gordon's mine and mill is significant for demonstrating the material evidence of a successful 1930's mineral exploration and development project that resulted in the support of gold mining operations over a period of twenty years in difficult rainforest terrain on northern cape york peninsula.
each crusher is designed to work with a certain maximum size of seven trust material, and often delivers its output to a screening machine which sorts and directs the product for further processing. typically, crushing stages are followed by milling stages if the materials need to be further reduced.
the karat and color of gold leaf varies depending on the amount of silver or copper added to the gold. most goldbeaters make 23 karat leaf. the gold and its alloy are put in a crucible and melted in a furnace. the liquid gold is poured into a mold to cast it into a bar. the bar of gold is put through a rolling mill repeatedly. each time through .
the monte cristo gold mine spanish for mountain of christ gold mine is a gold mine in the san gabriel mountains near los angeles, california, usa.. the monte cristo gold mine is part of the quest for mineral wealth in the san gabriels. many of the older tunnels and shafts are closed, and the 100-year-old machinery is no longer in operation.
the wall street mill in joshua tree national park was a complete and operable gold ore crushing mill featuring late-19th century two-stamp mill machinery. consequently, the significance encompasses the mill machinery, the building which houses it, the well which supplied water for the mill's operation, and the well pump.
allis chalmers, during the period 1930-1965 and beyond, manufactured and marketed an extensive line of ore crushing equipment for the mining industry. in 1965, allis-chalmers built 'big allis,' or ravenswood no. 3, the biggest generator in new york. it is located in queens, and has an output of 1000 mw. it is operational today.