|
Holt-Dern Method
The Holt-Dern process is method by which silver and gold can be extracted from low-grade ores. This book appears to be in the public domain as a work of the United States government. The method was applied in mining at Park City, Utah and in the Tintic Mining District, specifically at the Tintic Smelter Site. It was named for George Dern George Henry Dern (1872–1936) was an American politician, mining man, and businessman. He co-invented the Holt–Dern ore roasting process and was United States Secretary of War from 1933 to his death in 1936. He also served as the sixth Gov ... and T.P. Holt. References {{reflist Chemical processes Mining techniques Smelting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Public Domain
The public domain (PD) consists of all the creative work A creative work is a manifestation of creative effort including fine artwork (sculpture, paintings, drawing, sketching, performance art), dance, writing (literature), filmmaking, and composition. Legal definitions Creative works require a cre ... to which no exclusive intellectual property rights apply. Those rights may have expired, been forfeited, expressly waived, or may be inapplicable. Because those rights have expired, anyone can legally use or reference those works without permission. As examples, the works of William Shakespeare, Ludwig van Beethoven, Leonardo da Vinci and Georges Méliès are in the public domain either by virtue of their having been created before copyright existed, or by their copyright term having expired. Some works are not covered by a country's copyright laws, and are therefore in the public domain; for example, in the United States, items excluded from copyright include the for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Park City, Utah
Park City is a city in Utah, United States. The vast majority is in Summit County, and it extends into Wasatch County. It is considered to be part of the Wasatch Back. The city is southeast of downtown Salt Lake City and from Salt Lake City's east edge of Sugar House along Interstate 80. The population was 8,396 at the 2020 census. On average, the tourist population greatly exceeds the number of permanent residents. After a population decline following the shutdown of the area's mining industry, the city rebounded during the 1980s and 1990s through an expansion of its tourism business. the city brings in a yearly average of $529.8 million to the Utah Economy as a tourist hot spot, $80 million of which is attributed to the Sundance Film Festival. The city has two major ski resorts: Deer Valley Resort and Park City Mountain Resort (combined with Canyons Village at Park City) and one minor resort: Woodward Park City (an action sports training and fun center). Both Deer Valley ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tintic Smelter Site
The Tintic Smelter Site, located off U.S. Route 6 near Silver City, Utah, United States, that is listed on the National Register of Historic Places (NRHP). Description The site is one of few legacies of historic Silver City, a mining boom town in the 1870s. The site is described as being an "approximately five acre site containing slag and tailings dumps, as well as remnants of the concrete foundations of the Tintic Smelter and Tintic Mill." The Tintic Smelter was "built in 1908, dismantled in 1915, and replaced that year by the Tintic Mill. It was described as significant for aiding "in the documentation of the history of smelters and mills in Tintic Mining District. The Tintic Smelter, built by Jesse Knight, was constructed to combat high smelting rates of the 1908 period; and it resulted in lower rates by Salt Lake Valley smelters. The Knight-Dern Mill (Tintic Mill) was built as a joint venture by Jesse Knight and George Dern (Utah Governor, 1925-1933, and Secretary of War ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Dern
George Henry Dern (1872–1936) was an American politician, mining man, and businessman. He co-invented the Holt–Dern ore roasting process and was United States Secretary of War from 1933 to his death in 1936. He also served as the sixth Governor of Utah for eight years, from 1925 to 1933. Dern was a progressive politician who fought for tax reform, public education, and social welfare. He was the grandfather of actor Bruce Dern and great-grandfather of Laura Dern. Early life George Henry Dern was born in Dodge County, Nebraska, on September 8, 1872. He was the son of John Dern, a pioneering Nebraska farmer, mine operator, and industrialist, and Elizabeth, whose maiden name was the same as her married name, Dern. His parents were German immigrants. John was president of the Mercur Gold Mining and Milling Company and no doubt had a profound influence on George, who would follow in his father's footsteps when he entered the mining business. Dern graduated from Nebraska's Frem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemical Processes
A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be simple substances (substances consisting of a single chemical element), chemical compounds, or alloys. Chemical substances are often called 'pure' to set them apart from mixtures. A common example of a chemical substance is pure water; it has the same properties and the same ratio of hydrogen to oxygen whether it is isolated from a river or made in a laboratory. Other chemical substances commonly encountered in pure form are diamond (carbon), gold, table salt ( sodium chloride) and refined sugar ( sucrose). However, in practice, no substance is entirely pure, and chemical purity is specified according to the intended use of the chemical. Chemical substances exist as solids, liqu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mining Techniques
Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef, or placer deposit. The exploitation of these deposits for raw material is based on the economic viability of investing in the equipment, labor, and energy required to extract, refine and transport the materials found at the mine to manufacturers who can use the material. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay. Mining is required to obtain most materials that cannot be grown through agricultural processes, or feasibly created artificially in a laboratory or factory. Mining in a wider sense includes extraction of any non-renewable resource such as petroleum, natural gas, or even water. Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
