CN101825396A - Device for preheating and conveying scrap steel - Google Patents
Device for preheating and conveying scrap steel Download PDFInfo
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- CN101825396A CN101825396A CN201010170509A CN201010170509A CN101825396A CN 101825396 A CN101825396 A CN 101825396A CN 201010170509 A CN201010170509 A CN 201010170509A CN 201010170509 A CN201010170509 A CN 201010170509A CN 101825396 A CN101825396 A CN 101825396A
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Abstract
The invention discloses a device for preheating and conveying scrap steel, which comprises a conveying groove (1) obliquely formed relatively to the horizontal plane. A fume guide hood (2) is arranged on the conveying groove (1); the lower end of the conveying groove (1) extends into an electric furnace (A) through an opening on a side wall of the electric furnace (A); a bottom-open long distributing groove (D) is formed above the other end of the conveying groove (1) and is installed above a material receiving section of the conveying groove (1) through a lifting device (Q); the bottom-open long distributing groove (D) is in a top view projection of the material receiving section of the conveying groove (1) along a longitudinal direction; the scrap steel is longitudinally arranged at the groove bottom of the material receiving section of the conveying groove (1) in the form of strips; and the scrap steel (C) is fed into the electric furnace (A) through the conveying groove (1). The device has small length, high heat exchanging efficiency, low lifting operation rate, small wear and maintenance, energy conservation and environment friendliness, lowers investment and operation costs and uses new energy-saving and environment-friendly technology with popularization value on smelting processes, such as the electric furnace and the like.
Description
Technical field
The invention belongs to metallurgical technology field, relate to preheating of a kind of short flow process waste steel for electric furnace and continuous feeding.
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 there is a spot of technology to drop into actual the use at present, its typical case's representative is based on CONSTEEL (U.S. Patent number US5400358) technology of vibration continuous charging, this is a kind of horizontal continuous-feeding technology, can realize the smelting of electric furnace stabilising arc, environmental protection and consumption of electrode reduce, and can reduce the production process expense of electric furnace greatly.But from domestic and international actual the use, because this technology adopts the magnetic disc suspending material-uploading style, device length is longer, and especially material feeding section in rear portion can reach 60m to large-scale electric furnace, and the equipment total length can reach 90～100m, and this layout to the workshop is very disadvantageous; Secondly, 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, once more, the plant maintenance amount of this system is bigger, dynamic seal (packing) gas leakage is more serious, and is bigger to the capacity requirement of blower fan etc.
Simultaneously for improving the heat exchange efficiency of consteel technology, improvement to consteel was all arranged both at home and abroad, as the end of the nineties and the beginning of this century domestic some enterprise adopted the technology of smoking gas at the bottom of a kind of both sides, this technical characterictic be two side channels for double-deck, the both sides interlayer is an exhaust gases passes.Flue gas enters from top layer, from the exhaust gases passes outflow of both sides, to improve heat exchange efficiency.
In addition for shortening the material feeding segment length, the mode (application number is 200620082237.X, 200420039490.8) that adopts hydraulic pressure to push, but because steel scrap is special-shaped, different in size, this method is to the bad adaptability of steel scrap, easily producing the probability that gets stuck in actual production can be very high, and in addition, its reinforced process is an intermittent feeding.
Above-mentioned improvement does not have the consteel conveying principle and how to break through.In fact, consteel is a horizontal feed, and the motion of steel scrap must overcome steel scrap friction in the reciprocating motion process in groove, and this has increased mechanism's through-put power on the one hand, has also increased the wearing and tearing of equipment on the other hand.
Summary of the invention
The object of the invention is to provide a kind of device for preheating and conveying scrap steel of lacking flow process, high-efficiency and continuous conveying.
The present invention is achieved through the following technical solutions:
A kind of device for preheating and conveying scrap steel, comprise the steel scrap preheating delivery chute that is obliquely installed with horizontal plane, described steel scrap preheating delivery chute is provided with smoke guiding cover, described steel scrap preheating delivery chute low side is stretched in the electric furnace by the side-wall hole of electric furnace, it is characterized in that: described delivery chute other end top is provided with the microscler distributing trough of drop-bottom, steel scrap is contained in the microscler distributing trough of drop-bottom, the handling equipment is transported to the top of delivery chute away from the electric furnace end with the microscler distributing trough of drop-bottom, longitudinally within the downward projection of delivery chute rear portion material feeding section, steel scrap opens the door by vertical elongated bottom land that is placed on delivery chute material feeding section from the microscler distributing trough of drop-bottom bottom the microscler distributing trough of drop-bottom.
