The unit consists of two rotary carriers between which there is a mounted series of independently rotatable slurry receiving baskets which are circumferentially spaced and, therefore, during rotation of the carrier, orbit about the axis of rotation of the carrier. The speed of the rotating carrier plates determines the centrifugal force available, while the speed … Read more
Nickel ores may be classified into two major categories : sulphide ores, and oxidized lateritic ores, these latter containing nearly 80% of the known reserves of the metal. Unfortunately, no economically viable process for the concentration of nickel from low-grade deposits has yet been developed, and so only the high grade ores are able to be … Read more
You have all seen a gas stove. Gas burns with tiny, bright-blue cones of flame; they are very hot, very clean, very quick to burn. You have also seen a hardwood fire; when the yellow flame disappears, the charcoal gives off a bright blue, almost transparent flame. Again, this flame is hot, very clean, very … Read more
The processing of residues derived from various operations in the mining and metallurgical industry for by-product recovery is becoming more prevalent. A principal target for by-product recovery is flue dust produced by conventional smelting operations. Flue dust from zinc smelters has been processed for many years for the recovery of cadmium. The cadmium recovery technique … Read more
A new suspension electrolysis method has been developed, which enables without any gas or dust pollutants a direct anodic extraction of zinc from zinc sulfide concentrates, while simultaneously oxidizing sulfide sulfur to elemental sulfur. The investigations were performed in a laboratory scale electrolytic cell with suspended zinc sulfide concentrate particles with or without graphite powder … Read more