The testing of tonnage lots of ores and industrial materials by continuous Mineral Processing Pilot Plant operation is in many instances advisable before a full scale milling plant is installed. The treatment of complex ores by new processes or by the use of new or unusual reagents in flotation may involve problems the effect of which should be studied under small scale continuous operating conditions.
The milling of ores by fine grinding and flotation requires the establishment of closed circuits where middling or unfinished products are returned to various points in the flowsheet for additional treatment. Where unusual flotation reagents are used, or when an intricate flowsheet is required, the effect on the operation is not satisfactorily determined from batch laboratory tests.
Commercial operation of the cyanidation process for the treatment of gold and silver ores involves the continuous re-use of much of the cyanide solution after removal of the dissolved gold or silver by precipitation. This introduces the problem of the dissolution of undesirable base metal salts especially when complex or partially oxidized ores are treated. These salts may build up in the solution and act as cyanicides to affect the rate of dissolution of the gold or silver by cyanide ….Read more