Capital Equipment News

Keestrack, an international specialist in mineral processing technology, has expanded its range of track-mounted machines for the manufacture of high-grade final grain products with the launch of its H6e cone crusher. Similar to the Keestrack H4e introduced in 2016, the new 62 t fully hybrid machine is said to be based on the market’s leading crushing technology, together with an innovative diesel-electric drive concept, enabling full flexibility at maximum cost efficiency.

Keestrack announced the expansion of the new series at least a year ago, shortly after the successful launch of its fully hybrid H4e cone crusher, approximately 46 t, with a maximum production capacity of 250 t/h). That is now followed by the Keestrack H6e 400 t/h model.

Keestrack H6e 1

A maximum feed size of 215 mm and very variable crushing chamber configurations and stroke settings enable the Keestrack KT-H6 to offer a wide CSS range from 6 to 44 mm, while the drive and control technology have been specially adapted in line with the Keestrack hybrid concept.

The crusher is driven by a 220 kW electric motor – the lubrication system, the hydraulic Hydroset control with overload cut-out and the air compression of the crusher housing are powered by separate electric motors/pump units. All crusher functions are incorporated into the central Keestrack PLC controller, which also enables loading personnel in excavators or loaders to operate the machine by means of a remote control unit. As an option, Keestrack-er satellite-based telemonitoring documents all the key performance data of the crusher in real-time, alerts the operator to any malfunctions and collects the current production data if a belt-scale is installed (optional).

A 345 kW Volvo diesel engine with a connected 500 kVA generator supplies the onboard energy. The entire drive unit is designed as a removable module, as now is the case for the smaller H4e machine. Located remotely from the crushing plant, dust and vibration levels can be clearly reduced, maintenance access can be facilitated and hence the availability and service life of the drive unit can be clearly optimised.

All the crusher operating functions remain active, including the 63A connector for add-on screening units or stockpile conveyors. The Keestrack H6e also offers plug-in power supply from the mains or additional generator as a standard, making it possible to reduce direct energy costs by up to 70%.

The size and capacity of all charging and discharging equipment are geared to the high capacities of the aggregate crusher and, like the track drive, hydraulic cylinders and other hydraulic components (motor/engine fans) are powered via the load-sensing operating hydraulics by two 30 kW electric motors. Thanks to the lower number of consumers of the Keestrack hybrid concept, new cyclone extraction technology and the generally good cooling characteristics of the largely steel piped hydraulic system, the operating-cost-sensitive volume of hydraulic fluid could be reduced to 120 litres.

A 1 200 mm wide hydraulically driven belt feeder with integrated metal detector feeds material from the 8 m³ hopper (optionally 12 m³) with load-release device for the equal distribution of the feedstock (max. 400 t/h). The main discharge conveyor has an 11 kW electric drive motor and reaches a drop/transfer height of 4 800 mm, offering a stockpiling capacity of 350 tonnes without post-screening.

With a total screening area of 24,5 m² over three decks, the optional H6e post-screen module also guarantees high production rates including oversize material recycling. The screen box has a sensor-monitored hydraulic drive, with all belts powered by maintenance-friendly electric drum drives. Providing large stockpiling capacity during operation, the discharge conveyors for transport can be fully retracted hydraulically for transport beneath 3 000 mm overall width.

Contact Capital Equipment News

Title: Editor
Name: Munesu Shoko
Email: capnews@crown.co.za
Phone: +27 11 622-4770
Fax: +27 11 615-6108

Title: Advertising Manager
Name: Elmarie Stonell
Email: elmaries@crown.co.za
Phone: +27 11 622-4770
Fax: +27 11 615-6108

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