Altair Centrifugal Jig
During the past decade, several enhanced gravity concentrators have evolved to commercial scale as a result of the need to achieve efficient gravity-based separations for the treatment of ultrafine particles. The initial interest in enhanced gravity separators (EGS) was for the recovery of fine gold, which represents a low product flow rate application whereby the […]
DMS Conical Cyclones VS Cylindrical Dense Media Separator
According to the statement made above, in a conventional conical cyclone where both overflow and underflow discharges are axial, a free vortex should form. Actually, a combination of free vortex and forced vortex known as Rankine’s vortex forms. It basically consists of two parts as shown in Figure 3: a forced vortex (b) – equivalent […]
Increase Spiral Circuits Efficiency & Recovery
The reasons spirals have become so popular are fairly simple. Spirals are low cost and effective. The new lightweight molded and coated fiberglass units mean low added floor weight which minimizes required support steel. Incorporating multiple starts greatly reduces the required floor space so that more tons per hour can be processed in less building […]
Placer Prospecting
Placer Prospecting Practice Prospecting methods have been developed and well established within the last few years. Sinking pits and shafts generally gives good results, but this work is usually expensive and generally slow and troublesome, owing to the presence of water in most placer ground or to the necessity of timbering the shafts. With the […]
Hydraulic Mining Equipment
Hydraulic Mining Where it is practicable, this is the simplest and most inexpensive method of placer mining. The mechanical equipment requirements consist only of pipe lines and giants. One feature, however, that is frequently overlooked in hydraulic mining is the matter of dumping facilities. This should always receive careful consideration. It often happens that there […]
Placer Gold Dredges
Steam Electric Dredge There can be no question that the most efficient and economical method of operating a dredge is to have all the units electrically driven by individual motors and where electric power is available, the question of motive power presents no difficulty. Where such power is lacking and a self-contained steam driven dredge […]
Dredge Mining for Gold
A Modern Idea of Service Our present plant was designed and built by ourselves and we have also designed and built much of our special machinery in order to take care of the operations peculiar to our line of work. Our plant is electrically operated throughout and every modern method and apparatus has been installed […]
Hindered Bed Classifier Modelling
Significant research has been conducted in the past to evaluate the application of hindered-bed settling devices for achieving efficient particle size classification. However, recent studies have been devoted to the interest of using the hindered-bed devices as gravity-based separators for multi-species suspensions having wide density differences between the various particulate components. The ability to achieve […]
Hindered Settling Column
After filling the column with water, the teeter water flow rate was set to produce the desired cut size. The feed water was adjusted to produce a feed slurry consisting of about 50 percent solids by weight The screw-feeder was then set to the desired rate. Solids were fed into the feed tube and combined […]
Shaker Table Washability Curves
Although direct comparison of table performance with jig performance gives only a general idea as to the efficiency of tables, a better understanding of the subject can be obtained from a consideration of table efficiencies in relation to the washing difficulties reflected in the washability curves of various coals. Numerous methods of interpreting washability curves […]