CN103288332B - Method and device for improving erosion resistance of regenerator checker and application of high-alumina alkali-free borosilicate glass powder as refractory material - Google Patents
Method and device for improving erosion resistance of regenerator checker and application of high-alumina alkali-free borosilicate glass powder as refractory material Download PDFInfo
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- CN103288332B CN103288332B CN201310082717.0A CN201310082717A CN103288332B CN 103288332 B CN103288332 B CN 103288332B CN 201310082717 A CN201310082717 A CN 201310082717A CN 103288332 B CN103288332 B CN 103288332B
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- 239000000843 powder Substances 0.000 title claims abstract description 53
- 239000005388 borosilicate glass Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000003628 erosive effect Effects 0.000 title abstract description 11
- 239000011819 refractory material Substances 0.000 title abstract description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title abstract description 3
- 239000011521 glass Substances 0.000 claims abstract description 38
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 22
- 239000011248 coating agent Substances 0.000 claims abstract description 15
- 238000000576 coating method Methods 0.000 claims abstract description 15
- 239000011241 protective layer Substances 0.000 claims abstract description 11
- 239000011148 porous material Substances 0.000 claims abstract description 10
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 230000007797 corrosion Effects 0.000 claims description 16
- 238000005260 corrosion Methods 0.000 claims description 16
- 239000000428 dust Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000007664 blowing Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 239000011247 coating layer Substances 0.000 claims description 3
- 239000011449 brick Substances 0.000 abstract description 20
- 239000003546 flue gas Substances 0.000 abstract description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 15
- 238000002844 melting Methods 0.000 abstract description 10
- 230000008018 melting Effects 0.000 abstract description 10
- 230000002378 acidificating effect Effects 0.000 abstract description 5
- 239000011253 protective coating Substances 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000005338 heat storage Methods 0.000 abstract description 2
- 230000008719 thickening Effects 0.000 abstract 1
- 229910052720 vanadium Inorganic materials 0.000 description 10
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 10
- 239000011822 basic refractory Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 8
- 239000002006 petroleum coke Substances 0.000 description 8
- 239000011593 sulfur Substances 0.000 description 8
- 229910052717 sulfur Inorganic materials 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- -1 sulfur-bearing Chemical compound 0.000 description 2
- 230000001458 anti-acid effect Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000005329 float glass Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
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- Ceramic Products (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention discloses a method and a device for improving the erosion resistance of a lattice body and application of high-alumina alkali-free borosilicate glass powder as a refractory material, wherein the method comprises the following steps: 1) spraying high-aluminum alkali-free borosilicate glass powder on the surface of a lattice body at the temperature of 800-1400 ℃ through a regenerator observation hole by using compressed air, so that the glass powder fills micro pores on the surface of the lattice body and forms a coating; 2) and spraying and thickening the coating by using the glass powder to form a compact glass phase protective layer. The device comprises a powder storage tank and a three-way pipe, wherein the bottom of the powder storage tank is provided with a lower powder port, the lower powder port is connected with a branch pipe of the three-way pipe, the input end of a main pipe of the three-way pipe is connected with a compressed air device, the output end of the main pipe is connected with the head end of a powder gun, and the tail end of the powder gun extends into a heat storage chamber. The method forms a compact protective coating, avoids direct contact between the acidic flue gas and the checker brick, and improves the erosion resistance of the checker; the service life of the glass melting furnace and the efficiency of the regenerator are improved, and the energy consumption is reduced. < | 1- >)
Description
Technical field
The present invention relates to glass production line technical field, in particular to a kind of method and apparatus improving Regenerator Checker of Glass Furnace corrosion resistance and high-aluminum alkali-free borosilicate glass powder as the application of refractory material.
Background technology
The regenerator of glass melter is a kind of waste-heat recovery device, for using air as the glass melter of combustion air, regenerator can effective warm-up combustion-supporting air, checker brick is used to increase heating surface area and heat storage capacity in regenerator, the conventionally employed refractory material of checker is clay brick, uses basic firebrick now more.Float glass industry Market competition, for reducing production cost, the petroleum coke powder of currently the majority enterprise employing relative low price is as fuel, but contains a certain amount of sulfur and vanadium etc. in this fuel, and melting furnaces regenerator lattice there is also certain pore.Glass melter is after burning petroleum coke powder, sulfureous in flue gas can contact with regenerator lattice with vanadium, adsorbed by pore and penetrate in the brick body of these regenerator lattices, react with regenerator lattice brick body, after regenerator lattice brick body suffers the chemical erosion of sulfur and vanadium, physicochemical property produces large change, its intensity, heat shock resistance and chemical resistance of concrete ability etc. are greatly reduced, occur subsequently peeling off, the phenomenon such as burst, block checkerwork cell after especially bursting and be difficult to dredge, thus cause regenerator effect to reduce and cause energy consumption to increase, melting furnace life-span is greatly lowered, even some furnace service life can only achieve about the half of projected life.
