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A method for judging magnesium oxide agglomeration and hydration state in magnesium oxide coating solution for silicon steel

A magnesia coating solution and magnesia technology, applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of indistinguishable particle size and inapplicability to actual conditions, and achieve the effect of reducing agglomeration

Active Publication Date: 2019-03-15
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the particle size measured by the laser particle size analyzer, it is impossible to distinguish whether it is a single magnesia particle or a magnesia aggregate.
In addition, due to the limitations of the laser particle size measurement method, the concentration of the magnesium oxide solution that can be measured must be very low, that is, far lower than the concentration of the magnesium oxide coating solution in the normal use process, so it cannot be applied to the actual situation, and the concentration reflected in the state of use The agglomeration state of magnesium oxide can only be used as a reference

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] What this embodiment takes is the A-type magnesium oxide coating solution prepared by the production line, and the temperature of the coating solution is 8.0°C;

[0029] The method for discriminating magnesium oxide agglomeration situation in A-type magnesium oxide coating solution, its steps:

[0030] 1) Detect the initial viscosity value V of magnesium oxide coating solution 0 , detect the initial viscosity value V0 It is carried out with a viscometer at the temperature of the magnesium oxide coating solution at 8.0°C; the detected initial viscosity value V 0 42.1cp;

[0031] 2) Detect the viscosity value V of magnesium oxide coating solution 1 , will measure the initial viscosity value V 0 The magnesia coating solution was stirred for 20 minutes at a speed of 2000rpm, and the temperature change value of the magnesia coating solution was 0.3°C, that is, when the temperature of the magnesia coating solution was 8.3°C, the viscosity value V of the magnesia coating so...

Embodiment 2

[0042] What this embodiment takes is the B-type magnesium oxide coating solution prepared by the production line, and the temperature of the coating solution is 6.0°C;

[0043] The method for discriminating magnesium oxide agglomeration status in B-type magnesium oxide coating liquid, its steps:

[0044] 1) Detect the initial viscosity value V of magnesium oxide coating solution 0 , detect the initial viscosity value V 0 It is carried out with a viscometer at the temperature of the magnesium oxide coating solution at 6.0°C; the detected initial viscosity value V 0 is 72.5cP;

[0045] 2) Detect the viscosity value V of magnesium oxide coating solution 1 , will measure the initial viscosity value V 0 The magnesium oxide coating solution was stirred for 5 minutes at a speed of 2000rpm, and the temperature change value of the magnesium oxide coating solution was 0.5°C, that is, when the temperature of the magnesium oxide coating solution was 6.5°C, the viscosity value V of the...

Embodiment 3

[0056] What this embodiment takes is the C-type magnesium oxide coating solution prepared by the production line, and the temperature of the coating solution is 6.5°C;

[0057] The method for discriminating the agglomeration of magnesium oxide in the C-type magnesium oxide coating solution, the steps:

[0058] 1) Detect the initial viscosity value V of magnesium oxide coating solution 0 , detect the initial viscosity value V 0 It is carried out with a viscometer at the temperature of the magnesium oxide coating solution at 6.5°C; the detected initial viscosity value V 0 is 28.7cP;

[0059] 2) Detect the viscosity value V of magnesium oxide coating solution 1 , will measure the initial viscosity value V 0 The magnesium oxide coating solution was stirred for 5 minutes at a speed of 1500rpm, and the temperature change value of the magnesium oxide coating solution was 0.2°C, that is, at the temperature of the magnesium oxide coating solution was 6.7°C, the viscosity value V of...

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Abstract

The invention discloses a method for judging magnesium oxide agglomeration and hydration state in silicon steel magnesium oxide coating solution. The method includes steps of detecting initial viscosity value V0 of the magnesium oxide coating; detecting the viscosity value V1 of the magnesium oxide coating; detecting the viscosity value V2 of the magnesium oxide coating; detecting the viscosity value V3 of the magnesium oxide coating; detecting the viscosity value of the magnesium oxide coating V4; judging the agglomeration state in the magnesium oxide coating. The method can exactly judge and measure the magnesium oxide agglomeration and hydration state in the coating, and thereby correspondingly adjusting the magnesium oxide raw material or stirring technique, so as to eliminate or lighten agglomeration, and provide basis for application of technical measures in finally eliminating pitted surface, thin base and other defects in the finished product.

Description

technical field [0001] The invention relates to a method for judging the status of materials, in particular to a method for judging the agglomeration status of magnesium oxide in a magnesium oxide coating solution for silicon steel. Background technique [0002] High-temperature annealing is required in the production process of grain-oriented silicon steel to complete secondary recrystallization and steel purification. In order to prevent the strip from sticking during the high-temperature annealing stage, it is necessary to evenly coat the upper surface and the lower surface of the strip with a magnesium oxide coating solution. The coated magnesium oxide reacts with the oxide layer on the surface of silicon steel during the high-temperature annealing stage to form a magnesium silicate insulating bottom layer, and at the same time assists in removing impurities such as nitrogen and sulfur in the steel. [0003] At present, the magnesium oxide coating solution is generally ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N11/00
CPCG01N11/00
Inventor 郭小龙杨皓高洋曹阳骆忠汉孙亮赵胜利陈文聪骆新根苏懿
Owner 武汉钢铁有限公司