CN113477678B - Dry deamination method for aluminum ash - Google Patents
Dry deamination method for aluminum ash Download PDFInfo
- Publication number
- CN113477678B CN113477678B CN202110810893.6A CN202110810893A CN113477678B CN 113477678 B CN113477678 B CN 113477678B CN 202110810893 A CN202110810893 A CN 202110810893A CN 113477678 B CN113477678 B CN 113477678B
- Authority
- CN
- China
- Prior art keywords
- deamination
- aluminum
- aluminum ash
- water
- stirring
- 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.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the technical field of aluminum ash innocent treatment, and discloses a dry deamination method for aluminum ash, which comprises the following steps: s1: dissolving, namely adding an ammonia inhibitor in the dissolving process, and uniformly stirring to obtain an aluminum ash water solution; s2: obtaining an aluminum mortar liquid, wherein the mass of water in the aluminum mortar liquid is X; s3: deamination is carried out, aluminum mortar liquid is conveyed into a deamination device, a deamination catalyst is added, the mass of water in the deamination catalyst is Y, stirring and heating are carried out, the heating temperature is 70-150 ℃, the stirring and heating time is 0.5-5 hours, deamination is carried out, ammonia gas generated in the deamination process is collected by an ammonia gas collecting device, dry deaminated aluminum ash is obtained after deamination is finished, and the content of aluminum nitride in the deaminated aluminum ash is less than 1%; the sum of the values of X and Y is controlled to be 104-125% of the mass value of water consumed by the complete reaction of aluminum nitride in aluminum ash. The invention simplifies the process flow, saves the cost and improves the production efficiency.
Description
Technical Field
The invention relates to the technical field of innocent treatment of aluminum ash, in particular to a dry deamination method of aluminum ash.
Background
The main components of the aluminum ash are aluminum nitride, aluminum oxide, salt additives and the like, and a large amount of ammonia gas and heat can be released when meeting water, so that the aluminum ash belongs to dangerous wastes and needs to be subjected to harmless treatment. In order to make the aluminum ash harmless and recycle, deamination of the aluminum ash is required. In the prior art, wet deamination is generally adopted, and aluminum ash is realized by reacting with a large amount of water. However, because ammonia gas is very soluble in water, part of ammonia gas generated by wet deamination is soluble in water, ammonia in the solution needs to be removed by evaporation and oxidation, and the energy consumption and the consumption of an oxidant are high, so that the deamination cost is high.
Patent document 201611266169.7 discloses a method for innocent treatment of aluminum ash, which comprises mixing aluminum ash with more water to remove ammonia, absorbing part of ammonia gas generated in the reaction process by water, and dissolving certain ammonia gas in the water to cause incomplete ammonia removal.
Disclosure of Invention
The invention mainly aims to provide a dry deamination method for aluminum ash, which aims to solve the problems that part of ammonia generated by wet deamination in the prior art is dissolved in water, ammonia in a solution needs to be removed by evaporation and oxidation, the energy consumption is high, the consumption of an oxidant is large, and the deamination cost is high.
In order to achieve the above object, the present invention provides a method for dry deamination of aluminum ash, comprising the steps of:
s1: dissolving
Adding water into a dissolving tank, adding an ammonia inhibitor, stirring uniformly, adding aluminum ash, and stirring to enable the aluminum ash to be fully dissolved, so as to obtain an aluminum ash water solution;
s2: separation
Conveying the aluminum ash water solution to a separation device, and separating out a part of water by the separation device to obtain aluminum ash slurry, wherein the mass of water in the aluminum ash slurry is X;
s3: deamination
Delivering aluminum mortar liquid into a deamination device, adding a deamination catalyst, stirring and heating the aluminum mortar liquid at the temperature of 70-150 ℃ for 0.5-5 hours, and deaminating the aluminum mortar liquid through an AlN+3H220=Al (OH) 3+NH3 reaction, wherein ammonia generated in the deamination process is collected by an ammonia collecting device, and dried deaminated aluminum ash is obtained after deamination, wherein the content of aluminum nitride in the deaminated aluminum ash is less than 1%;
the sum of the values of X and Y is controlled to be 104-125% of the mass value of water consumed by the complete reaction of aluminum nitride in aluminum ash.
Further, in step S3, the deamination catalyst is at a concentration N k:200g/l of circulating mother liquor for alumina production.
Further, in step S3, the deamination reaction is performed under a pressure of 0.01-0.5 MP.
Further, the deamination ware includes sealed container, a controller, one side intercommunication of sealed container has feed arrangement and drum nitrogen device, the bottom side of sealed container is equipped with row material pipe, the inside top of sealed container is equipped with spray set, the inside bottom of sealed container is equipped with stirring heating device, the top intercommunication of sealed container has ammonia collection device, still be equipped with pressure sensor on the sealed container, be connected between pressure sensor and the controller electricity, all be equipped with the control valve between drum nitrogen device and ammonia collection device and the sealed container, the controller is connected with the control valve electricity.