The microscler distributing trough of described drop-bottom bottom is equipped with door or the finger shape carriage of opening along its length downwards, and such is simple in structure.
Be preheated effect for improving steel scrap, carrying the bottom land of skewed slot is ladder superposing type structure, and every two-layer handing-over slit is a bottom land smoking mouth, each bottom land smoking open height 100～400mm, and width and bottom land are with wide; Be provided with the Turbogrid plates of some band gradients before smoking at the bottom of each skewed slot mouthful, the effect of Turbogrid plates have following some, what a) guarantee that steel scrap smokes mouthful at the bottom of step slot seamlessly transitting, the elimination steel scrap is to the impact in high-rise cooled plate forward position; B) the built on stilts bottom land steel scrap in mouthful the place ahead of smoking guarantees ventilative area; C) prevent that steel scrap from entering end smoking mouth and end exhaust tube; D) can strengthen the staggered superposing type structure of the ladder of skewed slot.Under the effect of bottom land smoking mouth and Turbogrid plates, the steel scrap layer becomes exhaust gases passes, and the gap that flue gas must penetrate steel scrap just can be drawn out of.
Crack, the end also can be set in each section of skewed slot junction smoke mouthful to increase low rate of air sucked in required, at this moment, Turbogrid plates should be designed to break away from shape with upper strata or lower floor, to guarantee both relative motion can be arranged.
Described lower floor's base plate of smoking mouth has connected end exhaust tube, and end exhaust tube inserts the fixedly interface socket of exhaust tube, overcoat flexible seal device.
The smoke guiding cover afterbody is provided with the adjusting mouth.The adjusting mouth of smoke guiding cover afterbody links to each other with expansion chamber with smoke combustion by the pipeline that has control valve, regulates the movable sealing that mouth and control valve constitute adjustable steel scrap inlet.
Smelting equipment work flue gas is full of the cavity volume that whole steel scrap preheating carries skewed slot and smoke guiding cover to constitute, and regulating mouth has three effects, one: prevent that extraneous air steel scrap inlet from entering steel scrap layer top; It two prevents from or reduces flue gas to enter the outside air from steel scrap inlet; Its three: provide flue gas flow to regulate to the steel scrap layer of different air permeabilities.This regulates the aperture of mouth fit adjustment valve, and the smoking ability always of guaranteeing satisfies production requirement.Most of flue gas that smelting equipment produces penetrates steel scrap and smokes by bottom land and mouthful extracted out step by step by preceding beginning, finishes the heat exchange with whole steel scrap layer, fraction flue gas and leak the air that enters and mix through regulating mouth and extract out; The contact area of this method flue gas and steel scrap and heat exchange efficiency are far above having only the surface heated consteel of steel scrap system.Possible metallic dust sedimentation also is better than the consteel system, and meaning has higher recovery rate of iron.
Pine for cold air in advance and be inhaled in order to prevent steel scrap, between dynamic skewed slot and smoke guiding cover, dynamic sealing device is set, more owing to carry skewed slot to begin to extract out step by step flue gas from anterior bottom land in whole steel scrap preheating, during the adjusting mouth position of the smoke guiding cover afterbody above skewed slot, exhaust gas volumn is just very little, if flue gas is emerged from the steel scrap inlet, just strengthen the rate of air sucked in required of regulating mouth, this air suction mode can reduce the seal request to material feeding zone movable sealing on the one hand, can reduce the cold air that the steel scrap inlet bleeds on the other hand, reduce and mix wind, improve the discharge temperature of flue gas, reduce the power and the requirement of exhausting amount of exhausting system blower fan, improve the efficient and the steam production capacity of follow-up afterheat boiler system steam, can save the whole system operation energy consumption greatly.It is pointed out that mouthful ability enough (flue gas does not leak) if bottom land is smoked, the rate of air sucked in required of adjustable as far as possible minor adjustment mouth then, this is extremely important to preventing that cold air is inhaled into.
Delivery chute tilts to install, and utilizes the vibration of gravity and vibrator that the controlled system of steel scrap is imported electric furnace, and the inclination component of gravity has been determined traffic direction and power is provided that the vibrator vibration can be carried out speed control.The steel scrap preheating carries skewed slot structurally to be divided into plurality of sections according to arts demand and quick maintenance requirement, as goes into stove section, preheating section and material feeding section, adopts connecting rod suspension or alternate manner to support, and each section can be installed exciting device, produces the exciting force of level of approximation.
