13210RE: [FJGRailroad] Super steel
- Mar 1, 2008All concerned,
Anyone wishing to see a photo of one of these engines, my kids got the photos back from Rite Aid. I will scan and email to you if you like
Date: Tue, 19 Feb 2008 16:20:31 -0800
Subject: Re: [FJGRailroad] Super steelBased on a little on-line digging:
Mauritania (Islamic Republic of Mauritania)is a former
French colony located on the northwest cost of Africa.
In 1974 the government of Mauritania nationalized
MIFERMA (Mauritanian Company of Iron Mines - acronym
is from the French words) and created SNIM - Societe
nationale industrielle et miniere. The company
operates three large open pit iron ore mines in the
heart of the Sahara desert and its own single track
standard gauge railway to haul the ore 450 miles out
to the Atlantic port of Nouadhibou. Six trains are
normally run simultaneously - 3 full and 3 empty.
Average load weight is 23,000 tons. The main problems
noted for the railway are the tracks being completely
buried by the sand, the constant coating of sand on
the rails which cuts adhesion to 28-30%, rail wear,
and maintaining track geometry.
The usual motive power is three or four General Motors
SDL40-2s developed by Electro-Motive for special
desert operations. As far as that special air system
is concerned: "The trains generate their own
minisandstorm that enshrouds and follows the
locomotives the entire route, the sand being ingested
and then expelled by a sophisticated filtration
system. The central air compartment, which supplies
air to the engine and electrical equipment for
cooling, is protected by self-purging filters that are
pulsed by high pressure air to back-flush the
elements. After passing this stage, the air is
filtered again by specially treated fiberglass
elements before entering the engine's turbocharger. "
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