CN103194561B - Device for directly adding sintering returned dust into ladle - Google Patents
Device for directly adding sintering returned dust into ladle Download PDFInfo
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- CN103194561B CN103194561B CN201310115570.0A CN201310115570A CN103194561B CN 103194561 B CN103194561 B CN 103194561B CN 201310115570 A CN201310115570 A CN 201310115570A CN 103194561 B CN103194561 B CN 103194561B
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Abstract
The invention discloses a device for directly adding sintering returned dust into a ladle. The device comprises a ladle and an aggregation bucket. A pneumatic quadrant valve is arranged at the blanking opening of the aggregation bucket; a bucket belt is arranged below the aggregation bucket; a material inlet of the bucket belt corresponds to the blanking opening of the aggregation bucket; a blanking collecting bucket is arranged at a material outlet at an uptrend end of the bucket belt; the bottom end of a blanking pipe of the blanking collecting bucket is fixedly connected with a guide pipeline; an outlet of the guide pipeline is positioned above the ladle and corresponds to a melted iron outlet of a blast furnace; a rotating device is arranged at the upper part of the blanking pipe of the blanking collecting bucket; three or more weighing sensors are uniformly distributed at the lower edge the aggregation opening of the aggregation bucket; signal terminals of the weighing sensors are connected with control devices; and output terminals of the control devices are respectively connected with a pneumatic device, the rotating device and a control terminal for driving the bucket belt. The device directly adds granule dust into the ladle, saves the process of resintering of sintering returned dust, reduces the consumption of steel and iron material, and reduces the production cost.
Description
Technical field
The present invention relates to a kind of servicing unit in field of steel production, specifically a kind of feeding device.
Background technology
At present, steel market situation is increasingly serious, and the production cost how reducing iron and steel just becomes the target that each steel mill is pursued day by day.Steel generally all extract from iron ore, and basically, the raw material of steel is iron ore.From iron ore to steel, there is several different process routes.Most importantly " blast furnace approach ", iron ore is first smelt the pig iron in blast furnace, then is raw material with the pig iron, is differently smelt steel.Blast furnace ironmaking is the main method of modern ironmaking, is the important step during iron and steel is produced, but the breeze come from mine is because granularity is too little, gas permeability is very poor, easily cause blast furnace to be selected materials and collapse material, therefore directly can not enter blast furnace, need first sintering mineral powder to be become sintering deposit.The sintering of breeze is one of step of blast furnace ironmaking, namely before blast furnace ironmaking is produced, by the powdery iron-containing raw material be broken into by iron ore powder, allocate appropriate fuel and flux into, add appropriate water, after mixing and pelletizing, on agglomerating plant, make material generation series of physical chemical change, sinter block sintering deposit into.The compound of sintering deposit mainly iron and oxygen, granularity is comparatively large, and is loose structure, and intensity is also larger, can ensure the direct motion of blast furnace.
Blast fumance carries out continuously.During production, from furnace roof, (general furnace roof is made up of with hopper material kind, modernized blast furnace is clock valve furnace roof and bell-less BF tep) constantly load sintering deposit, coke, flux, blow into hot blast (1000 ~ 1300 degrees Celsius) from the air port of bottom house, spray into the fuel such as oil, coal or natural gas.Raw material, fuel decline along with the carrying out of the processes such as melting in stove.Under high temperature, decline at furnace charge and in coal gas uphill process, successively conduct heat, reduce, dissolve, take off charcoal effect and generate the pig iron, molten iron is released from tapping hole.Ash content in gangue in sintering deposit, coke and injection material is combined with flux such as adding the lime stone in stove and generates slag, discharges respectively from tapping hole and slag notch.Coal gas is derived from furnace roof, after dedusting, as industrial coal gas.Conditions of blast furnace stable smooth operation generally refers to that the furnace charge in stove declines and rises evenly with Gas Flow, and furnace temperature is stable abundant, and the pig iron is qualified, high yield and low cost.
