CN114812196B - A method for drying packages using waste heat from smelting brown corundum - Google Patents
A method for drying packages using waste heat from smelting brown corundum Download PDFInfo
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- CN114812196B CN114812196B CN202210506475.2A CN202210506475A CN114812196B CN 114812196 B CN114812196 B CN 114812196B CN 202210506475 A CN202210506475 A CN 202210506475A CN 114812196 B CN114812196 B CN 114812196B
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- China
- Prior art keywords
- electrode paste
- silicon carbide
- layer
- material layer
- bag
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- 239000002918 waste heat Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000003723 Smelting Methods 0.000 title claims abstract description 14
- 229910052593 corundum Inorganic materials 0.000 title claims description 19
- 239000010431 corundum Substances 0.000 title claims description 19
- 238000001035 drying Methods 0.000 title claims description 6
- 239000011449 brick Substances 0.000 claims abstract description 49
- 239000002003 electrode paste Substances 0.000 claims abstract description 39
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 32
- 239000002002 slurry Substances 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 239000003779 heat-resistant material Substances 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000001556 precipitation Methods 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000005087 graphitization Methods 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- 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
- F27D5/00—Supports, screens or the like for the charge within the furnace
- F27D5/0068—Containers
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ceramic Products (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The invention discloses a method for baking bags by utilizing waste heat of smelting brown fused alumina, which comprises the following steps: firstly, preparing electrode paste, preparing two manufactured bags and a bag body to be manufactured, preheating the bag body, pouring the electrode paste from an opening, and gradually filling and lining the electrode paste at the bottom of an inner cavity of the bag body; a knotting material layer is circularly built on the cavity wall of the inner cavity, and a silicon carbide brick layer is circularly built on the outer side of the knotting material layer by utilizing a plurality of silicon carbide bricks; the method comprises the steps of clamping a bag body between two bags filled with brown fused alumina, baking electrode paste slurry to form an electrode paste graphitization layer serving as a bag bottom of the bag body, forming a bag wall of the bag body by an inner knotting material layer and an outer silicon carbide brick layer, and finally cooling. The invention utilizes the waste heat of the upper and lower bags filled with brown fused alumina to bake and manufacture the bag body, fully utilizes energy and equipment conditions, and implements the green and environment-friendly production concept.
Description
Technical Field
The invention belongs to the technical field of brown fused alumina ladle receiving, and particularly relates to a method for drying a ladle by utilizing waste heat of smelting brown fused alumina.
Background
Brown fused block is crystallized by mixing three raw materials of high bauxite chamotte, carbon material and scrap iron, adding the raw materials into an electric arc furnace, and cooling after high-temperature melting and impurity reduction, and the smelting process is to reduce main impurities in bauxite by utilizing the basic principle that the affinity of aluminum to oxygen is greater than that of iron, silicon, titanium and the like, and the reduced impurities generate ferrosilicon alloy and are separated from corundum melt, so that brown fused block products are obtained.
The ladle is a key device in the intermittent production process of brown corundum, is a container (similar to a ladle), the smelted brown corundum melt is poured into the ladle and is subjected to processes such as precipitation, cooling and the like in the ladle, the ladle is required to bear strong impact of the high-temperature brown corundum melt, corrosion of ferrosilicon alloy and other chemical elements to a packing material at the temperature is prevented, the working condition is extremely severe, and along with the progress of scientific technology, the growing of the brown corundum smelting equipment is improved increasingly, the automation, pollution-free, low-consumption, long-service life and the like, at present, most of the ladle bottom and the ladle wall of the ladle for brown corundum production are paved by a block of semi-graphite carbon bricks, brick joints are difficult to exist between two adjacent bricks, the brick joints are seriously oxidized, the brick joints are easy to damage, larger cracks are formed over time, the bonding slag is serious, the service life cannot meet the requirements of customers, and particularly the risk of penetrating the brown corundum melt after the ladle bottom and the ladle wall are oxidized.
Disclosure of Invention
The invention aims to provide a method for baking bags by utilizing the waste heat of smelting brown fused alumina, which is environment-friendly, integrates the bag bottom and the bag wall, has no seam, improves the oxidation resistance, avoids the damage of the connected bags, thoroughly solves the problem of serious slag adhesion of the bag bottom and the bag wall, and improves the production quality.
