CN114111354A - Dry cooling device for zinc extraction rotary kiln iron slag and working method thereof - Google Patents
Dry cooling device for zinc extraction rotary kiln iron slag and working method thereof Download PDFInfo
- Publication number
- CN114111354A CN114111354A CN202111296662.4A CN202111296662A CN114111354A CN 114111354 A CN114111354 A CN 114111354A CN 202111296662 A CN202111296662 A CN 202111296662A CN 114111354 A CN114111354 A CN 114111354A
- Authority
- CN
- China
- Prior art keywords
- rotary kiln
- iron slag
- flue gas
- iron
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 306
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 153
- 239000002893 slag Substances 0.000 title claims abstract description 96
- 238000001816 cooling Methods 0.000 title claims abstract description 28
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 239000011701 zinc Substances 0.000 title claims abstract description 25
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 25
- 238000000605 extraction Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 20
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000003546 flue gas Substances 0.000 claims abstract description 59
- 238000001035 drying Methods 0.000 claims abstract description 47
- 239000000428 dust Substances 0.000 claims abstract description 18
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 14
- 230000023556 desulfurization Effects 0.000 claims abstract description 14
- 230000009467 reduction Effects 0.000 claims abstract description 14
- 238000003860 storage Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 37
- 238000012216 screening Methods 0.000 claims description 20
- 238000007599 discharging Methods 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 238000007790 scraping Methods 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000003009 desulfurizing effect Effects 0.000 claims description 5
- 238000005245 sintering Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- 238000010791 quenching Methods 0.000 abstract description 7
- 230000000171 quenching effect Effects 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000001465 metallisation Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
- F27D15/0206—Cooling with means to convey the charge
- F27D15/0213—Cooling with means to convey the charge comprising a cooling grate
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
- F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/04—Agitating, stirring, or scraping devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
- F27D15/0206—Cooling with means to convey the charge
- F27D15/028—Cooling with means to convey the charge comprising a rotary drum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a dry cooling device of zinc extraction rotary kiln iron slag and a working method thereof, which comprises a grate cooler and a rotary kiln drying furnace, wherein a box body is fixedly connected on the grate cooler, a storage bin and a reduction rotary kiln are respectively arranged on two sides of the top of the box body, a first flue gas pipeline and a second flue gas pipeline are respectively communicated on the box body and the rotary kiln drying furnace, the first flue gas pipeline and the second flue gas pipeline are connected on a dust removal and desulfurization system through a draught fan, the box body is arranged on the grate cooler, the storage bin and the reduction rotary kiln are respectively arranged on two sides of the top of the box body, the grate cooler is provided with a working surface for placing iron ore blocks and a high-temperature iron slag high-temperature wear-resistant layer, the invention can realize high-temperature iron slag, the heat utilization efficiency of the rest is more than 90 percent, compared with the traditional water quenching iron slag treatment, the field environment is improved, and the energy waste is reduced, the water resource is saved, the metallization rate of iron in the iron slag is improved, and the additional value of the iron slag is improved.
Description
Technical Field
The invention belongs to the field of waste treatment and utilization in the metallurgical industry, and particularly relates to a dry cooling device for iron slag of a zinc extraction rotary kiln and a working method thereof.
Background
The iron slag is a main solid waste generated by iron and steel enterprises, a high-temperature iron slag is generated in the process of treating dust removal ash in a rotary kiln to fuming and recover zinc, the slag discharging temperature is 900-1300 ℃, the heat of each ton of iron slag is about 50kg of heat of complete combustion of standard coal, the common way of treating iron slag to reduce the temperature is mainly through water quenching, a large amount of water mist is generated during water quenching, the extremely bad influence is caused on the field environment, meanwhile, the great waste of energy and the loss of water resources are caused, and the iron slag reduced by the original rotary kiln is further oxidized by water due to the influence of the iron slag water quenching, so that the metallization rate of iron in the iron slag is reduced; on the other hand, the water content of the iron ore lump ore used in blast furnace iron making is sometimes as high as more than 14%, and the iron ore lump ore needs to be dried for use.
Disclosure of Invention
The invention aims to provide a dry cooling device for iron slag of a zinc extraction rotary kiln and a working method thereof, and solves the problem of great energy waste in the prior art.
The purpose of the invention can be realized by the following technical scheme:
a dry cooling device for zinc extraction rotary kiln iron slag comprises a grate cooler, a rotary kiln drying furnace and a hot blast stove, wherein a box body is fixedly connected to the grate cooler, a bin and a reduction rotary kiln are respectively installed on two sides of the top of the box body, a first flue gas pipeline and a second flue gas pipeline are respectively communicated on the box body and the rotary kiln drying furnace, the first flue gas pipeline and the second flue gas pipeline are connected to a dust removal and desulfurization system through a draught fan, the box body is arranged on the grate cooler, the bin and the reduction rotary kiln are respectively installed on two sides of the top of the box body, a working face for placing iron ore blocks and a high-temperature iron slag high-temperature wear-resistant layer is arranged on the grate cooler, the bottom of the reduction rotary kiln is connected with a high-temperature iron slag chute, an iron slag discharging device is connected to the bottom of the high-temperature iron slag chute, air inlets of the first flue gas pipeline and the second flue gas pipeline are respectively communicated on the box body and the rotary kiln drying furnace, and the flue gas of first flue gas pipeline and second flue gas pipeline passes through the draught fan and carries dust removal desulfurization system, rotary kiln drying furnace bottom intercommunication has the unloading chute, and crushing and screening system and unloading chute intercommunication, the hot-blast furnace output end communicates with rotary kiln drying furnace end, for rotary kiln drying furnace provides the heat source, and the operating condition of hot-blast furnace is controlled by control system simultaneously.
Preferably, scum discharge device is including setting up at the inside row of box material shell and setting at the filter of arranging the material shell bottom, the push pedal that is used for driving the scum, install the driving motor on arranging the material shell, it is provided with the leading wheel to arrange the inside one side of material shell, driving motor's output is connected with the take-up pulley, and the take-up pulley surface winding has the steel wire, and the steel wire passes through the leading wheel and is connected with the push pedal.
Preferably, the control system comprises a control processor and a temperature detector which are installed on the box body, and the detection end of the temperature detector extends to the interior of the box body.
Preferably, one side inside the rotary kiln drying furnace is connected with a scraping plate in a sliding mode, one side of the scraping plate is connected with a pull rod, and one end of the pull rod extends to the outer side of the box body and is connected with a handle.
Preferably, the lower part of the grate cooler is provided with a water cooling device system used for cooling the grate cooler body, the grate cooler and the box body are both made of temperature-resistant materials, the working surface arranged on the grate cooler is made of high-temperature-resistant and wear-resistant materials, the thickness of the working surface is 8-20mm, the working surface runs linearly, and the running speed is 0.5-1.5 m/s.
Preferably, the induced air pressure is 5000-.
Preferably, the flue gas temperature of the hot blast stove is 800-1200 ℃;
the working method of the dry cooling device for the iron slag of the zinc extraction rotary kiln specifically comprises the following steps:
firstly, blanking iron ore blocks in a storage bin onto a working surface of the grate cooler to form an iron ore block layer, wherein the thickness of the iron ore block layer is 200-500 mm;
step two, the high-temperature iron slag reduced by the reduction rotary kiln falls to one side of the interior of the discharge shell through a high-temperature iron slag chute, then a driving motor is started, the driving motor drives a take-up pulley to rotate, so that a steel wire can be wound, the steel wire drives the high-temperature iron slag to uniformly pass through a filter plate, and a high-temperature iron slag layer is formed on the iron ore block ore layer, wherein the thickness of the high-temperature iron slag layer is 100-300 mm;
thirdly, conveying the iron ore lump ores and the high-temperature iron slag materials on the working surface to a rotary kiln drying furnace through a rotating device system of the grate cooler;
step four, the materials are fully mixed and subjected to heat exchange in a rotary kiln drying furnace, so that the moisture in the iron ore lump ore is dried, the temperature is also reduced at the moment, the temperature detector can detect the temperature in the box body at any time, when the insufficient heat in the rotary kiln drying furnace is detected, the hot blast stove can be started to work through the control processor, and the hot blast stove provides hot air with the temperature of 800-; after drying is finished, pulling the handle, driving the scraping plate to move by the handle through the pull rod, and driving the mixture to be discharged from the drying furnace of the rotary kiln and enter a crushing and screening system together by the scraping plate;
fifthly, screening iron-containing materials after the mixed materials of the iron ore lump ores and the iron slag enter a crushing and screening system, and using the iron-containing materials for blast furnace iron making and sintering;
and step six, the flue gas generated in the box body and the rotary kiln drying furnace respectively enters the dust removal and desulfurization system through the first flue gas pipeline and the second flue gas pipeline under the action of the draught fan, and the dust removal and desulfurization system removes dust and desulfurizes the flue gas and then discharges the flue gas after the flue gas reaches the standard.
The invention has the beneficial effects that:
according to the invention, the iron ore block ore layer and the high-temperature iron slag layer double-layer material layer are formed on the working surface through the blanking of the bin and the reduction rotary kiln, so that the utilization efficiency of the waste heat of the high-temperature iron slag can be controlled to be more than 90%, compared with the traditional water quenching treatment of the iron slag, the field environment is improved, the energy waste is reduced, the water resource is saved, the iron metallization rate in the iron slag is improved, and the additional value of the iron slag is improved.
According to the invention, the pull rod, the handle and the scraping plate are matched, so that the high-temperature iron slag can be uniformly discharged on the iron ore block ore bed to form the high-temperature iron slag layer, the high-temperature iron slag is not required to be paved by manual operation, and the labor is saved.
The comprehensive utilization device system has the advantages of simple process, low investment and operation cost, low accident rate, high heat efficiency and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a dry cooling device for iron slag of a zinc extraction rotary kiln.
Fig. 2 is a partial enlarged view of the invention at a in fig. 1.
FIG. 3 is a system schematic block diagram of a dry cooling device for iron slag of a zinc extraction rotary kiln and a working method thereof.
FIG. 4 is a system schematic block diagram of a control system in the working method of the dry cooling device for iron slag of the zinc extraction rotary kiln.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a grate cooler; 2. a storage bin; 3. reducing the rotary kiln; 4. a rotary kiln drying furnace; 5. a first flue gas duct; 6. a second flue gas duct; 7. an induced draft fan; 8. a dust removal and desulfurization system; 9. a crushing and screening system; 10. a hot blast stove; 11. a box body; 12. a working surface; 13. a high temperature iron slag chute; 14. a feeding chute; 15. a discharge shell; 16. a filter plate; 17. pushing the plate; 18. a drive motor; 19. a guide wheel; 20. a take-up pulley; 21. a steel wire; 22. a control processor; 23. a temperature detector; 24. a scraping plate; 25. a pull rod; 26. a handle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention relates to a dry cooling device for iron slag of a rotary kiln for zinc extraction and a working method thereof, which specifically includes the following embodiments:
example 1
A dry cooling device for zinc extraction rotary kiln iron slag comprises a grate cooler 1, a bin 2, a reduction rotary kiln 3, a rotary kiln drying furnace 4, a first flue gas pipeline 5, a second flue gas pipeline 6, an induced draft fan 7, a dust removal and desulfurization system 8, a crushing and screening system 9, a hot blast stove 10 and a box body 11, wherein the box body 11 is arranged on the grate cooler 1, the bin 2 and the reduction rotary kiln 3 are respectively arranged at two sides of the top of the box body 11, the grate cooler 1 is provided with a working surface 12 for placing iron ore blocks and a high-temperature iron slag high-temperature wear-resistant layer, the bottom of the reduction rotary kiln 3 is connected with a high-temperature iron slag chute 13, the bottom of the high-temperature iron slag chute 13 is connected with an iron slag discharge device, air inlets of the first flue gas pipeline 5 and the second flue gas pipeline 6 are respectively communicated with the box body 11 and the rotary kiln drying furnace 4, and the flue gas of the first flue gas pipeline 5 and the second flue gas pipeline 6 is conveyed to the dust removal and desulfurization system 8 through the induced draft fan 7, the bottom of the rotary kiln drying furnace 4 is communicated with a discharging chute 14, the crushing and screening system 9 is communicated with the discharging chute 14, the output end of the hot blast stove 10 is communicated with the end of the rotary kiln drying furnace 4 to provide a heat source for the rotary kiln drying furnace 4, and meanwhile, the working state of the hot blast stove 10 is controlled by the control