CN104634101A - Same-direction rotary-floating smelting method, nozzle and metallurgical equipment - Google Patents
Same-direction rotary-floating smelting method, nozzle and metallurgical equipment Download PDFInfo
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Abstract
The invention discloses a same-direction rotary-floating smelting method. The method includes that powdery sulphide concentrate and oxygen-containing gas are sprayed into space of a high-temperature reaction tower through equipment; the oxygen-containing gas is divided into two parts before entering the equipment, and second oxygen-containing gas is sprayed into the reaction tower by means of annular rotational flow to form a bell-shaped rotating air curtain; first oxygen-containing gas is converted into rotary jet flow through the equipment and injected at the center of the rotating air curtain; in an annular space between two branches of the rotating air flow, the concentrate enters in a direction deflecting to the center, is drawn into by the oxygen-containing gas and sucks high-temperature smoke on the lower portion of the reaction tower to form two-phase rotating jet flow with gas and particle mixed; when being ignited by high temperature, the sulphide concentrate is in drastic burning reaction with oxygen and releases SO2-enriched smoke and forms mixed melt containing sulfonium (or metal) and slag, and sulfonium (or metal) and slag are separated at the bottom of the reaction tower to complete metallurgical process. The invention further provides metallurgical equipment and a same-direction rotary floating smelting nozzle thereof.
Description
Technical field
The present invention relates to technical field of non-ferrous metallurgy, particularly melting contains the metal sulfide fine ores such as copper, nickel, lead, zinc and obtains the sulphur even method and apparatus of metal product.
Background technology
In pyrometallurgy industry, melting sulfide concentrate is exactly utilize the sulphur in sulfide mine and iron and oxygen to react finally to be removed and obtain the process of metal.Fire metallurgy process is broadly divided into bath smelting and the large class of space melting two, the essence of space smelting in suspension is exactly the huge surface area utilizing dry rear powdery sulfide mine, material particle is fully combined with oxygen, within moment (2 ~ 3 seconds), completes oxidation reaction.Space smelting in suspension is most widely used is that Finland scientist is in the Outokumpu flash smelting of invention in 1949; what its technique core adopted is direct current spraying technique; due to by the impact of DC characteristic, in production, usually there will be that coefficient of oxygen utilization is low, dust rate is high, furnace lining is washed seriously corroded, concentrate does not react and be piled into the malignant condition such as raw material heap in stove.Along with smelting technique is to " four is high " future development of high inventory, high load capacity, high oxygen concentration and high operating rate, direct current spraying technique is more and more difficult adapts to modern pyrometallurgy requirement.
In recent years, swirl injection technology obtains good application in pyrometallurgy industry, as the method for contribution in Chinese patent (patent No.: ZL200910230500.3), but the method has met with equipment attrition seriously aborning, and concentrate flow is sorted the situation causing reaction segregation; Improved plan is as the method for contribution in Chinese patent (patent No.: ZL201020284998.X and ZL201110208013.4), these two kinds of methods are all be arranged in by concentrate on the outer ring of reaction air swirl completely, rely on eddy flow expansion to drive the mixing rotary fluid of concentrate Particles Moving formation High Rotation Speed and complete mass transfer, the heat transfer of gas intergranular.But said method has following problem in production practices: because outside rotary fluid, the amount of entrainmenting is excessive, cause a large amount of reacted high temperature gases recirculating to reaction tower top, cause the loss of reaction tower top too fast; For individual concentrate particle, the nature differences such as its physical specification, proportion, chemical composition are comparatively large, and swirl strength can regulate but be difficult to control, and too small being not enough to drives particle to rotate, and excessively there will be finning again and damage body of heater; Reacting gas spreads from inside to outside, and when arriving material ring outer ring, most of oxygen is consumed, causes and expects that the concentrate particle of ring outer ring cannot be oxidized.
Summary of the invention
In view of this, the invention provides a kind of newly revolve floating method of smelting in the same way, to solve the technical problem occurred in above-mentioned process program.
The invention provides a kind of realize said method revolve floating melting nozzle in the same way.
