Аннотация
At BHP Billiton Iron Ore Newman Joint Venture (NJV) ore is railed from
four separate mine operations in the Newman area to Port Hedland,
where the ore is screened, crushed and blended to produce lump and fines
NJV products. Each mine’s grade varies separately, so it is important that
a centralised system is in place to control the overall blend and ensure
that the products meet customer expectations. It is important that graderelated decisions are built into the normal production process and have
minimal impact on production rates. A continuous stockpile management
system (CSMS) covering the whole NJV production process is used to
generate the daily crushing schedule, taking into account all currently
available ore sources.
Innovative additions to the CSMS provide more accurate information
to support decision making by the mine schedulers; for example,
blasthole estimates are continually adjusted for bias compared to crusher
and port rake grades; lump-fines (L-F) grade split and beneficiation plant
upgrade algorithms are updated on a continuous basis, and the dilution
effect, which impacts on reported port rake grades, is removed.
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