CN114477811A - Treatment system and treatment method for solid material of electrolytic aluminum - Google Patents

Treatment system and treatment method for solid material of electrolytic aluminum Download PDF

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Publication number
CN114477811A
CN114477811A CN202011245664.6A CN202011245664A CN114477811A CN 114477811 A CN114477811 A CN 114477811A CN 202011245664 A CN202011245664 A CN 202011245664A CN 114477811 A CN114477811 A CN 114477811A
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China
Prior art keywords
solid
grinding
crushing
materials
receiving
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CN202011245664.6A
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Chinese (zh)
Inventor
徐伟
许晓帆
刘强
侯滨生
高立明
刘书妍
张凯歌
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Sichuan Longshengxin Construction Engineering Co ltd
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Sichuan Longshengxin Construction Engineering Co ltd
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Priority to CN202011245664.6A priority Critical patent/CN114477811A/en
Publication of CN114477811A publication Critical patent/CN114477811A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
    • C04B7/40—Dehydrating; Forming, e.g. granulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/183—Feeding or discharging devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Food Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention relates to a disposal system and a disposal method for solid materials of electrolytic aluminum. The treatment system comprises: the material receiving and crushing system at least comprises a crushing device, wherein the crushing device receives a solid material containing electrolytic aluminum overhaul residues and crushes the solid material into a crushed material; the grinding system at least comprises a grinding device communicated with the crushing device, and the grinding device receives the crushed materials and grinds the crushed materials into powdery materials; and the kiln feeding system at least comprises a first conveying device communicated with the grinding device, and the first conveying device receives the powdery material and conveys the powdery material into a cement kiln decomposing furnace. The invention can realize harmless treatment and comprehensive utilization of the electrolytic aluminum overhaul residues.

Description

Treatment system and treatment method for solid material of electrolytic aluminum
Technical Field
The invention relates to a disposal system and a disposal method for solid materials of electrolytic aluminum, in particular to a disposal system and a disposal method for comprehensive utilization of electrolytic aluminum overhaul residues, and particularly relates to a disposal system and a disposal method for harmless comprehensive utilization of electrolytic aluminum overhaul residues by depending on a cement kiln system.
Background
The electrolytic aluminum overhaul slag is solid waste generated in the electrolytic aluminum electrolysis process, the aluminum electrolysis cell needs to be overhauled after working for 4-7 years, and the waste cathode carbon blocks, the waste refractory materials, the waste heat insulation materials and the like are mainly removed. The current capacity, lining structure, lining material type, electrolysis process condition, operation system and service life of the electrolytic aluminum plant are greatly different, the specific composition of the waste is also greatly different, but the main compositions are basically the same.
Wherein the waste refractory material mainly contains SiC and Si3N4And NaF and Na immersed in the electrolytic aluminum process3AlF6The harm is mainly caused by containing a large amount of soluble fluoride and cyanide, the fluorine content of the leaching solution can reach 6000mg/L, and CN-The content can reach 10-40mg/L (different according to tank type, service life and operation process), and greatly exceeds the standard requirement of national Standard for identifying hazardous waste-identifying leaching toxicity (F)-＜100mg/L、CN-Less than 5mg/L), so the electrolytic aluminum solid waste belongs to industrial hazardous waste. In 2016, 3 months, the new national records of hazardous wastes of the Ministry of environmental protection of the nation (No. 39 of the order of the Ministry of environmental protection of 2016) have been specified, and overhaul residues generated by the overhaul of aluminum electrolysis cells belong to T-type industrial hazardous wastes.
Since the 21 st century, the electrolytic aluminum industry in China is rapidly developed, the electrolytic aluminum yield in China reaches 3227 ten thousand tons in 2017, the capacity breaks through 4000 ten thousand tons, the electrolytic aluminum is continuously located in the world first, and the yield accounts for 57 percent of the total amount of the world. Meanwhile, the environmental pollution problem of the electrolytic aluminum industry has received a high degree of attention from the nation, industry and society. The overhaul slag is typical harmful solid waste discharged in the electrolytic aluminum production process, 20-30kg of overhaul slag can be generated when one ton of electrolytic aluminum is produced on average, and the annual discharge amount reaches millions of tons. Because the overhaul residues contain soluble fluoride and cyanide with high toxicity, if the overhaul residues are not properly treated, the overhaul residues can be mixed into rivers along with rainwater and permeate into the underground to pollute surface water sources, underground water and soil, and great harm is caused to the surrounding ecological environment, human health and animal and plant growth. The harmless recycling treatment of the overhaul slag becomes one of the major problems to be solved urgently in the electrolytic aluminum industry.