But it is too little as the powder particles under sintering deposit some sieve total that the sintering plant of blast furnace raw material is made, its particle diameter only has 4 ~ 5mm or less, if this part sintering back powder is directly added blast furnace use, the hot blast of 1000 ~ 1300 degrees Celsius that then bottom house air port blows into is enough to make it to be suspended in Top of BF, can not ensure that furnace charge declines evenly, and then affect carrying out smoothly of reduction reaction in blast furnace, therefore this short grained sintering back powder can not directly use when raw material enters blast furnace, only have and again sinter it, this adds production cost undoubtedly.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of device for directly adding sintering back powder in ladle, this device can realize sintering back powder less for granularity to join in molten iron, realize fully merging with the molten iron of blast furnace process, thus save the operation sintering back powder and again sinter, reduce production cost.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
For directly adding the device of sintering back powder in ladle, comprise exporting corresponding ladle of placing with the molten iron of blast furnace and holding the taper sintering back powder and gather bucket, described in gather bucket feed opening be provided with driven by pneumatic means, for controlling to sinter the Pneumatic fan-shaped valve of back powder discharge; The below that correspondence gathers the feed opening of bucket is provided with for accepting and transmitting the ramped shaped bucket type belt sintering back powder, the charging aperture of described bucket type belt is corresponding to the feed opening gathering bucket, bucket type belt raise up end discharge outlet be provided with blanking collection bucket, the tremie pipe bottom of blanking collection bucket is fixedly connected with the guide duct guiding sintering back powder to flow to, and the outlet of described guide duct is positioned at above ladle; The top of described blanking collection bucket tremie pipe is provided with the tumbler for regulating guide duct position; Described the gather materials lower edge of mouth of bucket of gathering is evenly equipped with more than three or three for weighing the LOAD CELLS gathering the gross weight that struggles against;
The signal end of described LOAD CELLS is connected with control device, and the output of control device is respectively with pneumatic means, tumbler and drive the control end of bucket type belt to be connected.
Further improvement of the present invention is: the motor that described tumbler comprises the worm gear be fixedly connected with blanking collection bucket tremie pipe top, the worm screw be meshed with worm gear and drives worm screw to rotate, the output of the input connection control device of motor.
Further improvement of the present invention is: be provided with the gripper shoe for supporting blanking collection bucket below described blanking collection bucket tremie pipe, gripper shoe is provided with bearing holder (housing, cover), thrust ball bearing and deep groove ball bearing that blanking collection bucket is rotated is set gradually from top to bottom in bearing holder (housing, cover), also be provided with axle sleeve between thrust ball bearing and deep groove ball bearing, bearing holder (housing, cover) upper end arranges the end cap for sealing.
Further improvement of the present invention is: described pneumatic means comprises the cylinder be communicated with gas source pipe and the solenoid directional control valve be arranged on for control cylinder action on gas source pipe, the output of the control end connection control device of described solenoid directional control valve, the piston rod of cylinder is connected with the control end of Pneumatic fan-shaped valve.
Further improvement of the present invention is: described gas source pipe is also provided with the source of the gas three linked piece be made up of air reducing valve, filter, oil sprayer.
Further improvement of the present invention is: described bucket type belt bilateral symmetry is provided with the inclined vertical wheel of gear.
Further improvement of the present invention is: described in gather bucket the material level that adds be provided with guardrail.
Further improvement of the present invention is: described in gather bucket top flue dust collecting bucket is set.
Further improvement of the present invention is: described in gather bucket cross section be square, the foursquare length of side of the mouth that gathers materials is greater than the foursquare length of side of feed opening.
Owing to have employed technique scheme, the technological progress that the present invention obtains is:
The present invention is directly joined in the molten iron of blast furnace process by the sintering back powder that the granularity of being made by sintering plant is less, eliminates the operation that sintering back powder sinters again, decreases steel technology, reduce production cost.
