CN102564130B - Continuous temperature control smelting system integrating rotary kiln with melting furnace - Google Patents
Continuous temperature control smelting system integrating rotary kiln with melting furnace Download PDFInfo
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- CN102564130B CN102564130B CN201210025393.2A CN201210025393A CN102564130B CN 102564130 B CN102564130 B CN 102564130B CN 201210025393 A CN201210025393 A CN 201210025393A CN 102564130 B CN102564130 B CN 102564130B
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Abstract
A continuous temperature control smelting system integrating a rotary kiln with a melting furnace comprises the rotary kiln and the melting furnace. The rotary kiln comprises a discharging port and an air inlet, the melting furnace comprises a feeding port and an air outlet. The discharging port and the air inlet of the rotary kiln are hermetically communicated with the feeding port and the air outlet of the melting furnace. A cooling water sleeve is arranged between a rotary kiln cylinder and a refractory layer, an air delivery device is arranged between a kiln head and a kiln tail, and a first cooling water sleeve, a second cooling water sleeve and a third cooling water sleeve are arranged among a melting furnace head, a furnace tail, two lateral furnace walls and refractory materials. The continuous temperature control smelting system has the advantages that the cooling water sleeve is used for cooling the refractory-layer rotary kiln cylinder, and especially cooling the kiln head to protect the kiln head from corrosion, and the service life of the rotary kiln cylinder can be prolonged; heat can be recycled; materials are blown up and blown away by the air delivery device to enable reaction and reduction to be more complete; reduction efficiency is improved; efficient melting of bauxite at a low temperature can be realized while the problem that needlelike bauxite cannot be melted is solved; and the rotary kiln and the melting furnace are serially connected for use, continuous reduction, melting and heat recovery can be realized, and favorable conditions can be provided for high value-added utilization of slag.
Description
Technical field
The invention belongs to metallurgical technology field, be specifically related to a kind of smelting system of rotary kiln melting furnace of continuous temperature control.
Background technology
In the production of metallurgy industry, chemical industry inorganic salts industry, cement building material industry, all can use rotary kiln.In smelting process, because the temperature in cylinder of rotary kiln is even higher up to thousands of degree, and production process need to keep continuous state, although so be provided with flame retardant coating on cylinder of rotary kiln inwall, but under the effects such as the thermal etching that high-temperature material in cylinder of rotary kiln is lasting and acid and alkali corrosion, still can make flame retardant coating and cylinder of rotary kiln constantly be encroached on and cause it to damage, using certain hour to need correspondingly to change afterwards.Meanwhile, cause a large amount of hot loss of energies.Especially the drain hole place of rotary kiln end, because directly suffering thermal etching and the acid and alkali corrosion of high-temperature material, is affected production therefore often can damage.Like this, carry out the replacing of flame retardant coating, not only will delay the duration, affect production efficiency, and increase huge production cost; Furthermore, if cylinder of rotary kiln sustain damage, that just will further strengthen production cost, reduce operating efficiency.And a large amount of heat-energy losses cause energy waste.
Bauxite extracts in the process of aluminium oxide, produces a large amount of red muds; In lateritic nickel ore wet method leaching process, produced a large amount of acid sludges, caused the pollution of environment and the waste of resource.In bauxite alkali sintering process, because high temperature reduction has caused alkali evaporation, reaction can not be gone on, thereby caused leaching rate of alumina reduction; Use kiln process while carrying out iron oxide reduction, because low temperature just causes the percent reduction deficiency of iron oxide.In existing metallurgical technology, need to use rotary kiln, electric furnace or molten point stove.Use separately rotary kiln, although can realize continuous charging and discharging, cannot realize continuous reduction, molten dividing, heat integration; And electric furnace, a molten point of stove are all intermittently charging and discharging, thereby can not realize continuously reduction, molten dividing, heat integration.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, the smelting system of the rotary kiln melting furnace of continuous temperature control is provided.It can effectively reduce the temperature of cylinder of rotary kiln and flame retardant coating, extends its service life, thereby has reduced production cost; Realize low-temperature reduction, improve aluminium oxide yield and iron oxide reduction rate; Rotary kiln, molten point of stove series connection are used, and have realized continuous charging and discharging, and realize the comprehensive utilization of reduction continuously, molten point and heat energy.
