ROBE RIVER ROBE IS THE FOURTH LARGEST SEABORNE TRADER IN IRON ORE WESTERN PROCESSING BETWEEN 27 AND 32 MILLION TONNES PER YEAR.

Robe River Iron Associates is a dynamic Australian joint venture In 1996 Robe purchased an MMD 1500 Series Twin Shaft Sizer fit- which is widely regarded as the worlds most cost effective, consis- ted with 4 Tooth heavy duty rotors. The sizer is powered by two 500 tent and reliable supplier of Iron Ore. It's major deposits, current- hp electric motors, each driving though a fluid coupling and MMD ly estimated at 3 to 4 billion tonnes, are found in Mesas stretching Heavy Duty Gearbox. This machine was designed to achieve the for 100 kilometres along specification demanded by Robe, which was to reduce the ROM ore the ancient Robe River from sizes up to 2.0 x 2.0 x 1.5 metres down to a nominal -300 mm, Valley in Western at an initial 6,000 tph but with a guaranteed output of 10,000 tph to Australia's facilitate future expansion plans. The haul trucks which operate 24 Region. The mine is hours per day, 7 days a week, all year round, dump into the sizer sta- located 1,400 kilome- tion's 1200 tonne capacity hopper, then the apron feeder discharges tres north by road from Tipping ore into a 1200 tonne directly into the the state capital, . dump hopper. MMD Sizer at a A 200 kilometre railroad controlled rate. A conveyor, running at 4 m/s, then transports connects the mine to the the nominal -300 mm product to the train loadout hoppers. Mesa A in 1973 port facilities at Cape The following are some of the benefits which have resulted Lambert. The ore is loaded into large capacity haul trucks by excava- due to Robe’s decision to install the MMD Sizer System:- tors, electric rope shovels and front end loaders at the face and trans- Less down time due to hold ups in the loadout system; Faster ported to the loadout station. Average haul distances are less than 2 loadout times with more even loading of rail cars giving a 5- kilometres, significantly lower than most large scale operations. To P&H 2100 Electric Rope shov- 10% gain in car capacity; Elimination of damage to the cars achieve greater ore handling efficiency by reducing the Run of Mine el loads a 190 tonne truck due to the impact of large lumps; Increased production cou- rock to a nominal minus 300 mm before being loaded on to the train, pled with a reduction in both maintenance and production the decision was taken in 1995 to install a Mineral Sizer at Mesa J. costs. These benefits indicate very significant overall cost Loading 100 tonne rail cars savings that fully justify the capital invested in the Sizer Problem and Solution Station by Robe. By the elimination of massive oversize lumps :- 1) Rail car capacity increased by 5-10% 2) Damage and hang ups at loadout eliminated 3) Damaged rail cars eliminated 4) Damage at port handling facilities eliminated 5) Primary crushing at port eliminated Maintenance costs slashed

Why not contact MMD A 200 car, 20,000 tonne payload on its way to Robe’s port facilities at Cape Lambert, crosses the bridge spanning 360 metres.

World Leaders in Mineral Sizers Sizing Minerals Around the World Loading System Short haul Truck and Shovel. Dump Hopper Capacity, 1,200 tonnes ROM ore. Conveyor Conveys ore from sizer to train loadout hopper. Apron Feeder Capacity 9.8 metres long 6,000 tph. 2.4 metres wide. Belt width Capacity 1.6 metres 10,000 tph. future 1.8m Mineral Sizer 10,000 tph. Sizes ROM ore to Mesa J nominal -300mm. Loadout MMD 1500 Series Hopper Twin Shaft Sizer capacity 4 tooth rotors 5,000 tonnes. double drive. Twin Feeder Guaranteed capacity capacity 7,000 tph. 10,000 tph.

MMD Sizer MMD Sizer 1500 Series (see inset) 4 tooth rotors 10,000 tph Dump Hopper capacity 1,200 tonnes

RAIL LOADOUT SIZER Conveyor STATION current capacity 6,000 tph future capacity 10,000 tph Loadout Hopper capacity 5,000 tonnes (c) 1999 The MMD Group of Companies All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, transmitted by any means, electronic, mechanical, photocopying, or otherwise, without the prior permission of the publisher. Mine Sizing Facilities

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