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Mining Platinum From The Road | Hackaday

We've featured [Cody]'s work here several times before, whether he is refining silver from ore, making his own gunpowder from urine or recreating spent batteries he always can be counted on for an interesting video.

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Technical Discussions – Taylor Anderson Discussion Forum

By Paul Nunes on 7 July, 2018. This is using the 19th Century to build 17th Century equipment. Overhead line shafts driven by steam boilers (or water wheel) that turn leather belts to drive machinery.

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Copper extraction - Wikipedia

Most copper ores contain only a small percentage of copper metal bound up within valuable ore minerals, with the remainder of the ore being unwanted rock or gangue minerals, typically silicate minerals or oxide minerals for which there is often no value.

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Arrastra - Wikipedia

An Arrastra (or Arastra) is a primitive mill for grinding and pulverizing (typically) gold or silver ore.The simplest form of the arrastra is two or more flat-bottomed drag stones placed in a circular pit paved with flat stones, and connected to a center post by a long arm.

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form 13164-c – numismatics

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