| 摘要 |
<p>PCT No. PCT/EP92/01659 Sec. 371 Date Jan. 10, 1994 Sec. 102(e) Date Jan. 10, 1994 PCT Filed Jul. 21, 1992 PCT Pub. No. WO93/02984 PCT Pub. Date Feb. 18, 1993.A method of treating plasterboard production scrap wherein the pieces of the plasterboard scrap having the plaster attached to paper components, is passed through an apparatus which comprises a cylindrical housing in which radial arms carry ploughshares riding along the wall of the vessel and cutting heads are provided between the paths of the ploughshares. The apparatus so reduces the pieces that a homogeneous mixture of fibers of the paper components and granular gypsum is formed. This product mixed with raw gypsum provides a calcinable mixture which can be calcined for use in producing additional plasterboard.</p> |