The invention provides and a kind ofly apply the above-mentioned metallurgical equipment revolving floating melting nozzle in the same way.
For achieving the above object, the invention provides following technical scheme:
One revolves floating method of smelting in the same way, is ejected in the space of the reaction tower of high temperature by the powdery vulcanised ore concentrate of drying and the oxygen-containing gas of corresponding amount, the arrangement of features in " wind ~ ore deposit ~ wind " on horizontal plane; Wherein:
Oxygen-containing gas comprises the first oxygen-containing gas and the second oxygen-containing gas: the mode that the second oxygen-containing gas rotates with ring-type sprays in reaction tower, and in reaction tower the horizontal flaring of effect formation, the bell shape rotary wind screen that vertically extends of high temperature and rotary expansion of certainly experiencing; First oxygen-containing gas is converted into the center that rotating jet is injected into rotary wind screen, and rotary wind screen is identical with the direction of rotation of rotating jet;
To enter in the annulus between rotating jet and rotary wind screen two strands of air-flows with the direction of being partial to central axis through the dry vulcanised ore concentrate of measure control;
At the center of air curtain, the rotating jet of High Rotation Speed is involved in vulcanised ore concentrate and the high temperature gas flow from reaction tower bottom to the extension movement of surrounding simultaneously, forms horizontal direction rotary expansion, gas grain two-phase rotating jet straight down; Rotate stronger two-phase rotating jet outwards further to expand and rotated more weak rotary wind screen and limit, to stop the generation of finning, compensate the oxygen gesture of two-phase rotating jet outer ring simultaneously;
In the process of motion, vulcanised ore concentrate is lighted by the high temperature of radiation in high-temperature flue gas and reaction tower, violent combustion reaction occurs and discharges to be rich in SO with oxygen
2flue gas, simultaneous reactions generates the mixed melting thing containing sulfonium (or metal) and slag, and finally in the bottom of reaction tower, sulfonium (or metal) is separated with slag, completes metallurgical process.
Preferably, the first described oxygen-containing gas and the second oxygen-containing gas are same reacting gas, have identical pressure, temperature and oxygen content, and its oxygen content is 25% ~ 95% (wt).
Preferably, in the first described oxygen-containing gas and the second oxygen-containing gas, institute is oxygen containing and be the required total amount of vulcanised ore concentrate reaction, and allocation proportion is 20% ~ 80% (volume ratio).
Preferably, swirl strength >=0.5 of described rotating jet; Swirl strength≤0.3 of described rotary wind screen.
Preferably, described dry powdery vulcanised ore concentrate refers to the sorting mined material containing Cu, Ni, Pb and/or Zn metal sulfide.
As can be seen from above-mentioned technical scheme, provided by the inventionly revolve floating method of smelting in the same way, vulcanised ore concentrate is arranged on the centre of two-layer reaction oxygen-containing gas, in the middle of utilizing, the oxygen-containing gas of High Rotation Speed is to surrounding extension movement, be involved in vulcanised ore concentrate and the high temperature gas flow from reaction tower bottom simultaneously, form horizontal direction rotary expansion, gas grain two-phase rotating jet vertically downward.When gas grain two-phase rotating jet expands outwardly the inwall curtain wall arriving rotating Vortex air curtain, be subject to the control that air curtain holds together to gather effect, stop its chaotic expansive outside further, to eliminate finning; Rotating Vortex air curtain the outer ring of gas grain two-phase rotating jet uninterruptedly to its supplement outside needed for entrainment air quantity, with the oxygen gesture of complemental air grain two-phase rotating jet outer ring, simultaneously, because the spin intensity of rotary wind screen is more weak, the amount of entrainmenting of its outer ring is less, avoid reacted high-temperature flue gas and be back to reaction tower top in a large number, cause the loss of reaction tower top too fast; More advantageously, the rotary motion of rotary wind screen also drives the motion of outer ring concentrate particle, crossing of two strands of air-flows forms violent turbulent flow, concentrate particle movement locus is in space made to become disorderly and unsystematic, facilitate the interparticle collision of concentrate, for the interparticle mass-and heat-transfer of concentrate provides dynamic conditions.
