CN2613123Y - DC arc hearth electrode - Google Patents
DC arc hearth electrode Download PDFInfo
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- CN2613123Y CN2613123Y CN03230028.XU CN03230028U CN2613123Y CN 2613123 Y CN2613123 Y CN 2613123Y CN 03230028 U CN03230028 U CN 03230028U CN 2613123 Y CN2613123 Y CN 2613123Y
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 239000011449 brick Substances 0.000 claims abstract description 61
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 34
- 238000010891 electric arc Methods 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims description 18
- 239000000498 cooling water Substances 0.000 claims 3
- 239000007788 liquid Substances 0.000 abstract description 15
- 238000002844 melting Methods 0.000 abstract description 10
- 230000008018 melting Effects 0.000 abstract description 10
- 230000006378 damage Effects 0.000 abstract description 6
- 230000008595 infiltration Effects 0.000 abstract 1
- 238000001764 infiltration Methods 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 9
- 229910052802 copper Inorganic materials 0.000 description 9
- 239000010949 copper Substances 0.000 description 9
- 238000003723 Smelting Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 229910000754 Wrought iron Inorganic materials 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
直流电弧炉底电极，包括电极本体、袖砖、水套、水套法兰、连接法兰、导铅盘、高位浅盘、低位钢盘；其中，电极本体插入电弧炉炉底，袖砖包覆于电极本体；水套通过水套法兰、连接法兰与炉底相固定连接；导铅盘置于连接法兰与炉底之间；高位浅盘置于电弧炉炉体内，位于导铅盘上方；低位钢盘固定于水套法兰上端面，且在二者之结合面上开有供热电偶插入的沟槽；电极本体为变直径结构，由上到下直径逐渐变大。本实用新型可降低通电产生的焦耳热而使底电极温度降低，从而减少相关构件损坏的几率；可降低因铅液渗入炉底而引起短路起弧的几率；可使底电极孔穴内钢液的对流趋缓，从而降低袖砖的熔损速率而延长其使用寿命。
Bottom electrode of DC electric arc furnace, including electrode body, sleeve brick, water jacket, water jacket flange, connecting flange, lead plate, high shallow plate, and low steel plate; among them, the electrode body is inserted into the bottom of the electric arc furnace, and the sleeve brick is wrapped Cover the electrode body; the water jacket is fixedly connected with the furnace bottom through the water jacket flange and the connecting flange; the lead guide plate is placed between the connecting flange and the furnace bottom; Above the plate; the low-level steel plate is fixed on the upper end of the water jacket flange, and there is a groove for inserting a thermocouple on the joint surface of the two; the electrode body is a variable-diameter structure, and the diameter gradually increases from top to bottom. The utility model can reduce the temperature of the bottom electrode by reducing the Joule heat generated by electrification, thereby reducing the probability of damage to related components; it can reduce the probability of short-circuit arcing caused by the infiltration of molten lead into the bottom of the furnace; it can make the liquid steel in the hole of the bottom electrode The convection slows down, thereby reducing the melting loss rate of sleeve bricks and prolonging their service life.
Description
Technical field
The utility model relates to the improvement of direct current electric arc furnace hearth electrode.
Background technology
Arc furnace is an apparatus for melting metal well known.Usually, the arc furnace of powering in the direct current mode needs at furnace bottom one cover electrode assembly (being generally anode) to be set, and produces electric arc in order to form power circuit, to make to be positioned between interior metal of stove and the graphite top electrode, thereby reaches the purpose of this kind of melting metal.Existing hearth electrode is divided into four class patterns usually, i.e. water cooled steel bar type, conduction furnace bottom formula, many large knitting needles formula and many steel discs formula.The utility model relates to the improvement of water cooled steel bar type bottom electrode structural.
In the prior art of water cooled steel bar type hearth electrode, basic and representational design is the United States Patent (USP) 5191592 of French CLECIM company in application in 1991.As shown in Figure 1 and Figure 2, its structural feature is: be provided with one or several electrode 10 at the bottom of the arc furnace, this electrode 10 is a material of the same race with the metal that will smelt usually, as is used for steel-making, then is rod iron.This electrode 10 is 250mm for equal diameter and representative diameter from top to bottom, and electrode 10 runs through furnace bottom 30, its upper end with contacted by smelting metal, the lower end passes furnace bottom 30 and enters in the water collar 40, and joins by water collar 40 and power supply.Water collar 40 comprises inner water sleeve 41, outer water jacket 42, water collar flange 44, inner water sleeve 41 is structure as a whole with water collar flange 44, water collar flange 44 upper surfaces link to each other with another adpting flange 50 by bolt, adpting flange 50 links to each other with furnace bottom 30 by bolt, and furnace bottom 30 then links to each other with the furnace shell (not shown) by latch.Usually, furnace shell must be a ground connection, and between water collar flange 44 and the adpting flange 50, be equipped with insulating part 60 between adpting flange 50 and the furnace bottom 30, makes electrode 10 and furnace shell insulation.The electrode 10 outer quality refractory material sleeve bricks 20 closely that are with, its modular design is three joint sleeve bricks, as sleeve brick among Fig. 2 20.For safety, the internal diameter of adpting flange 50 needs the external diameter greater than sleeve brick 20, forms an annulus 100 therebetween, and this space is by amorphous refractory 90 fillings.
Because usually contain certain beavy metal impurity in the steel scrap, as lead, they can pass refractory material gradually and be sink to furnace bottom in steelmaking process, after the long-term accumulation even can between hearth electrode and furnace shell, cause short circuit and accidents caused.For this reason, between adpting flange 50 and furnace bottom 30, be provided with one and lead lead pan 70, lead 30 of lead pan 70 and furnace bottoms and be provided with little gap so that plumbous liquid is got rid of.Simultaneously, on furnace bottom 30, also offer suitable lead discharging hole 301, in addition, also be provided with the back-up ring 80 of the plumbous liquid of guiding so that near the plumbous liquid the furnace shell is got rid of.Yet, do not hide annulus 100 fully because of leading lead pan 70, plumbous liquid can enter this space and arrive water collar flange 44 upper surfaces, like this, water collar flange 44 upper surfaces, plumbous liquid, lead lead pan 70,30 of furnace bottoms just may form path.In other words, alleviated plumbous deposition to a certain extent, shortened the distance of water collar flange 44 upper surfaces and furnace bottom 30 greatly, thereby the probability of short circuit can increase greatly to furnace bottom 30 hearth electrode places though lead lead pan 70.In actual production process, can often find water collar flange 44 upper surfaces, lead in the lead pan 70 along by the vestiges of discharge calcinations, serious also water collar flange 44 can being punctured cause leaking, and and then the serious accident that molten steel passes furnace bottom 30 takes place.
The fail safe of hearth electrode is also closely related with the hot state of electrode 10.The influencing factor of the hot state of hearth electrode mainly is the cooling situation of water collar, the heat transfer that the molten steel in the stove molten bath is downward, and hearth electrode when energising the Joule heat that produces.Cooling structure aspect, water collar 40 are by inner water sleeve copper sheathing 41, and outer water jacket steel bushing 42 is formed, and bosh 43 is spiral equidistant tank, is positioned at inner water sleeve copper sheathing 40 1 back sides, and is evenly distributed from top to bottom, and cooling is uniform.Usually, the fusing face of direct current electric arc furnace hearth electrode rod iron after smelting certain hour continuously that CLECIM company is designed can be deeply to water collar, therefore water collar flange 44 upper surfaces are that the copper sheathing bight can directly contact with molten steel with the joint portion of hearth electrode sleeve brick 20, and it is the thickest because of the copper wall herein, its cooling condition is the poorest, therefore, if the molten steel temperature of contact is too high with it, particularly cause two sides, inner water sleeve copper sheathing 41 bight all to contact high-temperature molten steel, then may make it produce local melting if sleeve brick 20 bottoms produce melting loss.Observed this phenomenon in the actual production process.And from top to bottom heat load obviously is uneven in the water collar 40, the upper temp height, and heat load is big, and the bottom is then much smaller relatively, therefore, should make cooling concentrate on top.Not only there is the heat conduction from molten steel in the stove origin of heat aspect of hearth electrode, the Joule heat that produces when most importantly switching on.Calculating shows that the Temperature Distribution in the hearth electrode is extremely inhomogeneous, if its underpart temperature is too high, then can produce strong convection current, the melting loss that this can quicken the sleeve brick bottom greatly causes molten steel to ooze out, and make furnace bottom often be in high hot state, increased the probability that associated components damages.
In addition, thermocouple 110 is inserted in the water collar flange 44, because 110 measuring points of this thermocouple are in water collar 40 inner water sleeve copper sheathings 41 inside, promptly very near bosh 43, so be difficult near the hot state in sensitive reaction water collar flange 44 upper surfaces.