Furthermore, the spraying device and the discharge pipe are provided with control valves, and the control valves are electrically connected with the controller.
Further, the stirring and heating device comprises a stirring rod, and a heater is arranged on the stirring rod.
The beneficial effects of the invention are as follows:
1. according to the method, the dry deamination method is adopted, the content of water in the added materials is controlled, aluminum nitride in aluminum ash can be completely reacted, a small amount of water is evaporated in the deamination process and is released along with ammonia, finally, the dried deaminated aluminum ash can be obtained after the reaction is finished, and the ammonia generated by the reaction is not dissolved in water because of no redundant water, so that the step of removing ammonia in the solution through evaporation and oxidation is omitted, the process flow is simplified, the cost is saved, and the production efficiency is improved.
2. Before the deamination step, the aluminum ash is dissolved and separated to obtain aluminum ash slurry, and then deamination is carried out, so that the deamination reaction is more thoroughly carried out.
3. According to the invention, in the dissolving step, the ammonia inhibitor is added, so that the aluminum ash does not react with water in the dissolving and separating steps, and the ammonia generated by the early reaction is prevented from being dissolved in the water.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 shows a schematic diagram of a process for dry deamination of aluminum ash according to an embodiment of the present invention;
FIG. 2 shows a schematic diagram of a separation apparatus and deamination device according to an embodiment of the present invention;
wherein the above figures include the following reference numerals:
1. closing the container; 2. a pressure sensor; 3. an ammonia gas collection device; 4. a nitrogen-blowing device; 5. a stirring and heating device; 6. a discharge pipe; 7. a spraying device; 8. a feeding device; 9. a separation device.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to fig. 1, 2 in conjunction with examples.
Example 1
According to an embodiment of the present invention, there is provided a method for dry deamination of aluminum ash.
Taking aluminum ash with the aluminum nitride content of 11%, and carrying out the following steps:
s1: dissolving
Adding water into a dissolving tank, adding ammonia inhibitor, stirring uniformly, preparing 200kg of ammonia inhibitor aqueous solution composed of 0.5% acetic acid and 0.1% dimethyl sulfoxide, adding 100kg of aluminum ash, stirring to make the aluminum ash fully dissolved, and obtaining aluminum ash water solution;
s2: separation
Conveying the aluminum ash water solution to a separation device 9, and separating out a part of water by the separation device 9 to obtain aluminum ash slurry with the dry basis water content of 19%;
s3: deamination
Delivering the aluminum mortar liquid into a deamination device, controlling the pressure to be 0.01-0.5MP, adding 35kg of N k:200g/l of circulating mother liquor for alumina production is used as a deamination catalyst, stirring and heating are carried out, the heating temperature is 90 ℃, the stirring and heating time is 2 hours, ammonia gas generated in the deamination process is collected by an ammonia gas collecting device 3, and after deamination is finished, dry deaminated aluminum ash is obtained, and the content of aluminum nitride in the deaminated aluminum ash is 0.32%.
Example 2
According to an embodiment of the present invention, there is provided a method for dry deamination of aluminum ash.
Taking aluminum ash with the aluminum nitride content of 13%, and carrying out the following steps:
s1: dissolving
Adding water into a dissolving tank, adding ammonia inhibitor, stirring uniformly, preparing 200kg of ammonia inhibitor aqueous solution composed of 0.8% N-methyl pyrrolidone, adding 100kg of aluminum ash, and stirring to enable the aluminum ash to be fully dissolved, thus obtaining aluminum ash water solution;
s2: separation
The aluminum ash water solution is conveyed to a separation device 9, and a part of water is separated by the separation device 9 to obtain aluminum ash slurry with the dry basis water content of 23.1%;
s3: deamination
Delivering the aluminum mortar liquid into a deamination device, controlling the pressure to be 0.01-0.5MP, adding 40kg of N k:200g/l of circulating mother liquor for producing aluminum oxide is used as a deamination catalyst, the stirring and heating are carried out, the heating temperature is 100 ℃, the stirring and heating time is 2 hours, ammonia gas generated in the deamination process is collected by an ammonia gas collecting device 3, and after deamination is finished, dry deaminated aluminum ash is obtained, and the content of aluminum nitride in the deaminated aluminum ash is 0.24%.
Example 3
According to an embodiment of the present invention, there is provided a method for dry deamination of aluminum ash.