system. The scum discharge device comprises a discharge shell 15 arranged inside the box body 11 and a filter plate 16 arranged at the bottom of the discharge shell 15, a push plate 17 used for driving scum, and a driving motor 18 installed on the discharge shell 15, wherein one side inside the discharge shell 15 is provided with a guide wheel 19, the output end of the driving motor 18 is connected with a take-up pulley 20, the surface of the take-up pulley 20 is wound with a steel wire 21, and the steel wire 21 is connected with the push plate 17 through the guide wheel 19. The control system includes a control processor 22 and a temperature detector 23 mounted on the housing 11, and a detection end of the temperature detector 23 extends to the interior of the housing 11. One side of the inside of the rotary kiln drying furnace 4 is connected with a scraping plate 24 in a sliding manner, one side of the scraping plate 24 is connected with a pull rod 25, and one end of the pull rod 25 extends to the outer side of the box body 11 and is connected with a handle 26. The lower part of the grate cooler 1 is provided with a water cooling device system for cooling the grate cooler 1 body, the grate cooler 1 and the box body 11 are both made of temperature-resistant materials, a working surface 12 arranged on the grate cooler 1 is made of high-temperature-resistant and wear-resistant materials, the thickness of the working surface 12 is 8mm, the working surface 12 runs linearly in a running mode, and the running speed is 0.5 m/s. The induced draft wind pressure of the induced draft fan 7 is 5000 Pa. The flue gas temperature of the hot blast stove 10 is 800 ℃;
the method for utilizing the dry cooling device for the iron slag of the zinc extraction rotary kiln comprises the following specific steps:
firstly, iron ore blocks in a bin 2 are fed onto a working surface 12 of a grate cooler 1 to form an iron ore block layer, and the thickness of the iron ore block layer is 200 mm;
step two, the high-temperature iron slag reduced by the reduction rotary kiln 3 falls to one side inside the discharge shell 15 through the high-temperature iron slag chute 13, then the driving motor 18 is started, the driving motor 18 drives the take-up pulley 20 to rotate, so that the steel wire 21 can be wound, the steel wire 21 drives the high-temperature iron slag to uniformly pass through the filter plate 16, and a high-temperature iron slag layer with the thickness of 100mm is formed on the iron ore block ore layer;
thirdly, conveying the iron ore lump ores and the high-temperature iron slag materials on the working surface 12 to a rotary kiln drying furnace 4 through a rotating device system of the grate cooler 1;
step four, the materials are fully mixed and subjected to heat exchange in the rotary kiln drying furnace 4, so that the moisture in the iron ore lump ore is dried, the temperature is also reduced at the moment, the temperature detector 23 can detect the temperature in the box body 11 at any time, when the temperature in the rotary kiln drying furnace 4 is detected to be insufficient, the hot blast stove 10 can be started to work through the control processor 22, and the hot blast stove 10 supplies hot air with the temperature of 800 ℃ to the drying furnace for heat supply; after drying, pulling the handle 26, driving the scraping plate 24 to move by the handle 26 through the pull rod 25, and driving the mixture to be discharged from the rotary kiln drying furnace 4 into the crushing and screening system 9 together by the scraping plate 24;
fifthly, screening iron-containing materials after the mixed materials of the iron ore lump ores and the iron slag enter a crushing and screening system 9, and using the iron-containing materials for blast furnace iron making and sintering;
and step six, the flue gas generated in the box body 11 and the rotary kiln drying furnace 4 respectively enters the dust removal and desulfurization system 8 through the first flue gas pipeline 5 and the second flue gas pipeline 6 under the action of the draught fan 7, and the dust removal and desulfurization system 8 removes dust and desulfurizes the flue gas, so that the flue gas reaches the standard and is discharged.