Granule can be sintered back powder and just directly join in molten iron without again sintering by the present invention, and makes the silicon in molten iron and sintering back powder carry out abundant chemical reaction, makes the silicon in molten iron just be down to rational scope before entering converter.Molten iron is loaded converter, then smelts through oxygen blast, can greatly reduce silicone content in molten steel, avoid the high silicone content for reducing in molten steel and carry out other loaded down with trivial details operation again, create favourable operating condition to grate work, slow down splash simultaneously, be conducive to the consumption reducing molten iron.
Gather bucket and be set to taper, the material stock of its inside can be made all to be used effectively.Gather bucket material selection Q345 plate and replace common A3 plate, the service life of gathering bucket can be extended.
Gather bucket feed opening and arrange Pneumatic fan-shaped valve, Pneumatic fan-shaped valve is controlled by solenoid directional control valve, and the control end of solenoid directional control valve is controlled by control device, can realize the operated from a distance gathering the keying of bucket feed opening.The action button of solenoid directional control valve is arranged on mixed iron blast operating room, and by mixed iron blast, operative employee operates, and also saves manpower simultaneously.
Gas source pipe increases a source of the gas three linked piece be made up of air reducing valve, filter, oil sprayer, wherein, air reducing valve can carry out voltage stabilizing to source of the gas, makes source of the gas be in steady state, can reduce because of the damage to the hardware such as solenoid directional control valve and cylinder during source of the gas pressure fluctuations.It is clean that filter is used for source of the gas, can moisture content in filtering compressed air, avoids moisture content to enter solenoid directional control valve and cylinder with gas, affect the performance of solenoid directional control valve or cylinder.Oil sprayer can lubricate solenoid directional control valve and cylinder, in order to extend the service life of solenoid directional control valve and cylinder.
The bilateral symmetry of bucket type belt arranges the inclined vertical wheel of gear, can prevent bucket type belt deviation, ensures the normal safe running of bucket type belt.
The raise up discharge outlet of one end of bucket type belt arranges the blanking collection bucket and guide duct that can rotate, the outlet of guide duct is made to be positioned at above ladle, can ensure that sintering back powder can accurately be converted in molten iron, make sintering back powder can reach best thawing effect.The top of blanking collection bucket tremie pipe arranges worm and gear tumbler and deep groove ball bearing and thrust ball bearing, worm gear is driven by rotary worm, thus drive guide duct to turn to, add that worm and gear can realize being transferred to self-locking behind position, to ensure the blanking position regulating sintering back powder at any time, ensure that sintering back powder is fallen in the molten iron in ladle, ensure that sintering back powder at utmost changes slag.
The material level that adds gathering bucket arranges guardrail, can prevent forklift to when gathering filler in bucket to the collision gathering bucket, guarantee the safe handling of equipment.
Gather bucket top and set up flue dust collecting bucket, flue dust collecting bucket connects cleaning shaft, can avoid the pollution of airborne dust when adding back powder to surrounding environment and the injury of the person.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein, 1, ladle, 2, molten iron outlet, 3, guide duct, 4, thrust ball bearing, 5, deep groove ball bearing, 6, worm screw, 7, worm gear, 8, blanking collection bucket, 9, cylinder, 10, bucket type belt, 11, LOAD CELLS, 12, bucket is gathered, 13, flue dust collecting bucket, 14, cleaning shaft, 15, cylinder, 16, solenoid directional control valve, 17, source of the gas three linked piece, 18, gas source pipe, 19, Pneumatic fan-shaped valve, 20, gripper shoe, 21, bearing holder (housing, cover), 22, axle sleeve, 23, end cap.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further details:
For directly adding the device of sintering back powder in ladle, as shown in Figure 1, comprise to export with the molten iron of blast furnace 2 corresponding place ladle 1, gather bucket 12, bucket type belt 10, blanking collection bucket 8 and guide duct 3.
Wherein gather bucket 12 for holding sintering back powder, shape is taper, and gather the cross section of bucket 12 for square, the foursquare length of side of the mouth that gathers materials gathering bucket 12 is greater than the foursquare length of side of feed opening.The feed opening gathering bucket 12 is provided with Pneumatic fan-shaped valve 19, and Pneumatic fan-shaped valve 19 is driven by pneumatic means, for controlling the discharge sintering back powder.When Pneumatic fan-shaped valve 19 is opened, sintering back powder falls from gathering bucket 12 end opening, and when Pneumatic fan-shaped valve 19 cuts out, sintering back powder rests on and gathers in bucket 12.
