CN110736350A - Processing technology of electric furnace high-purity alumina hearth - Google Patents
Processing technology of electric furnace high-purity alumina hearth Download PDFInfo
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- CN110736350A CN110736350A CN201911034424.9A CN201911034424A CN110736350A CN 110736350 A CN110736350 A CN 110736350A CN 201911034424 A CN201911034424 A CN 201911034424A CN 110736350 A CN110736350 A CN 110736350A
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- electric furnace
- alumina
- hearth
- purity
- temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
- F27D1/1678—Increasing the durability of linings; Means for protecting
- F27D1/1684—Increasing the durability of linings; Means for protecting by a special coating applied to the lining
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a processing technology of electric furnace high-purity alumina hearth, which comprises the following steps of selecting high-purity superfine alumina powder, placing the high-purity superfine alumina powder into a ball mill, stirring and ball-milling to prepare alumina powder slurry, placing the alumina powder slurry into a spray drying granulation system, screening to obtain alumina particles, placing the alumina particles into an electric furnace hearth mould, carrying out static pressure calcination, polishing the calcined blank electric furnace hearth, and inspecting and packaging the manufactured electric furnace hearth.
Description
Technical Field
The invention relates to the technical field of electric furnace processing and manufacturing, in particular to a processing technology of electric furnace high-purity alumina hearth.
Background
The electric furnace is a universal heating device and can be divided into a box furnace, a tube furnace and a crucible furnace according to the appearance shape, the electric furnace is mainly applied to thermal processing, industrial workpiece treatment, cement and building material industries for thermal processing or treatment of small workpieces, is used for inspection of medicines, pretreatment of medical samples and the like, is used for sample treatment in the fields of water quality analysis, environment analysis and the like, can also be used for petroleum and analysis thereof, is used for measuring moisture, ash content, volatile matter, ash melting point analysis, ash component analysis and element analysis, and can also be used as a universal ashing furnace.
Disclosure of Invention
In order to solve the technical problems, the invention provides a processing technology of an electric furnace high-purity alumina hearth, which has stable quality and ensures the service life of the electric furnace hearth.
processing technology of electric furnace high-purity alumina hearth includes the steps of (1) selecting high-purity superfine alumina powder to be placed into a ball mill, adding pure water, stirring and ball-milling at 110-115 ℃ to obtain alumina powder slurry, (2) placing the alumina powder slurry into a spray drying granulation system, screening at 50-65 ℃ to obtain alumina particles, (3) placing the alumina particles into an electric furnace hearth mold, carrying out static pressure calcination, heating the calcination temperature from normal temperature to 120 ℃ for 12-15 minutes, then heating the calcination temperature from 120-1100 ℃ for 18-22 minutes, keeping the calcination temperature at 1100-1300 ℃, keeping the static pressure applied on the mold at 160-180 MPa, keeping the calcination temperature and pressure for 35-48 minutes, (4) polishing the calcined blank electric furnace hearth, and (5) inspecting and packaging the manufactured electric furnace hearth.
, the step (1) of the processing technology of the electric furnace high-purity alumina hearth selects high-purity superfine alumina powder to be put into a ball mill, and then pure water is added to be stirred and ball-milled at 110 ℃ to prepare alumina powder slurry.
And step , placing the alumina powder slurry into a spray drying granulation system to obtain alumina particles by screening at 55 ℃ in the step (2) of the processing technology of the electric furnace high-purity alumina hearth.
And , putting the alumina particles into a furnace hearth mould of the electric furnace for static pressure calcination, wherein the calcination temperature is increased from normal temperature to 120 ℃ and takes 15 minutes, the calcination temperature is increased from 120-1100 ℃ and takes 20 minutes, the calcination temperature is kept at 1200 ℃, the static pressure applied to the mould is 180MPa, and the calcination temperature and the pressure time are kept at 40 minutes.
