Engineering & Mining Journal

JUN 2019

Engineering and Mining Journal - Whether the market is copper, gold, nickel, iron ore, lead/zinc, PGM, diamonds or other commodities, E&MJ takes the lead in projecting trends, following development and reporting on the most efficient operating pr

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Page 72 of 115

? IN-PIT CRUSHING JUNE 2019 • E&MJ 71 CAPEX than truck fleets and their payback period can be significant. However, if the installation runs to plan, a large reduction in OPEX through minimized maintenance and fuel costs as well as high availability can mean that these systems are a smart investment in the long term. IPCC systems also have a much longer life span than truck and shovel fleets, re- quiring fewer investments over their duration and, as a result, they are more suitable for long-life projects. "The parameters that impact net present value (NPV) tar- get in traditional layout versus IPCC systems consist mainly of electricity/diesel cost, and the additional CAPEX required for conveyors versus truck haulage," Lambert explained. In the past, operators would consider truck and shovel as their only option for material handling, but today, every project, regardless of whether it's a greenfield, brownfield or expansion is investigating alternatives. The greatest interest in IPCC naturally comes from mining companies that have already introduced conveyors and understand the savings that can be made, as well as the changes required in mine plan- ning and maintenance regimes. Jabs explained some of the key drivers for the use of IPCC. "The higher the required capacities, the more interesting it becomes," he said. "The shape of the orebody in general is an important factor: orebodies with a wide, horizontally orient- ed configuration are usually better suited than predominantly vertically oriented orebodies." He added that the vertical component, while also diffi- cult and costly for trucks to negotiate, has a negative effect on ramps for conveyors — something high angle and sand- wich belt conveyor concepts aim to address — and this can also make it difficult to bring large items of equipment into the pit. WKHIXWXUHRIIXHOLQJ ? ZZZIORZWHFKIXHOLQJ RWE points to German lignite mines as a good example of what can be IPCC technology. (Photo

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