Pneumatic means comprises the solenoid directional control valve 16 of cylinder 15 and control cylinder 15 action be communicated with gas source pipe 18, solenoid directional control valve 16 is arranged on gas source pipe 18, the output of the control end connection control device of solenoid directional control valve 16, the work of solenoid directional control valve 16 is controlled by control device.The piston rod of cylinder 15 is connected with the control end of Pneumatic fan-shaped valve 19, and the keying of Pneumatic fan-shaped valve 19 is by the flexible realization of piston rod.When Pneumatic fan-shaped valve 19 needs action, control device controls the conducting state of solenoid directional control valve 16 with control cylinder 15 action, and then makes the piston rod of cylinder 15 drive the action of Pneumatic fan-shaped valve 19, realizes the blowing gathering bucket 12 feed opening.
Above-mentioned gas source pipe 18 is also provided with source of the gas three linked piece 17, source of the gas three linked piece 17 is made up of air reducing valve, filter, oil sprayer, with crossing filtration source of the gas, lubrication solenoid directional control valve 16 and cylinder 15, for the normal operation of solenoid directional control valve 16 and cylinder 15 provides Reliable guarantee.
In the present embodiment, the dischargeable capacity gathering bucket 12 is 12.5m
3, gather materials mouth square the length of side be of a size of 4000mm × 4000mm, feed opening square the length of side be of a size of 400mm × 400mm, total height is 1600mm, gather bucket 12 fill it up with sintering back powder after gross weight be 28.5 tons.Gathering bucket 12 selects Q345 plate to be made.The pressure of source of the gas is 0.75Mpa, and the cylinder diameter of cylinder 15 is 100mm, and the piston stroke of cylinder 15 is 200mm, and haul distance is less than the feed opening size gathering bucket 12.
The material level that adds gathering bucket 12 arranges guardrail.Gather above bucket 12 and arrange flue dust collecting bucket 13, flue dust collecting bucket 13 connects cleaning shaft 14, and cleaning shaft 14 is communicated with subsidiary factory final dusting house steward.Cleaning shaft 14 is set up an adjustable DN300mm butterfly valve, open in use, close when not using, reach the rational and efficient use of cleaner.
In the present embodiment, guardrail selects the round steel of Ф 45mm to make, and flue dust collecting bucket 13 sectional dimension is 4000mm × 4000mm, and cleaning shaft 14 diameter is Ф 325mm, and length is 35 meters.
Gather the gather materials lower edge of mouth of bucket 12 and be evenly equipped with more than three or three strong points, strong point place arranges LOAD CELLS 11, the input of the signal end connection control device of LOAD CELLS 11, for passing to control device in real time by bucket 12 actual weight that gathers recorded.On control device, display gathers the gross weight W2 of bucket 12 after filling gathering bucket 12 gross weight W1 and discharging a certain amount of sintering back powder of sintering back powder, and goes out to add the weight W of the sintering back powder in ladle 1 according to the mathematic interpolation of W1 and W2.Gather the lower of bucket 12 and arrange more than three or three LOAD CELLSs 11 along uniform, total carrying of all LOAD CELLSs 11 fills the gross weight after sintering back powder close to gathering bucket 12, can ensure the accuracy of weighing.
In the present embodiment, LOAD CELLS 11 is provided with 3, each LOAD CELLS 11 be carried as 10 tons.
