Chemical metallurgy: principles and practice by Chiranjib Kumar Gupta

By Chiranjib Kumar Gupta

Chemical metallurgy is a good based and engaging department of the extensive box of metallurgy. This publication presents particular info on either the 1st steps of separation of fascinating minerals and the next mineral processing operations. The advanced chemical approaches of extracting quite a few components via hydrometallurgical, pyrometallurgical or electrometallurgical operations are defined. within the selection of fabric for this paintings, the writer made reliable use of the synergy of clinical ideas and business practices, supplying the a lot wanted and hitherto unavailable mixture of specified treatises on either compiled in a single e-book.

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Example text

The principle of the test is straightforward. The energy necessary to fracture a test sample piece is directly calculated from the difference in the initial and the final heights of the swinging pendulum of the Charpy machine. The test sample is notched. The notch essentially acts as a stress concentrator and thereby exerts a control over the fracture event. The sample is subjected to elastic deformation, plastic deformation and finally fracture, in succession, as if a tensile test proceeds rapidly to completion.

This, in turn, depends strongly on the prevailing market price for the product. Nonmetallic industrial minerals include those separated from source rocks such as diamonds and asbestos. They also include monominerallic deposits by themselves, such as beds of gypsum, salt and sulfur. Other nonmetallic minerals which the industry uses are feldspar, quartz, mica, spodumene, gemstones, fluorite, barite, magnesite, and many others. Of these, spodumene and magnesite can as well be regarded as metalliferous because they are also mined to extract lithium and magnesium respectively.

A mineral deposit of yesteryears which is not an ore deposit may become one today or in future years. This, of course, depends upon number of other factors. An ore is not just an aggregate of minerals, but must contain metallic minerals in such form and abundance that the metals can be profitably extracted, as indicated in the definition. A mineral such as molybdenite (MoS2) is always molybdenite, but a mineralised rock containing molybdenite may or may not be a molybdenum ore. The economics of extraction depends on a number of factors.

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