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Garfield Refining is a Philadelphia, Pennsylvania based refinery specializing in the purchase of precious metal, including gold, silver, platinum and palladium. The company was founded in 1892 and was originally called Eastern Smelting. [1] In 1928, it was purchased by the Garfield family.
Smelting is a process of applying heat and a chemical reducing agent to an ore to extract a desired base metal product. [1] It is a form of extractive metallurgy that is used to obtain many metals such as iron , copper , silver , tin , lead and zinc .
16th century cupellation furnaces (per Agricola). Cupellation is a refining process in metallurgy in which ores or alloyed metals are treated under very high temperatures and subjected to controlled operations to separate noble metals, like gold and silver, from base metals, like lead, copper, zinc, arsenic, antimony, or bismuth, present in the ore.
Pages in category "Companies based in Silver Spring, Maryland" The following 6 pages are in this category, out of 6 total. This list may not reflect recent changes .
Silver Spring is a census-designated place (CDP) in southeastern Montgomery County, Maryland, United States, near Washington, D.C. Although officially unincorporated, it is an edge city [3] with a population of 81,015 at the 2020 census, [4] making it the fifth-most-populous place in Maryland after Baltimore, Columbia, Germantown, and Waldorf.
In one of the previous melting stages, lead was added. Gold and silver preferentially dissolved in this, thus providing a means of recovering these precious metals. To produce purer copper suitable for making copper plates or hollow-ware, further melting processes were undertaken, using charcoal as fuel. The repeated application of such fire ...
Pages in category "Buildings and structures in Silver Spring, Maryland" The following 17 pages are in this category, out of 17 total.
In 2015, Bill LeRoy, the president of Ohio Precious Metals was named the company's CEO and the company changed its name to Elemetal. In March 2017, Juan P. Granda a former employee of NTR Metals, Miami was charged with buying gold from illegal mines in Peru. [ 1 ]
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