Traditionally the process selection choice was between a conventional well-tried three-stage crushing circuit followed by ball milling or single-stage crushing followed by a semi-autogenous SAG mill and ball mill.Get A Quote
Traditionally the process selection choice was between a conventional well-tried three-stage crushing circuit followed by ball milling or single-stage crushing followed by a semi-autogenous SAG mill and ball mill.
Mining-pedia is a valuable and professional communication platform who focuses on providing mineral processing knowledge mineral extraction process and the concentration of ore. Mineral Extraction Mineral Processing Concentration of Ore Ball Mill - Mining-pedia
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Regular inspections and maintenance help FMR to ensure mill discharge pumps are ready for action
FMR Investments was formed in 2007 when specialist hard rock underground mining services provider Barminco - founded in 1987 divested its contracting business. Today the company operates three mining projects in Australia the Eloise Copper Mine in northwest Queensland as well as the Greenfields Mill and Gordon Sidar mine both of which are located in Western Australia.
The Greenfields mill is situated in the Western Australian goldfields three kilometres east of Coolgardie. For over twenty years the site has provided first class toll milling to the local gold mining industry. The plant has a unique setup with three ball mills allowing the circuit to be optimised for gold recovery depending on the needs of different clients. In its current configuration the plant can process up to one million tonnes per annum.
Stockpile ore delivered by FMRs customers initially passes through a three-stage crushing circuit consisting of a primary jaw crusher followed by secondary and tertiary cone crushers. The feed from the secondary and tertiary crushers is graded by a double deck screen that removes undersize material from the circuit. The crushing system produces a P80 product size between 6 and 8mm which is then transferred and stored in a 1000 tonne mill feed bin.
The overflow product from the cyclones is sent to a CIL Carbon In Leach circuit. In this process gold is dissolved from the ore in a cyanide solution in the presence of oxygen and the resultant gold cyanide complex molecule is then adsorbed onto activated carbon. The gold is stripped from the loaded carbon in a process known as elution. Gold is later recovered from the pregnant strip solution by electrowinning onto steel wool and direct smelting before shipment to an external refinery.
Critical to the operation of the mill-to-classification process are the plants mill discharge pumps. They are responsible for transporting the milled slurry up a large vertical pipe to the classification cyclones.
The pumps process a high volume of material that is highly abrasive in nature. This means that key wear components must be monitored regularly to ensure the pumps operate efficiently and prevent unexpected downtime.
Alternative Registered Manager at Greenfields Mill Morgan Dombroski says that the mill discharge pumps are a critical part of the sites process. The pumps feed the classification cyclones which are the mother of the whole plant. If the pumps are down we arent producing a product - which is a big deal for our site.
Dave Scott FMRs Maintenance Supervisor describes how their pump setup has been designed to ensure there is always one pump available. If the mill circuit is stopped it basically costs the business about 40000 per hour. Thats why we have a pair of pumps for this application. If the active lsquoduty pump fails or is under maintenance there is always a standby ready to take over.
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