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Solid type thermocouple specially for aluminum anode roasting and producing method

A technology of thermocouples and thermocouple wires, applied in the direction of using electric devices, thermometers using directly heat-sensitive electric/magnetic elements, using electromagnetic means, etc., can solve the problem of easy wear, oxidation, and easy breakage of protective tubes, etc. question

Inactive Publication Date: 2006-01-04
GUIYANG AL-MG DESIGN & RES INST
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a thermocouple and a manufacturing method capable of overcoming the easy fracture and oxidation of even wires and having a long effective service life, so as to overcome the easy deformation of thermocouples used in the current aluminum anode roasting production, and the easy breakage and oxidation of even wires. , the protection tube is easy to wear, and the effective service life of the thermocouple is short

Method used

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  • Solid type thermocouple specially for aluminum anode roasting and producing method

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Embodiment Construction

[0015] Embodiments of the present invention: the manufacturing method of the integral thermocouple is as follows: first, high-purity magnesium oxide powder, that is, an insulating, heat-transfer and temperature-resistant material (2), is sintered into a magnesium oxide column, and two holes are reserved in the middle for wearing a thermocouple wire (3 ). Next, the thermocouple wire (3) and the high-temperature alloy protection tube (1) are processed according to the calculated size, and the thermocouple wire (3) is threaded into the magnesium oxide column. Then put the magnesium oxide column with the thermocouple wire (3) into the high-temperature alloy protection tube (1), and draw it with special equipment. After repeated stretching, the size of the high-temperature alloy protection tube (1) becomes smaller, the diameter of the thermocouple wire (3) becomes smaller, the magnesium oxide column becomes magnesium oxide powder, and the three become a non-detachable one. Finally...

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Abstract

The solid type thermocouple special for aluminum anode roasting furnace includes refractory protecting alloy tube, refractory electrically isolating and heat transferring material, thermocouple filament and refractory protecting coating. The making process of the solid type thermocouple includes making cylindrical refractory protecting alloy tube of 4-6mm thick wall, setting the thermocouple filament with ceramic beads and protecting corundum tube inside the refractory protecting alloy tube, filling refractory electrically isolating and heat transferring material inside the refractory protecting alloy tube in the compaction degree over 95 % in integral sealing and filling process, and final spraying refractory anticorrosive layer onto the refractory protecting alloy tube. The present invention has greatly prolonged service life and high production efficiency.

Description

Technical field: [0001] The invention relates to an anode roasting thermocouple for aluminum electrolysis and a manufacturing method thereof. Background technique: [0002] In the production of aluminum anode roasting, due to the characteristics of the anode roasting furnace flue, the temperature measuring thermocouple must have the characteristics of high measurement temperature, resistance to air erosion corrosion containing sulfur and free carbon, and resistance to rapid cooling and rapid heating. [0003] At present, the following three kinds of thermocouples are mainly used in this field at home and abroad: (1) ordinary ceramic protective tube assembled thermocouple, (2) assembled thermocouple with high temperature alloy protective tube, (3) high temperature alloy protective tube heat jacket thermocouple. These three thermocouples all use "N" type thermocouple wire. The (1) thermocouple has poor resistance to rapid cooling and rapid heating, and has been gradually eli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/02
Inventor 黄辉
Owner GUIYANG AL-MG DESIGN & RES INST
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