CN102384653A - Method for changing refractory brick at tapping hole of direct current electric arc furnace - Google Patents

Method for changing refractory brick at tapping hole of direct current electric arc furnace Download PDF

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Publication number
CN102384653A
CN102384653A CN2011103424473A CN201110342447A CN102384653A CN 102384653 A CN102384653 A CN 102384653A CN 2011103424473 A CN2011103424473 A CN 2011103424473A CN 201110342447 A CN201110342447 A CN 201110342447A CN 102384653 A CN102384653 A CN 102384653A
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CN
China
Prior art keywords
refractory brick
iron mouth
furnace
iron
tapping hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011103424473A
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Chinese (zh)
Inventor
刘平
邹捷
文建华
刘建良
龙坤
黄栓保
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yunnan Xinli Nonferrous Metals Co Ltd
Original Assignee
Yunnan Xinli Nonferrous Metals Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yunnan Xinli Nonferrous Metals Co Ltd filed Critical Yunnan Xinli Nonferrous Metals Co Ltd
Priority to CN2011103424473A priority Critical patent/CN102384653A/en
Publication of CN102384653A publication Critical patent/CN102384653A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a method for changing a refractory brick at a tapping hole of a direct current electric arc furnace. The method comprises the following steps of: (1) stopping feeding a material into the furnace and preserving heat; (2) discharging molten iron above the tapping hole; (3) clearing the outermost casting material of the tapping hole; (4) stopping the furnace; (5) detaching the damaged refractory brick; (6) building a new refractory material; and (7) starting the furnace to recover production. According to the method, the damaged refractory brick at the tapping hole is discovered by observation and analysis, the furnace is stopped after a large amount of molten iron higher than the tapping hole is discharged, the damaged refractory brick is detached, and the refractory brick is newly built. Compared with a common changing method, the method has the advantages that: the slag in the furnace does not need to be emptied, the repair time is relatively short, the changing method is simple and convenient and the like, and the method is relatively practical in the field of metallurgy.

