CN109068433A - A kind of furnace of calcium carbide electrode seals - Google Patents
A kind of furnace of calcium carbide electrode seals Download PDFInfo
- Publication number
- CN109068433A CN109068433A CN201811057573.2A CN201811057573A CN109068433A CN 109068433 A CN109068433 A CN 109068433A CN 201811057573 A CN201811057573 A CN 201811057573A CN 109068433 A CN109068433 A CN 109068433A
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- high temperature
- furnace
- calcium carbide
- temperature fiber
- prefabricated component
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B7/00—Heating by electric discharge
- H05B7/02—Details
- H05B7/12—Arrangements for cooling, sealing or protecting electrodes
-
- 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
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
- F27D11/08—Heating by electric discharge, e.g. arc discharge
- F27D11/10—Disposition of electrodes
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Details (AREA)
Abstract
The invention discloses a kind of furnace of calcium carbide electrode seals, including are located on bell and seal refractory material around electrode column upper layer and lower layer, and lower layer seals the corundum prefabricated component that refractory material is two pieces of combination of the above, and it is high temperature fiber fabric swatch that upper layer, which seals refractory material,；Described one layer of hauberk of high temperature fiber fabric swatch outer cladding, hauberk is in contact with electrode column, effectively graphite electrode is prevented to contact with high temperature fiber cloth direct friction, service life is obviously prolonged, lower layer replaces high temperature fiber cloth using corundum prefabricated component, wear-resisting property and high temperature resistance significantly improve, service life is further obviously prolonged, corundum prefabricated component of the present invention has high abrasion, high intensity, excellent thermal shock resistance, low Fe content provides guarantee for lift-off seal material bulk life time but also it has highly resistance CO erosion performance.
Description
Technical field
The present invention relates to a kind of furnace of calcium carbide electrode seals, belong to sealing heat-proof device field.
Background technique
Calcium carbide is important basic chemical industry product, in recent years with the continuous soaring and petroleum deep processed product of international oil price at
This continuous rise, generated by polyvinyl chloride by calcium carbide and other calcium carbide downstream industries have faster development, calcium carbide demand and production capacity
Increasingly increase, the furnace of calcium carbide equipment technology level of China's calcium carbide industry is promoted to have also been greatly improved.The electric energy in furnace of calcium carbide
It is transformed into thermal energy, makes the carbon of carbon raw that complicated physicochemical change occur with the calcium in quick lime and synthesize calcium carbide, furnace of calcium carbide
The safety in production and good quality and high output that guarantee calcium carbide are had a very important significance.
Furnace of calcium carbide is heated using electrode column, and there are gaps bell after bell insertion furnace of calcium carbide for electrode column, must
It must be closed using sealing element, to prevent outside air from entering furnace of calcium carbide or furnace gas leaks etc. causes damages, even
Occur dangerous.Qinghai Salt Lake Mei Ye Co., Ltd is introduced from abroad that the world is first largest, the state-of-the-art furnace of calcium carbide of technology,
Each furnace of calcium carbide is heated using six electrodes column, and sealing element between electrode column and bell is arranged on bell, using from state
The high-temperature fibre cloth of outer introduction seals, upper layer and lower layer design.Since electrode column needs often to press according to the technological requirements, measurement
Electrode column need to be promoted when electrode tip length, it is so serious with the friction of the high temperature fiber cloth of sealing, so that high temperature fiber cloth breakage needs
It often to replace, but high temperature fiber cloth involves great expense, use cost is very high, and seeking alternative materials is reality urgently to be solved
Problem.
Fig. 1 is furnace of calcium carbide burner hearth schematic diagram, there is bell 7 on burner hearth, six electrodes column 6, and 1 and 2 be upper layer and lower layer in figure
Sealing material.In the prior art, upper layer 1 and lower layer 2 are high temperature fiber cloth, are formed a circle around graphite electrode (by several valves
Composition), but in actually using, with electrode column friction badly broken, service life is short；Especially lower layer 2 and pass through bell
It is contacted with hot-fluid in furnace of calcium carbide, for maximum temperature up to 1100 DEG C, and in high concentration CO environment, service life is shorter.
Summary of the invention
It is good the technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide a kind of wear-resisting property, it uses
The furnace of calcium carbide electrode seals of service life length.
