CN113324868A - Method for evaluating oxidizing property of magnetite - Google Patents
Method for evaluating oxidizing property of magnetite Download PDFInfo
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- CN113324868A CN113324868A CN202110541169.8A CN202110541169A CN113324868A CN 113324868 A CN113324868 A CN 113324868A CN 202110541169 A CN202110541169 A CN 202110541169A CN 113324868 A CN113324868 A CN 113324868A
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- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000001590 oxidative effect Effects 0.000 title claims description 10
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 99
- 230000003647 oxidation Effects 0.000 claims abstract description 97
- 239000000843 powder Substances 0.000 claims abstract description 28
- 230000008569 process Effects 0.000 claims abstract description 20
- 239000008188 pellet Substances 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 230000004584 weight gain Effects 0.000 claims description 8
- 235000019786 weight gain Nutrition 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000005453 pelletization Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 22
- 229910052742 iron Inorganic materials 0.000 abstract description 10
- 238000011156 evaluation Methods 0.000 abstract description 5
- 238000005054 agglomeration Methods 0.000 abstract description 4
- 230000002776 aggregation Effects 0.000 abstract description 4
- 238000012512 characterization method Methods 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 abstract description 2
- 238000004458 analytical method Methods 0.000 abstract 1
- 230000000977 initiatory effect Effects 0.000 abstract 1
- 238000002411 thermogravimetry Methods 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000009795 derivation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Compounds Of Iron (AREA)
Abstract
The invention belongs to the field of iron ore powder agglomeration, and particularly relates to a method for evaluating the oxidation performance of magnetite, wherein thermogravimetric experiment analysis is utilized to obtain TG-DTG data of the oxidation process of the magnetite, and then an evaluation system of the oxidation performance of the magnetite is extracted, wherein the evaluation system defines three characteristic temperatures of the oxidation process of the magnetite: oxidation initiation temperature TiQuick oxidation temperature TfAnd oxidation termination temperature Te，The comprehensive oxidation characteristic index S is providedoAnd a computational characterization method thereof. On one hand, the oxidation difficulty and the oxidation performance of different types of magnetite can be effectively and quantitatively evaluated, on the other hand, theoretical support can be provided for optimization and regulation of process system parameters in the pellet preheating roasting process according to the magnetite oxidation characteristic temperature defined by an evaluation system, and the technical progress of high-quality iron ore oxidized pellet production is promoted.
Description
Technical Field
The invention relates to the field of iron ore powder agglomeration, in particular to a method for evaluating the oxidizing property of magnetite.
Background
At present, iron-containing furnace burden used for blast furnace iron making in China is approximately 70% of sintered ore and 30% of pellet ore and lump ore, so that sintering is the most main iron ore agglomeration process in China for a long time. However, in recent years, with the national industrial transformation and the increasingly severe environmental protection requirements, the pellet process with lower energy consumption, lower pollution and lower emission becomes the key point for the development of iron-containing furnace charges of blast furnaces, and accordingly, the production of high-quality pellet ore and the high-pellet-ratio smelting technology become hot spots in the current metallurgical industry. The production of iron ore pellets generally uses finely ground magnetite, the mechanism of which is Fe3O4Oxidation to Fe2O3，Fe2O3The recrystallization and consolidation among crystal grains are finished into ore, and the oxidation process of the magnetite has important influence on the continuous crystal consolidation of the hematite and the quality of pellet ore. However, the existing forms of iron oxide in iron ore raw materials and mineral powder in nature are greatly different, domestic magnetite generally contains gangue components with different types and contents, and different magnetite shows obvious difference in the process of preparing oxidized pellets. The production of high-quality pellets needs to pay attention to the oxidation characteristics of different magnetite and is taken as the basis for ore species selection, preheating and roasting system regulation, while the existing pellet production is more concentrated on the continuous crystallization process, the research on the oxidation behavior of the magnetite is relatively less, and an evaluation system and a standard for the oxidation performance of the magnetite are not formed so as to guide the production of the high-quality pellets.
Disclosure of Invention
The invention discloses a method for evaluating the oxidizing property of magnetite, which aims to solve any of the technical problems and other potential problems in the prior art.