Bucket type belt 10 is arranged on the below of gathering bucket 12.Bucket type belt 10 is ramped shaped, for accepting and transmitting sintering back powder.The charging aperture of bucket type belt 10 is positioned at and gathers immediately below bucket 12 feed opening, and the discharge end of bucket type belt 10 raises up to certain altitude.The two ends of bucket type belt 10 arrange the cylinder 9 of supporting drive belt, and the control end of cylinder 9 is connected with the output of control device, and the rotation of cylinder 9 is controlled by control device.The inclined vertical wheel of gear is set in bucket type belt 10 bilateral symmetry, to ensure the normal safe running of belt.Bucket type belt 10 both sides arrange belt support frame, the belt support frame of both sides fixes two nuts respectively side by side, screw rod is combined with in nut, one end of screw rod withstands on the bearing block of the cylinder 9 of bucket type belt 10 upper end, in order to regulate the distance between two cylinders 9, and then the degree of tightness of adjustment bucket type belt 10.
In the present embodiment, bucket type belt 10 overall length is 34 meters, and width is 500mm, and the angle that raises up is 31 ° 44 ' 9 ".Cylinder 9 diameter is 500mm, and bucket type belt 10 bilateral symmetry arranges 4 inclined vertical wheels of gear, and the nominal diameter of screw rod is M30, and length is 500mm, and drive motors power is 3.5kw, and belt support frame 12# channel-section steel makes.
Bucket type belt 10 raise up end discharge outlet blanking collection bucket 8 is set, the tremie pipe bottom of blanking collection bucket 8 is fixedly connected with guide duct 3, flow in ladle 1 for guiding sintering back powder, the outlet of guide duct 3 is positioned at above ladle 1, and guide duct 3 adopts the seamless steel pipe of Ф 325mm to be made.Adjustable for ensureing guide duct 3 position, the sintering back powder flowed out in guide duct 3 is made accurately to convert in molten iron, make the thawing effect that sintering back powder reaches best, arrange tumbler on the top of the tremie pipe of blanking collection bucket 8, tumbler comprises the worm gear 7 and worm screw 6 that are meshed, and the tremie pipe of blanking collection bucket 8 inserts the centre bore of worm gear 7, be fixedly connected with worm gear 7, worm screw 6 is driven by motor, and the output of the input connection control device of motor, is controlled by control device.Gripper shoe 20 is provided with below the tremie pipe of blanking collection bucket 8, gripper shoe 20 is for supporting blanking collection bucket 8, gripper shoe 20 is provided with bearing holder (housing, cover) 21, thrust ball bearing 4 and deep groove ball bearing 5 that blanking collection bucket 8 is rotated is set gradually from top to bottom in bearing holder (housing, cover) 21, thrust ball bearing 4 can bear the axial load of blanking collection bucket 8, and deep groove ball bearing 5 can radial location blanking collection bucket 8.Axle sleeve 22 is also provided with between thrust ball bearing 4 and deep groove ball bearing 5, to ensure the normal operation of thrust ball bearing 4 and deep groove ball bearing 5, non-interference.The upper surface of bearing holder (housing, cover) 21 is fixedly connected with end cap 23, for sealing, protection bearing.Tumbler operationally, first drive motors work is controlled by control device, motor drives worm screw 6 to rotate, worm screw 6 drives worm gear 7 to rotate, worm gear 7 drives guide duct 3 to rotate by the blanking collection bucket 8 be fixedly connected with it, make the outlet of guide duct 3 corresponding with the position that the molten iron of blast furnace exports 2, the molten iron enabling sintering back powder and the molten iron flowed out from guide duct 3 export 2 outflows in flow process namely mix, be fully dissolved in molten iron to make sintering back powder.In the rotary course of blanking collection bucket 8, with the inner ring of deep groove ball bearing 5, the blowout patche of thrust ball bearing 4 of the tremie pipe outer wall interference fit of blanking collection bucket 8 and rotate together with blanking collection bucket 8 with the axle sleeve 22 that the blowout patche of thrust ball bearing 4 presses together with the inner ring of deep groove ball bearing 5, be supported on the bearing holder (housing, cover) 21 in gripper shoe 20, with the outer ring of the deep groove ball bearing 5 of bearing holder (housing, cover) 21 endoporus interference fit, the seat ring of the thrust ball bearing 4 be supported in gripper shoe 20 and the end cap 23 then transfixion that is fixedly connected with bearing holder (housing, cover) 21.Namely intermeshing worm gear 7 worm screw 6 and deep groove ball bearing 5 ensure that together with thrust ball bearing 4 guide duct 3 can rotate freely, add that worm gear 7 worm screw 6 mechanism can realize being transferred to self-locking behind position, the blanking position regulating sintering back powder at any time can be ensured, ensure that it at utmost changes slag.
