فصلنامه علمی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 مهندسی سرامیک،پژوهشگاه مواد و انرژی،تهران،ایران

2 پژوهشگاه مواد و انرژی،تهران،ایران

چکیده

در این پژوهش اثر افزودنی­هایی بر پایه سیتریک اسید، سدیم تری پلی فسفات، سدیم هگزا متافسفات، سدیم پلی اکریلات، کلسیم نفتالین سولفونات و بالاخره پلی کربوکسیلات اتر به عنوان روان­ساز بر ویژگی‌های رئولوژی جرم ریختنی بسیار کم سیمان Al2O3-SiCحاوی میکروسیلیس از نوع لرزه روان مورد بررسی قرار گرفت. جهت مطالعه این خواص، آزمایش­های تعیین جریان­یابی و کارپذیری جرم ریختنی انجام شد. نتیجه‌ها نشان داد که مؤثرترین روان ساز این نوع جرم­ها، افزودنی پلیمری پلی کربوکسیلات اتر است. در این کار پژوهشی برای نخستین بار، از افزودنیGLENIUM تجاری مورد مصرف صنعت ساختمان در صنعت دیرگداز نیز استفاده شد. مشخص شد که این افزودنی می­تواند به تنهایی افزون بر تأمین جریان­یابی مناسب، زمان کارپذیری مطلوب را برای جرم ریختنی بسیار کم سیمان Al2O3-SiCحاوی میکروسیلیس، بدون استفاده از کندکننده گیرش، فراهم سازد. مقدار بهینه این افزودنی نیز تعیین شد.

موضوعات

عنوان مقاله [English]

Selection of suitable Deflocculants for Microsilica-Containing ultra low-cement Al2O3–SiC castables

نویسندگان [English]

  • A.R. Abbasian 1
  • M.H. Amin 2
  • M.R. Rahimipour 2

1 Ceramic Engineering, Materials and Energy Research Institute, Tehran, Iran

2 Materials and Energy Research Institute, Tehran, Iran

چکیده [English]

In this research, the effect of seven deflocculants including sodium tripolyphosphate, sodium hexametaphosphate, RHEOBUILD, DARVAN 811D, GLENIUM and CASTAMENT FS20, on rheology behavior of Microsilica-Containing ultra low-cement Al2O3–SiC vibrationcastables, has been investigated. The behavior of various deflocculants in this castables was evaluated in terms of flowability and workability characteristics. It was concluded that GLENIUM is the best deflocculants for ultra low cement castables in Al2O3-SiC system, which itself gives simultaneous good flowability and workability at optimum content of 0.12 wt%. Therefore, with these results, a commercial deflocculant with the name of GLENIUM with better rheology properties was introduced to world refractory industrials.

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