Patent ID: 9624558
Date: 2017-04-18
CPC Classifications: C10B,C10L,C21B

Claim:
1. A method for producing blast-furnace injecting coal which produces blast-furnace injecting coal to be injected through a tuyere into an interior of a blast-furnace body of a blast furnace, the method comprising performing: an analysis step of analyzing a composition and a melting point of coal ash and analyzing a composition of an iron and steel slag produced by an iron and steel production step; and a mixing step, in which the iron and steel slag contains more calcium oxide than the coal ash does, and the coal and the iron and steel slag are mixed on the basis of the composition and melting point of the coal ash and the composition of the iron and steel slag, and in a manner such that a content of calcium oxide contained in a quaternary system phase diagram including silicon dioxide, magnesium oxide, aluminum oxide and calcium oxide, which are principal components of the coal ash and the iron and steel slag, causes the melting point of the ash to be 1400° C. or higher.