At Bauma 2016, Keestrack presented a representative cross-section of its full product range, including six crushing and screening units, designed specifically as efficient, highly productive mobile processing technology for recycling applications and aggregate production.
According to Keestrack, a high level of mobility on-site and between deployments, considerable ease of operation and maintainability and superior cost-effectiveness have for many years been the guiding principles in cross-technology development of mobile processing technology at the Belgium-based manufacturer. Long and rugged crawler track units and statically optimized frames and superstructures facilitate rapid and simple positioning or implementation of the fundamentally support-free operating crushing and screening unit. Especially in the medium output range between 250 and 300 t/h with frequently changing site conditions, Keestrack plants lie primarily within transport weights and dimensions not requiring authorization, guaranteeing operators good machine performance thanks to a high level of flexibility and low transport costs.
All Keestrack machines are finished to a high degree (including powder lacquering) and the sophisticated inclusion of sensitive components, such as extensive steel casing for all hydraulic circuits. Daily maintenance, machine adjustment and troubleshooting are facilitated by easily accessible service points or specific pivoting/lifting devices on belts or transfer points. Modern, specially adapted Relytec-SPS systems control and monitor all operating functions reliably. Keestrack is also now offering the option of GSM/UMTS supported remote monitoring with GPS satellite positioning for all its machines, permitting real-time access to machine data and functions. Plus, Keestrack’s own web portal enables the convenient management of machine and location data and the operational recording of operating sites (geofencing).
Keestrack says their offering of economically efficient and environmentally friendly alternative drives are currently state of the art in the segment of track-mounted processing technology of up to 60 tonnes. Currently, a total of 7 series of crushers, screeners and track-mounted stockpile conveyors have modern “ECO FS” diesel drives with efficient load-sensing hydraulic modules for power units and crusher functions. According to Keestrack, this provides potential fuel savings of approx. 30% over conventional drives. Currently 5 screening plants, 2 stockpile conveyors and 2 crushing plants are also available in a diesel-hybrid “ECO-EP” version with a diesel generator and electrical operating gear, or in an “ECO-EP+” version with an additional mains connection (“plug-in”). While the fuel savings of the ECO-EP package compared to conventional machines is approx. 53% (internal vs. ECO-FS: approx. 33%), the ECO-EP+ machines save up to 79% in all-electric operational mode compared to conventional diesel-fuelled machines (vs. ECO-FS: 70%). If the clearly lower maintenance costs compared to diesel drives are factored into this, the moderate additional costs of the ECO-EP drive packages will pay for themselves very rapidly.
Keestrack also introduced a new model nomenclature, launched at Bauma 2016. Instead of the traditional model names, a transparent system of letters and numbers, referencing individual product families and suitable machine combinations within the Keestrack offering will reflect each machine's capacity. The code for track-mounted jaw crusher is now “S”, and the family of crushers are categorized by jaw crusher “B”, cone crusher “H” and impact crushers “R”. The designations of the mobile screening plants will switch to “C” for heavy-duty screening units and “C” for the Keestrack production-classification units.
Crushing in all performance levels
Keestrack presented their proven mobile crushers at Munich as well as the further development and new high-end high-capacity large-scale models. With transport weights of less than 30 tonnes, the jaw crusher Keestrack B2 (formerly Argo) with a jaw width of 1000 mm and the crusher unit Keestrack R4 (formerly Destroyer 1011) with add-on screener and oversize material recycler, these models are designed to set industry standards in compact performance and high flexibility and efficiency, processing the most diverse of source materials.