Description

A kind of replacing method of direct-current arc fire grate iron mouth refractory brick
Technical field
A kind of novel airtight direct-current arc fire grate iron mouth refractory brick replacing method is applicable to novel airtight direct current electric arc furnace smelting titanium slag row iron mouth refractory brick replacing method and technology field.
Background technology
At present the electric furnace of suitability for industrialized production titanium slag has open type, semi-hermetic type, closed, and the above two smelting process belongs to batch (-type), and what the closed direct current electric arc furnace smelted that high titanium slag adopted is continuity production.And no matter be open type, semi-hermetic type or closed, row's iron mouth refractory brick all very easily damages.With the general method iron mouth refractory brick that more changes gear, not only need melt in the emptying stove, also need long-time blowing out.Owing to have a large amount of melts in the airtight direct current electric arc furnace stove, can't accomplish melt in the emptying stove at all.General replacing method is not suitable for the closed direct current electric arc furnace.
Propose the method that a kind of novel airtight direct-current arc fire grate iron mouth refractory brick is changed to above situation the present invention, this invention can improve production efficiency greatly, has reduced economic loss.
Summary of the invention
The objective of the invention is to realize like this: a kind of replacing method of direct-current arc fire grate iron mouth refractory brick, step of the present invention is: (1) stove stops material and is incubated; (2) discharge the molten iron more than the iron mouth; (3) the outmost pours of cleaning row's iron mouth; (4) blowing out; (5) remove the refractory brick that damages; (6) build new refractory material by laying bricks or stones; (7) blow-on is resumed production.
Wherein: step (2) is discharged the molten iron more than the iron mouth, need not melt emptying in the stove, only need be the molten iron emptying more than the iron mouth.
Step (4) blowing out because the replacing time is short, does not need long-time blowing out.
Step (7) blow-on, because the replacing time is shorter, temperature can be too not low in the stove, so need not to mend for a long time temperature after the blow-on, improved production efficiency greatly.
The present invention produces row's iron mouth of the airtight direct current electric arc furnace of high titanium slag and is made up of Copper Water Jacket, refractory brick and silicon carbide castable; On the limit of row's iron mouth four Copper Water Jackets up and down; Refractory brick on the Copper Water Jacket limit is to adopt the mode of neck brick to pile up; The passage of row's iron mouth is made up of eight blocks of carbon bricks from the inside to surface, and row's iron mouth outermost is poured into a mould with silicon carbide castable.Row's iron mouth refractory brick is the most flimsy to be exactly those eight blocks of carbon bricks.If the untimely replacing in back in case carbon brick is damaged molten iron will take place from arranging phenomenon, the more serious high-temperature fusant that will cause burns the furnace wall.If it is thus clear that the untimely iron mouth refractory brick that more changes gear will bring serious consequence.The novel iron mouth that more changes gear of this employing is fire-resistant to be to reduce temperature in the stove through the above melt of a large amount of discharges row's iron mouths, blowing out cooling, and the refractory material of the row's of taking apart iron mouth builds again that refractory brick realizes by laying bricks or stones again.
The invention has the beneficial effects as follows, 1, need not melt in the emptying stove, 2, need not long-time blowing out, 3, the replacing time is short, need not blowing out completely and overhaul.
Further set forth content of the present invention below in conjunction with accompanying drawing and embodiment.
Description of drawings
Fig. 1 is row's iron oral-lateral view of airtight direct current electric arc furnace.
The specific embodiment
A kind of replacing method of direct-current arc fire grate iron mouth refractory brick, step of the present invention is:
(1) stove stops expecting to be incubated; (2) discharge the molten iron more than the iron mouth; (3) the outmost pours of cleaning row's iron mouth 1.; (4) blowing out; (5) refractory brick of dismounting damage 2.; (6) build new refractory material by laying bricks or stones; (7) recover the outmost pours of row's iron mouth 1.; (8) blow-on is resumed production.
Wherein: step (2) is discharged the molten iron more than the iron mouth, need not melt emptying in the stove, only need be the molten iron emptying more than the iron mouth.
Step (4) blowing out because the replacing time is short, does not need long-time blowing out.
Step (8) blow-on, because the replacing time is shorter, temperature can be too not low in the stove, so need not to mend for a long time temperature after the blow-on, improved production efficiency greatly.
Seeing Fig. 1, is four Copper Water Jackets 5 up and down on the limit of row's iron mouth 4, and the refractory brick on the Copper Water Jacket limit is to adopt the mode of neck brick to pile up, and the passage of row's iron mouth is made up of 2 of eight blocks of carbon bricks from the inside to surface.Row's iron mouth outermost is poured into a mould with silicon carbide castable 1.The purpose of changing is to change carbon brick 2 that damages and the fire-resistant wall body brick 3 that the part periphery damages in row's iron mouth passage.1), the temperature of the degree of depth through the tapping outlet drilling rod and row's iron mouth thermocouple judges whether well damage of row's iron mouth refractory brick a kind of replacing method of novel row's iron mouth refractory brick is following:.Iron mouth electric thermo-couple temperature is higher than 800 ℃ to the general drilling rod degree of depth for a long time less than 800mm, and the row's of explanation iron mouth refractory brick well damage must be changed.2), stove stops feed before replacing, the row's of increasing iron amount strives discharging a molten iron that is higher than row's iron mouth.3), clean out the outmost silicon carbide castable of row's iron mouth with pneumatic pick.4), treating after the clearly intact pours for the sake of security must blowing out, prevents that stove is too fastly cold, the temperature according to stove after the blowing out is come the suitable air quantity that reduces cooling water flow and furnace bottom blower fan.5), the carbon brick in row's iron mouth passage is also smashed taking-up with pneumatic pick; 6), beat with pneumatic pick in the process of carbon brick and must carry out thermometric, in case when finding that the carbon brick temperature is too high, must quit work with infrared radiation thermometer; Cool off with compressed air, treat the normal continued work of temperature.Burn with the oxygen pipe when 7), in beating the process of brick, running in the brick shim.8) build new refractory brick by laying bricks or stones after, brick to be damaged has been beaten.9), waiting to have built by laying bricks or stones the blow-on of back recovery stove cooling system resumes production.The present invention is more changed gear the method for iron mouth refractory brick through facts have proved that changing two row's iron mouths only needs 24 hours.Inferior method can apply to many stoves of field of metallurgy.
Outside the advantages such as that the replacing method of large-sized DC electric arc fire grate iron mouth refractory brick of the present invention not only has is easy and simple to handle, the replacing time is short, also prolonged the service life of stove greatly.

