CN111112034A - Spraying method of energy-saving coating - Google Patents
Spraying method of energy-saving coating Download PDFInfo
- Publication number
- CN111112034A CN111112034A CN201911422733.3A CN201911422733A CN111112034A CN 111112034 A CN111112034 A CN 111112034A CN 201911422733 A CN201911422733 A CN 201911422733A CN 111112034 A CN111112034 A CN 111112034A
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- Prior art keywords
- furnace
- temperature
- spraying
- coating
- energy
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
Abstract
The invention discloses a spraying method of an energy-saving coating, which comprises the steps of putting a coating iron drum into a low-temperature resistance furnace, heating to above 30-40 ℃, and continuously preserving heat for 1.5-3.5 hours; preheating a full-fiber high-temperature furnace to be sprayed to a temperature of more than 95-105 ℃, and preserving heat for 1.5-3.5 hours; loading the heated coating into a sprayer, opening a furnace door of the all-fiber high-temperature furnace, spraying the four walls and the furnace top of the high-temperature furnace for one time, wherein the spraying thickness of the coating is 1-4 mm, closing the furnace door after the spraying is finished, quickly heating to 100 ℃, and preserving heat for more than 2 hours; opening the furnace door of the all-fiber high-temperature furnace again, and performing secondary spraying on the four walls and the furnace top of the high-temperature furnace, wherein the spraying thickness of the coating is 4-7 mm; after finishing the secondary spraying, closing the furnace door, and cooling the furnace to room temperature. According to the invention, the coating is heated to about 35 ℃, and the optimal spraying temperature of the coating at 15-30 ℃ can be ensured during spraying, so that the coating and cellucotton are combined; the all-fiber high-temperature furnace to be sprayed is heated to about 100 ℃, and when the furnace door is opened for spraying, the temperature of the furnace wall fiber cotton is about 40 ℃, so that the absorption of the surface layer coating of the furnace wall fiber cotton is facilitated, and the better combination is realized.
Description
Technical Field
The invention belongs to the field of rollers, and particularly relates to a spraying method of an energy-saving coating of an all-fiber high-temperature furnace.
Background
At present, a roller mill adopts a high-temperature trolley type resistance furnace to heat treat various rollers. The electric energy is heated by the resistance band to become heat energy, and the consumption of the heat energy is mainly material heating and furnace body heat loss. The size of the radiant heat energy absorbed by the materials is related to factors such as the size of the inner wall of the resistance furnace, the volume of the hearth, the emissivity of the furnace wall and the temperature of the wall surface. After the high-temperature furnace is designed and shaped, the size of the inner wall of the furnace and the area of a hearth are determined. To improve the thermal efficiency, the possibility of the emissivity of the furnace wall and the temperature of the wall surface can be found only.
The inner wall of most domestic high-temperature resistance furnaces is made of all fibers instead of traditional refractory bricks, so that the heat energy utilization rate is improved. In order to improve the heat efficiency of the all-fiber high-temperature furnace, a layer of high-temperature coating is sprayed on the wall of the high-temperature furnace simply. The coating usually causes uneven thickness after coating, and the coating is also easy to crack and even peel in low-temperature seasons or cold places.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a method for spraying an energy-saving coating.
The technical scheme is as follows: the invention discloses a spraying method of an energy-saving coating, which comprises the following steps: a spraying method of an energy-saving coating comprises the following steps:
(1) putting the micro-nano high-temperature far-infrared coating iron barrel into a low-temperature resistance furnace, heating to above 30-40 ℃, and continuously preserving heat for 1.5-3.5 hours;
(2) preheating a full-fiber high-temperature furnace to be sprayed to a temperature of more than 95-105 ℃, and preserving heat for 1.5-3.5 hours;
(3) loading the heated coating into a sprayer;
(4) opening a furnace door of the all-fiber high-temperature furnace, spraying the four walls and the furnace top of the high-temperature furnace for the first time, wherein the spraying thickness of the coating is 1-4 mm, closing the furnace door after the spraying is finished, rapidly heating to 100 ℃, and preserving heat for more than 2 hours;
(5) opening the furnace door of the all-fiber high-temperature furnace again, and performing secondary spraying on the four walls and the furnace top of the high-temperature furnace, wherein the spraying thickness of the coating is 4-7 mm;
(6) after finishing the secondary spraying, closing the furnace door, and cooling the furnace to room temperature.
Wherein the dope in the step (1) is heated to 35 ℃.
