| 摘要 |
<p>PURPOSE:To prevent the generation of defective products by allowing a pellet calcined under specified conditions and/or a green pellet to precede at the start of the operation for calcining the green pellet obtained by pelletizing fly ash, combustible carbonaceous material, etc. CONSTITUTION:Water is added as a binder to the fly ash and combustible carbonaceous material, and the mixture is kneaded and pelletized to produce a green pellet P. The green pellet P is charged onto the moving grate 2 of a moving grate-type calcining machine, and calcined. At the start of the operation of the calcining machine, the calcined pellet and/or special green pellet and/or special green pellet are charged onto the grate 2 in the amt. enough to fill the ignition furnace 4 of the calcining machine and the length of the heat retaining zone. The combustible carbonaceous material is additionally added to the special green pellet in the amt. 0.5-7% more than normally. The ordinary green pellet is successively charged onto the grate 2.</p> |
