The flotation process . ided thatthis was due to insufficient oil. The actual experiments were madeby Arthur H. Higgins, who, by diminishing the amount of oil on the ore, caused so many of the metallic particles to rise thata high recovery was obtained by flotation. H. L. Sulman says thatby reducing the amount of oil the granulation was stopped and co- 5Flotation at Broken Hill. By James Hebbard. Mining and ScientificPress. September 4, 1915. See page 110 of this book. 150 THE FLOTATION PROCESS incidentally a mineral froth began to take its place. This was inMarch 1905. AVhereupon the
The flotation process . ided thatthis was due to insufficient oil. The actual experiments were madeby Arthur H. Higgins, who, by diminishing the amount of oil on the ore, caused so many of the metallic particles to rise thata high recovery was obtained by flotation. H. L. Sulman says thatby reducing the amount of oil the granulation was stopped and co- 5Flotation at Broken Hill. By James Hebbard. Mining and ScientificPress. September 4, 1915. See page 110 of this book. 150 THE FLOTATION PROCESS incidentally a mineral froth began to take its place. This was inMarch 1905. AVhereupon the British patent of Minerals Separation , of April 12, 1905, was taken out by H. L. Sulraan, H. F. , and John Ballot, and subsequently they obtained the U. No. 835,120 of May 29, 1905, issued on November 6, 1906. Inthis patent reference is made to the Cattermole patent and it is J. M. HYDE. AET OF CONCENTEATION OF MINERAL riL£D 50V. 10. 1911. 1,022,085. Patented Apr. 2, Fig. 28. facsimile of hyues patent, as used at the butte & superior mixe. WHAT IS FLOTATION?—II 151 claimed that the granulation characterizing his method is stoppedby reducing the amount of oil to a fraction of 1 % on the ore andthat by vigorous agitation the oil-coated particles are caused to riseto the surface of the pulp in the form of a froth or scum. The useof scum here is unfortunate for Minerals Separation, for it tends toidentify the froth made by this process with the scum made bymost of their predecessors in the art. In this patent acidulatedwater, warming of the mixture, oleic acid from to onthe ore, oleic-soap solution, the formation of the froth, and the sep-arating of the froth from the remainder of the solution are this patent was issued the process has been applied successfully,and on a large scale, in many parts of the world, notably BrokenHill, Great Cobar, Great Fitzroy, Chillagoe, and Wallaroo, all inAustralia;
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