At present, the treatment mode of the electrolytic bath overhaul slag in China mainly adopts landfill, and the construction of a landfill slag yard has high management requirements because of the risk of polluting an underground water system. The following difficulties mainly exist: 1. the site selection is difficult, particularly, the current environmental protection policy and standard are strict, the environment protection consciousness of residents is strong, and great difficulty is added to the site selection; 2. the construction seepage-proofing requirement is high, and the construction investment of a landfill site is large; 3. leachate is generated in the stacking process, and the risk of pollution of underground water and surface water exists when the leachate is not well treated. And the landfill is only a temporary disposal mode, is not a thorough disposal mode, and can leave a later history problem.
According to the physicochemical characteristics of the electrolytic aluminum, theoretical research proposes a method of utilizing acidolysis,
the Zhengzhou hong jumping environmental protection technology limited company, the large metallurgy design limited company in Hunan, the Zhengzhou light industry university and other units develop the four-step method process technology of 'acid-free leaching, oxidation cyanogen removal, calcium salt fluorine removal and physical sedimentation', can effectively remove harmful substances in the overhaul slag, and the treated material can strictly reach the national discharge standard, thereby effectively solving the problem of harmless treatment of the overhaul slag of the electrolytic cell in the aluminum plant.
The invention of application number CN201310355679.1 discloses a method for processing carbon slag in an electrolytic cell, which is characterized in that when the electrode of the electrolytic cell is changed and the edge is closed, along with the conventional electrode sealing procedure, the carbon slag to be processed is laid in the sealed ultrafine particles, the carbon slag spontaneously combusts to generate gas emission, the electrolyte in the carbon slag is condensed and enters the electrolytic cell, and the electrolyte in the carbon slag is recycled to the maximum extent. The treatment method does not influence the normal operation of the electrolytic cell, reduces the procedures of stacking, transporting and treating the carbon slag, greatly reduces the labor intensity, saves the labor time, improves the production efficiency and eliminates the pollution of the procedures to the environment; the method has the advantages of simple process and convenient operation, realizes the recycling of the electrolyte in the carbon slag, does not need to invest any cost and equipment, and is suitable for large-scale industrial application.
However, how to fully utilize the existing equipment to carry out resource utilization and harmless treatment on the solid material containing the electrolytic aluminum overhaul residues is also an urgent problem to be solved in the field of pollutant cooperative control.
Disclosure of Invention
In view of the above-mentioned drawbacks, an object of the present invention is to provide a system and a method for disposing solid materials of electrolytic aluminum, which can achieve harmless and recycling of solid materials containing electrolytic aluminum overhaul residues.
In order to achieve the above object, the present invention provides a system for handling solid materials of electrolytic aluminum, comprising: the material receiving and crushing system at least comprises a crushing device, wherein the crushing device receives a solid material containing electrolytic aluminum overhaul residues and crushes the solid material into a crushed material; the grinding system at least comprises a grinding device communicated with the crushing device, and the grinding device receives the crushed materials and grinds the crushed materials into powdery materials; and the kiln feeding system at least comprises a first conveying device communicated with the grinding device, and the first conveying device receives the powdery material and conveys the powdery material into a cement kiln decomposing furnace.
In an embodiment of the present invention, the grinding device is a tube mill, and the tube mill is filled with spherical grinding media.
In an embodiment of the present invention, the pulverizing system further includes a gas-solid separating device, a fan and a ventilation valve, the gas-solid separating device is communicated with the tube pulverizer through a pipeline, the fan is communicated with the gas-solid separating device, wherein a part of the powdery material in the tube pulverizer can be selected under the action of wind power of the fan and enters the gas-solid separating device through the pipeline to be separated to obtain a separated powdery material, and the ventilation valve provides wind to the pulverizing system and simultaneously controls the wind volume entering the tube pulverizer.
