CN206469680U - One kind exempts from drying direct-reduction rotary hearth furnace - Google Patents

Abstract

Exempt from drying direct-reduction rotary hearth furnace the utility model discloses one kind, cloth is carried out using the chute feeder being arranged on cooling zone and cloth area, and by setting passage on inclination, segment design and chute, quick cooling metallized pellet, the cloth time of green-ball is extended, makes full use of the heat of rotary hearth furnace cooling zone metallized pellet that green-ball is further dried so that the moisture reduction of green-ball, the explosion of pelletizing is avoided, while the effect of preheated pellets can also be reached.Drying direct-reduction rotary hearth furnace is exempted from using the utility model, green pellets need not individually pass through drying device and the furnace roof in rotary hearth furnace cooling zone need not design water-cooling wall, i.e. achievable green-ball is directly distributed into rotary hearth furnace and is reduced directly, thermal state metal pellet is cooled down simultaneously and its heat is comprehensively utilized, improve the efficiency of utilization of rotary hearth furnace, equipment investment and floor space are reduced, production cost is reduce further.

Description

One kind exempts from drying direct-reduction rotary hearth furnace

Technical field

The utility model is related to a kind of rotary hearth furnace, more particularly to one kind exempts from drying direct-reduction rotary hearth furnace, belongs to rotary hearth furnace Apparatus field.

Background technology

Pelletizing or pressure ball-drying-direct-reduction flow being used rotary hearth furnace direct-reduction technique, pelletizing or pressure ball pelletizing are needed more Rotary hearth furnace can be just distributed into after drying, therefore drying plant must be separately provided and is dried；In addition, be reduced directly through rotary hearth furnace Metallized pellet, also needs to discharge outside rotary hearth furnace after supercooling, and the water-cooling wall by being arranged on rotary hearth furnace cooling section Cooled down, this also result in the waste of metallized pellet heat.

Publication No. CN1235268A Chinese utility model patent has opened a kind of for rotary table, especially turns bottom The charging of stove and distribution device；The device includes material feed mechanism (2,3), and material transfer mechanism (304) and material gravity incline Guide groove (4)；The said equipment includes the staticizer of the distribution material for difference, and the mechanism includes toppling over guide groove (4) Cloth leading edge (214), it has profile of substantially curve, and the derivative of the curve is rotary table (10) in workbench The incremental linear function of the radius of part between center and its edge.Topple over guide groove (4) approximately radial with respect to panoramic table (10) Ground is set, and is arranged on one and is nearly parallel in the plane of the plane of the rotary table (10), and with a hopper (5) act together, the outlet edge (205) of the hopper is set close to the surface of workbench, and with toppling over guide groove (4) The substantially similar curved profile of cloth leading edge (214).Guide groove (4) is toppled over by being fixed on the base portion (204) of the guide groove (4) Multiple next doors (114) are separated into multiple passages (104), and guide groove (5) separates multiple passages (105), passage by multiple next doors (115) With the section as the material mouth of the passage (104) of guide groove (4).Feed equipment (103) includes that for manipulation guide groove will be toppled over (4) be separated into the mechanism in the next door (114) of passage (104), the next door can relatively described guide groove (4) base portion (204) it is mobile.Meanwhile, feeding adjusting device includes dynamic mechanism (103), for toppling over the whole cross section of guide groove (4) Differential type feed is carried out, the device is arranged between guide groove (4) and feed arrangement (2,3).Dynamic difference feeding device includes Multiple gates (113), these gates have appropriate separate operation device (123) and are configured to controllable by leading The entrance for each passage (104) that groove is separated into.These gates are all arranged on a top for toppling over guide groove (4) and formed Chute (203) in.Apparatus above is arranged on a support frame (1) by suitable hitch (101), the device institute The major defect of presence is as follows：

(1) have the disadvantage not handling not for the charging of rotary table, especially rotary hearth furnace and one of distribution device The wet bulb group of drying so that wet bulb group directly enters after stove, produces explosion due to being contacted with high temperature furnace bottom, causes dust to increase pollution Environment；

(2) can not be directly using so that heat recovery technique growth, heat loss as the heat entrained by flue gas in rotary hearth furnace Increase, heat recovery efficiency declines；

(3) stoving process adds the scale of technique in pelletizing so that efficiency increases, loss increase.4th has the disadvantage It is single in the way of vibrations as entering to be fed power, require larger for shaking the vibration frequency of equipment.

