Phosphate Flotation
The phosphate-bearing formations in the West constitute relatively thick beds of phosphatic sandstones and shales that can be mined on a large scale employing open pit methods. The mineralogical characteristics vary considerably and require various treatment conditions for specific areas. For Phosphate, flotation is, in general, very important to upgrading the phosphate rock and is employed in […]
Different Types of Flotation Cells
Flotation is both a science and an art. It brings together many complex variables. Such basic factors as knowledge of mineral structure, chemical reagents, pH of mill water, pulp density, temperature, technical skills of the operator, the dependability of the flotation machine, as well as a host of other factors which affect the flotation of […]
LPF Process Metallurgical Testing
EXECUTIVE SUMMARY A Metallurgical Laboratory had completed preliminary economic studies on various processing options applicable to the Minerals Project in South America, containing oxide, transition and sulfide ore reserves. These included heap leaching with SX-EW; use of Roast-Leach-EW of sulfide concentrates to produce CuSO4 crystals; and potential application of the Leach-Precipitation-Flotation (LPF) option to treat […]
Copper Flotation
Although basic porphyry copper flotation and metallurgy has remained virtually the same for many years, the processing equipment as well as design of the mills has continually been improved to increase production while reducing operating and maintenance costs. Also, considerable attention is paid to automatic sensing devices and automatic controls in order to assure maximum […]
Effect of Cyanide on Depression of Sulphide Minerals
At the dosage of collector (not shown but relatively low), it is indicating galena will not float above pH 10.4, and it is not affected by NaCN. What you have to be careful about is that these lines all move if you increase or decrease the collector dosage. For example, you can get pyrite to […]
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 […]
Tungsten Metallurgy
Nearly all alloy steels containing tungsten are made in the electric furnace where tungsten is introduced to the steel’s metallurgy in the form of ferro-tungsten. Ferro-tungsten, melts between 3500 and 3700 degrees F., while tungsten powder melts between 6000 and 6200 degrees F. Neither will actually melt in a steel-making furnace, but the ferro-alloy because […]
Titanium Ore Processing and Beneficiation
To develop a flowsheet for separation of high grade titanium-rutile from ilmenite, that will meet market requirements. Rutile has a SG of 4.2, hardness 6.0 to 6.5 and is non-magnetic; while ilmenite has a SG of 4.5 to 5.0, hardness of 5.0 to 6.0, and is weakly magnetic. Both minerals are amenable to gravity concentration. Titanium, “the […]
Processing Spodumene by Froth Flotation for Lithium
Spodumene theoretically contains 8.03% Li2O and therefore the production of this mineral is greatly increasing because of the expanded use of lithium in the manufacture of high temperature insoluble lubricants, ceramics, pyrotechnics, non-ferrous welding fluxes, air purifying agents, and hydrogen isotopes. Extracting Lithium from its Ore The problems of spodumene mineral dressing depend on the […]