CN110218849B - Bottom separant for high-temperature annealing of oriented silicon steel coil - Google Patents
Bottom separant for high-temperature annealing of oriented silicon steel coil Download PDFInfo
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- CN110218849B CN110218849B CN201910549812.4A CN201910549812A CN110218849B CN 110218849 B CN110218849 B CN 110218849B CN 201910549812 A CN201910549812 A CN 201910549812A CN 110218849 B CN110218849 B CN 110218849B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
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- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
A bottom separant for high-temperature annealing of an oriented silicon steel coil comprises the following components in percentage by mass: more than or equal to 90 percent of magnesium oxide powder, less than or equal to 5 percent of calcium oxide powder and less than or equal to 10 percent of silicon dioxide powder. Compared with the prior art, the invention has the beneficial effects that: the bottom separant for the oriented silicon steel coil during high-temperature annealing forms a ternary slag system combination with high melting point and high alkalinity, so that the requirements of the steel coil on a high-temperature purification annealing process are met, and the generation of edge bonding defects is reduced. The separant prepared by the method is used between the bottom of the steel coil and the cover plate, so that the edge bonding is prevented, the integral yield of the oriented silicon steel is improved by more than 5%, and the economic benefit is remarkable.
Description
Technical Field
The invention belongs to a control and improvement process of quality defects in the production of cold-rolled oriented electrical steel, and particularly relates to a bottom separant for high-temperature annealing of an oriented silicon steel coil.
Background
The cold-rolled oriented electrical steel product is an important metal functional soft magnetic material developed in the power industry and is mainly applied to the field of manufacturing of various power transmission and transformation transformer cores.
Only a few large-scale steel and iron combination enterprises at home and abroad can carry out full-process production, and the steel and iron combination enterprises are one of typical products with a long metallurgical process, and are called as 'pearl on crown' in metallurgical products due to high production difficulty and complex process.
The important process link of the oriented silicon steel product production is a high-temperature purification annealing process, wherein a steel coil is subjected to vertical high-temperature annealing in a furnace, and the maximum annealing temperature is controlled within the range of 1200-1230 ℃. Under the action of complex factors such as high temperature, thermal stress, gravity and the like, the contact part of the vertical steel coil and the chassis is locally overheated by overburning and slag is molten, the edge part is easy to deform or adhere, the tearing, edge cracking and belt breakage are caused during the uncoiling treatment in the rear process, and the whole coil is scrapped in serious cases.
At present, magnesia or magnesia with other compounds as high temperature annealing release agent is mainly added. Silicon dioxide is added into magnesium oxide as an annealing separant by Armco (Amco Steel, USA), loose magnesium silicate is formed on the surface of a steel plate in the secondary recrystallization annealing process, so that protective gas can enter the surface of the steel plate to purify the steel, but the magnesium silicate is difficult to remove in the subsequent brushing process; nano-scale magnesium oxide, titanium dioxide, boride and antimonide are added into a coating formula (CN103114181A) of an oriented silicon steel isolating coating disclosed by Pengzhihua and the like, the technology can enable oriented silicon steel to obtain a good magnesium silicate bottom layer, but the cost is higher, and the isolating agents in the prior art are coated on the surface of strip steel, so that the anti-sticking effect is not ideal.
Disclosure of Invention
The invention provides a bottom separant for high-temperature annealing of an oriented silicon steel coil, which forms a ternary slag system combination with high melting point and high alkalinity, thereby meeting the requirements of high-temperature purification annealing process of the steel coil and reducing the generation of edge bonding defects.
In order to achieve the purpose, the invention adopts the following technical scheme:
a bottom separant for high-temperature annealing of an oriented silicon steel coil comprises the following components in percentage by mass: more than or equal to 90 percent of magnesium oxide powder, less than or equal to 5 percent of calcium oxide powder and less than or equal to 10 percent of silicon dioxide powder.
The purity of the magnesium oxide powder magnesium oxide is more than or equal to 98.5 wt%; the granularity is less than or equal to 0.60 mm.
The particle size of the magnesium oxide powder is less than or equal to 0.60mm, wherein the particle size distribution of 0.20-0.30 mm is more than or equal to 80%.
The purity of the calcium oxide powder is more than or equal to 98 wt%, and the granularity is less than or equal to 0.60 mm.
The particle size of the calcium oxide powder is less than or equal to 0.60mm, wherein the particle size distribution of 0.20-0.30 mm is more than or equal to 80%.
The softening point temperature of the separant is more than or equal to 1250 ℃, and the hemispherical point temperature is more than or equal to 1300 ℃.
Compared with the prior art, the invention has the beneficial effects that:
the bottom separant for the oriented silicon steel coil during high-temperature annealing forms a ternary slag system combination with high melting point and high alkalinity, so that the requirements of the steel coil on a high-temperature purification annealing process are met, and the generation of edge bonding defects is reduced.
