Nm-class calcium carbonate carbonization process |
Title： |
| Nm-class calcium carbonate carbonization process |
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Application Number： |
200610144016 |
Application Date： |
2006/11/24 |
Announcement Date： |
2007/05/16 |
Pub. Date： |
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Publication Number： |
1962452 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
C01F 11/18 |
Applicant(s)： |
Tsinghua University |
Inventor(s)： |
Gai Guosheng, Yang Yufen, Lian Ensheng, Zhu Yong, Cai Zhenfang |
Key Words： |
Nm-class, calcium carbonate, carbonization process |
Abstract： |
The invention discloses a carbonizing technological method of nanometer calcium carbonate in the nanometer powder making technological domain, which comprises the following steps: allocating calcium hydroxide solution with density at 8-12%(m) and density at 1.04-1.07g/cm3; setting the starting temperature at 15-20Deg C; pouring into intermittent stirring reacting autoclave; stirring completely; circulating the slurry; introducing composite gas of carbon dioxide into circulating pipe and strong cutting blender to blend with circulating suspension liquid; entering into buffer tank or autoclave through circulating pipe; stopping reacting until the pH value of suspension liquid is 7-7.5; maintaining 30-70min for entire carbonizing course; setting the terminal temperature within 30-40Deg C. |
Claim： |
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Priority： |
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PCT： |
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