Summary of the invention
It is an object of the invention to provide a kind of method improving regenerator lattice corrosion resistance and device thereof for the problems referred to above.The method is avoided that flue gas passes through in micro-pore of Regenerator Checker of Glass Furnace adsorbs and penetrates into the brick body of checker to erode it, improves glass melter life-span and the usefulness of regenerator.
For solving the problems referred to above, the technical solution used in the present invention is: a kind of method improving regenerator lattice corrosion resistance, it comprises the steps:
1) utilize compressed air that through regenerator observation port, high-aluminum alkali-free borosilicate glass powder is sprayed at the regenerator lattice surface that temperature is 800 ~ 1400 DEG C, make micro-pore on this glass dust spacer-frame daughter surface and form coating and wrap whole checker surface；
2) the described high-aluminum alkali-free borosilicate glass powder spraying of the coating in step 1) is thickeied, form dense glass phase protective layer.
Further, granularity≤200 mesh of described high-aluminum alkali-free borosilicate glass powder.
Further, described step 1) the middle coating layer thickness ＜ 1mm formed.During spraying ground floor, glass powder is attached on micro-pore on checker surface and surface, and high-temperature fusion forms the coating combined closely with checker.
Further, described step 2) the middle protective layer thickness≤1mm formed.After spraying ground floor, then spraying the second layer to improve coating layer thickness, formation dense glass phase protective layer, to strengthen the corrosion resistance of checker.
The device of the raising Regenerator Checker of Glass Furnace corrosion resistance designed for realizing said method, storage powder tank and the tee T of lower powder mouth it is provided with bottom including, the lower powder mouth of described storage powder tank is connected with the arm of described tee T, the input of the supervisor of described tee T is connected with blowing plant, the outfan of described tee T supervisor is connected with the head end of podwer gun, and the end of described podwer gun stretches in regenerator.
Further, described podwer gun is cased with the protection water jacket of external recirculated water.Owing to accumulation of heat indoor temperature is higher, in order to prevent podwer gun high temperature melting, use protection water jacket external recirculated water protection podwer gun.
Further, it is connected with plastic bushing between the head end of described podwer gun and the outfan of described tee T supervisor.
Further, it is provided with lower powder valve between the import of described tee T arm and the lower powder mouth of described storage powder tank, between the input of described tee T supervisor and described blowing plant, is provided with compressed air valve.
The high-aluminum alkali-free borosilicate glass powder used in the above-mentioned methods is as the application of refractory material, and it is by the coating of high-aluminum alkali-free borosilicate glass powder or to spray in basic refractory surface.
Further, described high-aluminum alkali-free borosilicate glass powder is heated to melting or being sprayed at basic refractory surface after semi-molten state, forms glass phase protective layer.
Compared with prior art, present invention have the advantage that
One; high-aluminum alkali-free borosilicate glass powder sprayed on material is heated to melted or semi-molten state by the temperature of regenerator lattice brick when the inventive method utilizes melting furnaces to use self; and make it be firmly adsorbed on checker brick body surface formation dense glass phase protective coating; this protective coating densification pore-free; the sulfur produced after having completely cut off petroleum coke powder combustion physically contacts with the direct of checker brick with vanadium, thus avoids the chemical erosion effect to regenerator lattice brick of sulfur and vanadium；Checker brick and combustion air and high-temperature flue gas alternately there is heat exchange and the state presenting high temperature and low temperature of rule; and the high-aluminum alkali-free borosilicate glass coefficient of expansion is low; glass phase coating will not produce segmentation crack when operating temperature alternate; checker Watch glass is made to be always the protective coating of firmly densification mutually; glass dust chemical stability is strong; coating, originally as acid material, is highly resistant to the erosion of the acidic flue gas such as sulfur-bearing, vanadium；This protective coating is along with the rising of temperature; the suitable deliquescing of meeting; there is the same strength and toughness of rubber like and be difficult to burst or come off; even if top layer comes off; the glass dust being saturated due to the micro-pore of internal layer is filled; its anti-erosion effect also will not substantially reduce, thus improves the service life of glass melter and the usefulness of regenerator, reduces energy consumption.
Its two, compared with existing hot-spraying technique, the inventive method need not independent thermal source, and technical process is extremely simple, with low cost.
They are three years old, Regenerator Checker of Glass Furnace is built by laying bricks or stones by basic firebrick and is formed, the effect of its opposing flue gas neutral and alkali dust erosion is notable, but easily corroding by the acidic flue gas containing sulfur and vanadium, can use the desulfurization of petroleum coke powder elder generation in theory, the scheme that vanadium removal burns again suffers erosion avoiding checker, but the program does not the most have feasibility in technology and Financial cost, the present invention then improves the corrosion resistance of Regenerator Checker of Glass Furnace in the way of a kind of simple to operation and low cost, the method is applicable not only to make the situation of fuel with petroleum coke powder, and in the case of make fuel with non-petroleum coke powder, also can effectively reduce some other material erosion to checker brick in flue gas.
Its four, the normal usage of high-aluminum alkali-free borosilicate glass powder is glass production material, and the present invention is applied to fire resisting material field, and the anti-flue gas aggressivity of refractory material particularly basic refractory is greatly improved.
Accompanying drawing explanation
Fig. 1 is the working state figure of the device improving regenerator lattice corrosion resistance.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated, but the present invention is not limited to following embodiment.
The device improving regenerator lattice brick corrosion resistance shown in Fig. 1, storage powder tank 1 and the tee T 3 of lower powder mouth 2 it is provided with bottom including, the lower powder mouth 2 of described storage powder tank 1 is connected 302 with the arm of described tee T 3, it is provided with lower powder valve between the import of described tee T arm 302 and the lower powder mouth 2 of described storage powder tank 1, the input of the supervisor 301 of described tee T 3 is connected with blowing plant, it is provided with compressed air valve 4 between the input of described tee T supervisor 301 and described blowing plant, the outfan of described tee T supervisor 301 is connected with the head end of podwer gun 6 by plastic bushing 5, the end of described podwer gun 6 stretches in regenerator 7, the protection water jacket of external recirculated water it is cased with on described podwer gun 6.
nullThe technological process of said apparatus is as follows: the high-aluminum alkali-free borosilicate glass grinding being used for laboratory glass wares becomes the micropowder of below 200 mesh，This glass dust is placed in storage powder tank 1，After opening lower powder valve，Glass dust from lower powder mouth 2 through tee T arm 302 import enter tee T supervisor 301，Simultaneously，Open tee T and be responsible for the compressed air valve 4 of 301 inputs，Blowing plant utilizes compressed air that through plastic bushing 5, glass dust is sent into podwer gun 6 from the supervisor 301 of tee T，In podwer gun 6 is by manually holding the observation port 8 stretching into melting furnaces regenerator 7，Glass dust is used air conveying mode to spray to the surface of the regenerator lattice 9 under the condition of high temperature by podwer gun 6，The material of checker 9 is magnesium zirconia block or 98 magnesia brick bodies，Regenerator lattice 9 operating ambient temperature is about 800 ~ 1400 DEG C，First，Glass dust is heated to melted or semi-molten state by the brick body temperature of checker 9，And then the coating of micro-stomatal limiting value thickness ＜ 1mm on infiltration spacer-frame daughter surface wraps whole checker surface；Then, then thicken with glass dust spraying, make glass dust be adsorbed onto on regenerator lattice 9 brick body surface the dense glass phase protective layer forming thickness≤1mm securely；Owing to accumulation of heat indoor temperature is higher, in order to prevent podwer gun high temperature melting, use protection water jacket external recirculated water protection podwer gun.
Wherein, the physicochemical property of magnesium zirconia block and 98 magnesia bricks such as table 1 below:
Table 1
The physicochemical property such as table 2 below of high-aluminum alkali-free borosilicate glass powder:
Table 2
| Physicochemical property | High-aluminum alkali-free borosilicate glass phase coating |
| SiO2Content (%) | 53~65 |
| Al2O3Content (%) | 15~25 |
| B2O3Content (%) | 4~10 |
| CaO content (%) | 4~10 |
| Content of MgO (%) | 8~10 |
| Density (g.cm3) | 2.5 |
| Linear expansion coefficient (10-7℃-1) | 33 |
| Softening point (DEG C) | 900~1000 |
| Resistance to water | I grade |
| Acid resistance | II grade |
| Alkali resistance | III grade |
Regenerator lattice is mainly used in carrying out heat exchange between high-temperature flue gas and low temperature combustion air, reduce energy consumption, itself do not possesses the chemical stability that stronger antiacid alkali corrodes, by above-mentioned table 2 it can be seen that the checker brick after surface-modified possesses stronger chemical stability.The coating softening point formed after utilizing high-aluminum alkali-free borosilicate glass powder melted, between 900 ~ 1000 DEG C, has fluctuated with glass ingredient difference, then its operating temperature does not interferes with the corrosion resistance of coating below 1400 DEG C.Inventive process avoids the acidic flue gas erosion to regenerator lattice that petroleum coke powder combustion produces, thus avoid checker to peel off because corroding serious, burst, furnace service life is greatly improved；Meanwhile, the method is applicable to the melting furnaces with non-petroleum coke powder as fuel, to improve checker to the corrosion resistance of other material in flue gas, and then improves furnace service life, brings the most considerable economic benefit.
