Bauxite Crushing & Phosphate Rock Processing
Three Reversible Impactors are located at the Piney Point Plant, Palmetto, Florida. This plant is part of the Davison Chemical Division of Borden Chemical Co. These machines reduce diammonium phosphate or granular triple superphosphate (GTSP) from a feed of 75 x 3.35mm (3″ x 6 mesh) to an 852-952 minus 3.35mm (6 mesh) product. Capacity […]
Crushing Circuit Process Control
As indicated in the introduction to this paper, it is a sequel to that which i gave to the last annual meeting in Atlanta in march, this paper goes further into aspects of crushing and screening, primarily from the standpoint of circuit control. By proper control over the use of crushing energy, we will be able […]
Belt Conveyors of Large Carrying Capacity Resistance to Motion
The frictional resistance to motion of a belt conveyor has always been a subject of intensive studies and research by engineers throughout the years. Numerous informations have been developed by analysing series of field tests on belt conveyors of different characteristics and carrying different materials at various capacities. Within certain limits of weight per unit length […]
Belt Conveyor Drives Factors & Selection
Conventional belt conveyors are powered by electric or electro-mechanical drives mounted at the conveyor’s head, tail, intermediate return span, or a combination of these. The following are main elements influencing the selection of the drive system: 1) dynamic characteristics, 2) economic factors such as capital cost, plant spares compatibility, reliability, availability, maintainability, and 3) environmental constraints. […]
How to Calculate the Size of Surge Bins
The purpose of a surge bin between two machines is to permit either of the two machines to continue production for at least some of the time while the other machine is interrupted by break down or by preventive maintenance or by other problems up or down the line. This results in a higher capacity […]
Conveyor Belt Service Machine
Design, fabricate, and test a machine capable of operating in coal seams 48-inches and thicker that can reduce the time, expense, and injury potential inherent in extending and retracting mine-wide section belt conveyors, while eliminating the need to use additional machinery or equipment in accomplishing such moves. The Problem Many underground coal mines use a […]
Vibratory Conveyors
Vibratory or oscillating conveyors can be found in all types of industry, handling virtually any granular bulk material. They can be combined with other process functions, such as screening, cooling, drying and de-watering, while conveying. The conveyor can be covered and made dust-tight. Although construction and installation is relatively simple, the engineering and design analysis […]
Vibrating Screen Design Parameters
An analysis of screen design options on the operating efficiency of secondary crushing plants has been conducted using a dynamic computer model. The model allows for the simulation of a wide variety of crushing circuits and can be run on either a microcomputer (IBM PC/XT) or a large time-sharing mainframe computer. Size reduction and separation […]
Portable Crushing
Decreasing ore grades and increasing labor and material costs have seriously eroded the economic vitality of many mining operations. Coupled with global economic stagnation and recession in the early 1980’s, these conditions have forced re-evaluation of operating strategies and methodologies with the objective of remaining competitive in a world marketplace. An important factor in system […]
In Pit Crushing and Conveying Systems
Belt conveyor systems, long the standard transportation technique in soft-rock open-pit applications, are encountering growing interest in the hard-rock open-pit sector as economic factors force companies to seek an alternative to costly truck haulage. A general review of mine conveyor systems is followed by detailed analysis of the mobile and semi-mobile in-pit crushing plant essential […]