from The Century Dictionary and Cyclopedia
- n. In mining, the mechanical treatment of ores by processes depending on physical laws and physical properties of minerals, such as specific gravity, magnetic or electric properties, etc. The principal objects of ore-dressing are the concentration of low-grade ore, the purification of ores by the removal of objectionable material, and the separation of two or more useful minerals occurring in the same ore in order to render each more valuable.
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Dry stamping may be said to be almost a necessity in dealing with these rich silver ores, as with the employment of water there is a great loss of silver, owing to the finer particles being carried away in suspension, and thus getting mixed with the slimes, from which it is exceedingly difficult to recover them, especially in those remote regions where the cost of maintaining large ore-dressing establishments is very heavy.
To prove this, it need only be remembered that the working expenses of a mine are of two sorts: one is a factor of the tonnage handled, such as stoping and ore-dressing; the other is wholly or partially dependent upon time.
He pursues methods in ore-dressing at which those who are trained in the usual practice may well stand aghast.
An arrangement for such a jarring motion is commonly found in various ore-dressing machines, where the object is to move fragments of matter over a sloping surface.
AMD 222,4 million worth taxes were paid by Akhtala ore-dressing plant;