Sintering apparatus and method for manufacturing sintered ore using same

Abstract

A sintering apparatus according to the present invention comprises: a sintering carriage capable of charging a raw material for sintering and capable of moving in a proceeding direction of a sinteringprocess; an ignition furnace installed to inject a flame into a charged raw material layer within the sintering carriage on a path where the sintering carriage moves in the proceeding direction of the sintering process; and a plurality of wind boxes installed on the lower side of the ignition furnace and installed side-by-side so as to reduce an area of a suction passage from the ignition furnacetoward a sintering end point. Therefore, an embodiment of the present invention can suppress or reduce the generation of unreacted sintered ores in an upper layer portion and the occurrence of over-firing sintered ores in a lower layer portion, by regulating a flow rate of air through the plurality of wind boxes and further supplying a heat source to the upper layer portion by using a reflectingmember. Further, sintered ores having uniform quality can be obtained regardless of the upper layer portion, an intermediate layer portion, and the lower layer portion, or for the entire raw materiallayer.

Description

technical field [0001] The present invention relates to a sintering plant and a method for producing sintered ore using the sintering plant, and more particularly to a sintering plant and a method for producing sintered ore using the sintering plant in which the productivity of sintered ore is increased and can be produced with consistent quality of sintered ore. Background technique [0002] Sintered ore used as a raw material in a blast furnace ironmaking process is produced in such a manner that iron ore is mixed with coal (or coke) as a heat source, and then the coal is burned to sinter the iron ore by the heat of combustion. [0003] A method of manufacturing sintered ore will be briefly described. First, the hearth bed ore stored in the hearth bed ore hopper and the material mixture stored in the impact hopper are loaded into the carrier and conveyed, and the moving carrier passes under the ignition furnace. At this time, the flame (ie, torch) sprayed from the igniti...

AI Technical Summary

Problems solved by technology

[0004] Meanwhile, as described above, since the carrier passes through the bellows with the flame ignited, the flame and heat move downward, and therefore, there is a problem that the sintered layer of the raw material layer is quickly absorbed by the room-temperature air introduced from the outside after the flame is ignited. cooling and the temperature of the sintered layer decreases

Therefore, the upper part, which is the upper region of the raw material layer, lacks heat and reaction time for the sintering reaction, so that unreacted sinter (ie, sinter lacking iron ore reaction) is generated in the upper part, and therefore, there is The problem is that the production rate of sinter is reduced or the recovery rate of sinter is increased

In addition, due to the temperature gradient generated in the raw material layer as described above, there is a problem that unsintered ore is generated in the upper layer portion and over-sintered sintered ore is generated in the lower layer portion, so that in one carrier Quality deviation of sinter

However, there is a problem in that the sintering productivity (T / D / m 2 )reduce

However, in the case of this method, since the heat source or auxiliary material as fine powder is located on the uppermost surface of the raw material layer, the heat source or auxiliary material is scattered and thus dust is generated, and thus a problem arises in terms of environment

[0008] Therefore, in order to reduce dust generation, moisture is added to the fine powder heat source and the heat source is supplied to the uppermost surface of the raw material layer, but there is a problem that the quality of sintered ore is deteriorated due to moisture

Images