Example 2
In a dry cooling device for iron slag of a zinc extraction rotary kiln, the thickness of a working surface 12 is 10mm, the running speed is 1m/s, the induced air pressure of an induced draft fan 7 is 8000Pa, and the flue gas temperature of a hot blast stove 10 is 1000 ℃; the rest is unchanged;
in the method of the dry cooling device for the iron slag of the zinc extraction rotary kiln, the thickness of an iron ore block ore layer formed is 300mm, and the thickness of a high-temperature iron slag layer formed is 200 mm; the hot blast stove 10 provides up to 1000 ℃; the rest is unchanged.
Example 3
In a dry cooling device for iron slag of a zinc extraction rotary kiln, the thickness of a working surface 12 is 20mm, the running speed is 1.5m/s, the induced air pressure of an induced draft fan 7 is 12000Pa, and the flue gas temperature of a hot blast stove 10 is 1200 ℃; the rest is unchanged;
in the method of the dry cooling device for the iron slag of the zinc extraction rotary kiln, the thickness of an iron ore block ore layer formed is 500mm, and the thickness of a high-temperature iron slag layer formed is 300 mm; the hot blast stove 10 provides up to 1000 ℃; the rest is unchanged.
According to the embodiment, the requirement on the thickness of the working surface 12 on the grate cooler 1 can be controlled within the range of 8-20mm, only the thickness of the working surface 12 needs to be controlled within the range of 8-20m in the production and manufacturing process, the range of the required thickness is wider, the production and manufacturing are easy, and the difficulty of precisely designing the thickness of the working surface 12 by a manufacturer is reduced; the thickness of the formed iron ore block ore layer is controlled to be 500mm at 200-; meanwhile, the running speed of the working surface 12, the air pressure of the induced draft fan 7 and the temperature of the hot blast stove 10 can be adjusted according to the actual use condition, so that the device is easy to popularize.
The functions of the structures used in the present invention are specifically as follows:
a storage bin 2: the storage bin 2 is used for storing materials and discharging materials;
high-temperature iron slag chute 13: the method is used for blanking the high-temperature iron slag;
reducing the rotary kiln 3: the reducing rotary kiln 3 leads the reduced high-temperature iron slag to enter an iron ore block ore bed through a high-temperature iron slag chute 13;
the working surface 12 is used for bearing iron ore lump ores and high-temperature iron slag and is driven by a rotating device system of the grate cooler 1;
a rotary kiln drying furnace 4, which fully mixes the iron ore lump ores and the high-temperature iron slag to fully dry the moisture in the iron ore lump ores;
a discharging chute 14, which discharges the dried iron ore lump ore and the cooled high-temperature iron slag to the crushing and screening system 9;
the induced draft fan 7 is used for conveying the flue gas to the dedusting and desulfurizing system 8;
the dust removal and desulfurization system 8 is used for performing dust removal and desulfurization on the flue gas and then discharging the flue gas after the flue gas reaches the standard;
the crushing and screening system 9 is used for crushing and screening the dried iron ore blocks and the cooled iron slag to screen out raw materials for making iron for the blast furnace;
the box body 11 and the upper part of the grate cooler 1 adopt a sealing structure to prevent the smoke from overflowing;
the hot blast stove 10 is used as an auxiliary heat source and is used for providing a heat source for the rotary kiln drying furnace 4;
the invention is concretely applied as follows:
the iron ore lump ore containing 14 percent of water is discharged onto the working surface 12 of the grate cooler 1, the discharging amount is 15t/h, an iron ore lump ore layer with the thickness of 500mm is formed, and the iron ore lump ore layer runs below the iron slag discharge device through the grate cooler 1;
blanking the high-temperature iron slag at 1200 ℃ to an iron ore lump ore layer, wherein the blanking amount is 5t/h, the thickness of the formed high-temperature iron slag layer is 200mm, and the high-temperature iron slag layer and the iron ore lump ore are conveyed into a rotary kiln drying furnace 4 together at the speed of 1m/min through a grate cooler;
