Vor-Siv Dewatering & Classifying Device
The Vor-Siv Dewatering and Classifying Unit was developed by the Polish Coal Industry because of a need for a unit that would dewater and classify high volumes of solids in water slurry. To be practical, the unit needed to be relatively small in size, simple in design, involve low operating costs, and be able to […]
Heavy Media Selection Functions Circuit Analysis
Current coal cleaning technology uses heavy media (HM) for the recovery of coal in particles larger than 1/16 of an inch. Through the use of float sink measurements of the feed and products to commercial HM unit operations, a selection function, sometimes called Tromp curve in the coal industry, can be computed. Samples respectively from […]
Density Separator – Classification and Particle Size
The Density Separator is basically a hindered settling classifier with automatic control features that provide steady, sharp classification irrespective of extreme variations in dry tons per hour of feed solids up to the design maximum throughput for the particular material being treated. The Density Separator is a hydraulic classification device consisting of an upper parallel-walled […]
Photometric Ore Sorting
The primary objective of ore sorting is the separation of mineralized ore from waste or low-grade material, early in the concentration cycle. The concept of applying automated ore sorting techniques has been recognized for same years, but limitations in technology has meant that, until recently, manual sorting was the oily practical sorting technique available. The […]
Large Vibrating Screen Design & Maintenance
Large vibrating screens represent a unique challenge for Manufacturers, Plant Designers, and Plant Operators. The inherent mode of operation for vibrating screens is self-destructive. More often than Manufacturers admit, Designers plan for, or Operators staff for, a vibrating screen succeeds and self-destructs. This is a problem. It can magnify with larger vibrating screens. Design and […]
Hydrosizing Industrial Minerals
The unit consists of an elongated box set on end, with the height being approximately 3 to 4 times greater than the base width. A baffle plate is secured inside the box at the bottom and sides and at an angle so as to leave a small opening at the top. The baffle rises to […]
Ultrafine Separation by Hydrocyclones
Over the past quarter of a century, the success of the hydrocyclone as a classifier in closed circuit grinding installations has permitted the introduction of the cyclone into virtually all fields of wet industrial processing. Research and experience gained in these applications have established the optimum cyclone sizes and designs necessary to provide the required […]
Large Screen Unit Design
The trend in new process plant design is moving towards the multi-screened large capacity modular design. As a result, multiplicity of process equipment will be minimized by the use of fewer, but larger units of higher capacity, or units specially designed for such circuits. One of the essential pieces of equipment in any process plant […]
Derrick Screens
General widespread interest in fine coal cleaning circuits did not occur in the United States until the mid 1960’s. Up until this period the relatively low price for which bituminous coal was sold did not justify for many operators the capital and maintenance costs associated with the beneficiation and drying of fine coal. However, with […]
Overflow to Underflow Flowrate Effect on Dense Medium
In the dense medium cyclone separation of coal, the overflow to underflow (O/U) flowrate ratio has not been considered as a major parameter in correlation with the cyclone performance, since it is not directly adjustable. It is a common practice in the optimization of cyclone performance, however, to stipulate the range of cyclone orifice diameter […]