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دانلود مقاله Manufacture of Modified Protective Coating for internal surfaces of furnaces(refractory) فایل ورد (word) دارای 17 صفحه می باشد و دارای تنظیمات در microsoft word می باشد و آماده پرینت یا چاپ است

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سال انتشار: 1393
محل انتشار: چهارمین کنفرانس مشعل و کوره های صنعتی
تعداد صفحات: 17
چکیده:

In this work, coal residue (pitch) was used to produce an inexpensive protective coating. The residue is primarily rehabitated for just to be suitable for use as a coating material (reference coat) by dissolving it in benzene in a ratio of Pitch/Solvent(P/S) = 3:1 by weight . The reference coating was then mixed with polyurethane (commercial type) in percentages ranging from 5 to 15 % by weight of the solid tar pitch . Well mature mortar cubes (7x7x7cm) with a (w/c =0.4) and sand-cement (s/c= 2.75)were cast and covered with the prepared coatings. The cubes were then soaked individually in tap water , MgCl2-5% conc. and H2SO4- 3.0% conc. for different periods of time. The last two reagents represent sea water and 5 years complete immersion in sewage water respectively. The effect of reagents on the compressive strength , water retention and weight was measured for the cubes. The results revealed that, all prepared coatings gave satisfied physical characteristics. Addition of PUR up to 10% by weight of coal residue produced coating materials with the most favorable physical and chemical behavior.

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