Wherein, the whole fiber to be sprayed in the step (2) is preheated to 100 ℃ in a high-temperature furnace.
And (3) spraying the coating in the step (4) once to a thickness of 2-3 mm.
And (3) performing secondary spraying on the coating in the step (5) to obtain a coating with the thickness of 5-6 mm.
And (4) after the primary spraying in the step (4) is finished, quickly heating the all-fiber high-temperature furnace to 100 ℃.
Has the advantages that: compared with the prior art, the invention has the following advantages:
(1) the invention adopts the secondary spraying under the condition that the paint and the furnace wall have certain temperature, so that the bonding capability of the paint and the furnace wall can be effectively improved;
(2) according to the invention, the coating is heated to about 35 ℃, the optimal spraying temperature of the coating at 15-30 ℃ can be ensured during spraying, and the coating becomes viscous due to too low temperature, so that the coating becomes thick; the paint viscosity is reduced due to the overhigh temperature of the paint, which is not beneficial to the combination of the paint and the cellucotton;
(3) the invention heats the all-fiber high-temperature furnace to be sprayed to about 100 ℃, when the furnace door is opened for spraying, the temperature of the furnace wall fiber cotton is about 40 ℃, which is beneficial to the absorption of the surface coating of the furnace wall fiber cotton and better combination;
(4) the invention adopts a secondary coating method to ensure the thickness and uniformity of the coating and better reduce the heat absorbed by the cellucotton;
(5) according to the invention, after the spraying is finished, the furnace door is closed for cooling, so that the temperature of the coating on the furnace wall can be reduced at a uniform speed, and the phenomenon that the coating cracks and even peels off due to different regional cooling speeds is prevented;
(6) compared with the traditional spraying process, the method can save 5-10% of energy by heat treatment of materials with the same material and the same process.
Detailed Description
Example 1:
putting the coating iron bucket into a low-temperature resistance furnace, heating to above 30 ℃ and keeping the temperature for 1.5 hours; preheating a full-fiber high-temperature furnace to be sprayed to a temperature higher than 95 ℃, and preserving heat for 1.5 hours; loading the heated coating into a sprayer; opening a furnace door of the all-fiber high-temperature furnace, spraying the four walls and the furnace top of the high-temperature furnace for one time, closing the furnace door after the spraying of the coating is finished, quickly heating to 95 ℃, and preserving heat for more than 2 hours; opening the furnace door of the all-fiber high-temperature furnace again, and performing secondary spraying on the four walls and the furnace top of the high-temperature furnace, wherein the spraying thickness of the coating is 4 mm; after finishing the secondary spraying, closing the furnace door, and cooling the furnace to room temperature.
Example 2:
putting the coating iron bucket into a low-temperature resistance furnace, heating to more than 40 ℃, and continuously preserving heat for 3.5 hours; preheating a full-fiber high-temperature furnace to be sprayed to a temperature higher than 105 ℃, and preserving heat for 3.5 hours; loading the heated coating into a sprayer; opening a furnace door of the all-fiber high-temperature furnace, spraying the four walls and the furnace top of the high-temperature furnace for one time, wherein the spraying thickness of the coating is 4mm, closing the furnace door after the spraying is finished, quickly heating to 105 ℃, and preserving heat for more than 2 hours; opening the furnace door of the all-fiber high-temperature furnace again, and performing secondary spraying on the four walls and the furnace top of the high-temperature furnace, wherein the spraying thickness of the coating is 7 mm; after finishing the secondary spraying, closing the furnace door, and cooling the furnace to room temperature.
Example 3:
putting the coating iron bucket into a low-temperature resistance furnace, heating to over 35 ℃, and continuously preserving heat for 2 hours; preheating a full-fiber high-temperature furnace to be sprayed to a temperature higher than 100 ℃, and preserving heat for 2 hours; loading the heated coating into a sprayer; opening a furnace door of the all-fiber high-temperature furnace, spraying the four walls and the furnace top of the high-temperature furnace for one time, closing the furnace door after the spraying of the coating is finished, quickly heating to 100 ℃, and preserving heat for more than 2 hours; opening the furnace door of the all-fiber high-temperature furnace again, and performing secondary spraying on the four walls and the furnace top of the high-temperature furnace, wherein the spraying thickness of the coating is 5 mm; after finishing the secondary spraying, closing the furnace door, and cooling the furnace to room temperature.
