Effects of Synthetic Resin on Characteristics of Cement Clinker

Jeong Hwan Bang; Young Jun Lee; Do Young Kwon; Yong Sik Chu

doi:10.7844/kirr.2024.33.5.41

All Issue

2024 Vol.33, Issue 5 Preview Page Next Page

Research Paper

Effects of Synthetic Resin on Characteristics of Cement Clinker 시멘트 클링커 특성에 미치는 합성수지류의 영향 분석

31 October 2024. pp. 41-50

PDF XML

Abstract

Various alternative fuels are used together with bituminous coal in the cement clinker burning process. Alternative fuels such as synthetic resins can affect the clinker properties and can change the final cement properties. In this study, PP, PE, PS, and PVC were burned to analyze the effect on the clinker properties. The calorific value of PP and etc., was 9,000 to 11,000 kcal/kg, but PVC was about 6,000 kcal/kg. In addition, the pyrolysis process of PVC proceeded in two stages, and the start/end temperatures of pyrolysis were 169℃ and 573℃. The free-CaO content of the resin combustion clinker was about 0.2±0.06%, but the PVC combustion clinker showed a very high value of 7.11%. The chlorine content of the PVC combustion clinker was very high at 3.77%, and it was confirmed by XRD analysis that chlormayenite were formed as clinker crystal. However, the clinker burned with PP and etc., exhibited similar physical properties to Ref. clinker (Resin non-combustion). So, it was confirmed that it could be sufficiently used as a alternative fuel for clinker.

Keywords

Pyrolysis

Clinker

Chloride content

Chlormayenite

Polyvinyl chloride

시멘트 클링커 소성공정은 주연료인 유연탄과 함께 다양한 대체연료를 사용하고 있다. 합성수지 등의 대체연료는 클링커 물성에 영향을 줄 수 있으며, 최종 시멘트 물성도 변화시킬 수 있다. 따라서 본 연구에서는 PP, PE, PS 및 PVC 등을 클링커용 성구와 동시 소성하여 클링커 물성에 미치는 영향을 분석하였다. PP 등의 발열량은 9,000~11,000kcal/kg이었으나, PVC는 약 6,000kcal/kg 수준이었다. 또한 PVC의 열분해 과정은 2단계로 진행되었으며, 열분해 시작/종료 온도는 각각 169℃ 및 573℃이었다. PP 등의 수지 연소 클링커의 free-CaO 함량은 약 0.2±0.06%이었으나, PVC 연소 클링커는 7.11%로 매우 높은 값을 나타내었다. PVC 연소 클링커의 염소 함량은 3.77%로 매우 높았으며, XRD 분석을 통해 chlormayenite(11CaO․7Al₂O₃․CaCl₂) 결정 생성도 확인되었다. 하지만 PP 등을 연소한 클링커는 Ref. 클링커(수지 미연소)와 유사한 물성이 발현되어, 클링커 대체연료로 충분히 사용될 수 있다는 것을 확인하였다.

키워드

열분해

클링커

염소 함량

Chlormayenite

Polyvinyl chloride

References

Tae Bum Min, Hyun Kuk Choi, Hyeong Cheol Kim, et al., 2019 : Use of alternative fuels in cement manufacturing, Korea Recycled Construction Resources Institute, 14(1), pp.17-21.

Jae Won Choi, Kyung Mo Koo, Byeong know You, et al., 2021 : Study on the Correlation between Quality of Cement and Amount of Alternative Fuels used in Clinker Sintering Process, Korea Recycled Construction Resources Institute, 9(1), pp.75-84.

Korea Cement Association Resource Recycle Center Homepage, Current status of recycling of circulating resources in the domestic cement industry, http://recycling.cement.or.kr/contents/sub3_01.asp?sm=3_1_0, May 10, 2024.

International Finance Corporation, 2017 : Increasing the use of alternative fuels at cement plant : International best practice, pp.1-77.

Simon Jegou Saint-Jean, Ebbe Jons, Biels Lundgaard, et al., 2005 : Chlorellestadite in the preheater system of cement kilns as an indicator of HCl formation, Cement and Concrete Research, 35(3), 431-437.

10.1016/j.cemconres.2004.05.028

Schindler Anton K, Duke Steve R, Burch Thomas E, et al., 2012 : Alternative Fuel for Portland Cement Processing, Final Research Report, United States Department of Energy.

Anjan Chatterjee, Tonbo Sui, 2019 : Alternative fuels-Effects on clinker process and properties, Cement and Concrete Research, 123, pp.1-19.

10.1016/j.cemconres.2019.105777

Korea Packing Recycling Cooperative, 2015 : Characteristics and types of plastic, pp.2-3.

Hi Youl Kim, Tae Young Che, Ju Won Park, et al., 2021 : A study on the Characteristics of the pyrosis for the PE, PP, PVC, RPF by using TGA, The Korean Society for New and Renewable Energy, Autumn Conference, pp.637-641.

Paul Stutzman, Alan Heckert, Amelia Tebbe, et al., 2014 : Uncertainty in Bogue-calculated phase composition of hydraulic cements, Cement and Concrete Research, 61, pp.40-48.

10.1016/j.cemconres.2014.03.007

Industrial Standards Deliberation Committee, 2018 : Fly ash, KS L 5405, 12th edition, Korean Standards & Certification, pp.15-16.

Young Jun Lee, Nam Il Kim, Jeong Hoon Cho, et al., 2021 : A Study on the Characteristics of Clinker and Cement as Chlorine Content, Resources Recycling, 30(5), pp.10-16.

10.7844/kirr.2021.30.5.10

Donald H. Campbell, 2000 : Microscopical examination and interpretation of portland cement clinker, 2nd Edition, pp.46-49, PCA, Washington.

Young Jun Lee, Woo Sung Yum, Sung Kwan Seo, et al., 2023 : Effects of IM and Chlorine Contents on Cement Clinker, Resources Recycling, 32(5), pp.62-69.

10.7844/kirr.2023.32.5.62

Tae Yeon Kim, Nam Il Kim, Yong Sik Chu, 2020 : Burnability and mineral properties of clinker added chlorine, Resources Recycling, 29(6), pp.48-56.

10.7844/kirr.2020.29.6.48

Information

Publisher :The Korean Institute of Resources Recycling
Publisher(Ko) :한국자원리싸이클링학회
Journal Title :Resources Recycling
Journal Title(Ko) :자원리싸이클링
Volume : 33
No :5
Pages :41-50
Received Date : 2024-08-22
Revised Date : 2024-10-08
Accepted Date : 2024-10-10
DOI :https://doi.org/10.7844/kirr.2024.33.5.41

Resources Recycling ISSN:2765-3439(Print) 2765-3447(Online) 자원리싸이클링

All Issue