Fast thermocouple for molten steel temperature measurement

  Fast thermocouple for molten steel temperature measurement
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Fast thermocouple is used to measure the temperature of molten steel and high-temperature molten metal
It is a disposable consumption thermocouple
The working principle of fast thermocouple is to measure the temperature of molten steel and high molten metal by using the temperature difference and electrothermal generated at both ends of the thermocouple according to the thermoelectric effect of metal
It is mainly composed of temperature measuring couple head and large paper tube
The coupling head mainly has positive and negative coupling wires welded on the compensation wire, the compensation wire is embedded on the support, the support is covered with a small paper tube, and the coupling wire is supported and protected by quartz
The outermost part is equipped with anti slag cap
All parts and components are centrally loaded into the mud head and bonded into a whole with fire-resistant filler, which is not removable, so it is disposable
The structure of fast thermocouple is mainly composed of temperature measuring couple head and large paper tube
The coupling head mainly has positive and negative coupling wires welded on the compensation wire, fast thermocouple, the compensation wire is embedded on the support, the support is covered with a small paper tube, and the coupling wire is supported and protected by quartz
The outermost part is equipped with anti slag cap
All parts and components are centrally loaded into the mud head and bonded into a whole with fire-resistant filler, which is not removable, so it is disposable

 
Application method of fast thermocouple
1
According to the measured object and range, select the appropriate length of protective paper tube and applicable temperature measuring gun

2
At this time, the pointer can be put back on the thermometer (or the pointer can be put back into good contact) for quick measurement

3
The insertion depth of the fast thermocouple into the molten steel should be 300-400mm
During the measurement, do not measure on the furnace wall or slag, so as to be fast, stable and accurate
When the secondary instrument obtains the results, the gun should be lifted immediately
The immersion time of the fast thermocouple in the molten steel should not exceed 5 seconds, otherwise the temperature measuring gun is easy to be burned

4
After the temperature measuring gun is removed from the furnace, remove the used thermocouple and install a new one
Pause for a few minutes to prepare for the next measurement
Continuous measurement and disassembly are not allowed, otherwise the temperature difference will fluctuate

 
Graduation number: wre3 / 25 upper limit temperature 1820 ℃
　　  S (Platinum Rhodium 10 platinum) upper limit temperature 1760 ℃
  R (platinum rhodium 13 platinum) upper limit temperature 1760 ℃
  B (platinum rhodium 30 - platinum rhodium 6) upper limit temperature 1800 ℃
  Tolerance: normal level (P) & plusmn; 5 ℃ precision grade (J) & plusmn; 2℃
  Wire accuracy: palladium point (1554 ℃) (P) & plusmn; 3℃ （J）± 1
5℃
  Length of paper tube: 300 ~ 1800mm (customized on demand)
 
 
 
Specification, model and performance

name	model	Graduation	Tolerance	Applicable temperature		Measurement time
				optimum	upper limit
Platinum rhodium 30 - platinum rhodium 6	KB-602P	B	& plusmn; five	1500-1700	one thousand seven hundred and fifty	4～6s
Platinum Rhodium 10 platinum	KS-602P	S	& plusmn; five	1400-1600	one thousand six hundred and fifty	4～6s
Platinum rhodium 13 platinum	KR-602P	R	& plusmn; five	1400-1600	one thousand six hundred and fifty	4～6s
Tungsten rhenium 3-tungsten rhenium 25	KW-602P	W	& plusmn; seven	1500-1700	one thousand and eight hundred	4～6s

 
Thermocouple process description
1
Consumable fast thermocouple (temperature measuring probe) is a temperature sensor designed for measuring the temperature of metal liquid in steelmaking and ironmaking process (including electric furnace, converter, refining furnace, LF furnace, oxygen blowing station, ladle, molten iron ladle, tundish, etc
)

2
The fast thermocouple measures temperature by measuring thermoelectric EMF
Its main part is the coupling head
It is composed of two different metal materials, including compensation conductor, U-shaped quartz tube, plastic support, high-temperature mud head, protective cap and paper tube