In the present embodiment, more than 1.5 ten thousand yuan are added up to equipment making transformation total cost, wherein comprises artificial and fee of material.The effect transformed with regard to this is below carried out Economic and Efficiency Analysis and can be found out: according to the production capacity of the current sheet slab of two steel-making, average monthly output 100,000 tons of qualified steel billets.After the present invention uses, steel technology, by original 1063Kg/T, is reduced to current 1049kg/T.By iron and steel stock per ton 2000 yuan calculating, the moon benefit be: 100000*(1063-1049)/1000*2000-10000=2790000 unit.Increase benefit in year as: 2790000*12=33480000 unit.
When the present invention works, control device is first according to the position of ladle and blast furnace, fully principle is fused to molten iron to enable exporting from guide duct 3 the sintering back powder exported, by the position that tumbler regulates guide duct 3 to export, the position that guide duct 3 is exported and ladle 1 to enter molten iron mouth corresponding.Then the information that control device is measured according to LOAD CELLS 11 again calculates the gravimetric value W of the sintering back powder of conveying in ladle 1 in real time, and according to the ruuning situation of this gravimetric value W and each parts, regulated the aperture of Pneumatic fan-shaped valve 19 by pneumatic means, and then control the discharge quantity gathering bucket 12; With the speed of travel of timed unit also by regulating drive motors to control bucket type belt 10, finally to realize the addition of sintering back powder amount and to add speed and control.
Claims (6)
1. for directly adding the device of sintering back powder in ladle, it is characterized in that: comprise exporting (2) corresponding ladle (1) of placing with the molten iron of blast furnace and holding the taper sintering back powder and gather struggle against (12), described in gather bucket (12) feed opening be provided with driven by pneumatic means, for controlling to sinter the Pneumatic fan-shaped valve (19) of back powder discharge; The below that correspondence gathers the feed opening of bucket (12) is provided with for accepting and transmitting the ramped shaped bucket type belt (10) sintering back powder, the charging aperture of described bucket type belt (10) is corresponding to the feed opening gathering struggle against (12), bucket type belt (10) raise up end discharge outlet be provided with blanking collection bucket (8), the tremie pipe bottom of blanking collection bucket (8) is fixedly connected with the guide duct (3) guiding sintering back powder to flow to, and the outlet of described guide duct (3) is positioned at ladle (1) top; The outlet of guide duct is corresponding with the position that the molten iron of blast furnace exports, and makes the sintering back powder flowed out from guide duct export with molten iron the molten iron flowed out and fully mixes before flowing into ladle;
The top of described blanking collection bucket (8) tremie pipe is provided with the tumbler for regulating guide duct (3) position; Described the gather materials lower edge of mouth of bucket (12) of gathering is evenly equipped with more than three or three for weighing the LOAD CELLS (11) gathering bucket (12) gross weight;
The signal end of described LOAD CELLS (11) is connected with control device, and the output of control device is respectively with pneumatic means, tumbler and drive the control end of bucket type belt (10) to be connected;
The motor that described tumbler comprises the worm gear (7) be fixedly connected with blanking collection bucket (8) tremie pipe top, the worm screw (6) be meshed with worm gear (7) and drives worm screw (6) to rotate, the output of the input connection control device of motor;
The gripper shoe (20) for supporting blanking collection bucket (8) is provided with below described blanking collection bucket (8) tremie pipe, gripper shoe (20) is provided with bearing holder (housing, cover) (21), thrust ball bearing (4) and deep groove ball bearing (5) that blanking collection bucket (8) is rotated is set gradually from top to bottom in bearing holder (housing, cover) (21), also be provided with axle sleeve (22) between thrust ball bearing (4) and deep groove ball bearing (5), bearing holder (housing, cover) (21) upper end arranges the end cap (23) for sealing;
Described pneumatic means comprises the cylinder (15) be communicated with gas source pipe (18) and the solenoid directional control valve (16) be arranged on for control cylinder (15) action on gas source pipe (18), the output of the control end connection control device of described solenoid directional control valve (16), the piston rod of cylinder (15) is connected with the control end of Pneumatic fan-shaped valve (19).
2. the device for directly adding sintering back powder in ladle according to claim 1, is characterized in that: described gas source pipe (18) is also provided with the source of the gas three linked piece (17) be made up of air reducing valve, filter, oil sprayer.
3. the device for directly adding sintering back powder in ladle according to claim 1, is characterized in that: described bucket type belt (10) bilateral symmetry is provided with the inclined vertical wheel of gear.
4. the device for directly adding sintering back powder in ladle according to claim 1, is characterized in that: described in gather bucket (12) the material level that adds be provided with guardrail.
5. the device for directly adding sintering back powder in ladle according to claim 4, is characterized in that: described in gather bucket (12) top flue dust collecting bucket (13) is set.
6. the device for directly adding sintering back powder in ladle according to claim 4, is characterized in that: described in gather bucket (12) cross section for square, the foursquare length of side of the mouth that gathers materials is greater than the foursquare length of side of feed opening.
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| CN201310115570.0A CN103194561B (en) | 2013-04-03 | 2013-04-03 | Device for directly adding sintering returned dust into ladle |
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| CN201310115570.0A CN103194561B (en) | 2013-04-03 | 2013-04-03 | Device for directly adding sintering returned dust into ladle |
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| CN103667579A (en) * | 2013-12-20 | 2014-03-26 | 德龙钢铁有限公司 | Iron adding process-based medium-high silicon molten iron desilication method |
| CN106628373A (en) * | 2016-10-31 | 2017-05-10 | 南宁市美嘉农饲料有限责任公司 | Feed sub-packaging device |
| CN115159164A (en) * | 2022-06-23 | 2022-10-11 | 上海康恒环境股份有限公司 | Slaked lime conveying system and control method thereof |
| CN116253168B (en) * | 2023-05-15 | 2023-11-24 | 雅安建寅建材(集团)有限公司 | Anti-collision charging car for transporting metal raw materials |
| CN117585327B (en) * | 2024-01-18 | 2024-04-09 | 秦皇岛昌德冶金科技有限公司 | Scrap steel weighing and discharging device for steel smelting |
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| CN2567936Y (en) * | 2002-12-26 | 2003-08-20 | 中冶集团北京冶金设备研究设计总院 | Powder spray device of precision dosing feeding for iron melt desulfurate |
| CN101074454A (en) * | 2007-04-06 | 2007-11-21 | 闫晓峰 | Process for manufacturing ultra-purity pig iron by oxidation |
| CN201354378Y (en) * | 2008-12-29 | 2009-12-02 | 中冶南方工程技术有限公司 | Pneumatic device of RH feeding system |
| CN102430881A (en) * | 2011-10-20 | 2012-05-02 | 奇瑞汽车股份有限公司 | Rotating structure of station apparatus |
| CN102676741A (en) * | 2012-05-29 | 2012-09-19 | 中天钢铁集团有限公司 | KR (knotted reactor) powder spraying, stirring and desulfurizing device and method |
| CN203200279U (en) * | 2013-04-03 | 2013-09-18 | 河北文丰钢铁有限公司 | Device capable of directly adding sintering returned dust into hot metal ladle |
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| CN103194561A (en) | 2013-07-10 |
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Effective date of registration: 20221110 Address after: 056300 east of Chongyi village, Shangtuan urban and rural areas, Wu'an city, Handan City, Hebei Province Patentee after: Jinan Iron and Steel Group Co.,Ltd. Address before: 056300, Hebei, Handan province Wuan City South Ring Road South Patentee before: HEBEI WENFENG IRON AND STEEL Co.,Ltd. |