In order to solve the above-mentioned technical problem, the invention discloses a kind of furnace of calcium carbide electrode seals, including are located at bell
Upper to seal refractory material around graphite electrode upper layer and lower layer, it is prefabricated that lower layer seals the corundum that refractory material is two pieces of combination of the above
The high temperature fiber fabric swatch that refractory material is two pieces of combination of the above is sealed on part, upper layer；One layer of lock of the high temperature fiber fabric swatch outer cladding
First, hauberk are directly contacted with electrode column, and electrode column and high temperature fiber cloth are separated, and are avoided direct contact with and are caused friction damaged.
Wherein, the side of the corundum prefabricated component is oppositely arranged boss and groove, two blocks of adjacent corundum prefabricated components
It is caught in by the boss of one of prefabricated component in the groove of another block of prefabricated component and completes linking sealing, several piece corundum prefabricated component
A circular ring shape is enclosed, and graphite electrode is enclosed in middle part；In such a way that head and the tail enclose, so that corundum prefabricated component is formed
The structure that one entirety encloses is difficult individually laterally to detach a certain piece therein, thus more stable.
The substrate of the high temperature fiber fabric swatch is steel plate, and steel plate is equipped with high temperature fiber cloth, the high temperature fiber on one side
Ceramic beaverboard is coated in cloth；Two pieces or more high temperature fiber fabric swatch enclose a circular ring shape jointly, and electrode column is enclosed in
Middle part, and the one side equipped with high temperature fiber cloth is in contact with corundum prefabricated component.
The corundum prefabricated component includes the component of following mass percent:
Aggregate:
Powder:
The sum of the above aggregate and powder are 100%；
The water-reducing agent of the additional above component quality summation 0.1-0.2% and the water of 4-7%, and nano powder in the above component
The dispersing agent of body gross mass 0.5-2%.
In above-mentioned component, three kinds of nano-powders all play acceleration of sintering, in addition to this, introduce titanic oxide nano
It is to improve thermal shock resistance to promote to form aluminium titanates in matrix when high temperature；Introducing silica nanometer powder is to promote base
Matter forms more mullite phases, improves intensity and thermal shock resistance；Introducing SiC nano-powder is mainly the resistance to of raising matrix
Grind performance and thermal shock resistance energy.
Wherein, the water-reducing agent is amino-sulfonic acid-base high performance water-reducer.
The dispersing agent is anionic surfactant neopelex and gum arabic according to mass ratio
The mixture of 1:2 mixing.
Above-mentioned corundum prefabricated component is prepared using following steps:
Step 1: dispersing agent and water-reducing agent are poured into water and are stirred, it is spare to be configured to mixed liquor；
Step 2: aggregate and powder are uniformly mixed, and the mixed liquor in step 1 is added, is again stirring for mixing；
Step 3: the slurry that step 2 mixes is poured into mold, is formed after jolt ramming；
Step 4: being demoulded after air-set, is placed in constant-temp. and-moisture maintenance and is conserved 3 days；
Step 5: the brick body conserved is after drying to obtain the final product.
In step 4, the curing condition of the constant-temp. and-moisture maintenance is temperature between 20~25 DEG C, humidity >=90%.
In step 5, the temperature of the drying is 110~200 DEG C.
The utility model has the advantages that
1, in furnace of calcium carbide electrode seals of the present invention, high temperature fiber cloth plate surface adds one layer of heat resisting steel hauberk, has
Effect prevents graphite electrode from contacting with high temperature fiber cloth direct friction, and service life is obviously prolonged；
2, furnace of calcium carbide electrode seals of the present invention lower layer replaces high temperature fiber cloth, wear-resisting property using corundum prefabricated component
It is significantly improved with high temperature resistance, service life is further obviously prolonged；
3, corundum prefabricated component of the present invention have high abrasion, high intensity, excellent thermal shock resistance, low Fe content but also
It has highly resistance CO erosion performance, provides guarantee for lift-off seal material bulk life time.
Detailed description of the invention
The present invention is done with reference to the accompanying drawings and detailed description and is further illustrated, of the invention is above-mentioned
And/or otherwise advantage will become apparent.
Fig. 1 is in the prior art by the way of the double-deck high temperature fiber cloth sealing furnace of calcium carbide electrode；
Fig. 2 is the mode of this sealing device sealing furnace of calcium carbide electrode；
Fig. 3 is the layout drawing of this sealing device lower layer corundum prefabricated component；
Fig. 4 is the layout drawing of this sealing device upper layer high temperature fiber fabric swatch and hauberk.
Specific embodiment
According to following embodiments, the present invention may be better understood.
