CN203100422U - Electric-arc furnace continuously feeding device preheated by smoke - Google Patents
Electric-arc furnace continuously feeding device preheated by smoke Download PDFInfo
- Publication number
- CN203100422U CN203100422U CN 201320081791 CN201320081791U CN203100422U CN 203100422 U CN203100422 U CN 203100422U CN 201320081791 CN201320081791 CN 201320081791 CN 201320081791 U CN201320081791 U CN 201320081791U CN 203100422 U CN203100422 U CN 203100422U
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- smoke
- feeding
- electric arc
- arc furnaces
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Abstract
The utility model discloses an electric-arc furnace continuously feeding device preheated by smoke. The electric-arc furnace continuously feeding device preheated by the smoke comprises a double-duct material transmission groove and a smoke guiding cover, wherein a material carrying board with a smoke passageway is arranged in the middle of the double-duct furnace material transmission groove, a material circulation duct is arranged above the material carrying board, a smoke circulation duct is arranged under the material carrying board, and a seal door which is matched with an opening formed in the upper portion of the lower end of the material circulation duct is arranged on the smoke guiding cover. Due to the fact that the double-duct material transmission groove forms a smoke dispersion heat exchange structure where smoke moves from bottom to top, the contact area of materials and high-temperature smoke is enlarged, residence time of the smoke is long, and the preheating effect of the materials is greatly improved. The double-duct material transmission groove is arranged in an inclined mode, feeding points are increased, the oblique angle of the material groove is larger, steel scrap material dropping points approach to a central high-temperature area of a furnace more easily, and a cold area phenomenon is eliminated. Due to the adoption of dispersion penetration heat exchange, smoke and dust in exhausted smoke are greatly reduced, the flow direction of the smoke better conforms to a natural law, and problems such as the blocking of an exhaust tube are solved.
Description
Technical field
The utility model relates to a kind of metallurgical equipment, particularly a kind of feeding device of electric arc furnaces.
Background technology
Energy-conservation in the electric furnace steel making, consumption reduction, environmental protection are one of core technologies of global Electric Furnace Steelmaking development always.Multiple design was arranged over 20 years both at home and abroad, but because its technical difficulty is very big, only have a spot of technology to drop into actual the use at present, the CONSTEEL(US5400358-1992 of its typical case's representative as finger shaft furnace (DE4025249A1-1992), thruster vertical shaft reinforced (US2007/0013112A1), vibration continuous charging) technology.Wherein, the reinforced preheating of vertical shaft is because flue gas penetrates the steel scrap layer, and pre-heating energy-saving is effective, can reach ton steel a 60～100kw.h, but equipment smashes by steel scrap easily, and maintenance is big to influence production.And CONSTEEL is a kind of horizontal continuous-feeding technology, can realize the smelting of electric furnace stabilising arc, environmental protection and consumption of electrode reduce, can reduce the production process expense of electric furnace greatly, but this method steel scrap has only upper materials to be heated, so the steel scrap pre-heat effect is not good, according to reporting that both at home and abroad average energy-saving effect has only a ton steel 25kw.h; In addition, owing to will improve and raw material (steel scrap) heat exchange efficiency, the steel scrap in the delivery chute is piled height ratio on conveyer belt thinner, and this must strengthen the length of preheating section, and the equipment total length can reach 90～100m, and this layout to the workshop is very disadvantageous; This method dynamic seal (packing) gas leakage is more serious once more, and is bigger to the capacity requirement of blower fan etc.
For improving the heat exchange efficiency in the continuous conveying process, the utility model people once proposed step trough heat exchange structure for conveying (ZL201010270535.2), increase the contact area of flue gas and material (steel scrap) by the downward disperse flue gas in ladder slit, improve the utilization ratio of fume afterheat.But find in the actual popularization process to take out technology owing to having adopted under the flue gas distributing, particle in small, broken bits is inhaled into more tiny exhaust tube, sedimentation bonding back blocking pipe easily in the material, the negative pressure of bleeding makes frivolous material fit and stops up the slit of ladder, numerous exhaust tube, the total mouths of smoking in ladder bottom has two, inside and outside pipe-line system is complicated, installation, difficult in maintenance, so this technology can't enter the engineering practicality.
The utility model content
In view of this, the purpose of this utility model provides a kind of electric arc furnaces continuous feeding that utilizes smoke pre-heating, advantages such as it has short, the pre-thermal efficiency height of charging (feeding) equipment, reinforced impact is little, exhaust tube is difficult for stopping up, equipment failure rate is little can solve the problem that existing charging (feeding) equipment exists.
The utility model utilizes the electric arc furnaces continuous feeding of smoke pre-heating, comprise two duct feeding grooves and smoke guiding cover, the described pair of duct feeding groove is obliquely installed with feed end height, form that discharge end is low, described pair of duct feeding groove middle part is provided with the material containing plate of band exhaust gases passes, material containing plate top is the material stream passed duct, material containing plate below is flue gas circulation duct, the top of described material stream passed duct is opening, the high-end sealing of described flue gas circulation duct, described smoke guiding cover is provided with the hermatic door that cooperates with material stream passed duct low side upper opening.
Further, the low side of described flue gas circulation duct be longer than the low side of material stream passed duct and grow part form be connected with electric furnace go into the stove section;
Further, the high-end material feeding section that is provided with of described material stream passed duct;
Further, described material containing plate is made up of the cell board that vertically is ladder-like arranged along two duct feeding grooves, and described exhaust gases passes is the gap between the adjacent cells plate, the folded mutually or butt joint of the orthographic projection of the end of adjacent cells plate on horizontal plane;
Further, described cell board becomes horizontally disposed or is in tilted layout along the material direction of advance, and described material containing plate is flat board or arc;
Further, the top of the upper opening of described material stream passed duct is provided with burner;
Further, the described electric arc furnaces continuous feeding of smoke pre-heating that utilizes also comprises the oscillation feed gear that is arranged on two duct feeding grooves bottom.
The beneficial effects of the utility model:
1, the utility model utilizes the electric arc furnaces continuous feeding of smoke pre-heating, compares with the CONSTEEL electric arc furnaces, owing to adopt skewed slot, conveying machinery efficient height; Because two duct feeding grooves form flue gas disperse heat exchange structure from bottom to top, material and high-temperature flue gas contact area strengthen, and the flue gas holdup time strengthens, and the material pre-heat effect improves greatly; Can adopt high windrow in the material stream passed duct, feeding device can be done shortlyer; Two duct feeding grooves are obliquely installed, and feed point improves, the hopper oblique angle is big, steel scrap material discharging point is easier of high-temperature region, stove center, eliminate or reduce the cold-zone phenomenon of electric arc furnaces existence; Disperse penetrates heat exchange, also greatly reduces the discharge dust in flue gas.
2, the utility model utilizes the electric arc furnaces continuous feeding of smoke pre-heating, compares with shaft furnace, owing to adopted approaching natural logistics to flow to (flue gas from the bottom up, material from top to bottom), the contact-making surface of flue gas and material is bigger, and resistance is also less; The conveying of the smooth inclination of material can be eliminated pernicious gas such as dioxin, provide condition for further strengthening the material pre-heat effect in conjunction with burner combustion; This device has been realized the continuous charging under the efficient preheating, and this is to reducing transformer capacity, reduce noise, reducing that electrical network impacts, to save electric energy favourable greatly.
3, the utility model utilizes the electric arc furnaces continuous feeding of smoke pre-heating, compare with the ZL201010270535.2 that is all step trough heat exchange structure for conveying, the structural change of two duct feeding groove flue gas flow direction, flue gas flow direction more meets the natural law, therefore problems such as particle in small, broken bits is inhaled into easily in the ZL201010270535.2 material, exhaust tube obstruction have been solved, the negative pressure of bleeding makes frivolous material that the trend of leaving the slit be arranged, and helps the gap ventilation and does not get stuck; The structure of the bleeding point of step trough has been simplified greatly, safeguards the simple while, and the ladder density of same length can improve more than 1 times, has increased the air penetrability of the hot flue gas of unit length, improves the pre-thermal efficiency of steel scrap; Device length is shorter under the same heat transfer intensity condition, can reduce first investment of equipment and long-term maintenance cost.
4, the utility model utilizes the electric arc furnaces continuous feeding of smoke pre-heating, by regulating the aperture of first hermatic door, can moderately regulate the temperature and the position of control material preheating; Fall into the material of flue gas circulation duct, the dust of sedimentation, also can be sent in the electric furnace, can improve recovery rate of iron and externally discharge with the reduction dust by skewed slot.
5, the utility model utilizes the electric arc furnaces continuous feeding of smoke pre-heating, safeguards fairly simple.Electric furnace flue gas dust ratio is easier to bonding, and the dust of caking or place some materials in flue gas letter road just can be under the state of vibrating transportation, thereby the dust cleaning telegram in reply stove assurance flue gas that condenses the unobstructed of duct that circulate.
Description of drawings
Fig. 1 utilizes the structural representation of the electric arc furnaces continuous feeding of smoke pre-heating for the utility model;
Fig. 2 is the structural representation of two duct feeding grooves.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As shown in the figure, present embodiment utilizes the electric arc furnaces continuous feeding of smoke pre-heating, comprise two duct feeding grooves 1 and smoke guiding cover 2, described pair of duct feeding groove 1 is with the feed end height, the form that discharge end is low is obliquely installed, described pair of duct feeding groove 1 middle part is provided with the material containing plate 3 of band exhaust gases passes, material containing plate 3 tops are material stream passed duct 11, material containing plate below is flue gas circulation duct 12, the top of described material stream passed duct 11 is opening, the high-end sealing of described flue gas circulation duct 12, described smoke guiding cover 2 is provided with the hermatic door 4 that cooperates with material stream passed duct 11 low side upper openings.
When adopting this device to feed in raw material, material is from the 11 high-end addings of material stream passed duct, and enters electric furnace from the low side of material stream passed duct 11.By regulating hermatic door 4 it is close on the material, smoke guiding cover 2 is connected with exhausting system by the hot cigarette bleeding point 21 on it, under taking out the subsystem effect, set up negative pressure in the smoke guiding cover 2, hermatic door 4 can prevent that the high-temperature flue gas in the electric furnace from entering smoke guiding cover 2 from the material top, high-temperature flue gas in the electric furnace enters flue gas circulation duct 12, and penetrates material by material containing plate 3 from the material below and enter the smoke guiding cover 2.Flue gas fully contacts with material in passing the material process, flue gas time of staying in material is longer, material can fully absorb flue gas heat, the material pre-heat effect improves greatly, and by regulating the aperture of hermatic door 4, adjusting material preheat temperature that also can be suitable and preheating position reach best pre-heat effect; Under identical pre-heat effect condition, this device size can shorten greatly.And two duct feeding grooves 1 are obliquely installed, and feed point improves, the hopper oblique angle is big, steel scrap material discharging point is easier of high-temperature region, stove center, reduce or eliminate the cold-zone phenomenon of the reinforced electric arc furnaces existence of sidewall; Flue gas is disperse from bottom to top, and dust in flue gas reduces greatly, has solved the line clogging problem.
As improvement to present embodiment, the low side of described flue gas circulation duct 12 be longer than the low side of material stream passed duct 11 and grow part form be connected with electric furnace go into stove section 5; This structure makes material be introduced into into stove section 5 after material stream passed duct 11 comes out, and enters electric furnace from going into stove section 5 again; High-temperature flue gas in the electric furnace need pass after material stream passed duct 11 is fallen into the material of stove section 5 and enter flue gas circulation duct, and flue gas carries out preheating in the process that penetrates material to material, and this structure can reduce the bore size of body of heater, and minimizing is leaked out.
As the improvement to present embodiment, the high-end material feeding section 6 that is provided with of described material stream passed duct 11, material feeding section 6 are used for cooperating with cold feed device 7, to accept the material that cold feed device 7 is discharged; Cold feed device 7 can be the long hopper of adjustable fortune, fixedly skewed slot, shaking chute, all kinds of conveyer belts etc.In concrete enforcement, the joint portion of cold feed device 7 and material feeding section 6 needs sealing, so that the high-temperature flue gas in the electric furnace can enter smoke guiding cover 2 under the exhausting system effect.
As the improvement to present embodiment, described material containing plate 3 is made up of the cell board that vertically is ladder-like arranged along two duct feeding grooves 1, and the cell board inclination angle can be designed to reverse adjusting; Described exhaust gases passes is the gap between the adjacent cells plate, and the orthographic projection of the end of adjacent cells plate on horizontal plane is folded mutually; This structure material containing plate 3 can avoid material to fall into flue gas circulation duct 12, also can avoid the material clamping stagnation exhaust gases passes from exhaust gases passes; Certainly, the orthographic projection of end on horizontal plane of adjacent cells plate also can become mated condition in concrete enforcement.Perhaps material containing plate 3 also can be the monoblock type plate of band air-vent, but the time needs the appropriate design air-vent in design, gets stuck and leaks material avoiding.
As the improvement to present embodiment, described cell board becomes to be in tilted layout along the material direction of advance, and it is more smooth that this structure can make material move; Certainly in different embodiments, it is horizontally disposed that described cell board also can become; In the present embodiment, described material containing plate 3 is dull and stereotyped, and it also can be arc in different embodiments certainly, and intensity is better, and can increase the ventilative gap of material.
