roasting smelting

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• Roasting (metallurgy) — Roasting is a metallurgical process involving gas solids reactions at elevated temperatures. A common example is the process in which sulfide ores are converted to oxides, prior to smelting. Roasting differs from calcination, which merely… …   Wikipedia

• Smelting — For other uses, see Smelt (disambiguation). Electric phosphate smelting furnace in a TVA chemical plant (1942) Smelting is a form of extractive metallurgy; its main use is to produce a metal from its ore. This includes iron extraction from …   Wikipedia

• roasting — roastingly, adv. /roh sting/, adj. 1. used or suitable to roast. 2. exceedingly hot; scorching: a roasting July. n. 3. a severely critical notice or review; pan. [1350 1400; ME (ger.); see ROAST, ING1, ING2] * * * In metallurgy, usually the first …   Universalium

• Zinc smelting — is the process of converting zinc concentrates (ores that contain zinc) into pure zinc. The most common zinc concentrate processed is zinc sulfide,Citation | title = Compilation of Air Pollutant Emission Factors | publisher = U.S. Environmental… …   Wikipedia

• pyritic smelting — noun : a process of smelting pyritic ores without previous roasting and with little or no fuel by utilizing the heat resulting from the combustion of their high sulfur content …   Useful english dictionary

• Pyrometallurgy — is a branch of extractive metallurgy. It consists of the thermal treatment of minerals and metallurgical ores and concentrates to bring about physical and chemical transformations in the materials to enable recovery of valuable metals.… …   Wikipedia

• copper processing — Introduction  use of smelting or leaching, usually followed by electrolytic refining or recovery, to turn the ore into a form from which products can be fashioned. Included in this article also is a discussion of the mining of copper and of its… …   Universalium

• pyrometallurgy — [pī΄rə met′ə lʉr΄jē] n. metallurgy using high temperatures, as in roasting, smelting, etc., for the extraction of metals from their ores …   English World dictionary

• metallurgy — metallurgic, metallurgical, adj. metallurgically, adv. metallurgist /met l err jist/ or, esp. Brit., /meuh tal euhr jist/, n. /met l err jee/ or, esp. Brit., /meuh tal euhr jee/, n. 1. the technique or science of working or heating metals so as… …   Universalium

• Copper extraction techniques — This article is about historical production methods. For modern methods, see Flash smelting. The Chino open pit copper mine in New Mexico …   Wikipedia

• Gold extraction — or recovery from its ores may require a combination of comminution, mineral processing, hydrometallurgical, and pyrometallurgical processes to be performed on the ore. [cite web url=http://geology.com/publications/getting gold/gold… …   Wikipedia