| 摘要 |
<p>PURPOSE:To perform advantageous and adequate melt reduction of powder and granular ore by blowing the powder and granular ore by reactive gaseous flow under heating into a vetical furnace packed therein with a carbonaceous solid reducing agent and reducing preliminarily said ore by the generating reducing gas. CONSTITUTION:Air is blown under heating through tuyere groups 5, 5' into a vertical furnace 3 where the packed layer of coke or the like is fired. Part of the reducing waste gas 6 generated in the furnace 3 is passed through a pressure increaser 7 into an ore feed pipe 2' to assist the conveyance of the powder and granular ore to the groups 5, 5' so that the ore is blown together with heating air through the groups 5, 5' into the furnace 3. The powder and granular ore blown together with the preheating air into the high temp. region formed in the furnace 3 is immediately heated and is easily melted. While the ore drops toward the lower part of the furnace 3, the ore is reduced to form a molten metal and molten slag, whereby the smelting is accomplished. The molten metal accumulating in the hearth is removed through a tapping port 10 to the outside of the furnace at a proper time. The molten slag is treated in a similar way.</p> |