As the improvement to present embodiment, the top of the upper opening of described material stream passed duct 11 is provided with burner 8, by pernicious gases such as De bioxin in the burner 8 incendivity flue gases, can reduce atmosphere pollution; Discharge high-temperature gas by burner 8 simultaneously, can carry out preheating, can further improve the material pre-heat effect the top layer material.
As improvement to present embodiment, this utilizes the electric arc furnaces continuous feeding of smoke pre-heating also to comprise to be arranged on the oscillation feed gear 9 of two duct feeding groove 1 bottoms, drive the material reach by oscillation feed gear 9, can make Flow of Goods and Materials more smooth and easy, can avoid the material clamping stagnation.
Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (7)
1. electric arc furnaces continuous feeding that utilizes smoke pre-heating, it is characterized in that: comprise two duct feeding grooves and smoke guiding cover, the described pair of duct feeding groove is obliquely installed with feed end height, form that discharge end is low, described pair of duct feeding groove middle part is provided with the material containing plate of band exhaust gases passes, material containing plate top is the material stream passed duct, material containing plate below is flue gas circulation duct, the top of described material stream passed duct is opening, the high-end sealing of described flue gas circulation duct, described smoke guiding cover is provided with the hermatic door that cooperates with material stream passed duct low side upper opening.
2. the electric arc furnaces continuous feeding that utilizes smoke pre-heating according to claim 1 is characterized in that: the low side of described flue gas circulation duct be longer than the low side of material stream passed duct and grow part form be connected with electric furnace go into the stove section.
3. the electric arc furnaces continuous feeding that utilizes smoke pre-heating according to claim 2 is characterized in that: the high-end material feeding section that is provided with of described material stream passed duct.
4. according to arbitrary described electric arc furnaces continuous feeding that utilizes smoke pre-heating among the claim 1-3, it is characterized in that: described material containing plate is made up of the cell board that vertically is ladder-like arranged along two duct feeding grooves, described exhaust gases passes is the gap between the adjacent cells plate, the folded mutually or butt joint of the orthographic projection of the end of adjacent cells plate on horizontal plane.
5. the electric arc furnaces continuous feeding that utilizes smoke pre-heating according to claim 4 is characterized in that: described cell board becomes horizontally disposed or is in tilted layout along the material direction of advance, and described material containing plate is flat board or arc.
6. the electric arc furnaces continuous feeding that utilizes smoke pre-heating according to claim 1, it is characterized in that: the top of the upper opening of described material stream passed duct is provided with burner.
7. the electric arc furnaces continuous feeding that utilizes smoke pre-heating according to claim 1 is characterized in that: also comprise the oscillation feed gear that is arranged on two duct feeding grooves bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320081791 CN203100422U (en) | 2013-02-22 | 2013-02-22 | Electric-arc furnace continuously feeding device preheated by smoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320081791 CN203100422U (en) | 2013-02-22 | 2013-02-22 | Electric-arc furnace continuously feeding device preheated by smoke |
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| Publication Number | Publication Date |
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| CN203100422U true CN203100422U (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320081791 Expired - Lifetime CN203100422U (en) | 2013-02-22 | 2013-02-22 | Electric-arc furnace continuously feeding device preheated by smoke |
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| CN (1) | CN203100422U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075881A (en) * | 2013-02-22 | 2013-05-01 | 中冶赛迪工程技术股份有限公司 | Continuous feeding device for electric arc furnace preheated by flue gases |
| CN107504820A (en) * | 2017-08-22 | 2017-12-22 | 江苏兴辉炉业科技有限公司 | Preheating furnace |
| CN110388830A (en) * | 2019-08-01 | 2019-10-29 | 中冶京诚工程技术有限公司 | Scrap preheater, arc-melting equipment and pre-heating mean |
-
2013
- 2013-02-22 CN CN 201320081791 patent/CN203100422U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075881A (en) * | 2013-02-22 | 2013-05-01 | 中冶赛迪工程技术股份有限公司 | Continuous feeding device for electric arc furnace preheated by flue gases |
| CN107504820A (en) * | 2017-08-22 | 2017-12-22 | 江苏兴辉炉业科技有限公司 | Preheating furnace |
| CN110388830A (en) * | 2019-08-01 | 2019-10-29 | 中冶京诚工程技术有限公司 | Scrap preheater, arc-melting equipment and pre-heating mean |
| CN110388830B (en) * | 2019-08-01 | 2024-02-06 | 中冶京诚工程技术有限公司 | Scrap steel preheating device, arc melting equipment and preheating method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130731 |