The Chinese utility model patent of Application No. 201510648755.7 discloses a kind of rotary table and is related to one The cooling being used in the rotary hearth furnace method synchronous with drying is planted, is comprised the following steps that：First, the red ball of rotary hearth furnace is led by first Hopper equably falls on feed end A2 lower floor's carrier bar, while the rotary hearth furnace green-ball is equably fallen by the first distributing device On the feed end B1 upper strata carrier bar；Secondly, by the rotating speed for adjusting the upper strata carrier bar and lower floor's carrier bar, it is ensured that the two Rotation direction is opposite；Then, the red ball that cold air rises and is placed through on lower floor's carrier bar, cools, together to the red ball When air temperature increase transitions into preheated air；Then, the preheated air continues to rise, and is then passed through the life on the upper strata carrier bar Ball, is dried to the green-ball, preheating, while the preheated air temperature declines, is transformed into the hot-air containing certain heat；Most Afterwards, the hot-air is extracted, into falling dust room, then enters the dirt pocket by the falling dust room, and rotary hearth furnace is transferred to by the dirt pocket In air preheating system in use, the major defect present in the system is as follows：

(1) the red ball of rotary hearth furnace could carry out cooling treatment after must being discharged through the first deflector chute outside rotary hearth furnace, not only in row Go out process and cause thermal losses, also need to be separately provided cooling device and cooled down, therefore also need extra land occupation；

(2) cooled down using cold air, easily cause the oxidation of the red ball of rotary hearth furnace, so as to be unfavorable for improving iron product Grade, reduces product quality；

(3) preheated air that the red ball of cooling rotary hearth furnace is produced, continues directly to carry out the green-ball on the carrier bar of upper strata after rising Drying, preheating, because preheated air temperature is higher, easily cause the explosion of green-ball, so as to be unfavorable for the progress of sequential reduction reaction.

The Chinese utility model patent of Application No. 201510649237.7 discloses a kind of for cooling, baking in rotary hearth furnace Synchronous high-performance device is done, it includes：Bearing block, clutch shaft bearing, second bearing, upper network chain/carrier bar, lower network chain/carrier bar, exhausting Machine, casing, upper dividing wall, middle dividing wall, lower dividing wall, maintenance door, bellows, striker plate, support frame, reductor and driving electricity Machine；The two ends of the upper link plate are respectively mounted and connect the clutch shaft bearing, and the lower carrier bar is respectively mounted and connects the second bearing, and And the clutch shaft bearing and second bearing is in overlying relation is fixedly arranged on the bearing block；The casing is placed on the support frame On, the maintenance door is opened up on the casing, and the maintenance door is placed on the support frame, the bellows are located on the casing, and this is taken out Blower fan is located above the bellows；In the casing internal, dividing wall is located on the upper link plate on this；Dividing wall is located on this in this Between network chain/carrier bar and the lower carrier bar；The lower dividing wall is located at the lower section of the lower carrier bar.

In a word, in current rotary hearth furnace process, different set is respectively adopted in the drying of green-ball and the cooling of metallized pellet Standby and technique is handled, and takes up an area face greatly, technological process is long, and efficiency of utilization is low, this not only construction cost increase, can also be caused The problems such as energy consumption index is higher, production cost is higher, has much room for improvement.

Utility model content

The utility model is mainly solving the technical problems that existing rotary hearth furnace flow, and green-ball must could cloth after individually drying Enter rotary hearth furnace and carry out needing to set on reduction roasting and rotary hearth furnace cooling zone technological process length caused by water-cooling wall, equipment investment Greatly, floor space is big and metallized pellet heat can not be utilized, and thermal loss is big, the problems such as high energy consumption；

Technical problem to be solved in the utility model is achieved through the following technical solutions：

