- Industri: Mining
- Number of terms: 33118
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- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
A metallurgical process consisting of a chloridizing roasting, leaching with water to remove base metals (some silver is dissolved and must be recovered), leaching with sodium hyposulfite for silver, and the precipitation of silver by sodium sulfide. The process was first carried out by von Patera at Joachimstal (Jachymov), Czech Republic.
Industry:Mining
A metallurgical process for recovering copper from low-grade complex ores in which a mixture of the ore and a small quantity of salt and coke are heated, and the oxides or sulfides reduce to metal that migrates or segregates in the form of thin films or flakes. These are later recovered by conventional flotation procedures.
Industry:Mining
A metallurgical process for the recovery of copper. Copper sulfides are dissolved by solutions of ferric sulfate containing free sulfuric acid, and the solution is then electrolyzed in a tank having a diaphragm. Copper is deposited, and ferric sulfate is regenerated.
Industry:Mining
A metallurgical process in which large charges of lead ore are roasted at low temperatures in furnaces and treated substantially, such as in the Carinthian process. The residual containing considerable lead is remelted in special furnaces.
Industry:Mining
A metallurgical process in which the valuable contents of an ore are dissolved by acid or other solvents; a leaching or lixiviation process. Opposite of dry process.
Industry:Mining
A metallurgical process similar to the Patera process, except that cuprous sodium hyposulfite is used in addition to the sodium hyposulfite.
Industry:Mining
A metallurgical technique in which metal powder is pressed into a desired shape.
Industry:Mining
A metamict variety of zircon that is nearly amorphous owing to radiation damage; it has lower density than crystalline zircon.
Industry:Mining
