The Mining Engineer Volume 4
The Mining Engineer Volume 4
The Mining Engineer Volume 4 by Institution of Mining Engineers
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Author: Institution of Mining Engineers
Number of Pages: 310 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781130202908
File size: 49 Mb
File Name: The.Mining.Engineer.Volume.4.pdf
Download Link: The Mining Engineer Volume 4
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893 Excerpt: ...From these reactions 10766 parts by weight of silver are equivalent to 130 04 parts of potassium cyanide. A convenient standard silver solution is one of such strength that every cubic centimetre added to 10 cubic centimetres of the solution to be tested, corresponds to 01 per cent, of pure potassium cyanide. This method gives good results when pure cyanide solutions are under examination, but when the solutions contain zinc it is difficult if not impossible to determine the end of the reaction. A white flocculent precipitate occurs at a certain stage, probably consisting of simple (insoluble) cyanide of zinc, formed by the decomposition of the soluble double cyanide. This precipitation occurs long before the whole amount of potassium cyanide has been converted into the soluble double salt of silver (KAgCy, ) for the solution after the appearance of the flocculeut precipitate still gives the Prussian blue reaction with acidulated ferrous sulphate. A standard solution of iodine in potassium iodide may be used with great accuracy for determining the total amount of cyanogen in a solution whether in combination with zinc or not, making use of the reaction: --KCy + Is = KI + ICy. The colour of the iodine is discharged so long as an excess of cyanide is present. The sharpness of the terminal reaction may be increased by adding a small quantity of starch to the solution under examination, which gives a permanent blue colour as soon as an excess of iodine has been added. What is most needed, however, is a rapid method of determining the amount of cyanide available for dissolving gold, for, as was pointed out above, the cyanide in combination with zinc is not available for that purpose. The method of testing solutions containing zinc for available cyauide which was i.
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The Mining Engineer Volume 4 by Institution of Mining Engineers
Author: Institution of Mining Engineers
Number of Pages: 310 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781130202908
File size: 49 Mb
File Name: The.Mining.Engineer.Volume.4.pdf
Download Link: The Mining Engineer Volume 4
---------------------------------------------------------------
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893 Excerpt: ...From these reactions 10766 parts by weight of silver are equivalent to 130 04 parts of potassium cyanide. A convenient standard silver solution is one of such strength that every cubic centimetre added to 10 cubic centimetres of the solution to be tested, corresponds to 01 per cent, of pure potassium cyanide. This method gives good results when pure cyanide solutions are under examination, but when the solutions contain zinc it is difficult if not impossible to determine the end of the reaction. A white flocculent precipitate occurs at a certain stage, probably consisting of simple (insoluble) cyanide of zinc, formed by the decomposition of the soluble double cyanide. This precipitation occurs long before the whole amount of potassium cyanide has been converted into the soluble double salt of silver (KAgCy, ) for the solution after the appearance of the flocculeut precipitate still gives the Prussian blue reaction with acidulated ferrous sulphate. A standard solution of iodine in potassium iodide may be used with great accuracy for determining the total amount of cyanogen in a solution whether in combination with zinc or not, making use of the reaction: --KCy + Is = KI + ICy. The colour of the iodine is discharged so long as an excess of cyanide is present. The sharpness of the terminal reaction may be increased by adding a small quantity of starch to the solution under examination, which gives a permanent blue colour as soon as an excess of iodine has been added. What is most needed, however, is a rapid method of determining the amount of cyanide available for dissolving gold, for, as was pointed out above, the cyanide in combination with zinc is not available for that purpose. The method of testing solutions containing zinc for available cyauide which was i.
Read online The Mining Engineer Volume 4 Buy and read online The Mining Engineer Volume 4 Download The Mining Engineer Volume 4 for pc, mac, kindle, readers Download to iPad/iPhone/iOS, B&N nook The Mining Engineer Volume 4 ebook, pdf, djvu, epub, mobi, fb2, zip, rar, torrent
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