For realizing above-mentioned technique object, present invention also offers one and revolving floating melting nozzle in the same way, described to revolve floating melting nozzle be in the same way be set in together columnar structured, comprising: be positioned at the tubulose auxiliary burning nozzle on central axis; Be sleeved on the tubular cyclone of auxiliary burning nozzle outside; Guide vane between cyclone and burner; Be sleeved on the material pipe of cyclone outside; Be sleeved on the airduct of material pipe outside; Airduct is provided with tangent air inlet, and tangent air inlet is identical with the guiding direction of rotation of guide vane;
Wherein: between the outer tube wall of burner and the inner tubal wall of cyclone, form eddy flow passage; Form bottom convergent and lead between the outer tube wall of cyclone and the inner tubal wall of material pipe and be partial to the material chamber of central axis; Whirl deposite tank chamber is formed between the outer tube wall of material pipe and the inwall of airduct.
Preferably, the pelvic outlet plane of described burner is in the pelvic outlet plane of cyclone, and the pelvic outlet plane of described cyclone surpasses discharge nozzle pelvic outlet plane, and exceeding height h1 is 30mm ~ 100mm.
Preferably, the outlet inside wall of described material pipe is the bluff body to central axial direction convergent.
Preferably, the control valve for distributing oxygen-containing gas flow proportional is also comprised;
The import in eddy flow passage and Whirl deposite tank chamber is all by the source of the gas of pipeline communication in oxygen-containing gas, and control valve is arranged on pipeline.
Present invention also offers a kind of metallurgical equipment, comprise reaction tower and revolve floating melting nozzle, described in revolve floating melting nozzle be above-mentioned revolve floating melting nozzle in the same way.
Profitable fruit of the present invention:
One is that coefficient of oxygen utilization is high, and material and oxygen react completely;
Two is that concentrate interparticle collision probability is high, and be beneficial to reacted sedimentation, flue dust incidence is low;
Three is that production capacity is large, and can adapt to the needs of inventory wide fluctuations, energy consumption is low, small investment;
Four is backflow phenomenons of a large amount of high-temperature flue gas of finning and outer ring overcoming eddy flow, and required reaction compartment is little, reactionless dead band, little to washing away of fire resisting material of furnace body;
Five be structure simple, control, operation, easy to maintenance, reliable, make full use of the potential energy of fluid, operating cost is low.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The process program that Fig. 1 provides for the embodiment of the present invention and metallurgical equipment structural representation;
The schematic top plan view of the metallurgical equipment that Fig. 2 provides for the embodiment of the present invention.
Wherein, 1 is burner; 2 is cyclone, and 21 is the first air inlet; 3 is material pipe, and 31 is the second charging aperture, and 32 is bluff body; 4 is airduct, and 41 is tangent air inlet; 5 is guide vane; 6 is control valve; 7 is oxygen-containing gas, and 71 is the first oxygen-containing gas, and 72 is the second oxygen-containing gas, and 73 is rotating jet, and 74 is air curtain; 8 is Whirl deposite tank chamber; 9 is material chamber; 10 is eddy flow passage; 11 is concentrate; 12 is two-phase rotating jet; 13 is reaction tower.
Detailed description of the invention
The invention discloses a kind of newly revolve floating method of smelting in the same way, to improve coefficient of oxygen utilization, material and oxygen are reacted completely; Overcome the backflow phenomenon of a large amount of high-temperature flue gas of finning and outer ring of eddy flow, required reaction compartment is little, reactionless dead band, little to washing away of fire resisting material of furnace body.The invention provides a kind of realize said method revolve floating melting nozzle in the same way, and a kind of metallurgical equipment applying said nozzle.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1 and Fig. 2, the process program that Fig. 1 provides for the embodiment of the present invention and metallurgical equipment structural representation; The schematic top plan view of the metallurgical equipment that Fig. 2 provides for the embodiment of the present invention.
