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Nickel is one of the important strategic reserves metal is widely used in metallurgy, chemical industry, construction , petroleum , machinery, instruments , light industry and other industries . Industry technological progress as electroplating , petroleum , chemicals, precision alloy , electroless nickel purity quality requirements increased year by year . In the study on the basis of the method of production of metallic nickel , nickel ore resources of the world and China , consumption of nickel and its related products and the manufacturing methods and processes of metallic nickel , nickel refinery equipment , and draw on a variety of nickel smelting the method , first by vacuum distillation , and then using the experimental program electrolytic preparation of high purity nickel . Vacuum distillation impurity removal process can simplify the process of electrolysis anolyte Purification extraction process , the principles of thermodynamics and process conditions of vacuum distillation , purification of the crude nickel system , determined through experiments anolyte Impurity condition parameters , and the electrolysis experiments small test to get through the entire process . In this paper, a purity of 99.96% of coarse nickel in the vacuum distillation section as starting materials, through thermodynamic calculation analysis , a different temperature , holding time in the low-vacuum conditions , subjected to vacuum distillation experiment . Draw the following conclusions : (1) In the experimental results calculated by the product of each impurity Yi , αi , βi, γi0 the experimental values ??, from a thermodynamic point of view analysis of the degree of the separation of these impurities with the main elemental nickel . ( 2) to determine the method of vacuum distillation the coarse nickel purification purify process feasibility and conditions of the parameters . 1600 ℃, the temperature of the experimental conditions for the insulation 2.5h , the degree of vacuum is under 5-10Pa , wherein the impurity elements ( Si , P , S , Zn , As, of Cd, Sn, and Sb, Pb , Bi, , Al , Mn, , Mg zero nickel ( 99.99%) of the nickel content standards ) have reached significant effect of vacuum distillation experiments . Anolyte Impurity part of the same research group students experiment to determine the test methods processes . Electrolytic method for purification of crude nickel in crude nickel electrolytic part , through the preliminary experiments , are familiar with the the nickel electrolysis operating practices , electrolysis experiment achieved initial results , which laid the foundation for further electrolysis study .
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