In these apparatus and method, because adopting, delivery chute tilts to install, the throughput direction and the carrying capacity of steel scrap depend on partical gravity, note the angle that groove tilts and be used, the too small unfavorable steel scrap in inclination angle (3～5 °) is carried, inclination angle excessive (＞25 °) easily makes steel scrap carry too fast easy unstability out of control, but this characteristics can be at some position, as being used at the material feeding point.
Because groove tilts, the form of exciting device is various, also fairly simple, as twin shaft altogether exciting in distress, four excitings, six excitings, hydraulic vibration, pneumatic vibration or the like, as long as the steel scrap preheating carries skewed slot with simple resonance wave (vibration of rotation oscillator mechanical type) or reciprocal square wave or other (hydraulic pressure or pneumatic) horizontal by a small margin double vibrations, and have rational inclination angle just just the steel scrap layer in the groove carry to low by height, this is than the simply also easier variation of consteel vibration source, but excitation structure in distress is simple altogether for twin shaft, the preferential use.
The great advantage that delivery chute tilts is to have utilized the steel scrap self gravitation to carry, suitable angle of inclination cooperates suitable exciting force (littler than horizontal feed), can so that during the downward slippage of steel scrap near or (being optimum efficiency) at the bottom of the releasing slots fully near breaking away from, reduce the wearing and tearing of steel scrap greatly to bottom land, improve the life-span of delivery chute, subtract the maintenance of equipment.
For electric furnace, steel scrap preheating and feeding device, the charging means of transportation of reliable and compact steel scrap is a difficult problem, 1) special-shaped characteristic, the size length thickness owing to steel scrap differs, so can finish steel scrap charging and discharge unobstructed available instrument just very limited, common have material basket, magnetic disc suspending, a hopper; 2) then difficulty is bigger by (per hour 80～250t) in the electric furnace continuous charging that requires to realize at short notice big flow steel scrap.To common CONSTEEL system, make the material feeding slotted disk owing to adopt magnetic disc suspending operation and level trough, though its reliability height, but the each hoisting power of the operation that is subject to magnetic disc suspending (2～6t) and material feeding section width dimensions, its blow tank section must be done very longly, and (30～60m) to satisfy the co-operate of two above magnetic disc suspendings on the blow tank section, and this can take very big place, workshop.In addition, the operating rate of magnetic disc suspending also is very high, otherwise can't satisfy the steel scrap conveying capacity of electric furnace production requirement.The present invention adopts the microscler distributing trough of jumbo drop-bottom to solve this problem well, the present invention realizes by the following method: near the steel scrap stock ground electric furnace-steel scrap preheating pipeline, prepare some (5～16) drop-bottom elongated slot in a certain order, magnetic disc suspending or the miscellaneous equipment microscler distributing trough of drop-bottom of fast steel scrap being packed into is got material ready, crane is lifted on the microscler distributing trough of drop-bottom the top of delivery chute storage end, steel scrap is arranged along the throughput direction strip in delivery chute material feeding section, delivery chute adds electric furnace with steel scrap, and crane returns to be put back to original position with the microscler distributing trough of drop-bottom and continue to get the raw materials ready and hang a charged groove.The microscler cloth flute length of drop-bottom is 5～12m, the long hopper capacity of desirable drop-bottom 8～25t, the microscler distributing trough length of drop-bottom and capacity need capacity, steel scrap preheating time, the speed of service of steel scrap in delivery chute, factors such as the quantity decision of the microscler distributing trough of drop-bottom according to electric furnace, the microscler distributing trough of drop-bottom bottom has the door that a fan is opened along its length at least downwards on the structure, by mechanism with the downward release of steel scrap and formation and the microscler distributing trough of drop-bottom strip in the same way.Magnetic disc suspending is directly reinforced relatively, the feeding quantity of each crane operation can be multiplied, reduced the operating rate of crane, the more important thing is the length of the material feeding section of the delivery chute that has reduced vibration, this carries skewed slot of the present invention significance, make whole device adopt skewed slot to carry by may becoming on the engineering of theory and can implement on the one hand, and simple and reliable.This method makes the length controlled of groove in material feeding zone built in 8～12m, has only the 1/4～1/3 long of CONSTEEL material feeding section, and the mechanical efficiency height of carrying, and the adaptability in the work is strong; Reduced greatly on the other hand the material feeding section and carry and be subjected to steel scrap weight, the requirement of the vibration force that has reduced; Can carry out the ratio optimization of off-line in addition to the ratio of various steel scraps.It is to be noted the mode of the steel scrap preheating that delivery chute among the present invention was bled the end of in conjunction with, its groove depth is than CONSTEEL dark (favourable and heat exchange), and this adopts the microscler scrap box of drop-bottom to the present invention is very favorable.This method also can be used for the material loading improvement (as the patent document to CONSTEEL and Chinese application number 200620082237.X) that the horizontal conveying groove preheating is carried, and to improve the charging reliability, shortens the material feeding segment length.The long hopper of drop-bottom structurally also can make microscler material basket, its major function is lineization, rectangular distribution and the fast hoisting discharging of steel scrap in delivery chute that the big capacity of realization, steel scrap are joined optimization, steel scrap operation, " container " transportation in the similar shipping of its idea realizes efficiently, optimizes and material loading and conveying flexibly the pre-hot line of steel scrap.