In an embodiment of the present invention, the material receiving and crushing system further includes a first rotary feeder, a second conveying device for conveying the crushed material is disposed between the first rotary feeder and the crushing device, and the crushed material is discharged into the tube mill after being locked by the first rotary feeder.
In an embodiment of the present invention, the grinding system further includes a second rotary feeder, a screw conveyor and a bucket elevator, wherein the unselected powdery materials in the tubular grinder can be discharged from the tubular grinder, and are conveyed by the second rotary feeder, the screw conveyor and the bucket elevator to enter the tubular grinder again for repeated grinding.
In an embodiment of the present invention, the crushing device is a crusher, a receiving hopper is disposed above the crusher, the material receiving and crushing system further includes a discharge pit for receiving the collected and transported solid materials, and a grab bucket is disposed between the discharge pit and the receiving hopper for grabbing the solid materials in the discharge pit into the receiving hopper; and/or the gas-solid separation device is a bag type dust collector; and/or the first conveying device is a pneumatic conveying device.
In an embodiment of the invention, the feeding system further includes a storage bin disposed after the pulverizing system.
In an embodiment of the present invention, the kiln feeding system further includes a metering device for controlling uniform discharging, which is disposed after the storage bin and before the first conveying device.
In an embodiment of the invention, the system for conveying materials into the kiln further comprises a scattering device for scattering materials, which is arranged at the kiln inlet of the cement kiln decomposition furnace.
In order to achieve the above object, the present invention further provides a method for disposing a solid material of electrolytic aluminum, which is disposed by using the disposal system, the method comprising: receiving a solid material containing electrolytic aluminum overhaul residues through a material receiving and crushing system and crushing the solid material into a crushed material; receiving the crushed material through a grinding system and grinding the crushed material into powdery material; and receiving the powdery material through a conveying kiln entering system and conveying the powdery material into a cement kiln decomposing furnace.
The invention realizes the harmless treatment of the solid material containing the electrolytic aluminum overhaul residues by utilizing the advantages of high temperature, alkaline environment and solid phase reaction of the cement kiln to solidify heavy metals. The invention also realizes the comprehensive utilization of the overhaul slag by utilizing the characteristics of the raw materials of the cement kiln. The invention also realizes that the overhaul slag enters the kiln in a powdery form by adopting the pre-crushing and grinding pretreatment, and better conforms to the characteristics of the cement kiln process. The invention also avoids the damage of the aluminum blocks in the overhaul residues to the grinding equipment by adopting a grinding mode of a tubular grinding machine filled with spherical grinding media. The tube type pulverizer provided by the invention is also provided with a slag discharge device, so that the aluminum blocks in the overhaul slag can be separated out and used as aluminum waste.
Drawings
FIG. 1 is a schematic structural diagram of a system for handling solid materials of electrolytic aluminum according to a preferred embodiment of the present invention;
FIG. 2 is a flow chart of a method for disposing solid materials of electrolytic aluminum according to a preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
The invention provides a disposal system for solid materials of electrolytic aluminum, which mainly comprises a material receiving and crushing system, a grinding system and a kiln conveying and feeding system. The material receiving and crushing system at least comprises a crushing device, and the crushing device can receive solid materials containing electrolytic aluminum overhaul residues and crush the solid materials into crushed materials. The grinding system at least comprises a grinding device communicated with the crushing device, and the grinding device can receive the crushed materials and grind the crushed materials into powdery materials. The kiln conveying system at least comprises a first conveying device communicated with the grinding device, and the first conveying device can receive the powdery material and convey the powdery material into the cement kiln decomposing furnace. Preferably, the grinding device is a tube type grinding machine, and spherical grinding media are filled in the grinding device, so that the damage of the aluminum blocks in the overhaul residues to the grinding device can be avoided. Preferably, the first conveying device may be, for example, a pneumatic conveying device, which may use compressed air as power for conveying, but not limited thereto.
