Title:
METHOD FOR PREPARING BLAST FURNACE BLOW-IN COAL
Document Type and Number:
WIPO Patent Application WO/2014/057778
Kind Code:
A1
Abstract:
Provided is a method that is for preparing blast furnace blow-in coal and that can obtain blast furnace blow-in coal that suppresses accretion and the like of blast furnace blow-in ash at a pathway leading to a tuyere of a blast furnace main body while suppressing a decrease in the amount of heat generation despite containing low-ash-melting-point coal. On the basis of data obtained by means of analyzing coal, a first and second coal type satisfying conditions (A, B) are selected (S2, S3), the ash melting point of the mixed coal resulting from mixing the first and second coal types is derived (S4) on the basis of a four-dimensional state diagram for SiO2-CaO-MgO-20%Al2O3, on the basis of the ash melting point of the mixed coal and the four-dimensional state diagram, an additive causing the ash melting point of the mixed coal to be at least 1400°C at the lowest quantity when added to the mixed coal is selected (S5) from SiO2, MgO, and CaO, the addition quantity is derived (S6), the first coal type and second coal type are mixed (S7) to result in the mixed coal, and the addition quantity of the additive is added (S8) to the mixed coal.
Inventors:
NAKAGAWA KEIICHI (JP)
OMOTO SETSUO (JP)
SAKAGUCHI MASAKAZU (JP)
HAMADA TSUTOMU (JP)
OMOTO SETSUO (JP)
SAKAGUCHI MASAKAZU (JP)
HAMADA TSUTOMU (JP)
Application Number:
PCT/JP2013/075229
Publication Date:
April 17, 2014
Filing Date:
September 19, 2013
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD (JP)
International Classes:
C21B5/00
Foreign References:
| JP2001294911A | 2001-10-26 | |||
| JP2001323307A | 2001-11-22 | |||
| JPS5779103A | 1982-05-18 | |||
| JP2005068474A | 2005-03-17 |
Attorney, Agent or Firm:
MITSUISHI, Toshiro et al. (JP)
Toshiro Mitsuishi (JP)
Toshiro Mitsuishi (JP)
Download PDF: