Articles & Issues
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
- This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright © KIChE. All rights reserved.
All issues
Cement Clinker 분쇄조제 선택에 관한 연구
A Study on Selecting Crushing Aid of Cement Clinker
HWAHAK KONGHAK, October 1983, 21(5), 245-252(8), NONE
Download PDF
Abstract
Cement Clinker의 분쇄조제 선택방법을 제시하기 위하여, Cement Clinker 분쇄시 분쇄조제로서 유기용매를 기상으로 첨가시킬 때 분쇄능률이 증가되는 원인을 현상론적으로 규명하고자 Cement Clinker와 유기용매증기 간의 흡착현상을 B.E.T. 실험방법으로 연구하였다.
그 결과는 다음과 같다.
(1) 유기용매를 분쇄조제로 사용한 분쇄실험에서의 분쇄조제를 첨가한 경우와 안한 경우와는 분쇄능율의 차가 나기 시작하는 분쇄시간 6시간 이후부터 자유표면에너지 감소량이 현저히 증가하기 시작하여 분쇄시간 8∼14시간 범위에서는 급격히 증가하였다.
(2) Cement Clinker에 대한 유기용매증기의 흡착은 Langmuir 흡착등온식을 갖는 단분자층흡착형태이었다.
(3) 분쇄시 첨가한 유기용매증기에 의한 Cement Clinker의 자유깊면에너지 감소량은 n-Propanol>iso-Propanol>Ethanol>Methanol>Acetone>Benzene>Acetaldehyde>di-Ethylether의 순으로 분쇄느의 순과도 같았다.
(4) 분쇄능의 증가 원인은 첨가된 유기용매증기가 Cement Clinker/표면에 흡착막을 형성하여 자유표면에너지를 감소시킴으로써 입자끼리의 이차미립자형성을 방지하는데 있다.
(5) 자유표면에너지 감소량이 분쇄능증가와 실험결과 아래 식과 같은 비례관계가 있었으므로 자유표면에너지 감소량을 측정함으로써 분쇄조제를 선택할 수 있다.
PS = 0.574π+4.1459
그 결과는 다음과 같다.
(1) 유기용매를 분쇄조제로 사용한 분쇄실험에서의 분쇄조제를 첨가한 경우와 안한 경우와는 분쇄능율의 차가 나기 시작하는 분쇄시간 6시간 이후부터 자유표면에너지 감소량이 현저히 증가하기 시작하여 분쇄시간 8∼14시간 범위에서는 급격히 증가하였다.
(2) Cement Clinker에 대한 유기용매증기의 흡착은 Langmuir 흡착등온식을 갖는 단분자층흡착형태이었다.
(3) 분쇄시 첨가한 유기용매증기에 의한 Cement Clinker의 자유깊면에너지 감소량은 n-Propanol>iso-Propanol>Ethanol>Methanol>Acetone>Benzene>Acetaldehyde>di-Ethylether의 순으로 분쇄느의 순과도 같았다.
(4) 분쇄능의 증가 원인은 첨가된 유기용매증기가 Cement Clinker/표면에 흡착막을 형성하여 자유표면에너지를 감소시킴으로써 입자끼리의 이차미립자형성을 방지하는데 있다.
(5) 자유표면에너지 감소량이 분쇄능증가와 실험결과 아래 식과 같은 비례관계가 있었으므로 자유표면에너지 감소량을 측정함으로써 분쇄조제를 선택할 수 있다.
PS = 0.574π+4.1459
In order to select proper crushing aid of cement clinker. The adsorption phenomena on cement clinker particles by the vapor of organic solvent have been studied by B.E.T. method.
Several kinds of organic solvent have been used as the adsorbent(i.e, Acetone, Benzene, Acetaldehyde, di-Ethylether, Methanol, Ethanol, iso-Propanol, n-Propanol)
Th results are as follows;
(1) When organic solvent aid was added in crushing, the crushing efficiency noticiablely increased for the range of 6-8 hours of crushing time, and the lowering of the free surface energy increased as the crushing efficiency increased, futhermore, for the range of 8-14 hours of crushing time, this value rapidly increased.
(2) Adsorption phenomena of these kinds of organic solvent follows the unimolecular adsorption pattern as the Langmuir theory.
(3) The lowering of the free surface energy on the cement clinker particles by organic solvent increases in the order in n-Propanol>iso-Propanol>Ethanol>Methanol>Acetone> Benzene>Acetaldehyde>di-Ethylether, as in the increment of crushing efficiency.
(4) The increment of crushing efficiency is attributed that the formation of adsorption film on the particles which causes the lowering of free surface energy prohibits the formation of secondary particles.
(5) By measuring the lowering of free surface energy on cement clinker particles, crushing aid of cement clinker can be selected, because the crushing efficiency increment is proportional to the decrease of free surface energy as follows;
PS = 0.574π+4.1459
Several kinds of organic solvent have been used as the adsorbent(i.e, Acetone, Benzene, Acetaldehyde, di-Ethylether, Methanol, Ethanol, iso-Propanol, n-Propanol)
Th results are as follows;
(1) When organic solvent aid was added in crushing, the crushing efficiency noticiablely increased for the range of 6-8 hours of crushing time, and the lowering of the free surface energy increased as the crushing efficiency increased, futhermore, for the range of 8-14 hours of crushing time, this value rapidly increased.
(2) Adsorption phenomena of these kinds of organic solvent follows the unimolecular adsorption pattern as the Langmuir theory.
(3) The lowering of the free surface energy on the cement clinker particles by organic solvent increases in the order in n-Propanol>iso-Propanol>Ethanol>Methanol>Acetone> Benzene>Acetaldehyde>di-Ethylether, as in the increment of crushing efficiency.
(4) The increment of crushing efficiency is attributed that the formation of adsorption film on the particles which causes the lowering of free surface energy prohibits the formation of secondary particles.
(5) By measuring the lowering of free surface energy on cement clinker particles, crushing aid of cement clinker can be selected, because the crushing efficiency increment is proportional to the decrease of free surface energy as follows;
PS = 0.574π+4.1459