CN203625449U - Micro-power hot air preheater for secondary sinter mixture - Google Patents
Micro-power hot air preheater for secondary sinter mixture Download PDFInfo
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- CN203625449U CN203625449U CN201320811642.0U CN201320811642U CN203625449U CN 203625449 U CN203625449 U CN 203625449U CN 201320811642 U CN201320811642 U CN 201320811642U CN 203625449 U CN203625449 U CN 203625449U
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- preheating
- heater unit
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- primary heater
- preheating oven
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- 239000000203 mixture Substances 0.000 title claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 34
- 238000005245 sintering Methods 0.000 claims abstract description 21
- 238000002485 combustion reaction Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000000446 fuel Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 15
- 150000001875 compounds Chemical class 0.000 description 7
- 230000008014 freezing Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010237 hybrid technique Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000036651 mood Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010010 raising Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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Abstract
The utility model discloses a micro-power hot air preheater for a secondary sinter mixture. The micro-power hot air preheater for the secondary sinter mixture comprises a preheating furnace (1) and a preheating fan (2), wherein a combustion chamber of the preheating furnace (1) is connected with a gas tube (3); an air outlet of the preheating fan (2) is connected to the preheating furnace (1); the preheating furnace (1) is connected with a secondary mixing barrel (4) and/or a mixture bunker. The preheating furnace is built near the secondary mixing barrel, hot air is generated by gas combustion, blast attemperation and pressure regulation, and the secondary mixture is be quickly heated to 65-80 DEG C. Thus, the aims that the transportation process is small in heat energy loss, and good in preheating effect, the quality of the secondary mixture is obviously improved, the utilization coefficient of a sintering machine is improved, and the sintering fuel consumption is reduced are achieved.
Description
Technical field
The utility model belongs to steel ore smelting tech field, is specifically related to one and can effectively improves sintered material temperature, reduces the sintering secondary mixed material microkinetic hot-air pre-heating device of production energy consumption.
Background technology
The energy consumption of SINTERING PRODUCTION generally accounts for 10～20% of steel-making energy consumption, 10 ℃ of the every raisings of compound and mini-pellets material temperature degree, and productivity of sintering machine can improve 5% left and right.General requirement, by more than the dew-point temperature of preheating of mixed material to 60 ~ 75 ℃, avoids crossing in sinter bed the formation of wet band, increases the ventilation property of sinter bed.
Mixing is the important procedure in sintering work, and its object is to make the composition of sintered material even, and moisture is suitable, is easy to pelletizing, thereby obtains the good sinter mixture of size composition, to guarantee the quality of agglomerate and to improve output.According to the difference of material condition, its mixture operation can adopt mixed once, and secondary mixes, and even three times are mixed.Take thin concentrate as main raw materials for sintering person, must adopt above mixing twice, with reduce-3mm grade.The main purpose of mixed once is to add water-wet, mix, and each component in moisture, granularity and the material in compound is uniformly distributed.Secondary mixes except continuing to mix, and main purpose is to granulate, and supplements wetting and heat mixture in advance, to improve permeability of sintering material bed.China's sintering plant adopts secondary hybrid technique mostly.
At present, steel enterprise sintering is produced in order to reduce fuel consumption, to the general employing of the preheating of the compound preheating of once returning mine, and can be by mixed material heating to 55～65 ℃; And rerolling preheating generally adopts superheated vapour to improve mixture temperature, make more than its temperature reaches dew point, to reduce moisture in compound, the final object that reduces burnup that realizes.There is following problem in current steam preheating:
(1) adopt steam-out (SO) preheating, the general access steel-making steam that adopts uses, but due to the restriction of iron and steel processing set-up, vapour pipe is far away apart from sintering mill (plant) mixing machine, cause thermosteresis larger, after warm air arrival secondary mixing drum, temperature only has 240 ℃ of left and right, and effect is poor, and heat utilization rate generally only has 35 ~ 50%;
(2) adopt the inner cogeneration steam of sintering system to use, its temperature, pressure are lower, and its superheat steam temperature only reaches 180 ℃ of left and right, and preheating speed is slow, weak effect;
Due to above reason, be necessary to improve secondary mixed material temperature by device in the situation that of conditions permit, make more than its temperature reaches dew point, to reduce moisture in compound, reach the object that reduces burnup.
Utility model content
The purpose of this utility model is to provide one can effectively improve sintered material temperature, reduces the sintering secondary mixed material microkinetic hot-air pre-heating device of production energy consumption.
The purpose of this utility model is achieved in that and comprises preheating oven, preheating fan, and described preheating oven combustion chamber is connected with gas line, and described preheating fan air outlet is connected to preheating oven, described preheating oven connecting secondary mixing drum and/or mixture ore trough.
The utility model by building preheating oven near secondary mixing drum, produce hot blast through fuel gas buring and air blast temperature adjustment, pressure regulation, can high secondary mixed material to 65 ~ 80 ℃ of Quick, make more than mixture temperature brings up to dew point, eliminated wet phenomenon, and make batch mixing even, tiny, strengthen and improve the ventilation property of the bed of material, improve bed of material vertical sintering speed, bed thickness is increased, output obviously improves, and reaches the batch mixing quality that reduces course of conveying heat-energy losses, obviously improves secondary mixing, the object that reduces sintering burnup.After batch mixing preheating, part replaces the solid-fuelled combustion heat, can reduce fuel consumption 2.5～5Kg/t.By the heating duct of hot blast band shower nozzle is being passed into and blowing to batch mixing from rerolling cylinder head, thereby the surface-area of increase warm air and secondary mixed material promotes heat exchange, improves heat utilization rate; By the hot blast shower nozzle of heating duct, Open Side Down and jet angle is made as 60 ~ 120 °, can further improve the contact area of hot blast and secondary mixed material, be conducive to improve rapidly secondary mixed material temperature, and shower nozzle Open Side Down has also avoided compound to enter shower nozzle resulting in blockage, improved the work reliability of shower nozzle; By flow sensor being set at hot-air mouth, at preheating fan and/or gas line outlet, flow sensor is set, in gas line, tap changer is set, temperature, pressure and flow sensor are connected with control device signal, control device is connected with preheating fan signal and controls its rotating speed and/or be connected with the tap changer signal of gas line and control its pressure, thereby according to the different properties of batch mixing and filling ratio, by the hot-blast outlet temperature and pressure of control device capable of regulating preheating oven.
Accompanying drawing explanation
Fig. 1 is the utility model one-piece construction schematic diagram;
In figure: 1-preheating oven, 11-heat exchanger, 12-temperature sensor, 13-pressure transmitter, 2-preheating fan, 21-flow sensor, 3-gas line, 31-tap changer, 32-flow sensor, bis-mixing drums of 4-, 5-heating duct, 51-hot blast shower nozzle.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described, but must not be limited the utility model by any way, any change or the improvement done based on the utility model training centre, all belong to protection domain of the present utility model.
As shown in Figure 1, the utility model comprises preheating oven 1, preheating fan 2, and described preheating oven 1 combustion chamber is connected with gas line 3, and described preheating fan 2 air outlets are connected to preheating oven 1, described preheating oven 1 connecting secondary mixing drum 4 and/or mixture ore trough.
Described preheating oven 1 is provided with heat exchanger 11, and the air outlet of described preheating fan 2 is connected with heat exchanger 11 entrances, and described heat exchanger 11 outlets extend to secondary mixing drum 4 and/or mixture ore trough.
In described secondary mixing drum 4, be provided with the heating duct 5 that hot blast shower nozzle 51 is installed.
Described preheating oven 1 is communicated with heating duct 5 through secondary mixing drum 4 feeding mouths.
