| 摘要 |
PURPOSE:To permit the effective utilization of a wet type blast furnace dust by a method wherein spigot accumulated in the lower part of a waste water pit is blown into the furnace from respective tuyeres of the blast furnace by controlling the concentration of slurry. CONSTITUTION:Washing water from the cleaning equipment of a blast furnace is recovered to a waste water pit 6 through a pipe line 11 and is effected natural sedimentation, therefore, they are separated to supernatant liquid 12 and the spigot 13 containing the blast furnace dust. The spigot 13 is drawn up by a waste water pump 4 and the concentration of the slurry is controlled by 30% by a moisture control device 8, then, it is sent to a mixing device 9 while the slurry is stirred in order to prevent to become impossible to send the liquid due to sedimentation of the blast furnace dust contained into the liquid, next, it is blown to the blast furnace from respective tuyeres 14 through the distributing device 10 of the slurry. According to this method, the wet type blast furnace dust is treated easily, moreover, it can utilize as effective iron source and heat source. Further, it is blown together with water to the blast furnace, therefore, it can use instead of humidity conditioning steam and may be effected the rationalization of the blast furnace. |
