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CN-121992326-A - Method for optimizing production scheduling and slag reduction production of hot galvanizing of pull-type steel belt

CN121992326ACN 121992326 ACN121992326 ACN 121992326ACN-121992326-A

Abstract

The invention discloses a method for optimizing production of hot galvanizing of a pull-type steel belt and reducing slag production, and belongs to the technical field of metal material processing. Aiming at the problems of large quality fluctuation, high zinc slag rate and stock backlog when a multi-specification small-batch order is placed for specification change, an order grouping mechanism with the thickness difference less than or equal to 10% is adopted to inhibit the thermal inertia influence of an annealing furnace, the actual TV value (thickness multiplied by speed) is controlled not to exceed the equipment calibration maximum TV value to restrict the production line speed, the zinc pot plate Wen Jingzhun is controlled to be in 465 ℃ plus or minus 5 ℃ standard, and the zinc pot plate is subjected to real-time fine adjustment according to the thickness change and the width change to stabilize the thermal balance of the zinc liquid, the thickness difference is less than or equal to 10% and the new specification TV value is less than or equal to the maximum TV value during the production of the insert sheet. The method realizes the comprehensive benefits of improving the product qualification rate of the specification switching area, obviously reducing the zinc slag rate, reducing the unit insertion consumption and basically eliminating the stock backlog, and solves the core contradiction of continuous zinc-plating line pulling type production.

Inventors

  • WU XINZHONG
  • ZHAO DAN
  • JIA GUANGTAO
  • Lv Baosen
  • ZHANG BAOQIN

Assignees

  • 天津工业职业学院

Dates

Publication Date
20260508
Application Date
20260209

Claims (10)

  1. 1. A method for optimizing production of hot galvanizing of a pull-type steel belt and reducing slag production is characterized by comprising the following steps: (a) After receiving customer orders, grouping according to the thickness specification of the steel strip, wherein the difference between the maximum thickness and the minimum thickness in the group is not more than 10%, and the same group of orders are continuously produced; (b) The TV value dynamic control is that the actual TV value (T multiplied by V) does not exceed the device calibration maximum TV value; (c) And (3) controlling a zinc pot plate Wen Jingzhun: Setting the temperature reference value of the front plate of the plain carbon steel strip entering the zinc pot to 465 ℃ plus or minus 5 ℃; compensating according to the thickness variation delta h (mm), wherein the temperature is reduced when the thickness is thickened and is increased when the thickness is thinned at the temperature of between +/-0.1 mm and gan 0.5.5 ℃; compensating according to the width variation delta w (m), wherein the temperature is +/-100 mm to gan to 0.3 ℃ when the width is widened, the temperature is reduced, and the temperature is raised when the width is widened; (d) And (3) inserting a sheet production constraint: the order insertion needs to meet the following conditions: the thickness difference between the insert specification and the production specification is less than or equal to 10%, and the new specification TV value is less than or equal to the maximum TV value.
  2. 2. The method for optimizing production and reducing slag of hot galvanizing of a pull-type steel strip according to claim 1, wherein the thickness grouping in the step (a) adopts an adjacent specification transition production mode, and thickness specifications in the group are arranged in ascending order or descending order to avoid the insertion of unnecessary transition specifications.
  3. 3. The method for optimizing production of hot dip galvanizing and slag reduction of a pull-type steel strip according to claim 2, wherein in the control of the TV value in the step (b), the maximum TV value of the production line is determined by equipment calibration, in particular the product value of the maximum thickness and the maximum speed which can be born by the annealing furnace under rated power.
  4. 4. The method for optimizing production of hot dip galvanizing and slag reduction of a pull-type steel strip according to claim 1, wherein the plate temperature in the step (C) is dynamically adjusted by a feedforward compensation algorithm, and the compensation amount is calculated by a compensation temperature delta T (° C) = -5 x delta h+ (-3) x delta w; Wherein Δh is the difference (unit mm) between the actual thickness and the reference thickness, Δw is the difference (unit m) between the actual width and the reference width, and the negative sign indicates the temperature decrease when the thickness increases and the temperature decrease when the width increases.
  5. 5. The method for optimizing production of hot dip galvanizing and slag reduction of a pull-type steel strip according to claim 1, wherein when the steel strip with the thickness less than or equal to 2.0mm is produced, a high-frequency infrared thermometer is arranged at the outlet of the annealing furnace, the sampling frequency is not lower than 10Hz, and the temperature of the steel strip is monitored in real time and fed back to a control system.
  6. 6. The method for optimizing production of hot dip galvanizing and slag reduction of a pull-type steel strip according to claim 1, wherein the temperature regulation of an annealing furnace during specification switching is started 30 minutes in advance, and the temperature regulation rate is controlled within a range of 3-5 ℃ per minute.
  7. 7. The method for optimizing production of hot dip galvanizing and slag reduction of a pull-type steel strip according to claim 1, wherein the power adjustment of the zinc pot sensor is required to meet the requirement that the response time is less than or equal to 3 seconds, and the power control precision is +/-1% so as to quickly compensate heat loss.
  8. 8. The method for optimizing production and slag reduction of hot galvanizing of a pull-type steel strip according to claim 1, wherein the production line speed is set to be T multiplied by V and less than or equal to TV_max, wherein TV_max is an inherent value of equipment.
  9. 9. The method for optimizing production of hot dip galvanizing and slag reduction of a pull-type steel strip according to claim 1, wherein the standard thickness of the plain carbon steel is set to be 2.0mm, the standard width is set to be 465mm, and the allowable deviation range of the standard temperature value 465 ℃ is +/-5 ℃.
  10. 10. A control system for implementing a method for optimizing production and reducing slag of hot dip galvanizing a steel strip according to any one of claims 1 to 9, characterized in that: the order intelligent grouping module is used for executing order merging logic with the thickness difference less than or equal to 10 percent and outputting a production batch sequence; the TV value dynamic monitoring unit is used for calculating the current TV value in real time and matching the heating curve of the annealing furnace; a plate temperature feedforward compensator generates a temperature correction command based on a formula delta T= -5 delta h+ (-3) delta w; And a bill inserting feasibility judging device for verifying the double conditions that the thickness difference is less than or equal to 10% and the TV allowance is more than or equal to 15%.

