CN214235540U - System for secondary aluminum ash is dealt with in coordination to cement kiln - Google Patents
System for secondary aluminum ash is dealt with in coordination to cement kiln Download PDFInfo
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- CN214235540U CN214235540U CN202023035266.XU CN202023035266U CN214235540U CN 214235540 U CN214235540 U CN 214235540U CN 202023035266 U CN202023035266 U CN 202023035266U CN 214235540 U CN214235540 U CN 214235540U
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- 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
- Y02P10/20—Recycling
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- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The utility model discloses a system for cement kiln deals with secondary aluminium ash in coordination relates to aluminium ash processing technology field. The system for treating the secondary aluminum ash in cooperation with the cement kiln comprises a ball mill, a winnowing device and a cement kiln co-treatment system; the outlet of the ball mill is connected with the inlet of the air separation device; the front end of the winnowing device is connected with an air blower, and the rear end of the winnowing device is provided with a cyclone dust collector; the winnowing device is provided with a heavy component outlet and a light component outlet; the cement kiln co-processing system comprises a cement kiln decomposition kiln, a rotary kiln and flue gas treatment equipment which are sequentially connected; and the light component outlet of the winnowing device is communicated with the cement kiln decomposition kiln. The system for treating the secondary aluminum ash in cooperation with the cement kiln has the characteristics of simple treatment process, complete recycling, no waste water and waste residue and the like, and truly realizes complete reduction, harmless and recycling treatment of the secondary aluminum ash.
Description
Technical Field
The utility model relates to an aluminium ash processing technology field, concretely relates to cement kiln deals with system of secondary aluminium ash in coordination.
Background
The aluminum ash is generated in all aluminum melting processes such as aluminum electrolysis and aluminum (including secondary aluminum) processing. The source of the aluminum ash can be divided into aluminum ash generated in the aluminum electrolysis smelting process, aluminum ash in the aluminum casting process and aluminum ash in the secondary aluminum processing process. In the major electrolytic aluminum countries with the highest average world capacity and production, the amount of aluminum ash discharged by electrolytic aluminum, aluminum processing and secondary aluminum in China is conservative and estimated to be more than 300 million tons, and the quantity of the aluminum ash is increased to thousands of tons after the aluminum ash is stockpiled and buried for many years.
The method can be divided into primary aluminum ash and secondary aluminum ash according to the processing process. Primary aluminum ash: the aluminum alloy is tapped from a smelting furnace and contains 20-70% of metallic aluminum simple substance. Secondary aluminum ash: the aluminum ash is the rest part after primary aluminum ash extraction, the content of the metallic aluminum simple substance is lower than 15%, the metallic aluminum sheet can be continuously extracted by separation methods such as ball milling, gravity separation, electric separation and the like, and the aluminum ash with the metallic aluminum content lower than 1-5% is further extracted by cold processing (the metallic aluminum simple substance is difficult to extract), so that the aluminum ash is the pain point of the current aluminum ash environment-friendly disposal.
The secondary aluminum ash is gray black powder and contains components such as metallic aluminum, aluminum nitride, aluminum carbide, aluminum oxide, oxides of other metal elements, chlorides and the like. The main disposal methods of the secondary aluminum ash comprise: the prepared polyaluminium chloride is used as a water purifying agent, high-purity alumina is extracted, refractory materials are produced, building materials such as ceramic brick and the like are manufactured, and the like. However, aluminum nitride in the aluminum ash generates ammonia gas when meeting water, and generates gases such as nitrogen gas when heated at high temperature. Therefore, when polyaluminium chloride and high-purity alumina are prepared by a wet method, the quality of products is influenced due to the generation of ammonia gas; meanwhile, when the refractory material and the ceramic ganged brick are fired, the aluminum nitride is heated, oxidized and decomposed to generate gas, air holes are formed, and the strength of the product is influenced.
At present, the treatment process of the resource treatment method of the secondary aluminum ash is complex, and most of the secondary aluminum ash is subjected to wet washing pretreatment to remove aluminum nitride and waste salt in the secondary aluminum ash, so that a large amount of waste water is generated to be treated, and pollutants such as waste gas (ammonia gas), waste residue (waste salt) and the like are generated. For example, chinese patents with publication numbers CN201810862255, CN201710996711, CN201811028917, CN20181006270, etc. all have wet water washing processes, and generate a large amount of wastewater. Chinese patents for cooperatively treating secondary fly ash by a cement kiln have publication numbers of CN201810964307, CN201810777022 and the like, but the patents also need water washing pretreatment, and simultaneously generate a large amount of byproducts such as waste salt and the like, particularly, recently, aluminum ash is listed in the name of the national hazardous waste bulletin board, namely is formally defined as hazardous waste, so that the subsequent treatment of the byproducts in the aluminum ash treatment process is more difficult. Therefore, the current secondary aluminum ash disposal has the problems of complex disposal process, more byproducts, no realization of complete recycling and harmlessness and the like.
