循环利用电石渣制备活性氧化钙技术研究

耐火与石灰 ›› 2020, Vol. 45 ›› Issue (5): 5-8.

循环利用电石渣制备活性氧化钙技术研究

王新博周志华邵明凯

中信重工工程技术有限责任公司，洛阳471003

出版日期:2020-10-10 发布日期:2020-10-16

Study on preparation of activated calcium oxide from calcium carbide slag

Wang Xinbo Zhou Zhihua Shao Mingkai

CITICHIC Engineering & Technology Co., Ltd., Luoyang 471003, China

Online:2020-10-10 Published:2020-10-16

摘要/Abstract

摘要：

电石渣是电石水解获取乙炔气后以氢氧化钙为主要成分的废渣。本文研究了电石渣原料的特性以及电石渣颗粒较细（约80%的颗粒粒径在10~50 μm）、钙含量较高［Ca(OH)2含量≥90%］、水分偏高（约35%）、有害成分偏高的问题，并进行了一系列的试验研究。结果表明，煅烧出的CaO具有较高的活性，可以作为电石生产原料使用，但因其杂质偏多，需要与天然石灰石煅烧的活性石灰搭配以减少有害成分对电石炉的影响，搭配使用比例可达20%。本文根据电石渣的特性和试验结果提出了循环利用电石渣制备活性氧化钙的完整技术路线（悬浮煅烧）。

关键词: 电石渣, 氧化钙, 循环利用, 悬浮煅烧

Abstract:

Calcium carbide slag is a kind of waste residue with calcium dihydroxide as the main component after acetylene gas is obtained by hydrolysis of calcium carbide.In this paper,the characteristics of calcium carbide slag and the problems of fine particle size (about 80% particle size in 10~50 μm),high calcium content ［Ca(OH)2 content ≥90%］,high moisture content (about 35%) and high harmful composition of calcium carbide slag are studied,and a series of experimental studies were carried out.The experimental results show that the calcined CaO has high activity and can be used as raw material for calcium carbide production.However,due to its high impurity content,it is necessary to use CaO in combination with the calcined active lime of natural limestone to reduce the influence of harmful components on calcium carbide furnace,the proportion of the mixture can reach about 20%.Based on the characteristics of calcium carbide slag and the experimental results,a complete technical route (suspension calcination) for the preparation of active calcium oxide from calcium carbide slag is proposed.

Key words: Calcium carbide slag, CaO, Cyclic utilization, , Suspension calcination

中图分类号:

TQ16

王新博周志华邵明凯. 循环利用电石渣制备活性氧化钙技术研究[J]. 耐火与石灰, 2020, 45(5): 5-8.

Wang Xinbo Zhou Zhihua Shao Mingkai. Study on preparation of activated calcium oxide from calcium carbide slag[J]. REFRACTORIES & LIME, 2020, 45(5): 5-8.

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