Potosi Silver Mine, Australia

The Potosi underground mine is located approximately 2km to the north of the existing North Mine and is parallel to the main Broken Hill Line of Lode, in New South Wales, Australia. It includes two mining zones, known as Potosi North and Potosi Extended.

Owned and operated by Perilya, drilling of the Potosi Mine commenced in March 2007 but was kept under care and maintenance since September 2008 due to falling metal prices. Exploration studies continued through 2009 and confirmed the existence of minerals between the Potosi North and Potosi Extended zones.

The development was approved by the Broken Hill City Council in March 2010. The project was re-approved by the Perilya Board in February 2011, four years after the initial plans.

Development of the Potosi mine

"Potosi underground mine is located approximately 2km to the north of the existing North Mine in New South Wales."

Development work at Potosi began in 2011 and the production is expected to commence in late 2012. The project will mine at a rate of 450-500mt a year using the existing infrastructure and mining labour force of the Broken Hill Southern Operations.

The development cost of the Potosi silver mine is estimated at A$57.8m. Perilya will be funding the project from its existing cash reserves.

The Silver Peak deposit located adjacent to the mine is also being developed, along with the Potosi mine, as a combined project.

The development of Potosi / Silver Peak mine is expected to increase the production levels of the existing Broken Hill Mine by 30,000t in its first full production year and subsequently ramp-up to 45,000t.

Geology of Perilya's Potosi mine

The Potosi resource comprises narrow lenses present continuously from near the base of the pit to north of the Flying Doctor deposit located 10km north of the Broken Hill Southern Operations. The mineralised zone is 3km in strike length.

Potosi North and Potosi Extended represent 50% of the targeted mineralised zone along the strike.

Reserves at the New South Wales-based Australian mine

The Potosi Mine has inferred resources of 1.6 million tons (mt) at 14.1% of zinc and 3.4% of lead and 46 grams per tonne of silver (g/t). The Silver Peak mine has inferred resources of 390,000mt with 4.9% zinc, 9% lead and 77g/t silver.

Mining production methods to be used at the Potosi underground mine

Potosi mine was originally mined by Pasminco between 1996 and 2000 and was acquired as part of the Broken Hill prospect by Perilya in 2002. It was a 95m open-pit mine with an yield of 625,000t at 7.8% zinc and 1.6% lead.

"The development cost of the Potosi silver mine is estimated at A$57.8m. Perilya will be funding the project."

Potosi underground mine has a 1,400m decline developed from the previous open-pit mine. Its face is at 140m from the surface. A second decline will be developed adjacent to the Silver Peak mine and will be linked to the existing decline access.

Mining at Potosi will be undertaken through the modified Avoca method, wherein the ore is extracted in bottom-up sequence. A single crown pillar method will help achieve early ore production.

Stoping operations at the underground mine will be performed from a previously mined and now backfilled stope.

The current stope's width will be 3-15m and height 25m from the floor length. Waste rock will be used to backfill the stopes.

The ore will be transported in an underground truck to the surface, where it will be crushed in a portable crushing unit.

Potosi mine ore processing

The ore extracted at the Potosi mine will be processed in the Broken Hill Southern Operations concentrator. An access road will be laid to the Barrier Highway and the North Mine to truck the ore to the concentrator.

The capacity of the Southern Operations concentrator is 2.5mt. It is currently operating on a ten-day on / four-day off schedule and has idle capacity.

Processing of the Potosi and Silver Peak's crushed ore will bring the concentrator to full capacity and hence minimise the operating costs.

Coal processing equipments in South Africa

South Africa is not only rich in metal mining, but also rich in the nonmetal mining resources. For example, the coal reserve is the seventh of the world. Now South Africa is one the chief coal production countries, it is the fourth largest exporting country of coal and it is also the leader production country of liquid fuel made of coal. So coal crusher for sale in South Africa has big market. With more investors focus on the South Africa coal industry, Double has won more and more gaze from these investors.

Coal Processing Equipments

South Africa coal processing equipments offered by SBM are mainly jaw crusher, impact crusher, hammer crusher, ball mill and LM series grinding mills and feeder, screens and belt conveyors, etc.

Many producers produce coal aggregates, the coal crushing plants are able to satisfy their requirements. Many producers produce coal powders or process coal ash; in this case, the coal grinding machineries are very important.

Coal crusher plants

The commonly process of coal crusher plants in South Africa are similar with each other. Jaw crushers crush big coal lumps to small ones when they dig out from well or from deposits. It is really a easy work for Double jaw crusher. Actually, Double jaw crushers can be used to crush numerous mining ores and different stones, such as granite, marble, basalt, gravels, limestone, gypsum, clay, manganese ore, chrome ore, iron ore, gold ore, copper ore and zinc ore and so on.

