CN112657811A - Unique magnesium oxide batching process for forming high-quality bottom layer - Google Patents
Unique magnesium oxide batching process for forming high-quality bottom layer Download PDFInfo
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- CN112657811A CN112657811A CN202011474882.7A CN202011474882A CN112657811A CN 112657811 A CN112657811 A CN 112657811A CN 202011474882 A CN202011474882 A CN 202011474882A CN 112657811 A CN112657811 A CN 112657811A
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Abstract
The invention relates to the technical field of magnesium oxide batching processes, and discloses a unique magnesium oxide batching process for forming a high-quality bottom layer, which comprises the following steps: s1, degreasing, namely transferring the cold-rolled silicon steel coil to a degreasing unit for degreasing treatment, and brushing and degreasing through degreasing equipment; and S2, washing the degreased silicon steel strip with warm water. The magnesium silicate glass film bottom layer prepared by magnesium oxide batching has the prior technical effects of preventing a steel coil from generating adhesive tape in the high-temperature annealing process, having high hardness, good insulating property, firm combination with a steel belt and the like, can improve the quality of the film bottom layer, improve the activity of a coating, ensure that the interlayer insulating resistance and the insulating coating have higher adhesiveness and better magnetism, and ensure that the magnesium oxide batching process has the advantages of high purity, activity, granularity, adhesiveness, hydration property and coating amount during coating so as to form a good magnesium silicate bottom layer in the high-temperature annealing process.
Description
Technical Field
The invention relates to the technical field of magnesium oxide batching processes, in particular to a unique magnesium oxide batching process for forming a high-quality bottom layer.
Background
The magnesium oxide is mainly used as a separant for high-temperature annealing of the oriented silicon steel, the isolating coating has obvious influence on the performance of the oriented silicon steel, when the temperature of the high-temperature annealing is raised to about 900 ℃, the magnesium oxide and a silicon dioxide oxide film on the surface of a steel strip are subjected to chemical reaction to form a magnesium silicate bottom layer, and the good magnesium silicate bottom layer is an important component of an insulating coating on the surface of the oriented silicon steel.
The data show that the reaction temperature of the special magnesium oxide and the silicon dioxide on the surface of the oriented silicon steel is 900-, The hydration property and coating amount of the coating have a large influence on the quality of the glass film.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a unique magnesium oxide batching process for forming a high-quality bottom layer, which has the advantages of excellent purity, activity, granularity, adhesiveness, hydration property during coating and coating weight of magnesium oxide, so that a good magnesium silicate bottom layer can be formed in the high-temperature annealing process, and the problem that the good magnesium silicate bottom layer cannot be formed in the high-temperature annealing process due to improper control of components and process of coating magnesium oxide is solved.
The invention provides the following technical scheme: a unique magnesium oxide dosing process for forming a high quality bottom layer comprising the steps of:
s1 degreasing
Transferring the cold-rolled silicon steel coil to a degreasing unit for degreasing, and brushing and degreasing through degreasing equipment;
s2 degreasing agent removal
Washing the degreased silicon steel strip with warm water to remove the degreasing agent on the surface of the silicon steel strip;
s3, drying the steel strip
Placing the washed steel strip into a drying furnace for drying, wherein the drying temperature is 50-70 ℃;
s4 magnesium oxide coating
Drying the steel strip by using magnesium oxide, and then feeding the steel strip into a coating machine for magnesium oxide coating, wherein the magnesium oxide is uniformly coated on the surface of the steel strip, and the amount of single-side coating is 5-8 g/m;
s5, drying the coating
Drying the coated steel strip by a natural gas drying furnace, wherein the temperature in the furnace is 360 ℃;
s6, collecting the steel strip
And winding and collecting the steel belt after the coating liquid is dried by a winding machine.
Preferably, the concentration of the emulsion degreasing agent is 3% -7%, the temperature of the degreasing agent is 40-70 ℃, the degreasing speed is 20-60 m/min, and the degreasing agent is a special emulsion degreasing agent.