In order to solve the technical problems, the technical scheme of the invention is as follows: a method for evaluating the oxidizing property of magnetite comprises the following experimental steps:
firstly, drying magnetite powder in an oven for a period of time to remove free water in the magnetite powder;
secondly, fine grinding and screening magnetite powder to ensure that the granularity of the magnetite powder is suitable for agglomeration and pelletizing;
thirdly, weighing 50mg of sample, placing the sample in an alumina crucible, and then placing the alumina crucible in a microcomputer differential thermal balance;
fourthly, the microcomputer differential thermal balance heats for a period of time from room temperature by raising the temperature, and automatically acquires data;
fifthly, calculating a DTG curve of the magnetite oxidation process according to TG data;
sixth, the defined oxidation onset temperature (T) is calculated from the TD-DTG curvei) Rapid oxidation temperature (T)f) Oxidation termination temperature (T)e)；
Seventhly, calculating to obtain the comprehensive oxidation characteristic index S of the magnetite based on the oxidation temperature characteristic valueoTo show the oxidation performance of magnetite.
The magnetite in the step one refers to natural magnetite used for pelletizing and synthetic magnetite (Fe)3O4) It can contain different kinds of gangue, and the proportion of the granularity of the magnetite powder after fine grinding to be 74 μm is 70-95%.
The drying conditions in the second step are 105 ℃ and 24 hours, and any drying conditions which can remove physical water under the condition of not influencing chemical components can be adopted.
The heating rate of the microcomputer balance in the fourth step is 5 ℃/min, the heating atmosphere is air, the temperature control precision is 0.01 ℃, and the highest temperature is increased to 1000-1200 ℃.
In the sixth step, an oxidation start temperature T is definediThe fast oxidation temperature T is defined as the temperature at which the initial horizontal tangent of the TG curve intersects the 45 DEG tangentfIn order to obtain the temperature corresponding to the peak value of the oxidation weight gain rate, namely the temperature corresponding to the peak value of the DTG curve, a plurality of rapid oxidation temperature values can be provided in one oxidation, and the oxidation termination temperature T is definedeThe temperature at which the oxidative weight gain on the TG curve reached a final total weight gain of 95%.
The comprehensive oxidation characteristic index S defined in the step sevenoDirectly characterizes the degree of difficulty of magnetite oxidation, and the larger value indicates that the magnetite is difficult to oxidizeThe better the magnetite oxidation performance is, the derivation process and the calculation characterization method are as follows:
the oxidation rate is expressed in the Arrhenius equation:
derivation of T is performed on both sides of formula (1):
bringing (1) into (2):
when oxidation begins to occur, T ═ Ti：
Further finishing (4):
thus, the formula (5) is simplified to obtain the comprehensive oxidation characteristic index So：
Wherein, (dW/dt)maxIndicates the maximum oxidation rate, (dW/dt)meanThe average oxidation rate is indicated.
The invention has the beneficial effects that: due to the adoption of the technical scheme, the method provided by the invention has the advantages that the three characteristic temperatures of the magnetite oxidation process are defined: oxidation onset temperature (T)i) Rapid oxidation temperature (T)f) Oxygen, oxygenTransition termination temperature (T)e) And an index of comprehensive oxidation characteristics SoThe method can effectively and quantitatively evaluate the oxidation difficulty and the oxidation performance of different types of magnetite, can provide theoretical support for the optimization and regulation of a pellet preheating roasting process system according to the oxidation characteristic temperature of the magnetite, and can promote the production of high-quality oxidized pellets.
Drawings
FIG. 1 is a flow chart of a method for evaluating the oxidation performance of magnetite according to the present invention.
Detailed Description
The technical solution of the present invention is further described with reference to the following specific embodiments.
As shown in fig. 1, the method for evaluating the oxidation performance of magnetite according to the present invention is characterized by specifically comprising the following steps:
s1) drying magnetite powder to remove free water in the magnetite powder;
s2) carrying out fine grinding and screening on the dried magnetite powder;
s3) weighing the magnetite powder processed in the step S2) to perform differential thermal test, acquiring TG data and obtaining a TG curve;
s4) calculating the magnetite oxidation process according to the TG data to obtain a DTG curve;
s5) determining an oxidation temperature characteristic value according to the TG-DTG curve;
s6) calculating to obtain the comprehensive oxidation characteristic index S of the magnetite according to the characteristic value of the oxidation temperatureo。
The magnetite in S1) includes natural magnetite or synthetic magnetite (Fe) for pelletizing3O4)。
The proportion of the granularity of the magnetite powder after the fine grinding in the S2) to 74 mu m is 70-95%.