As to the impact crushers, if the raw coal size is not very big, they can crush the lumps to small particles directly; if the raw coal size is big, impact crushers are used behind the jaw crushers. Though the application of impact crushers is wide, but impact crushers should used in crushing soft materials. If the coal deposit is small and producers just want to build one small coal production line in South Africa, Double hammer crushers are really good choices. Also, the output size of hammer crusher is quite small and adjustable, no other better machines are better than them in this function.

Coal grinding process

In the coal grinding process, ball mill and LM series grinding mills are widely used. It is well-known that many factors must be cared when producers grind coal powders, for example the inflammability. Double LM series grinding mill and ball mill well solve these problems. And they are really high performance and price ratio products.

Till now, Double has many coal crushers and coal grinding mills used in South Africa. Though the scales are not very large, they do make many more South Africa people know Double. And we do believe our service and our products will help us enlarge our market in South Africa in the near future.

If you are one investor and plan to invest in South Africa coal industry, just be free to contact us; if you any problems about the coal crushing plants just be free to contact us. You can chat with our engineer on-line, the answer will be shown you immediately; you could also leave your email address with us, we will get in touch with you within 24 hours.

Weir Minerals Products and Services

Weir Minerals specializes in delivering and supporting slurry and mine dewatering equipment solutions including pumps, hydrocones, valves and wear resistant linings for global mining and mineral processing, the power sector and the general industry.

The Warman® AH is the world’s standard for the most difficult mill duties. A wide variety of impellers and shaft seals provide a perfect fit for a wide range of applications.

The AH provides excellent wear life while maintaining efficiency during the wear cycle providing the best total operating cost. The Warman AH, together with the Warman series MC, provides a complete selection for most all duties in the mill. From cyclone feed to regrind, flotation and tailings, the Warman AH is the best choice.

Cavex® Hydrocyclones feature a unique laminar spiral inlet geometry. Cavex hydrocyclones are designed to deliver maximum efficiency, maximum capacity and longer wear life than conventional involute or tangential feed cyclone designs.

The Isogate® Heavy Duty Knife Gate Valve is a unique design with both ease of maintenance and overall ownership costs in mind.

Geho® PD Slurry pumps are world market and technological leaders in the design and manufacture of piston, piston diaphragm and hose diaphragm pumps for slurry, sludge and paste applications.

Warman® Centrifugal Slurry Pumps are the world's most comprehensive range of centrifugal slurry pumps for use in mining equipment, chemical and industrial applications.

To learn more about Weir Minerals products and Services go to the REQUEST MORE INFO button above or click on the DIRECT CONTACT button to reach Weir Minerals directly.

SBM websites: crushers, vibrating feeder, grinding mills

Advanced braking technology for grinding mills

Twiflex Limited/Hilliard Corp. has recently supplied their largest grinding mill braking system to Metso Minerals Industries, Inc. for installation on the Boliden Mineral AB, Autogenous (AG) gearless driven mills.

22.5 MW Primary AG Mill, 11.6m Dia - Boliden Aitik36 expansion

Discovered in the 1930’s, the Aitik mine in Northern Sweden is the largest open pit copper mine in Europe. Mining predominately copper the recent expansion (Aitik 36) will see production capacity double from 18 million tons to 36 million tons per year.

Two of the largest grinding mills commercially available and supplied by Metso have replaced the existing five mills. These 22.5 MW primary mills with wrap around motors measure 11.6m (38-foot) diameter x 13.7m (45-foot) long and will mean the two milling lines now have a capacity of 2025 tons per hour.

The grinding technique used in the Boliden concentrator is two stage fully autogenous grinding where the crushed ore constitutes the only grinding media in the primary mills. Pebbles (25-70mm) are extracted from the primary mills to make up the grinding media in the secondary ‘pebble’ mills.

The last five years have seen an increasing trend towards fewer comminution machines per grinding line with the result that units have increased considerably in capacity. Today, 38-foot mills with motor powers of more than 20 MW and Ball mill with diameters in excess of 24-foot (motor power of 11MW) are common place with operators looking for even larger equipment for greater economy of scale. Mills with these drive capacities are exclusively driven by a ‘wrap around’ ring motor (Gearless Mill Drive) and it is due to this development that braking systems have been necessary.

The Twiflex braking system is designed specifically for mine crusher and grinding mill installations giving both static and dynamic braking functions. In static operation the braking system is used to hold the mill during liner replacement and general mill maintenance. For dynamic operation the system can operate in two modes, stopping the mill from full speed in an emergency or providing inching/creeping functions in the event of bearing lubrication problems or power failures. For the first, a controlled application of the brakes is required and for the second, the brakes are operated quickly to give accurate stops needed by the mill operator.

The scope of supply for this project was eight Twiflex VMS-DP brake calipers with pedestals plus hydraulic power pack for each primary mill.

