| 摘要 |
<p>In a process for producing cast-iron containing silicon, in which sand and finely-divided iron or steel are heated in a furnace or cupola together with coke or other carbonaceous material (which may be the heating fuel) to produce ferro-silicon in the presence of the iron or steel with which it is to be combined, a furnace or cupola having two widely-spaced melting zones is employed, the sand and finely-divided iron or steel being introduced above the upper heating zone. The ferro-silicon is formed in the region between the two zones, after the ingredients have been melted in the upper zone, and it combines with the metal passing down this region, further heating and melting of the metal occurring in the lower zone. The mixture of sand, finely-divided iron or steel, and coke, which may be respectively in the proportions seventeen, twenty-eight, and ten by weight, may be put into sheet-metal containers, which are charged into the furnace together with the metal, which may be scrap steel, and fuel.</p> |
