CN104251622B - A kind of suspension smelting furnace nozzle - Google Patents
A kind of suspension smelting furnace nozzle Download PDFInfo
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- CN104251622B CN104251622B CN201310268986.6A CN201310268986A CN104251622B CN 104251622 B CN104251622 B CN 104251622B CN 201310268986 A CN201310268986 A CN 201310268986A CN 104251622 B CN104251622 B CN 104251622B
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- mixed air
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Abstract
The invention provides a kind of suspension smelting furnace nozzle, comprise the central oxygen pipe of suit, pre-mixed air ring tube and emission of baiting chute from the inside to the outside successively; The length of pre-mixed air ring tube is the 1/3-1/2 of central oxygen length of tube, and the length of emission of baiting chute is 1.1-1.6 times of pre-mixed air ring tube length; Pre-mixed air ring tube lower end inside arranges pre-mixed air swirl-flow devices, and pre-mixed air swirl-flow devices comprises some the first guide vanes be connected with pre-mixed air ring tube inwall, and the angle of the first guide vane and pre-mixed air ring tube inwall tangent line is 120 °-160 °.Apparatus of the present invention adopt the layout type of fertilizer interlayer, have that control is good, the uniform beneficial effect of gas grain two-phase mixtures; Respectively from the premix that swirling eddy and the concentrate particle of pre-mixed air ring tube and emission of baiting chute ejection realize into stokehold, the gas grain two-phase mixtures objects system entering reacting furnace is even, improves the fire location of concentrate particle, accelerates melting reaction and carry out, improve smelting efficiency.
Description
Technical field
The present invention relates to metallurgical industry apparatus field, especially, relate to a kind of suspension smelting furnace nozzle.
Background technology
Smelting in suspension mainly makes full use of the huge active surface of fine grinding material, and dry solid material particle is contacted with oxygen in reacting furnace, under hot conditions, completes controllable oxidization reaction, release amount of heat, realize autogenous smelting with high speed.Smelting in suspension has the advantages such as productivity ratio is high, environmental benefit is remarkable, and its Typical Representative such as the flash smelting process of copper, nickel metal and base husband Saite refine plumbous process.
Spray nozzle for metallurgy is the nucleus equipment of smelting in suspension technique, mainly contains Venturi type concentrate burner and Central jet concentrate burner.Smelting in suspension reacting furnace adopts Central jet concentrate burner mostly in the world at present, and present Central jet concentrate burner developed into for the 5th generation---with the Central jet concentrate burner of central oil gun.It is on the basis of forth generation concentrate burner, at heavy oil (or natural gas) burner that central oxygen pipe inside insertion one is concentric; Mainly comprise concentric oxygen hose, emission of baiting chute, the hyperbolic type dispersion cone for material dispersion waits device.The Central jet concentrate burner treating capacity in the 5th generation can reach 160-200t/h.When entering stove concentrate amount and reaching more than 200t/h, easily occur concentrate and oxygen mix inequality, concentrate particle ignition lag, oxygen utilization rate is low, even occurs problems such as " lower raw material ".
Summary of the invention
The object of the invention is to provide a kind of suspension smelting furnace nozzle, to solve the technical problem of above-mentioned concentrate and oxygen mix inequality.
For achieving the above object, the invention provides a kind of suspension smelting furnace nozzle, comprise the central oxygen pipe of suit, pre-mixed air ring tube and emission of baiting chute from the inside to the outside successively; The length of described pre-mixed air ring tube is the 1/3-1/2 of described central oxygen length of tube, and the length of described emission of baiting chute is 1.1-1.6 times of described pre-mixed air ring tube length;
Described pre-mixed air ring tube lower end inside arranges pre-mixed air swirl-flow devices, described pre-mixed air swirl-flow devices comprises some the first guide vanes be connected with pre-mixed air ring tube inwall, and the angle of described first guide vane and described pre-mixed air ring tube inwall tangent line is 120 °-160 °.
Preferably, overlook downwards from described pre-mixed air ring tube top, the incline direction of described first guide vane is counterclockwise.
Preferably, from described pre-mixed air ring tube side, the angle of described first guide vane and horizontal plane is 30 °-70 °.
Preferably, the outside of described emission of baiting chute is set with secondary air channel, and described secondary air channel inwall arranges Secondary Air speed regulator, and described Secondary Air speed regulator comprises some braces, and described brace and described secondary air channel inwall are half to be flexibly connected.
Preferably, the bottom of described emission of baiting chute is connected with inverted diffusing cone, and the opening sleeve of described diffusing cone is contained in central oxygen pipe periphery.