From environmental angle, set up the smoke combustion chamber after can smoking gas the end of to eliminate the pernicious gas that produces after the steel scrap preheating, the smoke combustion chamber should be placed on before the steam afterheat recovery device.Also can increase some nozzle oxygen supplys on smoke guiding cover, the carbon monoxide in the combustion product gases is to improve the steel scrap pre-heat effect.
The present invention compares with present similar steel scrap preheating technology technically bigger advantage.Compare with level two groove side draught flue gas delivery chutes, this device utilize the inclined-plane carry and Turbogrid plates make flue gas gas permeability better, do not get stuck good effect of heat exchange; And maintenance and making are simpler, and steel scrap is little to the bottom land wearing and tearing of tilting, long service life.Compare with consteel horizontal vibration conveying technology, then add thermal effect at steel scrap, electric furnace steel making energy saving of system, equipment attrition, vibratory drive equipment are simple, and device length weak point, dynamic seal (packing) effect etc. have a clear superiority in.This old factory to electric furnace transforms very big advantage.
It is pointed out that on this skewed slot scheme basis delivery chute adopts two sideshakes to bleed also can obtain approaching heat exchange effect, promptly the two side of delivery chute is double-deck, and madial wall separates formation smoking mouth with bottom land.
The present invention and consteel system have different charging methods and device, different heat transfer mechanism and method, different conveying principle and device, compare with it, the equipment total length be its 2/3～1/2, and vibration equipment is little, the mass transport amount is big, the little maintenance of the wearing and tearing of equipment reduces, and advantage such as power of motor consumption reduction in material conveying process, use of the present invention can make the steel scrap pre-heat effect of electric furnace significantly improve (with the CONSTEEL ratio) and the unobstructed no jam of steel scrap course of conveying, system reliability height.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is along the profile of K1-K1 among Fig. 1;
Fig. 3 is along the profile of K2-K2 among Fig. 1;
Fig. 4 is the enlarged drawing of M part among Fig. 1;
Fig. 5 is the schematic diagram that the profile of K2-K2 adopts another structure among Fig. 1;
Fig. 6 is steel scrap of the present invention and flue gas process schematic flow sheet.
Among the figure, part 1 is for skewed slot is carried in the steel scrap preheating, wherein part 1a is that bottom land smoking mouth, part 1b are that end exhaust tube, part 1c are that Turbogrid plates, part 1d are flexible seal device, part 1e is crack, end smoking mouth, part 2 is a smoke guiding cover, part 2a for regulate mouth, part 2b be dynamic sealing device, part 2c be spout, 2d to be adjustable plate, part 3 be fixing exhaust tube, part 4a, part 4b, part 4c are horizontal exciting force device.
A is that electric furnace or other smelting equipment, B are that flue gas, the B2 that flue gas, B1 take out on being is that flue gas, the B3 that takes out at the end is that steel scrap layer, D are that charging apparatus, E are that flue, F are that smoke combustion and expansion chamber, G are that low-temperature flue gas waste heat boiler, H are that dust pelletizing system, K are that smoke regulating valve, P1 are Smoke Sensor and differential pressure pickup for leaking the cold wind, the C that enter.