What the embodiment of the present invention provided revolves floating method of smelting in the same way, its core improvement is: be ejected in the space in the reaction tower 13 of high temperature by the powdery vulcanised ore concentrate 11 of drying and the oxygen-containing gas 7 of corresponding amount, the arrangement of features in " wind ~ ore deposit ~ wind " on horizontal plane; Wherein:
Oxygen-containing gas 7 comprises the first oxygen-containing gas 71 and the second oxygen-containing gas 72: wherein, the mode that second oxygen-containing gas 72 rotates with ring-type sprays in reaction tower 13, and mainly forms the rotary wind screen 74 of horizontal flaring, the vertical bell shape extended by high temperature and the effect of self rotary expansion in reaction tower 13; First oxygen-containing gas 71 is converted into the center that rotating jet 73 is injected into rotary wind screen 74 straight down, and rotary wind screen 74 is identical with the direction of rotation of rotating jet 73;
To enter in the annulus between rotating jet 73 and rotary wind screen 74 two strands of air-flows from top to bottom with the direction of being partial to central axis through the dry vulcanised ore concentrate 11 of measure control;
At the center of air curtain 74, the rotating jet 73 of High Rotation Speed is involved in vulcanised ore concentrate 11 and the high temperature gas flow from reaction tower 13 bottom to the extension movement of surrounding simultaneously, form horizontal direction rotary expansion, gas grain two-phase rotating jet 12 straight down, its direction of rotation is identical with rotary wind screen 74, and its structure can with reference to shown in Fig. 1; Rotate stronger two-phase rotating jet 12 outwards further expansion rotated more weak rotary wind screen 74 and limited, to stop the generation of finning, compensate the oxygen gesture of two-phase rotating jet 12 outer ring simultaneously;
In the process of motion, vulcanised ore concentrate 11 is lighted by the high temperature of radiation in high-temperature flue gas and reaction tower 13, violent combustion reaction occurs and discharges to be rich in SO with oxygen
2flue gas, simultaneous reactions generates the molten mixture containing sulfonium (or metal) and slag, and finally in the bottom of reaction tower 13, sulfonium (or metal) is separated with slag, completes metallurgical process.
As can be seen from above-mentioned technical scheme, what the embodiment of the present invention provided revolves floating method of smelting in the same way, vulcanised ore concentrate 11 is arranged on the centre of two-layer reaction oxygen-containing gas, in the middle of utilizing, the oxygen-containing gas (i.e. rotating jet 73) of High Rotation Speed is to surrounding extension movement, be involved in vulcanised ore concentrate 11 and the high temperature gas flow from reaction tower 13 bottom simultaneously, form horizontal direction rotary expansion, gas grain two-phase rotating jet 12 vertically downward.When gas grain two-phase rotating jet 12 expands outwardly the inwall curtain wall arriving rotary wind screen 74, be subject to the control that air curtain 74 holds together to gather effect, stop its chaotic expansive outside further, to eliminate finning; Rotating Vortex air curtain 74 the outer ring of gas grain two-phase rotating jet 12 uninterruptedly to its supplement outside needed for entrainment air quantity, with the oxygen gesture of complemental air grain two-phase rotating jet 12 outer ring, simultaneously, because the spin intensity of rotary wind screen 74 is more weak, avoid reacted high-temperature flue gas to be back to reaction tower 13 in a large number and to push up, cause reaction tower 13 to push up loss too fast; More advantageously, the rotary motion of rotary wind screen 74 also drives the motion of outer ring concentrate 11 particle, crossing of two strands of air-flows forms violent turbulent flow, concentrate 11 particle movement locus is in space made to become disorderly and unsystematic, facilitate the interparticle collision of concentrate 11, for the interparticle mass-and heat-transfer of concentrate 11 provides dynamic conditions.
The characteristic of oxygen-containing gas 7 can be required to determine according to actual process by those skilled in the art.In the specific embodiment that this programme provides, the first oxygen-containing gas 71 and the second oxygen-containing gas 72 are same reacting gas, have identical pressure, temperature and oxygen content, and its oxygen content is 25% ~ 95% (wt) of gross weight.So, the first oxygen-containing gas 71 and the second oxygen-containing gas 72 just can be provided by same source of the gas, and the structure being conducive to metallurgical equipment simplifies.
