Methods of Mine-Timbering Volume 2

Methods of Mine-Timbering Volume 2

By (author) 

List price: US$11.44

Currently unavailable

Add to wishlist

AbeBooks may have this title (opens in new window).

Try AbeBooks

Description

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1896 edition. Excerpt: ...solution by means of aluminium, or alloys, or amalgam thereof. (See patent-specification in Appendix.) C. M. Pielsticker reverts to the application of the electric current, in conjunction with the cyanide solution. He proposes to continuously circulate the solvent, to continuously precipitate the dissolved precious metals by electrolysis, and continuously regenerate thereby the reagent. (See patent specification in Appendix.) The latest patent in connection with cyanide treatment of 'ores is that of Dr. W. D. Johnston, " for abstracting gold and silver from their cyanide solutions by means of pulverized carbon" (for further details, see page 40). To make this report as complete as circumstances permit, I append the specifications of the patents which have been mentioned in the body of this paper, that the mining public may know the exact wording of descriptions and claims.. Such is the history of the cyanide process, rapidly sketched by tracing its development through the phases of its evolution and the intricacies of its patent literature. The modern cyanide process consists in the treatment of ores by means of dilute cyanide of potassium solutions, as a rule without the addition of other chemical substances, and in the subsequent precipitation of the gold and silver from the solution by means of zinc in form of shavings. It is commonly known as the MacArthur-Forrest process. I now propose to enter into a description of the process itself. I embody in it the information given me by Mr. John S. MacArthur, of Glasgow, Scotland. H. SCOPE OF PROCESS. The process can be advantageously applied to many gold ores and many silver ores, and is often suitable for ores which are generally considered as rebellious or refractory. The...show more

Product details

  • Paperback | 180 pages
  • 189 x 246 x 10mm | 331g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236901347
  • 9781236901347