The specific embodiment
The invention will be further described below in conjunction with drawings and the specific embodiments:
Fig. 2 has showed the cutaway view of accepting steel scrap C of the microscler distributing trough D of drop-bottom of double swing doors in the material feeding section of delivery chute 1, and delivery chute 1 section is a spill.
Fig. 3 has showed bottom land smoking mouthful 1a, a Turbogrid plates 1c, end exhaust tube 1b, fixedly the installation of exhaust tube 3 concerns, is to increase rate of air sucked in required B2, and quantity and the shape of end exhaust tube 1b can be revised as required;
As shown in Figure 4, Turbogrid plates 1c will interlock, and double walled floor is strengthened and transition connects, the mouth 1a that smokes at the bottom of the protective trough, and the steel scrap layer is smoked at bottom land, and mouthful 1a is anterior to be maked somebody a mere figurehead, and increases the ventilative area of steel scrap layer C.
Embodiment 2: different with embodiment 1 is the structure of delivery chute, and as shown in Figure 5, the delivery chute 1 of inclination adopts the air-breathing embodiment in both sides, and the two side be a bilayer, and madial wall separates the smoking mouth 1a that constitutes skew back with bottom land.
It may be noted that, the associated part that above-mentioned delivery chute 1, smoke guiding cover 2 etc. contact with the flue gas B of high temperature can make water-cooling structure with high temperature resistant, and partial component also can be coated with heat insulation anti-material to improve component life, reduce to discharge the temperature loss of flue gas, and improve the thermal efficiency of follow-up system.
The condition of work that this device is provided with some sensors cooperation production processes and improvement equipment also is necessary, the dedusting bleeding point can be set outside adjustable plate 2d and Smoke Sensor P1 is set, let out in the leakage of detection flue gas and the air, in adjustable plate 2d both sides pressure differential detection is set, the aperture of control and regulation plate 2d is by the aperture of model control and regulation valve K.
The multilayer curtain shape sealing that adjustable plate 2d changes non-paleocinetic flexibility into also is fine.
At delivery chute 1 outside low temperature position some acceleration transducers and displacement transducer are set, provide, seek best vibration parameters, reduce equipment attrition the conveying of steel scrap C and following the tracks of and controlling of delivery chute 1 vibration operating mode.
On device, temperature sensor is set, the cooling water temperature monitoring to steel scrap C pre-heat effect, delivery chute 1 etc. is provided.
Fig. 6 has showed the typical subsequent treatment operation of this scrap preheater, the major part B2 of flue gas B among the electric furnace A penetrates ladder skewed slot bottom and enters smoke combustion and expansion chamber F (also burner can be set on flue E) by flue E, flue gas B smoke combustion and expansion chamber F (can with burner) burn and the sedimentation flue gas in big grit, the flue gas B that extracts out enters low-temperature flue gas waste heat boiler G, waste heat in the flue gas is used to produce steam, and last flue gas B is extracted out by blower fan after by the H of ventilation and dust removal system dedusting and enters in the atmosphere.
Electric furnace use these apparatus and method carry out steel scrap reinforced after, what its technological operation can be adopted traditional C ONSTEEL stays the steel operation, and can merge electric furnace in recent years and convert the operating procedure of partial molten iron and produce.
To sum up, the exchanged heat efficient of the flue gas of this invention and steel scrap is far above having only the surface heated consteel of steel scrap system, and Mechanical Driven power is little, and equipment attrition is little, the steel scrap conveying capacity is big, is the energy-conserving and environment-protective new technology that has promotional value on smelting processes such as electric furnace.
The above; only be embodiments of the invention; be not to any pro forma restriction of the present invention; any those skilled in the art; in the scope that does not break away from technical solution of the present invention; when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations; in every case be not break away from the technical solution of the present invention content; to any simple modification, equivalent variations and modification that above embodiment did, all still belong to the scope of technical solution of the present invention protection according to the technology of the present invention essence.
Claims (10)
1. device for preheating and conveying scrap steel, comprise the delivery chute (1) that is obliquely installed with horizontal plane, described delivery chute (1) is provided with smoke guiding cover (2), described delivery chute (1) low side is stretched in the electric furnace (A) by the side-wall hole of electric furnace (A), it is characterized in that: the other end top of described delivery chute (1) is provided with the microscler distributing trough of drop-bottom (D), the microscler distributing trough of drop-bottom (D) is placed in the top of delivery chute (1) material feeding section by handling equipment (Q), the microscler distributing trough of drop-bottom (D) is longitudinally within the downward projection of delivery chute (1) material feeding section, the elongated bottom land that is vertically placed in delivery chute (1) material feeding section of steel scrap (C), delivery chute (1) imports electric furnace (A) with steel scrap (C).