To achieve the above object, the solution of the present invention is: a method for baking ladle by using waste heat of smelting brown alumina comprises the following steps:
S1: firstly, preparing electrode paste, preparing two manufactured bags and a bag body to be manufactured, preheating the bag body to be manufactured, wherein an inner cavity is formed in the bag body, an opening is formed in the top of the inner cavity, and an inner flange is horizontally arranged around the opening;
S2: then pouring electrode paste into the bottom of the inner cavity of the bag body from the opening, and gradually filling and lining the electrode paste on the bottom of the inner cavity of the bag body;
S3: then a knotting material layer is circularly built on the cavity wall of the inner cavity, a silicon carbide brick layer is circularly built on the outer side of the knotting material layer by utilizing a plurality of silicon carbide bricks, and the knotting material layer and the lower part of the silicon carbide brick layer are inserted into the edge part of the electrode paste slurry, so that the edge part of the electrode paste slurry is inwards sunk to form an annular groove;
S4: then pouring the smelted brown fused alumina into two manufactured bags for precipitation, gradually semi-graphitizing the brown fused alumina with waste heat along with the temperature reduction, stacking the bag body to be manufactured above one of the manufactured bags, stacking the other manufactured bag above the bag body to be manufactured, clamping the bag body to be manufactured in the middle by the two manufactured bags, baking the bag body in the middle by the waste heat of the upper bag and the lower bag, baking the electrode paste slurry to form an electrode paste graphitization layer serving as the bag bottom of the bag body, and simultaneously, heating and expanding the inner layer of the electrode paste graphitization layer, wherein the upper part of the silicon carbide brick layer is gradually folded towards the middle and tightly closing the brick joints under the condition that the upper part of the expanded knotting layer is limited by an inner flange and the lower part of the silicon carbide brick layer is supported by the electrode paste graphitization layer; the expanded knotting material layer extrudes the silicon carbide brick layer outwards to continuously push the gap between the silicon carbide brick layer and the ring groove to be tightly closed, so that the knotting material layer on the inner side and the silicon carbide brick layer on the outer side form a bag wall of the bag body together;
S5: and finally unloading the upper and lower packets, and integrally cooling the middle packet body to obtain the seamless packet.
Further, the knotting layer is made of brown corundum fine materials.
Further, the bag receiving body is of a basin-shaped structure with a wide upper part and a narrow lower part, and the bag wall is obliquely arranged along the cavity wall of the inner cavity.
Further, the electrode paste is made of a heat-resistant material.
Further, the heat-resistant material is composed of the following components in percentage by weight: 13-15% of ash, 9-12.0% of volatile matters, 70.5-72.5% of fixed carbon and the balance of water, wherein the water content is at least 0.5%.
After the scheme is adopted, the gain effect of the invention is as follows:
The invention utilizes the waste heat of the upper and lower bags filled with brown fused alumina to bake the bag body to be manufactured, does not need to additionally purchase baking equipment, fully utilizes energy and equipment conditions, implements the environment-friendly production concept, and in addition, the bag bottom is specially designed into a whole electrode paste graphitization layer, so that the bag bottom is integrated and seamless, i.e. the bag bottom has no gap, the package wall is specially designed into a layered structure with an inner layer and an outer layer, and the knotting material layer on the inner side is thermally expanded to extrude the silicon carbide brick layer on the outer side to eliminate brick joints, so that the package wall is more compact, slag can not be adhered to the package, package damage caused by oxidization and oxidation is fundamentally avoided, the service life of the package is prolonged, the production quality of brown fused alumina is higher, overturning is easy, and the production efficiency is faster.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an enlarged schematic view at A in FIG. 1 (schematic view of top variation of the wall covering elimination brick joint);
Fig. 3 is a schematic diagram of the method for baking a bread according to the present invention.
Description of the reference numerals: 1. a bag receiving body; 11. an inner cavity; 12. an inner flange; 2. a bag bottom; 21. a ring groove; 3.a wall wrapping; 31. a knotting material layer; 32. a silicon carbide brick layer; 321. brick joints; 4. the finished bag is connected.