Preferably, the cone angle of described diffusing cone is 30-60 °.
Preferably, the bottom interior wall of described diffusing cone is arranged some dispersion air holes, the diameter of described dispersion air holes is 5-10mm.
Preferably, the lower end inside of described central oxygen pipe arranges central oxygen swirl-flow devices, described central oxygen swirl-flow devices comprises some the second guide vanes be connected with central oxygen inside pipe wall, and the angle of described second guide vane and described central oxygen inside pipe wall tangent line is 120 °-160 °.
Apparatus of the present invention adopt the layout type of fertilizer interlayer, have that control is good, the uniform beneficial effect of gas grain two-phase mixtures:
A, pre-confounding is set at pre-mixed air ring tube and emission of baiting chute lower end, make respectively from the premix that swirling eddy and the concentrate particle of pre-mixed air ring tube and emission of baiting chute ejection realize into stokehold, make the gas grain two-phase mixtures objects system entering reacting furnace even, improve the fire location of concentrate particle, accelerate the carrying out of melting reaction, improve smelting efficiency;
B, pre-mixed air ring tube lower end inside arrange pre-mixed air swirl-flow devices, and guide vane is skewed, make the air-flow sprayed by impeller clearance have rotational characteristics, strengthen and the mixing velocity of solid particle and dynamics;
C, diffusing cone lower sidewalls distributed multiple dispersion air holes, from the dispersion wind of dispersion hole ejection to peptizaiton material;
Secondary Air speed regulator in D, secondary air channel is made up of multiple brace, by regulating the size of lap between brace, can change external diameter when Secondary Air enters stove, thus changing the cross-sectional area that Secondary Air enters stove, regulating Secondary Air velocity magnitude.
By Numerical Simulation, under high-performance premixed type concentrate burner structure of the present invention, concentrate particle catches fire and obviously obtains in advance, and the induction zone that catches fire shortens, and flash smelting efficiency is improved.Under high inventory under (>200t/h) operating mode, compared to Central jet concentrate burner, the position that premixed type concentrate burner of the present invention can accelerate concentrate particle 1.5 ~ 2m catches fire, and oxygen utilization rate is high, dust rate is low.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the nozzle arrangements schematic diagram of the preferred embodiment of the present invention;
Fig. 2 is the pre-mixed air swirl-flow devices top view of the preferred embodiment of the present invention;
Fig. 3 is the pre-mixed air swirl-flow devices side view of the preferred embodiment of the present invention;
Fig. 4 is the central oxygen swirl-flow devices top view of the preferred embodiment of the present invention;
Fig. 5 is the Secondary Air speed regulator top view of the preferred embodiment of the present invention;
Wherein, 1, central natural gas tube, 2, central oxygen swirl-flow devices, 3, central oxygen pipe, 4, dispersion air holes, 5, diffusing cone, 6, pre-confounding, 7, Secondary Air speed regulator, 8, pre-mixed air cyclone, 9, emission of baiting chute, 10, the first guide vane, 11, pre-mixed air ring tube, the 12, second guide vane, 13, secondary air channel.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can limit according to claim and cover is implemented.
See Fig. 1, a kind of suspension smelting furnace nozzle, from comprising the central natural gas tube 1 entering natural gas of suit, central oxygen pipe 3, pre-mixed air ring tube 11 and emission of baiting chute 9 outside interior successively; The length of described pre-mixed air ring tube 11 is the 1/3-1/2 of described central oxygen pipe 3 length, and the length of described emission of baiting chute 9 is 1.1-1.6 times of described pre-mixed air ring tube 11 length; So, pre-confounding 6 can be formed in the lower end of emission of baiting chute 9 and pre-mixed air ring tube 11, swirling eddy and concentrate particle are mixed entering stokehold.
Described pre-mixed air ring tube 11 lower end inside arranges pre-mixed air swirl-flow devices 8, described pre-mixed air swirl-flow devices 8 comprises some the first guide vanes 10 be connected with pre-mixed air ring tube 11 inwall, the angle β of described first guide vane 10 and described pre-mixed air ring tube 11 inwall tangent line
1be 120 °-160 °, then limit the angular dimension of flow rotation, thus control the rotation dynamics of air-flow.
See Fig. 2, overlook downwards from described pre-mixed air ring tube 11 top, the incline direction of described first guide vane 10 is counterclockwise, is beneficial to the mixing of concentrate particle rotation.
