Lu Zhong-yuan, Kang Ming, Jiang Cai-rong, Tu Ming-jing
Key laboratory for Advanced Building Materials of Sichuan Province, Southwest University of Science and Technology, Mianyang 621010, China.
Huan Jing Ke Xue. 2006 Apr;27(4):775-8.
To recycle calcium carbide residue effectively, calcium carbide of different crystal form, including global aragonite, calcite and acicular calcium carbide was synthesized. Both the influence of pretreatment in the purity of calcium carbide, and the influence of temperatures of carbonization reaction, release velocity of carbon dioxide in the apparition of calcium carbide of different crystal form were studied with DTA-TG and SEM. The result shows that calcium carbide residue can take place chemistry reaction with ammonia chlorinate straight. Under the condition that pH was above 7, the purity of calcium carbide was above 97%, and the whiteness was above 98. Once provided the different temperatures of carbonization reaction and the proper release velocity of carbon dioxide, global aragonite, calcite and acicular calcium carbide were obtained.
为有效回收电石渣，合成了不同晶型的电石，包括球形文石、方解石和针状电石。采用差示热分析-热重联用仪（DTA-TG）和扫描电子显微镜（SEM）研究了预处理对电石纯度的影响，以及碳化反应温度、二氧化碳释放速度对不同晶型电石出现的影响。结果表明，电石渣可与氯化铵直接发生化学反应。在pH值大于7的条件下，电石纯度大于97%，白度大于98%。一旦提供不同的碳化反应温度和适当的二氧化碳释放速度，即可获得球形文石、方解石和针状电石。