In the present invention, the solid material includes, but is not limited to, solid waste generated in the electrolytic process of electrolytic aluminum, such as electrolytic aluminum overhaul slag, waste refractory and waste heat insulating material removed from an aluminum electrolytic cell during overhaul after 4 to 7 years of operation, and the solid waste is a solid massive hard material.
The invention makes full use of the advantages of high temperature, large capacity and capability of solidifying heavy metals of the cement kiln, takes inorganic components in the overhaul residues as raw materials for producing cement, decomposes cyanide and fluoride with hazardous characteristics at high temperature, forms new non-hazardous novel compounds in the cement kiln solidification reaction, and solidifies the heavy metals in the overhaul residues into cement clinker, thereby realizing harmless and resource utilization of the overhaul residues.
In an embodiment of the present invention, the grinding system may further include a gas-solid separation device, a fan, and a ventilation valve, wherein the gas-solid separation device is communicated with the tubular mill through a pipeline, and the fan is communicated with the gas-solid separation device. Part of powdery materials in the tubular mill can be selected out under the action of the wind power of the fan, enter the gas-solid separation device through the pipeline and are separated to obtain separated powdery materials. The ventilation valve can provide air to the grinding system and simultaneously control the air quantity entering the tubular grinding machine. Preferably, the gas-solid separation device may be, for example, a bag-type dust collector, but is not limited thereto. By designing the fan, qualified products can be selected from the tube mill, for example, powder particles with a certain particle size can be discharged out of the mill along with the airflow and can be collected by the bag type dust collector, and the product is obtained. And C in the ground powdery material can replace fire coal to serve as a substitute fuel for a cement kiln, and inorganic components in the powdery material can serve as raw materials for cement production, so that the effective recycling of solid wastes such as overhaul residues and the like is realized.
In an embodiment of the present invention, the material receiving and crushing system may further include a first rotary feeder, and a second conveying device, such as a belt conveyor, is disposed between the first rotary feeder and the crushing device for conveying the crushed material, and the crushed material is discharged into the tube mill after being locked by the first rotary feeder.
In an embodiment of the present invention, the pulverizing system may further include a second rotary feeder, a screw conveyor and a bucket elevator, wherein the unselected powdery materials in the tubular pulverizer can be discharged from the tubular pulverizer, and are conveyed by the second rotary feeder, the screw conveyor and the bucket elevator to enter the tubular pulverizer again for repeated pulverizing.
In an embodiment of the invention, the crushing device may be a crusher, for example, and a receiving hopper may be arranged above the crusher. The material receiving and crushing system may further comprise a discharge pit for receiving the collected and transported solid materials, and a grab bucket may be disposed between the discharge pit and the receiving hopper for grabbing the solid materials in the discharge pit into the receiving hopper.
In an embodiment of the present invention, the feeding system may further include a storage bin disposed behind the pulverizing system for storing a product as an alternative fuel. Preferably, the feeding system further comprises a metering device, such as but not limited to a belt scale, disposed after the storage bin and before the first conveying device for controlling uniform discharge. Preferably, the system for conveying materials into the kiln further comprises a scattering device which is arranged at the kiln inlet of the cement kiln decomposing furnace and used for scattering materials. Wherein the input of compressed air is also acceptable in the breaking device.
Referring to fig. 1, there is shown a structure of a solid material handling system for electrolytic aluminum by a cement kiln system according to a preferred embodiment of the present invention. The treatment system 100 preferably comprises three subsystems: a material receiving and crushing system 101, a grinding system 102 and a conveying kiln-entering system 103.
The material receiving and crushing system 101 consists of a discharge pit 1, a grab bucket 2, a receiving hopper 3, a crusher 4, a belt conveyor 5 and a rotary feeder 6, solid materials containing large overhaul residues entering the system can be crushed into small blocky materials through the system, basic conditions are provided for the material grinding effect, and in addition, the crushed materials can be conveyed to the grinding system.
The grinding system 102 is composed of a tubular grinding machine 7, a rotary blanking device 8, a screw conveyor 9, a bucket elevator 10, a bag type dust collector 11, a fan 12 and a ventilation valve 13. The materials can be ground into powdery materials through the tubular pulverizer 7, and the particle size of the materials entering the kiln is matched with the technological requirements of cement kiln calcination. The large-particle materials can be discharged and input into the tube mill again for regrinding through wind power powder selection.