The S3) comprises the following specific steps:
s3.1) putting magnetite powder into an oxidation crucible, putting the oxidation crucible into a microcomputer balance,
s3.2) heating the microcomputer balance at the heating rate of 2-10 ℃/min in the atmosphere of air to 1000-1200 ℃,
s3.3) obtaining TG data.
And in the temperature rise process in the S3.2), the temperature control precision is 0.01 ℃.
The S4) comprises the following specific steps:
s4.1) carrying out differential calculation according to the TG data obtained in S3.3) to obtain DTG data,
and S4.2) drawing a curve according to the obtained DTG data to obtain a DTG curve.
The S5) comprises the following specific steps:
s5.1) defining the temperature at the intersection of the initial horizontal tangent and the 45 DEG tangent of the TG curve as the oxidation onset temperature Ti，
S5.2) defining the temperature value corresponding to the peak value of the DTG curve as the quick oxidation temperature Tf，
S5.3) defining the temperature value on the TG curve when the oxidation weight gain reaches 95 percent of the final total weight gain as the oxidation termination temperature Te。
The S6) comprises the following specific steps:
s6.1) Oxidation Start temperature T obtained in S5.3)iQuick oxidation temperature TfAnd oxidation termination temperature TeSubstituting into formula (6) to obtain comprehensive oxidation characteristic index SoThe disclosure is as follows:
in the formula:
according to the oxidation start temperature TiQuick oxidation temperature TfAnd oxidation termination temperature TeThe specific characteristic temperature value of the magnetite oxidation process can be determined, and the regulation and control of the preheating roasting temperature in the pellet production process can be guided; according to the obtained comprehensive oxidation characteristic index SoCan characterize the difficulty of magnetite oxidation, SoThe larger the value, the more excellent the magnetite oxidizing property.
Example (b): detection and evaluation of oxidation performance of different magnetite ores
Drying six kinds of magnetite powder in oven at 105 deg.C for 24 hr to remove the powderThe bulk water of (1); then, respectively grinding the dried 6 kinds of iron ore powder until the granularity is less than 74 microns; weighing 50mg of each magnetite powder and placing the magnetite powder in an alumina crucible; when each group of experiments are carried out, an alumina crucible containing the magnetite powder is placed in a microcomputer differential thermal balance; setting the heating rate of a differential thermal balance to be 5 ℃/min, the heating range to be 25-1000 ℃, and introducing air atmosphere; after the experiment is finished, weight gain TG data in the oxidation process are led out, DTG data are calculated in a differential mode, and the oxidation starting temperature T is calculated according to the definition of the characteristic temperature in the oxidation processiQuick oxidation temperature TfOxidation termination temperature TeAnd calculating the comprehensive oxidation characteristic index S of each magnetite powder according to a comprehensive oxidation characteristic index formulaoThe value is obtained. The values of the oxidation characteristic parameters of the 6 magnetite powders obtained are shown in table 1. According to the comprehensive oxidation characteristic index value, the oxidation performances of the 6 magnetite powders are from good to bad: 1#>4#>3#>2#>5#>6#。
Table 1 shows the oxidation characteristic parameters of 6 different magnetite ores
The method for evaluating the oxidizing property of magnetite provided in the embodiments of the present application is described in detail above. The above description of the embodiments is only for the purpose of helping to understand the method of the present application and its core ideas; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
As used in the specification and claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the application as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.
Claims (8)
1. The method for evaluating the oxidizing property of the magnetite is characterized by comprising the following steps:
s1) drying magnetite powder to remove free water in the magnetite powder;
s2) carrying out fine grinding and screening on the dried magnetite powder;
s3) weighing the magnetite powder processed in the step S2) to perform differential thermal test, acquiring TG data and obtaining a TG curve;
s4) calculating the magnetite oxidation process according to the TG data, obtaining DTG data and finally obtaining a DTG curve;
s5) determining an oxidation temperature characteristic value according to the TG-DTG curve;
s6) calculating to obtain the comprehensive oxidation characteristic index S of the magnetite according to the characteristic value of the oxidation temperatureo。
2. The method of claim 1, wherein the magnetite in S1) comprises natural magnetite or synthetic magnetite for pelletizing.
3. The method as claimed in claim 1, wherein the ratio of the size of the finely ground magnetite powder in S2) to 74 μm is 70% to 95%.
4. The method as claimed in claim 1, wherein the specific steps of S3) are:
s3.1) putting magnetite powder into an oxidation crucible, putting the oxidation crucible into a microcomputer balance,
s3.2) heating the microcomputer balance at the heating rate of 2-10 ℃/min in the atmosphere of air to 1000-1200 ℃,
s3.3) obtaining TG data.
