Title:
スラグ処理方法
Document Type and Number:
Japanese Patent JP6560868
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To properly determine the amount of oxygen supplied to a slag holding furnace immediately after pouring molten slag.SOLUTION: In a slag treatment method, molten slag produced in a steel making process is charged into a slag holding furnace in a molten state, the molten slag is poured from the slag holding furnace into an electric furnace storing a molten iron layer and a molten slag layer formed on the molten iron layer, and the molten slag is continuously reduced in the electric furnace to recover valuables in the molten slag into the molten iron layer. Exhaust gas generated in the electric furnace is introduced into the slag holding furnace, and an oxygen-containing gas is supplied into the slag holding furnace at a predetermined flow rate to burn combustible components in the exhaust gas. The flow rate of the oxygen-containing gas immediately after pouring the molten slag is determined based on the pouring amount of the molten slag and the amount and temperature of the molten slag contained in the molten slag layer before the pouring.SELECTED DRAWING: Figure 3
Inventors:
Takashi Arai
Toshiya Harada
Toshiya Harada
Application Number:
JP2015027841A
Publication Date:
August 14, 2019
Filing Date:
February 16, 2015
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C04B5/06; C21C5/28; C22B7/04; F27D15/00; F27D17/00; F27D19/00; F27D21/00
Domestic Patent References:
| JP200140406A |
Foreign References:
| WO2015012354A1 |
Attorney, Agent or Firm:
Patent Service Corporation Taiyo International Patent Office