In order to optimize above-mentioned technical scheme further, in first oxygen-containing gas 71 and the second oxygen-containing gas 72, institute is oxygen containing and be that vulcanised ore concentrate 11 reacts required total amount, and allocation proportion is 20% ~ 80% (volume ratio), its concrete method of salary distribution is determined according to actual conditions, in this no limit.
As preferably, the first oxygen-containing gas 71 is through the guide vane 5 axially installed and converts rotating jet 73 to, and its swirl strength >=0.5; Second oxygen-containing gas 72 is by tangent air inlet 41 one-tenth rotary wind screen 74, swirl strength≤0.3, better revolves floating melting reaction effect to reach.
In the specific embodiment that this programme provides, dry powdery vulcanised ore concentrate 11 refers to the sorting mined material containing metal sulfides such as Cu, Ni, Pb and/or Zn.
For realizing above-mentioned technique object, the embodiment of the present invention additionally provides one and revolves floating melting nozzle in the same way, for being installed in the hole at rewinding shaped reaction tower 13 top straight down, its core improvement is: described to revolve floating melting nozzle be in the same way be set in together columnar structured, comprise: from inside to outside, be positioned at the tubulose auxiliary burning nozzle 1 on central axis; Be sleeved on the tubular cyclone 2 of auxiliary burning nozzle 1 outside; The guide vane 5 installed vertically between cyclone 2 and burner 1; Be sleeved on the material pipe 3 of cyclone 2 outside; Be sleeved on the airduct 4 of material pipe 3 outside; Airduct 4 is provided with tangent air inlet 41, and tangent air inlet 41 is identical with the guiding direction of rotation of guide vane 5; By the upper installation tangent air inlet 41 at airduct 4 to produce more weak eddy flow (i.e. rotary wind screen 74), pass through guide vane 5 to produce stronger eddy flow (i.e. rotating jet 73) simultaneously;
Wherein: between the outer tube wall of burner 1 and the inner tubal wall of cyclone 2, form eddy flow path 10; Form bottom convergent and lead between the outer tube wall of cyclone 2 and the inner tubal wall of material pipe 3 and be partial to the material chamber 9 of central axis; Whirl deposite tank chamber 8 is formed between the outer tube wall of material pipe 3 and the inwall of airduct 4.
As preferably, number of guide vanes 5 is arranged on the outer wall of burner 1 vertically, and is positioned at the mid portion of cyclone 2 length, to obtain the rotating jet 73 being suitable for revolving floating melting reaction.
In order to optimize above-mentioned technical scheme further, the pelvic outlet plane of burner 1 in the pelvic outlet plane of cyclone 2, as shown in Figure 1, in the vertical direction, the outlet bottom burner 1 is higher than the outlet of cyclone 2; The pelvic outlet plane of cyclone 2 surpasses discharge nozzle 3 pelvic outlet plane, and exceeding height h1 is 30mm ~ 100mm, i.e. in the vertical direction, and the outlet bottom cyclone 2 will lower than the outlet 30mm ~ 100mm of material pipe 3; Material pipe 3 can be concordant with the outlet at bottom of airduct 4.By above structural design, optimize mode and opportunity that reaction mass enters reaction tower 13, thus better can be revolved floating melting reaction effect.
In the specific embodiment that this programme provides, the outlet inside wall of material pipe 3 is annular configuration bluff bodies 32 to central axial direction convergent, the outer tube of cyclone 2 is pipes isometrical up and down, and its structure with reference to shown in Fig. 1, thus can play deceleration and guide effect to concentrate 11.
What the embodiment of the present invention provided revolves floating melting nozzle in the same way, also comprises the control valve 6 for distributing oxygen-containing gas 7 flow proportional;
The import in eddy flow path 10 and Whirl deposite tank chamber 8 is all by the source of the gas of pipeline communication in oxygen-containing gas 7, and control valve 6 is arranged on pipeline.The quantity of control valve 6 can be one or two; When employing one, arbitrary lateral is installed can both adjust flux ratio; In the specific embodiment that this programme provides, be have employed two control valves 6, be arranged on respectively on the air inlet lateral of the first oxygen-containing gas 71 and the second oxygen-containing gas 72, its structure can with reference to shown in Fig. 1.
