| 摘要 |
<p>PCT No. PCT/SE81/00061 Sec. 371 Date Oct. 1, 1981 Sec. 102(e) Date Oct. 1, 1981 PCT Filed Mar. 4, 1981 PCT Pub. No. WO81/02568 PCT Pub. Date Sep. 17, 1981.A method is disclosed for converting an arsenic-containing waste product to a depositable, substantially arsenic-free form by fuming-off the arsenic content thereof. The method comprises melting the waste product under oxidizing conditions in a furnace to form an oxidic slag melt; causing turbulence of the melt, while maintaining a reducing atmosphere supporting the formation of arsenic (III) oxide at the furnace temperature driving-off arsenic content of the waste product substantially in the form of gaseous arsenic (III) oxide; separating the formed oxide by condensation and recovering the same and removing from said furnace a substantially arsenic-free depositable slag.</p> |
