Pulverized coal for pig-iron making comprising cow manure, and pig-iron production method using same

Abstract

The present invention discloses pulverized coal for iron making comprising cow manure and a method for producing pig iron using the same. The present invention has the advantage of making it possible to improve the combustion properties of pulverized coal and to increase the efficiency and safety of a blast-furnace operation.

1 . Pulverized coal for iron making, which comprises, based on 100 parts by weight of coal powder, between more than zero parts by weight and 76 parts by weight or less of dried and crushed cow manure, the dried crushed cow manure having a water content of 20% or less. 
     
     
         2 . The pulverized coal of  claim 1 , wherein the crushed cow manure has a particle size of 50 mm or less. 
     
     
         3 . A method for producing pig iron, comprising the steps of:
 (1) drying cow manure;   (2) crushing the dried cow manure in a pulverizer;   (3) mixing the cow manure with coal powder to prepare pulverized coal; and   (4) injecting the pulverized coal into a blast furnace.   
     
     
         4 . The method of  claim 3 , wherein the pulverized coal comprises, based on 100 parts by weight of the coal powder, between more than zero parts by weight and 76 parts by weight or less of dried and crushed cow manure, the dried crushed cow manure having a water content of 20% or less. 
     
     
         5 . The method of  claim 3 , wherein the cow manure is dried to a water content of 20% or less. 
     
     
         6 . The method of  claim 5 , wherein the cow manure is passed through a particle size separator before introduction into the pulverizer of step (2) so that cow manure having a particle size of 50 mm or less will be transferred directly to a dryer, and the cow manure is crushed in the pulverizer of step (2) so as to have a particle size of 50 mm or less.