Structure depicted in Figure of description, ratio, size etc., only to cooperate the revealed content of specification, with
Understand for those skilled in the art and read, be not intended to limit the invention enforceable qualifications, therefore does not have technically
Essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size can be generated not influencing the present invention
Under effect and the purpose that can reach, should all still it fall in the range of disclosed technology contents can cover.Meanwhile
Cited such as "upper", "lower", "front", "rear", " centre " term in this specification are merely convenient to being illustrated for narration, and
It is non-that to limit the scope of the invention, relativeness is altered or modified, under the content of no substantial changes in technology, when
Also it is considered as the enforceable scope of the present invention.
As shown in Figure 1, have bell 7 on furnace of calcium carbide burner hearth, and six electrodes column 6, the sealing of furnace of calcium carbide electrode in the prior art
Mode coats two layers of sealing material at electrode column 6, and upper layer 1 and lower layer 2 are high temperature fiber cloth, surrounds one around graphite electrode
Enclose (being made of several valves), but actually use in, with graphite electrode stick rub badly broken, and with High Temperature Gas in furnace of calcium carbide
Atmosphere is in contact, and service life is short.
Shown in Fig. 2 to 4, on the basis of existing technology, lower layer's sealing refractory material is changed into prefabricated by eight valve corundums
Part 5 encloses a circular ring shape, and electrode column is enclosed in middle part and blocks notch, the side of corundum prefabricated component 5 is oppositely arranged
Boss 51 and groove 52, two blocks of adjacent corundum prefabricated components 5 are caught in another piece in advance by the boss 51 of one of prefabricated component
Linking sealing is completed in the groove 52 of product, in such a way that head and the tail enclose, so that corundum prefabricated component forms an entirety and encloses
The structure of conjunction is difficult individually laterally to detach a certain piece therein, thus more stable.
It is warm fiber fabric swatch 3 that upper layer, which seals refractory material, and the substrate of high temperature fiber fabric swatch 3 is steel plate, and the one side of steel plate is pacified
Equipped with high temperature fiber cloth, ceramic beaverboard is coated in the high temperature fiber cloth, eight valve high temperature fiber fabric swatch 3 enclose one jointly
Electrode column is enclosed in middle part and blocks notch by circular ring shape, and the one side and 5 phase of corundum prefabricated component of high temperature fiber cloth are housed
Contact, high temperature fiber fabric swatch 3 outer cladding, one layer of hauberk 4, material is 330 trade mark steel, so that the electrode column of hauberk 4 and middle part
It is in contact, prevents electrode column from contacting with high temperature fiber cloth direct friction.
Embodiment 1
Corundum prefabricated component is made of the component of following mass percent:
Aggregate:
Powder:
The sum of the above aggregate and powder are 100%；
0.1% amino-sulfonic acid-base high performance water-reducer of the additional above component quality summation and 4% water and above group
Part in nano-powder gross mass 0.5% dispersing agent, dispersing agent be anionic surfactant neopelex with
The mixture that gum arabic is mixed according to mass ratio 1:2.
The preparation method is as follows:
Step 1: dispersing agent and water-reducing agent are poured into water and are stirred, it is spare to be configured to mixed liquor；
Step 2: aggregate and powder are uniformly mixed, and the mixed liquor in step 1 is added, is again stirring for mixing；
Step 3: the slurry that step 2 mixes is poured into grinding tool, is formed after jolt ramming；
Step 4: being demoulded after air-set, and being placed in constant-temp. and-moisture maintenance, (temperature is wet between 20~25 DEG C
Degree >=90%) middle maintenance 3 days；
Step 5: the brick body conserved 110~200 DEG C drying after to obtain the final product.
Embodiment 2
Corundum prefabricated component is made of the component of following mass percent:
Aggregate:
Powder:
The sum of the above aggregate and powder are 100%；
0.2% amino-sulfonic acid-base high performance water-reducer of the additional above component quality summation and 5% water and above group
Part in nano-powder gross mass 1% dispersing agent, dispersing agent be anionic surfactant neopelex and Ah
The mixture for drawing uncle's natural gum to mix according to mass ratio 1:2.
The preparation method is as follows:
Step 1: dispersing agent and water-reducing agent are poured into water and are stirred, it is spare to be configured to mixed liquor；
Step 2: aggregate and powder are uniformly mixed, and the mixed liquor in step 1 is added, is again stirring for mixing；
Step 3: the slurry that step 2 mixes is poured into grinding tool, is formed after jolt ramming；
Step 4: being demoulded after air-set, and being placed in constant-temp. and-moisture maintenance, (temperature is wet between 20~25 DEG C
Degree >=90%) middle maintenance 3 days；
Step 5: the brick body conserved 110~200 DEG C drying after to obtain the final product.