Taking aluminum ash with 15% of aluminum nitride content, and performing the following steps:
s1: dissolving
Adding water into a dissolving tank, adding ammonia inhibitor, stirring uniformly, preparing 200kg of ammonia inhibitor aqueous solution composed of 1% hexamethylphosphoric triamide and 0.05% citric acid, adding 100kg of aluminum ash, stirring, and fully dissolving the aluminum ash to obtain aluminum ash water solution;
s2: separation
The aluminum ash water solution is conveyed to a separation device 9, and a part of water is separated by the separation device 9 to obtain aluminum ash slurry with the dry basis water content of 23.1%;
s3: deamination
Delivering the aluminum mortar liquid into a deamination device, controlling the pressure to be 0.01-0.5MP, and adding 50kg of N k:200g/l of circulating mother liquor for producing aluminum oxide is used as a deamination catalyst, the stirring and heating are carried out, the heating temperature is 150 ℃, the stirring and heating time is 1.5 hours, ammonia gas generated in the deamination process is collected by an ammonia gas collecting device 3, and after deamination is finished, dry deaminated aluminum ash is obtained, and the content of aluminum nitride in the deaminated aluminum ash is 0.36%.
The equipment for implementing the invention comprises a dissolving tank, a separating device 9 and an ammonia remover which are sequentially arranged, wherein the separating device 9 comprises a centrifugal machine, the ammonia remover comprises a feeding device 8, a controller and a closed container 1, one side of the closed container 1 is communicated with the feeding device 8 and a nitrogen blowing device 4, the bottom side of the closed container 1 is communicated with a discharging pipe 6, the top of the closed container 1 is provided with a pressure sensor 2, the top of the closed container 1 is communicated with an ammonia collecting device 3, the top of the interior of the closed container 1 is provided with a spraying device 7, the bottom of the interior of the closed container 1 is provided with a stirring heating device 5, the stirring heating device 5 comprises a stirring rod, a heater is arranged on the stirring rod, the arrangement of the heater can accelerate the reaction, a control valve is arranged between the nitrogen blowing device 4 and the ammonia collecting device 3 and the closed container 1, and the controller is electrically connected with the control valve. The controller controls the control valves of the nitrogen blowing device 4 and the ammonia collecting device 3 by receiving the pressure data transmitted by the pressure sensor, and blows nitrogen into the closed container 1 or discharges ammonia to ensure that the pressure in the closed container 1 is within a set range.
Control valves are arranged on the spraying device 7 and the discharge pipe 6, and a control valve is also arranged between the separation equipment 9 and the feeding equipment 8, and the control valves are electrically connected with a controller.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A method for dry deamination of aluminum ash, comprising the steps of:
s1: dissolving
Adding water into a dissolving tank, adding an ammonia inhibitor, stirring uniformly, adding aluminum ash, and stirring to enable the aluminum ash to be fully dissolved, so as to obtain an aluminum ash water solution;
s2: separation
Conveying the aluminum ash water solution to a separation device, and separating out a part of water by the separation device to obtain aluminum ash slurry, wherein the mass of water in the aluminum ash slurry is X;
s3: deamination
Delivering aluminum mortar liquid into a deamination device, adding a deamination catalyst, stirring and heating the aluminum mortar liquid at the temperature of 70-150 ℃ for 0.5-5 hours, and deaminating the aluminum mortar liquid through an AlN+3H220=Al (OH) 3+NH3 reaction, wherein ammonia generated in the deamination process is collected by an ammonia collecting device, and dried deaminated aluminum ash is obtained after deamination, wherein the content of aluminum nitride in the deaminated aluminum ash is less than 1%;
the sum of the values of X and Y is controlled to be 104-125% of the mass value of water consumed by the complete reaction of aluminum nitride in aluminum ash.
2. The method according to claim 1, wherein in the step S3, the deamination catalyst is a catalyst having a concentration of N k:200g/l of circulating mother liquor for alumina production.
3. The method for dry deamination of aluminum ash according to claim 1, wherein the deamination reaction is performed under a pressure of 0.01-0.5MP in the step S3.
4. The dry deamination method of aluminum ash according to claim 1, wherein the deamination device comprises a closed container and a controller, wherein one side of the closed container is communicated with a feeding device and a nitrogen blowing device, a discharging pipe is arranged at the bottom side of the closed container, a spraying device is arranged at the top of the interior of the closed container, a stirring and heating device is arranged at the bottom of the interior of the closed container, an ammonia collecting device is communicated with the top of the closed container, a pressure sensor is further arranged on the closed container, the pressure sensor is electrically connected with the controller, a control valve is arranged between the nitrogen blowing device and the ammonia collecting device, and the closed container, and the controller is electrically connected with the control valve.
5. The method for dry deamination of aluminum ash according to claim 4, wherein the spraying device and the discharging pipe are provided with control valves, and the control valves are electrically connected with the controller.
