Hydraulic Classifiers
Hydraulic classifiers range from simple V-shaped launders with a multiplicity of shallow settling pockets for the discharge of as many roughly sized products to the more elaborate deep-pocket machines of the hindered- settling type, having specially designed construction plates and automatic discharge of spigot products. Dorrco Sizer In the eight-pocket machine, the pockets are separated […]
Ore Sorting & Pre-Concentration
Ore Sorting helps the economics of mining when ore becomes diluted by country rock because of narrow slopes or because of weak wall rock, or when it naturally contains barren material which is distinguishable from the ore, sorting and rejecting the worthless rock may be economical. This is done in a casual manner at some […]
Crushing & Screening Plant
Methods used in Crushing & Screening Plants on ore range from a simple combination of a grizzly and one crusher to an elaborate arrangement in series of grizzly, jaw crusher, screens, and rolls or cone crushers. Crushing is done underground at a few large mines. In general, the jaw crusher is the most suitable primary machine, yet […]
Flotation Tests with Homemade Flotation Equipment DIY
By modelling the basic flotation equipment from the early 1900’s you see that most can hobby prospectors can build or assemble basic froth flotation equipment using all the machines and concepts explained below and perform home-based flotation tests. Although the subject of testing for flotation has been well presented in T. J. Hoover’s book on […]
Flotation Residue Disposal
There are many methods of handling sand and slime from metallurgical operations, but in this article the draining and conveying of waste products from flotation processes will be specially dealt with, the methods given being those in use at the leading flotation plants in Australia. DRAINING AND DEWATERING It is generally advisable to thoroughly dewater […]
Analytical Methods for Total Cyanide Assay Determination
SCOPE AND APPLICATION The method is designed to determine the concentration of total cyanide in aqueous/water and soil/sediment samples taken from hazardous waste sites. SUMMARY OF METHOD Aqueous/Water and Soil/Sediment The cyanide as hydrocyanic acid (HCN) is released from cyanide complexes by means of a reflux-distillation, using either a midi- or micro-distillation process, and absorbed […]
Flotation Plant VS Laboratory
Ore, Rock & Aggregate Screening (Complete Guide)
A-Z Guide to Screening Ore, Rock & Aggregate A simple definition of a “screen” is a machine with surface(s) used to classify materials by size. Screening is defined as “The mechanical process which accomplishes a division of particles on the basis of size and their acceptance or rejection by a screening surface”. Knowledge of screening comes […]
Diesel Engines
The information below is provided as representative of medium HP Diesel engines of four, six, and eight cylinders. Many other sizes and types are available and variations on four, six, and eight cylinder engines, such as in stroke, bore, and displacement—giving higher or lower HP ranges, may be obtained. Performance Curves are for maximum, rated, […]
Determining Power Factor
Where power is purchased, and is billed on a power factor basis, the installed power company meters will provide a means of determining overall plant power factor. This may be the average power factor for the billing period, usually a month, or the power factor at time of maximum kilowatt demand, or other values depending […]