CN114133133B - Refractory fiber composite board for working lining of glass tempering furnace - Google Patents
Refractory fiber composite board for working lining of glass tempering furnace Download PDFInfo
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- CN114133133B CN114133133B CN202111423905.6A CN202111423905A CN114133133B CN 114133133 B CN114133133 B CN 114133133B CN 202111423905 A CN202111423905 A CN 202111423905A CN 114133133 B CN114133133 B CN 114133133B
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- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/012—Tempering or quenching glass products by heat treatment, e.g. for crystallisation; Heat treatment of glass products before tempering by cooling
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Abstract
The invention discloses a refractory fiber composite board for a glass tempering furnace working lining, which comprises a refractory fiber board and a high-strength composite coating coated on the surface of the refractory fiber board, wherein the surface of a wet green body of the refractory fiber board is subjected to grid printing treatment, the grid depth is 0.5-2 mm, the mesh size is 2-7 multiplied by 2-7 mm, the high-strength composite coating is sprayed on the grid and the four-wall surface of the wet green body of the refractory fiber board, the refractory fiber board is prepared from refractory fibers, high-temperature inorganic fillers, inorganic binders and organic binders, and the high-strength composite coating is prepared from inorganic fillers and mixed emulsion through stirring.
Description
Technical Field
The invention relates to the technical field of refractory fiber production, in particular to a refractory fiber composite board for a working lining of a glass tempering furnace.
Background
The glass tempering furnace uses a plurality of layers of refractory fiber boards as heat preservation lining bodies, hot air impact exists in the furnace, and the hot air acts on the surfaces of the refractory fiber boards for a long time, so that fiber in a surface layer material of the working lining can be pulverized and fall off. The detached material may drift onto the tempered glass body, causing quality defects in the tempered glass.
In order to avoid the occurrence of defects, the prior glass tempering furnace working lining material generally uses a composite refractory fiber board with a silica sol impregnated surface, and the composite fiber board has high surface hardness and good hot air flow scouring resistance and is widely applied to the tempering furnace industry. But the composite board can generate local warping and local powder falling after long-time use.
For the local warping phenomenon, a large number of anchor pulling pieces are needed to fix the anchor pulling pieces on the furnace body in construction, and the heat short circuit phenomenon can be generated due to the large number of anchor pulling pieces, so that the heat loss and the manufacturing cost of the furnace body are increased, and the construction efficiency is greatly reduced; for the local powder falling phenomenon, the protective film formed on the surface of the silica sol impregnated product is mainly because of the insufficient compactness and poor continuity of the structure, and particularly stress concentration is extremely easy to form after calcination, so that the working surface of the composite board is locally fallen off, and the surface of toughened glass in the furnace is damaged. The exposed part of the damaged part has very small hardness at high temperature, and fiber pulverization is easy to occur, so that the fiber material at the position is damaged in an acceleration way, and if the dropped fiber material falls on the surface of the toughened glass, secondary damage can be caused to the toughened glass.
Disclosure of Invention
The invention aims to overcome the existing defects, and provides the refractory fiber composite board for the working lining of the glass tempering furnace, which can bear the impact of hot air in the glass tempering furnace for a long time, can not generate the phenomena of local warping and powder dropping, improves the use safety of the glass tempering furnace, and can effectively solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a glass tempering furnace is refractory fiber composite sheet for working lining, includes refractory fiber board and the high strength composite coating who coats on its surface, and the wet body surface of refractory fiber board carries out net stamp processing, and net degree of depth is 0.5 ~ 2mm, and the mesh size is 2 ~ 7X 2 ~ 7mm, high strength composite coating sprays to the net and the four wall surface on the wet body surface of refractory fiber board.
As a preferable technical scheme of the invention, the thickness of the high-strength composite coating after being sprayed on the refractory fiber board is 0.2-0.8 mm after the coating is dried.
As a preferable technical scheme of the invention, the high-strength composite coating is sprayed on the refractory fiber board, and then is naturally dried for 5-6 hours at normal temperature, and then is dried to constant weight by using a hot air oven, wherein the drying temperature is not more than 85 ℃.
As a preferable technical scheme of the invention, the fireproof fiber board is prepared from 30-70 parts by weight of fireproof fibers, 10-50 parts by weight of high-temperature inorganic filler, 3-10 parts by weight of inorganic binder and 2-10 parts by weight of organic binder.
As a preferable technical scheme of the invention, the high-strength composite coating is prepared by stirring inorganic filler and mixed emulsion, wherein the content of the inorganic filler is 30-80%, and the content of the mixed emulsion is 20-70%.
