Pollution Reduction and Product Recovery by Centrifugal Dewatering
The requirements for controlling air and stream pollution are a most timely subject for all concerned people. The coal industry has taken great measures to reduce both types of pollution. To help eliminate stream pollution and the hazards created by tailing ponds, the coal industry is using centrifugal dewatering equipment. Use of centrifugals to dewater […]
Batac Jig for Cleaning Fine and Coarse Coal Sizes
The cleaning of coal by the use of jigs is one of the oldest methods of separating coal from its impurities. Although in many situations jigs have been replaced by other methods, by far the largest percentage of coal today is still being cleaned by some form of jigs. Description of the Batac Jig In […]
Add Steel to Convert AG Autogenous Mill SAG Mill
Metallurgical evaluation of autogenous grinding of Anaconda’s Berkeley Pit ores indicated that tonnage throughput increases, at a finer flotation feed size, were possible by converting autogenous mills to steel ball mills. In addition, initial test work showed that the improved grind resulted in slight recovery gains in subsequent flotation processing. Operation of the Autogenous Mills […]
Submerged Vat Leaching VS Trickle Leaching
Leaching is defined as a form of extraction in which a valuable constituent is removed from a solid body by mass transfer to a solution which, for the purpose of this discussion, is considered to be an aqueous medium. Historically, leaching has been applied to the recovery and purification of many elements. The leaching of copper […]
Sublevel Caving
Sublevel caving has created through its possibilities of standardizing and mechanizing operations and equipment. Other advantages are that the method can be adapted to orebodies of different shape, size, strength etc., and especially that working conditions can be made safe and relatively comfortable since all work is carried out in drifts. As is well known, the […]
Storage of Sulphide Bearing Tailings
The problem is typified in the tailings of the uranium operations of Elliot Lake, Ontario, where mining started some 20 years ago. The approach to tailings disposal paralleled the practice for other hydrometallurgical plants treating gold and base metal ores. Impoundment areas were designed to retain solids, and a clear and neutral overflow was considered […]
Solvent Extraction of Uranium using a Gas-Bubble Extractor
Solvent extraction is widely used in hydrometallurgical processing of uranium for purification and upgrading leach solutions prior to recovery of metal values. Conventional solvent extraction processing utilizes mixer-settler units to achieve mixing of the aqueous and organic phases. Use of mixer-settlers permits continuous treatment of feed, but the processing rate is restricted by the time […]
Size Reduction Mineral Liberation Model
Success has been achieved in developing mathematical models of rod mills, ball mills and recently to a limited extent autogenous grinding mills. There is also considerable activity in the development of mathematical models of various mineral concentration operations, such as flotation, magnetic separation and electrostatic concentration. However, at present there is a technological gap which hinders […]
Overcome Environmental Problems in Sinter Plants
The continuous sintering process was invented more than 60 years ago by two metallurgists, Arthur S. Dwight and Richard L. Lloyd, who saw a need for automation in mineral processing. Their specific objective was to beneficiate copper ore by desulfurizing and agglomerating it for copper blast furnace smelting at the Cananea plant in Mexico. Since […]
How to Scale-up a Hydrometallurgical Leach Recovery Process
Several hydrometallurgical leach processes have been recently proposed for the recovery of copper from copper concentrates. These include the Cymet Process of Cypress Metallurgical Processes Corporation, the Arbiter Process of the Anaconda Company, and the Treadwell Process of Treadwell Engineering Company. These processes and similar processes for recovery of other minerals, have several phenomenological similarities […]