after the iron ore lump ore and the high-temperature iron slag run in the rotary kiln drying furnace 4 for 60min, the discharging temperature is 150 ℃, and the mixed materials are conveyed to a crushing and screening system 9 together;
after the mixed material of the iron ore lump ore and the iron slag enters a crushing and screening system 9, screening iron-containing materials with the granularity of 8-35mm for blast furnace iron making, and with the granularity of 0-8mm for granulation and sintering;
flue gas generated in a box body 11 of the grate cooler 1 and a rotary kiln drying furnace 4 enters a dust removal and desulfurization system 8 through a first flue gas pipeline 5, a second flue gas pipeline 6 and an induced draft fan 7 together, the pressure of the induced draft fan 7 is 8000Pa, and the whole process has no overflow of the flue gas;
the dedusting and desulfurizing system 8 is used for dedusting and desulfurizing the flue gas, so that the flue gas is discharged after reaching the national standard.
Compared with the traditional method for treating the iron slag by water quenching, the method provided by the invention improves the water quenching field environment, has the waste heat utilization efficiency of the high-temperature iron slag of more than 90 percent, saves water resources, improves the added value of the iron slag, and has simple process equipment and low investment and operation cost.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (7)
1. A dry cooling device for iron slag of a zinc extraction rotary kiln is characterized in that: comprises a grate cooler (1), a rotary kiln drying furnace (4) and a hot blast furnace (10), wherein a box body (11) is fixedly connected to the grate cooler (1), a storage bin (2) and a reduction rotary kiln (3) are respectively installed on two sides of the top of the box body (11), a first flue gas pipeline (5) and a second flue gas pipeline (6) are respectively communicated to the box body (11) and the rotary kiln drying furnace (4), the first flue gas pipeline (5) and the second flue gas pipeline (6) are connected to a dust removal and desulfurization system (8) through a draught fan (7), a working surface (12) is arranged on the grate cooler (1), a high-temperature iron slag chute (13) is connected to the bottom of the reduction rotary kiln (3), an iron slag discharge device is connected to the bottom of the high-temperature iron slag chute (13), and air inlets of the first flue gas pipeline (5) and the second flue gas pipeline (6) are respectively communicated to the box body (11) and the rotary kiln drying furnace (4), the rotary kiln drying furnace is characterized in that a discharging chute (14) is communicated with the bottom of the rotary kiln drying furnace (4), the discharging chute (14) is communicated with a crushing and screening system (9), the hot blast stove (10) is used for supplying heat to the rotary kiln drying furnace (4), and the hot blast stove (10) is controlled by a control system.
2. The dry cooling device for the iron slag of the zinc extraction rotary kiln according to claim 1, is characterized in that: iron slag discharge device is including arranging material shell (15), it has push pedal (17) to arrange material shell (15) inside sliding connection, and arranges material shell (15) top one side fixed mounting have driving motor (18), the diapire of arranging material shell (15) is equipped with filter (16), it is provided with leading wheel (19) to arrange the inside one side of material shell (15), the output of driving motor (18) is connected with take-up pulley (20), and take-up pulley (20) surface winding has steel wire (21), and steel wire (21) are connected with push pedal (17) through leading wheel (19).
3. The dry cooling device for the iron slag of the zinc extraction rotary kiln according to claim 1, is characterized in that: the control system comprises a control processor (22) and a temperature detector (23) mounted on the box (11).
4. The dry cooling device for the iron slag of the zinc extraction rotary kiln according to claim 1, is characterized in that: the rotary kiln drying furnace (4) is internally and slidably connected with a scraping plate (24), one side of the scraping plate (24) is connected with a pull rod (25), and one end of the pull rod (25) is connected with a handle (26).
