final slag formation
71Leblanc process — The Leblanc process was the industrial process for the production of soda ash (sodium carbonate) used throughout the 19th century, named after its inventor, Nicolas Leblanc. It involved two stages: Production of sodium sulfate from sodium… …
72Pyrometallurgy — 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.… …
73Battle of Helsingborg (1710) — A first Battle of Helsingborg was fought 1362 Infobox Military Conflict conflict=Battle of Helsingborg partof=Great Northern War caption=German copperplate depicting the battle. (Krigsarkivet) date=February 28, 1710 place=Helsingborg, Sweden… …
74Lackawanna Steel Company — Infobox Company company name = Lackawanna Steel Company company company type = Public genre = foundation = 1840 founder = George W. Scranton, Seldon T. Scranton, William Henry location city = Scranton, Pennsylvania (1840 1902) Lackawanna, New… …
75Luxembourg — /luk seuhm berrg /; Fr. /lyuuk sahonn boohrdd /, n. 1. a grand duchy surrounded by Germany, France, and Belgium. 422,474; 999 sq. mi. (2585 sq. km). 2. a city in and the capital of this grand duchy. 78,400. 3. a province in SE Belgium: formerly a …
76metalwork — metalworker, n. /met l werrk /, n. objects made of metal. [1840 50; METAL + WORK] * * * Useful and decorative objects fashioned of various metals. The oldest technique is hammering. After с 2500 BC, casting was also used, molten metal being… …