2. device for preheating and conveying scrap steel as claimed in claim 1 is characterized in that: the microscler distributing trough of described drop-bottom (D) bottom is equipped with door or the finger shape carriage of opening along its length downwards.
3. device for preheating and conveying scrap steel as claimed in claim 2 is characterized in that: be provided with dynamic sealing device (2b) between described delivery chute (1) and the smoke guiding cover (2).
4. device for preheating and conveying scrap steel as claimed in claim 3, it is characterized in that: described delivery chute (1) bottom land is a ladder superposing type structure, adjacent two layers handing-over slit is that bottom land is smoked mouthful (1a), and bottom land smoking mouthful (1a) is tilted down, and there are Turbogrid plates (1c) front portion.
5. device for preheating and conveying scrap steel as claimed in claim 4 is characterized in that: the afterbody of described smoke guiding cover (2) is provided with adjustable plate (2d), and adjustable plate (2d) carries skewed slot (1) bottom land to constitute adjustable steel scrap inlet with the steel scrap preheating.
6. device for preheating and conveying scrap steel as claimed in claim 5, it is characterized in that: the adjusting mouth (2a) of smoke guiding cover (2) afterbody links to each other with expansion chamber (F) with smoke combustion by the pipeline that has control valve (K), regulates mouth (2a) and constitutes the movable sealing that adjustable steel scrap enters the mouth with control valve (K).
7. device for preheating and conveying scrap steel as claimed in claim 6 is characterized in that: delivery chute (1) below is provided with horizontal exciting force device.
8. device for preheating and conveying scrap steel as claimed in claim 7 is characterized in that: described horizontal exciting force device is a twin shaft excitation structure in distress altogether.
9. device for preheating and conveying scrap steel as claimed in claim 1 is characterized in that: the two side of described delivery chute (1) is for double-deck, and madial wall separates formation smoking mouthful (1a) with bottom land.
10. as the arbitrary described device for preheating and conveying scrap steel of claim 1 to 9, it is characterized in that: described delivery chute (1) section is a spill.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010170509A CN101825396A (en) | 2010-05-12 | 2010-05-12 | Device for preheating and conveying scrap steel |
| CN2010102705352A CN101907401B (en) | 2010-05-12 | 2010-09-02 | Scrap steel pre-heating conveyor with short process |
| CN2010205147048U CN201764828U (en) | 2010-05-12 | 2010-09-02 | short-flow conveying apparatus for preheating scrap steel |
| PCT/CN2010/079293 WO2011091685A1 (en) | 2010-02-01 | 2010-11-30 | Preheating and conveying equipment for steel scrap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010170509A CN101825396A (en) | 2010-05-12 | 2010-05-12 | Device for preheating and conveying scrap steel |
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| Publication Number | Publication Date |
|---|---|
| CN101825396A true CN101825396A (en) | 2010-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010170509A Pending CN101825396A (en) | 2010-02-01 | 2010-05-12 | Device for preheating and conveying scrap steel |
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| CN (1) | CN101825396A (en) |
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| WO2011091685A1 (en) * | 2010-02-01 | 2011-08-04 | 中冶赛迪工程技术股份有限公司 | Preheating and conveying equipment for steel scrap |
| CN102183150A (en) * | 2011-04-25 | 2011-09-14 | 中冶赛迪工程技术股份有限公司 | Quick feeding device for feeding waste steel into electric furnace and feeding method thereof |
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| CN102003876B (en) * | 2010-11-16 | 2012-12-05 | 中冶赛迪工程技术股份有限公司 | Culvert raw material delivery and smoke dust recovery device |
| CN102003876A (en) * | 2010-11-16 | 2011-04-06 | 中冶赛迪工程技术股份有限公司 | Culvert raw material delivery and smoke dust recovery device and method for smelting container |
| CN102183150A (en) * | 2011-04-25 | 2011-09-14 | 中冶赛迪工程技术股份有限公司 | Quick feeding device for feeding waste steel into electric furnace and feeding method thereof |
| WO2012145967A1 (en) * | 2011-04-25 | 2012-11-01 | 中冶赛迪工程技术股份有限公司 | Rapid feeding device and method for feeding scrap steel into electrical furnace |
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Open date: 20100908 |