Summary of the invention
The purpose of this utility model is to provide a kind of improvement structure of DC arc furnace bottom electrode, with hot state that improves hearth electrode and the harm that prevents lead, thus the fail safe of increase hearth electrode, and its service life is prolonged.
The technical solution of the utility model is: DC arc furnace bottom electrode comprises at least one electrode body, sleeve brick, water collar, leads lead pan; Wherein, described electrode body inserts the arc furnace furnace bottom; Sleeve brick is coated on electrode body; Offer several boshes on the water collar, be fixedly connected by water collar flange, adpting flange and arc furnace furnace bottom; Lead lead pan and be arranged between adpting flange and the furnace bottom, the one end stretches out the adpting flange outer end; Also be provided with high-order tray, low level steel disk; Described high-order tray is arranged in the arc furnace body of heater, is positioned to lead the lead pan top; Described low level steel disk is fixed in water collar flange upper surface; Described electrode body is for becoming diameter structure.
Further, described high-order tray has facade in, and its outer is an inclined-plane, and its internal diameter is slightly larger than corresponding sleeve brick external diameter less than the adpting flange internal diameter, and its external diameter is greater than leading the lead pan internal diameter.
The described lead pan internal diameter of leading is greater than the adpting flange internal diameter, but less than high-order tray external diameter, promptly leads lead pan and do not extend out in the space that sleeve brick lateral surface and adpting flange medial surface surrounded.
The internal diameter of described low level steel disk be slightly larger than the external diameter of corresponding sleeve brick, its external diameter is equal to or slightly less than the water collar flange diameter.
Described electrode body diameter from top to bottom becomes greatly gradually, and the bottom is an equal diameter.
Again, but described electrode body also top be equal diameter, middle part diameter from top to bottom becomes greatly gradually, the bottom also is an equal diameter.
Described electrode body upper diameter φ 1 is 250～300mm, and its height h1 is 400～500mm; It is big that the middle part diameter becomes from top to bottom gradually, and its top diameter equals the diameter on electrode body top, and its base diameter equals the diameter of electrode body bottom, and its height h2 is 500～700mm; Lower diameter φ 3 is 300～350mm, and its height h3 is 950～1050mm.
Described electrode body become diameter parts on go to the bottom internal diameter difference 1/2nd with the ratio of its height less than 0.1.
Adopt this kind structural reason to be, hearth electrode is by there being powerful electric current when smelting, can produce very big Joule heat in the electrode body this moment, hearth electrode electrode body lower diameter is increased, then can reduce the resistance of electrode body significantly, thereby effectively reduce the Joule heat that the electrode body bottom produces and improve near it hot state.Improve that effect that hot state brings is main two aspects: one, before address, liquidus surface will be deeply to copper sheathing inside after smelting the number stove continuously for the CLECIM hearth electrode, the possibility that the existence of this kind situation causes serious accident takes place increases greatly, and adopt structure of the present utility model, to make liquidus surface maintain certain distance on the water collar flange upper surface, thereby fail safe is obviously improved; Its two, the reduction of Yin Wendu and the convection velocity of molten steel in the hearth electrode hole is reduced can slow down the melting loss speed of sleeve brick bottom greatly, thereby prolong the useful life of sleeve brick.And top is set to less diameter, then is based on the consideration of two aspects, and one is avoided a large amount of heat transfers of molten steel in the stove of top downwards; Its two, because of the top, refractory material hole at hearth electrode place in smelting process gradually melting loss enlarge, adopt less diameter electrode body then can not make the very fast expansion in this top, hole excessive and bring other harms.
The described electrode body sleeve brick that is coated on is from top to bottom also for becoming internal diameter, to adapt to the electrode body diameter variation.
Described sleeve brick is made up of four joints, and top first segment sleeve brick is the cylinder of uniform internal diameter from top to bottom; The middle part second joint sleeve brick is from top to bottom for becoming the internal diameter cylinder; Middle part the 3rd joint sleeve brick is divided into two parts from top to bottom, and top is for becoming the internal diameter cylinder, and the bottom is the uniform internal diameter cylinder; Bottom the 4th joint sleeve brick is the cylinder of uniform internal diameter.
The tapering of the described second joint sleeve brick, the difference of the internal diameter of promptly going to the bottom on it 1/2nd with the ratio of height, and the tapering on the 3rd joint sleeve brick, with the tapering at the middle part of electrode body change diameter, the three is identical value, and this value is no more than 0.1.