Can be 1,2 or 3 etc. for connecting the quantity of the first air inlet 21 of source outlet and the import of eddy flow path 10, being installed on the top of cyclone 2; As preferably, multiple the first above-mentioned air inlet 21 is uniformly distributed along cyclone 2 circumference, and airintake direction is perpendicular to the axis of cyclone 2.
Be connected to the even number that material chamber 9 import can be 2,4 or 6 etc. for the quantity of the second charging aperture 31 of inside filler, symmetry is installed on the top of material pipe 3.As preferably, the airintake direction of the second above-mentioned charging aperture 31 is the central axial direction of guiding material pipe 3.
For connecting the even number that the quantity of the tangent air inlet 41 of source outlet and Whirl deposite tank chamber 8 import can be 2,4 or 6 etc., symmetry is installed on the top of airduct 4.In the specific embodiment that this programme provides, the quantity of tangent air inlet 41 is two, and symmetry is arranged on the epimere of airduct 4, and its structure can with reference to shown in Fig. 2.
Below in conjunction with specific works process, the nozzle that this programme provides is described further:
As shown in Figure 1, after inventory is determined, the oxygen-containing gas 7 weighing rear dry powdery vulcanised ore concentrate 11 and corresponding amount is ejected in the space of reaction tower 13 of high temperature by the above-mentioned floating melting nozzle that revolves in the same way, the arrangement of features in the horizontal plane in " wind ~ ore deposit ~ wind ".Wherein:
Oxygen-containing gas 7 is by before Cemented filling access arrangement, pipeline is divided into two, corresponding oxygen-containing gas 7 is divided into first oxygen-containing gas 71 and second these two parts of oxygen-containing gas 72: wherein, and the mode that a part (i.e. the second oxygen-containing gas 72) rotates with ring-type through the weak cyclonic chamber (namely tangent air inlet 41 enters Whirl deposite tank chamber 8) of equipment sprays in reaction tower 13; Another part (i.e. the first oxygen-containing gas 71) through cyclone 2 eddy flow passage and diversed blade 5 is converted into the center that rotating jet 73 is injected into rotary wind screen 74.
Through the dry vulcanised ore concentrate 11 of measure control by the free vertical drop in material chamber, circular passage 9 of nozzle, in the exit in material chamber, circular passage 9, be subject to deceleration and the guide effect of the bluff body 32 that annular configuration tilts to axis, enter with the direction of being partial to axis in the annulus of two strands of air-flows.
Leaving after nozzle enters reaction tower 13, the ring-type eddy flow (i.e. the second oxygen-containing gas 72) of outer ring, mainly by the effect of reaction tower 13 high temperature with self rotary expansion, forms horizontal flaring, vertically extending bell shape rotary wind screen 74 in the space of reaction tower 13; At the center of air curtain 74, the oxygen-containing gas (i.e. rotating jet 73) of High Rotation Speed is involved in vulcanised ore concentrate 11 and the high temperature gas flow from reaction tower 13 bottom to the extension movement of surrounding simultaneously, forms horizontal direction rotary expansion, gas grain two-phase rotating jet 12 vertically downward.The outside further expansion of the gas grain two-phase rotating jet 12 that central rotation is stronger is rotated more weak rotary wind screen 74 by outer ring and limits, and to stop the generation of finning, compensates the oxygen gesture of outer ring concentrate 11 particle periphery simultaneously.