One kind exempts from drying direct-reduction rotary hearth furnace, including annular body of heater and rotatable ring-shaped furnace bottom, the annular body of heater by Inner circumferential furnace wall, periphery furnace wall and annular furnace roof composition, inner circumferential furnace wall are coaxially disposed with periphery furnace wall, the inside and outside side of annular furnace roof The top of inner circumferential furnace wall and periphery furnace wall is connected to, annular furnace is formed, described ring-shaped furnace bottom is correspondingly arranged at the annular The lower section of burner hearth；Cloth area, preheating zone, middle warm area, high-temperature region and cooling zone are circumferentially disposed with the annular furnace, And cooling zone and cloth area are adjacent, separated between cloth area and preheating zone, between high-temperature region and cooling zone with the barricade of radial direction, Left between the lower end of the barricade and ring-shaped furnace bottom can at least through one layer of material interval；The preheating zone, middle warm area and Burner is housed on the internal and external circumferential furnace wall of high-temperature region, spiral discharging device is provided between the furnace bottom in cooling zone and cloth area；In the cloth Expect that the furnace bottom between area and cooling zone is provided with channel distributor and channel distributor cross section two ends are located between partition wall；At this The side that furnace roof above channel distributor corresponds to cooling zone is provided with material inlet.

The channel distributor is slipped including first paragraph gravity chute, second segment gravity chute and the 3rd section of tilting Groove, three sections of gravity chute head and the tail are sequentially connected and alternateed in circumferencial direction and staggered, and three sections of gravity chutes pass through two Fixed-link device is connected and fixed to together, and the upper end of fixed-link device is connected with the vibra feeder positioned at furnace roof；Make For preferred structure, one of vibra feeder is located near material inlet；Three sections of gravity chutes are in sector, and it two The radian at end is consistent with the radian on rotary hearth furnace circumferencial direction, and its cross section is parallel with rotary hearth furnace radial direction；First paragraph is tilted Formula chute, second segment gravity chute and each two dividing plates of freedom of the 3rd section of gravity chute and the chute being trapped among in dividing plate Runway is constituted；Discharge flapper is respectively equipped with the head end of the head end of second segment gravity chute and the 3rd section of gravity chute, Thus it can ensure that pelletizing is entirely fallen on next layer of chute；The head end of first paragraph gravity chute chute runway is located at material inlet Underface；It is preferred that, width of the material inlet along rotary hearth furnace radial direction is identical with the width of the chute runway of first paragraph gravity chute.

The utility model is to a kind of preferred structure of channel distributor, and the angle of first paragraph gravity chute and level is 5~10 °, the angle of second segment gravity chute and level is 8~13 °, and the angle of the 3rd section of gravity chute and level is 10 ~15 °；The center of three sections of gravity chutes is on spiral discharging device, and the tail end of the 3rd section of gravity chute is located at cloth area Surface, and the perigee distance rotary furnace bottom of the 3rd section of gravity chute tail end is highly 40~80mm.Thus, it can be ensured that Channel distributor can pelletizing is uniform, smoothly cloth is to rotary furnace bottom, and farthest reduces pelletizing in falling process In fragmentation phenomenon.

The height of the dividing plate is 80~100mm, while its height is higher by least 40mm than the bed of material；The chute runway Stomata is distributed with bottom even；It is preferred that, the stomata is circular stomata, it is furthermore preferred that the circular stomata be a diameter of 5~ 7mm circular stomata.Thus, qualified pelletizing can be uniformly on cloth to channel distributor, and can ensure that heat is smoothly transported upwards It is dynamic.

The utility model to channel distributor further preferably, the channel distributor is in circumferencial direction away from turning bottom The distance of stove both sides furnace wall is 50~100mm.

It is of the present utility model exempt from drying direct-reduction rotary hearth furnace processing green pellets operation principle be：By in vibrating feed The batcher set on device, outside rotary hearth furnace is fed, and is slowly moved down via chute, is reached chute end and is kept off by blanking Plate is given to chute, then after slowly being moved down via chute, reaches chute end by discharge flapper to chute, finally via Chute even feeding to the cloth area of rotary furnace bottom completes cloth.Green pellets is after preliminary preheating and drying, then is distributed into and turns The feed zone of bottom stove, then sequentially pass through preheating zone, middle warm area, high-temperature region and cooling zone, green pellets in Direct Reduction not Can occur substantially to burst and complete direct reduction reactor, then through discharging outside spiral discharge rotary hearth furnace, the metallization after being cooled down Pelletizing.