Sleeve brick adopts this kind structural reason to be, when smelting process stopped and longer blowing out is arranged, this cognition of hearth electrode was solid phase by liquid phase cools, and this moment, electrode body can produce bigger amount of contraction; Another kind of situation is, when stove when cold conditions begins energising and smelts, electrode body can produce bigger swell increment again.Because of electrode body in the utility model is change diameter pattern, then above-mentioned two kinds of situations all can produce bigger compression to sleeve brick, and this compression might cause the sleeve brick breakage.Therefore, be different from the mode that general CLECIM bottom electrode structural adopts three joint sleeve bricks, the utility model has adopted four joint sleeve bricks, and the benefit of this kind structure is: one, help the lax to a certain extent compression of expanding with heat and contract with cold and causing because of electrode body; Two, if certain joint sleeve brick cracks, less because of the sleeve brick height, then its influence area is also less; In addition, the size of above-mentioned compression is also relevant with the tapering of change diameter parts in the sleeve brick, and tapering is more little, and then the compression of Chan Shenging is also more little.
Again, have the groove that at least one heat supply galvanic couple inserts on the faying face of described water collar flange and low level steel disk, this thermocouple is used to monitor near the hot state the water collar flange upper surface.
Bosh on the described water collar is arranged as the upper tightly lower sparse structure; The water collar bottom corner is provided with a bosh, so that cooling concentrates on top and strengthens the bight cooling.
Advantage of the present utility model is:
1. can reduce the Joule heat of energising generation significantly and the hearth electrode temperature is reduced, thereby reduce the probability that associated components damages.Liquidus surface is maintained on the water collar flange upper surface, thereby fail safe is obviously improved; Simultaneously, the convection velocity of molten steel in the hearth electrode hole is reduced, the melting loss speed of slowing down sleeve brick greatly, thereby the useful life of prolongation sleeve brick.
2. can reduce greatly because of plumbous liquid infiltrates the probability that furnace bottom causes the short circuit starting the arc, can protect effectively that the water collar end face of flange is unlikely to be damaged because of the starting the arc.
3. can improve the cooling condition of hearth electrode rod iron, particularly improve the cooling condition in copper sheathing bight, reduce the probability of its local melting.
4. can effectively monitor near the hot state that the water collar flange is, be convenient to before serious accident occurring, take measures.
Description of drawings
Fig. 1 is the structural representation of CLECIM company DC arc furnace bottom electrode device;
Fig. 2 is a structural representation of the present utility model;
Fig. 3 is the partial enlarged drawing of Fig. 2;
Fig. 4 is the schematic diagram of the high-order tray of the utility model;
Fig. 5 is the schematic diagram of the utility model low level steel disk;
Fig. 6 is the size relationship schematic diagram of the utility model electrode body and sleeve brick.
Embodiment
As shown in Figures 2 and 3, DC arc furnace bottom electrode of the present utility model comprises several electrode bodies 1, sleeve brick 2, water collar 4, leads lead pan 8, high-order tray 9, low level steel disk 6; Wherein, described electrode body 1 inserts arc furnace furnace bottom 3, its upper end with contacted by smelting metal, the lower end passes furnace bottom 3 box hats and enters in the water collar 4, and joins by water collar 4 and power supply; Sleeve brick 2 is coated on electrode body 1; Water collar 4 comprises inner water sleeve 401, outer water jacket 402, on offer several boshes 403, water collar flange 5, inner water sleeve 401 is structure as a whole with water collar flange 5, water collar flange 5 upper surfaces link to each other with adpting flange 7 by bolt, adpting flange 7 links to each other with furnace bottom 3 by bolt, is equipped with insulating part 10 between water collar flange 5, adpting flange 7, the arc furnace furnace bottom 3, makes electrode body 1 and furnace bottom 3 insulate; Lead lead pan 8 and be arranged between adpting flange 7 and the furnace bottom 3, adpting flange 7 outer ends are stretched out in its outer end, and its internal diameter is greater than adpting flange 7 internal diameters, but less than high-order tray 9 external diameters, lead 3 of lead pan 8 and furnace bottoms and be provided with little gap so that plumbous liquid is got rid of; On furnace bottom 3, also offer simultaneously suitable lead discharging hole 31 so that near the plumbous liquid the furnace shell is got rid of, also be provided with the back-up ring 32 of the plumbous liquid of guiding in addition; Described high-order tray 9 is arranged in the arc furnace body of heater, is positioned to lead lead pan 8 tops; Described low level steel disk 6 is fixed in water collar flange 5 upper surfaces; Described electrode body 1 is for becoming diameter structure.