The technical solution adopted for the present invention to solve the technical problems is: the smelting system of the rotary kiln melting furnace of continuous temperature control, comprise rotary kiln, molten point stove, described rotary kiln comprises drain hole, air intake, a described molten point stove comprises feeding mouth, exhaust outlet, it is characterized in that: the drain hole of described rotary kiln, air intake and molten airtight the communicating of feeding mouth, exhaust outlet of dividing stove.
Preferably, described rotary kiln also comprises cylinder of rotary kiln, kiln hood and kiln tail, in described cylinder of rotary kiln, be provided with flame retardant coating, it is characterized in that: between described cylinder of rotary kiln and described flame retardant coating, a cooling jacket is set, described cooling jacket includes water pipe, enters supply mains, outlet pipe, outfall sewer and main cavity, the water inlet end of described oral siphon is communicated with in the centre of kiln tail with the delivery port that enters supply mains, and the water side of oral siphon is communicated with described main cavity; The described supply mains's of entering water inlet connects a swivel joint;
The water inlet end of described outlet pipe is arranged in described main cavity, and its water side is communicated with in the centre of kiln hood with one end of described outfall sewer; The other end of described outfall sewer passes to kiln hood, and connects a swivel joint;
Preferably, described rotary kiln also comprises an air delivery device, described air delivery device comprises that a gas transmission main, a gas transmission are in charge of, the shower nozzle of giving vent to anger, and described gas transmission main one end is in charge of and is communicated with described gas transmission in the centre of described kiln hood, and the other end connects a gas distribution plate; Described gas transmission is in charge of and is arranged in described flame retardant coating inside, with the described shower nozzle UNICOM of giving vent to anger.
Preferably, a described molten point stove also comprises discharging opening, slag notch, in described molten point stove furnace wall, be provided with refractory material, it is characterized in that: between the furnace wall at the burner place of described molten point of stove and described refractory material, be provided with the first cooling jacket, described the first cooling jacket comprises the first water inlet pipe and the first outlet pipe.
Preferably, in the cavity of described molten point stove, an ion torch is set.
Preferably, described ion torch is penetrated in cavity by the furnace roof of described molten point stove, and is arranged at described slag notch top.
Preferably, the burner place of described molten point stove is provided with gas gun.
Preferably, the stove tail place of described molten point stove is provided with gas gun.
Preferably, between the two side of described molten point of stove and described refractory material, be provided with the second cooling jacket, described the second cooling jacket comprises the second water inlet pipe and the second outlet pipe.
Preferably, between the furnace wall at the stove tail place of described molten point of stove and described refractory material, be provided with the 3rd cooling jacket, described the 3rd cooling jacket comprises the 3rd water inlet pipe and the 3rd outlet pipe.
Preferably, described the first cooling jacket is more than one; Described the second cooling jacket is more than two; Described the 3rd cooling jacket is more than one.
Preferably, the height of the molten point furnace hearth wall of described slag notch distance is greater than the height of the molten point furnace hearth wall of described discharging opening distance.
Preferably, 0.1～1 meter of the described slag notch of described ion torch distance.
Compared with prior art, the invention has the beneficial effects as follows: owing to having set up cooling jacket between cylinder of rotary kiln and flame retardant coating, both flame retardant coating was lowered the temperature, reduce it and change number of times, reduced cost, make again cylinder of rotary kiln especially kiln hood avoid corrode, extended its service life; The drain hole place of rotary kiln has set up prickle and has added and cover flame retardant coating, has effectively prevented the destruction of high-temperature material to kiln hood; Cooling jacket has absorbed a large amount of heat energy, has effectively improved heat utilization rate; At material during in cylinder of rotary kiln bottom, the air delivery device of setting up is in charge of added hydrogen through gas distribution plate, gas transmission main, gas transmission, from the shower nozzle of giving vent to anger, spray, and the hydrogen of ejection can blow afloat material, dispel, material gas-solid reaction can normally be carried out, reduce more abundant; And hydrogen has improved reduction efficiency, shortened the reaction time; Realized bauxite low-temperature, melted out expeditiously, effectively solved the difficult problem that in prior art, Bayer process, sintering process etc. all cannot melt out is used in needle-like ferro-aluminum ore deposit; Under the condition existing at sodium, the speed of hydrogen reducing iron oxide is accelerated, thereby realizes low-temperature reduction, and percent reduction is higher than other reducing agent; Effectively avoided alkali evaporation, reaction is normally carried out, improved the yield of aluminium oxide, improved the percent reduction of iron oxide simultaneously, reduced the discharge of carbon dioxide simultaneously simultaneously.Rotary kiln, molten point of stove series connection are used, realized continuous charging and discharging, and realize the comprehensive utilization of continuously reduction, molten point and heat energy, for the high value added utilization of slag provides good condition, as the production of float glass process artificial marble, microlite and foaming thermal-insulating.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the cutaway view of the rotary furnace in the embodiment of the present invention;
Fig. 3 is the front view of the molten point stove in the embodiment of the present invention;
Fig. 4 is the top view of Fig. 3;
Fig. 5 is the left view of Fig. 3.