Preferably, the magnesium oxide ingredient in step S4 includes light magnesium oxide with a mass concentration greater than 0.2Kg/L, nano magnesium oxide with an average particle size of 50nm and a magnesium oxide weight content greater than 99.9%, boric acid, antimony dioxide, titanium dioxide, and deionized water.
Preferably, the titanium dioxide is anatase titanium dioxide, the weight content of the titanium dioxide is more than 98%, and the water soluble substance is less than 0.5%.
Preferably, the conductivity of the deionized water is less than 5 mu s/cm, and the mass concentration of the chloride ions is less than 0.5 mu g/ml.
Preferably, the activated magnesia has plate-like and strip-like magnesia particles, and the non-activated magnesia has round and granular magnesia particles.
Compared with the prior art, the invention has the following beneficial effects:
the magnesium silicate glass film bottom layer prepared by magnesium oxide batching has the prior technical effects of preventing a steel coil from generating adhesive tape in the high-temperature annealing process, having high hardness, good insulating property, firm combination with a steel belt and the like, can improve the quality of the film bottom layer, improve the activity of a coating, ensure that the interlayer insulating resistance and the insulating coating have higher adhesiveness and better magnetism, and ensure that the magnesium oxide batching process has the advantages of high purity, activity, granularity, adhesiveness, hydration property and coating amount during coating so as to form a good magnesium silicate bottom layer in the high-temperature annealing process.
Drawings
FIG. 1 is a diagram of the operation steps of the process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Referring to fig. 1, a unique magnesium oxide batch process for forming a high quality bottom layer includes the steps of:
s1 degreasing
Transferring the cold-rolled silicon steel coil to a degreasing unit for degreasing treatment, and brushing and degreasing the cold-rolled silicon steel coil by using degreasing equipment, wherein the degreasing agent is a special emulsion degreasing agent, the concentration of the emulsion degreasing agent is 3-7%, the temperature of the degreasing agent is 40-70 ℃, and the speed of the degreasing unit is 20-60 m/min;
s2 degreasing agent removal
Washing the degreased silicon steel strip with warm water to remove the degreasing agent on the surface of the silicon steel strip;
s3, drying the steel strip
Placing the washed steel strip into a drying furnace for drying, wherein the drying temperature is 50-70 ℃;
s4 magnesium oxide coating
The steel strip is dried by magnesium oxide and then enters a coating machine for magnesium oxide coating, the magnesium oxide is uniformly coated on the surface of the steel strip, the coating amount on one surface is 5-8 g/m, the magnesium oxide ingredients are light magnesium oxide with the mass concentration of more than 0.2Kg/L, nano magnesium oxide with the average particle size of 50nm and the weight content of magnesium oxide of more than 99.9%, boric acid, antimony dioxide, titanium dioxide and deionized water, wherein the titanium dioxide is anatase titanium dioxide, the weight content of the titanium dioxide is more than 98%, the water soluble substance is less than 0.5%, the conductivity of the deionized water is less than 5 mu s/cm, the mass concentration of chloride ions is less than 0.5 mu g/ml, the active magnesium oxide has flaky and strip-shaped magnesium oxide particles, and the inactive magnesium oxide has round and granular magnesium oxide particles;
s5, drying the coating
Drying the coated steel strip by a natural gas drying furnace, wherein the temperature in the furnace is 360 ℃;
s6, collecting the steel strip
And winding and collecting the steel belt after the coating liquid is dried by a winding machine.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments 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. A unique magnesium oxide batching process for forming a high quality bottom layer is characterized in that: the method comprises the following steps:
s1 degreasing
Transferring the cold-rolled silicon steel coil to a degreasing unit for degreasing, and brushing and degreasing through degreasing equipment;
s2 washing with water
Washing the degreased silicon steel strip with warm water to remove the degreasing agent on the surface of the silicon steel strip;
s3, drying
Placing the washed steel strip into a drying furnace for drying, wherein the drying temperature is 50-70 ℃;
s4 magnesium oxide coating
Drying the steel strip by using magnesium oxide, and then feeding the steel strip into a coating machine for magnesium oxide coating, wherein the magnesium oxide is uniformly coated on the surface of the steel strip, and the amount of single-side coating is 5-8 g/m;
s5, drying the coating
Drying the coated steel strip by a natural gas drying furnace, wherein the temperature in the furnace is 360 ℃;
s6, collecting the steel strip
And winding and collecting the steel belt after the coating liquid is dried by a winding machine.