The utility model carries out cloth using the chute feeder being arranged on cooling zone and cloth area, and by inclining Tiltedly, segment design and passage is set on chute, quickly cools down metallized pellet, extend the cloth time of green-ball, fill Divide the heat using rotary hearth furnace cooling zone metallized pellet, green-ball is further dried so that the moisture reduction of green-ball, it is to avoid pelletizing Explosion, while the effect of preheated pellets can also be reached.Using the utility model exempt from drying direct-reduction rotary hearth furnace, green pellets without Furnace roof that need to be individually by drying device and in rotary hearth furnace cooling zone need not design water-cooling wall, you can realize that green-ball is directly distributed into and turn Bottom stove is reduced directly, while thermal state metal pellet is cooled down and its heat is comprehensively utilized, improves rotary hearth furnace Efficiency of utilization, reduce equipment investment and floor space, reduce further production cost.

Major advantage of the present utility model includes：

1) problem that green-ball directly enters stove is solved, the technological process of rotary hearth furnace is shortened, equipment investment is reduced and accounts for Ground area, improves production efficiency, reduces production cost；

2) heat of rotary hearth furnace cooling zone metallized pellet is made full use of, the purpose of drying and preheated pellets is reached, enters one Step improves rotary hearth furnace efficiency of utilization, reduces energy consumption；

3) the utility model can be prevented effectively from green-ball in drying and the Decrepitation Phenomena of roasting process, so as to ultimately facilitate also The progress of former calcination.

Brief description of the drawings

One kind that Fig. 1 the utility model is provided exempts from drying direct-reduction rotary hearth furnace inside top figure；

Fig. 2 the utility model exempts from the chute structure top view of drying direct-reduction rotary hearth furnace；

Fig. 3 chute cross-sectional profile schematic diagrames；

Fig. 4 channel distributors are in rotary hearth furnace circumferencial direction structural representation；

1st, cloth area；2nd, preheating zone；3rd, middle warm area；4th, high-temperature region；5th, cooling zone；6th, dividing plate；7th, chute runway；8th, gas Hole, 9, discharge flapper；10th, spiral discharging device；11st, chute 1；12nd, chute 2；13rd, chute 3；14th, vibra feeder；15th, it is fixed Linked set；16th, material inlet；17th, barricade.

Embodiment

With reference to Fig. 1, the utility model exempts from drying direct-reduction rotary hearth furnace there is provided one kind, including annular body of heater and rotatable Ring-shaped furnace bottom, the annular body of heater is made up of inner circumferential furnace wall, periphery furnace wall and annular furnace roof, and inner circumferential furnace wall and periphery furnace wall are coaxial Set, the inside and outside side of annular furnace roof is connected to the top of inner circumferential furnace wall and periphery furnace wall, form annular furnace, it is described Ring-shaped furnace bottom is correspondingly arranged at the lower section of the annular furnace；Cloth area 1, preheating zone are circumferentially disposed with the annular furnace 2nd, middle warm area 3, high-temperature region 4 and cooling zone 5, and cooling zone 5 and cloth area 1 are adjacent, between cloth area 1 and preheating zone 2, high-temperature region Separated between 4 and cooling zone 5 with the barricade 17 of radial direction, leave and can at least lead between the lower end of the barricade 17 and ring-shaped furnace bottom Cross the interval of one layer of material；Burner is housed on the internal and external circumferential furnace wall of the preheating zone 2, middle warm area 3 and high-temperature region 4, in cooling zone Spiral discharging device 10 is provided between 5 and the furnace bottom in cloth area 1；Wherein, set on the furnace bottom between the cloth area 1 and cooling zone 5 There is channel distributor, and channel distributor cross section two ends are located between partition wall 17a, 17b；Stove above the channel distributor Top is provided with material inlet 16 corresponding to the side of cooling zone 5.

The channel distributor is 50~100mm in distance of the circumferencial direction away from rotary hearth furnace both sides furnace wall.