5. The method according to claim 4, wherein the temperature control precision in the temperature raising process in S3.2) is 0.01 ℃.
6. The method as claimed in claim 4, wherein the specific steps of S4) are as follows:
s4.1) carrying out differential calculation according to the TG data obtained in S3.3) to obtain DTG data,
and S4.2) drawing a curve according to the obtained DTG data to obtain a DTG curve.
7. The method as claimed in claim 5, wherein the specific steps of S5) are as follows:
s5.1) defining the temperature at the intersection of the initial horizontal tangent and the 45 DEG tangent of the TG curve as the oxidation onset temperature Ti，
S5.2) defining the temperature value corresponding to the peak value of the DTG curve as the rapid oxidation temperature Tf，
S5.3) defining the temperature value on the TG curve when the oxidation weight gain reaches 95 percent of the final total weight gain as the oxidation termination temperature Te。
8. The method as claimed in claim 5, wherein the specific steps of S6) are as follows:
s6.1) Oxidation Start temperature T obtained by mixing S5.1), S5.2) and S5.3)iQuick oxidation temperature TfAnd oxidation termination temperature TeSubstituting into the following formula (6) to obtain the comprehensive oxidation characteristic index SoThe disclosure is as follows:
in the formula: (dW/dt)maxFor maximum oxidation rate, (dW/dt)meanIn order to obtain an average oxidation rate,
s6.2) depending on the oxidation start temperature TiQuick oxidation temperature TfAnd oxidation termination temperature Te，The specific characteristic temperature value in the magnetite oxidation process can be determined, and the regulation and control of the preheating roasting temperature in the pellet production process can be guided; according to the obtained comprehensive oxidation characteristic index SoCan characterize the difficulty of magnetite oxidationDegree of easiness, SoThe larger the value, the more excellent the magnetite oxidizing property.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809579A (en) * | 2012-07-23 | 2012-12-05 | 辽宁科技大学 | Method for detecting high-temperature mineralization characteristic of sintered iron ores |
| CN107764681A (en) * | 2017-10-16 | 2018-03-06 | 深圳市贝特瑞新能源材料股份有限公司 | A kind of fast appraisement method of burnt raw material |
| CN108519301A (en) * | 2018-03-12 | 2018-09-11 | 沈阳环境科学研究院 | It is a kind of to utilize thermogravimetric analyzer evaluation coal and the reactive method of biomass char |
| CN110793891A (en) * | 2019-10-18 | 2020-02-14 | 江苏大学 | Quantitative evaluation method for pyrolysis activation energy of diesel engine classified particles |
| CN111238992A (en) * | 2020-02-27 | 2020-06-05 | 南京师范大学 | Quasi-magnetocaloric reanalysis method for researching thermal stability of magnetic material in composite material |
-
2021
- 2021-05-18 CN CN202110541169.8A patent/CN113324868A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809579A (en) * | 2012-07-23 | 2012-12-05 | 辽宁科技大学 | Method for detecting high-temperature mineralization characteristic of sintered iron ores |
| CN107764681A (en) * | 2017-10-16 | 2018-03-06 | 深圳市贝特瑞新能源材料股份有限公司 | A kind of fast appraisement method of burnt raw material |
| CN108519301A (en) * | 2018-03-12 | 2018-09-11 | 沈阳环境科学研究院 | It is a kind of to utilize thermogravimetric analyzer evaluation coal and the reactive method of biomass char |
| CN110793891A (en) * | 2019-10-18 | 2020-02-14 | 江苏大学 | Quantitative evaluation method for pyrolysis activation energy of diesel engine classified particles |
| CN111238992A (en) * | 2020-02-27 | 2020-06-05 | 南京师范大学 | Quasi-magnetocaloric reanalysis method for researching thermal stability of magnetic material in composite material |
Non-Patent Citations (4)
| Title |
|---|
| 方嘉 等: "来流参数对炭黑颗粒氧化特性影响", 《工程热物理学报》 * |
| 曾幸荣 等: "《高分子近代测试分析技术》", 31 May 2007, 华南理工大学出版社 * |
| 王宝海: "磁铁矿球团氧化非等温动力学", 《2010年全国炼铁生产技术会议暨炼铁学术年会文集（上）》 * |
| 陈许玲 等: "钒钛磁铁矿球团氧化焙烧行为和固结特性", 《中南大学学报(自然科学版)》 * |
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Application publication date: 20210831 |