When stronger gas grain two-phase rotating jet 12 expands outwardly the inwall curtain wall arriving rotary wind screen 74, be subject to the control that rotary wind screen 74 holds together to gather effect, stop its chaotic expansive outside further, to eliminate finning; Rotary wind screen 74 the outer ring of gas grain two-phase rotating jet 12 uninterruptedly to its supplement outside needed for entrainment air quantity, with the oxygen gesture of complemental air grain two-phase rotating jet 12 outer ring, simultaneously, because the spin intensity of rotary wind screen 74 is more weak, the amount of entrainmenting of its outer ring is less, avoid reacted high-temperature flue gas and be back to reaction tower top in a large number, cause the loss of reaction tower top too fast; More advantageously, the rotary motion of rotary wind screen 74 also drives the motion of outer ring concentrate 11 particle, crossing of two strands of air-flows forms violent turbulent flow, concentrate 11 particle movement locus is in space made to become disorderly and unsystematic, facilitate the interparticle collision of concentrate 11, for the interparticle mass-and heat-transfer of concentrate 11 provides dynamic conditions.
In the process of motion, vulcanised ore concentrate 11 is lighted by the high temperature of radiation in high-temperature flue gas and reaction tower 13, violent combustion reaction occurs and discharges to be rich in SO with oxygen
2flue gas, simultaneous reactions generates the mixed melting thing containing sulfonium (or metal) and slag, and finally in the bottom of reaction tower 13, sulfonium (or metal) is separated with slag, completes metallurgical process.
The embodiment of the present invention additionally provides a kind of metallurgical equipment, comprise reaction tower 13 and revolve floating melting nozzle in the same way, its core improvement is: revolving floating melting nozzle is in the same way above-mentioned revolve floating melting nozzle in the same way, is installed on straight down in the hole at rewinding shaped reaction tower 13 top.
In sum, embodiments provide a kind of method of revolving floating melting vulcanised ore concentrate powder in the same way, the powdery vulcanised ore concentrate 11 of drying and the oxygen-containing gas 7 of corresponding amount are ejected in the space of reaction tower 13 of high temperature by equipment.Oxygen-containing gas 7 is divided into first oxygen-containing gas 71 and second oxygen-containing gas 72 two parts before entering the device: the second oxygen-containing gas 72 sprays into the rotary wind screen 74 forming bell shape in reaction tower 13 in the mode of ring-type eddy flow; First oxygen-containing gas 71 is converted into rotating jet 73 through equipment, injecting of the center of rotary wind screen 74.In the annulus in the middle of two strands of air-flows, concentrate 11 enters with the direction at be partial to center, is involved in and aspirate the two-phase rotating jet 12 that the high-temperature flue gas formation gas grain from reaction tower 13 bottom mixes by rotating jet 73.When vulcanised ore concentrate 11 is lighted by high temperature, namely there is violent combustion reaction with oxygen and discharge to be rich in SO
2flue gas, form the mixed melting thing containing sulfonium (or metal) and slag, finally in the bottom of reaction tower 13, sulfonium (or metal) has been separated metallurgical process with slag simultaneously.For realizing process goal, present invention also offers a kind of metallurgical equipment and revolving floating melting nozzle in the same way.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. one kind revolves floating method of smelting in the same way, it is characterized in that: the powdery vulcanised ore concentrate (11) of drying and the oxygen-containing gas (7) of corresponding amount are ejected in the space of reaction tower (13) of high temperature, the arrangement of features in " wind ~ ore deposit ~ wind " on horizontal plane; Wherein:
Oxygen-containing gas (7) comprises the first oxygen-containing gas (71) and the second oxygen-containing gas (72): the second oxygen-containing gas (72) sprays in reaction tower (13) in the mode that ring-type rotates, and forms horizontal flaring, the vertical bell shape rotary wind screen (74) extended by the effect of high temperature and self rotary expansion in reaction tower (13); First oxygen-containing gas (71) is converted into the center that rotating jet (73) is injected into rotary wind screen (74), and rotary wind screen (74) is identical with the direction of rotation of rotating jet (73);
To enter in the annulus between rotating jet (73) and rotary wind screen (74) two strands of air-flows with the direction of being partial to central axis through the dry vulcanised ore concentrate (11) of measure control;
At the center of air curtain (74), the rotating jet (73) of High Rotation Speed is involved in vulcanised ore concentrate (11) and the high temperature gas flow from reaction tower (13) bottom to the extension movement of surrounding simultaneously, forms horizontal direction rotary expansion, gas grain two-phase rotating jet (12) straight down; Rotate the outside further expansion of stronger two-phase rotating jet (12) and rotated more weak rotary wind screen (74) restriction, to stop the generation of finning, compensate the oxygen gesture of two-phase rotating jet (12) outer ring simultaneously;
In the process of motion, vulcanised ore concentrate (11) is lighted by the high temperature of high-temperature flue gas and reaction tower (13) interior radiation, violent combustion reaction occurs and discharges to be rich in SO with oxygen
2flue gas, simultaneous reactions generates the mixed melting thing containing sulfonium (or metal) and slag, and finally in the bottom of reaction tower (13), sulfonium (or metal) is separated with slag, completes metallurgical process.
