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In the nitre bluing process, polished and cleaned steel parts are immersed in a bath of molten salts—typically potassium nitrate and sodium nitrate (sometimes with 9.4 grams (0.33 oz) of manganese dioxide per pound of total nitrate). The mixture is heated to 310 to 321 °C (590 to 610 °F) and the parts are suspended in this solution with wire.
A nitre bed is a similar process used to produce nitrate from excrement. Unlike the leaching-based process of the nitrary, however, one mixes the excrements with soil and waits for soil microbes to convert amino-nitrogen into nitrates by nitrification. The nitrates are extracted from soil with water and then purified into saltpeter by adding ...
Chalcanthum – the residue produced by strongly roasting blue vitriol (copper sulfate); it is composed mostly of cupric oxide. Chalk – a rock composed of porous biogenic calcium carbonate. CaCO 3; Chrome green – chromic oxide and cobalt oxide. Chrome orange – chrome yellow and chrome red. Chrome red – basic lead chromate – PbCrO 4 +PbO
Niter or nitre [5] is the mineral form of potassium nitrate, KNO 3.It is a soft, white, highly soluble mineral found primarily in arid climates or cave deposits. Historically, the term niter was not well differentiated from natron, both of which have been very vaguely defined but generally refer to compounds of sodium or potassium joined with carbonate or nitrate ions.
Computer-aided process planning (CAPP) is the use of computer technology to aid in the process planning of a part or product, in manufacturing. CAPP is the link between CAD and CAM in that it provides for the planning of the process to be used in producing a designed part.
Police believed William Dale Archerd killed three of his wives, two men, and his 15-year-old nephew. From left, top, are William Edward Jones Jr., Zella Winders Archerd and Juanita Plum Archerd.
President-elect Trump announced two new foreign ambassadors on Tuesday in a Truth Social post. “It is my great honor to announce that John Arrigo will serve as the next United States Ambassador ...
Jamie Dimon, chief executive officer of JPMorgan Chase, has some positive views on how AI might impact the future workforce. (Manuel Orbegozo/Bloomberg - Getty Images)