| 摘要 |
<p>PCT No. PCT/AU83/00061 Sec. 371 Date Jan. 25, 1984 Sec. 102(e) Date Jan. 25, 1984 PCT Filed May 13, 1983 PCT Pub. No. WO83/04190 PCT Pub. Date Dec. 8, 1983.A process of recovering asbestos fibre from asbestos-bearing material comprising a first stage of preparing a fibre concentrate by the steps of comminution, classification and spiral concentration and a second stage of liberating and recovering fibre, wherein in the second stage there is a separation by means of a hydrocyclone into a well-opened fraction and a poorly opened fraction, and wherein the asbestos-bearing material is substantially moist throughout the process.</p> |
