کوره تشعشعی

کوره تشعشعی به کوره‌هایی گفته می‌شود که شعله به صورت جریانی از روی سطح شارژ حرکت می‌کند و در اثر تشعشع شعله، شارژ ذوب می‌گردد. کوره‌های تشعشعی (انعکاسی)، معمولاً در دو نوع ثابت و دوار (کوره در حین عملیات ذوب، دوران و چرخش دارد) مورد استفاده قرار می‌گیرند. کوره تشعشعی ثابت برای ذوب فلزات و آلیاژهای غیر آهنی به کار می‌رود. کوره‌های تشعشعی نوع دوار به‌طور گسترده‌ای برای ذوب چدن، با ظرفیت‌های ۳۰۰ کیلوگرم به بالا به کار می‌رود.

مزیت‌ها و محدودیت‌ها

مهم‌ترین مزیت‌های کوره‌های تشعشعی[۱]

  • امکان تهیه مذاب با مقادیر زیاد (بالا بودن ظرفیت مذاب به ویژه در مقایسه با نوع (کوره دوار)
  • برخوردای از راندمان حرارتی بیشتر (مقدار راندمان این کوره‌ها نیز در مقایسه با کوره‌های دوار بیشتر است)
  • پخش همسان درجه حرارت و ترکیب شیمیایی به دلیل به هم خوردن مذاب (در نوع دوار کوره‌های تشعشعی)

محدودیت‌های کوره‌های تشعشعی

  • دشوار بودن کنترل واکنش‌های شیمیایی میان مذاب و محصولات احتراق
  • تماس مستقیم شعله با مذاب و سوختن مقداری از عناصر اصلی موجود در مذاب (کربن و سیلیسیم در چدن‌ها)

منابع

  1. «کتاب درسی اصول تکنولوژی ریخته گری» (PDF).

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