Flocculant Mixing Strength
A Flocculant like the Dry polymer (Percol 156) is used throughout the process to flocculate fine particles and increase the solids settling, filtration and clarification rates. Flocculant is prepared and aged in the skid mounted automatic flocculant mixing system. A control panel for the system is mounted on the same skid. Refer to the equipment manufacturer’s […]
Lime Addition System
The lime system is a packaged unit which operates automatically and continuously. The equipment provided in the package includes the lime silo, rotary feeder, lime slaker and lime slurry mix tank and agitator. The lime system is equipped with its own PLC which automatically provides lime slurry for the process. Hydrated lime is stored in a […]
Effect of Operating Variables on Metallurgical Process
VARIABLE RANGE EFFECT ON PROCESS Crushing Jaw Crusher Close side setting 3″ plus H – Material too large for cone crusher. N – 3″ L – Reduction in capacity. Excess power draw. Cone Crusher Close side setting 3/8″ – 1″ H – Increased circulating load of screen and cone. N – 1/2″ L – Increased power consumption, decrease […]
Gold and Silver Refining
In our EXAMPLE precipitate from the – Zinc Precipitation Circuit will be considerably wet and therefore it must be dried prior to entering the induction furnace. Excess moisture in the precipitate essentially wastes energy; as energy is required to evaporate the water before the precious metals and fluxes are melted. In addition, water not only wastes energy […]
Merrill-Crowe Zinc Precipitation Startup and Shutdown
The Operation of a Merrill-Crowe Zinc Precipitation circuit requires for Preparation for its Startup that the following items be checked before the equipment in the Merrill-Crowe Zinc Precipitation Circuit is started. Note the levels in the pregnant solution, clarified solution and barren solution tanks. The pregnant and barren solution tanks should be approximately half full. If the pregnant solution tank is full […]
Merrill-Crowe Zinc Precipitation Circuit Operation
In the Merrill-Crowe Zinc Precipitation, the pregnant solution tank collects the gold and silver bearing solution recovered from other circuits of the plant: thickener overflow; primary and secondary filtration? and the Argentite circuits. Normally these solutions contain very little solids content (15-100 ppm), however, even this small amount of solids is sufficient to inhibit efficient […]
Silver Sulphide Leaching & Filtration Circuit Startup & Shutdown Procedures
Details of good silver sulphide leaching and filtration circuit operation and instructions for sequencing and preparing for startup. The following items must be checked before the equipment in this EXAMPLE Argentite Leaching Circuit is started. The leach tank agitators should be running. Check that the Argentite filter feed pump, drum filter, repulper and tailings sampling pump […]
Silver Flotation Concentrate Leaching and Filtration Circuits
Producing a Silver Flotation concentrate from this EXAMPLE Argentite (cubic silver sulfide (Ag2S)) Flotation Circuit enters the first of four successive Argentite leach tanks. The purpose of this leach circuit is to dissolve the silver and gold recovered in the Flotation Circuit. A high strength solution of sodium cyanide, air, and lime are added to the […]
Flotation Circuit Startup and Shutdown Procedure
In preparation for this EXAMPLE Startup, the following items must be checked before the associated conditioning and flotation equipment and circuit is started. Ensure that all applicable reagent systems are operational, and that the conditioning tank agitators, flotation feed pumps, flotation mechanisms, flotation blower, and the rougher concentrate, cleaner tails, and argentite leach feed pumps are operational. The samplers […]
Silver Mineral Argentite Flotation Circuit
Solid residue from the second filtration stage is repulped with reclaim water to 35% solids, and is pumped to our EXAMPLE Conditioning and Argentite Flotation Circuit which is a process for the recovery of this Silver Mineral. A large portion of the silver in the ore will not have been leached in the initial grinding and […]