MICROSTRUCTURE CHANGE IN DYNAMIC CALCINATION AND SINTERING OF CARBIDE SLAG

CHENG Jun; ZHOU Junhu; LIU Jianzhong; ZHOU Zhijun; CAO Xinyu; CEN Kefa

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MICROSTRUCTURE CHANGE IN DYNAMIC CALCINATION AND SINTERING OF CARBIDE SLAG

更新时间：2025-12-10

- MICROSTRUCTURE CHANGE IN DYNAMIC CALCINATION AND SINTERING OF CARBIDE SLAG
- CIESC Journal Issue 7, Pages: 984-988(2003)
- 作者机构：
  
  浙江大学能源洁净利用与环境工程教育部重点实验室,浙江,杭州,310027
- 作者简介：
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  CLC：
- Online First：25 July 2003，
  
  Published：25 July 2003
- 稿件说明：
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CHENG Jun, ZHOU Junhu, LIU Jianzhong, et al. MICROSTRUCTURE CHANGE IN DYNAMIC CALCINATION AND SINTERING OF CARBIDE SLAG[J]. CIESC Journal, 2003, (7): 984-988.
DOI：

CHENG Jun, ZHOU Junhu, LIU Jianzhong, et al. MICROSTRUCTURE CHANGE IN DYNAMIC CALCINATION AND SINTERING OF CARBIDE SLAG[J]. CIESC Journal, 2003, (7): 984-988. DOI：

摘要

利用管式电炉、X射线衍射仪、压汞仪和SEM扫描电镜研究了电石渣在1200℃高温下动态煅烧及烧结过程中的微观结构变化.发现电石渣主要由含量大于80%的Ca (OH)2以及少量CaCO3、α-SiO2和α-Fe2O3晶相组成，高温煅烧后其主要晶相变成CaO.在1200℃下煅烧及烧结过程中，随时间增加电石渣的平均孔径逐渐增大，比表面积逐渐减少，总孔容积先增大后减少.高温长时间烧结后，电石渣表面由许多膨胀变形的类哑铃形CaO晶粒结构组成，且大小均匀、排列有序、边界明显.

Abstract

The microstructure change in the dynamic calcination and sintering of carbide slag is studied at a high temperature of 1200℃ on a tubular electric furnace with X-ray powder diffractometer

mercury intrusion porosimeter and scanning electronic microscope(SEM). It is found that the main crystal composition of raw carbide slag

Ca (OH)2

turns to CaO after calcination at a high temperature. The mean pore diameter of carbide slag increases and the specific surface area decreases all along with increasing experimental time

while the total pore volume firstly increases and then decreases. After intense sintering

the surface of carbide slag is composed of many swelled dumbbell-like CaO particles

similar in particle diameters and arrayed in order.

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