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  2. Parkes process - Wikipedia

    en.wikipedia.org/wiki/Parkes_process

    Because the zinc is immiscible in the lead it remains in a separate layer and is easily removed. The zinc-silver solution is then heated until the zinc vaporizes, leaving nearly pure silver. If gold is present in the liquid lead, it can also be removed and isolated by the same process. [1] The process [2] was patented by Alexander Parkes in 1850.

  3. Cast bullet - Wikipedia

    en.wikipedia.org/wiki/Cast_bullet

    An open single-cavity bullet mold and a closed two-cavity mold. A cast bullet is made by allowing molten metal to solidify in a mold.Most cast bullets are made of lead alloyed with tin and antimony; but zinc alloys have been used when lead is scarce, and may be used again in response to concerns about lead toxicity.

  4. Gas check - Wikipedia

    en.wikipedia.org/wiki/Gas_check

    Gas checks are most commonly found in the form of a thin cup or disc made of a ductile metal. Copper, zinc, aluminum, and alloys such as brass have been used. A bullet designed to accept a gas check has a rebated base shank which permits attachment of the check without altering the maximum diameter of the bullet.

  5. Dross - Wikipedia

    en.wikipedia.org/wiki/Dross

    It forms on the surface of low-melting-point metals such as tin, lead, zinc or aluminium or alloys by oxidation of the metal. For higher melting point metals and alloys such as steel and silver, oxidized impurities melt and float making them easy to pour off. With wrought iron, hammering and later rolling remove some dross. [1]

  6. Lead smelting - Wikipedia

    en.wikipedia.org/wiki/Lead_smelting

    Finally, the molten lead is refined. Pyrometallurgical methods are usually used to remove the remaining non-lead components of the mixture, for example the Betterton-Kroll process and the Betts electrolytic process. The non-lead metals are usually sold to other metal processing plants. The refined lead may be made into alloys or directly cast. [1]

  7. Metals Treatment Technologies - Wikipedia

    en.wikipedia.org/wiki/Metals_Treatment_Technologies

    Recent [when?] national bullet shortages have resulted in higher prices for consumers, and lower ammunition availability for the military. [5] This need has provided a significant market for MT2. There is an estimated 15 years worth of lead bullets in the ground in American shooting ranges, waiting to be extracted.

  8. 'This will be a burden on all of us': Hundreds to be asked to ...

    www.aol.com/burden-us-hundreds-asked-remove...

    Changes to clean water laws may means hundreds of Great Falls homeowners will have to replace their water lines

  9. Animal lead poisoning - Wikipedia

    en.wikipedia.org/wiki/Animal_lead_poisoning

    Some ammunition manufacturers are producing bullets made of solid copper or a mix of 95% copper and 5% zinc, which are in ways superior to lead bullets. There have been efforts to dredge marshlands to remove the build-up of lead in the sediment from the past, however efforts such as this are expensive.

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