Compared with the prior art, the invention has the beneficial technical effects that: the processing technology of the electric furnace high-purity alumina hearth is scientific and reasonable in steps, the performance requirements of the electric furnace hearth are well combined, the thermal shock resistance of the processed electric furnace hearth is good, the hearth collapse in the using process is avoided, and the quality of the processed and manufactured electric furnace is ensured. In addition, the electric furnace hearth processed and manufactured has strong rapid cooling and heating resistance, better corrosion resistance, no crystallization, no slag falling, no pollution and reliable guarantee of the service life of the electric furnace.
Detailed Description
The principles and features of this invention are described below in conjunction with embodiments, which are included to explain the invention and not to limit the scope of the invention.
The processing technology of kinds of electric furnace high-purity alumina hearth comprises the following steps:
(1) selecting high-purity superfine alumina powder, putting the high-purity superfine alumina powder into a ball mill, adding pure water, stirring and ball-milling at the temperature of 110-115 ℃ to prepare alumina powder slurry;
(2) placing the alumina powder slurry into a spray drying granulation system, and screening at 50-65 ℃ to obtain alumina particles;
(3) putting the alumina particles into a hearth die of an electric furnace for static pressure calcination, wherein the time for calcining the alumina particles is 12-15 minutes when the calcining temperature is increased from normal temperature to 120 ℃, then the time for calcining the alumina particles is 18-22 minutes when the calcining temperature is 120-1100 ℃, the calcining temperature is kept at 1100-1300 ℃, the static pressure applied to the die is 160-180 MPa, and the calcining temperature and the pressure are kept for 35-48 minutes;
(4) grinding and polishing the hearth of the calcined blank electric furnace;
(5) and inspecting and packaging the manufactured electric furnace hearth.
In order to make the preparation of the alumina slurry more sufficient. The processing technology of the electric furnace high-purity alumina hearth comprises the steps of (1) selecting high-purity superfine alumina powder to be placed in a ball mill, then adding pure water, stirring and ball-milling at 110 ℃ to prepare alumina powder slurry.
In order to make the alumina particles have better effect. The processing technology of the electric furnace high-purity alumina hearth comprises the step (2) of putting the alumina powder slurry into a spray drying granulation system and screening at 55 ℃ to obtain alumina particles.
In order to ensure that the quality of the processed electric furnace hearth is higher. The processing technology of the electric furnace high-purity alumina hearth comprises the step (3) of putting alumina particles into an electric furnace hearth mould to carry out static pressure calcination, wherein the calcination temperature is increased from normal temperature to 120 ℃ and takes 15 minutes, then the calcination temperature is increased from 120-1100 ℃ and takes 20 minutes, the calcination temperature is kept at 1200 ℃, the static pressure applied to the mould is 180MPa, and the calcination temperature and the pressure are kept for 40 minutes.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1, processing technique of electric furnace high-purity alumina hearth, which is characterized in that the technique comprises the following steps:
(1) selecting high-purity superfine alumina powder, putting the high-purity superfine alumina powder into a ball mill, adding pure water, stirring and ball-milling at the temperature of 110-115 ℃ to prepare alumina powder slurry;
(2) placing the alumina powder slurry into a spray drying granulation system, and screening at 50-65 ℃ to obtain alumina particles;
(3) putting the alumina particles into a hearth die of an electric furnace for static pressure calcination, wherein the time for calcining the alumina particles is 12-15 minutes when the calcining temperature is increased from normal temperature to 120 ℃, then the time for calcining the alumina particles is 18-22 minutes when the calcining temperature is 120-1100 ℃, the calcining temperature is kept at 1100-1300 ℃, the static pressure applied to the die is 160-180 MPa, and the calcining temperature and the pressure are kept for 35-48 minutes;
(4) grinding and polishing the hearth of the calcined blank electric furnace;
(5) and inspecting and packaging the manufactured electric furnace hearth.
