Provide user chance to advance sustainable goals

Both models also feature K-ATOMiCS – Komatsu Advanced Transmission with Optimum Modulation Control System – which offers a six speed, fully automatic transmission. Komatsu said it automatically selected the ideal gear based on vehicle speed, engine rpm and the shift position chosen. A large automatic retarder system allows the operator to select the optimum operating speed on downhill travel under full load.
Both roaster types have self-generating energy by the exothermic oxidation of hydrogen sulfide, shown in the reaction below.
Meanwhile, Bell says its new Mark 7 generation of ADTs are more powerful and fuel efficient. The company says the new 40 ton B40D Mark 7 outperforms rival models by as much as +6% in terms of production, while burning -13% less fuel. A more powerful Stage IIIB engine has improved the truck’s power to weight ratio by +6.5% according to the company. This increased power translates to faster cycle times, while the introduction of a wet disc brake has helped reduce drag in the driveline.
In the smelting process, either hot calcine from the roaster or raw unroasted concentrate is melted with siliceous flux in a smelting furnace to produce copper matte. The required heat comes from partial oxidation of the sulfide charge and from burning external fuel. Most of the iron and some of the impurities in the charge oxidize with the fluxes to form a slag on top of the molten bath, which is periodically removed and discarded.
On the rigid hauler side, machines with engines under 560 kW must also comply with EU and North American emissions regulations. Such haulers are in demand for large quarry cone crusher operations around the world, unlike the more localised ADT market, and Caterpillar has dealt with the problem of different regulatory requirements in different regions by with different engine options.
On the other hand, for other markets around the world, the 777G can be fitted with a US Tier 2 or EU Stage II equivalent engine.
Caterpillar’s new 91 tonne class 777G rigid hauler, which replaces the 777F, can be fitted with a Tier 4 Final engine for more mature markets (two years in advance of the effective date of this next regulatory stage in the US), which it said provided customers an opportunity to advance their sustainability goals.
The new generation features Stage IIIB engines, and Bell has taken the step of using an selective catalytic reduction (SCR) system to meet the new emission standards. Bell says these new SCR engines from Mercedez Benz are 15% more fuel-efficient than their Stage IIIA predecessors, and the use of this technology is being marketed as the ‘Blue advantage’ in reference to the Adblu diesel exhaust fluid required for the SCR system.