With reference to Fig. 2-Fig. 3, the channel distributor includes first paragraph gravity chute 11, the and of second segment gravity chute 12 3rd section of gravity chute 13, three sections of head and the tail of gravity chute 11,12,13 are sequentially connected and alternate mistake in circumferencial direction Open, three sections of gravity chutes 11,12,13 are connected and fixed to together by two fixed-link devices 15, fixed-link device 15 upper end is connected with the vibra feeder 14 positioned at furnace roof；It is preferred that, one of vibra feeder 14 is located at material inlet 16 Near；Three sections of gravity chutes 11,12,13 are in sector, and the radian at its two ends is consistent with the radian on rotary hearth furnace circumferencial direction, Its cross section is parallel with rotary hearth furnace radial direction；First paragraph gravity chute 11, second segment gravity chute 12 and the 3rd section Two dividing plates 6 of each freedom of gravity chute 13 and the chute runway 7 being trapped among in dividing plate are constituted；In second segment gravity chute 12 Head end and the head end of the 3rd section of gravity chute 13 be respectively equipped with discharge flapper 9a, 9b；First paragraph gravity chute 11 is slipped The head end of groove runway 7 is located at the underface of material inlet 16；As preferred structure, width of the material inlet 16 along rotary hearth furnace radial direction with The width of the chute runway 7 of first paragraph gravity chute 11 is identical；First paragraph gravity chute 11 and the angle of level be 5~ 10 °, the angle of second segment gravity chute 12 and level is 8~13 °, and the angle of the 3rd section of gravity chute 13 and level is

10~15 °；The center of three sections of gravity chutes 11,12,13 is on spiral discharging device 10, and the 3rd section of tilting is slipped The tail end of groove 13 is located at the surface in cloth area 1, and the perigee distance rotary furnace bottom of the 3rd section of tail end of gravity chute 13 Highly it is 40~80mm.

The height of the dividing plate 6 is 80~100mm, while its height is higher by least 40mm than the bed of material；The chute runway 7 Bottom even stomata 8 is distributed with；As a kind of preferred structure, the stomata 8 is circular stomata, it is furthermore preferred that described Circular stomata is a diameter of 5~7mm circular stomata.

The operation principle that the utility model exempts from drying direct-reduction rotary hearth furnace is as follows：Green pellets passes through in vibra feeder 14 The batcher set outside upper, rotary hearth furnace is fed, and is slowly moved down via chute 11, is reached chute end and is kept off by blanking Plate 9a is given to chute 12, then after slowly being moved down via chute 12, reaches chute end by discharge flapper 9b to chute 13, finally complete cloth via the cloth area 1 of the even feeding of chute 13 to rotary furnace bottom.Green pellets is by preliminary preheating and does After dry, then the feed zone 1 of rotary hearth furnace is distributed into, then sequentially passes through preheating zone 2, middle warm area 3, high-temperature region 4 and cooling zone 5, pelletizing exists Will not occur substantially to burst and complete direct reduction reactor in Direct Reduction, then through discharging outside the discharge rotary hearth furnace of spiral 10, Metallized pellet after being cooled down.Thus, green pellets is without individually by drying device, and in the furnace roof of rotary hearth furnace cooling zone Water-cooling wall need not be designed, you can realize that green-ball is directly distributed into rotary hearth furnace and is reduced directly, while thermal state metal pellet is obtained Cool down and its heat is comprehensively utilized, improve the efficiency of utilization of rotary hearth furnace, reduce equipment investment and floor space, enter One step reduces production cost.

Case is embodied

Embodiment 1

With reference to Fig. 1-4, one kind provided by the utility model is exempted from drying direct-reduction rotary hearth furnace and used in rotary hearth furnace The rotary hearth furnace of chute feeder, furnace roof, the side of vibra feeder 14 in the top of rotary hearth furnace cooling zone 5 are provided with material inlet 16, give Width of the material mouth 16 along rotary hearth furnace radial direction is identical with the width of chute 11；Barricade is provided with the cross section two ends of chute 11,12,13 17a, 17b；Burner is provided with the rotary hearth furnace both sides furnace wall of rotary hearth furnace preheating zone 2, middle warm area 3 and high-temperature region 4, for various fuel Burning, to provide heat for rotary hearth furnace reduction process.

Wherein, channel distributor is arranged on the cooling zone 5 and cloth area 1 in rotary hearth furnace, including three sections have with horizontal plane The gravity chute 11,12,13 of certain angle, and joined end to end between three sections of chutes, and consolidated by fixed-link device 15 It is fixed, vibrating feed is carried out by vibra feeder 14.

