Process for producing sintered ore and sintering apparatus

A manufacturing method and technology of sintering, applied in the direction of furnace, furnace type, lighting and heating equipment, etc., can solve the problems of high risk, poor ventilation, and inability to fully reflect the blowing of flammable gas
CN102239271AActive Publication Date: 2011-11-09JFE STEEL CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JFE STEEL CORP
Publication Date
2011-11-09

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Abstract

A process for sintered-ore production in which high-quality sintered ore having high strength can be safely produced in a high yield with a sintering apparatus of a downward suction type; and the sintering apparatus. The process for sintered-ore production comprises: placing a raw material to be sintered comprising fine ore and a carbon material, on a circulating pallet (8) to form a raw-material layer (9); igniting the carbon material of the raw-material layer in an ignition furnace; and sucking air with a wind box disposed under the pallet to thereby produce sintered ore. After the raw-material layer (9) has been ignited in the ignition furnace, a liquid fuel is atomized to a particle size of 100 [mu]m or smaller and supplied to over the raw-material layer (9), and the atomized liquid fuel is supplied from over the raw-material layer (9) into the raw-material layer (9) after having been diluted at least to the lower limit of ordinary-temperature combustion concentrations. The sintering apparatus has, disposed downstream from the ignition furnace, a liquid-fuel injector which injects the liquid fuel over the raw-material layer.
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Description

technical field

[0001] The present invention relates to a method for producing sintered ore and a sintering machine for producing sintered ore. Background technique

[0002] As the main raw material for blast furnace ironmaking, sintered ore is usually Figure 15 Manufactured by the process shown. The raw materials for sintering are iron ore powder, recycled powder in ironworks, sinter under-sieve powder (returned ore), limestone and dolomite and other CaO-containing auxiliary materials, quicklime and other granulation aids, coke powder, anthracite, etc. These raw materials are respectively cut out by a plurality of hoppers 1 onto the conveyor belt at predetermined ratios. The cut raw materials are mixed and granulated by adding an appropriate amount of water through the drum mixer 2, rotary kiln 3, etc., to produce quasi-particle sintered raw materials with an average particle diameter of 3.0 to 6.0 mm. On the other hand, the lump ore after sizing is cut out from the furn...

Claims

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