| 摘要 |
<p>PURPOSE:To efficiently remove the phosphorus in raw materials by using a metal oxide in which evaporated phosphorus is flocculated as the metal oxide to be blown into a smelting furnace from its lower tuyere part and charging only the carbon solid reducing agent from the furnace top. CONSTITUTION:The low-phosphorus molten metal is heretofore produced by forming the packed bed of the carbon solid reducing agent into the vertical type metal smelting furnace and blowing the metal oxide or the metal oxide and a slag forming agent together with high-temp. air or the high-temp. air enriched with oxygen into the furnace from the lower tuyere part. The metal oxide in which the form of the phosphorus contained in the whole or a part thereof is made by the flocculation of the once evaporated phosphorus is used as the metal oxide to be blown in this method. In addition, only the carbon solid reducing agent is charged into the furnace from the furnace top of the packed bed of the carbon solid reducing agent without charging the metals or basic slag forming agents, such as metal oxide and scrap. As a result, the discharge of the phosphorus as dust to the outside of the furnace is accelerated and the low-phosphorus molten metal is produced.</p> |
