DOP Submersible dredge pumps

Amphibious excavator with DOP250 challenge the breakers


Location: Tormin mine, Western Province, South Africa

Period: start Q2, 2017

Product type: DOP250 with cutter head

Contractor: Mine Site Construction Service, Australia

DOP250 mining in the surf zone

On the Western coast of South Africa, high grade heavy mineral sediment layers are found on the seashores. Located just below a layer of fairly standard quartz sand, this heavy mineral sand can be mined. The material, which is also called HMS, has a relatively high specific gravity of 2.8T.m3 in situ. It contains for instance Rutile, Magnetite, Garnet, Ilmenite and Zircon.

DOP250 with cutterunit attached to an amphibious excavator.

Until recently the mining operations in the surf zone were done conventionally using excavators and trucks. Yet they have to be relocated every time the tide comes in. The DOP250 however can mine continuously when attached to an amphibious excavator. The power pack driving the DOP has been mounted on the excavator.

The DOP250 at work in the surf attached to an amphibious excavator.

The DOP250 now mines heavy mineral sand at a max dredging depth of 10 m. The heavy sand mixture is pumped in a concentration up to 25% over a distance of 250 m over a cliff of 15 m in height. On shore the processing plant separates the valuable minerals from the quartz sand and stones.

The mining site on the sea shore.

The DOP250 has proven to be an asset reaching rich untapped deposits.