| 摘要 |
<p>Feed hoppers hold low quality refractory materials and carbonaceous materials which pass, in turn, to mills and, afterwards, to a rotary drier. The resulting mixt. is taken to a waiting hopper and then to a hopper which holds high quality refractory material. - Pitch is held in a steam heated tank, from where it mixes with the mixt. with the help of a screw.</p> |