Description

Method for optimizing production scheduling and slag reduction production of hot galvanizing of pull-type steel belt Technical Field The invention relates to the technical field of metal material processing, in particular to a method for optimizing production and slag reduction production of hot galvanizing of a pull-type steel belt. Background The hot galvanizing production line of the steel belt needs to process more than hundred specification products, and the conventional pushing type production leads to frequent specification replacement. The annealing furnace has large temperature fluctuation during specification switching due to thermal inertia, so that the zinc pot is thermally unbalanced, the zinc slag generation amount is increased, and meanwhile, transition specification products are easy to oxidize due to backlog. In the prior art, pull-type production is difficult to implement on a continuous production line, and the main contradiction is that the temperature adjustment of an annealing furnace is delayed when the specification is switched, so that the board Wen Shikong is caused, the unplanned insertion sheet breaks the heat balance, and the transition specification product is forced to be produced, so that waste is caused. There is a need for a pull-in production process that fuses process constraints. Disclosure of Invention This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application. The present invention has been made in view of the above-described problems occurring in the prior art. Therefore, the invention aims to overcome the defects in the prior art and provide a method for optimizing the production of hot galvanizing of a pull-type steel strip and reducing slag. In order to solve the technical problems, the invention provides the following technical scheme that the method for optimizing the production of hot galvanizing and slag reduction of the pull-type steel strip comprises the following steps: (a) After receiving customer orders, grouping according to the thickness specification of the steel strip, wherein the difference between the maximum thickness and the minimum thickness in the group is not more than 10%, and the same group of orders are continuously produced; (b) The TV value dynamic control is that the actual TV value (T multiplied by V) does not exceed the device calibration maximum TV value; (c) And (3) controlling a zinc pot plate Wen Jingzhun: Setting the temperature reference value of the front plate of the plain carbon steel strip entering the zinc pot to 465 ℃ plus or minus 5 ℃; compensating according to the thickness variation delta h (mm), wherein the temperature is reduced when the thickness is thickened and is increased when the thickness is thinned at the temperature of between +/-0.1 mm and gan 0.5.5 ℃; compensating according to the width variation delta w (m), wherein the temperature is +/-100 mm to gan to 0.3 ℃ when the width is widened, the temperature is reduced, and the temperature is raised when the width is widened; (d) And (3) inserting a sheet production constraint: the order insertion needs to meet the following conditions: the thickness difference between the insert specification and the production specification is less than or equal to 10%, and the new specification TV value is less than or equal to the maximum TV value. As a preferable scheme of the method for optimizing production and slag reduction production of hot galvanizing of the pull-type steel strip, the thickness grouping in the step (a) adopts an adjacent specification transition production mode, and thickness specifications in the group are arranged in ascending order or descending order, so that unnecessary transition specification insertion is avoided. As a preferable scheme of the method for optimizing production of hot galvanizing and slag reduction of the pull-type steel strip, the method comprises the following steps of (b) in TV value control, determining the maximum TV value of a production line through equipment calibration, and particularly determining the product value of the maximum thickness and the speed which can be born by an annealing furnace under rated power. The plate temperature dynamic adjustment in the step (C) adopts a feedforward compensation algorithm, and the compensation calculation formula is that the compensation temperature delta T (° C) = -5 x delta h+ (-3) x delta w; Wherein Δh is the difference (unit mm) between the actual thickness and the reference thickness, Δw is the difference (unit m) between the actual width and the reference width, and the negative sign indicates the temperature decrease when the thickness increases and the temperature decrease when the width increas