Wherein, chute 11 and horizontal sextant angle are 5 °, and chute 12 and horizontal sextant angle are 8 °, and chute 13 and horizontal sextant angle are 10 °, And the center of chute 13 is on spiral discharging device 10, the least significant end of chute 13 apart from rotary furnace bottom highly be 40mm, chute center Directly over discharging spiral 10, and with its keeping parallelism.

Wherein, channel distributor is in circumferencial direction and rotary hearth furnace side wall 50~100mm, and chute is interior by twice dividing plate apart 6 are averagely divided into three chute runways 7, and chute is consistent with the radian on rotary hearth furnace circumferencial direction, chute cross section is with turning bottom Stove radial direction is parallel；The height of the chute internal partition 6 is 80~100mm, while its height is higher by 40mm than bed depth； The bottom even of chute, which is distributed with below a diameter of 5mm circular stomata 8, each chute, a baffle plate 9, and three chutes Vibra feeder 14 is provided with rotary hearth furnace junction so that pelletizing even feeding, avoid putty.

Green pellets is fed by the material inlet 16 set in rotary hearth furnace furnace roof, is slowly moved down via chute 11, Reach chute end logical to chute end is reached to chute 12, then after slowly being moved down via chute 12 by discharge flapper 9a Discharge flapper 9b is crossed to chute 13, finally cloth is completed via the cloth area 1 of the even feeding of chute 13 to rotary furnace bottom.It is raw Pelletizing is after preliminary preheating and drying, then is distributed into the feed zone 1 of rotary hearth furnace, then sequentially passes through preheating zone 2, middle warm area 3, high temperature Area 4 and cooling zone 5, pelletizing will not occur substantially to burst and complete direct reduction reactor in Direct Reduction, then through discharging Outside the discharge rotary hearth furnace of spiral 10, the metallized pellet after being cooled down.Thus, green pellets need not individually pass through drying device, and Furnace roof in rotary hearth furnace cooling zone need not design water-cooling wall, you can realize that green-ball is directly distributed into rotary hearth furnace and is reduced directly, together When thermal state metal pellet cooled down and its heat is comprehensively utilized, improve the efficiency of utilization of rotary hearth furnace, reduce Equipment investment and floor space, further reduce production cost.

Embodiment 2

With reference to Fig. 1-4, one kind provided by the utility model is exempted from drying direct-reduction rotary hearth furnace and used in rotary hearth furnace The rotary hearth furnace of chute feeder, furnace roof, the side of vibra feeder 14 in the top of rotary hearth furnace cooling zone 5 are provided with material inlet 16, give Width of the material mouth 16 along rotary hearth furnace radial direction is identical with the width of chute 11；Barricade is provided with the cross section two ends of chute 11,12,13 17；Burner, the combustion for various fuel are provided with the rotary hearth furnace both sides furnace wall of rotary hearth furnace preheating zone 2, middle warm area 3 and high-temperature region 4 Burn, to provide heat for rotary hearth furnace reduction process.

Wherein, it is divided into chute by twice dividing plate 6 on three feeding chutes, and chute radian and rotary hearth furnace circumferencial direction Radian is consistent, chute cross section is parallel with rotary hearth furnace radial direction, three chute inner bottom parts are evenly distributed with a diameter of 6mm circular stomata 8, each chute end is provided with rotary hearth furnace junction and shaken by rectangle blanking channel, and three chutes Dynamic dispenser 14, may be such that pelletizing even feeding, avoids material spilling hole putty.

Wherein, chute 11 and horizontal sextant angle are 8 °, and chute 12 and horizontal sextant angle are 10 °, and chute 13 and horizontal sextant angle are 12 °, and the center of chute 13 is on spiral discharging device 10, the least significant end of chute 13 apart from rotary furnace bottom highly be 60mm, chute Be centrally located at directly over discharging spiral 10, and with its keeping parallelism.

Wherein, distributing device is in circumferencial direction and rotary hearth furnace side wall 50~100mm, and chute is interior flat by twice dividing plate 6 apart Three chute runways 7 are divided into, and chute radian is consistent with the radian on rotary hearth furnace circumferencial direction, chute cross section is with turning bottom Stove radial direction is parallel.The height of the chute internal partition 6 is 80~100mm, while its height should be at least higher than bed depth Go out 40mm.The bottom even of chute, which is distributed with below a diameter of 6mm circular stomata 8, each chute, a baffle plate 9, and Three chutes are provided with vibra feeder 14 with rotary hearth furnace junction, may be such that pelletizing even feeding, avoid putty.