2. according to claim 1ly revolve floating method of smelting in the same way, it is characterized in that: described the first oxygen-containing gas (71) and the second oxygen-containing gas (72) are same reacting gas, have identical pressure, temperature and oxygen content, its oxygen content is 25% ~ 95% (wt).
3. according to claim 1ly revolve floating method of smelting in the same way, it is characterized in that: in described the first oxygen-containing gas (71) and the second oxygen-containing gas (72), institute is oxygen containing and be the required total amount of vulcanised ore concentrate (11) reaction, and allocation proportion is 20% ~ 80% (volume ratio).
4. according to claim 1ly revolve floating method of smelting in the same way, it is characterized in that: swirl strength >=0.5 of described rotating jet (73); Swirl strength≤0.3 of described rotary wind screen (74).
5. according to claim 1ly revolve floating method of smelting in the same way, it is characterized in that: described dry powdery vulcanised ore concentrate (11) refers to the sorting mined material containing Cu, Ni, Pb and/or Zn metal sulfide.
6. revolve a floating melting nozzle in the same way, it is characterized in that: described to revolve floating melting nozzle be in the same way be set in together columnar structured, comprising: be positioned at the tubulose auxiliary burning nozzle (1) on central axis; Be sleeved on the tubular cyclone (2) that auxiliary burning nozzle (1) is outside; Be positioned at the guide vane (5) between cyclone (2) and burner (1); Be sleeved on the material pipe (3) that cyclone (2) is outside; Be sleeved on the airduct (4) that material pipe (3) is outside; Airduct (4) is provided with tangent air inlet (41), and tangent air inlet (41) is identical with the guiding direction of rotation of guide vane (5); Wherein: between the outer tube wall of burner (1) and the inner tubal wall of cyclone (2), form eddy flow passage (10); Convergent bottom being formed between the inner tubal wall that the outer tube wall of cyclone (2) and material manages (3) and lead and be partial to the material chamber (9) of central axis; Whirl deposite tank chamber (8) is formed between the outer tube wall of material pipe (3) and the inwall of airduct (4).
7. according to claim 6ly revolve floating melting nozzle in the same way, it is characterized in that: the pelvic outlet plane of described burner (1) is in the pelvic outlet plane of cyclone (2), the pelvic outlet plane of described cyclone (2) surpasses discharge nozzle (3) pelvic outlet plane, and exceeding height h1 is 30mm ~ 100mm.
8. according to claim 6ly revolve floating melting nozzle in the same way, it is characterized in that: the outlet inside wall of described material pipe (3) is the bluff body (32) to central axial direction convergent.
9. according to claim 6ly revolving floating melting nozzle in the same way, it is characterized in that: also comprise the control valve (6) for distributing oxygen-containing gas (7) flow proportional;
The import of eddy flow passage (10) and Whirl deposite tank chamber (8) is all by the source of the gas of pipeline communication in oxygen-containing gas (7), and control valve (6) is arranged on pipeline.
10. a metallurgical equipment, comprises reaction tower (13) and revolves floating melting nozzle, it is characterized in that: described in revolve floating melting nozzle for revolving floating melting nozzle in the same way as described in claim 6-9 any one.
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| EP3889275B1 (en) * | 2020-03-31 | 2023-11-22 | Qiu, Jiangbo | Skyflash multiphase flow metallurgical furnace |
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