Detailed Description
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
The invention provides a method for baking bags by utilizing waste heat of smelting brown fused alumina, which is shown in figure 1 and comprises the following steps:
s1: firstly, preparing electrode paste, preparing two manufactured bags 4 and a bag body 1 to be manufactured, preheating the bag body 1 to be manufactured, wherein the bag body 1 is provided with an inner cavity 11, an opening is formed in the top of the inner cavity 11, and an inner flange 12 is horizontally arranged around the opening in a surrounding manner in combination with fig. 2;
s2: then pouring electrode paste into the bottom of the inner cavity 11 of the bag body 1 from the opening, and gradually filling and lining the electrode paste on the bottom of the inner cavity 11 of the bag body 1;
S3: then a knotting material layer 31 is circularly built on the wall of the inner cavity 11, a silicon carbide brick layer 32 is circularly built on the outer side of the knotting material layer 31 by utilizing a plurality of silicon carbide bricks, the knotting material layer 31 and the lower parts of the silicon carbide brick layer 32 are inserted into the edge parts of the electrode paste, the edge parts of the electrode paste are inwards sunk to form annular grooves 21, and the inner flange 12 is correspondingly arranged on the tops of the knotting material layer 31 and the silicon carbide brick layer 32;
S4: then pouring the smelted brown fused alumina into the two manufactured bags 4 for precipitation, gradually semi-graphitizing the brown fused alumina with waste heat along with the temperature reduction, stacking the bag body 1 to be manufactured above one of the manufactured bags 4, stacking the other bag 4 above the bag body 1 to be manufactured, clamping the bag body 1 to be manufactured in the middle by the two manufactured bags 4, baking the bag body 1 in the middle by the waste heat of the upper bag 4 and the lower bag 4, forming an electrode paste graphitization layer as a bag bottom 2 of the bag body by baking the electrode paste slurry, simultaneously heating and expanding the inner knotting layer 31, extruding the silicon carbide brick layer 32 outwards by the expanded knotting layer 31, gradually closing the brick joints towards the middle under the conditions that the upper part of the silicon carbide brick layer 32 is limited by the inner flange 12 and the lower part is supported by the electrode paste graphitization layer; the expanded knotting material layer 31 presses the silicon carbide brick layer 32 outwards to continuously push the gap between the silicon carbide brick layer 32 and the ring groove 21 to be tightly closed, so that the knotting material layer 31 on the inner side and the silicon carbide brick layer 32 on the outer side jointly form the wrapping wall of the ladle body 1;
s5: and finally unloading the upper and lower manufactured bags 4, and integrally cooling the middle bag body 1 to obtain the seamless bag.
The brown corundum receiving bag manufactured by the method comprises a receiving bag body 1, a bag bottom 2 and a bag wall 3.
The bag body 1 is of a basin-shaped structure with a wide upper part and a narrow lower part, the bag bottom 2 is an electrode paste graphitized layer which is formed by filling and lining the bottom of the inner cavity 11 with electrode paste and baking, the electrode paste graphitized layer is equivalent to a graphite electrode, has certain conductivity, and the whole layer of electrode paste is simpler in manufacturing process than a half graphite carbon brick paved with a block, and does not have a brick joint 321, so that the problem of slag sticking does not exist at all, damage caused by oxidation of the brick joint 321 is avoided, and the service life of the bag is prolonged.
Furthermore, the covering wall 3 is connected above the edge of the covering bottom 2. The lower part of the wrapping wall 3 is matched with an annular groove 21 embedded in the edge of the wrapping bottom 2, and the wrapping wall 3 is annularly arranged on the inner wall of the inner cavity 11 and is obliquely arranged along the cavity wall of the inner cavity 11.
The bag wall 3 comprises a knotting material layer 31 on the inner side and a silicon carbide brick layer 32 arranged on the outer side of the knotting material layer 31, the knotting material layer 31 is made of brown alumina fine materials, the knotting material layer 31 is clung to the inner wall of the bag body 1, the silicon carbide brick layer 32 is formed by stacking a block of silicon carbide bricks, and the silicon carbide brick layer 32 is clung to the outer side of the knotting material layer 31.
The electrode paste is made of a heat-resistant material, and the heat-resistant material comprises the following components in percentage by weight: 13-15% of ash, 9-12.0% of volatile matter, 70.5-72.5% of fixed carbon, the balance of water, at least 0.5% of water, and the volume density of the electrode paste prepared according to the components is about 1.38t/m 3 and the compressive strength is about 17 Mpa.
The above embodiments are only preferred embodiments of the present invention, and are not limited to the present invention, and all equivalent changes made according to the design key of the present invention fall within the protection scope of the present invention.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210506475.2A CN114812196B (en) | 2022-05-11 | 2022-05-11 | A method for drying packages using waste heat from smelting brown corundum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210506475.2A CN114812196B (en) | 2022-05-11 | 2022-05-11 | A method for drying packages using waste heat from smelting brown corundum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114812196A CN114812196A (en) | 2022-07-29 |
| CN114812196B true CN114812196B (en) | 2024-11-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210506475.2A Active CN114812196B (en) | 2022-05-11 | 2022-05-11 | A method for drying packages using waste heat from smelting brown corundum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114812196B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1236398A (en) * | 1997-06-27 | 1999-11-24 | 奥地利钢铁联合企业阿尔帕工业设备制造公司 | Apparatus and method for producing molten metal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211921345U (en) * | 2019-12-27 | 2020-11-13 | 贵州银星新材料科技有限公司 | A kind of bag receiving device for brown corundum production |
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2022
- 2022-05-11 CN CN202210506475.2A patent/CN114812196B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1236398A (en) * | 1997-06-27 | 1999-11-24 | 奥地利钢铁联合企业阿尔帕工业设备制造公司 | Apparatus and method for producing molten metal |
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| Publication number | Publication date |
|---|---|
| CN114812196A (en) | 2022-07-29 |
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