See also Fig. 6 again, described electrode body 1 is divided into three parts in upper, middle and lower for becoming diameter structure, and electrode body 1 top 101 is equal diameter, and its diameter phi 1 is between 250～300mm, and its height h1 is between 400～500mm; Middle part 102 is Diameter Gradual Change from top to bottom, and its height h2 is between 500～700mm; Bottom 103 is an equal diameter, and its diameter phi 3 is between 300～350mm, and its height that exceeds water collar flange 5 upper surfaces is between 500～600mm, and promptly height h3 is 950～1050mm.
The electrode body 1 outer sleeve brick 2 that is made of the density fireproof material that is with, this sleeve brick 2 is made up of four joints from top to bottom.Top first segment sleeve brick 21 is the cylinder of wall thickness such as uniform internal diameter from top to bottom, and wall thickness is between 125～150mm, and its height h21 is less than the height h1 on electrode body 1 top 101.The second joint sleeve brick 22 is wall thickness cylinders such as change internal diameter from top to bottom, and the variation of its internal diameter and electrode body 1 middle part 102 vary in diameter adapt, and suitable little gap is arranged therebetween, and its wall thickness is between 125～150mm, and its height h22 is between 350～450mm.The 3rd joint sleeve brick 22 is divided into two parts from top to bottom, top is wall thickness cylinders such as change internal diameter, the variation of its internal diameter and electrode body 1 middle part 102 vary in diameter adapt, suitable little gap is arranged therebetween, its thickness is between 125～150mm, and it highly just in time equals the height h2 at electrode body 1 middle part 102 with the height addition of the second joint sleeve brick 22; The bottom of the 3rd joint sleeve brick 23 is wall thickness cylinders such as uniform internal diameter, the diameter of its internal diameter and electrode body 1 bottom 103 is suitable, suitable little gap is arranged therebetween, its wall thickness is between 125～150mm, and its height just in time equals the height that electrode body 1 bottom 103 exceeds water collar flange 5 upper surfaces with the height h24 addition of the 4th joint sleeve brick 24.The tapering of the second joint sleeve brick 22, the difference of the internal diameter of promptly going to the bottom on it 1/2nd with the ratio of height, and the tapering that becomes on the internal diameters of the 3rd joint sleeve brick 23, with the tapering at the middle part of electrode body 1 change diameter, the three is identical value, and this value is no more than 0.1.Bottom the 4th joint sleeve brick 24 is the cylinder of wall thickness such as uniform internal diameter from top to bottom, the diameter of its internal diameter and electrode body 1 bottom 103 is suitable, suitable little gap is arranged therebetween, its wall thickness is between 50～80mm, its height h24 is between 350～400mm, and its base part seat is on water collar flange 5 upper surfaces during assembling.
See also Fig. 3 and Fig. 4, be provided with a high-order tray 9, be positioned at and lead 90～110mm place, lead pan 8 tops.This high position tray 9 has facade 91 in, flows to hearth electrode rod iron direction in order to prevent plumbous liquid; Its outer is an inclined-plane, and it is dirty to be beneficial to plumbous liquid.High-order tray 9, the spatial relationship of leading 7 of lead pans 8, adpting flange be, high-order tray 9 internal diameters are less than adpting flange 7 internal diameters but be slightly larger than sleeve brick 2 external diameters; Lead lead pan 8 internal diameters greater than adpting flange 7 internal diameters; High-order tray 9 external diameters are greater than leading lead pan 8 internal diameters.High-order tray 9 is set can make near the probability in space 13, plumbous liquid inflow water collar flange 5 upper surfaces reduce; Simultaneously, because of the existence of high-order tray 9 is arranged, historical facts or anecdotes has showed the internal diameter that will lead lead pan 8 and has enlarged, make it not extend out to the space 13 that sleeve brick 2 lateral surfaces and adpting flange 7 medial surfaces are surrounded, like this, may just be extended by the path that plumbous liquid is connected between water collar flange 6 upper surfaces and the furnace bottom 3, thereby effectively reduce the probability that is short-circuited.In addition, because of high-order 9 mosts of the time of tray are in high temperature, for prolonging its useful life, its thickness should be bigger, as between 10～15mm; Its material is selected heat-resistance stainless steel, and requirement is that high temperature oxidation resistance is strong, fusing point is higher, as austenitic stainless steel 310.
