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Self-leveling insulating castable for thermocouple wrapping

A thermocouple and self-leveling technology, which is applied in the field of self-leveling insulating castables for thermocouple wrapping, can solve the problems of losing the protective effect of U-shaped quartz tubes, reducing the insulation performance of refractory fillers, and poor moisture-proof performance of refractory fillers, etc., to achieve excellent self-leveling Good fluidity, moisture-proof effect, and high mechanical strength

Active Publication Date: 2016-04-06
北京东峰兴达耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, this castable in the prior art has the following technical defects: 1. The moisture-proof performance of the refractory filler is poor. After the thermocouple is processed, if it is stored in the air with a relative humidity greater than 60% for 2-3 hours, the refractory filler The insulation performance is greatly reduced (the resistance is reduced to below 5MΩ), so it cannot be directly used in actual production
Moreover, due to the poor moisture-proof performance of the refractory filler, if it is stored in the air with a relative humidity greater than 60% for more than 3 hours, the strength of the refractory filler will decrease, making the anti-slag cap (aluminum cap) loose or even fall off, which will lose Protection for U-shaped quartz tubes
2. Use phosphoric acid or phosphate solution as a binder to reconcile the castable and fill it through vibration, which is not environmentally friendly and will cause harm to the human body during production and processing

Method used

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  • Self-leveling insulating castable for thermocouple wrapping
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  • Self-leveling insulating castable for thermocouple wrapping

Examples

Experimental program
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Embodiment 1

[0021] The self-leveling insulating castable for thermocouple wrapping in this embodiment is composed of the following components: brown corundum sand, brown corundum fine powder, alumina powder, fused alumina cement and water reducing agent.

[0022] The brown corundum sand is composed of 30-40 mesh brown corundum sand, 50-60 mesh brown corundum sand, 70-80 mesh brown corundum sand, 90-100 mesh brown corundum sand and 110-120 mesh brown corundum sand; 10 kg for brown corundum sand, 10 kg for 50-60 mesh brown corundum sand, 3 kg for 70-80 mesh brown corundum sand, 12 kg for 90-100 mesh brown corundum sand, 15 kg for 110-120 mesh brown corundum sand kilogram.

[0023] The brown corundum fine powder is composed of brown corundum fine powder with a particle size greater than 0 mesh and less than or equal to 180 mesh and brown corundum fine powder with a particle size of 200-325 mesh; the brown corundum fine powder with a particle size greater than 0 mesh and less than or equal to...

Embodiment 2

[0028] The self-leveling insulating castable for thermocouple wrapping in this embodiment is composed of the following components: brown corundum sand, brown corundum fine powder, alumina powder, fused alumina cement and water reducing agent.

[0029] The brown corundum sand is composed of 30-40 mesh brown corundum sand, 50-60 mesh brown corundum sand, 70-80 mesh brown corundum sand, 90-100 mesh brown corundum sand and 110-120 mesh brown corundum sand; 4 kg of brown corundum sand, 12 kg of brown corundum sand of 50-60 mesh, 5 kg of brown corundum sand of 70-80 mesh, 15 kg of brown corundum sand of 90-100 mesh and 17 kg of brown corundum sand of 110-120 mesh kilogram.

[0030] The brown corundum fine powder is composed of brown corundum fine powder with a particle size greater than 0 mesh and less than or equal to 180 mesh and brown corundum fine powder with a particle size of 200-325 mesh; the brown corundum fine powder with a particle size greater than 0 mesh and less than or...

Embodiment 3

[0035] The self-leveling insulating castable for thermocouple wrapping in this embodiment is composed of the following components: brown corundum sand, brown corundum fine powder, alumina powder, fused alumina cement and water reducing agent.

[0036] The brown corundum sand is composed of 30-40 mesh brown corundum sand, 50-60 mesh brown corundum sand, 70-80 mesh brown corundum sand, 90-100 mesh brown corundum sand and 110-120 mesh brown corundum sand; 12 kg for brown corundum sand, 8 kg for 50-60 mesh brown corundum sand, 5 kg for 70-80 mesh brown corundum sand, 10 kg for 90-100 mesh brown corundum sand and 13 kg for 110-120 mesh brown corundum sand kilogram.

[0037] The brown corundum fine powder is composed of brown corundum fine powder with a particle size greater than 0 mesh and less than or equal to 180 mesh and brown corundum fine powder with a particle size of 200-325 mesh; the brown corundum fine powder with a particle size greater than 0 mesh and less than or equal ...

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Abstract

The invention discloses a self-levelling insulation castable for thermocouple packaging. The self-levelling insulation castable for thermocouple packaging is composed of the following components: brown corundum size sand, brown corundum fine powder, alumina powder, fused alumina cement and a water reducing agent. Through grain size distribution refinement and the like, the self-lleveling insulation castable for thermocouple packaging can realize automatic filling and filling space enriching without vibration under the circumstance of adding tap water, phosphoric acid or phosphate solution is not needed as a binding agent, and no external force is needed in the filling process to perform vibration. Tap water is directly added in the castable involved in the invention to realize even stirring, and then the evenly stirred castable is poured into the filling space needing casting. The castable can realize automatic filling and filling space enriching depending on self gravity, thereby realizing degassing levelling and densification.

Description

technical field [0001] The invention relates to a material for thermocouple wrapping, in particular to a self-leveling insulating castable for thermocouple wrapping. Background technique [0002] Rapid temperature measuring thermocouple (also known as: one-time consumable thermocouple) is used to measure the temperature of molten steel and high-temperature molten metal, and is a one-time consumable thermocouple. Its working principle is based on the thermoelectric effect of the metal, using the temperature difference generated at both ends of the thermocouple to measure the temperature of molten steel and high molten metal. The rapid temperature measuring thermocouple is mainly composed of a temperature measuring couple head and a large paper tube. The dual head mainly has positive and negative dual wires welded on the compensation wire, the compensation wire is embedded in the bracket, the bracket is covered with a small paper tube, and the dual wire is supported and prote...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 裴真西
Owner 北京东峰兴达耐火材料有限公司
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