Cross Belt Sampling Systems
Multotec Process Equipment (Pty) Ltd has manufactured and supplied sampling equipment under license to Siebtechnik GmbH in Germany since 1987. Multotec is a leader in the design and supply of dry cross belt sampling installations in Africa. Our specialists have experience in all aspects of sampling and preparation over an extensive range of mineral applications. This enables the selection of the best and most cost effective sampling. We also provide cross-stream sampling solutions where recommended
Primary Cross Belt Samplers- To suit all conveyors from 450mm (18”) to 2400mm (95”) wide
- Can be installed on horizontal or inclined belts up to 18°
- Computer generated simulations and 3-D modelling of designs available
- Designed to suit various idler troughing angles of 20° to 45°
- Rubber or polyurethane skirting and curtains to contain agitated material
- Sampling is mass or time based
- Adapted to sample most conveyed mineral particles depending on amount of fines and moisture
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Reliable Cutter- Guaranteed unbiased increment using straight or angled cutters
- Slot width conforms to all ISO, ASTM and AS recommendations
- Nylon brush with polyurethane or staggered rubber scraper assembly for positive fines removal
- Durable stainless or Mn steel sample cutter scoop available
- Cutter speed exceeds belt speed up to 40% but limited to 6m/s tip speed
- “Correct sampler” designs adopted to comply with international norms
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Construction - Direct drive unit complete with geared brake motor up to 30kW
- Dedicated brake controller panel and adjustable timer for reliable operation
- Complete turnkey plant supplied where necessary
- Systems custom made to suit each application
- Manufactured in South Africa according to ISO 9001:2000 standards
| Retrofit - Easily – mounted on conveyor stringers along length of conveyor
- Installed and commissioned in a few hours
- Guaranteed not to damage the conveyor belt when correctly installed
- Trouble-free operation until 98 % availability
- Minimal plant modifications at low cost
- Shims / spacers used to ensure cutter ≤10mm from belt surface
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Sample Feeder ConveyorOur custom designed mini-conveyors provide a space efficient and cost effective way to enclose sampled material between unit sampling, crushing and division steps - Lightweight, rugged construction
- Custom design (300mm – 1050mm width and1500mm – 40 000mm
in length) - Fully guarded moving parts
- Scraper to clean belt discharge
- Ease of tensioning adjustment and maintenance
- Flat or troughed design
- Four leg footprint with mounting brackets
- Optional dust or moisture covers
- Alignment and speed switches optional
- Flow adjustment / control plates
- Fixed speed or VSD control (< 0.3m/s)
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Crushers
Jaw, impact rolls and cone crushers sourced for various sample material size reductions prior to sample subdivision. Low throughput (<10tph) and high reduction ratio machines recommended as required
Rotating Plate Divider
- For continuous or timed dry material splitting
- Suitable for primary sampling and secondary division
- Must be consistently fed by vibratory feeder or feeder conveyor
- Ideal sample divider for bulk materials handling systems
- Various sizes or models available 2/16, 2/40, 2/63, 2/90 and 2/125
- Takes multiple cuts of primary samples or feed
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Maintenance - Mechanically very reliable with up to 99% availability
- Gearbox lubricated for life 14 – 28 rpm
- No operating spares required
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Construction - Material – mild, VRN or 304 stainless steel
- Single sample and rejects discharge chute
- 1 to 4 bolt-on cutters possible
- Simple design and principle of operation
- Geared motor (0.37 – 1.5 kw)
| Installation - Self contained, robust unit
- Easily installed and retrofitted
- Electric operation – 380 to 600 volts, 50/60 Hz
- Control voltage 110V, 220V or 24Vdc to suit customer requirements
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Accurate And Reproducible - Secondary and tertiary division to produce composite final sample
- Bolt-on cutters allow alternative splitting ratios of 1% to 50%
- Cutter width minimum of 30mm (1 3/4”)
- Cutter rotates at = 0.45m/s (2ft/sec)
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Application Multotec indexer units are designed to split one sample stream into dedicated containers or to selectively collect one of a multi stream configuration into a specific container. The container units will fill sequentially on a timed base or on intelligent selective filling. Sample collection can also occur via a rotary splitter arrangement whereby replicate samples of equal mass are collected in a number of cannisters Construction - PVC sample collection containers on movable surface
- Linear or rotational movement on table
- 4 - 20 containers of up to 100 litre sizes
- Proximity sensors for bucket position control
- Alternative moving inlet chute design and fixed position containers
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Installation - Retrofit or greenfields projects
- Mounting brackets provided with adjustable feet
- Bolt-on inlet flange
- Timer based or intelligent PLC system control
Benefits - Compact rugged construction
- Custom design used for various applications
- Wide range of selective splitting
- Maintenance friendly and easily accessible
- Lockable container door with limit switch
- Easily removable locks and interchangeable containers
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