Green pellets is fed by the material inlet 16 set in rotary hearth furnace furnace roof, is slowly moved down via chute 11, Chute end is reached by discharge flapper 9a to chute 12, then after slowly being moved down via chute 12, arrival chute end Given by discharge flapper 9b to chute 13, finally complete cloth via the cloth area 1 of the even feeding of chute 13 to rotary furnace bottom. Green pellets is after preliminary preheating and drying, then is distributed into the feed zone 1 of rotary hearth furnace, then sequentially passes through preheating zone 2, middle warm area 3, height Warm area 4 and cooling zone 5, pelletizing will not occur substantially to burst and complete direct reduction reactor in Direct Reduction, then through going out Expect outside the discharge rotary hearth furnace of spiral 10, the metallized pellet after being cooled down.

Embodiment 3

With reference to Fig. 1-4, one kind provided by the utility model is exempted from drying direct-reduction rotary hearth furnace and used in rotary hearth furnace The rotary hearth furnace of chute feeder, furnace roof, the side of vibra feeder 14 in the top of rotary hearth furnace cooling zone 5 are provided with material inlet 16, give Width of the material mouth 16 along rotary hearth furnace radial direction is identical with the width of chute 11；Barricade is provided with the cross section two ends of chute 11,12,13 17；Burner, the combustion for various fuel are provided with the rotary hearth furnace both sides furnace wall of rotary hearth furnace preheating zone 2, middle warm area 3 and high-temperature region 4 Burn, to provide heat for rotary hearth furnace reduction process.

Wherein, it is divided into chute by twice dividing plate 6 on three feeding chutes, and chute radian and rotary hearth furnace circumferencial direction Radian is consistent, chute cross section is parallel with rotary hearth furnace radial direction, three chute inner bottom parts are evenly distributed with a diameter of 7mm circular stomata 8, each chute end is provided with rotary hearth furnace junction and shaken by rectangle blanking channel, and three chutes Dynamic dispenser 14, may be such that pelletizing even feeding, avoids material spilling hole putty；

Wherein, chute 11 and horizontal sextant angle are 10 °, and chute 12 and horizontal sextant angle are 13 °, and chute 13 and horizontal sextant angle are 15 °, and the center of chute 13 is on spiral discharging device, the least significant end of chute 13 apart from rotary furnace bottom is highly 80mm, in chute The heart be located at discharging spiral directly over and with its keeping parallelism.

Wherein, distributing device is in circumferencial direction and rotary hearth furnace side wall 50~100mm, and chute is interior flat by twice dividing plate 6 apart Three chute runways 7 are divided into, and chute radian is consistent with the radian on rotary hearth furnace circumferencial direction, chute cross section is with turning bottom Stove radial direction is parallel.The height of the chute internal partition 6 is 80~100mm, while its height should be at least higher than bed depth Go out 40mm.The bottom even of chute, which is distributed with below a diameter of 7mm circular stomata 8, each chute, a baffle plate 9, and Three chutes are provided with vibra feeder 14 with rotary hearth furnace junction, may be such that pelletizing even feeding, avoid putty.

Green pellets is fed by the material inlet 16 set in rotary hearth furnace furnace roof, is slowly moved down via chute 11, Chute end is reached by discharge flapper 9a to chute 12, then after slowly being moved down via chute 12, arrival chute end Given by discharge flapper 9b to chute 13, finally complete cloth via the cloth area 1 of the even feeding of chute 13 to rotary furnace bottom. Green pellets is after preliminary preheating and drying, then is distributed into the feed zone 1 of rotary hearth furnace, then sequentially passes through preheating zone 2, middle warm area 3, height Warm area 4 and cooling zone 5, pelletizing will not occur substantially to burst and complete direct reduction reactor in Direct Reduction, then through going out Expect outside the discharge rotary hearth furnace of spiral 10, the metallized pellet after being cooled down.