Embodiment 3
Corundum prefabricated component is made of the component of following mass percent:
Aggregate:
Powder:
The sum of the above aggregate and powder are 100%；
0.2% amino-sulfonic acid-base high performance water-reducer of the additional above component quality summation and 7% water and above group
Part in nano-powder gross mass 2% dispersing agent, dispersing agent be anionic surfactant neopelex and Ah
The mixture for drawing uncle's natural gum to mix according to mass ratio 1:2.
The preparation method is as follows:
Step 1: dispersing agent and water-reducing agent are poured into water and are stirred, it is spare to be configured to mixed liquor；
Step 2: aggregate and powder are uniformly mixed, and the mixed liquor in step 1 is added, is again stirring for mixing；
Step 3: the slurry that step 2 mixes is poured into grinding tool, is formed after jolt ramming；
Step 4: being demoulded after air-set, and being placed in constant-temp. and-moisture maintenance, (temperature is wet between 20~25 DEG C
Degree >=90%) middle maintenance 3 days；
Step 5: the brick body conserved 110~200 DEG C drying after to obtain the final product.
The corundum prefabricated component that embodiment 1 to 3 is prepared is tested for the property, is surveyed using corresponding national standard
Examination, and it is close to combine with high temperature fiber fabric swatch corundum prefabricated component that embodiment 1 to 3 is prepared at the above-mentioned furnace of calcium carbide electrode of composition
Seal apparatus carries out life span comparison using two layers of high temperature fiber cloth with the prior art, and test result is shown in Table 1:
Table 1
As can be seen from the table, the corundum prefabricated component of Examples 1 to 3 preparation has high abrasion, high intensity, excellent
Thermal shock resistance, low Fe content provides guarantor for lift-off seal material bulk life time but also it has highly resistance CO erosion performance
Card compares traditional fibre cloth sealing means, can extend 3~4 times of the service life using sealing device of the present invention.
The present invention provides the thinkings and method of a kind of furnace of calcium carbide electrode seals, implement the side of the technical solution
There are many method and approach, the above is only a preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.All undefined components in this embodiment can be implemented in the prior art.
Claims (9)
1. a kind of furnace of calcium carbide electrode seals, including be located on bell and seal refractory material around electrode column upper layer and lower layer,
It is characterized in that, lower layer seals the corundum prefabricated component (5) that refractory material is two pieces of combination of the above, and it is two that upper layer, which seals refractory material,
The high temperature fiber fabric swatch (3) of block combination of the above；Described one layer of hauberk (4) of high temperature fiber fabric swatch (3) outer cladding, hauberk (4)
It is directly contacted with electrode column.
2. a kind of furnace of calcium carbide electrode seals according to claim 1, which is characterized in that the corundum prefabricated component
(5) side is oppositely arranged boss (51) and groove (52), and two pieces of adjacent corundum prefabricated components (5) pass through one of prefabricated
The boss (51) of part, which is caught in the groove (52) of another block of prefabricated component, completes linking sealing, two pieces or more corundum prefabricated components (5)
A circular ring shape is enclosed, and graphite electrode is enclosed in middle part.
3. a kind of furnace of calcium carbide electrode seals according to claim 2, which is characterized in that the high temperature fiber fabric swatch
(3) substrate is steel plate, and steel plate is equipped with high temperature fiber cloth on one side, is coated with ceramic beaverboard in the high temperature fiber cloth；
Two pieces or more high temperature fiber fabric swatch (3) enclose a circular ring shape jointly, and electrode column are enclosed in middle part, and high temperature fiber is housed
The one side of cloth is in contact with corundum prefabricated component (5).
4. a kind of furnace of calcium carbide electrode seals according to claim 1, which is characterized in that the corundum prefabricated component work
Skill formula includes the component of following mass percent:
Aggregate:
Powder:
The sum of the above aggregate and powder are 100%；
The water-reducing agent of the additional above component quality summation 0.1-0.2% and the water of 4-7%, and nano-powder is total in the above component
The dispersing agent of quality 0.5-2%.
5. a kind of furnace of calcium carbide electrode seals according to claim 4, which is characterized in that the water-reducing agent is amino sulphur
Sour series high-performance dehydragent.
6. a kind of furnace of calcium carbide electrode seals according to claim 4, which is characterized in that the dispersing agent is anion
The mixture that type surfactant sodium dodecyl base benzene sulfonic acid sodium salt is mixed with gum arabic according to mass ratio 1:2.
