Gold Refining

Gold Refining Process

To present the essential points of all methods of gold refining commonly practised, as well as those of historic interest,” was the author’s purpose in this volume. The fifteen chapters of which the book consists deal with the Simpler Methods of Early Days;

  • Amalgamation Process;
  • Refining with Oxidising and Chloridising Agents;Gold Refining
  • Sulphur Refining;
  • Refining with Cementation Processes, and by means of Oxygen and Air;
  • Miller’s Process and that adopted at the Melbourne Mint;
  • Parting with Nitric Acid (two chapters);
  • Recovery of Silver from Nitrate Solutions;
  • Refining by Sulphuric Acid;
  • Parting by Electrolysis;
  • Electrolytic Refining of Gold;
  • Separation of Platinum from Gold;
  • Treatment of Cyanide Precipitates;
  • Refining of Gold Slimes by Nitric and Sulphuric Acid; the Nitre Cake Method of Purifying Slimes.
  • How Metallic Minerals Affect Silver and Gold Precipitation

Gold, as it occurs in Nature, is never pure. Occasionally the amount of alloying metal

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Simple Methods of Gold Purification

The purification of such alluvial gold alloys is a simple matter. The high specific gravity of the metal allows of separation from most admixed materials by some process of elutriation, or water concentration, or, in arid regions, by dry blowing. The coarser particles are readily picked out, but the finer are usually admixed with heavy sands, consisting

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Merrill Crowe Process & Equipment

Here is described the essential features of the Merrill Crowe Process and its equipment/apparatus used for the Simultaneous Clarification, De-aeration and Precipitation of cyanide solutions. Limited space has prevented a full description of all of the details involved but we have pointed out the application of the various types

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Gold Ore Chlorination

Experience has shown how difficult it is to obtain information regarding laboratory-tests in connection with the gold ore chlorination process for the extraction of gold from its ores, and I therefore present the following method, somewhat in detail, for the benefit of those who may desire to pursue research work in this field.

The ore chosen was

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