Mobile HarbourEquipment - Agg-Net.com · cement plant of Southern Province Cement, located some 50km inland, and transferred to the port by a fleet of tipping trucks working on a

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Materials Handling

By Andrew Mitchell, managing director, B&W Mechanical Handling Ltd

MobileHarbour Equipment

Mobile shiploaders offer an attractiveoption for the export of dry bulkcargo direct from truck to ship,

eliminating costly fixed-conveyor installationsand port infrastructure, and allowing almostany berth to be utilized for bulk exports.By combining Group resources, Aumund

are able to offer a comprehensive range ofsolutions, including the B&W surface-mounted Samson feeder, Stormajor mobileradial-boom stacker andmobile shiploaders,along with the established range of Schadestacking and reclaiming solutions forenclosed dust-controlled storageapplications.

SSaammssoonn ssuurrffaaccee ffeeeeddeerrBy incorporating a Samson surface feederinto the shiploader as a single mobile unit,almost any bulk material may be receiveddirect from tipping trucks, providing integralbuffer storage and controlled-rate dischargeto minimize truck turnaround times.As illustrated in figure 1, for maximum

performance twin Samson feeders may bemounted to a single shiploader chassis to

achieve loading rates from truck to ship inexcess of 2,000 tonnes/h.With the addition of powered travel

facilities, the high-performance mobileshiploader offers a viable alternative to

conventional fixed installations.Reacting to the demands of clients, B&W

have developed their mobile shiploader withfacilities specifically geared to the handlingof cement clinker – an extremely �

Fig. 1

The Aumund Group, including Schade and B&W Mechanical Handling, are developing anddiversifying their activities throughout the ports and terminals industry worldwide with majornew projects involving bulk material export, storage and handling, including dust-controlledequipment

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aggressive and dusty material.The mobile shiploader shown in figure 2 is

one of two units delivered to the port of Gizanin the kingdom of Saudi Arabia. It is dedicatedto the export of cement clinker and typicallyloads ships of Handymax size at rates of upto 1,200 tonnes/h.In this project clinker is produced at the

cement plant of Southern Province Cement,located some 50km inland, and transferredto the port by a fleet of tipping trucks workingon a merry-go-round principle. At the port theclinker is stored locally and transferredfrom storage to the shiploader, mainly byloading shovel.The equipment includes an integral

Samson surface feeder unit mounted to themachine chassis and designed to acceptmaterial by loading shovel or direct fromdumptrucks bypassing the local storagefacility.This is a fully mobile unit with powered

travel and an independent on-board dieselgenset, thus eliminating the need for anypermanent conveyor system, shore-sidepower supplies or fixed port infrastructure.As illustrated in figure 3, the mobile

shiploader has been extensively developed toinclude full dust-control measures, such asthe Cascade chute, to control dust pollutiondown to the hold floor. In the applicationshown, the equipment is handling kaolin ata peak rate of around 1,000 tonnes/h directfrom tipping trucks via twin integral Samsonfeeder units.In this case, simple, flexible, PVC-clad

enclosures are provided for the Samsonunits and the out-loading boom, with nofan-assisted or other type of dust-extractionsystem, even though kaolin is an extremelydusty material and the equipment is operatingat the Port of Par, which is located in anextremely popular tourist area of the UK.By virtue of the handling characteristics of

the Samson feeder, material is effectivelydrawn into the Samson body by the forwardmoving belt, thus eliminating free fall andsubstantially eliminating dust generation atsource.

For receiving material from tipping trucks,the Samson surface feeder offers a flexibleand economical alternative to conventionalunderground pits or hoppers, with the addedbenefit of much-reduced dust generationand complete flexibility of location irrespectiveof local ground conditions. Being surfacemounted, the Samson unit can offer real costadvantages in a port environment where thenormally high water table makes conventionaldeep pits extremely expensive to construct.

