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Aumund package for Rabigh plant

Aumund Fördertechnik GmbH has received an order for delivery of a substantial package of machines for a grinding plant being constructed in Rabigh, Saudi Arabia.
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Arabian Cement Co. (ACC) is currently building the new Brownfield-cement mill in Rabigh, with a clinker production capacity of 10,000t per day.

Initially, the grinding plant will grind externally produced clinker. By July, 16 bucket elevators, seven deep-drawn pan conveyors, four arched plate conveyors and two Centrex machines will be delivered by Aumund.

Depending on their field of operation, the 16 bucket elevators are equipped with belt or chain and have elevating heights between 22m and 73m. They will be utilised for the transport of cement from the grinders to the cement hoppers, for the clinker transport, for the charging of the grinders and for the grinder circulation.

One of the bucket elevators will be used for charging the grinders with additives (pozzolana, limestone and gypsum). The conveying capacity of the individual machine is between 120t and 660t per day.

Five of the seven deep drawn pan conveyors (axis-centre distance: 50-148m, conveying capacity: up to 800t per day) will be equipped with baffles.

The deep-drawn pan conveyor with baffles (KZB-Q type) has been constructed for inclination angles up to 45 deg and axis-centre distances up to 78m. Baffles bolted to the pans and stabilised by catches pressed into the side panels, provide for flexibility and an efficient, reliable transport during conveying up the inclination.

With the pan conveyor, conveying capacities between 33 and 1,300 cu metres per hour and pan widths between 400mm and 2,400mm can be realised. The conveyor utilised at ACC Rabigh has a pan width of 1,800mm and will be used for transporting clinker to the clinker hoppers.

Because the customer wanted to completely eliminate the use of spillage conveyors, Aumund developed special discharge chutes with spillways as part of the plant layout. Special spatial demands also had to be considered. Since the optional transfer of the material to two different conveyors was to be a possibility, each of the chutes were designed to serve a deep-drawn pan conveyor on both sides.

Four arched belt conveyors with a pan width of up to 2.4m are utilised for the transport of clinker, gypsum, additives and pozzolana. The highest performance machine for the transport of clinker has been designed for a capacity of 1,200t per hour.


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