The separant prepared by the method is used between the bottom of the steel coil and the cover plate, so that the edge bonding is prevented, the integral yield of the oriented silicon steel is improved by more than 5%, and the economic benefit is remarkable.
Detailed Description
The following examples are provided to further illustrate the embodiments of the present invention:
a bottom separant for high-temperature annealing of an oriented silicon steel coil comprises the following components in percentage by mass: more than or equal to 90 percent of magnesium oxide powder, less than or equal to 5 percent of calcium oxide powder and less than or equal to 10 percent of silicon dioxide powder.
The purity of the magnesium oxide powder magnesium oxide is more than or equal to 98.5 wt%; the granularity is less than or equal to 0.60 mm.
The particle size of the magnesium oxide powder is less than or equal to 0.60mm, wherein the particle size distribution of 0.20-0.30 mm is more than or equal to 80%.
The purity of the calcium oxide powder is more than or equal to 98 wt%, and the granularity is less than or equal to 0.60 mm.
The particle size of the calcium oxide powder is less than or equal to 0.60mm, wherein the particle size distribution of 0.20-0.30 mm is more than or equal to 80%.
The softening point temperature of the separant is more than or equal to 1250 ℃, and the hemispherical point temperature is more than or equal to 1300 ℃.
The invention adopts magnesium oxide powder to isolate the contact between the bottom of the steel coil and the cover plate; calcium oxide is added into the original magnesium oxide powder, and simultaneously, silicon dioxide with the concentration not more than 10 percent is added to form a ternary slag system with high melting point and high alkalinity, wherein the contents of the magnesium oxide, the calcium oxide and the silicon dioxide form a reasonable proportion, so that the softening temperature, the melting point and the hemispherical point of the isolation powder are all higher, and the generation of bonding defects is effectively controlled.
Example 1:
the separant comprises the following components in percentage by mass: 92.5 percent of magnesium oxide powder, 3.5 percent of calcium oxide powder, 3.0 percent of silicon dioxide powder and the balance of inevitable impurities, wherein:
1) the purity of the magnesium oxide powder magnesium oxide is 98.6 wt%, and the integral granularity is less than or equal to 0.60 mm; wherein the particle size distribution of 0.20-0.30 mm accounts for 83%;
2) adding calcium oxide powder into the magnesium oxide powder, and uniformly mixing; the purity of calcium oxide powder calcium oxide is 98.5 wt%, the integral granularity is less than or equal to 0.50mm, wherein the granularity distribution of 0.20-0.30 mm accounts for 86%;
3) the release agent powder was tested for melting characteristics, softening point temperature 1275 ℃ and hemispherical point temperature 1355 ℃.
Reduce the bonding defect and improve the yield by 6 percent.
Example 2:
the separant comprises the following components in percentage by mass: 91.5% of magnesium oxide, 4.3% of calcium oxide, 2.5% of silicon dioxide and the balance of inevitable impurities, wherein:
1) the purity of the magnesium oxide powder magnesium oxide is 98.5 wt%, and the integral granularity is controlled to be less than or equal to 0.60 mm; wherein the particle size distribution of 0.20-0.30 mm accounts for 85%;
2) adding calcium oxide powder into the magnesium oxide powder, and uniformly mixing; the purity of calcium oxide powder calcium oxide is 98.8 wt%, the integral granularity is less than or equal to 0.55mm, wherein the granularity distribution of 0.20-0.30 mm accounts for 83%;
3) the melting characteristic test of the separant powder is carried out, wherein the softening point temperature is 1280 ℃, and the hemispherical point temperature is 1360 ℃.
Reduce the bonding defect and improve the yield by 5 percent.
Example 3:
the separant comprises the following components in percentage by mass: 91.8 percent of magnesium oxide, 3.4 percent of calcium oxide, 3.8 percent of silicon dioxide and the balance of inevitable impurities.
1) The purity of the magnesium oxide powder magnesium oxide is 99.2 percent, and the integral granularity is controlled to be less than or equal to 0.60 mm; wherein the particle size distribution of 0.20-0.30 mm accounts for 86%;
2) adding calcium oxide powder into the magnesium oxide powder, and uniformly mixing; the purity of calcium oxide powder calcium oxide is 99.0 wt%, the integral granularity is less than or equal to 0.55mm, wherein the granularity distribution of 0.20-0.30 mm accounts for 85%;
3) the melting characteristic test of the separant powder is carried out, wherein the softening point temperature is 1270 ℃, and the hemispherical point temperature is 1348 ℃.
Reduce the bonding defect and improve the yield by 7 percent.
