David Horizontal cyclones can reduce the quantity of fines in the cyclone underflow as described by Hochshied (1984). A number of plants are now operating horizontal cyclones with a substantial reduction of the circulating load and the amount of fines returning to the mill. However, circuit capacity did not increase due to the reduction of fines … Read more
This new high energy or power rate crushing brings a different perspective to comminution flow sheet selection. Generally, up until the early 1960’s the classical flow sheet for a beneficiation plant was primary crushing followed by two stages of cone crushing in closed or open circuit, making feed for rod mills, followed by ball mills. The … Read more
The Allis-Chalmers Corporation was founded in Milwaukee, Wisconsin, in 1847 as the E. P. Allis Company, which had an initial interest in manufacturing components in the grinding of flour. As such, its roots were started in reducing material size, which is covered by the generic term, comminution. The Corporation evolved by a series of mergers … Read more
Using this summary page you can locate Geological Maps from the MTO Online service in British Columbia to acquire Mineral Titles, Mining Claims. Mineral Title means a claim or lease acquired and maintained under the Mineral Tenure Act and its predecessor Acts (the Mineral Act and the Placer Mining Act) and these are by far the … Read more
Designed to provide quick, hassle free lining of blast holes on the go. Blast Hole Liners are securely packaged in convenient size packs which can be easily transported on site. Dispensing of liners down blast holes takes place speedily and effectively. Durable polyethylene material is abrasion resistant and watertight. Unique packaging method allows for efficient … Read more
Figure 125, A and B shows typical arrangements using floating gold washing and gold-saving plants (“boats”). Figure 125, C, is a plan of an operation where the gravel is first dug by a power shovel and is then picked up by a dredge equipped with a light bucket line. Where floating plants can be employed, … Read more
Hydraulicking: In hydraulic mining a stream of water under high head is employed to break down the bank and excavate the gravel and to sweep it to the sluices. Additional running water (termed “bank” or “by-wash” water) usually is required to wash it to and through the sluices. The gold is recovered in part from cleaning … Read more
The process to be presented makes use of a commercial mixture of highly-branched monocarboxylic acids with the trade name of “Versatic 10” (Shell). The formula may be presented as: where the total number of carbon atoms in the molecule is about 10. In short the Versatic acid will be termed RH. The organic acid RH … Read more
The first leaching step is the release of trace metals from the mineral phase due to sulfide oxidation. Sulfate was the ultimate reaction product in both the laboratory and the field, a result of the pH and oxidizing conditions which prevailed, and the relatively long reaction time. The rate of sulfide oxidation observed in batch … Read more
Purpose In the past several model studies of the behavior under load of both randomly (4) and regularly jointed rock masses have been published. The studies of regularly jointed masses involved block models composed of a large number of blocks of equal shape, such as square, hexagonal and parallelepipedal, both with continuous and discontinuous joints. … Read more