Open Side Down and jet angle is 60 ~ 120 ° for described hot blast shower nozzle 51.
Described primary heater unit also comprises control device 6, and described gas line 3 is provided with tap changer 31, and described control device 6 is with preheating fan 2 and/or be electrically connected with tap changer 31.
Described preheating fan 2 outlets are provided with flow sensor 21 and/or gas line 3 outlets are provided with flow sensor 32, the hot-blast outlet of described preheating oven 1 is provided with temperature sensor 12 and pressure transmitter 13, and described temperature, pressure and flow sensor are connected with control device 6 signals.
the utility model principle of work and working process:
The utility model by building preheating oven near secondary mixing drum, through introducing blast furnace gas or external combustion of natural gas production high temperature hot gas, simultaneously to sending into freezing air temperature adjustment with preheating fan in preheating oven, pressure regulation produces hot blast, hot blast passes in secondary mixing drum and/or mixture ore trough, thereby the high secondary of Quick mixture temperature to 65 ~ 80 ℃, make more than mixture temperature brings up to dew point, eliminated wet phenomenon, and make batch mixing even, tiny, strengthen and improve the ventilation property of the bed of material, improve bed of material vertical sintering speed, bed thickness is increased, output obviously improves, reach and reduce course of conveying heat-energy losses, obviously improve the batch mixing quality that secondary mixes, reduce the object of sintering burnup.By to after batch mixing preheating, partly replace the solid-fuelled combustion heat, can reduce fuel consumption 2.5～5Kg/t.By heat exchanger is set in preheating oven, realize and send into separating of cleaned air and combustion exhaust, can effectively improve the quality to preheating batch mixing, reduce the impact of waste gas objectionable constituent; Also can directly in preheating oven, pass into freezing air, through with burning general mood mix and with the heat exchange of heat exchanger, thereby obtain the hot blast of desired temperature and pressure; By the heating duct of hot blast band shower nozzle is passed into and blows to batch mixing from rerolling cylinder head, thereby the surface-area of increase warm air and secondary mixed material promotes heat exchange, improves heat utilization rate; By the hot blast shower nozzle of heating duct, Open Side Down and jet angle is made as 60 ~ 120 °, can further improve the contact area of hot blast and secondary mixed material, be conducive to improve rapidly secondary mixed material temperature, and shower nozzle Open Side Down has also avoided compound to enter shower nozzle resulting in blockage, improved the work reliability of shower nozzle; By flow sensor being set at hot-air mouth, at preheating fan and/or gas line outlet, flow sensor is set, in gas line, tap changer is set, temperature, pressure and flow sensor are connected with control device signal, control device is connected with preheating fan signal and controls its rotating speed and/or be connected with the tap changer signal of gas line and control its pressure, thereby according to the different properties of batch mixing and filling ratio, by the hot-blast outlet temperature and pressure of control device capable of regulating preheating oven.
In the combustion chamber of preheating oven 1, pass into blast furnace gas by gas line 3, ignition; Then start preheating fan 2 and pass into freezing air to the heat exchanger 11 in preheating oven 1, or directly in preheating oven 1, pass into freezing air, make freezing air be heated to 500～550 ℃ by heat exchanger 11 heat exchanges or cold and hot mixing and form hot blast, pass into its inside from secondary mixing drum 4 feeding mouths by the heating duct 5 that hot blast shower nozzle 51 is installed, hot blast through hot blast shower nozzle 51 high-velocity jet to secondary mixed material, pass into mixture ore trough by another heating duct 5 simultaneously, secondary mixed material is completed and preheated.
Of the present utility model simple in structure, overall work is reliable and stable, can effectively reduce course of conveying heat-energy losses, obviously improves the batch mixing quality that secondary mixes, thereby improves productivity of sintering machine, reduces sintering burnup.
