CN111454016A - Thermal equipment gap-filling agent and preparation method thereof - Google Patents
Thermal equipment gap-filling agent and preparation method thereof Download PDFInfo
- Publication number
- CN111454016A CN111454016A CN202010367682.5A CN202010367682A CN111454016A CN 111454016 A CN111454016 A CN 111454016A CN 202010367682 A CN202010367682 A CN 202010367682A CN 111454016 A CN111454016 A CN 111454016A
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- parts
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- thermal equipment
- silica sol
- polyvinyl alcohol
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- 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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
- C04B2111/00672—Pointing or jointing materials
Abstract
The invention provides a thermal equipment gap filling agent which comprises the following components in parts by weight: 7 parts of alumina powder, 2 parts of mullite short fiber, 1 part of silicon powder, 50 parts of polyvinyl alcohol solution with the concentration of 2-10% and 60 parts of silica sol with the concentration of 25-40%. The method mixes alumina powder, mullite short fiber, silicon powder, polyvinyl alcohol and silica sol, and can form a layer of silica film on the surface under the high-temperature condition, thereby playing the roles of sealing, isolating and protecting; the silicon powder is oxidized at high temperature along with volume expansion, so that the effect of filling the corners of the gap is achieved, and the gap is filled to prevent air leakage; meanwhile, the heat insulation plate has a certain heat insulation effect, prevents heat conduction and further plays a role in energy conservation; in addition, the crack-repairing agent has wide raw material source, simple preparation process and low preparation cost, and is beneficial to the instant maintenance of on-line production thermal equipment.
Description
Technical Field
The invention relates to the technical field of functional materials, in particular to a thermal equipment gap filling agent and a preparation method thereof.
Background
At present, the requirements of mass production industries such as cement, glass, steel and the like of industrial kilns on energy conservation and consumption reduction are increasingly improved. In the dry cement production, the oxygen content at the outlet of the decomposing furnace is about 2 percent, while the oxygen content at the outlet of the preheater is increased to about 3 percent or even higher, so that the influence on the standard coal consumption exceeds 1 percent of the coal consumption of the whole unit clinker, the thermal equipment in the production process is difficult to avoid damage and air leakage, and the air leakage is caused by deformation of manhole doors and poking holes all around. The common seam-filling materials are rock wool in some cases, the operation is complex, the potential safety hazard to human body is caused, the appearance is not neat, and the seam-filling effect is limited; common repair materials are short in service life, inspection workers need to fill the repair materials repeatedly, and the repair materials are not suitable for environments where existing rusted steel plates, refractory materials and other metals and non-metal multiple materials exist and high temperature and even flue gas corrosion such as sulfur and chlorine is caused.
Therefore, a high-temperature crack-repairing agent which is used for thermal engineering and has high temperature resistance, long service life and simple preparation method is needed in the prior art.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a thermal equipment gap-filling agent which solves the problem of sealing and leaking stoppage in high-temperature thermal equipment of a predecomposition system of a cement production line and has the functions of heat insulation and heat preservation and a preparation method thereof.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a thermal equipment gap filling agent comprises the following components in parts by weight: 7 parts of alumina powder, 2 parts of mullite short fiber, 1 part of silicon powder, 50 parts of polyvinyl alcohol solution with the concentration of 2-10% and 60 parts of silica sol with the concentration of 25-40%.
The concentration of the polyvinyl alcohol solution is 5%.
The concentration of the silica sol was 30%.
The concentration of the silica sol was 35%.
The invention also provides the following technical scheme.
A preparation method of a thermal equipment gap filling agent comprises the following steps:
firstly, mixing alumina powder, mullite short fiber and silicon powder according to the proportion of 7: 2: 1, mixing the raw materials in a mass ratio to prepare mixed powder;
secondly, preparing a polyvinyl alcohol solution with the concentration of 2-10%;
(III) mixing the polyvinyl alcohol solution with the mixed powder according to the ratio of 5: 1, mixing to prepare mixed slurry;
and (IV) mixing the mixed slurry with 25% -40% silica sol according to the proportion of 1: 1, and uniformly stirring to prepare the thermal equipment gap filling agent.