See Fig. 3, from described pre-mixed air ring tube 11 side, the angle α of described first guide vane 10 and horizontal plane
1it is 30 °-70 °, for changing airflow direction.
See Fig. 4, the lower end inside of described central oxygen pipe 3 arranges central oxygen swirl-flow devices 2, described central oxygen swirl-flow devices 2 comprises some the second guide vanes 12 be connected with central oxygen pipe 3 inwall, the angle β of described second guide vane 12 and described central oxygen pipe 3 inwall tangent line
2it is 120 °-160 °.Central authorities' oxygen swirl-flow devices 2 is similar to the structure of pre-mixed air swirl-flow devices 8, and because the diameter of central oxygen pipe is little, the second guide vane 12 quantity comparatively will be lacked in pre-mixed air swirl-flow devices first guide vane 10.
See Fig. 5, the outside of described emission of baiting chute 9 is set with Secondary Air speed regulator 7, described Secondary Air speed regulator 7 is positioned at the inwall of secondary air channel 13, Secondary Air speed regulator 7 comprises some braces, described brace and described secondary air channel 13 inwall are half to be flexibly connected, the size of lap between adjustable brace, changes the size of external diameter R0 when Secondary Air enters stove, thus changes Secondary Air velocity magnitude.
The bottom of described emission of baiting chute 9 is connected with inverted diffusing cone 5, and the opening sleeve of described diffusing cone 5 is contained in central oxygen pipe 3 periphery.Diffusing cone 5 guides concentrate material to external diffusion, is beneficial to material dispersion.
The cone angle gamma of described diffusing cone 5 is 30-60 °, the angle of restriction material diffusion and size.
The bottom interior wall of described diffusing cone 5 arranges some dispersion air holes 4, and the diameter of described dispersion air holes 4 is 5-10mm, from the dispersion wind of dispersion air holes ejection, carries out second time dispersion, ensure mixed effect to material.
From the overall structure of Fig. 1, central natural gas tube 1 is positioned at the center of whole concentrate burner, is concentric central oxygen pipe 3, pre-mixed air ring tube 11, emission of baiting chute 9 and outermost secondary air channel 13 from inside to outside respectively.The diameter of central authorities' natural gas tube 1 can be 50-80mm, and the diameter of outer central oxygen pipe 3 can be 60-120mm.The inner and outer ring radius of pre-mixed air ring tube 11 can be 200-400mm, within the scope of 400-800mm respectively.The diameter of emission of baiting chute 9 can be 500-1000mm, and the diameter of secondary air channel 13 can be 800-1200mm.
The bottom of central oxygen pipe 3, pre-mixed air ring tube 11 is equipped with central oxygen swirl-flow devices 2 and pre-mixed air swirl-flow devices 8 respectively, and the altitude range of central oxygen swirl-flow devices 2, pre-mixed air swirl-flow devices 8 can be 50-200mm, 100-500mm respectively.
Outside the outlet of pre-mixed air swirl-flow devices 8, the bottom of emission of baiting chute 9 is pre-confoundings 6 of concentrate powder and pre-mixed air, and the size of pre-confounding 6 can be regulated by the relative position of change emission of baiting chute 9, pre-mixed air ring tube 11; The below of pre-confounding 6, be conical bluff body diffusing cone 5 outside central oxygen pipe 3, the lower section diameter of diffusing cone 5 can be 300-800mm, has multiple dispersion air holes 4 below diffusing cone 5, and dispersion air holes footpath can be 5-10mm.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a suspension smelting furnace nozzle, is characterized in that, comprises the central oxygen pipe of suit, pre-mixed air ring tube and emission of baiting chute from the inside to the outside successively; The length of described pre-mixed air ring tube is the 1/3-1/2 of described central oxygen length of tube, and the length of described emission of baiting chute is 1.1-1.6 times of described pre-mixed air ring tube length;
Described pre-mixed air ring tube lower end inside arranges pre-mixed air swirl-flow devices, described pre-mixed air swirl-flow devices comprises some the first guide vanes be connected with pre-mixed air ring tube inwall, and the angle of described first guide vane and described pre-mixed air ring tube inwall tangent line is 120 °-160 °;
Outside the outlet of pre-mixed air swirl-flow devices, the bottom of emission of baiting chute is the pre-confounding of concentrate powder and pre-mixed air, and the size of pre-confounding is regulated by the relative position of emission of baiting chute, pre-mixed air ring tube; The bottom of emission of baiting chute is connected with inverted diffusing cone.