Claims (7)
1. a sintering secondary mixed material microkinetic hot-air pre-heating device, comprise preheating oven (1), preheating fan (2), it is characterized in that: described preheating oven (1) combustion chamber is connected with gas line (3), described preheating fan (2) air outlet is connected to preheating oven (1), described preheating oven (1) connecting secondary mixing drum (4) and/or mixture ore trough.
2. primary heater unit according to claim 1, it is characterized in that: described preheating oven (1) is provided with heat exchanger (11), the air outlet of described preheating fan (2) is connected with heat exchanger (11) entrance, and described heat exchanger (11) outlet extends to secondary mixing drum (4) and/or mixture ore trough.
3. primary heater unit according to claim 1 and 2, is characterized in that: in described secondary mixing drum (4), be provided with the heating duct (5) that hot blast shower nozzle (51) is installed.
4. primary heater unit according to claim 3, is characterized in that: described preheating oven (1) is communicated with heating duct (5) through secondary mixing drum (4) feeding mouth.
5. primary heater unit according to claim 3, is characterized in that: Open Side Down and jet angle is 60 ~ 120 ° for described hot blast shower nozzle (51).
6. primary heater unit according to claim 1, it is characterized in that: described primary heater unit also comprises control device (6), described gas line (3) is provided with tap changer (31), described control device (6) and preheating fan (2) and/or be electrically connected with tap changer (31).
7. primary heater unit according to claim 6, it is characterized in that: described preheating fan (2) outlet is provided with flow sensor (21) and/or gas line (3) outlet is provided with flow sensor (32), the hot-blast outlet of described preheating oven (1) is provided with temperature sensor (12) and pressure transmitter (13), and described temperature, pressure and flow sensor are connected with control device (6) signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320811642.0U CN203625449U (en) | 2013-12-11 | 2013-12-11 | Micro-power hot air preheater for secondary sinter mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320811642.0U CN203625449U (en) | 2013-12-11 | 2013-12-11 | Micro-power hot air preheater for secondary sinter mixture |
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| Publication Number | Publication Date |
|---|---|
| CN203625449U true CN203625449U (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320811642.0U Expired - Lifetime CN203625449U (en) | 2013-12-11 | 2013-12-11 | Micro-power hot air preheater for secondary sinter mixture |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103614549A (en) * | 2013-12-11 | 2014-03-05 | 武钢集团昆明钢铁股份有限公司 | Micro-power hot air preheating method and device for sintering secondary mixture |
| CN107557571A (en) * | 2016-06-30 | 2018-01-09 | 鞍钢股份有限公司 | A kind of sinter mixture preheating and the method and device of cloth |
| CN107894161A (en) * | 2017-12-18 | 2018-04-10 | 苏州科尔珀恩机械科技有限公司 | Lithium battery two-chamber sintering furnace |
-
2013
- 2013-12-11 CN CN201320811642.0U patent/CN203625449U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103614549A (en) * | 2013-12-11 | 2014-03-05 | 武钢集团昆明钢铁股份有限公司 | Micro-power hot air preheating method and device for sintering secondary mixture |
| CN103614549B (en) * | 2013-12-11 | 2015-07-08 | 武钢集团昆明钢铁股份有限公司 | Micro-power hot air preheating method and device for sintering secondary mixture |
| CN107557571A (en) * | 2016-06-30 | 2018-01-09 | 鞍钢股份有限公司 | A kind of sinter mixture preheating and the method and device of cloth |
| CN107894161A (en) * | 2017-12-18 | 2018-04-10 | 苏州科尔珀恩机械科技有限公司 | Lithium battery two-chamber sintering furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180516 Address after: 661100 Mengzi City, Honghe state, Yunnan Province, the town of rain over the town Patentee after: HONGHE IRON & STEEL Co.,Ltd. Address before: 650300 Yunnan Kunming Anning City Kungang Limited by Share Ltd Patentee before: WUGANG GROUP KUNMING IRON AND STEEL Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140604 |
|
| CX01 | Expiry of patent term |