Preparation of light aluminum-copper casting alloys

✍ Scribed by R.J. Anderson

• Publisher: Elsevier Science
• Year: 1923
• Tongue: English
• Weight: 113 KB
• Volume: 195
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(23)90199-7

✦ Synopsis

STATEMENTS have appeared in the technical press, indicating that valuable metals such as gold, silver, platinum, and other rare metals, have been found and also have been successfully extracted from oil shales. An investigation of the subject was made by the metallurgical division of the Bureau of Mines, in order, if possible, to determine to what extent, if any, metals of value do occur in oil shales, and if so, the feasibility of attempting their recovery by the processes said to have been used for that purpose. An agreement was entered into with the owner of an extensive oil shale deposit in Wyoming, whereby I personally collected the samples of shales for use in the investigation.

The samples tested contained minute amounts of gold, to the extent of possibly 4 ° or 5 ° cents per ton of original shale, but the amount found is not of commercial value.

No special precautions are necessary in assaying shale for gold, any direct assay by a reliable method will give the true gold content of the original material.