The conveying and kiln-entering system 103 is composed of a storage bin 14, a belt metering scale 15, a pneumatic conveying device 16 and a scattering device 17, and ensures that materials are uniformly dispersed and enter the kiln.
The invention can treat solid materials containing the electrolytic aluminum overhaul residues through the treatment system shown in figure 1. As shown in fig. 2, a disposing method 200 according to a preferred embodiment of the present invention mainly includes the following steps:
step 201, receiving a solid material containing electrolytic aluminum overhaul residues through a material receiving and crushing system and crushing the solid material into a crushed material;
202, receiving the crushed material through a grinding system and grinding the crushed material into a powdery material;
and step 203, receiving the powdery material through a conveying kiln entering system and conveying the powdery material into a cement kiln decomposing furnace.
More specifically, with reference to fig. 1, the disposal method of the present invention mainly includes the following process steps:
a. firstly, the collected and transported overhaul residues are discharged into a discharge pit 1.
b. The grab bucket 2 lifts the overhaul slag in the discharge pit 1 into the receiving hopper 3.
c. The receiving hopper 3 uniformly conveys the materials into the crusher 4.
d. The materials crushed by the crusher 4 are conveyed into a rotary feeder 6 by a belt conveyor 5, and the materials are discharged into a tubular pulverizer 7 after being locked by the rotary feeder 6.
e. The tube type pulverizer 7 further grinds the crushed overhaul slag into powdery particles, namely, the powdery material is ground. The tubular pulverizer 7 is filled with a spherical grinding medium to grind the material.
f. The fan 12 supplies wind power to the tube type pulverizer 7, and the pulverized material is selected by the wind power and is taken into the bag type dust collector 11 through a pipeline. The ventilation valve 17 supplies air to the pulverizing system and controls the amount of air entering the tube pulverizer 7.
g. Coarse particles which are not selected by wind power after being ground by the tubular grinder 7 are discharged, conveyed by the rotary blanking device 8, the spiral conveyor 9 and the bucket elevator 10 and then input into the tubular grinder 7 again for repeated grinding.
h. The bag dust collector 11 is a gas-solid separation device and can separate powdery materials in the waste gas.
i. The separated powder material is conveyed to a storage bin 14.
k. The material is discharged from the storage bin 14 to a belt scale 15.
And l, controlling uniform discharging through a belt metering scale 15, and conveying the materials to a cement kiln decomposing furnace 18 through a pneumatic conveying device 16.
And m, arranging a scattering device 17 at a kiln inlet of the cement kiln decomposing furnace 18 to ensure that the materials are uniformly dispersed and enter the kiln.
The invention realizes harmless treatment of the electrolytic aluminum overhaul slag by utilizing the advantages of high temperature, alkaline environment and solid-phase reaction curing heavy metal of the cement kiln. The invention realizes the comprehensive utilization of the overhaul slag by utilizing the characteristics of the raw materials of the cement kiln. The invention realizes that the overhaul slag enters the kiln in a powdery form by adopting the pre-crushing and grinding pretreatment, and better conforms to the characteristics of the cement kiln process. The invention avoids the damage of the aluminum blocks in the overhaul residues to the grinding equipment by the grinding mode of the tubular grinding machine filled with the spherical grinding medium. The tube type pulverizer provided by the invention can separate the aluminum blocks in the overhaul residues to be used as aluminum waste materials by arranging the slag discharge device.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A system for handling solid materials for the electrolysis of aluminium, comprising:
the material receiving and crushing system at least comprises a crushing device, wherein the crushing device receives a solid material containing electrolytic aluminum overhaul residues and crushes the solid material into a crushed material;
the grinding system at least comprises a grinding device communicated with the crushing device, and the grinding device receives the crushed materials and grinds the crushed materials into powdery materials;
and the kiln feeding system at least comprises a first conveying device communicated with the grinding device, and the first conveying device receives the powdery material and conveys the powdery material into a cement kiln decomposing furnace.
2. The disposal system of claim 1, wherein said pulverizing device is a tube mill and is filled with spherical grinding media therein.
