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Slag removal device

A technology for slag and blast furnaces, which is applied in the field of slag removal devices for blowpipes, can solve problems such as workability problems, and achieve the effect of reducing pipeline damage and removing them easily and reliably

Inactive Publication Date: 2015-03-11
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] In addition, the methods disclosed in Patent Documents 2 and 3 require manual work, so there is a problem in operability

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0037] One embodiment of the slag removal device according to the present invention will be described below with reference to the drawings.

[0038] The slag removal device of the present embodiment is used in a blast furnace facility for blowing pulverized coal made of low-rank coal as a raw material coal together with hot air into a blast furnace from a tuyere.

[0039] For example, if image 3 In the shown blast furnace equipment, raw materials 1 such as iron ore, limestone, and coal are supplied to a top hopper 21 provided on the top of a main body 20 of a blast furnace by a raw material quantitative supply device 10 through a conveyor 11 . The lower side wall of the blast furnace main body 20 is provided with a plurality of tuyeres 22 arranged at substantially equal intervals along the circumferential direction. Each tuyere 22 is connected to a downstream end of a blowpipe 30 that supplies hot air 2 to the inside of the blast furnace main body 20 . Moreover, the upstrea...

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Abstract

Provided is a slag removal device for a blow pipe, that reduces the risk of pipe breakage, etc., and is capable of achieving easy and reliable slag removal using a simple device configuration. The slag removal device comprises a blow pipe (30) that injects auxiliary fuel pulverized coal, together with hot air, from a tuyere (22) for a blast furnace main body (20) that produces pig iron from iron ore. The slag removal device for a blow pipe including a component that melts on to the pulverized coal slag as a result of the hot air and / or the combustion heat of the pulverized coal comprises a fluid jet nozzle (80) that sprays fluid towards a slag adhesion area inside the blow pipe (30).

Description

technical field [0001] The invention relates to a slag removal device for a blowpipe suitable for blast furnace equipment, in particular to a slag removal device suitable for blowing pulverized coal powder into a blowpipe in a furnace together with hot air as an auxiliary fuel. Background technique [0002] Blast furnace equipment can be manufactured from iron ore by putting iron ore, limestone, coal and other raw materials into the main body of the blast furnace from the top, and blowing hot air and pulverized coal (PCI coal) as an auxiliary fuel from the tuyeres below the side. Birth iron. [0003] In this kind of blast furnace equipment, when the pulverized coal is injected into the operation, if the low-rank coal such as sub-bituminous coal and lignite, which usually has a low ash melting point of about 1100-1300°C, is used as the pulverized coal, it is used to blow the pulverized coal into the furnace. The oxygen contained in the hot air at about 1200°C in the furnace ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/00C21B5/00F27D25/00
CPCC21B7/163C21B7/24C21B5/003F27D25/00C21B5/006F27B1/16F27B1/26F27D25/008
Inventor 坂口雅一滨田务冈田刚嗣大本节男中川庆一
Owner MITSUBISHI HEAVY IND LTD