The Twiflex VMS-DP caliper has an adjustable braking force from 590 to 737 kN and is a floating spring-applied, hydraulically retracted brake suitable for disc/flange thicknesses from 117mm to 130mm. The brake can be used on installations with a braking path of at least 7.6m outside diameter (there is no upper limit) and 7m inside diameter. The hydraulic powerpack offers an advanced and versatile brake control as it allows both local and remote operation for inching and creeping duties through a control panel.

The braking system at Boliden can generate up to 38 MNm braking torque for each mill acting on a 12.97m mill flange diameter. The VMS-DP calipers weigh 1.85 tons each and are able to deliver 940 kN clamping force. With a full process charge of 1375 Mg the braking system is able to stop a mill in less than two seconds.

Mauritania mining processing plants

Mauritania is located in the western of Sahara. Though it belongs to underdeveloped country and is not known by many people. But the mineral resources of Mauritania do have great potential, particularly the iron ore resources. The proven iron ore reserves is the top two in Africa, it is also important in the world iron ore resources. Other primary minerals of Mauritania are gold, diamond, oil and gas, gypsum, phosphate, salt, kaolin, etc. So in many areas, many kinds of Mauritania mining ore crushing plants can be fond in the mining deposits.

Mauritania mining investment opportunity

Nowadays, the potential mineral resources win a lot of gaze of international investors. Foreign investors from different countries begin to invest in Mauritania mining industries. They purchase mining ore crushers and build mining processing plants in Mauritania. As a result, Mauritania mining investment is growing rapidly these years. In 2004, it became the Africa’s third-largest mining investor after South Africa and Ghana’s.

Mauritania iron ore resources

Mauritania iron ore resources are mainly fond in the northwest zones, different scale iron ore crushing plants are built near Zouerat areas. In 2005, it estimated that the iron ore reserves are about 700 million tons, and the Ferrum is about 400 million tons. Average grade is about 57%.
The iron ore production is about 10 million tons per year, most of them are for export. At present, many important iron ore companies plan to enlarge the scale.

Gold and Copper resources in Mauritania

Mauritania has earlier copper, gold mining history. The most important copper and gold deposits are located in Mauritania northern orogenic belt and northeast of Nouakchott.. Many famous foreign investor has invested here and many copper ore crushing plants and gold processing plants were built here for many years.

Gypsum Resources in Mauritania

The chiefly gypsum products are from the mining mountain in the north of Nouakchott. Every year, 100 thousand tons gypsum are produced here. But many of the scale of the gypsum crushing plants are quite small. Supposing large scale gypsum production line in Mauritania can be built, the capacity will greatly increased.

Mining ore crushers for sale in Mauritania

Being one of the world-lead mining ore processing equipments manufacturer in China, Double helps customers design many mining ore crushing plants used in Mauritania, such as medium capacity iron ore production line, small scale gold ore beneficiation plants and kaolin crushing plants and gypsum crushing and grinding plants. The popular equipments used in these plants are iron ore jaw crusher, iron ore cone crusher, gold ore hammer crusher and gypsum impact crushers and matched equipments like vibrating screens, vibrating feeder and belt conveyors, etc. We would like to cooperate with investors from different countries. So if you plan to invest in Mauritania mining resources, just be free to contact us.

Chat with our engineers on-line, you can get answers immediately; leave your email address or your phone number, we will get in touch with you within 24 hours. We would like to help you solve your problems with you together.

Crusher plant production and maintenance

The production line of crusher plant mainly consists of Vibrating Feeder, Jaw Crusher, Impact Crusher, Vibrating Screen, Belt Conveyor, Electric Control Box, etc. Double equipment design different production lines ranging 50 t/h to 500 t/h by combining different models of equipments also matching Cone Crusher, Bag Dust Catcher, etc. to satisfy different customers’ technological requirements.

Crusher plant maintenance

Convenient maintenance is so important in the quarrying crusher plant industry. Maintenance can be defined as working on something to keep it in a functioning and safe state and preserving it from failure or decline. Maintenance activities at quarries range from the maintenance of machines, equipment and vehicles to the keeping of roadways on site in good order, attending to such matters as providing edge protection and securing excavations.

It’s important to keep structural costs down, to design for ease of maintenance and operation, and to combine best practices with advances in fabrication and erection.

Best installation for crusher plant

In mining operations, the layout of crushing plants and ancillary equipment and structures is a crucial factor in meeting production requirements while keeping capital and operational costs to a minimum.Since the crushing plant’s structure and enclosure can represent the largest single cost element in a primary crushing plant, it is imperative to optimize these structural and construction costs to suit the life of the operation.

The fundamental goal for the design of a crushing plant is an installation that meets the required production requirements, operates at competitive cost, complies with today’s tough environmental regulations, and can be built at a reasonable price despite the rising costs of equipment, energy and construction labor.