A plant train comprising a mobile jaw crusher and a scalper from Kleemann processes material for the rehabilitation of the infrastructure at an Indonesian lignite mine.
The particular challenges in the extraction of the material are its scattered locations on the mining site and the frequent need for blasting. In view of this, the ability to easily and flexibly relocate the machines was a very important criterion for the mine operator.
The MOBICAT MC 120 PRO is used as a primary crusher, while the downstream MOBISCREEN MSS 802 EVO mobile scalper is employed for the screening of the crushed material. First results show that the mobile plants from Kleemann enable trouble-free processing of the andesite rock. In the course of this, it was also clearly demonstrated that the machines had no problems at all with the special demands in the processing of this volcanic rock.
Both machines are also equipped with technology that allows operation from an external electric power supply – a future-proof and sustainable option. The infrastructure for this will be realized in the near future. Until then, the operator benefits from the low fuel consumption of the two machines. “The option for operating the machines electrically takes us a big step forward on the way to the achievement of our sustainability goals. Nevertheless, the fuel consumption is very low when we run the machines on diesel,” emphasizes Aditya Maulana Bainal, sales engineer from mine operator PT Bukit Asam Tbk.
Many of the features of the jaw crusher make a positive contribution to an efficient workflow. The hopper extension, for example, makes it possible to take on larger quantities of material and increases the hopper capacity from 10 to 13 cubic meters. The hopper walls can be folded out by remote control from the ground. The feed material is screened effectively by the independently vibrating double-deck prescreen. This enables fines to be removed via the side discharge conveyor before they reach the crushing chamber. The conveyor unit is also hydraulically foldable, and can remain on the machine during transportation. The rock chisel, a further equipment option for the jaw crusher, can break up larger boulders in the feed material at the machine before it is passed to the crusher. This allows easy removal of blockages caused by material bridging during the passage of material from the prescreen to the crusher. Another advantage is that the rock chisel can remain on the machine during transportation.
Another decisive factor alongside the performance and equipment options that ensure an efficient and effective production process is the outstanding on-site service. A Kleemann service technician spent two weeks at the site setting up the machines and instructing the local personnel in their use in readiness for the start of production. This involved a series of theoretical training sessions, practical application training, and trial runs.
