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Manufacturing method of continuous temperature measurement tube for tundish molten steel

A manufacturing method and technology of temperature measuring tubes, applied to parts of thermometers, thermometers, measuring devices, etc., can solve problems such as intermittent measurement, harsh working environment, and high labor intensity of spot measurement workers

Active Publication Date: 2019-01-01
宋振亚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of disposable fast thermocouples generally requires manual insertion of thermocouples into the tundish for intermittent temperature measurement every 5 to 10 minutes. The measurement has the following shortcomings: (1) The labor intensity of spot measurement workers is high, the working environment is harsh, and It will cause molten steel splashing and there is a risk of personal injury; (2) The quality, insertion position and insertion depth of the fast thermocouple affect the accuracy and stability of temperature measurement; Changing process temperature, does not meet the development trend of automation
However, with the cost reduction and efficiency increase of major steel companies, it is urgent to extend the tundish operation time and improve production efficiency, which puts forward higher requirements on the working life of the tundish continuous temperature measuring tube, because the tundish operation If the molten steel continuous temperature measuring tube is damaged during the process, it will be very difficult to replace it and there will be operational risks. Therefore, it is hoped that the life of the molten steel continuous temperature measuring tube should exceed the service life of the tundish
[0004] On the other hand, most of the current continuous temperature measuring tubes for molten steel in the tundish are made of aluminum carbon. Because they are not resistant to molten steel corrosion, the wall thickness is mostly more than 30mm, and the thermal conductivity is low, so the response time to the temperature change of the tundish molten steel is long. , there is a certain risk of temperature runaway

Method used

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  • Manufacturing method of continuous temperature measurement tube for tundish molten steel
  • Manufacturing method of continuous temperature measurement tube for tundish molten steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: comprise the steps:

[0016] (1) Configure the outer layer material: the weight ratio of the outer layer material is: 20% of silicon carbide particles with a particle size of 600-830 microns, 25% of magnesia-stabilized capacitor zirconia with a particle size of 150-230 microns , 30% of silicon carbide powder with a particle size of 25-45 microns, 5% of aluminum nitride with a particle size of 0.5-2 microns, 10% of hexagonal boron nitride with a particle size of 2-5 microns, and 10% of liquid silicone resin;

[0017] (2) Configure the inner layer material: the weight ratio of the inner layer material is: 15% of silicon carbide particles with a particle size of 600-830 microns, 29% of silicon carbide powder with a particle size of 45-75 microns, and 15% of flake graphite %, alumina micropowder with a particle size of 1.5~3 microns 21%, silicone resin 10%;

[0018] (3) Protective layer coating: The weight ratio of the protective layer is: 65% water, 5% boric...

Embodiment 2

[0020] Embodiment 2: comprise the steps:

[0021] (1) Configure the outer layer material: It is characterized in that the weight ratio of the outer layer material is: 23% of silicon carbide particles with a particle size of 600-830 microns, and magnesium oxide stabilized capacitors with a particle size of 150-230 microns 20% zirconia, 30% silicon carbide powder with a particle size of 25-45 microns, 6% aluminum nitride with a particle size of 0.5-2 microns, 11% hexagonal boron nitride with a particle size of 2-5 microns, liquid silicon Resin 10%;

[0022] (2) Configure the inner layer material: It is characterized in that the weight ratio of the inner layer material is: 18% of silicon carbide particles with a particle size of 600-830 microns, and 28% of silicon carbide powder with a particle size of 45-75 microns , 19% flake graphite, 25% aluminum oxide powder with a particle size of 1.5-3 microns, and 10% silicone resin;

[0023] (3) Protective layer coating: It is characte...

Embodiment 3

[0025] Embodiment 3: comprise the steps:

[0026] (1) Configure the outer layer material: it is characterized in that the weight ratio of the outer layer material is: 25% of silicon carbide particles with a particle size of 600-830 microns, magnesium oxide stabilized capacitors with a particle size of 150-230 microns 16% zirconia, 30% silicon carbide powder with a particle size of 25~45 microns, 6% aluminum nitride with a particle size of 0.5~2 microns, 12% hexagonal boron nitride with a particle size of 2~5 microns, liquid silicon Resin 11%;

[0027] (2) Configure the inner layer material: It is characterized in that the weight ratio of the inner layer material is: 20% of silicon carbide particles with a particle size of 600-830 microns, and 25% of silicon carbide powder with a particle size of 45-75 microns , 20% flake graphite, 25% aluminum oxide powder with a particle size of 1.5-3 microns, and 10% silicone resin;

[0028] (3) Protective layer coating: It is characterize...

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Abstract

The invention relates to a manufacturing method of a continuous temperature measurement tube for tundish molten steel. The continuous temperature measurement tube for the tundish molten steel comprises an inner layer and an outer layer with the thickness being 7-9mm, wherein the outer layer is composed of 20-30% of silicon carbide particles, 15-25% of magnesium oxide stabilized capacitance zirconium oxide, 25-30% of silicon carbide powder, 5-7% of aluminum nitride, 10-15% of hexagonal boron nitride and 8-12% of a silicon resin adhesive; the inner layer is composed of 15-25% of silicon carbideparticles, 20-30% of silicon carbide powder, 15-25% of flake graphite, 15-35% of aluminum oxide micro powder and 8-12% of a silicon resin adhesive; and the surface is coated with a protective layer formed by boric acid and silicon carbide micro powder. The continuous temperature measurement tube for the tundish molten steel has the advantages of molten steel corrosion resistance, long service life, high heat conductivity and short reaction time to the temperature change.

Description

technical field [0001] The invention relates to a method for manufacturing a continuous temperature-measuring tube for molten steel in a tundish. The continuous temperature-measuring tube for molten steel in a tundish is used for continuously monitoring the temperature of molten steel in a tundish. Background technique [0002] In the production process of billet continuous casting (referred to as continuous casting), the temperature of molten steel in the tundish is one of the most important parameters to guide the continuous casting operation, control the quality of the billet, and reduce leakage accidents. The single-use fast thermocouple developed in the late 1950s and early 1960s has become the standard technology for measuring the temperature of molten steel in tundishes for more than half a century, and it is almost the only technology. The use of disposable fast thermocouples generally requires manual insertion of thermocouples into the tundish for intermittent tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K1/10C04B35/569C04B35/622C04B35/66
CPCC04B35/565C04B35/622C04B35/66C04B2235/3206C04B2235/3217C04B2235/3246C04B2235/3409C04B2235/386C04B2235/3865C04B2235/425C04B2235/5427C04B2235/5436C04B2235/5445C04B2235/775C04B2235/9676G01K1/105
Inventor 宋振亚
Owner 宋振亚