High-aluminum alkali-free borosilicate glass powder is applied to fire resisting material field, is used for improving the corrosion resistance of basic refractory.In high-temperature flue gas because of containing sulfur, vanadium etc. often in acidity, high-temperature flue gas easily adsorbs from basic refractory surface pores and penetrates into and inside basic refractory erodes it；And the high-aluminum alkali-free borosilicate glass coefficient of expansion is low; chemical stability is strong; it itself it is again acid material; it is heated to high-aluminum alkali-free borosilicate glass powder melting or being sprayed at basic refractory surface after semi-molten state; form glass phase protective layer; this glass phase coating is fine and close and is firmly adsorbed on basic refractory surface, makes basic refractory surface modification, is highly resistant to the erosion of the acidic flue gas such as sulfur-bearing, vanadium；This glass phase protective layer is along with the rising of temperature; the suitable deliquescing of meeting, has the same strength and toughness of rubber like and is difficult to burst or come off, even if top layer comes off; the glass dust being saturated due to the micro-pore of basic matterial internal layer is filled, and its anti-erosion effect also will not substantially reduce.Some other corrosive substance in flue gas also can be played obstruct and resistant function by this glass phase protective layer, improves corrosion resistance and the service life of refractory material.
Claims (3)
1. the method improving regenerator lattice corrosion resistance, it is characterised in that: it comprises the steps:
1) utilize compressed air that through regenerator observation port, high-aluminum alkali-free borosilicate glass powder is sprayed at the regenerator lattice surface that temperature is 800～1400 DEG C, make micro-pore on this glass dust spacer-frame daughter surface and form coating and wrap whole checker surface, the described coating layer thickness ＜ 1mm of formation；
2) by step 1) in coating with described high-aluminum alkali-free borosilicate glass powder spraying thicken, formed dense glass phase protective layer, the described protective layer thickness≤1mm of formation；Granularity≤200 mesh of described high-aluminum alkali-free borosilicate glass powder.
2. the device improving regenerator lattice corrosion resistance designed for realizing method described in claim 1, it is characterized in that: include that bottom is provided with storage powder tank and the tee T of lower powder mouth, the lower powder mouth of described storage powder tank is connected with the arm of described tee T, the input of the supervisor of described tee T is connected with blowing plant, the outfan of described tee T supervisor is connected with the head end of podwer gun, and the end of described podwer gun stretches in regenerator；The protection water jacket of external recirculated water it is cased with on described podwer gun；It is provided with lower powder valve between the import of described tee T arm and the lower powder mouth of described storage powder tank, between the input of described tee T supervisor and described blowing plant, is provided with compressed air valve.
The device of raising regenerator lattice corrosion resistance the most according to claim 2, it is characterised in that: it is connected with plastic bushing between the outfan of the head end of described podwer gun and described tee T supervisor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310082717.0A CN103288332B (en) | 2013-03-15 | 2013-03-15 | Method and device for improving erosion resistance of regenerator checker and application of high-alumina alkali-free borosilicate glass powder as refractory material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310082717.0A CN103288332B (en) | 2013-03-15 | 2013-03-15 | Method and device for improving erosion resistance of regenerator checker and application of high-alumina alkali-free borosilicate glass powder as refractory material |
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| Publication Number | Publication Date |
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| CN103288332A CN103288332A (en) | 2013-09-11 |
| CN103288332B true CN103288332B (en) | 2016-08-03 |
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| CN201310082717.0A Active CN103288332B (en) | 2013-03-15 | 2013-03-15 | Method and device for improving erosion resistance of regenerator checker and application of high-alumina alkali-free borosilicate glass powder as refractory material |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1285325A (en) * | 1999-08-21 | 2001-02-28 | 肖特玻璃制造厂 | Aluminiu, boron silicate glass without alkali and application thereof |
| CN102167604A (en) * | 2010-12-31 | 2011-08-31 | 山东省药用玻璃股份有限公司 | Spray repair agent for hot repair of glass furnace |
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2013
- 2013-03-15 CN CN201310082717.0A patent/CN103288332B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1285325A (en) * | 1999-08-21 | 2001-02-28 | 肖特玻璃制造厂 | Aluminiu, boron silicate glass without alkali and application thereof |
| CN102167604A (en) * | 2010-12-31 | 2011-08-31 | 山东省药用玻璃股份有限公司 | Spray repair agent for hot repair of glass furnace |
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