The number four and five tailings dams at Durban Roodepoort
Deep’s Blyvooruitzicht gold-mine are to be reclaimed.
DRA has undertaken a R40-million contract for the mining company,
as part of a project to reclaim these tailings dams at the mine
south of Carletonville The tailings deposits consist of about
25-million tons of ore at a gold grade of 0,587 g/t. “The
plant to process the deposits will be on stream in October, with
full operational capacity to be achieved by the end of the year,
following a build-up period of about two months. “Feasibility
work on the fast-track project began in April, with the decision to
begin implcompleat ore crushing plantementation in May,” says DRA process consultant
Bruce Ebell. He adds that the project will see the removal of the
mine dump closest to Carletonville. The tailings will be
transported using a pipeline of about 5 km to the plant, and an
additional 7,5 km to the current tailings dam, following
processing. “The project has been fast-tracked, as rock dumpsstone crushers factory in saudi arabia
at the mine are being depleted at a fast rate.
“However, the ore from the tailings will provide a new source
of feed for the mine’s plant to compensate for this,”
says Ebell. Fraser Alexander, which won the build, own and operate
contract for the mining of the tailings, will supply the
high-pressure water for thhot sale mtm medium speed trapezium mille required monitoring equipment, as well
as screens and pumps, enabling the transfer of the tailings to the
processing plant.
“The project will use existing equipment at Blyvooruitzicht,
including the old transfer-pump station, although new transfer
pumps will be installed at the reclamation site, which will be
upgraded to handcbn desk crushing mill diatomitele a higher tonnage,” says Ebell. He adds
that the existing residue pumps will be released for deployment at
the reclamation site.
Upon completion of the project, the reclamation of the tailings
will take place at a rate of 240 000 t/m.
Eight tanks in a hybrid two-stage carbon-in-leach (CIL) plant will
process the recycled tailings material. &conveyor belt seller in mombasa kenyaldquo;One of the eight
tanks will be converted into a preconditioning tank where lime and
oxygen will be added, and the other seven will be converted to CIL
tanks through the installation of interstage screens and
agitators,” says Ebell. He adds that high shear reactors are
being used for the addition of lime, oxygen and cyanide to improve
the kinetics for the dissolution of the gold, and reduce the
consumption of reagents. In addition, the reagents will use the
existing cyanide storage and dosing facility.
Loaded carbon will be sent to the existing elution plant for gold
recovery, and the residue from the tanks will be pumped to the
existing gold plant, and will be joined by the run-of-mine material
of 120 000 t/m.
“The the total material processed at the plant will be 360
000 t/m, compared with the current 210 000 t/m,” says Ebell.
The project will see modifications made to the tailings dam and the
dam-wall, which will be changed to a cyclone system. The return
water from the tailings dam will be pumped back to the reclamation
site over a distance of six kilometres for reuse as high-pressure
water.