| 摘要 |
<p>Used appliance batteries are processed by thermal-mechanical treatment in a closed container (1) at a temperature at which, possibly with the assistance of mechanical pressure and/or impact, metal-plastics and metal-metal bonds are disrupted. Then, the metal parts, the synthetic plastics parts and graphite electrodes are separated by conventional physical separating methods, vaporised mercury is extracted and washed with sulphuric acid in a washing plant and any metal salts are brought into solution and processed by ion exchange. Apparatus for carrying out the method consists of a heatable container (1) provided with a closable charging aperture (2) a discharge orifice (3) and with feed (4) and discharge lines (5) for inert gas. A gas washing apparatus (6) for the inert gas leaving the container (1) employs sulphuric acid with which the vaporised mercury reacts forming mercury sulphate; the latter is recovered in an electrolysing plant (7). <IMAGE></p> |