In figure, be labeled as:
1, rotary kiln; 11, cylinder of rotary kiln; 12, kiln hood; 13, kiln tail; 14, flame retardant coating; 151, oral siphon; 152, outlet pipe; 153, main cavity; 154, enter supply mains; 155, outfall sewer; 16, swivel joint; 171, gas transmission main; 172, gas transmission is in charge of; 173, the shower nozzle of giving vent to anger; 18, gas distribution plate; 19, prickle; 130, drain hole; 131, air intake; 2, molten point stove; 21, discharging opening; 22, slag notch; 23, feeding mouth; 24, exhaust outlet; 25, the first cooling jacket; 251, the first water inlet pipe; 252, the first outlet pipe; 26, the second cooling jacket; 261, the second water inlet pipe 262, the second outlet pipe; 27, the 3rd cooling jacket; 271, the 3rd water inlet pipe; 272, the 3rd outlet pipe; 28, ion torch; 29, gas gun; 30, refractory material.
The specific embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described further:
As shown in Fig. 1 to 5, a kind of smelting system of rotary kiln melting furnace of continuous temperature control, comprise rotary kiln 1, molten point stove 2, described rotary kiln 1 comprises drain hole 130, air intake 131, a described molten point of stove 2 comprises feeding mouth 23, exhaust outlet 24, the drain hole 130 of described rotary kiln 1, air intake 131 with the molten feeding mouth 23 that divides stove 2, exhaust outlet 24 is airtight communicates; Referring to Fig. 1,2.
Described rotary kiln 1 also comprises cylinder of rotary kiln 11, kiln hood 12 and kiln tail 13, in described cylinder of rotary kiln 11, be provided with flame retardant coating 14, between described cylinder of rotary kiln 11 and described flame retardant coating 14, cooling jacket is set, described cooling jacket includes water pipe 151, outlet pipe 152, main cavity 153, enters supply mains 154, outfall sewer 155, the water inlet end of oral siphon 151 is connected with the delivery port that enters supply mains 154, and its water side is communicated with described main cavity 153; The water inlet end of described outlet pipe 152 is arranged in described main cavity 153, and its water side is communicated with outfall sewer 154; Referring to Fig. 1,2.
One end of outfall sewer 155 is in kiln hood 12 places, centre and described outlet pipe 152 UNICOMs, and the other end passes to kiln hood 12, and connects swivel joint 16; The water inlet of described oral siphon 151 connects another swivel joint 16, and the delivery port of described oral siphon 151 is arranged at the centre of kiln tail 13; Referring to Fig. 1,2.
Also comprise air delivery device, described air delivery device comprises that gas transmission main 171, gas transmission are in charge of 172, the shower nozzle 173 of giving vent to anger, and described gas transmission main 171 is arranged at described kiln hood 12, is in charge of 172 is communicated with described gas transmission; It is more than one that described gas transmission is in charge of 172, is arranged in described flame retardant coating 14 inside, with described shower nozzle 173 UNICOMs of giving vent to anger; Described gas transmission main 171 one end are in charge of 172 in the centre of described kiln hood 12 with described gas transmission and are communicated with, and the other end connects gas distribution plate 18; Referring to Fig. 1,2.
