Flotation Cells Design & Operating Characteristics
Qualitative Aspects In its essentials, a flotation cell must provide for two main functions. First, it must supply air adequate in quantity and quality for satisfactory process kinetics. Air quantity can be defined on the basis of the narrow range provided in major U. S. commercial cells, for escape velocity, which averages near 1.2 m/min […]
Flotation Circuit Automation
Flotation circuit designs are also being influenced by operating philosophies possible with computer automation. It has been pointed out that flotation flowsheets tend to be simplified through use of online control. Logical control capability can reduce the necessity for recirculating streams, bringing circuits into open circuit mode with little or no metallurgical losses. Control techniques […]
Flotation of Pyrite
This paper is a record of the first of a series of tests on sulfide minerals to be made by the metallurgical department of the University of California. The purpose of the tests here recorded is to determine the action of standard oils, oil mixtures, and addition agents on the flotation of pyrites. The question […]
How Particle Size Affects Flotation
There is a marked particle size effect on both R and K. Table V gives an example of increasingly finer grinds in flotation with a different sulfide ore blend. Within the times of grind indicated, there is a tendency for both the over-all R and K values to increase with finer grind [see also Table […]
Native Gold Flotation
The surfaces of native or free gold containing particles are normally hydrophobic and, if the surfaces of such particles are relatively free of contaminants they will have a tendency to float without the addition of a collector. The major sources of contamination on free gold particles are processing chemicals and small particle slime coatings. Gold […]
How Frother Affects Flotation
At otherwise constant conditions, the prediction of R and K trends with increasing frother concentration is difficult and not uniform in nature. This is due, in part, to the observation that the pure concentration effect of a given frother on R and K is often dominated by interactions with particle size, collector type, pH, degree […]
“Wood” Flotation Process & Machine
In my opinion, the concentration of minerals by flotation is the most interesting problem in ore-dressing, and will command eventually far more consideration than it has at present. For many ores it furnishes a complete method of concentration absolutely independent of specific gravity, and thus simplifies the milling of many difficult combinations. Not having to […]
How Collector Affects Flotation
It appears from all tests run to date that under otherwise constant conditions, increasing the concentration of a given collector increases R and decreases K in a uniform manner. This appears to be true for all collector types and is supported, e.g. by the data of Tables III and IV as well as Figure VIII […]
Arsenopyrite Flotation and Arsenopyrite Rejection
Flotation and depression control of arsenopyrite through pH and xanthate as the collector. Arsenopyrite Rejection
Mineral Flotation: Principles and Applications
This is an overview of setting up and conducting a flotation rate test. The test is a means of determining the flotation characteristics of an ore. It is conducted in a laboratory scale cell usually with a volume of two point five litres. The intention is to generate relationships of cumulative recovery, mass pull and […]