6. The method for dry deamination of aluminum ash according to claim 4, wherein the stirring and heating device comprises a stirring rod provided with a heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110810893.6A CN113477678B (en) | 2021-07-19 | 2021-07-19 | Dry deamination method for aluminum ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110810893.6A CN113477678B (en) | 2021-07-19 | 2021-07-19 | Dry deamination method for aluminum ash |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113477678A CN113477678A (en) | 2021-10-08 |
| CN113477678B true CN113477678B (en) | 2023-05-30 |
Family
ID=77941250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110810893.6A Active CN113477678B (en) | 2021-07-19 | 2021-07-19 | Dry deamination method for aluminum ash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113477678B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116140339B (en) * | 2023-01-03 | 2023-10-31 | 秦皇岛信能能源设备有限公司 | High-efficiency deamination treatment equipment and method for secondary aluminum ash |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09194960A (en) * | 1995-11-07 | 1997-07-29 | Arutetsuku Amino Kk | Treatment of aluminum residual ash |
| CN204508826U (en) * | 2015-03-20 | 2015-07-29 | 洛阳金石再生资源开发有限公司 | A kind of aluminium ash treatment system produced for corundum |
| CN104692430B (en) * | 2015-03-20 | 2016-07-06 | 洛阳金石再生资源开发有限公司 | A kind of aluminum ash treatment system produced for corundum |
| CN106830030B (en) * | 2017-02-22 | 2018-06-08 | 中南大学 | A kind of method using the safe and efficient production sandy alumina of aluminium ash |
| CN107262501B (en) * | 2017-07-07 | 2020-03-03 | 南通大学 | Reaction device for removing nitrogen from aluminum ash and nitrogen removal system |
| CN109746249A (en) * | 2019-01-22 | 2019-05-14 | 湖南绿脉环保科技有限公司 | A kind of aluminium ash deamination method |
| CN112170465A (en) * | 2020-10-27 | 2021-01-05 | 湖南绿脉环保科技股份有限公司 | Aluminum ash deamination device |
-
2021
- 2021-07-19 CN CN202110810893.6A patent/CN113477678B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113477678A (en) | 2021-10-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109277398B (en) | Safe and harmless treatment method for aluminum ash | |
| PL194720B1 (en) | Process for treating flue gas | |
| CN113477678B (en) | Dry deamination method for aluminum ash | |
| CN105399116A (en) | System for treating waste acid with organic matters and treatment method and application of system | |
| CN105238432A (en) | Method and device for preparing high-quality bio-oil and white carbon black through self-heating acid pickling-pyrolysis-combustion integration | |
| CN114733502A (en) | Regeneration treatment process for titanium dioxide carrier raw material of waste reduction denitration catalyst in wide temperature range | |
| CN111807332B (en) | High-efficiency method and device for preparing sulfuric acid from coking plant desulfurization waste liquid | |
| CN113828117B (en) | Melamine discharging waste gas treatment and recycling system and method | |
| CN214160832U (en) | Solid waste treatment system | |
| WO2011120279A1 (en) | Intelligent subcritical water resource treatment system and method of organic solid waste | |
| CN110836596B (en) | Method for utilizing waste heat in tube bundle drying process and application thereof | |
| CZ2013749A3 (en) | Recycling method of waste aluminium and apparatus for making the same | |
| CN212817789U (en) | Fly ash removes ammonium system with preheating device | |
| JP2867240B2 (en) | Method and apparatus for producing zeolite | |
| CN210420096U (en) | Arsenic alkali residue resource utilization equipment | |
| CN220144328U (en) | Electrolytic manganese slag circulating alkali washing harmless treatment system | |
| CN111908489A (en) | Feed additive sodium bicarbonate system and process thereof | |
| CN114477166B (en) | Preparation process of expandable graphite | |
| CN115121109B (en) | Low NOXSystem and process for flue gas denitration and auxiliary desulfurization treatment of escaped ammonia | |
| CN217110220U (en) | Energy-saving titanium dioxide flash drying system | |
| CN217698442U (en) | Yellow phosphorus tail gas treatment system | |
| CN214973026U (en) | Flue gas desulfurization denitration and excess sludge integrated treatment equipment | |
| CN214665866U (en) | Energy-saving and consumption-reducing conveying device | |
| CN102639452B (en) | Method for drying sludge | |
| CN110040687B (en) | Waste cathode carbon block treatment system and treatment method thereof |
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 | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230509 Address after: 256200 Huixian 1st Road, Binzhou Economic Development Zone, Shandong Province Applicant after: SHANDONG HONGQIAO NEW MATERIAL Co.,Ltd. Address before: 256200 south side of Huixian 1st Road, economic development zone, Zouping County, Binzhou City, Shandong Province (room 1403, aluminum building) Applicant before: Shandong Weiqiao Changlong Environmental Protection Technology Co.,Ltd. Applicant before: SHANDONG HONGQIAO NEW MATERIAL Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |