Thickener Startup & Shutdown Procedure
An EXAMPLE Startup of the thickener may occur under two sets of very different circumstances: After a major plant shutdown or the initial plant start-up, when the thickener is completely empty OR/AND After a shutdown whereby the thickener has been left full of pulp, and rakes and underflow pumps have been inoperative (such as after a […]
Mill Feed Thickener Operating Principles
Under normal conditions our EXAMPLE mill feed thickener rake drive will operate with the gear mechanism lowered, regardless of grinding or leaching operations. Operating lights on the mill control panel indicate whether the rakes are fully lifted, fully lowered, moving up or down, turning or stopped. An exact intermediate rake position is not indicated on […]
Grinding Circuit Startup and Shutdown Procedure
Grinding and Classification Circuit
Our EXAMPLE Grinding and Classification Circuit is designed to grind 500 tonnes of ore per day, operating 24 hours per day, with an availability of 95%. This circuit will grind -5/8″ material from the Crushing Plant, classify the slurry in one of two cyclones, and pass 70% of the minus 200 mesh material to the […]
Crusher Shutdown Sequence & Procedure
Normal Crusher Shutdown Sequence & Procedure Shut down the apron feeder. Wait until all equipment is free of material. Shut down the jaw crusher. Stop conveyor #3, associated interlocks will shut down the rest of the equipment. Shut down the cone crusher and lube system. De-energize the electromagnet. (Swing the magnet clear of the conveyor […]
Crushing Plant Startup Sequence & Procedure
The following items make up an EXAMPLE Crushing Plant Startup Sequence & Procedure that all must be checked in preparation and before the equipment in the Crushing Plant is started. If maintenance has occurred since the last operating shift, ensure that the MCC is energized and that all safety locks have been removed from equipment starters. Walk along […]
Small Crushing Plant Operating Guide
This EXAMPLE Small Crushing Plant is designed to crush 500 tonnes per day, operating 12 hours per day with an availability of 70%. The Plant will crush run-of-mine material (-16″) to 100%, passing 5/8″ at a rate of 60 tonnes per hour. Start-stop stations are provided for all equipment in this Plant at the crusher control […]
Gold Processing Plant Glossary
Apex: The point of a cone. The point of a cyclone from which coarse material is discharged. In a cyclone, it is open and the size of the opening affects cyclone performance. Argentite: A silver sulphide mineral (Ag2S). The most important silver mineral in the ore. Barren Solution: The cyanide/lime process solutions that have had […]
Fire Prevention in Mineral Processing Concentrator Plant
A fire prevention and control program must have the understanding and the cooperation of every employee in order to be effective. Although the overall program is under the direction of the mine manager, each employee on the job does have a direct responsibility for the program. The mine manager, because of his knowledge of the operation, is […]
Hydrochloric Acid & Sodium Cyanide
Even a small concentration of hydrochloric acid in the air irritates the membranes of the respiratory tract making it easily detectable in amounts below the Threshold Limit Value of five parts per million. One to five parts per million can be detected by smell, while five to ten parts become disagreeable. In addition hydrochloric acid […]