Claims (11)

1. one kind exempts from drying direct-reduction rotary hearth furnace, including annular body of heater and rotatable ring-shaped furnace bottom, the annular body of heater is by interior All furnace walls, periphery furnace wall and annular furnace roof composition, inner circumferential furnace wall are coaxially disposed with periphery furnace wall, the inside and outside side point of annular furnace roof The top of inner circumferential furnace wall and periphery furnace wall is not connected to, annular furnace is formed, and described ring-shaped furnace bottom is correspondingly arranged at the annular furnace The lower section of thorax；Cloth area (1), preheating zone (2), middle warm area (3), high-temperature region are circumferentially disposed with the annular furnace (4) and cooling zone (5), and cooling zone (5) and cloth area (1) are adjacent, between cloth area (1) and preheating zone (2), high-temperature region (4) Separated between cooling zone (5) with the barricade (17) of radial direction, being left between the lower end of the barricade (17) and ring-shaped furnace bottom can At least through the interval of one layer of material；It is equipped with the internal and external circumferential furnace wall of the preheating zone (2), middle warm area (3) and high-temperature region (4) Spiral discharging device (10) is provided with burner, the furnace bottom between cooling zone (5) and cloth area (1), it is characterised in that：In the cloth Upper between the furnace bottom of area (1) and cooling zone (5) to set channel distributor, the furnace roof above the channel distributor corresponds to cooling The side in area (5) is provided with material inlet (16)；Distance of the channel distributor away from rotary hearth furnace both sides furnace wall is 50~100mm.

2. according to claim 1 exempt from drying direct-reduction rotary hearth furnace, it is characterised in that：The channel distributor includes the One section of gravity chute (11), second segment gravity chute (12) and the 3rd section of gravity chute (13), three sections of gravity chutes (11,12,13) are sequentially connected and alternateed in circumferencial direction from beginning to end staggers, and three sections of gravity chutes (11,12,13) pass through two Individual fixed-link device (15) is connected and fixed to together, the upper end of fixed-link device (15) and the vibrating feed positioned at furnace roof Device (14) is connected.

3. exempt from drying direct-reduction rotary hearth furnace according to described in claim 2, it is characterised in that：One vibra feeder (14) position Near material inlet (16).

4. according to claim 2 exempt from drying direct-reduction rotary hearth furnace, it is characterised in that：Three sections of gravity chutes (11, 12,13) in sector, the radian at its two ends is consistent with the radian on rotary hearth furnace circumferencial direction, its cross section and rotary hearth furnace radial direction Direction is parallel.

5. according to claim 2 exempt from drying direct-reduction rotary hearth furnace, it is characterised in that：First paragraph gravity chute (11), second segment gravity chute (12) and two dividing plates (6) of each freedom of the 3rd section of gravity chute (13) and be trapped among every Chute runway (7) composition in plate；In the head end of second segment gravity chute (12) and the 3rd section of gravity chute (13) Head end is respectively equipped with discharge flapper (9a, 9b)；The head end of first paragraph gravity chute (11) chute runway (7) is located at material inlet (16) underface.

6. according to claim 2 exempt from drying direct-reduction rotary hearth furnace, it is characterised in that：Material inlet (16) is along rotary hearth furnace footpath To width it is identical with the width of the chute runway (7) of first paragraph gravity chute (11).

7. according to claim 5 exempt from drying direct-reduction rotary hearth furnace, it is characterised in that：The height of the dividing plate (6) is 80~100mm, while its height is at least higher by 40mm than bed depth；Stomata is distributed with the bottom even of chute runway (7) (8)。

8. according to claim 7 exempt from drying direct-reduction rotary hearth furnace, it is characterised in that：The stomata (8) is circular gas Hole.

9. according to claim 8 exempt from drying direct-reduction rotary hearth furnace, it is characterised in that：The circular stomata is a diameter of 5~7mm circular stomata.

10. exempt from drying direct-reduction rotary hearth furnace according to claim 2 or 5, it is characterised in that：First paragraph gravity chute (11) and the angle of level is 5~10 °, the angle of second segment gravity chute (12) and level is 8~13 °, the 3rd section of inclination Formula chute (13) and the angle of level are 10~15 °.

11. exempt from drying direct-reduction rotary hearth furnace according to claim 2 or 4, it is characterised in that：Three sections of gravity chutes The center of (11,12,13) is on spiral discharging device (10), and the tail end of the 3rd section of gravity chute (13) is located at cloth area (1) Surface, and the 3rd section of gravity chute (13) tail end perigee distance rotary furnace bottom highly be 40~80mm.