Oxygen-gas fuel supply device for sintering machine
A gas fuel and supply device technology, applied to the maintenance of heating chambers, furnaces, lighting and heating equipment, etc., can solve the problems of insufficient holding time in high temperature areas, poor reducibility of sintered ore, etc.
Active Publication Date: 2017-05-24
JFE STEEL CORP
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Problems solved by technology
However, the technology of this patent document 1 has a problem that the sintered ore is reduced due to the improvement of the strength, productivity, and yield of the sintered ore by increasing the maximum attained temperature at the time of sintering by burning coke and gaseous fuel. Sexual (RI) deterioration
However, the technology of this patent document 3 is to improve the combustibility of coke and realize the rise of the maximum attained temperature by enriching the oxygen concentration in the combustion air to 35% or more, but there are 1200 The problem that the holding time in the high temperature region above ℃ becomes insufficient
Method used
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Embodiment Construction
[0061] For the manufacturing method of the sintered ore to which the technology of the present invention is applied, the sintering machine of the suction type below is used, and the sintering raw material containing the ore powder and the carbon material is loaded on the tray which moves circularly to form the loading layer, and the ignition furnace is used to The carbon material on the surface of the loading layer is ignited, and the air containing the gaseous fuel that has been diluted to a concentration below the lower limit of combustion in the cover above the loading layer located downstream of the ignition furnace is sucked by the air box arranged under the tray. However, it is the same as the techniques disclosed in Patent Documents 4 to 6 in that the gas fuel and the carbon material are burned and sintered to produce sintered ore in the charged layer.
[0062] Therefore, in the case of supplying gaseous fuel, when sintering with the combustion heat of the carbon materia...
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An oxygen- gaseous fuel supply apparatus for a sintering machine by blowing oxygen into air inside a hood disposed above a raw material bed at a downstream side of an ignition furnace to enrich oxygen, and further sucking air supplied with a gaseous fuel diluted to not more than a lower flammable limit by wind boxes arranged below a pallet and introducing into the bed, and combusting the gaseous fuel and carbonaceous material in the bed to produce a sintered ore, wherein baffle plates each made of a chevron plate material are arranged in plural rows at intervals in the horizontal direction and in plural steps in the vertical direction so as to arrange the intervals in a zigzag form in a vertical mid position of the hood, and gaseous fuel supply pipes for supplying the gaseous fuel into air are arranged below the baffle plates, and oxygen supply pipes for blowing oxygen into air are arranged above the baffle plates.
Description
technical field [0001] The present invention relates to an oxygen-gas fuel supply device in a bottom-suction belt sintering machine for producing high-quality sintered ore for blast furnace raw materials by enriching oxygen and supplying gas fuel. Background technique [0002] The sintered ore as the main raw material of the blast furnace ironmaking method is generally processed through such as figure 1 Manufactured by the process shown. The raw materials of sintering ore are iron ore powder or sinter sieve powder, recycled powder produced in the iron factory, limestone and dolomite and other CaO-containing auxiliary materials, quicklime and other granulation aids, coke powder or anthracite, etc., as scheduled Proportions Cut these materials from each hopper of hopper 1... onto the conveyor. The cut raw materials are mixed and granulated by adding an appropriate amount of water using drum mixers 2 and 3 to prepare sintered raw materials as quasi-particles with an average p...
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IPC IPC(8): C22B1/20F27B21/08
CPCC22B1/20F27B21/06F27D7/02
Inventor 岩见友司岩崎克博
Owner JFE STEEL CORP