Example 4:
putting the coating iron bucket into a low-temperature resistance furnace, heating to over 35 ℃, and continuously preserving heat for 2 hours; preheating a full-fiber high-temperature furnace to be sprayed to a temperature higher than 100 ℃, and preserving heat for 2 hours; loading the heated coating into a sprayer; opening a furnace door of the all-fiber high-temperature furnace, spraying the four walls and the furnace top of the high-temperature furnace for one time, wherein the spraying thickness of the coating is 3mm, closing the furnace door after the spraying is finished, quickly heating to 100 ℃, and preserving heat for more than 2 hours; opening the furnace door of the all-fiber high-temperature furnace again, and performing secondary spraying on the four walls and the furnace top of the high-temperature furnace, wherein the spraying thickness of the coating is 6 mm; after finishing the secondary spraying, closing the furnace door, and cooling the furnace to room temperature.
Claims (6)
1. The spraying method of the energy-saving coating is characterized by comprising the following steps:
(1) putting the micro-nano high-temperature far-infrared coating iron barrel into a low-temperature resistance furnace, heating to above 30-40 ℃, and continuously preserving heat for 1.5-3.5 hours;
(2) preheating a full-fiber high-temperature furnace to be sprayed to a temperature of more than 95-105 ℃, and preserving heat for 1.5-3.5 hours;
(3) loading the heated coating into a sprayer;
(4) opening a furnace door of the all-fiber high-temperature furnace, spraying the four walls and the furnace top of the high-temperature furnace for the first time, wherein the spraying thickness of the coating is 1-4 mm, closing the furnace door after the spraying thickness is finished, quickly heating to 95-105 ℃, and preserving heat for more than 2 hours;
(5) opening the furnace door of the all-fiber high-temperature furnace again, and performing secondary spraying on the four walls and the furnace top of the high-temperature furnace, wherein the spraying thickness of the coating is 4-7 mm;
(6) after finishing the secondary spraying, closing the furnace door, and cooling the furnace to room temperature.
2. The method for spraying the energy-saving paint as claimed in claim 1, wherein the paint in the step (1) is heated to 35 ℃.
3. The spraying method of energy-saving paint according to claim 1, characterized in that the all-fiber high-temperature furnace to be sprayed in the step (2) is preheated to 100 ℃.
4. The spraying method of the energy-saving coating material according to claim 1, wherein the coating material in the step (4) is sprayed at one time with a thickness of 2-3 mm.
5. The spraying method of the energy-saving coating material according to claim 1, wherein the secondary spraying thickness of the coating material in the step (5) is 5-6 mm.
6. The spraying method of energy-saving paint as claimed in claim 1, wherein the temperature of the all-fiber high-temperature furnace is rapidly raised to 100 ℃ after the completion of the one-time spraying in the step (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911422733.3A CN111112034A (en) | 2019-12-31 | 2019-12-31 | Spraying method of energy-saving coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911422733.3A CN111112034A (en) | 2019-12-31 | 2019-12-31 | Spraying method of energy-saving coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111112034A true CN111112034A (en) | 2020-05-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911422733.3A Pending CN111112034A (en) | 2019-12-31 | 2019-12-31 | Spraying method of energy-saving coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111112034A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4630594A (en) * | 1983-03-09 | 1986-12-23 | Ellersick Russell R | Furnace wall lining composition and the use thereof |
| CN1552779A (en) * | 2003-12-18 | 2004-12-08 | 周惠敏 | High-temperature far infrared paint and preparing method thereof |
| CN106065203A (en) * | 2016-05-31 | 2016-11-02 | 武汉钢铁股份有限公司 | A kind of construction technology of high temperature bell-type furnace fibre furnace lining face coat |
-
2019
- 2019-12-31 CN CN201911422733.3A patent/CN111112034A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4630594A (en) * | 1983-03-09 | 1986-12-23 | Ellersick Russell R | Furnace wall lining composition and the use thereof |
| CN1552779A (en) * | 2003-12-18 | 2004-12-08 | 周惠敏 | High-temperature far infrared paint and preparing method thereof |
| CN106065203A (en) * | 2016-05-31 | 2016-11-02 | 武汉钢铁股份有限公司 | A kind of construction technology of high temperature bell-type furnace fibre furnace lining face coat |
Non-Patent Citations (1)
| Title |
|---|
| 李学伟主编: "《金属材料工程实践教程》", 31 March 2014 * |
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Application publication date: 20200508 |
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