SUMMERY OF THE UTILITY MODEL
To the problem that exists above, the utility model provides a system and method of secondary aluminium ash is dealt with in coordination to cement kiln has characteristics such as the processing process is simple, complete resourceization, no waste water waste residue produces, has really realized complete minimizing, innoxious, the resourceization treatment of secondary aluminium ash, and concrete scheme is as follows:
the system for treating the secondary aluminum ash in cooperation with the cement kiln comprises a ball mill, a winnowing device and a cement kiln co-treatment system;
the outlet of the ball mill is connected with the inlet of the air separation device; the front end of the winnowing device is connected with an air blower, and the rear end of the winnowing device is provided with a cyclone dust collector; the winnowing device is provided with a heavy component outlet and a light component outlet;
the cement kiln co-processing system comprises a cement kiln decomposition kiln, a rotary kiln and flue gas treatment equipment which are sequentially connected; and the light component outlet of the winnowing device is communicated with the cement kiln decomposition kiln.
Furthermore, the waste gas treatment system comprises a bag-type dust remover and a waste gas conveying pipeline of the air separation device, and the waste gas conveying pipeline of the air separation device is connected with the bag-type dust remover and the air separation device.
Further, the bag breaking machine is further included; the outlet of the bag breaking machine is connected with the inlet of the ball mill.
Preferably, a negative pressure dust suction pipeline is arranged above the bag breaking machine and connected with the bag-type dust collector.
Preferably, the air separation device is a vertical air separation device, and a vertical air separation area of the air separation device is provided with a screen mesh, and the aperture of the screen mesh is 80-120 meshes.
Furthermore, the device also comprises a pumping device, an inlet of the pumping device is connected with a light component outlet of the air separation device, and a nozzle of the pumping device is connected with the cement kiln decomposition kiln.
Preferably, the nozzle of the pumping device directly extends into the cement kiln decomposition kiln, and the nozzle is positioned at the middle lower part of the cement kiln decomposition kiln.
Furthermore, the bag-type dust collector is connected with a pumping device.
Furthermore, the device also comprises a metal aluminum collecting device, and the metal aluminum collecting device is connected with the heavy component outlet of the air separation device.
The utility model discloses a system for secondary aluminium ash is dealt with in coordination to cement kiln utilizes cement kiln to deal with the flying dust in coordination, and process flow is simple, and energy saving and consumption reduction, metallic aluminum are retrieved by the separation in the aluminium ash, and other compositions are solidified in cement clinker, realize the complete resourceful processing of flying dust.
The pretreatment process of the aluminum ash does not need water washing, does not generate pollutants such as wastewater, waste salt and the like, has low treatment cost, and realizes the complete harmless treatment of the fly ash.
Through ball milling pretreatment, the aluminum nitride is completely oxidized and decomposed at high temperature, the cement quality is ensured, and the further recycling of the metal aluminum is realized through winnowing separation.
The system for treating the secondary aluminum ash in cooperation with the cement kiln has the characteristics of simple treatment process, complete recycling, no waste water and waste residue and the like, and truly realizes complete reduction, harmless and recycling treatment of the secondary aluminum ash.
Drawings
FIG. 1 is a schematic flow diagram of a system for co-processing secondary aluminum ash in a cement kiln according to an embodiment of the present invention.
Detailed Description
In order to more fully understand the technical content of the present invention, the technical solution of the present invention will be further described and explained with reference to the specific embodiments.
Examples
The system for treating secondary aluminum ash in cooperation with the cement kiln as shown in fig. 1 comprises a material pretreatment system, a material sorting and conveying system, a cement kiln co-treatment system and a waste gas treatment system.
1) Material pretreatment system
The material pretreatment system mainly comprises a bag breaking machine, a ball mill and a related conveying device. The bag breaking machine outlet is connected with the inlet of the ball mill, the outlet of the ball mill is connected with the inlet of the winnowing device (winnowing machine), and a negative pressure dust absorption pipeline is arranged above the bag breaking machine and is connected with a bag-type dust remover of the waste gas treatment system.
