Search results
Results from the WOW.Com Content Network
Argonoxygen decarburization (AOD) is a process primarily used in stainless steel making and other high grade alloys with oxidizable elements such as chromium and aluminium. After initial melting the metal is then transferred to an AOD vessel where it will be subjected to three steps of refining; decarburization , reduction , and desulfurization .
It allows to process metals at moderate temperatures in a non-aqueous environment which allows controlling metal speciation, tolerates impurities and at the same time exhibits suitable solubilities and current efficiencies. This simplify conventional processing routes and allows a substantial reduction in the size of a metal processing plant.
The enterprise developed what has become known as the Creusot-Loire Uddeholm (CLU) converter process, which was developed to minimize the need of argon, and which was first erected on an industrial scale in the 1970s at Degerfors. [5] The group was affected by the 1970s steel crisis, [3] and was not able to pay a dividend after 1977. [6]
Open pit copper mine Skouriotissa in Cyprus.. According to data released by the statistical service of the government for the year 2011, mining and quarrying sectors produced a total value of €79.5 million ($105.3 million), which reflected a drop of €46.4 million ($61.4 million) in value-added products, such as finished metal works.
Metallurgy derives from the Ancient Greek μεταλλουργός, metallourgós, "worker in metal", from μέταλλον, métallon, "mine, metal" + ἔργον, érgon, "work" The word was originally an alchemist's term for the extraction of metals from minerals, the ending -urgy signifying a process, especially manufacturing: it was discussed in this sense in the 1797 Encyclopædia ...
A Treatise on Metallurgy, including vol. i. On Fuel, Copper, Zinc, and Brass; vol. ii. On Iron and Steel, 1864, 2nd edition 1875; vol. iii. On Lead, 1870; and vol. iv. On Silver and Gold, 1880. His 1851 survey resulted were embodied in the volume on Iron and Steel. This treatise was the first work of its kind written in modern times.
De regno, ad regem Cypri (Latin: On kingship, to the king of Cyprus) is a political treatise by Dominican friar Thomas Aquinas written between 1265 and 1266. Dedicated to king Hugh II of Cyprus , the work was left unfinished due to the premature death of the ruler.
Metallurgy: A process involving the separating and refining of metals from other substances; [4] Bioleaching: Using biological agents (bacteria) to extract metals or soils; [ 5 ] general term used to encompass all forms biotechnological forms of extraction ( hydrometallurgy , biohydrometallurgy, biomining , etc)