7. a kind of furnace of calcium carbide electrode seals according to claim 4, which is characterized in that the corundum prefabricated component is adopted
It is prepared with following steps:
Step 1: dispersing agent and water-reducing agent are poured into water and are stirred, it is spare to be configured to mixed liquor；
Step 2: aggregate and powder are uniformly mixed, and the mixed liquor in step 1 is added, is again stirring for mixing；
Step 3: the slurry that step 2 mixes is poured into mold, is formed after jolt ramming；
Step 4: being demoulded after air-set, is placed in constant-temp. and-moisture maintenance and is conserved 3 days；
Step 5: the brick body conserved is after drying to obtain the final product.
8. a kind of furnace of calcium carbide electrode seals according to claim 7, which is characterized in that in step 4, the constant temperature
The curing condition of constant moisture culturing box is temperature between 20~25 DEG C, humidity >=90%.
9. a kind of furnace of calcium carbide electrode seals according to claim 7, which is characterized in that in step 5, the drying
Temperature be 110~200 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811057573.2A CN109068433B (en) | 2018-09-11 | 2018-09-11 | Electrode sealing device of calcium carbide furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811057573.2A CN109068433B (en) | 2018-09-11 | 2018-09-11 | Electrode sealing device of calcium carbide furnace |
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| Publication Number | Publication Date |
|---|---|
| CN109068433A true CN109068433A (en) | 2018-12-21 |
| CN109068433B CN109068433B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4703493A (en) * | 1985-08-02 | 1987-10-27 | Npp Po Elektrotermia | Seal for an electrode hole in an electric arc furnace |
| CN1740114A (en) * | 2004-08-25 | 2006-03-01 | 武汉科技大学 | Refractory Sialon corundum brick material for blast flurnace and its prepn process |
| CN201626839U (en) * | 2010-02-11 | 2010-11-10 | 蚌埠中恒新材料科技有限责任公司 | Fire-proof electrode seal ring for zirconia electric arc furnace |
| CN102503471A (en) * | 2011-10-26 | 2012-06-20 | 河南省耕生耐火材料有限公司 | Corundum preform added with elemental silicon |
| CN103335527A (en) * | 2013-07-03 | 2013-10-02 | 上海宝锋工程技术有限公司 | Submerged arc furnace electrode sealing device |
| CN103435361A (en) * | 2013-08-19 | 2013-12-11 | 濮阳濮耐高温材料（集团）股份有限公司 | High-wear-proof high-thermal-shock-resistant fire-proof material and prefabricated furnace mouth part made from same |
| CN104344711A (en) * | 2013-08-08 | 2015-02-11 | 洛阳双兴电气科技有限公司 | Split furnace cover |
| CN106977186A (en) * | 2017-04-06 | 2017-07-25 | 江苏江能新材料科技有限公司 | A kind of electrodes in mine hot stove circle seals resistance to material and preparation method |
-
2018
- 2018-09-11 CN CN201811057573.2A patent/CN109068433B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4703493A (en) * | 1985-08-02 | 1987-10-27 | Npp Po Elektrotermia | Seal for an electrode hole in an electric arc furnace |
| CN1740114A (en) * | 2004-08-25 | 2006-03-01 | 武汉科技大学 | Refractory Sialon corundum brick material for blast flurnace and its prepn process |
| CN201626839U (en) * | 2010-02-11 | 2010-11-10 | 蚌埠中恒新材料科技有限责任公司 | Fire-proof electrode seal ring for zirconia electric arc furnace |
| CN102503471A (en) * | 2011-10-26 | 2012-06-20 | 河南省耕生耐火材料有限公司 | Corundum preform added with elemental silicon |
| CN103335527A (en) * | 2013-07-03 | 2013-10-02 | 上海宝锋工程技术有限公司 | Submerged arc furnace electrode sealing device |
| CN104344711A (en) * | 2013-08-08 | 2015-02-11 | 洛阳双兴电气科技有限公司 | Split furnace cover |
| CN103435361A (en) * | 2013-08-19 | 2013-12-11 | 濮阳濮耐高温材料（集团）股份有限公司 | High-wear-proof high-thermal-shock-resistant fire-proof material and prefabricated furnace mouth part made from same |
| CN106977186A (en) * | 2017-04-06 | 2017-07-25 | 江苏江能新材料科技有限公司 | A kind of electrodes in mine hot stove circle seals resistance to material and preparation method |
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| Publication number | Publication date |
|---|---|
| CN109068433B (en) | 2023-10-20 |
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