See also Fig. 3, one low level steel disk 6 is set being close to water collar flange 5 upper end surfaces, this low level steel disk 6 closely contacts with water collar flange 5 upper surfaces, its internal diameter is slightly larger than sleeve brick 24 external diameters, its external diameter is equal to or slightly less than water collar flange 5 upper surface diameters, and have the connecting hole corresponding on it, water collar flange 5, low level steel disk 6, insulating part 10, adpting flange 7 can be coupled together by bolt with water collar flange 5.The effect of low level steel disk 6 is, if still have a small amount of plumbous liquid to enter space 13 and make water collar flange 5 and 3 of furnace bottoms have formed short circuit, then can further protect the damage to water collar flange 5 upper surfaces that causes because of the short circuit starting the arc.
See also Fig. 5 again, have 3 radial grooves 61 on the described low level steel disk 6, accordingly, also have the groove (not shown) of appropriate depth and width in water collar flange 5 upper surfaces, be used for interspersed thermocouple 12, as shown in Figure 2, with near the hot state supervision water collar flange 5 upper surfaces.This point is different with former CLECIM design, as shown in Figure 1, its scheme is that thermocouple 110 is inserted in the water collar flange 44, because 110 measuring points of this thermocouple are in water collar copper sheathing inside, promptly very near bosh 43, so be difficult near the hot state in sensitive reaction water collar flange 44 upper surfaces.
In sum, the utility model is in the simplicity that keeps structure, and under the prerequisite that keeps new black furnace startup and regular maintenance convenience, in the hot state that improves hearth electrode and prevent that plumbous destruction two aspects to insulation all have than the better effect of prior art, therefore can make the direct current electric arc furnace production process more safe and reliable, effectively avoid the generation of serious accident; Structure of the present utility model also helps to prolong the service life of hearth electrode simultaneously, and it saves the expense of changing furnace bottom, the benefit that improves the effective operation time all can be expected.
Claims (13)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03230028.XU CN2613123Y (en) | 2003-04-03 | 2003-04-03 | DC arc hearth electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03230028.XU CN2613123Y (en) | 2003-04-03 | 2003-04-03 | DC arc hearth electrode |
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| Publication Number | Publication Date |
|---|---|
| CN2613123Y true CN2613123Y (en) | 2004-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN03230028.XU Expired - Lifetime CN2613123Y (en) | 2003-04-03 | 2003-04-03 | DC arc hearth electrode |
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| CN (1) | CN2613123Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353235A (en) * | 2013-07-26 | 2013-10-16 | 朱兴发 | Embedded slag type structure of heating element electrodes of electromagnetic induction slag smelting furnace |
| CN104154738A (en) * | 2014-08-26 | 2014-11-19 | 攀钢集团攀枝花钢铁研究院有限公司 | Bottom electrode of direct current arc furnace |
| CN113776325A (en) * | 2020-06-10 | 2021-12-10 | 中冶宝钢技术服务有限公司 | Air cooling device for bottom electrode connecting bolt and installation and use method thereof |
| CN115127353A (en) * | 2022-06-15 | 2022-09-30 | 中冶赛迪工程技术股份有限公司 | Long-life transverse air-cooled direct-current arc furnace bottom electrode |
-
2003
- 2003-04-03 CN CN03230028.XU patent/CN2613123Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353235A (en) * | 2013-07-26 | 2013-10-16 | 朱兴发 | Embedded slag type structure of heating element electrodes of electromagnetic induction slag smelting furnace |
| CN104154738A (en) * | 2014-08-26 | 2014-11-19 | 攀钢集团攀枝花钢铁研究院有限公司 | Bottom electrode of direct current arc furnace |
| CN104154738B (en) * | 2014-08-26 | 2015-10-28 | 攀钢集团攀枝花钢铁研究院有限公司 | The hearth electrode of direct current electric arc furnace |
| CN113776325A (en) * | 2020-06-10 | 2021-12-10 | 中冶宝钢技术服务有限公司 | Air cooling device for bottom electrode connecting bolt and installation and use method thereof |
| CN113776325B (en) * | 2020-06-10 | 2024-04-26 | 中冶宝钢技术服务有限公司 | Air cooling device for bottom electrode connecting bolt and mounting and using method thereof |
| CN115127353A (en) * | 2022-06-15 | 2022-09-30 | 中冶赛迪工程技术股份有限公司 | Long-life transverse air-cooled direct-current arc furnace bottom electrode |
| CN115127353B (en) * | 2022-06-15 | 2024-09-13 | 中冶赛迪工程技术股份有限公司 | Long-life horizontal air-cooled direct current arc furnace bottom structure |
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