Claims (4)

1. the replacing method of a direct-current arc fire grate iron mouth refractory brick is characterized in that step is:
(1) stove stops expecting to be incubated; (2) discharge the molten iron more than the iron mouth; (3) the outmost pours of cleaning row's iron mouth; (4) blowing out; (5) remove the refractory brick that damages; (6) build new refractory material by laying bricks or stones; (7) blow-on is resumed production.
2. the replacing method of a kind of direct-current arc fire grate iron mouth refractory brick according to claim 1 is characterized in that, step (2) is discharged the molten iron more than the iron mouth, need not melt emptying in the stove, only need be the molten iron emptying more than the iron mouth.
3. the replacing method of a kind of direct-current arc fire grate iron mouth refractory brick according to claim 1 is characterized in that, step (4) blowing out because the replacing time is short, does not need long-time blowing out.
4. the replacing method of a kind of direct-current arc fire grate iron mouth refractory brick according to claim 1 is characterized in that, step (7) blow-on; Because the replacing time is shorter; Temperature can be too not low in the stove, so need not to mend for a long time temperature after the blow-on, improved production efficiency greatly.
CN2011103424473A 2011-11-03 2011-11-03 Method for changing refractory brick at tapping hole of direct current electric arc furnace Pending CN102384653A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011103424473A CN102384653A (en) 2011-11-03 2011-11-03 Method for changing refractory brick at tapping hole of direct current electric arc furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011103424473A CN102384653A (en) 2011-11-03 2011-11-03 Method for changing refractory brick at tapping hole of direct current electric arc furnace

Publications (1)

Publication Number Publication Date
CN102384653A true CN102384653A (en) 2012-03-21

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104964564A (en) * 2015-06-16 2015-10-07 云南锡业股份有限公司 Anode furnace oxido-reduction mouth brick hot-state replacement method and novel anode furnace
CN106313275A (en) * 2016-08-19 2017-01-11 郑州东方安彩耐火材料有限公司 Continuous production method for cast refractories

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0255712A (en) * 1988-08-22 1990-02-26 Polyplastics Co Novel cyclic acetal polymer and manufacture thereof
CN101790587A (en) * 2007-09-10 2010-07-28 新日本制铁株式会社 Tap hole structure of melting furnace and method of repairing same
CN102134621A (en) * 2010-11-11 2011-07-27 新兴铸管股份有限公司 Blast furnace iron notch patching method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0255712A (en) * 1988-08-22 1990-02-26 Polyplastics Co Novel cyclic acetal polymer and manufacture thereof
CN101790587A (en) * 2007-09-10 2010-07-28 新日本制铁株式会社 Tap hole structure of melting furnace and method of repairing same
CN102134621A (en) * 2010-11-11 2011-07-27 新兴铸管股份有限公司 Blast furnace iron notch patching method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
甘素捧: "石钢350m~3高炉铁口维护实践", 《河北冶金》 *
谢泽强,唐治誉: "高碳铬铁电炉出铁口的修补", 《铁合金》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104964564A (en) * 2015-06-16 2015-10-07 云南锡业股份有限公司 Anode furnace oxido-reduction mouth brick hot-state replacement method and novel anode furnace
CN104964564B (en) * 2015-06-16 2017-03-29 云南锡业股份有限公司 The method of the hot replacing of anode furnace oxidoreduction mouth brick
CN106313275A (en) * 2016-08-19 2017-01-11 郑州东方安彩耐火材料有限公司 Continuous production method for cast refractories

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Application publication date: 20120321

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