Electric stove furnace lid is the spherical shape structure that contains electrode aperture and smoke evacuation aperture, outer shroud part says advocate furnace lid, intermediate part calls port the lid (call trigonometry the area again) , the furnace lid when feed a machine can removed. Technology of electric stove smelt is extremely sophisticated, use condition of trigonometry area prefabricated component is very slashing. Advocate if get,the chemistry of electrode arc radiate, urgent cold urgent heat, molten steel and slag is eroded, the concussion of high speed air current that when removing dust, forms wears away and furnace lid structure is unreasonable the combined influence that waits for an element.
1 arc radiate
Place of discharge of the electrode when electric stove smelt produces arc temperature to be as high as 4000 ℃ above, have acuteness frit damage to working face of small furnace lid. Have arc level, electric arc is exposed in charging upper part, be apart from roof close, heat radiation is big, electric arc is longer, power is greater, bigger to roof radiate heat, roof attaint is faster. General steelworks asks to use inferior archives power transmission when removing arc, control electric arc length; Wearing power supply of big electricity of big voltage of the phase-in in well process, it is to protect furnace lid.
2 urgent cold urgent heat
Electric arc heats, tapping and furnace lid rotate to cause urgent cold urgent heat to the feed a machine outside furnace, make furnace lid produces thermal stress to cause working surface to flake then.
3 remove dust the system takes power
Remove dust the high speed breath that the system takes dirt place to form wears away to the concussion of furnace lid working face. When the inadequacy that take power, the flue gas that useless steel fuses place arises and blaze are major the between clearance transgression from electrode and electrode aperture, air current is long acuteness erode make electrode aperture reaming serious. In advocate furnace lid is shown globose or when arc structure, will cause working face of small furnace lid to be eroded with arc. For this, handlers should clear regularly remove dust inside systematic flue sundry, lest flue jams, the influence removes dust the effect.
4 chemistry are eroded
Molten steel and slag splash come furnace lid working face, among them certain and chemical composition and chemistry of working surface happening react, penetrate working surface interior, form degenerative layer. When temperature the thermal stress that when changing suddenly, produces closes to denaturalize layer flakes, form new working face to be marred circularly again then. Bath fluid face and space of working face of small furnace lid are more expensive, splash action heals small, chemistry erodes an influence smaller. Height is in commonly 1.5m above.
Add of 5 molten iron enters scale
Taller silicon and sulfur are contained in molten iron, form oxidation easily below oxidation atmosphere silicon and a few the acidity material such as oxidation sulfur, mar what aggravate builds to port. Molten iron add is jumped over into scale tall, the impact is bigger.
6 electrode gush drenchs water
Electrode uses gush to drench water measure not only reduced electrode to use up, and the thermal drop that causes electrode aperture week to surround is small, controlled damage of high temperature frit on certain level thereby. If did not adopt this measure,mar aggravate electrode aperture (main show is reaming) .
7 can change the slack influence that water-cooling encircles
Can change water-cooling circle exists in a lot of steelworks slack phenomenon. Slack when, water is taken out quickly along with flue gas by aerification, not big to influence of small furnace lid. But slack and serious may cause molten steel big spurt or furnace explosion accident from time to tome, happen to prevent this accident, often exchange water-cooling ring next soldering ahead of schedule. Meanwhile small furnace lid is issued by condole subsequently. Use on the condole since the another after soldering afresh, right now layer of working surface metamorphism suffers severe urgent cold urgent heat, will bring about life of small furnace lid to be reduced substantially. The marring that suffer is used circularly after in using a process, a small furnace lid encounters water-cooling circle solder frequent and slackly, often especially blame very. See small furnace lid issue craze in cooling condition sometimes when serious or line system is smaller, the person that use will break up, factitious ground restricted the service life of small furnace lid. Accordingly, put an end to can change water-cooling circle is slack be steelworks want the job.
Structure of 8 furnace lid is affected
Flat-roofed structure furnace lid falls in self-prossessed action, because of the muscle craze between electrode aperture, cause easily below the condition that supports without outside force become loose, Ta falls, even 3 electrode aperture becomes a large hole repeatedly (basically fall by Ta cause) , bring about the person that use to change eventually furnace lid. If be vault structure, although break also can be in,furnace lid falls to squeeze break from serious effect close, won't cause become loose, can continue the life of furnace lid. Accordingly, it is good that the furnace lid of vault structure should compare flat-roofed structure on use effect.
9 make standard of technology of bubble broken bits
Later period of electric stove smelt, need builds bubble broken bits. Bubble broken bits is enclothed in molten steel surface, bury electrode arc, not only improve thermal efficiency, and arc appears less, the frit caustic effect that covers working face to port is little. Build bubble broken bits to have two kinds of methods, one kind is largerer carbon is contained in using molten steel, below oxidation atmosphere, can form carbon monoxide automatically to cross slag to form bubble broken bits; What additionally one kind of method uses is more general, gush of carbolic oxygen gun is used to blow carbolic pink and oxygen in furnace door mouth, generate carbon monoxide to cross slag to form bubble broken bits, slagging of the pink that add carbon also can fill artificially in the meantime. The stand or fall that visible bubble broken bits makes builds to port use also have certain effect. Zhengzhou flourish fills fireproof material to regard manufacturer of the adventitious of high quality fireproof material as the home, have rich manufacturing experience and practice base, stand in the forward position that the industry expands from beginning to end, pay attention to innovation of science and technology, increase the development strength to new product ceaselessly, in ensuring flourish fills material to be able to apply to more furnace kiln projects, bring good news for more projects.
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