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CGL - 连续镀锌生产线

CGL - 连续镀锌生产线
连续镀锌生产线（CGL）的作用是在钢带表面涂覆锌或锌/铝涂层，以提高其耐腐蚀性。

可选地进行镀锌退火以将涂层合金化到钢基底中。这就需要在电检段的出口处进行精确的温度监控。

阿美特克土地公司（AMETEK Land）为钢铁行业提供了高质量，可靠的温度测量解决方案已有70多年的历史了。我们的专业仪器范围包括SPOT GS，它专为自动炉管理而设计，并提供对反应和反应区位置的紧密控制，从而可以更严格地控制电镀工艺中的产品质量。
 

  • Frequently Asked Questions +


    Question Answer 
    What is a CGL? A CGL (Continuous Galvanizing Line) is a high-speed production line that applies a protective zinc coating to steel strip by continuously running it through cleaning, heat treatment, a molten zinc bath and finishing operations. CGLs can process strip at speeds exceeding 180 meters per minute and produce millions of tonnes of galvanized steel annually for automotive body panels, appliances, construction materials and other corrosion-critical applications.
    What does CGL stand for? CGL stands for Continuous Galvanizing Line, distinguishing it from batch hot-dip galvanizing processes. The 'continuous' aspect is fundamental—strip is welded end-to-end and processed as an uninterrupted ribbon through all stages, maximizing throughput and coating consistency. This contrasts with batch processes where individual pieces are dipped separately. Major steel producers operate dozens of CGLs globally to meet automotive and construction demand for corrosion-protected steel.
    What are the main CGL steps? A CGL follows a precise sequence: Entry (uncoiler, welder), Cleaning (alkaline cleaning, brushing, rinsing to remove oils), Annealing (heating to ~700-850°C in controlled atmosphere to prepare metallurgy), Zinc Pot (immersion in molten zinc at ~460°C), Gas Wiping (air knives control coating thickness), Cooling, Skin Pass Mill (improves surface finish and mechanical properties), Inspection (surface quality verification) and Exit (coiler). Each stage requires tight process control for quality output.
    Why is temperature control critical? Temperature is the critical control variable throughout a CGL. In the annealing section, precise heating determines steel recrystallization and formability. At the zinc pot, strip temperature affects how zinc wets and bonds to the steel surface—too cold causes poor adhesion, too hot leads to excess intermetallic growth. Deviations of even ±10°C can cause coating defects, surface quality issues and customer rejections. This is why accurate non-contact temperature measurement is essential for CGL yield and quality.
    How do pyrometers help? LAND pyrometers provide accurate strip temperature measurement at critical CGL zones. The SPOT+ GS is optimized for galvanized strip measurement after coating, while the SPOT+ measures bare strip in annealing sections. The SPOT+ MM (Meltmaster) can monitor zinc pot temperature. These instruments deliver the real-time temperature data that process engineers need to maintain coating consistency, optimize line speed and reduce scrap—helping CGL operators achieve first-time quality rates that meet demanding automotive specifications.

  • 应用 +

    • CGL - Galvanneal Exit
      热浸镀锌机组口

      带材在离开锌浴后将进行在线热处理，以使涂层合金化到钢基材中。AMETEK Land 的热浸镀锌带材温度计（GST）专为此应用而设计。

      继续阅读

    • CGL - Top Roll
      上辊

      LSP-HD 61能在该位置对整个带宽进行温度测量。

      继续阅读

  • 视频 +

    • 连续退火和镀锌线非接触式温度测量研究进展
      AMETEK Land SPOT GS - Temperature Measurement of Galvannealed and Galvanized Strip https://youtu.be/leNO8JclWsg

      我们介绍了连续退火（CAL）和镀锌（CGL）生产线的精确非接触式温度测量方法的进步如何确保在钢铁生产中实现所需的金属特性和表面条件。 然后，我们将重点介绍SPOT GS，这是一种先进的非接触式红外点式高温计，专门设计用于在镀锌反应过程中连续，高精度地测量涂层钢带温度。

  • Documentations +