Method for preventing clogging at high temperature cyclone inlet of molten iron manufacturing apparatus using plain coal

摘要

The present invention relates to a method and apparatus for preventing the blockage of the inlet of the cyclone by forming a deposit on the wall surface by condensation of water and water vapor having a low melting point at the inlet of the high temperature cyclone in the apparatus for producing molten iron. By injecting nitrogen gas through the nitrogen blowing nozzle connected to the nitrogen gas line to the cyclone inlet portion of the molten iron manufacturing apparatus using a normal coal, the nitrogen gas is introduced into the cyclone wall of the cyclone inlet portion of the reducing gas A gas film is formed at a flow rate, and the gas film prevents formation of deposits on the wall surface of the cyclone inlet by condensation by low melting point material and water vapor, thereby preventing clogging of the cyclone inlet. In order to achieve the above object, the present invention provides a plurality of nitrogen blowing nozzles (10) connected to the nitrogen gas line (5) on the upper and lower sides and left and right sides of the inlet of the cyclone (3), the cyclone (3) Nitrogen is blown into the inlet of the cyclone 3 through the nitrogen injection nozzle 10 to form a gas film on the wall surface of the cyclone 3 at a high flow rate of reducing gas. Therefore, there is a point to prevent the formation of deposits on the wall surface of the cyclone inlet by condensation by low melting point material and water vapor.