Fine Screening
Fine screening, as discussed in this paper, pertains to the use of the Rapifine DSM Screen to make a 65 to 325-mesh separation at production tonnages. The greatest number of Rapifine Screen installations are in magnetic taconite plants where the unusual relationship between the grinding mill, cyclone classifier, magnetic separators, and fine screens makes the Rapifine […]
Dust Collection and Control in Crusher Plant
Crushing plant layout and ventilation system design for the Urad mine was based on our operating experience at similar crushing facilities located at the Climax operations. Low speed conveyors of generous width, adequate exhaust volumes at all ore transfer locations, large hoods and good conveyor skirting have made the Urad underground crusher dust control operations […]
Large Scale Mixer Settlers Design
This paper outlines the physical and mechanical factors which must be taken into account when designing mixer-settler systems for large scale solvent extraction plants. The performance of the equipment will also be dependent upon the chemistry of the system, including the kinetics and thermodynamics of the ion exchange reaction itself, the effect of impurities flocculants, […]
Mathematical Programming of Crushing Circuits
Crushed stone operations have become more difficult due to rising costs of labor and equipment, with the consequent reduction in profit margins. Competition from other operators and the encroachment of vertically integrated companies place severe restrictions on available markets. The seasonal demand for stone precludes any definite production level, and changes in productivity have to […]
Courier 300 On-Stream Analysis OSA
The Outokumpu Company’s Courier 300 System is a complete package that can be installed and handed over with the key. It includes the equipment needed for sampling and handling the slurries. It has been developed from the start to meet industrial demands. Obviously an on-line system must comply with far stricter standards than one designed […]
Conveyor Idlers Operating & Maintenance
Depending on the source of reference used, belts for handling bulk material underground came into being between 1900 and 1920, while strip mining appeared in the thirties. The conveyor belt speeds in that era were in the 300 fpm to 500 fpm range. Belt speeds of 600-700 fpm were in vogue in the fifties, and […]
Conveyor Belt Pulleys Design Features
In belt conveyor application, a pulley’s purpose is primarily three-fold, 1) support the belt in directional changes, as designed in the conveyor, 2) transmit driving power to the belt, and 3) guide or train the belt. The drive pulley imparts the driving force to the belt and may be located at the head or discharge […]
Conveyor Belt Drive Selection
The drive selected for any piece of machinery must adequately satisfy the application requirements both during the starting interval and at running conditions. All loading possibilities of the drive must be known and allowances made for any adverse limiting conditions such as extreme cold, or perhaps an intermittent excessive loading situation etc. Characteristics of the […]
Belt Conveyor Transfer Points
Belt conveyors have proven themselves for many years as a dependable and low cost method of handling bulk materials at high flow rates. The success of a belt conveyor system greatly depends on the initial loading of the material on the belt. If the material is loaded on the belt at the center, at approximately […]
Aerofall Grinding System
In any treatment process that requires a coarse feed material to be reduced to a fine size by crushing and/or grinding it must be determined whether a wet or dry comminution system should be utilized. All factors must be evaluated in reaching the decision. Among these factors are: Ecology and Plant Environment Operating Costs The […]