| 摘要 |
<p>1299118 Recovering metal from scrap HORIZONS RESEARCH Inc 6 Nov 1970 [7 Nov 1969] 53025/70 Heading C7D Recovery of metal values from scrap material including organic and/or inorganic contaminants comprises heating to distil off volatile matter in a substantially non-oxidizing atmosphere, physically detaching the major part of the residue of the contaminants and further cleansing the metal values in a fused salt bath. The scrap may be copper wire with insulating covering and the contaminant material may include metals such as tin, lead or solder. In the apparatus shown the scrap is carried into furnace 10 on a conveyer 16. Volatile material escapes from the inlet end and is burnt in a protective flame curtain 18. Any material separated during passage through the furnace drops on to an oppositely moving conveyer 38 and is removed from the inlet end, e.g. the lead on lead coated copper may be removed on conveyer 38. Material leaving the furnace falls into chute 20, on to rolling ring crusher 30 for separation of any residue which is removed through screen 34 while the metal passes through duct 28 to fall into salt bath 40.</p> |