5. The dry cooling device for the iron slag of the zinc extraction rotary kiln according to claim 1, is characterized in that: the grate cooler (1) and the box body (11) are both made of temperature-resistant materials, and a working surface (12) placed on the grate cooler (1) is made of high-temperature-resistant and wear-resistant materials.
6. The dry cooling device for the iron slag of the zinc extraction rotary kiln according to claim 1, is characterized in that: the induced draft air pressure of the induced draft fan (7) is 5000-12000 Pa.
7. The working method of the dry cooling device for the iron slag of the zinc extraction rotary kiln according to any one of claims 1 to 6, is characterized by comprising the following steps:
firstly, iron ore blocks in a storage bin (2) are fed onto a working surface (12) on the grate cooler (1) to form an iron ore block layer;
secondly, enabling the high-temperature iron slag reduced by the reduction rotary kiln (3) to pass through a high-temperature iron slag chute (13) and an iron slag discharging device to form a high-temperature iron slag layer on the iron ore block ore layer;
thirdly, conveying the iron ore lump ores and the high-temperature iron slag materials on the working surface (12) to a rotary kiln drying furnace (4) through a rotating device system of the grate cooler (1);
fourthly, the materials are fully mixed and subjected to heat exchange in the rotary kiln drying furnace (4), the hot blast stove (10) is started to work according to the control system, and the hot blast stove (10) provides hot air to supply heat for the drying furnace; after drying is finished, discharging the mixture into a crushing and screening system (9) from the rotary kiln drying furnace (4);
fifthly, screening iron-containing materials after the mixed materials of the iron ore lump ores and the iron slag enter a crushing and screening system (9) for blast furnace iron making and sintering;
and step six, the flue gas generated in the box body (11) and the rotary kiln drying furnace (4) respectively enters the dedusting and desulfurizing system (8) through the first flue gas pipeline (5) and the second flue gas pipeline (6) under the action of the draught fan (7), and the dedusting and desulfurizing system (8) removes dust and desulfurizes the flue gas and then discharges the flue gas after the flue gas reaches the standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111296662.4A CN114111354B (en) | 2021-11-03 | 2021-11-03 | Dry cooling device for zinc-extracting rotary kiln iron slag and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111296662.4A CN114111354B (en) | 2021-11-03 | 2021-11-03 | Dry cooling device for zinc-extracting rotary kiln iron slag and working method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114111354A true CN114111354A (en) | 2022-03-01 |
| CN114111354B CN114111354B (en) | 2023-06-02 |
Family
ID=80380598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111296662.4A Active CN114111354B (en) | 2021-11-03 | 2021-11-03 | Dry cooling device for zinc-extracting rotary kiln iron slag and working method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114111354B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101977866A (en) * | 2008-03-20 | 2011-02-16 | 杰富意钢铁株式会社 | Cooling treatment system and cooling treatment method of molten slag |
| CN202415574U (en) * | 2011-12-20 | 2012-09-05 | 南京凯盛开能环保能源有限公司 | Molten slag quenching and dry granulating and sensible heat recovery power generation system |
| KR20130060083A (en) * | 2011-11-29 | 2013-06-07 | 현대제철 주식회사 | Device for recovering valuable metal and producing of multi-functional aggregate using slag |
| CN103930573A (en) * | 2012-06-27 | 2014-07-16 | 新日铁住金株式会社 | Slag supply container for electric furnace for steel slag reduction |
| CN104307628A (en) * | 2014-09-19 | 2015-01-28 | 河南金利金铅有限公司 | Method for comprehensive utilization of fuming furnace slag from lead and zinc smelting |
| CN204824932U (en) * | 2015-07-15 | 2015-12-02 | 南京凯盛开能环保能源有限公司 | Power generation system is retrieved to high slag integrated treatment and sensible heat |
-
2021