3. The disposal system as claimed in claim 2, wherein the pulverizing system further comprises a gas-solid separating device, a blower and a ventilation valve, the gas-solid separating device is communicated with the tube mill through a pipeline, the blower is communicated with the gas-solid separating device, wherein a part of the powdery material in the tube mill can be selected by the wind power of the blower and enters the gas-solid separating device through the pipeline to be separated to obtain a separated powdery material, and the ventilation valve provides wind to the pulverizing system and simultaneously controls the amount of wind entering the tube mill.
4. The disposal system of claim 3, wherein the material receiving and crushing system further comprises a first rotary feeder, a second conveying device for conveying the crushed material is disposed between the first rotary feeder and the crushing device, and the crushed material is discharged into the tube mill after being locked by the first rotary feeder.
5. The handling system of claim 4, wherein the grinding system further comprises a second rotary feeder, a screw conveyor and a bucket elevator, wherein the unselected powder material in the tube mill can be discharged from the tube mill, and is conveyed by the second rotary feeder, the screw conveyor and the bucket elevator to enter the tube mill again for repeated grinding.
6. The disposal system according to claim 5, wherein the crushing device is a crusher, a receiving hopper is arranged above the crusher, the material receiving and crushing system further comprises a discharge pit for receiving the collected and transported solid materials, and a grab bucket is arranged between the discharge pit and the receiving hopper for grabbing the solid materials in the discharge pit into the receiving hopper; and/or the gas-solid separation device is a bag type dust collector; and/or the first conveying device is a pneumatic conveying device.
7. The disposal system of claim 1, 2, 3, 4, 5, or 6, wherein said feeding system further comprises a storage bin disposed after said pulverizing system.
8. The disposal system of claim 7, wherein said kiln inlet system further comprises a metering device for controlling uniform discharge disposed after said storage bin and before said first conveyor.
9. The disposal system as recited in claim 8, wherein said feed entry system further comprises a breaking device for breaking up material disposed at an entry port of said cement kiln decomposition furnace.
10. A method for disposing of solid materials of electrolytic aluminum, characterized in that the solid materials are disposed by the disposal system as claimed in any one of claims 1 to 9, the disposal method comprising:
receiving a solid material containing electrolytic aluminum overhaul residues through a material receiving and crushing system and crushing the solid material into a crushed material;
receiving the crushed material through a grinding system and grinding the crushed material into powdery material;
and receiving the powdery material through a conveying kiln entering system and conveying the powdery material into a cement kiln decomposing furnace.
CN202011245664.6A 2020-11-10 2020-11-10 Treatment system and treatment method for solid material of electrolytic aluminum Pending CN114477811A (en)

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CN202011245664.6A CN114477811A (en) 2020-11-10 2020-11-10 Treatment system and treatment method for solid material of electrolytic aluminum

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Application Number Priority Date Filing Date Title
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CN114477811A true CN114477811A (en) 2022-05-13

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101920219A (en) * 2009-09-10 2010-12-22 孙世林 Powder selection device in mill of dry method ball mill
CN103771737A (en) * 2014-01-22 2014-05-07 南昌大学 Technology of using rice hull powder and anchracite duff as mixed fuel for roasting in rotary cement kiln
CN107401746A (en) * 2017-08-30 2017-11-28 长沙中硅水泥技术开发有限公司 The processing system and its processing method of aluminium electroloysis slag from delining
CN210907355U (en) * 2019-08-16 2020-07-03 宁波诺客环境科技有限公司 Cement kiln system-based disposal device for waste packaging barrels

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101920219A (en) * 2009-09-10 2010-12-22 孙世林 Powder selection device in mill of dry method ball mill
CN103771737A (en) * 2014-01-22 2014-05-07 南昌大学 Technology of using rice hull powder and anchracite duff as mixed fuel for roasting in rotary cement kiln
CN107401746A (en) * 2017-08-30 2017-11-28 长沙中硅水泥技术开发有限公司 The processing system and its processing method of aluminium electroloysis slag from delining
CN210907355U (en) * 2019-08-16 2020-07-03 宁波诺客环境科技有限公司 Cement kiln system-based disposal device for waste packaging barrels

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