Referring to Fig. 3,4,5, described in give vent to anger shower nozzle 173 for Duckbill type, by ceramic material, its gas outlet, towards kiln hood 12, is arranged on and described kiln hood 12 10～50 meters of of distance; Described kiln hood 12 tops set firmly prickle 19, on described prickle 19, cover flame retardant coating 14;
Referring to Fig. 3,4,5, a described molten point stove 2 also comprises discharging opening 21, slag notch 22, in described molten point stove 2 furnace walls, be provided with refractory material 30, between the furnace wall at the burner place of described molten point of stove 2 and described refractory material 30, be provided with more than one the first cooling jacket 25, described the first cooling jacket 25 comprises the first water inlet pipe 251 and the first outlet pipe 252; Between the two side of described molten point of stove 2 and described refractory material 30, be provided with plural the second cooling jacket 26, described the second cooling jacket 26 comprises the second water inlet pipe 261 and the second outlet pipe 262; Between the furnace wall at the stove tail place of described molten point of stove 2 and described refractory material 30, be provided with more than one the 3rd cooling jacket 27, described the 3rd cooling jacket 27 comprises the 3rd water inlet pipe 271 and the 3rd outlet pipe 272.
Referring to Fig. 3,4,5, in the cavity of described molten point stove 2, an ion torch 28 is set; Described ion torch 28 is penetrated in cavity by the furnace roof of described molten point stove 2, and is arranged at described slag notch 22 tops; Burner, the stove tail place of described molten point stove 2 are provided with gas gun 29;
The height of molten point stove 2 diapires of described slag notch 22 distance is greater than the height of molten point stove 2 diapires of described discharging opening 21 distance; Described ion torch 28 is 0.1～1 meter with the distance of described slag notch 22.
Referring to Fig. 1,2, gas distribution plate 18 is by controller control, makes the shower nozzle 173 of giving vent to anger in " landfill " in material (i.e. those when cylinder of rotary kiln 11 bottom give vent to anger shower nozzle 173), just can ventilate and spray; Added hydrogen is in charge of 172 through gas distribution plate 18, gas transmission main 171, gas transmission, ejection from the shower nozzle 173 of giving vent to anger, and the hydrogen of ejection can blow afloat material, dispel.
The drain hole 130 of rotary kiln and molten airtight the communicating of feeding mouth 23 of dividing stove 2; The air intake 131 of rotary kiln and molten airtight the communicating of exhaust outlet 24 of dividing stove 2; The main cavity 153 of cooling jacket, just refers to the part cooling jacket between kiln hood 12, kiln tail 13.
Referring to Fig. 1,2,3,4,5, the drain hole 130 of rotary kiln 1 is preferably communicated with for same mouthful with air intake 131; The feeding mouth 23 of molten point stove 2 is preferably communicated with for same mouthful with exhaust outlet 24.
The above, be only preferred embodiment of the present invention, is not the restriction of the present invention being made to other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not depart from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (6)
1. the smelting system of the rotary kiln melting furnace of continuous temperature control, comprise rotary kiln, molten point stove, described rotary kiln comprises drain hole, air intake, a described molten point stove comprises feeding mouth, exhaust outlet, it is characterized in that: the drain hole of described rotary kiln, air intake and molten airtight the communicating of feeding mouth, exhaust outlet of dividing stove;
Described rotary kiln also comprises cylinder of rotary kiln, kiln hood and kiln tail, in described cylinder of rotary kiln, is provided with flame retardant coating; Between described cylinder of rotary kiln and described flame retardant coating, a cooling jacket is set, described cooling jacket includes water pipe, enters supply mains, outlet pipe, outfall sewer and main cavity, the water inlet end of described oral siphon is communicated with in the centre of kiln tail with the delivery port that enters supply mains, and the water side of oral siphon is communicated with described main cavity; The described supply mains's of entering water inlet connects a swivel joint; The water inlet end of described outlet pipe is arranged in described main cavity, and its water side is communicated with in the centre of kiln hood with one end of described outfall sewer; The other end of described outfall sewer passes to kiln hood, and connects a swivel joint;
A described molten point stove also comprises discharging opening, slag notch, in described molten point stove furnace wall, be provided with refractory material, between the furnace wall at the burner place of described molten point of stove and described refractory material, be provided with the first cooling jacket, described the first cooling jacket comprises the first water inlet pipe and the first outlet pipe; Between the two side of described molten point of stove and described refractory material, be provided with the second cooling jacket, described the second cooling jacket comprises the second water inlet pipe and the second outlet pipe; Between the furnace wall at the stove tail place of described molten point of stove and described refractory material, be provided with the 3rd cooling jacket, described the 3rd cooling jacket comprises the 3rd water inlet pipe and the 3rd outlet pipe; Described the first cooling jacket is more than one; Described the second cooling jacket is more than two; Described the 3rd cooling jacket is more than one;
In the cavity of described molten point stove, an ion torch is set;
Described rotary kiln also comprises an air delivery device, and described air delivery device comprises that a gas transmission main, a gas transmission are in charge of, the shower nozzle of giving vent to anger, and described gas transmission main one end is in charge of and is communicated with described gas transmission in the centre of described kiln hood, and the other end connects a gas distribution plate; Described gas transmission is in charge of and is arranged in described flame retardant coating inside, with the described shower nozzle UNICOM of giving vent to anger.