- 2021-11-03 CN CN202111296662.4A patent/CN114111354B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101977866A (en) * | 2008-03-20 | 2011-02-16 | 杰富意钢铁株式会社 | Cooling treatment system and cooling treatment method of molten slag |
| KR20130060083A (en) * | 2011-11-29 | 2013-06-07 | 현대제철 주식회사 | Device for recovering valuable metal and producing of multi-functional aggregate using slag |
| CN202415574U (en) * | 2011-12-20 | 2012-09-05 | 南京凯盛开能环保能源有限公司 | Molten slag quenching and dry granulating and sensible heat recovery power generation system |
| CN103930573A (en) * | 2012-06-27 | 2014-07-16 | 新日铁住金株式会社 | Slag supply container for electric furnace for steel slag reduction |
| CN104307628A (en) * | 2014-09-19 | 2015-01-28 | 河南金利金铅有限公司 | Method for comprehensive utilization of fuming furnace slag from lead and zinc smelting |
| CN204824932U (en) * | 2015-07-15 | 2015-12-02 | 南京凯盛开能环保能源有限公司 | Power generation system is retrieved to high slag integrated treatment and sensible heat |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114111354B (en) | 2023-06-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104550201B (en) | A kind of cement kiln associated treatment house refuse system and method thereof | |
| CN100463975C (en) | Production of sponge iron | |
| CN111850194A (en) | High-temperature steel slag bottom blowing air cooling crushing waste heat recovery device and method | |
| CN109306407B (en) | Device and method for treating and utilizing metallurgical zinc-containing dust | |
| US3313617A (en) | Iron-containing flux material for steel-making process | |
| CN105087947B (en) | The method that zinc is extracted from blast furnace gas mud | |
| CN103344114A (en) | Novel energy-saving emission-reduction sintering machine system and sintering method | |
| CN110205495A (en) | Pyrogenic process comprehensive recycling method for copper-containing and nickel-containing sludge | |
| CN113028827A (en) | Operation method of spodumene calcination conversion device | |
| CN210596200U (en) | Processing apparatus of high-efficient zinc that removes in follow iron and steel enterprise's zinciferous fly ash | |
| CN114111354A (en) | Dry cooling device for zinc extraction rotary kiln iron slag and working method thereof | |
| CN115896379B (en) | Application method of European smelting furnace system for iron making by utilizing scrap steel | |
| CN202626235U (en) | Equipment for producing steel-making slag former by virtue of steel-making sludge | |
| CN210399936U (en) | Clean sintering system based on fuel preparation and roasting control | |
| CN102719665B (en) | Process method for producing slag-forming agent for making steel by utilizing steel making sludge | |
| CN217351486U (en) | Production line for treating ferrous metallurgy dust and sludge based on rotary hearth furnace method | |
| CN105970000A (en) | Method and device for increasing utilization ratio of hazardous zinc-bearing wastes through rotary kiln | |
| CN105861819A (en) | Pressing block production process for oxide iron scale cutting slag added with metal bonding agent | |
| CN215713243U (en) | System for improving medium-temperature denitration effect of chain grate machine rotary kiln pellets | |
| CN214193316U (en) | Liquid blast furnace slag dry-type granulation treatment device | |
| US10851430B2 (en) | Flash ironmaking system and method | |
| AU2022200483B1 (en) | Method for recovering valuable metal from high-zinc and high-lead smelting slag | |
| CN112877491A (en) | Vertical coal-based and gas-based mixed metal iron direct reduction furnace and process thereof | |
| CN206469669U (en) | A kind of segmented rotary kiln | |
| CN110564957A (en) | Treatment device and method for efficiently removing zinc from zinc-containing dedusting ash of iron and steel enterprises |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 410000 room 402, 4th floor, building A1, lingzhi Industrial Park, No. 128 Jinhai Road, Yuhua District, Changsha City, Hunan Province Patentee after: Zhongke Boyi Environmental Protection Technology Co.,Ltd. Address before: 410000 room 402, 4th floor, building A1, lingzhi Industrial Park, No. 128 Jinhai Road, Yuhua District, Changsha City, Hunan Province Patentee before: HUNAN BOE ENVIRONMENT PROTECTION TECHNOLOGY CO.,LTD. |