The method can recycle the waste magnesium oxide after each high-temperature annealing, and avoid the continuous input of high-cost new powder; meanwhile, the recycled isolation powder is treated and improved, and the requirements of high-temperature purification annealing process of the steel coil are met and the bonding defects at the edges are reduced by adjusting the granularity and the slag system composition and selecting the binary and ternary high-melting-point isolating agents.
Claims (5)
1. The bottom separant for the high-temperature annealing of the oriented silicon steel coil is characterized by comprising the following components in percentage by mass: the magnesium oxide powder is more than or equal to 90 percent and less than or equal to 92.5 percent, the calcium oxide powder is more than or equal to 3.4 percent and less than or equal to 5 percent, and the silicon dioxide powder is more than or equal to 2.5 percent and less than or equal to 3.8 percent; the softening point temperature of the separant is more than or equal to 1250 ℃, and the hemispherical point temperature is more than or equal to 1300 ℃;
the magnesium oxide discarded after each high-temperature annealing is recycled, and the continuous investment of high-cost new powder is avoided.
2. The bottom release agent for high-temperature annealing of the oriented silicon steel coil as claimed in claim 1, wherein the purity of magnesium oxide powder and magnesium oxide is more than or equal to 98.5 wt%; the granularity is less than or equal to 0.60 mm.
3. The bottom separant for high-temperature annealing of the oriented silicon steel coil as claimed in claim 2, wherein the particle size of the magnesium oxide powder is less than or equal to 0.60mm, and the particle size distribution of 0.20-0.30 mm is more than or equal to 80%.
4. The bottom release agent for high-temperature annealing of the oriented silicon steel coil as claimed in claim 1, wherein the purity of calcium oxide powder calcium oxide is not less than 98 wt%, and the particle size is not more than 0.60 mm.
5. The bottom separant for high-temperature annealing of the oriented silicon steel coil as claimed in claim 4, wherein the particle size of the calcium oxide powder is less than or equal to 0.60mm, and the particle size distribution of 0.20-0.30 mm is more than or equal to 80%.
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| CN110218849B true CN110218849B (en) | 2021-04-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110669910A (en) * | 2019-09-30 | 2020-01-10 | 鞍钢股份有限公司 | Recycling method of oriented silicon steel high-temperature annealing base separant |
| CN113801983A (en) * | 2020-06-15 | 2021-12-17 | 宝山钢铁股份有限公司 | Anti-bonding treatment method for thin oriented silicon steel |
| CN114014529B (en) * | 2021-12-17 | 2023-02-21 | 中国建筑材料科学研究总院有限公司 | Isolating agent for fire polishing of borosilicate glass beads |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02274882A (en) * | 1989-04-17 | 1990-11-09 | Nippon Steel Corp | Production of grain-oriented silicon steel sheet having good forsterite insulating film in coil state |
| JPH05320770A (en) * | 1992-05-22 | 1993-12-03 | Nippon Steel Corp | Production of high magnetic flux density grain-oriented silicon steel sheet having no glass film |
| CN102021282A (en) * | 2009-09-21 | 2011-04-20 | 宝山钢铁股份有限公司 | Annealing separant for preparing grain-oriented silicon steel and using method thereof |
| CN102102142A (en) * | 2009-12-22 | 2011-06-22 | 鞍钢股份有限公司 | Production method of energy saving type GO oriented silicon steel |
| CN103014285A (en) * | 2011-09-28 | 2013-04-03 | 宝山钢铁股份有限公司 | Manufacturing method of mirror surface oriented silicon steel with good magnetic performance and annealing parting agent |
| CN103757188A (en) * | 2014-01-08 | 2014-04-30 | 上海钫淦冶金科技有限公司 | Anti-decarburizing separant for bearing steel |
-
2019
- 2019-06-24 CN CN201910549812.4A patent/CN110218849B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02274882A (en) * | 1989-04-17 | 1990-11-09 | Nippon Steel Corp | Production of grain-oriented silicon steel sheet having good forsterite insulating film in coil state |
| JPH05320770A (en) * | 1992-05-22 | 1993-12-03 | Nippon Steel Corp | Production of high magnetic flux density grain-oriented silicon steel sheet having no glass film |
| CN102021282A (en) * | 2009-09-21 | 2011-04-20 | 宝山钢铁股份有限公司 | Annealing separant for preparing grain-oriented silicon steel and using method thereof |
| CN102102142A (en) * | 2009-12-22 | 2011-06-22 | 鞍钢股份有限公司 | Production method of energy saving type GO oriented silicon steel |
| CN103014285A (en) * | 2011-09-28 | 2013-04-03 | 宝山钢铁股份有限公司 | Manufacturing method of mirror surface oriented silicon steel with good magnetic performance and annealing parting agent |
| CN103757188A (en) * | 2014-01-08 | 2014-04-30 | 上海钫淦冶金科技有限公司 | Anti-decarburizing separant for bearing steel |
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