2. the smelting system of the rotary kiln melting furnace of continuous temperature control according to claim 1, is characterized in that: described ion torch is penetrated in cavity by the furnace roof of described molten point stove, and is arranged at described slag notch top.
3. the smelting system of the rotary kiln melting furnace of continuous temperature control according to claim 2, is characterized in that: the burner place of described molten point stove is provided with gas gun.
4. the smelting system of the rotary kiln melting furnace of continuous temperature control according to claim 3, is characterized in that: the stove tail place of described molten point stove is provided with gas gun.
5. the smelting system of the rotary kiln melting furnace of continuous temperature control according to claim 4, is characterized in that: the height of the molten point furnace hearth wall of described slag notch distance is greater than the height of the molten point furnace hearth wall of described discharging opening distance.
6. the smelting system of the rotary kiln melting furnace of continuous temperature control according to claim 5, is characterized in that: 0.1～1 meter of the described slag notch of described ion torch distance.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210025393.2A CN102564130B (en) | 2012-01-21 | 2012-01-21 | Continuous temperature control smelting system integrating rotary kiln with melting furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210025393.2A CN102564130B (en) | 2012-01-21 | 2012-01-21 | Continuous temperature control smelting system integrating rotary kiln with melting furnace |
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| CN102564130A CN102564130A (en) | 2012-07-11 |
| CN102564130B true CN102564130B (en) | 2014-05-07 |
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| CN104313230B (en) * | 2014-10-31 | 2017-06-20 | 江苏省冶金设计院有限公司 | Point stove and iron-smelting device and their reducing process are melted in combustion gas |
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| US4414026A (en) * | 1981-07-30 | 1983-11-08 | Nippon Kokan Kabushiki Kaisha | Method for the production of ferrochromium |
| US4701214A (en) * | 1986-04-30 | 1987-10-20 | Midrex International B.V. Rotterdam | Method of producing iron using rotary hearth and apparatus |
| JP2007291452A (en) * | 2006-04-25 | 2007-11-08 | Kobe Steel Ltd | Method for producing molten iron, and apparatus for producing molten iron |
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| CN102191348A (en) * | 2011-04-15 | 2011-09-21 | 董亚飞 | Technological method and device for producing high-grade nickel and stainless steel by using oxidized pellet method |
| CN202470757U (en) * | 2012-01-21 | 2012-10-03 | 胡长春 | Continuous temperature controlled smelting system with rotary kiln and melting furnace |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2924446Y (en) * | 2006-07-19 | 2007-07-18 | 程志强 | Buried rotary kiln radical air supply device |
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2012
- 2012-01-21 CN CN201210025393.2A patent/CN102564130B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3953007A (en) * | 1973-09-12 | 1976-04-27 | Hoogovens Ijmuiden B.V. | Wall construction of a shaft furnace |
| US4002465A (en) * | 1974-04-16 | 1977-01-11 | Ugo Brusa | Process for continuously heating and melting prereduced iron ores |
| US4414026A (en) * | 1981-07-30 | 1983-11-08 | Nippon Kokan Kabushiki Kaisha | Method for the production of ferrochromium |
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| US7993430B2 (en) * | 2006-04-25 | 2011-08-09 | Kobe Steel, Ltd. | Process for producing molten iron and apparatus for producing molten iron |
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