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Low-hydration magnesium oxide coating for high magnetic induction grain-oriented silicon steel

A high magnetic induction orientation, magnesium oxide technology, applied in the field of magnesium oxide, can solve the problems of reduced reactivity, lack of expression of hydration rate surface defects, influence of thickness coating adhesion, etc., to ensure consistency and avoid overoxidation. effect of the phenomenon

Active Publication Date: 2016-03-23
山西银圣科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after the reactivity of MgO is reduced, the thickness of the magnesium silicate bottom layer and the adhesion of the coating are affected.
Patent 201310026686.7 proposes a coating formula for isolation coatings on oriented silicon steel, using light magnesium oxide and nano-magnesium oxide mixed to obtain a dense magnesium silicate bottom layer with high hardness, but for the problem of hydration rate and various problems caused by steel plate peroxidation Surface defects not stated

Method used

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  • Low-hydration magnesium oxide coating for high magnetic induction grain-oriented silicon steel
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Examples

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Effect test

Embodiment 1

[0023] A low-hydration magnesia coating for high magnetic induction oriented silicon steel, including 10kg of special magnesia, 0.5kg of titanium dioxide, 0.001kg of antimony sulfate, 0.001kg of silicon micropowder, and 80kg of Deionized water, the above ingredients were mixed for 60 minutes under stirring at 1000r / min, and the reaction temperature was 0°C to make a low-hydration magnesium oxide coating; the content of calcium oxide in special magnesium oxide was 0.02kg (or 0.03kg or 0.04 kg), the content of sulfate is 0.02kg (or 0.03kg or 0.05kg), the content of chloride is 0.01kg (or 0.015kg or 0.02kg), the content of magnesium oxide is 9.9kg (or 9.8kg or 9.7kg) , the impurity content is 0.05kg (or 0.125kg or 0.19kg), magnesium oxide consists of 4.95kg (or 4.9kg or 4.85kg) active magnesium oxide and 4.95kg (or 4.9kg or 4.85kg) inactive magnesium oxide, active Magnesia has a 40% CAA value of 50 seconds and an average particle size of 1-5 microns, and non-reactive magnesium ox...

Embodiment 2

[0025] A low-hydration magnesia coating for high magnetic induction oriented silicon steel, comprising 12kg of special magnesia, 0.8kg of titanium dioxide, 0.003kg of antimony sulfate, 0.003kg of silicon micropowder, and 85kg of Deionized water, the above ingredients were mixed for 75 minutes under stirring at 1300r / min, and the reaction temperature was 3°C to make a low-hydration magnesium oxide coating; the content of calcium oxide in special magnesium oxide was 0.024kg (or 0.036kg or 0.048 kg), the content of sulfate is 0.024kg (or 0.036kg or 0.06kg), the content of chloride is 0.012kg (or 0.018kg or 0.024kg), the content of magnesium oxide is 11.88kg (or 11.76kg or 11.64kg) , the impurity content is 0.06kg (or 0.15kg or 0.228kg), the magnesia is composed of 8.316kg (or 8.232kg or 8.148kg) active magnesia and 3.564kg (or 3.528kg or 3.492kg) inactive magnesia, active Magnesia has a 40% CAA value of 65 seconds and an average particle size of 1-5 microns, and non-reactive magn...

Embodiment 3

[0027]A low-hydration magnesia coating for high magnetic induction oriented silicon steel, including 15kg of special magnesia, 1.0kg of titanium dioxide, 0.005kg of antimony sulfate, 0.005kg of silicon micropowder, and 90kg of Deionized water, the above ingredients were mixed for 90 minutes under stirring at 1500r / min, and the reaction temperature was 5°C to make a low-hydration magnesium oxide coating; the content of calcium oxide in special magnesium oxide was 0.03kg (or 0.045kg or 0.06 kg), the content of sulfate is 0.03kg (or 0.045kg or 0.075kg), the content of chloride is 0.015kg (or 0.0225kg or 0.03kg), the content of magnesium oxide is 14.85kg (or 14.7kg or 14.55kg) , the content of impurities is 0.075kg (or 0.1875kg or 0.285kg), the magnesium oxide consists of 14.1075kg (or 13.965kg or 13.8225kg) active magnesium oxide and 0.7425kg (or 0.735kg or 0.7275kg) inactive magnesium oxide, the active Magnesia has a 40% CAA value of 80 seconds and an average particle size of 1-...

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Abstract

The invention relates to a magnesium oxide for high magnetic induction grain-oriented silicon steel, in particular to a low-hydration magnesium oxide coating for high magnetic induction grain-oriented silicon steel. The low-hydration magnesium oxide coating comprises the following components in parts by mass: 10-15 parts of special magnesium oxide, 0.5-1.5 parts of titanium dioxide, 0.001-0.005 part of a low-melting-point antimony compound, 0.001-0.005 part of a water repellent agent which is silicon micro powder, and 80-90 parts of deionized water. The components are mixed for 60-90 minutes at a stirring state of 1000-1500r / min, and then, the low-hydration magnesium oxide coating is prepared at a reaction temperature of 0-5 DEG C. According to the low-hydration magnesium oxide coating for high magnetic induction grain-oriented silicon steel, the water repellent agent is adopted to restrain hydration of the magnesium oxide, so that water which is taken into a steel coil because of Mg(OH)2 is reduced, and a uniform magnesium silicate bottom layer is formed, and therefore, consistency of a dew point among steel coil layers is guaranteed, and a peroxidation phenomenon is avoided.

Description

technical field [0001] The invention relates to magnesium oxide for high magnetic induction oriented silicon steel, in particular to a low-hydration magnesium oxide coating for high magnetic induction oriented silicon steel. Background technique [0002] To prepare high magnetic induction oriented silicon steel, the hot-rolled sheet with Si content of 2.5-4.0% is normalized, after pickling, cold-rolled to the thickness of the finished product, degreased and then decarburized to form Fe on the surface 2 SiO 4 and SiO 2 The oxide film plays an important role in decarburization, primary recrystallization and formation of magnesium silicate bottom layer. [0003] The magnesium oxide paint is prepared into a slurry, and the paint is coated on the steel plate by the roller coating method. After being dried into a roll, it is annealed at a high temperature, and then pickled, coated with a tension insulating coating, and stretched and annealed to form a finished product. The form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/68
CPCC21D1/68
Inventor 白锋张忠慧郁建强郭毅
Owner 山西银圣科技有限公司
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