Determination method for hydration rate curve of electrical steel dedicated magnesium oxide

A measurement method and magnesium oxide technology, applied in the direction of removing a certain component and weighing, etc., can solve the problem of incomplete correspondence, etc., and achieve the effect of simple operation and accurate results.

Inactive Publication Date: 2011-08-10
SHOUGANG CORPORATION
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Problems solved by technology

However, the determination of the activity of citric acid can only reflect the hydration performance of magnesium oxide from one side, and because the activity of citric acid cannot completely correspond t

Method used

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  • Determination method for hydration rate curve of electrical steel dedicated magnesium oxide
  • Determination method for hydration rate curve of electrical steel dedicated magnesium oxide
  • Determination method for hydration rate curve of electrical steel dedicated magnesium oxide

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] instrument:

[0029] One 200ml beaker; one thermostat box; one electric furnace; one oven; one muffle furnace; one stopwatch Reagents:

[0030] Magnesium oxide to be tested; distilled water

[0031] Experimental steps:

[0032] 1. Weigh 20 grams of magnesium oxide into a 200ml beaker, add 150ml of distilled water and stir well.

[0033] 2. Put the beaker in the incubator (set at 5°C, 15°C, and 30°C respectively).

[0034] 3. At 30, 60, 90, and 180 minutes, apply the stirred slurry thinly and evenly on the steel plate.

[0035] Dry on electric oven.

[0036] 4. Scrape the magnesium oxide off the steel plate, put it in a weighing bottle and store it in a desiccator.

[0037] 5. Keep the crucible at constant weight.

[0038] 6. Weigh about 1 gram of magnesium oxide and record it as A, put it in a porcelain crucible with constant weight, keep it in an oven at 110°C for 1 hour, weigh it after cooling and record it as B, and calculate the free water.

[0039] 7. Then k...

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Abstract

A determination method for a hydration rate curve of electrical steel dedicated magnesium oxide belongs to the detection field of the chemical properties of a compound. A hydration rate is recorded by a method of hydrating first and then roasting magnesium oxide; and a reaction curve is mapped by taking the hydration time of the magnesium oxide as a horizontal coordinate and the hydration rate as a vertical coordinate, so as to be used for analyzing the hydration performance of the magnesium oxide. The determination method has the advantages that the operation is simple and convenient, the result is accurate, and the determination method can visually reflect the moisture which can be brought into a furnace by magnesium oxide in the production, and the determination method is well joined with the production.

Description

technical field [0001] The invention belongs to the technical field of chemical property detection of compounds, and in particular provides a method for measuring the hydration rate curve of magnesium oxide special for electrical steel. Background technique [0002] Electrical steel sheet is an important magnetic material and one of the most important metal functional materials for the manufacture of motors, transformers and ballast cores, as well as various electrical components for energy saving. In the process of manufacturing the iron core, in order to reduce the eddy current loss, it is necessary to coat the surface of the steel plate with an insulating coating to insulate the layers from each other. In addition to insulation performance, there are also strict requirements on the performance of coating adhesion, heat resistance, punching performance, weldability and corrosion resistance. [0003] Before the final high-temperature annealing of the cold-rolled grain-orie...

Claims

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Application Information

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IPC IPC(8): G01N5/04
Inventor 耿立王崇学王全礼夏兆所潘丽梅周谊军杜守志许学勇赵楠董浩冯莉莉
Owner SHOUGANG CORPORATION
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