Japan, March 5 -- NIPPON STEEL CORP has got intellectual property rights for 'OPERATION METHOD FOR BLAST FURNACE.' Other related details are as follows:
Application Number: JP,2022-123098
Category (FI): C21B5/00,311,C21B5/00,313
Stage: PROBLEM TO BE SOLVED: To suppress an increase in the thickness of a mixed layer in a cohesive zone and to enhance the air permeability in a furnace.SOLUTION: The present invention provides an operation method for a blast furnace for producing pig iron by alternately forming coke layers and ore layers. With a furnace diameter position included in the range of 0.1 or more and 0.3 or less in the blast furnace dimensionless radius as a boundary, the area on the furnace center side of this boundary is defined as the furnace center part and the area on the furnace wall side of this boundary is defined as the non-furnace center part. The coke layer in the non-furnace center part is divided into an upper layer and a lower layer, respectively, and the upper layer and the lower layer are defined as a coke upper layer and a coke lower layer, respectively. In this case, the operation method charges coke so that the hydrodynamic radius of the coke upper layer is smaller than the hydrodynamic radius of the coke lower layer and the hydrodynamic radius of the coke layer in the furnace center part.SELECTED DRAWING: Figure 4 (Grant)
Filing Date: Aug. 2, 2022
Publication Date: Feb. 15, 2024
The original document can be viewed at: https://www.j-platpat.inpit.go.jp/p0100
Disclaimer: Curated by HT Syndication.
