Types of Agitators
TURBINE TYPE AGITATORS Design of new Turbine Type Agitator Propellers makes possible the use of positive propeller agitation in larger diameter tanks compared with higher speed agitators. One large diameter agitator handles volume of several small ones. Saves space, operating expense, supervision and maintenance. Large size of propeller and tank permits operation at slower speeds […]
Small Mineral Processing Plant Design
Every ore is distinctive and presents its own individual problems in profitable mineral recovery. 911Metallurgy’s experience in treating the many different ores submitted to our laboratories assures the development of the best treatment with most economical and profitable recovery. This will prevent any “weak links” and makes your mill make money. 911Metallurgy strives to develop the […]
Flotation Bubble Surface Compression
At the meeting of the local membership of the American Institute of Mining Engineers on December 14 last the question was asked by one of the speakers: “Why does the greased needle float on the surface of a tumbler of water and the wetted needle sink?” Did one or another of the experts present rise […]
Flotation of Arizona Copper Ore
For some time past the company has been experimenting with a view to finding the best method of concentrating the sulphide ore before smelting. The first test-mill consisted of two sets of rolls, one Chilean mill, one Hardinge conical mill 6 ft. diam. by 12 in. cylinder, Richards hindered-settling classifier, Deister tables, some kind of […]
Open Stope Mining Method
Speaking generally, in the Open Stope Mining Method, the jasper hanging walls of most of the deposits in the Iron River district dip at a steep angle and are exceedingly strong, standing without caving, even after mining has been continued for years and after large excavations have been made. The ore is fairly hard and […]
Gold Leaching Process
Many opportunities exist throughout the world for small cyanide plants, possibly using a Gold Leaching Process, both for production and pilot operations, especially in areas not easily accessible, and where labor and local costs are on a level for profitable operation. Ores not fully amenable to treatment by amalgamation or flotation processes for the recovery of […]
Copper and Pyrite Separation by Selective Flotation
The Problem with copper-pyrite ores This flowsheet, is designed for the treatment of a copper-iron sulfide ore containing appreciable values in gold. The major portion of the gold is associated with the copper but the pyrite contains appreciable gold values also. The demand for pyrite for sulphuric acid also gives added incentive for the recovery […]
Effects of Soluble Metals Flotation
In concentration by flotation, the soluble components of an ore may play an important role. Occasionally ores that are shown by preliminary test to be unsuitable for flotation may be treated by the process after the soluble ingredients have been removed by decantation. On the other hand, excellent results may be obtained on certain ores […]
Preferential Flotation
‘Preferential’ flotation is a specialized application of the flotative principle in the separation of minerals from their ores. It gained its first wide use as a name for certain methods of floating minerals in connection with the Horwood process mentioned below. ‘Selective’ flotation has come to mean (by common consent) the flotation of valuable minerals […]
Flotation Flowsheets
Typical flotation flowsheets may be classified into two general types on the basis of the part which flotation plays in the mill treatment scheme and each of these classes may be again sub-divided on the basis of the method of routing the pulp through the flotation machines. On the first basis, a flow-sheet is of the “primary” type when […]