2. a kind of suspension smelting furnace nozzle according to claim 1, is characterized in that, overlooks downwards from described pre-mixed air ring tube top, and the incline direction of described first guide vane is counterclockwise.
3. a kind of suspension smelting furnace nozzle according to claim 1, is characterized in that, from described pre-mixed air ring tube side, the angle of described first guide vane and horizontal plane is 30 °-70 °.
4. a kind of suspension smelting furnace nozzle according to claim 1, it is characterized in that, the outside of described emission of baiting chute is set with secondary air channel, described secondary air channel inwall arranges Secondary Air speed regulator, described Secondary Air speed regulator comprises some braces, and described brace and described secondary air channel inwall are half to be flexibly connected.
5. a kind of suspension smelting furnace nozzle according to any one of Claims 1-4, is characterized in that, the bottom of described emission of baiting chute is connected with inverted diffusing cone, and the opening sleeve of described diffusing cone is contained in central oxygen pipe periphery.
6. a kind of suspension smelting furnace nozzle according to claim 5, is characterized in that, the cone angle of described diffusing cone is 30-60 °.
7. a kind of suspension smelting furnace nozzle according to claim 5, is characterized in that, the bottom interior wall of described diffusing cone is arranged some dispersion air holes, and the diameter of described dispersion air holes is 5-10mm.
8. a kind of suspension smelting furnace nozzle according to claim 1, it is characterized in that, the lower end inside of described central oxygen pipe arranges central oxygen swirl-flow devices, described central oxygen swirl-flow devices comprises some the second guide vanes be connected with central oxygen inside pipe wall, and the angle of described second guide vane and described central oxygen inside pipe wall tangent line is 120 °-160 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310268986.6A CN104251622B (en) | 2013-06-28 | 2013-06-28 | A kind of suspension smelting furnace nozzle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310268986.6A CN104251622B (en) | 2013-06-28 | 2013-06-28 | A kind of suspension smelting furnace nozzle |
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| Publication Number | Publication Date |
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| CN104251622A CN104251622A (en) | 2014-12-31 |
| CN104251622B true CN104251622B (en) | 2016-04-13 |
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| CN201310268986.6A Active CN104251622B (en) | 2013-06-28 | 2013-06-28 | A kind of suspension smelting furnace nozzle |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561587B (en) * | 2015-01-20 | 2017-01-18 | 铜陵有色金属集团股份有限公司金冠铜业分公司 | Concentrate jet nozzle of smelting furnace |
| CN104561586B (en) * | 2015-01-20 | 2017-01-18 | 铜陵有色金属集团股份有限公司金冠铜业分公司 | Concentrate nozzle of flash smelting furnace |
| CN110777265B (en) * | 2019-12-02 | 2024-02-20 | 江西铜业股份有限公司 | Concentrate nozzle of cyclone diffusion type flash furnace |
| CN110804702B (en) * | 2019-12-02 | 2024-09-27 | 江西铜业股份有限公司 | Concentrate burner for flash smelting |
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|---|---|---|---|---|
| EP2198063A1 (en) * | 2007-09-05 | 2010-06-23 | Outotec OYJ | Concentrate burner |
| CN201548066U (en) * | 2009-11-26 | 2010-08-11 | 阳谷祥光铜业有限公司 | Pulsation rotational flow spray nozzle for copper smelting |
| CN102560144A (en) * | 2012-02-09 | 2012-07-11 | 金隆铜业有限公司 | Double rotational flow premix type metallurgical nozzle |
| CN203421974U (en) * | 2013-06-28 | 2014-02-05 | 中南大学 | Suspension smelting furnace nozzle |
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2013
- 2013-06-28 CN CN201310268986.6A patent/CN104251622B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2198063A1 (en) * | 2007-09-05 | 2010-06-23 | Outotec OYJ | Concentrate burner |
| CN201548066U (en) * | 2009-11-26 | 2010-08-11 | 阳谷祥光铜业有限公司 | Pulsation rotational flow spray nozzle for copper smelting |
| CN102560144A (en) * | 2012-02-09 | 2012-07-11 | 金隆铜业有限公司 | Double rotational flow premix type metallurgical nozzle |
| CN203421974U (en) * | 2013-06-28 | 2014-02-05 | 中南大学 | Suspension smelting furnace nozzle |
Non-Patent Citations (1)
| Title |
|---|
| 《金隆闪速炉精矿喷嘴运行实践》;周俊等;《冶矿》;20100331;第9卷(第1期);51-58 * |
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| CN104251622A (en) | 2014-12-31 |
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