Complete e-portfolio in mobile crushing will include two successful 30-ton crushers. Keestrack will present all flagships of its track-mounted jaw, impactor and cone crusher series as diesel-electric full hybrid plug-in systems. According to Keestrack, the new and enhanced models are not only class leaders for 60 to 70-ton transport weight in terms of size, output, product quality and variety, but are also setting new standards for cost-efficient operation with their sophisticated drive concepts. Without restrictions in transportability and tracked on-site mobility, Keestrack's diesel-electric heavy crusher range meets the requirements for volume-intensive recycling jobs on construction sites, as well as for flexible multi-stage production of mineral aggregates in pits and quarries.
For the first time internationally, Keestrack will present its jaw crusher Keestrack B7e, as a new 700-tph flagship, replacing the smaller B6. The plant's core is the tried and tested single-jaw, jaw crusher CJ 412 with a 1200x830 mm inlet for feeding sizes up to 700 mm, and a wide, hydraulically adjustable CSS range of 75 – 250 mm.
According to Keestrack, energy-saving costs of up to 80% can be obtained in emission-free plug-in operation from mains or external gensets. The plant with a total weight of just under 69 tons (with options) is highly mobile: by detaching the 6m³ feeder unit incl. pre-screening, the weight drops below 60 tons. High production capacities in secondary and tertiary crushing are guaranteed by the full hybrid cone crusher Keestrack H6e. With a maximum feed size of 215 mm, variable crushing chamber configurations and stroke settings (CSS: 6 - 44 mm), the specially adapted Keestrack KT-H6 based on proven Sandvik technology, processes up to 400 t/h of most various raw materials. Optionally, an efficient three-deck post-screen module (tot. 24.5 m² surface) with oversize recirculation provides high-quality end products, thus guaranteeing high added value. This versatility is also the success of the impact crusher R6e as a compact and highly mobile "1300" with double pre-screening and double-deck post-screen module incl. oversize recirculation.
Particularly sensitive are transport weights for compact all-rounders of the 250 to 300 tph class. Here, Keestrack will display its fully hybrid impact crusher R3e with single-deck post-screen and oversize recirculation (total 32 t), which was introduced last year. Also on show will be the jaw crusher Keestrack B3e with new independent pre-screen. The electric-driven double-deck unit (1,6 m² + 1,2 m²) optimizes efficiency and wear of the 1000x600 jaw crusher, still being the largest unit within the 30-ton class. The electrical equipment of the predominantly diesel-hydraulically driven plant includes a 42.5 kVA generator for all conveyor drives and ancillaries, and the 16A plug-out connection for downstream screens or stackers.
Compared to conventional diesel-hydraulic units, diesel-electric driven plants directly save up to 40% of fuel. While working in production trains, the attributable fuel consumption may even decrease by 70% when the hybrid screeners are powered directly via the plug-out supply of an upstream or downstream diesel-electric crusher. To fully exploit this potential, Keestrack offers six models of its double-deck scalpers (250 - 1000 tph) optionally as full hybrid plug-in versions.
New to the "e"-programme is the scalper Keestrack K6e: With 8 m³ standard feeder, and 4500x1800 mm double-deck screen box (2 x 8.1 m²), the nearly 30-ton plant produces three fractions with 600 tph, and can be adapted to a wide range of materials and applications with a variety of screen media and additional equipment. A full hybrid screen solution with high potential for economical semi-stationary operation from mains is the Keestrack K5e Flip Flow (approx. 29.5 tons).
Futuristic will be the world premiere of the tracked stacker Keestrack S5e "Solar", probably world's first directly solar-driven processing plant, with photovoltaic modules mounted above the 23 m long conveyor feed a 23-kWh battery installed in the chassis.