2. The process for processing the electric furnace high-purity alumina hearth according to claim 1, characterized in that: and (2) placing high-purity superfine alumina powder into a ball mill, adding pure water, stirring and ball-milling at 110 ℃ to prepare alumina powder slurry.
3. The process for processing the electric furnace high-purity alumina hearth according to the claim 1 or 2, characterized in that: and (2) putting the alumina powder slurry into a spray drying granulation system, and screening at 55 ℃ to obtain alumina particles.
4. The process for processing the electric furnace high-purity alumina hearth according to claim 3, characterized in that: and (3) putting the alumina particles into a hearth mould of an electric furnace for static pressure calcination, wherein the calcination temperature is increased from normal temperature to 120 ℃ and takes 15 minutes, then the calcination temperature is increased from 120-1100 ℃ and takes 20 minutes, the calcination temperature is kept at 1200 ℃, the static pressure applied to the mould is 180MPa, and the calcination temperature and the pressure time are kept at 40 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911034424.9A CN110736350B (en) | 2019-10-29 | 2019-10-29 | Processing technology of high-purity aluminum oxide hearth of electric furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911034424.9A CN110736350B (en) | 2019-10-29 | 2019-10-29 | Processing technology of high-purity aluminum oxide hearth of electric furnace |
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| CN110736350A true CN110736350A (en) | 2020-01-31 |
| CN110736350B CN110736350B (en) | 2021-05-07 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101328073A (en) * | 2008-07-22 | 2008-12-24 | 马鞍山市金马炉业有限责任公司 | Self-reinforcing type ceramic fibre pouring material and preparation thereof |
| CN101921122A (en) * | 2010-08-17 | 2010-12-22 | 河南省耕生高温材料有限公司 | Corundum furnace liner composite and preparation method thereof through isostatic pressing |
| CN103261444A (en) * | 2010-12-17 | 2013-08-21 | 保尔伍斯股份有限公司 | Ceramic bottom lining of a blast furnace hearth |
| CN105424444A (en) * | 2016-01-12 | 2016-03-23 | 中钢集团洛阳耐火材料研究院有限公司 | Refractory material slag-resistant sample and preparation method thereof |
| CN109053172A (en) * | 2018-09-13 | 2018-12-21 | 丁杨洋 | A kind of medium-frequency induction furnace Dry vibrating material and preparation method thereof and application method |
-
2019
- 2019-10-29 CN CN201911034424.9A patent/CN110736350B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328073A (en) * | 2008-07-22 | 2008-12-24 | 马鞍山市金马炉业有限责任公司 | Self-reinforcing type ceramic fibre pouring material and preparation thereof |
| CN101921122A (en) * | 2010-08-17 | 2010-12-22 | 河南省耕生高温材料有限公司 | Corundum furnace liner composite and preparation method thereof through isostatic pressing |
| CN103261444A (en) * | 2010-12-17 | 2013-08-21 | 保尔伍斯股份有限公司 | Ceramic bottom lining of a blast furnace hearth |
| CN105424444A (en) * | 2016-01-12 | 2016-03-23 | 中钢集团洛阳耐火材料研究院有限公司 | Refractory material slag-resistant sample and preparation method thereof |
| CN109053172A (en) * | 2018-09-13 | 2018-12-21 | 丁杨洋 | A kind of medium-frequency induction furnace Dry vibrating material and preparation method thereof and application method |
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| CN110736350B (en) | 2021-05-07 |
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Effective date of registration: 20210419 Address after: 563000 longbaju, Longping Town, Bozhou District, Zunyi City, Guizhou Province Applicant after: GUIZHOU ZUNYI JINSHAN ABRASIVE Co.,Ltd. Address before: 563000 No. 10, Industrial Avenue, Longxi Industrial Park, Yuqing County, Zunyi City, Guizhou Province Applicant before: Guizhou Yunfu electric furnace manufacturing Co.,Ltd. |
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