2. The unique magnesium oxide batch process for forming a high quality bottom layer as claimed in claim 1, wherein: the concentration of the emulsion degreasing agent is 3% -7%, the temperature of the degreasing agent is 40-70 ℃, the degreasing speed is 20-60 m/min, and the degreasing agent is a special emulsion degreasing agent.
3. The unique magnesium oxide batch process for forming a high quality bottom layer as claimed in claim 1, wherein: the magnesium oxide ingredient in the step S4 comprises light magnesium oxide with mass concentration more than 0.2Kg/L, nano magnesium oxide with average particle size of 50nm and magnesium oxide weight content more than 99.9%, boric acid, antimony dioxide, titanium dioxide and deionized water.
4. The unique magnesium oxide batch process for forming a high quality bottom layer according to claim 3, wherein: the titanium dioxide is anatase titanium dioxide, the weight content of the titanium dioxide is more than 98%, and the weight content of the water-soluble substance is less than 0.5%.
5. The unique magnesium oxide batch process for forming a high quality bottom layer as claimed in claim 1, wherein: the conductivity of the deionized water is less than 5 mu s/cm, and the mass concentration of chloride ions is less than 0.5 mu g/ml.
6. The unique magnesium oxide batch process for forming a high quality bottom layer as claimed in claim 1, wherein: the active magnesium oxide has flaky and strip-shaped magnesium oxide particles, and the inactive magnesium oxide has round and granular magnesium oxide particles.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011474882.7A CN112657811A (en) | 2020-12-14 | 2020-12-14 | Unique magnesium oxide batching process for forming high-quality bottom layer |
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| CN202011474882.7A CN112657811A (en) | 2020-12-14 | 2020-12-14 | Unique magnesium oxide batching process for forming high-quality bottom layer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114854960A (en) * | 2022-03-30 | 2022-08-05 | 武汉钢铁有限公司 | Annealing separant for reducing surface defects of oriented silicon steel and using method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114181A (en) * | 2013-01-24 | 2013-05-22 | 广东盈泉钢制品有限公司 | Coating formula of oriented silicon steel barrier coat |
| CN104831267A (en) * | 2015-04-23 | 2015-08-12 | 包头市威丰电磁材料有限责任公司 | Cold-rolled oriented silicon steel magnesium oxide coating production technology |
| CN108373604A (en) * | 2016-11-02 | 2018-08-07 | 青岛国福实业有限公司 | A kind of environment-friendly type nano barrier coat |
| CN109306198A (en) * | 2018-08-22 | 2019-02-05 | 武汉钢铁有限公司 | For improving the masking liquid and preparation method thereof of high magnetic induction grain-oriented silicon steel magnesium silicate bottom layer quality |
-
2020
- 2020-12-14 CN CN202011474882.7A patent/CN112657811A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114181A (en) * | 2013-01-24 | 2013-05-22 | 广东盈泉钢制品有限公司 | Coating formula of oriented silicon steel barrier coat |
| CN104831267A (en) * | 2015-04-23 | 2015-08-12 | 包头市威丰电磁材料有限责任公司 | Cold-rolled oriented silicon steel magnesium oxide coating production technology |
| CN108373604A (en) * | 2016-11-02 | 2018-08-07 | 青岛国福实业有限公司 | A kind of environment-friendly type nano barrier coat |
| CN109306198A (en) * | 2018-08-22 | 2019-02-05 | 武汉钢铁有限公司 | For improving the masking liquid and preparation method thereof of high magnetic induction grain-oriented silicon steel magnesium silicate bottom layer quality |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114854960A (en) * | 2022-03-30 | 2022-08-05 | 武汉钢铁有限公司 | Annealing separant for reducing surface defects of oriented silicon steel and using method thereof |
| CN114854960B (en) * | 2022-03-30 | 2023-09-05 | 武汉钢铁有限公司 | Annealing isolating agent for reducing surface defects of oriented silicon steel and use method thereof |
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