And conveying the secondary aluminum ash packaged by the ton bag into a bag breaking machine by a forklift, and then feeding the secondary aluminum ash into a ball mill after the bag is broken. After the aluminum ash is subjected to ball milling, the particle size of aluminum nitride in the aluminum ash is further reduced, so that the subsequent high-temperature oxidative decomposition of the aluminum nitride in a cement kiln is facilitated, and the cement clinker is ensured not to contain aluminum nitride, thereby ensuring the quality of cement. Meanwhile, after the aluminum ash is subjected to ball milling, the metal aluminum is ground into aluminum sheets, so that the subsequent winnowing separation is facilitated.
2) Sorting and conveying system
Mainly comprises a winnowing device (a winnowing machine), a metal aluminum collecting device, a pumping device, a waste gas conveying pipeline of the winnowing device and the like. The winnowing device is vertical winnowing equipment, the front end of the winnowing device is connected with a blower, the vertical winnowing area is provided with a screen, the aperture of the screen is 80-120 meshes, and the rear end of the screen is provided with a cyclone dust collector. The heavy component outlet of the winnowing device is connected with the metal aluminum collecting device, the light component outlet of the winnowing device is connected with the inlet of the pumping device, and the waste gas outlet of the winnowing device is connected with the bag-type dust collector through a waste gas conveying pipeline of the winnowing device.
The aluminum ash enters an air separation device after being ball-milled, under the action of wind power of an air blower, the metal aluminum sheets are heavy and are discharged from a heavy component outlet to enter a metal aluminum collection device, meanwhile, light component aluminum ash powder passes through a screen to enter a cyclone dust collector, after separation, the aluminum ash powder enters a pumping device from a light component outlet, and waste gas enters a subsequent bag-type dust collector.
3) Cement kiln co-processing system
The cement kiln co-processing system is used for co-processing pretreated aluminum ash by utilizing the existing cement kiln production equipment, and mainly comprises a cement kiln decomposition kiln, a rotary kiln and flue gas treatment equipment. The nozzle of the pumping device directly extends into the decomposition kiln, and the nozzle is positioned at the middle lower part of the decomposition kiln. The total adding amount of the aluminum ash accounts for 0.5-2% of the clinker in the cement kiln.
The aluminum ash is sent into a cement kiln decomposition kiln through a pumping device and then enters a rotary kiln, and the aluminum nitride in the aluminum ash is oxidized and decomposed into nitrogen and aluminum oxide at high temperature, so that the aim of removing the aluminum nitride is fulfilled. The gas after the aluminum ash pyrolysis enters a cement kiln flue gas system to be treated and discharged after reaching the standard, and inorganic components such as alumina and heavy metals in the aluminum ash are solidified into cement clinker, so that the resource treatment of the aluminum ash is realized.
4) Exhaust gas treatment system
The waste gas treatment system is a waste gas system utilizing the kiln head of the existing cement kiln and mainly comprises a bag-type dust remover, a waste gas conveying pipeline of a bag breaking machine and a waste gas conveying pipeline of a winnowing device. The waste gas conveying pipeline of the bag breaking machine is communicated with a negative pressure dust collecting pipeline above the bag breaking machine and the bag-type dust collector, and the waste gas conveying pipeline of the winnowing device is connected with an inlet of the bag-type dust collector.
Waste gas and fly ash generated by the bag breaking machine and waste gas and fly ash generated by the winnowing device respectively enter the bag-type dust remover through a waste gas conveying pipeline, and the gas after dust removal reaches the standard and is discharged. The dust collected by the bag-type dust collector enters a pumping device and is sent into a cement kiln for cooperative treatment, so that no waste slag is discharged, and complete recycling treatment is realized.
The system for treating the secondary aluminum ash in cooperation with the cement kiln utilizes the cement kiln to treat the fly ash in cooperation, has simple process flow, saves energy and reduces consumption, metal aluminum in the aluminum ash is separated and recovered, and other components are solidified in cement clinker, thereby realizing the complete resource treatment of the fly ash. The method has the characteristics of simple treatment process, complete recycling, no waste water and waste residue and the like, and truly realizes complete reduction, harmless and recycling treatment of the secondary aluminum ash.
