur to 200 mesh for 3/4" or 1/2" feed sizes
  • Size ratios up to 65:1 on 3/8" x 100 mesh material

Capacity Specifications

Processing capacity depends on: feed size, reject percentage, and material washability.

For bituminous coal processing:

  • 3/8" x 0 or 1/4" x 0 (deslimed fractions): 25 TPH total for double-deck table (12.5 TPH per deck)
  • 3/4" or 1/2" steam fuel sizes: 30 TPH for twin-deck table

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Suspension System

The seven-wire rope suspension includes:

  • Five 1/2" diameter main support ropes
  • Two 3/8" control ropes at feed and middling corners
  • Built-in differential motion mechanism to minimize structural impact

Deck Construction

The deck features:

  • Cedar/redwood substructure and flooring
  • Durable polyurethane cover with molded-in riffles
  • 7+ years cover life expectancy
  • Smooth surface design for optimal fine particle separation
  • Deep channel and I-beam steel subframe

Adjustment System

Precise control through:

  • Simple turnbuckle adjustment for longitudinal inclination
  • Ball-and-socket joints for deck positioning
  • Independent lateral and longitudinal adjustments

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Water Efficiency

The table operates with a 2:1 water-to-solids ratio, compared to 8:1 ratios in alternative processes. This reduced water usage significantly lowers pumping and clarification costs.

Efficient Operation

  • Low power usage: under 3 hp
  • Minimal maintenance with heavy-duty components
  • Stable operation without constant adjustments
  • Single operator can manage multiple units

Parts Availability

  • Replacement parts available for "88" tables, regardless of unit age
  • We offer comprehensive technical and service support 

Product Quality

The table's gentle material flow preserves product value by preventing unwanted fines. It achieves 98% minimum organic cleaning efficiency when the feed contains no more than 10% material in the ±0.10 specific gravity range, with many installations exceeding 99% efficiency.

Conclusion

The Deister "88" Table offers efficient coal cleaning across a wide range of applications. Its combination of high cleaning efficiency, operational simplicity, and robust design makes it an effective solution for coal processing needs.