Extracting Soluble Calcium from Roasting Quicklime with Ammonium Chloride

doi:10.12068/j.issn.1005-3026.2019.10.010

Journal of Northeastern University Natural Science ›› 2019, Vol. 40 ›› Issue (10): 1419-1423.DOI: 10.12068/j.issn.1005-3026.2019.10.010

• Materials & Metallurgy • Previous Articles Next Articles

Extracting Soluble Calcium from Roasting Quicklime with Ammonium Chloride

NING Zhi-qiang， SANG Chun-yuan， XIE Hong-wei， SONG Qiu-shi

School of Metallurgy， Northeastern University， Shenyang 110819， China.

Received:2018-12-14 Revised:2018-12-14 Online:2019-10-15 Published:2019-10-10
Contact: NING Zhi-qiang
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Abstract

Abstract: The calcium oxide was extracted by aqueous leaching roasted clinker of ammonium chloride and quicklime， and the effects of the roasting temperature， roasting time and molar ratio of ammonium chloride to quicklime on the extraction ratio of calcium oxide were studied to achieve a high value-added utilization for quicklime. The optimum roasting condition for extracting calcium oxide was obtained through the orthogonal tests. The results indicate that when the roasting temperature is 250℃， the roasting time is 90min， and the mole ratio of ammonium chloride to quicklime is 2.2∶1， the optimum roasting process can be achieved and the extraction ratio of calcium oxide is up to 97.26%. After differential thermal analysis， the process of roasting quicklime with ammonium chloride can be generally divided into three steps.

Key words: ammonium chloride, limestone, quicklime, calcium oxide, calcium chloride

CLC Number:

TF111

NING Zhi-qiang， SANG Chun-yuan， XIE Hong-wei， SONG Qiu-shi. Extracting Soluble Calcium from Roasting Quicklime with Ammonium Chloride[J]. Journal of Northeastern University Natural Science, 2019, 40(10): 1419-1423.

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Extracting Soluble Calcium from Roasting Quicklime with Ammonium Chloride

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