Meanwhile, through ball milling pretreatment, complete oxidative decomposition of aluminum nitride at high temperature is guaranteed, the quality of cement is guaranteed, and further recycling of metal aluminum is realized through winnowing separation. The pretreatment process of the aluminum ash does not need water washing, does not generate pollutants such as wastewater, waste salt and the like, has low treatment cost, and realizes the complete harmless treatment of the fly ash.
The technical content of the present invention is further described by the above embodiments only, so as to facilitate the reader to understand more easily, but not to represent that the embodiments of the present invention are limited only to this, and any technical extension or re-creation according to the present invention is protected by the present invention.
Claims (9)
1. A system for cooperatively processing secondary aluminum ash by a cement kiln is characterized by comprising a ball mill, a winnowing device and a cement kiln cooperative processing system;
the outlet of the ball mill is connected with the inlet of the air separation device; the front end of the winnowing device is connected with an air blower, and the rear end of the winnowing device is provided with a cyclone dust collector; the winnowing device is provided with a heavy component outlet and a light component outlet;
the cement kiln co-processing system comprises a cement kiln decomposition kiln, a rotary kiln and flue gas treatment equipment which are sequentially connected; and the light component outlet of the winnowing device is communicated with the cement kiln decomposition kiln.
2. The system for co-processing secondary aluminum ash in a cement kiln as claimed in claim 1, further comprising an exhaust gas treatment system, wherein the exhaust gas treatment system comprises a bag-type dust remover and an exhaust gas conveying pipeline of the air separation device, and the exhaust gas conveying pipeline of the air separation device is connected with the bag-type dust remover and the air separation device.
3. The system for cement kiln co-processing secondary aluminum ash as recited in claim 2, further comprising a bag breaker; the outlet of the bag breaking machine is connected with the inlet of the ball mill.
4. The system for the cooperative disposal of secondary aluminum ash in a cement kiln as recited in claim 3, wherein a negative pressure dust suction pipeline is arranged above the bag breaking machine and connected with a bag-type dust remover.
5. The system for co-processing secondary aluminum ash in a cement kiln as claimed in claim 4, wherein the air separation device is a vertical air separation device, the vertical air separation area is provided with a screen mesh, and the aperture of the screen mesh is 80-120 meshes.
6. The system for the co-disposal of secondary aluminum ash in a cement kiln as recited in claim 5, further comprising a pumping means, wherein an inlet of the pumping means is connected to the light component outlet of the air separation means, and a nozzle of the pumping means is connected to the cement kiln decomposition kiln.
7. The system for the co-disposal of secondary aluminum ash in a cement kiln as recited in claim 6, wherein the nozzle of the pumping device directly extends into the cement kiln decomposition kiln, and the nozzle is located at the middle lower part of the cement kiln decomposition kiln.
8. The system for the co-disposal of secondary aluminum ash in a cement kiln as recited in claim 7, wherein the bag-type dust collector is connected to a pumping device.
9. The system for the co-disposal of secondary aluminum ash in a cement kiln as recited in claim 8, further comprising a metallic aluminum collection device connected to the heavy component outlet of the air separation device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023035266.XU CN214235540U (en) | 2020-12-16 | 2020-12-16 | System for secondary aluminum ash is dealt with in coordination to cement kiln |
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| CN202023035266.XU CN214235540U (en) | 2020-12-16 | 2020-12-16 | System for secondary aluminum ash is dealt with in coordination to cement kiln |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114100847A (en) * | 2021-11-19 | 2022-03-01 | 东北大学 | Aluminum ash treatment method |
| CN114733888A (en) * | 2022-02-22 | 2022-07-12 | 北京航天环境工程有限公司 | Method and system for comprehensively utilizing secondary aluminum ash |
| CN115178574A (en) * | 2022-06-23 | 2022-10-14 | 湖州威能环境服务有限公司 | Aluminum ash resourceful treatment system |
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2020
- 2020-12-16 CN CN202023035266.XU patent/CN214235540U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114100847A (en) * | 2021-11-19 | 2022-03-01 | 东北大学 | Aluminum ash treatment method |
| CN114733888A (en) * | 2022-02-22 | 2022-07-12 | 北京航天环境工程有限公司 | Method and system for comprehensively utilizing secondary aluminum ash |
| CN115178574A (en) * | 2022-06-23 | 2022-10-14 | 湖州威能环境服务有限公司 | Aluminum ash resourceful treatment system |
| CN115178574B (en) * | 2022-06-23 | 2023-05-30 | 湖州威能环境服务有限公司 | Aluminum ash recycling treatment system |
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