| 摘要 |
<p>The laboratory process consists of coking the paste, in amount below 1000g, in a cylindrical crucible of refractory steel, the base of which consists of a perforated removable plate. The crucible is placed in a modular-type vertical cylindrical furance of refractory and insulating materials, coated on its side and upper surfaces with insulating fibre layers and heated electrically.</p> |