The concentration of the polyvinyl alcohol solution is 5%.
The concentration of the silica sol was 30%.
The concentration of the silica sol was 35%.
The invention also provides the following technical scheme.
The gap filling mixture comprises the following components in parts by weight: 7 parts of alumina powder, 2 parts of mullite short fiber, 1 part of silicon powder, 50 parts of polyvinyl alcohol solution with the concentration of 2-10% and 60 parts of silica sol with the concentration of 25-40%, wherein the gap-filling mixture is used as a gap filling agent for thermal equipment.
Compared with the prior art, the invention has the beneficial effects that: the mixture of alumina powder, mullite short fiber, silicon powder, polyvinyl alcohol and silica sol can form a layer of silica film on the surface under the high-temperature condition, and plays roles of sealing, isolating and protecting; the silicon powder is oxidized at high temperature along with volume expansion, so that the effect of filling the corners of the gap is achieved, and the gap is filled to prevent air leakage; meanwhile, the heat insulation structure has a certain heat insulation effect, prevents heat conduction, reduces heat dissipation and further plays a role in energy conservation; the mullite fiber can improve the flexibility of the coating and can better buffer the mechanical or thermal stress of the dynamic equipment in the running process; in addition, the crack-repairing agent has wide raw material source, simple preparation process and low preparation cost, and is beneficial to the instant maintenance of on-line production thermal equipment.
Detailed Description
The invention is further illustrated by the following specific embodiments.
Example one
A thermal equipment gap filling agent comprises the following components in parts by weight: 7 parts of alumina powder, 2 parts of mullite short fiber, 1 part of silicon powder, 50 parts of polyvinyl alcohol solution with the concentration of 2 percent and 60 parts of silica sol with the concentration of 25 percent. The silica sol is an alkaline colloid.
The preparation method of the thermal equipment gap filling agent comprises the following steps:
firstly, mixing alumina powder, mullite short fiber and silicon powder according to the proportion of 7: 2: 1, mixing the raw materials in a mass ratio to prepare mixed powder;
preparing a polyvinyl alcohol solution with the concentration of 2%;
(III) mixing the polyvinyl alcohol solution with the mixed powder according to the ratio of 5: 1, mixing to prepare mixed slurry;
and (IV) mixing the mixed slurry with 25% concentration silica sol according to the proportion of 1: 1, and uniformly stirring to prepare the thermal equipment gap filling agent.
The embodiment also provides a gap filling mixture which comprises the following components in parts by mass: 7 parts of alumina powder, 2 parts of mullite short fiber, 1 part of silicon powder, 50 parts of polyvinyl alcohol solution with the concentration of 2% and 60 parts of silica sol with the concentration of 25%, wherein the gap-filling mixture is used as a gap-filling agent for thermal equipment.
Example two
A thermal equipment gap filling agent comprises the following components in parts by weight: 7 parts of alumina powder, 2 parts of mullite short fiber, 1 part of silicon powder, 50 parts of 5% polyvinyl alcohol solution and 60 parts of 30% silica sol. The silica sol is an alkaline colloid.
The preparation method of the thermal equipment gap filling agent comprises the following steps:
firstly, mixing alumina powder, mullite short fiber and silicon powder according to the proportion of 7: 2: 1, mixing the raw materials in a mass ratio to prepare mixed powder;
preparing a polyvinyl alcohol solution with the concentration of 5%;
(III) mixing the polyvinyl alcohol solution with the mixed powder according to the ratio of 5: 1, mixing to prepare mixed slurry;
and (IV) mixing the mixed slurry with 30% concentration silica sol according to the weight ratio of 1: 1, and uniformly stirring to prepare the thermal equipment gap filling agent.
The embodiment also provides a gap filling mixture which comprises the following components in parts by mass: 7 parts of alumina powder, 2 parts of mullite short fiber, 1 part of silicon powder, 50 parts of 5% polyvinyl alcohol solution and 60 parts of 30% silica sol, wherein the gap-filling mixture is used as a gap-filling agent for thermal equipment.