This also applies to the Keestrack R8 top crusher unit (former Destroyer 1313), presented in Munich as a highly productive mobile solution in the output range of 450 t/h. As is the case for all Keestrack crusher units, features include heavy construction of the 1250 mm wide rotor of the R8 and its four impact bars (diameter: 1267 mm, weight: approx. 6100 kg) and a specifically larger crushing chamber for high crushing capacities at a very smooth operation, as well as long service life of the tools. A standard active double-deck pre-screening with crusher bypass optimizes the crushing result and minimizes wear and tear. The R8, with a double-deck add-on screening unit and oversize-grain recirculating conveyor, was presented in Munich. Keestrack says the optional equipment permits the production of three final grains via conventional removable screening media. Large-scale screening surfaces (each of which are 4500 x 1500 mm) and widely projecting stockpile conveyors help avoid frequently occurring bottlenecks of bolted-on screeners that are too small, leading to markedly declining production rates. As one of the few manufacturers in this performance segment, Keestrack offers the approx. 70 tonne R8, with a hinged four-axle dolly for transport by trailer (transport width: 3.00 – 3.20 m; length 16.70 – 17.80 m; height: 3.67 m (including dolly: 4.00 m)) in the 49.5 tonne basic version – with all the add-on options, including an overbelt magnet.
Keestrack also announced its new track-mounted cone crusher H4 (transport weight 35 - 50 t) as the first of its kind in the world. At the heart of this model, designed for high-value secondary or tertiary production in the 120 - 200 t/h performance range, is proven cone crushing technology from a world-renowned supply partner, with whom Keestrack has worked closely to optimize machines for deployment in mobile situations. According to Keestrack, a pioneering factor has been the advanced solutions in crusher control and monitoring systems, directly impacting output capacity and product quality. As the successor to the Galleon series, the Keestrack H4 was given a completely new frame design, enabling the incorporation of efficient pre- and post-screening units, but also the use of innovative drive technologies. For example, the Keestrack H4 is the world’s first mobile cone crusher with a highly efficient three-deck post-screening module and oversize material recycler, for the production of three high-grade end products in one pass. The company offers a choice of three economical drive combinations: Direct diesel drive of the crusher with electrical or electro-hydraulic peripherals (conveyors, screen units etc.) or the fully hybrid/”plug-in” version with similar electrical crusher drive via on-board diesel generator or mains power.
Highly flexible screening technology
The new Keestrack C8 track-mounted large-scale screening unit with expansion-shaft screening technology was first presented earlier in 2016 at Belgium’s Matexpo trade fair, and is was featured for the first time at Bauma. The plant's specially adapted BIVITEC technology, from Austrian development partner Binder + Co., in combination with the large screening surfaces of the double screening unit (2x 6000 x 1900 mm) and a very broad area of application in the economic recycling of various waste materials (glass, wood, slag etc.), guarantees the processing of difficult-to-screen materials that have high basic moisture levels, or in the production of large volumes of standard mineral products (up to 600 t/h). By providing different versions of the double screening unit – upper/lower deck: Flip-Flow or upper deck: Circular vibratory screen, bottom deck: Flip-Flow – it is possible to process, for example, minimum grain sizes of < 2 mm efficiently. If the linings in the upper-deck circular vibratory screen are changed, the unit can also be directly deployed behind a crusher or for the processing of hot materials (slag, substances containing tar etc.). The transport weight of the Keestrack K8 is 45.4 tonnes (B x H during transport: 3.20 x 3.60 m) including the 12 m³ feed hopper, overband magnet (option) and two side belts. Rapid on-site set-up times make even shorter-term site deployments of these efficient large-scale machines worthwhile.
The comprehensive Keestrack range of track-mounted heavy-duty screening machines was represented at Bauma 2016, by the Keestrack K4 (formerly: Novum). With a 4200 x 1500 mm double screen box, this compact machine offers one of the largest screening surfaces on the 30-tonne class and processes up to 200 t/h. As with all Keestrack machines, the K4 can be adapted to individual customer requirements, making it an economical solution for the sorting/grading of recycling materials or for the production of defined grain sizes at building sites or in extraction operations. The new mobile Keestrack D6 drum screen for organic applications was also presented for the first time at Bauma 2016.
