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RU2008115438A - Сферические зерна корунда на основе плавленого оксида алюминия, а также способ их получения - Google Patents

Сферические зерна корунда на основе плавленого оксида алюминия, а также способ их получения Download PDF

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RU2008115438A
RU2008115438A RU2008115438/15A RU2008115438A RU2008115438A RU 2008115438 A RU2008115438 A RU 2008115438A RU 2008115438/15 A RU2008115438/15 A RU 2008115438/15A RU 2008115438 A RU2008115438 A RU 2008115438A RU 2008115438 A RU2008115438 A RU 2008115438A
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spherical corundum
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Жан-Андре АЛАРИ (FR)
Жан-Андре АЛАРИ
Себастьян ЗАХЗЕ (AT)
Себастьян ЗАХЗЕ
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Сентер Фор Эбрейсивз Энд Рифрэкториз Рисерч Энд Девелопмент С.А.Р.Р.Д. Гмбх (At)
Сентер Фор Эбрейсивз Энд Рифрэкториз Рисерч Энд Девелопмент С.А.Р.Р.Д. Гмбх
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Abstract

1. Сферические зерна корунда на основе плавленого оксида алюминия с диаметром зерен от 0,001 до 5 мм, максимальным содержанием оксида натрия 0,5 вес.% и максимальным содержанием оксида титана 0,5 вес.%, отличающиеся тем, что они имеют насыпной вес от 1,5 до 2,5 кг/л. ! 2. Сферические зерна корунда по п.1, отличающиеся тем, что они имеют удельную поверхность по БЭТ от 0,005 до 0,05 м2/г. ! 3. Сферические зерна корунда по п.1 или 2, отличающиеся тем, что у них прочность зерен на разрыв (по Vollstдdt) составляет ≥20 н, предпочтительно ≥40 н. ! 4. Сферические зерна корунда по п.1, отличающиеся тем, что они имеют объем пор, измеренный путем цифровой обработки изображения, менее 50%, предпочтительно менее 40%, особенно предпочтительно менее 30%. ! 5. Сферические зерна корунда по п.1, отличающиеся тем, что относительный объем, образованный микропорами размером менее 3 мкм, составляет у них больше 5%, предпочтительно больше 15%, в расчете на полный объем пор 30-40%. ! 6. Способ получения сферических зерен корунда по одному из пп.1-5, причем ! a) глинозем с добавкой от 0,1 до 1%, предпочтительно от 0,2 до 0,6% (от полного веса исходных материалов) кварцевого песка расплавляют в электродуговой печи, ! b) расплав разливают со скоростью разлива менее 100 кг/мин, ! c) плавленую струю разбивают сжатым воздухом при давлении от 3 до 10 бар, ! отличающийся тем, что плавку проводят в окислительных условиях.

Claims (6)

1. Сферические зерна корунда на основе плавленого оксида алюминия с диаметром зерен от 0,001 до 5 мм, максимальным содержанием оксида натрия 0,5 вес.% и максимальным содержанием оксида титана 0,5 вес.%, отличающиеся тем, что они имеют насыпной вес от 1,5 до 2,5 кг/л.
2. Сферические зерна корунда по п.1, отличающиеся тем, что они имеют удельную поверхность по БЭТ от 0,005 до 0,05 м2/г.
3. Сферические зерна корунда по п.1 или 2, отличающиеся тем, что у них прочность зерен на разрыв (по Vollstдdt) составляет ≥20 н, предпочтительно ≥40 н.
4. Сферические зерна корунда по п.1, отличающиеся тем, что они имеют объем пор, измеренный путем цифровой обработки изображения, менее 50%, предпочтительно менее 40%, особенно предпочтительно менее 30%.
5. Сферические зерна корунда по п.1, отличающиеся тем, что относительный объем, образованный микропорами размером менее 3 мкм, составляет у них больше 5%, предпочтительно больше 15%, в расчете на полный объем пор 30-40%.
6. Способ получения сферических зерен корунда по одному из пп.1-5, причем
a) глинозем с добавкой от 0,1 до 1%, предпочтительно от 0,2 до 0,6% (от полного веса исходных материалов) кварцевого песка расплавляют в электродуговой печи,
b) расплав разливают со скоростью разлива менее 100 кг/мин,
c) плавленую струю разбивают сжатым воздухом при давлении от 3 до 10 бар,
отличающийся тем, что плавку проводят в окислительных условиях.
RU2008115438/15A 2005-09-21 2006-09-13 Сферические зерна корунда на основе плавленого оксида алюминия, а также способ их получения RU2378198C1 (ru)

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DE102005045180.2 2005-09-21
DE102005045180A DE102005045180B4 (de) 2005-09-21 2005-09-21 Kugelförmige Korundkörner auf Basis von geschmolzenem Aluminiumoxid sowie ein Verfahren zu ihrer Herstellung

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US7491444B2 (en) * 2005-02-04 2009-02-17 Oxane Materials, Inc. Composition and method for making a proppant
US7867613B2 (en) 2005-02-04 2011-01-11 Oxane Materials, Inc. Composition and method for making a proppant
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US8323792B2 (en) 2012-12-04
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RU2378198C1 (ru) 2010-01-10
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ATE425122T1 (de) 2009-03-15
DE102005045180B4 (de) 2007-11-15
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SI1926686T1 (sl) 2009-06-30
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BRPI0614845A2 (pt) 2011-04-19
US20090162656A1 (en) 2009-06-25
US20070062699A1 (en) 2007-03-22
US7654323B2 (en) 2010-02-02
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