EXAMPLE III
A thermal equipment gap filling agent comprises the following components in parts by weight: 7 parts of alumina powder, 2 parts of mullite short fiber, 1 part of silicon powder, 50 parts of 10% polyvinyl alcohol solution and 60 parts of 35% silica sol. The silica sol is an alkaline colloid.
The preparation method of the thermal equipment gap filling agent comprises the following steps:
firstly, mixing alumina powder, mullite short fiber and silicon powder according to the proportion of 7: 2: 1, mixing the raw materials in a mass ratio to prepare mixed powder;
preparing a polyvinyl alcohol solution with the concentration of 10%;
(III) mixing the polyvinyl alcohol solution with the mixed powder according to the ratio of 5: 1, mixing to prepare mixed slurry;
and (IV) mixing the mixed slurry with 35% concentration silica sol according to the weight ratio of 1: 1, and uniformly stirring to prepare the thermal equipment gap filling agent.
The embodiment also provides a gap filling mixture which comprises the following components in parts by mass: 7 parts of alumina powder, 2 parts of mullite short fiber, 1 part of silicon powder, 50 parts of 10% polyvinyl alcohol solution and 60 parts of 35% silica sol, wherein the gap-filling mixture is used as a gap filling agent for thermal equipment.
Example four
A thermal equipment gap filling agent comprises the following components in parts by weight: 7 parts of alumina powder, 2 parts of mullite short fiber, 1 part of silicon powder, 50 parts of 5% polyvinyl alcohol solution and 60 parts of 40% silica sol. The silica sol is an alkaline colloid.
The preparation method of the thermal equipment gap filling agent comprises the following steps:
firstly, mixing alumina powder, mullite short fiber and silicon powder according to the proportion of 7: 2: 1, mixing the raw materials in a mass ratio to prepare mixed powder;
preparing a polyvinyl alcohol solution with the concentration of 5%;
(III) mixing the polyvinyl alcohol solution with the mixed powder according to the ratio of 5: 1, mixing to prepare mixed slurry;
and (IV) mixing the mixed slurry with 40% concentration silica sol according to the weight ratio of 1: 1, and uniformly stirring to prepare the thermal equipment gap filling agent.
The embodiment also provides a gap filling mixture which comprises the following components in parts by mass: 7 parts of alumina powder, 2 parts of mullite short fiber, 1 part of silicon powder, 50 parts of 5% polyvinyl alcohol solution and 60 parts of 40% silica sol, wherein the gap-filling mixture is used as a gap filling agent for thermal equipment.
The invention is used for the management optimization of the existing production line, for example, after the invention is used for sealing and plugging the peripheries of all barrel material holes, manhole doors, measuring points and flange holes of a cement kiln system, the oxygen content at the outlet of the preheater is reduced from 4 percent to 3 percent, the rotating speed of a high-temperature fan is reduced by 20rpm, the cement kiln system saves 1kg/t of clinker, and saves 0.5kWh/t of clinker. When the thermal equipment in a production state is damaged, leaks air and leaks materials, a thermal mechanism is disordered, and the condition of unqualified production quality is easy to occur; the crack-repairing agent can form a layer of silicon oxide film on the surface under the high-temperature condition in the cement production line, and plays roles in sealing, isolating and protecting; the silicon powder is oxidized at high temperature, is full of the corners of the gaps along with volume expansion, prevents air leakage to a certain extent, and plays a certain heat insulation role. The raw materials of the invention have wide sources, the preparation method is simple and easy to implement, and the invention can be widely applied to the repair of thermal equipment in the industrial field.
The above description is only for the preferred embodiment of the present invention, but the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes and modifications without departing from the inventive concept of the present invention, which falls into the protection scope of the present invention.
Claims (9)
1. A thermal equipment gap filling agent is characterized by comprising the following components in parts by weight: 7 parts of alumina powder, 2 parts of mullite short fiber, 1 part of silicon powder, 50 parts of polyvinyl alcohol solution with the concentration of 2-10% and 60 parts of silica sol with the concentration of 25-40%.
2. The thermal equipment gap filler of claim 1, wherein the concentration of the polyvinyl alcohol solution is 5%.
3. The thermal equipment crack-repairing agent as recited in claim 1, wherein the concentration of the silica sol is 30%.
4. The thermal equipment crack-repairing agent as recited in claim 1, wherein the concentration of the silica sol is 35%.
5. A preparation method of a thermal equipment gap filling agent is characterized by comprising the following steps:
firstly, mixing alumina powder, mullite short fiber and silicon powder according to the proportion of 7: 2: 1, mixing the raw materials in a mass ratio to prepare mixed powder;
secondly, preparing a polyvinyl alcohol solution with the concentration of 2-10%;
(III) mixing the polyvinyl alcohol solution with the mixed powder according to the ratio of 5: 1, mixing to prepare mixed slurry;
and (IV) mixing the mixed slurry with 25% -40% silica sol according to the proportion of 1: 1, and uniformly stirring to prepare the thermal equipment gap filling agent.
6. The method for preparing a thermal equipment gap filler according to claim 5, wherein the concentration of the polyvinyl alcohol solution is 5%.
7. The method for preparing the thermal equipment gap filler according to claim 5, wherein the concentration of the silica sol is 30%.
8. The method for preparing the thermal equipment gap filler according to claim 5, wherein the concentration of the silica sol is 35%.
9. The gap filling mixture comprises the following components in parts by weight: 7 parts of alumina powder, 2 parts of mullite short fiber, 1 part of silicon powder, 50 parts of polyvinyl alcohol solution with the concentration of 2-10% and 60 parts of silica sol with the concentration of 25-40%, and is characterized in that the crack filling mixture is used as a crack filling agent for thermal equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010367682.5A CN111454016A (en) | 2020-04-30 | 2020-04-30 | Thermal equipment gap-filling agent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010367682.5A CN111454016A (en) | 2020-04-30 | 2020-04-30 | Thermal equipment gap-filling agent and preparation method thereof |
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| CN111454016A true CN111454016A (en) | 2020-07-28 |
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| CN202010367682.5A Pending CN111454016A (en) | 2020-04-30 | 2020-04-30 | Thermal equipment gap-filling agent and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013032146A1 (en) * | 2011-08-31 | 2013-03-07 | Lg Innotek Co., Ltd. | Method of fabricating silicon carbide |
| CN103224399A (en) * | 2012-03-15 | 2013-07-31 | 中冶武汉冶金建筑研究院有限公司 | Silica sol-combined mullite perfusion material adapted to rapid repair of industrial furnace |
| CN104193362A (en) * | 2014-08-21 | 2014-12-10 | 苏州伊索来特耐火纤维有限公司 | Filling material for ceramic fiber refractory material shrinkage joints in furnace |
| CN110698184A (en) * | 2019-11-11 | 2020-01-17 | 贵州云弗电炉制造有限公司 | Furnace lining repairing material for rotary kiln |
-
2020
- 2020-04-30 CN CN202010367682.5A patent/CN111454016A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013032146A1 (en) * | 2011-08-31 | 2013-03-07 | Lg Innotek Co., Ltd. | Method of fabricating silicon carbide |
| CN103224399A (en) * | 2012-03-15 | 2013-07-31 | 中冶武汉冶金建筑研究院有限公司 | Silica sol-combined mullite perfusion material adapted to rapid repair of industrial furnace |
| CN104193362A (en) * | 2014-08-21 | 2014-12-10 | 苏州伊索来特耐火纤维有限公司 | Filling material for ceramic fiber refractory material shrinkage joints in furnace |
| CN110698184A (en) * | 2019-11-11 | 2020-01-17 | 贵州云弗电炉制造有限公司 | Furnace lining repairing material for rotary kiln |
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Application publication date: 20200728 |
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