| 摘要 |
<p>metallurgy; applicable in recovery of precious metals, particularly, silver from secondary raw materials, more precisely, from wastes of electronic materials. SUBSTANCE: method of recovery of precious metals, particularly, silver includes melting of wastes in presence of flux containing sodium carbonate, borax and sodium nitrate. Initial material before melting is subjected to crushing and grinding with subsequent sifting of ground material, first, through sift No.12, then, through sift No.45, and melting of sifted material at temperature of 1000- 1190 C, with amounts of sodium carbonate, borax and sodium nitrate maintained within ratio of 2:1:1. EFFECT: maximum recovery of silver and other precious metals. 2 ex</p> |
