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List Of Articles : E |
Electrolysis
An electric current is passed through a solution containing dissolved metals causing the metals to be deposited onto the negatively charged cathode.
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Electrolytic Refining
The process of purifying metal plates that are suspended as anodes in an electrolytic bath. The valuable metal is plated onto refined sheets called cathodes of the same metal which act as starters.
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Electrostatic precipitator
Electrostatic precipitators are used to remove fly ash from the gases prior to the release from a power plant's flue gas stack.
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Electro-winning
The removal of precious metals from solution by the passage of current through an electro-winning cell. A direct current supply is connected to the anode and cathode. As current passes through the cell, metal is deposited on the cathode. When sufficient metal has been deposited on the cathode, it is removed from the cell and the sludge rinsed off the plate and dried for further treatment.
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Elution
Recovery of the gold from the activated carbon into solution before zinc precipitation or electro-winning.
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Entry
An underground horizontal or near-horizontal passage used for haulage, ventilation, or as a mainway; a coal heading; a working place where the minerals are extracted from the seam in the initial mining; same as ‘gate’ and ‘roadway,’ both British terms.
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Evaluation
The work involved in gaining a knowledge of the size, shape, position and value of the target mineral.
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Exploration
The search for mineral deposits and the work done to prove or establish the extent of a mineral deposit. Alt: Prospecting and subsequent evaluation.
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Explosive
Any rapidly combustive or expanding substance. The energy released during this rapid combustion or expansion can be used to break rock.
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Extraction
The process of mining and removal of cal or ore from a mine.
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