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Quern stones were used in China at least 10,000 years ago to grind wheat into flour. The production of flour by rubbing wheat by hand took several hours. [8] Due to their form, dimensions, and the nature of the treatment of the surfaces, they reproduce precisely the most ancient implements used for grinding cereal grain into flour.
Mo (Chinese: 磨; pinyin: mò; lit. 'mill') [1] [2] were stone implements used for grinding wheat in ancient China. [1] [2] It was a rotary quern millstone powered by a hand-operated crank fixed at the top to grind and pulverize grains, wheat, and rice into flour.
According to de Barry, the oldest circular stone millstone was unearthed in the ruins of the town of Olynthus: it was the millstone of an oil mill, not a flour mill. Historians Marie-Claire Amouretti and Georges Comet [17] point out that these millstones pre-date the earliest known examples of circular grain mills. So it was probably through ...
SAG is an acronym for semi-autogenous grinding. SAG mills are autogenous mills that also use grinding balls like a ball mill. A SAG mill is usually a primary or first stage grinder. SAG mills use a ball charge of 8 to 21%. [9] [10] The largest SAG mill is 42' (12.8m) in diameter, powered by a 28 MW (38,000 HP) motor. [11]
The specific angles of the metate body allow for a proficient method of turning grains into flour. [4] Lesley Téllez describes the grinding action of a metate as using "your wrists to kind of rotate the metlapil forward, while at the same time pressing downward, hard, with the palms of your hands."
Allied Mills flour mill on the banks of the Manchester Ship Canal in North West England, 2010. A gristmill (also: grist mill, corn mill, flour mill, feed mill or feedmill) grinds cereal grain into flour and middlings. The term can refer to either the grinding mechanism or the building that holds it.
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