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Method for calculating strip steel entering zinc pot temperature

A calculation method, zinc pot technology, applied in calculation, computer-aided design, design optimization/simulation, etc., can solve the problem of large fluctuations in the temperature detection value of the strip steel entering the zinc pot, the inability to realize precise control of the strip steel entering the zinc pot, and the inability to Accurately detect the temperature of the strip steel entering the zinc pot, etc., to achieve the effect of solving large temperature errors, satisfying precise control, and avoiding large temperature measurement errors

Active Publication Date: 2021-03-09
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, the temperature of the strip steel entering the zinc pot is detected by a non-contact thermometer. This kind of thermometer uses the principle of reflection to indirectly measure the temperature of the strip steel. Different, therefore, the detection value of the temperature of the strip steel entering the zinc pot fluctuates greatly, and the value deviation often occurs, and the actual temperature of the strip steel entering the zinc pot cannot be accurately detected, so the precise control of the temperature of the strip steel entering the zinc pot cannot be realized , there is no mature accurate measurement or prediction method for the temperature of strip steel entering the zinc pot in the prior art

Method used

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  • Method for calculating strip steel entering zinc pot temperature
  • Method for calculating strip steel entering zinc pot temperature
  • Method for calculating strip steel entering zinc pot temperature

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Experimental program
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Effect test

Embodiment 1

[0095] Collect strip galvanizing production parameters: temperature T of zinc bath in zinc pot pot =455℃, high power value P of zinc pot induction heater h =800kW, low power value P of zinc pot induction heater l = 248kW, high power single run time t h = 29min, low power single run time t l =92min; collect and calculate the number of steel coils produced in the cycle time t n=6, that is, i takes 1,2,...,6, wherein, the weight m of the 6 coils produced i , entrance width b i , the length of the entrance coil l i , Coating weight on the upper surface of the outlet m ui , Coating weight on the lower surface of the outlet m di and production time t i As shown in Table 1.

[0096] Table 1 Calculate the information table of 6 coils of steel strip produced in the cycle time t

[0097]

[0098] Calculation cycle time t=t h +t l =29+92=121 min.

[0099] According to the formulas (7)-(10), (11) and (12), calculate the line mass ratio f of the i-th coil strip i , line area ...

Embodiment 2

[0110] Collect strip galvanizing production parameters: temperature T of zinc bath in zinc pot pot =452℃, high power value P of zinc pot induction heater h =681kW, zinc pot induction heater low power value P l = 227kW, high power single run time t h = 25min, low power single run time t l =19min; Collect and calculate the number of steel coils produced within the cycle time t n=2, i.e. take 1,2 for i, where the weight m of the 2 coils of strip steel produced i , entrance width b i , the length of the entrance coil l i , Coating weight on the upper surface of the outlet m ui , Coating weight on the lower surface of the outlet m di and production time t i as shown in Table 3.

[0111] Table 3 Calculate the information table of 2 coils of strip steel produced in the cycle time t

[0112]

[0113] Calculation cycle time t=t h +t l =25+19=44min.

[0114] According to the formulas (7)-(10), (11) and (12), calculate the line mass ratio f of the i-th coil strip i , line...

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Abstract

Disclosed is a method for calculating strip steel entering zinc pot temperature. According to the zinc pot heat balance principle, input heat Qin = output heat Qout, namely Qstrip + QP = QZ + QL, andthe temperature Tstrip = Tpot + (QZ + QL-QP) / (c*t) of the strip steel entering the zinc pot is obtained according to the formula Qstrip = c*(Tstrip-Tpot).*T; Qstrip is the heat brought by the strip steel entering the zinc pot, QP is the heat provided by the zinc pot induction heater, QZ is the galvanizing heat, QL is the heat loss, Tpot is the temperature of molten zinc in the zinc pot, t is the calculation period time, and c is the average specific heat capacity per unit area within the calculation period time t. The temperature of the strip steel entering the zinc pot can be accurately calculated and monitored, and therefore accurate control over the temperature of the strip steel entering the zinc pot is further achieved.

Description

technical field [0001] The invention relates to a temperature calculation method in the process of strip steel processing, in particular to a calculation method for the temperature of strip steel entering a zinc pot. Background technique [0002] With the increasingly fierce market competition, users have higher and higher requirements for the surface quality of coated products, such as automobile outer panels and home appliance outer panels, which must not only have good coating performance and corrosion resistance, but also have extremely high surface quality. quality. For hot-dip galvanizing units, the zinc pot area is a key factor affecting the surface quality of hot-dip galvanized steel sheets. [0003] The main component of the zinc liquid in the zinc pot of the hot-dip galvanizing unit is zinc, and it also contains a small amount of aluminum. Under normal circumstances, the temperature of the zinc liquid fluctuates within a small temperature range, but when the tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20C23C2/06C23C2/40G06F119/08
CPCC23C2/06C23C2/40
Inventor 王凯钱洪卫金鑫焱
Owner BAOSHAN IRON & STEEL CO LTD
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