Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR REMOVING SULFUR FROM DESULFURIZATION SLAG
Document Type and Number:
Japanese Patent JP2013087290
Kind Code:
A
Abstract:

To effectively recycle desulfurization slag as a CaO source in a pig iron making step or a steelmaking step, without any effect of sulfur contained therein, by efficiently removing sulfur contained in the desulfurization slag produced by a desulfurization treatment of molten iron.

The method for removing sulfur from the desulfurization slag comprises: a first step of exposing the sulfur-containing desulfurization slag produced by the desulfurization treatment of the molten iron to an atmosphere in which the temperature is within the range of 1,100-1,400°C and the CO/CO2 ratio is adjusted according to the form of a sulfur compound in the desulfurization slag, thereby transferring the sulfur as SOx from the desulfurization slag into a gas phase; a second step of carrying out a desulfurization treatment of exhaust gas containing SOx transferred into the gas phase in the first step; and a third step of recycling the desulfurization slag in which the sulfur content is reduced by the first step as the CaO source in the pig iron making step or a steelmaking step.


More Like This:
JP6544480Hot metal pretreatment method
JP3804143METHOD FOR CONTROLLING ATMOSPHERE IN LADLE STIRRING
Inventors:
MATSUI AKITOSHI
KIKUCHI NAOKI
MIKI YUJI
Application Number:
JP2011225410A
Publication Date:
May 13, 2013
Filing Date:
October 13, 2011
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
JFE STEEL CORP
International Classes:
C21C1/02; C04B5/00; C22B1/16; F27D17/00
Domestic Patent References:
JP2011093761A2011-05-12
Attorney, Agent or Firm:
Shigeru Inoue
Kazuhiro Mori



 
Previous Patent: SINGLE PHASE SILICONE ACRYLATE FORMULATION

Next Patent: ELECTROLYTIC PROTECTION METHOD OF BRIDGE GIRDER END