As a preferable technical scheme of the invention, the mixed emulsion consists of 80-90% of high-temperature bonding agent, 5-20% of silicone-acrylic emulsion, 0.5-1% of anti-settling agent, 0.2-1% of dispersing agent, 0.1-0.5% of preservative and 0.05-0.3% of defoaming agent.
As a preferable technical scheme of the invention, the inorganic filler is fully dried before use, and the temperature is kept between 50 and 60 ℃ when the mixed emulsion is added.
As a preferable technical scheme of the invention, the defoaming agent adopts an organosilicon defoaming agent.
Compared with the prior art, the invention has the beneficial effects that: (1) The hardness of the composite board coating is higher, mainly because the high-temperature coating does not contain water, the composite board coating is more compact after being dried, and meanwhile, the composite board coating plays a role in protecting refractory fibers in a base material and prevents the refractory fibers from being pulverized and falling; (2) The coating is thin and uniformly distributed, the thickness is about 1/5-1/10 of that of the prior art, the coating is uniformly distributed by virtue of the surface grid, the phenomenon of heat stress concentration can not occur during heating, and the phenomenon of warping is avoided; (3) The heat conductivity coefficient of the composite board is basically unchanged from that of the composite board before the composite board is compounded, and the heat insulation performance is basically unchanged while the surface hardness is increased; (4) Compared with the current impregnated composite board, the size flatness is maintained at high temperature, so that a large number of anchoring nails are not needed, the thermal short circuit position is reduced, and the use efficiency is improved.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The refractory fiber composite board comprises a refractory fiber board and a high-strength composite coating coated on the surface of the refractory fiber board, wherein the refractory fiber board is prepared from refractory fibers, high-temperature inorganic filler, inorganic binder and organic binder, the high-strength composite coating is prepared by stirring inorganic filler and mixed emulsion, and the mixed emulsion consists of high-temperature binder, silicone-acrylate emulsion, anti-settling agent, dispersing agent, preservative and defoaming agent;
the refractory fiber is one of a spray aluminum silicate fiber, a wire-throwing aluminum silicate refractory fiber, a wire-throwing zirconium-containing aluminum silicate refractory fiber, a wire-throwing chromium-containing aluminum silicate fiber, a polycrystalline mullite fiber, a polycrystalline alumina fiber, a polycrystalline zirconia fiber, a polycrystalline cerium oxide fiber and a high silica glass fiber;
the high-temperature inorganic filler is one or more of bauxite fine powder, alumina powder and zirconia powder;
the inorganic bonding agent is one or more of aluminum solution, water glass, titanium sol, aluminum sulfate or aluminum phosphate;
the organic bonding agent is one or more of cellulose, industrial starch, modified resin and organosilicon emulsion;
the inorganic filler is one or more of calcined alumina powder, silicon dioxide powder, high bauxite powder and zirconia powder;
the high-temperature bonding agent is one or more of silica sol, ethyl orthosilicate, water glass, aluminum dihydrogen phosphate, mullite sol, aluminum sol or titanium sol;
the viscosity of the silicone-acrylic emulsion is not lower than 1000mpa.s;
the anti-settling agent is one or more of sodium carboxymethyl cellulose, carboxymethyl starch, polyvinyl alcohol or polyacrylamide;
the dispersing agent is one or more of citric acid, trisodium polyphosphate, tartaric acid or FS 20;
the preservative is one or more of ethylene glycol, vegetable oil, pentaerythritol or sorbitol.
Example 1:
(1) Preparation of composite board substrate
The preparation of the composite board substrate comprises the steps of refractory fiber wet green body and green body printing treatment;
the preparation of the wet refractory fiber blank adopts a filter pressing process, and the wet refractory fiber blank is prepared according to 60 parts of sprayed aluminum silicate fiber, 25 parts of bauxite fine powder, 10 parts of aluminum solution, 1 part of cellulose, 3 parts of industrial starch and 1 part of modified resin, wherein the thickness is 15mm, and then the surface of the wet refractory fiber blank is subjected to grid printing treatment, the grid depth is 0.6mm, and the mesh size is 4 multiplied by 4mm.
(2) Preparation of high-strength composite paint
The preparation of the high-strength composite coating comprises the steps of firstly preparing mixed emulsion, then mixing 65% of mixed emulsion with 35% of silica micropowder, stirring for 25min, and finally filtering by using a 40-mesh sieve to obtain the high-strength composite coating, wherein the silica micropowder is heated in an oven for 2h in advance when being added, and the heating temperature is 50 ℃.
The mixed emulsion is prepared by sequentially adding 80% silica sol, 18% silicone-acrylic emulsion, 1% sodium carboxymethylcellulose, 0.4% citric acid, 0.5% vegetable oil and 0.1% organosilicon defoamer into a stirring cup, and strongly stirring for 5min.
(3) Preparation of composite panels
The high-strength composite coating is sprayed on the grid and four wall surfaces of the wet green body surface of the refractory fiber board, the thickness of the coating is 0.6mm after the high-strength composite coating is rolled on the refractory fiber board, the high-strength composite coating is naturally dried for 5 hours at normal temperature after being rolled on the refractory fiber board, and then the high-strength composite coating is dried to constant weight by using a hot air oven, wherein the drying temperature is 75 ℃.
The prepared refractory fiber composite board has the following physical properties through detection:
| physical Properties | Test index |
| Bulk weight, kg/m 3 | 455 |
| Compressive strength, 10% and MPa | 0.45 |
| Permanent line change at 1100 ℃ for 24 h% | 2.1 |
| Thermal conductivity coefficient, hot face 1000 ℃, W/(m.K) | 0.122 |
| Surface hardness at normal temperature, HC | 93 |
| Surface high temperature hardness, HC | 97 |
| Cracking of | No crack |
| Powder falling | Powder falling off can be prevented by pointing and drawing |
| Warp of | Flat and non-warping after calcination |
When the composite plate is used, only the joint of the composite plate is fastened by the metal anchoring piece, and after the furnace body is used for more than or equal to 720 hours, the composite refractory fiber plate is observed to be flat and not warped, and the powder falling condition does not occur at the bottom.
Example 2:
(1) Preparation of composite board substrate
The preparation of the composite board substrate comprises the steps of refractory fiber wet green body and green body printing treatment;
the preparation of the wet refractory fiber blank adopts a filter pressing process, and the wet refractory fiber blank is prepared according to 50 parts of spun chromium-containing aluminum silicate fiber, 34 parts of alumina powder, 8 parts of aluminum sulfate and 8 parts of industrial starch, wherein the thickness is 18mm, and then the surface of the wet refractory fiber blank is subjected to grid printing treatment, the grid depth is 1mm, and the mesh size is 6 multiplied by 6mm.
(2) Preparation of high-strength composite paint
The preparation of the high-strength composite coating comprises the steps of firstly preparing mixed emulsion, then mixing and strongly stirring 55% of mixed emulsion and 45% of alumina powder for 30min, and finally filtering by using a 40-mesh sieve to obtain the high-strength composite coating, wherein the alumina powder needs to be heated in an oven for 2h in advance when being added, and the heating temperature is 50 ℃.
Wherein the mixed emulsion is prepared by sequentially adding 83% mullite sol, 15% silicone-acrylic emulsion, 0.5% carboxymethyl starch, 0.7% trisodium polyphosphate, 0.5% glycol and 0.3% organosilicon defoamer into a stirring cup, and strongly stirring for 5min.
(3) Preparation of composite panels
The high-strength composite coating is sprayed on the grid and four wall surfaces of the wet green body surface of the refractory fiber board, the thickness of the coating is 0.8mm after the high-strength composite coating is rolled on the refractory fiber board, the high-strength composite coating is naturally dried for 5.5 hours at normal temperature after being rolled on the refractory fiber board, and then the high-strength composite coating is dried to constant weight by using a hot air oven, wherein the drying temperature is 80 ℃.
The prepared refractory fiber composite board has the following physical properties through detection:
when the composite plate is used, only the joint of the composite plate is fastened by the metal anchoring piece, and after the furnace body is used for more than or equal to 720 hours, the composite refractory fiber plate is observed to be flat and not warped, and the powder falling condition does not occur at the bottom.
Example 3:
(1) Preparation of composite board substrate
The preparation of the composite board substrate comprises the steps of refractory fiber wet green body and green body printing treatment;
the preparation of the wet refractory fiber blank adopts a filter pressing process, the wet refractory fiber blank is prepared according to 56 parts of polycrystalline mullite fiber, 24 parts of bauxite fine powder, 10 parts of aluminum solution and 7 parts of modified resin, the thickness is 16mm, then the surface of the wet refractory fiber blank is subjected to grid printing treatment, the grid depth is 0.8mm, and the mesh size is 5 multiplied by 5mm.
(2) Preparation of high-strength composite paint
The preparation of the high-strength composite coating comprises the steps of firstly preparing mixed emulsion, then mixing 80% of mixed emulsion with 20% of high-alumina bauxite powder, stirring for 25min, and finally filtering by using a 40-mesh sieve to obtain the high-strength composite coating, wherein the high-alumina bauxite powder needs to be heated in an oven for 2h in advance when being added, and the heating temperature is 50 ℃.
Wherein the mixed emulsion is prepared by sequentially adding 78% silica sol, 20% silicone acrylic emulsion, 0.6% polyvinyl alcohol, 0.8% citric acid, 0.4% vegetable oil and 0.2% organosilicon defoamer into a stirring cup, and strongly stirring for 5min.
(3) Preparation of composite panels
The high-strength composite coating is sprayed on the grid and four wall surfaces of the wet green body surface of the refractory fiber board, the thickness of the coating is 0.8mm after the high-strength composite coating is rolled on the refractory fiber board, the high-strength composite coating is naturally dried for 6 hours at normal temperature after being rolled on the refractory fiber board, and then the high-strength composite coating is dried to constant weight by using a hot air oven, wherein the drying temperature is 75 ℃.
The prepared refractory fiber composite board has the following physical properties through detection:
when the composite plate is used, only the joint of the composite plate is fastened by the metal anchoring piece, and after the furnace body is used for more than or equal to 720 hours, the composite refractory fiber plate is observed to be flat and not warped, and the powder falling condition does not occur at the bottom.
Comparative example: the conventional silica sol-impregnated refractory fiber board is used, the normal-temperature surface hardness is 65HC, the high-temperature surface hardness is 68HC, the refractory fiber board is fixed on a furnace body through a large number of anchor pulling pieces, the condition of the refractory fiber board is observed after the furnace body is used for more than or equal to 720 hours, the common refractory fiber board has a warping phenomenon, and the bottom powder falling condition is serious.
Conclusion: according to the invention, the thickness consistency and the distribution uniformity of the high-strength composite coating on the surface of the fiber board are ensured by printing grid treatment on the fire-resistant fiber board, so that the whole coating is promoted not to crack or fall off after being dried and burned at high temperature; the high-strength coating is bonded without water, the thickness of the coating is small, the hardness is high at normal temperature and high temperature, the coating is not cracked, the thermal shock resistance is good, the warping phenomenon can not occur, and only the metal anchoring piece at the joint of the composite board is required to be fastened, so that the construction efficiency is improved.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a glass tempering furnace work lining is with fire-resistant fiber composite sheet which characterized in that: the high-strength composite coating is prepared by stirring inorganic filler and mixed emulsion, wherein the inorganic filler content is 30-80%, the mixed emulsion content is 20-70%, the mixed emulsion consists of high-temperature bonding agent, silicone-acrylic emulsion, anti-settling agent, dispersing agent, preservative and defoamer, wherein the high-temperature bonding agent is 80-90%, the silicone-acrylic emulsion is 5-20%, the anti-settling agent is 0.5-1%, the dispersing agent is 0.2-1%, the preservative is 0.1-0.5%, the defoamer is 0.05-0.3%, the high-temperature bonding agent is one or more of silica sol, tetraethoxysilane, water glass, aluminum dihydrogen phosphate, mullite sol, aluminum sol or titanium sol, the wet blank surface of the refractory fiber plate is subjected to grid printing treatment, the grid depth is 0.5-2 mm, the mesh size is 2-7X 2-7 mm, and the high-strength composite coating is sprayed on the grid and four-wall surface of the wet blank surface of the refractory fiber plate.
2. The refractory fiber composite board for a glass tempering furnace working lining according to claim 1, wherein: after the high-strength composite coating is sprayed on the refractory fiber board, the thickness of the coating after drying is 0.2-0.8 mm.
3. The refractory fiber composite board for a glass tempering furnace working lining according to claim 1, wherein: the high-strength composite coating is sprayed on a fireproof fiber board, and then is naturally dried for 5-6 hours at normal temperature, and then is dried to constant weight by using a hot air oven, wherein the drying temperature is not more than 85 ℃.
4. The refractory fiber composite board for a glass tempering furnace working lining according to claim 1, wherein: the fireproof fiber board is prepared from 30-70 parts by weight of fireproof fibers, 10-50 parts by weight of high-temperature inorganic filler, 3-10 parts by weight of inorganic binder and 2-10 parts by weight of organic binder.
5. The refractory fiber composite board for a glass tempering furnace working lining according to claim 1, wherein: the inorganic filler is fully dried before use, and the temperature is kept between 50 and 60 ℃ when the mixed emulsion is added.
6. The refractory fiber composite board for a glass tempering furnace working lining according to claim 1, wherein: the defoaming agent is an organosilicon defoaming agent.
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| CN108727880A (en) * | 2018-06-27 | 2018-11-02 | 梁小红 | A kind of formula of refractory ceramics coating |
| CN109128013A (en) * | 2018-08-09 | 2019-01-04 | 长兴中建耐火材料科技有限公司 | Zirconia toughened mullite is the steel moulder's paint and preparation method thereof of refractory aggregate |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0960154A (en) * | 1995-08-30 | 1997-03-04 | Ig Tech Res Inc | Fire resistant panel |
| CN104727511A (en) * | 2015-04-20 | 2015-06-24 | 南通聚仁新材料科技有限公司 | Flame-retardant flexible sheet |
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