Rotary Cone Splitter

What is the Rotary Cone Splitter?

A rotary cone splitter distributes a falling ore stream evenly around a rotating cone into surrounding containers, producing several large portions of equal mass quickly. It suits bulk samples with coarse particles.

Overview

Material is fed onto the apex of a slow-rotating cone, which spreads it into an even curtain that falls into a ring of containers of identical size. As the cone rotates, each container is filled in turn, so all portions end up equal in mass and similar in composition. The design tolerates coarse particles and large throughputs, which makes it useful for reducing bulk samples from mine sites, aggregate plants and concentrator feed to manageable portions for shipment or further preparation. Typical units handle top sizes of 20 to 50 mm and produce from four to twelve portions per run. Because material free-flow dominates, the feed must be controlled and the cone kept free of build-up; the discharge openings are large enough to avoid blocking, and the whole assembly is usually mounted on a frame with a hopper and a dust cover.

How does it work?

Dividing must be proportional if the subsample is to represent the whole. Riffle splitters pour material across a bank of alternating chutes so that each side receives half. Vezin dividers take repeated sector cuts from a falling stream using a rotating arm, collecting a fixed fraction of many increments, which is effective for coarse ore. Rotary dividers rotate a set of vessels under a narrow falling stream so that each vessel receives an equal share of a full rotation. Rotary cone splitters distribute the whole stream around a rotating cone into surrounding containers of equal capacity, which suits large, coarse samples. Slurry splitters cut a falling pulp stream with a moving cutter or a rotating cone so that a small, well-mixed aliquot represents a large volume. Whichever type is used, the sample must be dry, free-flowing and mixed before dividing, and the device must be sized generously relative to the top particle size.

What are the key features?

• Slow-rotating cone spreading material into an even curtain
• Ring of identical containers receiving equal portions
• Handles top sizes from 20 to 50 mm
• Four to twelve portions per run
• Hopper with controlled feed gate
• Frame-mounted with dust cover

What are the technical specifications?

A typical rotary cone splitter configuration offers applicable top size of 20–50 mm, number of portions of 4–12, sample capacity of 50–500 kg per run, cone rotation speed of 5–20 rpm, mass deviation of ≤ 5 % between portions and contact material of Mild steel with wear liner. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Rotary Cone Splitter is used in bulk ore sample reduction at mine sites, aggregate plant quality sampling, concentrator feed subsampling and preparation of shippable sample portions. Across the wider Splitters class, laboratories also deploy it for subsample preparation for ore assay, bulk sample reduction at mine sites and aggregate and industrial mineral testing.

Which standards and certifications apply?

Relevant standards and methods include ISO 3082, ISO 12743, ASTM E877, ASTM C702, GB/T 2007 and IEC 61010-1. Certification candidates for this model are CE and ISO 9001 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Position dividers so the feed falls evenly and the whole stream is presented, since a stream that hugs one side of a riffle bank biases the split towards the other. Keep equipment clean and dry between samples, and clean chutes, vessels and cutters with brushes rather than water where moisture must be preserved. Weigh the fractions regularly and record the mass tolerance, because a persistent imbalance indicates wear, blockage or poor feeding technique. For riffle splitters, check that chute edges are not bent and that no chute is blocked. For Vezin and rotary units, verify the rotation speed and the cutter or vessel positions. For slurry splitters, agitate the pulp before and during splitting and check that the cutter passes fully through the stream. Calibrate and service motors, feeders and counters as part of the quality system.

How do I select the right Rotary Cone Splitter?

Select the cone splitter for coarse, large bulk samples that must be divided quickly into several equal portions. Specify top size, portion count, capacity and cone speed, and arrange a controlled feed system plus extraction for dust.

How does it compare with other Splitters variants?

Choose the splitter mainly from the top particle size and the mass to be divided. Riffle splitters are the general-purpose tool for material between about one and 25 mm, provided the chute width is at least two and a half to three times the top size. Vezin dividers handle coarse ore and large masses because each sector cut is small and the device takes many increments, which reduces bias from segregation. Rotary dividers give the best precision on fine material below about three millimetres and can be automated. Rotary cone splitters suit bulk samples where several equal portions must be produced quickly. For pulps, a slurry splitter with an agitator is essential because coarse particles settle within seconds. In every case, check the mass tolerance the method states, verify it by weighing the fractions, and keep the sample dry and consistent in size before dividing.