Fig. 2 Fig. 3

Fig. 4

Fig. 5

SSttoorrmmaajjoorr rraaddiiaall--bboooommssttaacckkeerrFor barge-loading operations the B&WStormajor radial-boom stacker (fig. 4.) isproving popular in a number of diverseindustries and different global locations.Thanks to the long outreach of thecantilevered out-loading boom, the traditionalB&W Stormajor can operate on a simple riverberth and discharge direct to barges moored

Fig. 6

to a pontoon or similar berth, therebyeliminating the need for any permanent civilworks and providing maximum operationalflexibility.For importation in the port or bulk

terminal, the B&W mobile Stormajor radial-boom stacker offers considerable flexibilityand can be used for stacking, barge loadingand rail-car loading, making it an extremelyversatile piece of equipment.Figure 5 shows a new machine constructed

for the port of Neuss Düsseldorf, in Germany.The Stormajor receives imported iron orefrom bulk carriers via grab crane and loadsdirectly into rail wagons at a controlled rate.In this application, the Stormajor features acontinuous weighing system to monitor thecontents of each rail car in order to avoidoverloading.Figure 6 shows a similar machine loading

rail cars direct from tipping trucks at asiding in northern France. In this case theStormajor is equipped with powered travel

capabilities, allowing the unit to move alongthe wagon train and eliminating the need fora locomotive, thus saving on operationalcosts while maximizing flexibility.A second new and significant order, being

manufactured for Basalt AG of Germany butdestined for Russia, is shown in figure 7. This

Stormajor unit will be used to export hardstone (gabbro), which is delivered to theshipping berth in large off-highwaydumptrucks.This is the largest Stormajor to be designed

by B&W to date and it incorporates a large Samson 1600-Series feeder plus a �

Fig. 7

Materials Handling

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Materials Handling

30m long outloading boom with sufficientoutreach to load barges moored to offshoredolphins.Developed for the mining and cement

industries, Samson 1600-Series feeders aredesigned to handle as-mined rock with lumpsizes up to 500mm, acting as primary feedunits for crushing or similar primary intakeplant. Available with holding capacities up to100 tonnes in mobile configurations, theSamson 1600 expands the application rangeof the Stormajor to extreme-duty operationsin the most arduous conditions.In this particular case, the equipment will

be designed and built for operations inextremely low temperatures (down to –40°C).This will require specialized constructiontechniques and component selection to ensurereliable operation.At the opposite extreme, Salgaocar Mining

Industries of India have chosen the Stormajorfor the loading of iron ore on to barges at a rateof 1,250 tonnes/h in temperatures up to 45°C.A total of six Stormajor units were delivered

for operation on various river berths in andaround Goa. Since there are no deep-waterports nearby, the iron ore is transported byself-propelled barges to a floatingtranshipment facility anchored offshore,where, typically, vessels up to Panamax sizeare loaded.In this application the Samson 800-Series

feeder section, with its extended loadingarea, receives material from up to threetipping trucks simultaneously to achieve therequired average loading rate. Figure 8 showsone of the units during commissioning.

EEccoo--HHooppppeerrFor bulk material imports, the B&W Eco-Hopper offers a solution for the grab-discharge handling of heavy and abrasivematerials, such as cement clinker, or light anddusty materials, eg biofuels.The hopper includes integral dust filters

mounted between the inner and outer conesaround the periphery of the hopper inlet.Combined with flexible baffles directly below

the reject grill, dust is contained within thehopper bowl and fugitive emissions are minimized to reduce environmentalpollution.The Eco-Hopper is available for direct

discharge to a belt conveyor, as shown infigure 9, or with an Aumund dust-controlledtruck-loading spout for direct discharge totipping trucks.All of the above examples of B&W Aumund

Group products are designed to offer port orterminal operators effective materials-handling solutions, while providing maximumoperational flexibility and minimuminvestment risk.For further information, contact B&W

Mechanical Handling Ltd on tel: (01353) 665001; fax: (01353) 666734; email: [email protected]; website:www.bwmech.co.uk

Fig. 8

Fig. 9

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