Analysis of the parameters affecting energy consumption of a rotary kiln in cement industry

Atmaca, Adem; Yumrutaş, Recep

doi:10.1016/j.applthermaleng.2014.02.038

Cited by 118 publications

(56 citation statements)

References 13 publications

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“…Almost all fuels are consumed in the rotary kiln which is heart and the most energy consuming part of a conventional clinker production line (Atmaca and Yumrutaş , 2014). The CO 2 emission factor of fossil fuel combustion is calculated based on the specific fuel used in clinker production and the fuel CO 2 emission factor, which is expressed in Eq.…”

Section: Combustion-related Emissionmentioning

confidence: 99%

Modeling the dynamic mechanism between cement CO2 emissions and clinker quality to realize low-carbon cement

Cao

Shen

Zhao

et al. 2016

Resources, Conservation and Recycling

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a b s t r a c tTo devise low-carbon cement clinker product, in-depth knowledge about the variation mechanism of cement clinker CO 2 emissions is the prerequisite. The determinants of cement clinker CO 2 emissions in Chinese cement industry have been inquired by several researches recently. However, the impacts and abatement effect of clinker quality on cement clinker CO 2 emissions have not been identified yet. In technological sense, there lacks an integrated quantitative model that can elucidate the dynamic mechanism between cement clinker CO 2 emissions and clinker quality. To fill this gap, this paper devises a CO 2 emission accounting framework integrated with optimization model to explore the dynamic mechanism between cement clinker CO 2 emissions and clinker quality. Based on survey data of 2 typical cement clinker production lines in China, the accounting framework is validated with measured data. Through numerical simulation within this framework, a set of sensitivity analysis is conducted. The results indicate that if the target KH (lime saturation ratio) of both production lines climb from −5% to +5%, the process CO 2 emission factor will give rise to an increase of about 16.4 and 14.8 kg CO 2 /t clinker, respectively. With the same variation, the fuel CO 2 emission factors of two production lines will gain 17.2 and 13.7 kg CO 2 /t clinker, respectively. Obviously, controlled decrease of clinker quality can reduce CO 2 emission of clinker manufacturing. The results of sensitivity analysis are robust and highlight the remarkable role of clinker quality in both process and fuel emissions. Besides, the integrated framework can provide in-depth investigation into the dynamic mechanism between CO 2 emissions and the other determinants. Using this framework, cement plants or industry can develop optimal clinker quality standards on a quantitative basis to achieve low-carbon clinker.

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Section: Combustion-related Emissionmentioning

confidence: 99%

Modeling the dynamic mechanism between cement CO2 emissions and clinker quality to realize low-carbon cement

Cao

Shen

Zhao

et al. 2016

Resources, Conservation and Recycling

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“…………… (6) ROTARY KILN Where, ………… (7) ………… (8) ………… (9) …… ( In the above equations R TOTAL is the total heat resistance, A is the area of the rotary kiln = π x L x d while length of kiln is 75m and the dia. is 4.35m, k is the thermal conductivity of bricks lining (2.7-1.5 W/mK) [17] and kiln shell (27 W/mK) [16], h is the natural convective coefficient, E is the radiative heat transfer and can be found by the following equation [12].…”

Section: Gcv = 337 X C + 1442 (H -O/8) + 93 X S ………… (5)mentioning

confidence: 99%

Energy and Exergy Analysis of Rotary Cement Kiln

2016

IJAERD

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“…do processo e a necessidade de mitigação dos impactos ambientais [1][2][3][4][5]. Dessa forma, há um grande interesse na otimização do processo de produção de cimento [6,7].…”

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Modelagem matemática dos perfis de temperatura do gás, do sólido e da parede do forno e dos perfis de concentração das principais espécies químicas presentes no interior do forno rotativo empregado na produção de clínquer

et al. 2016

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Resumo O cimento é um dos materiais de construção mais utilizados no mundo, sendo o tipo mais comum conhecido como cimento Portland. O processo de fabricação do cimento envolve numerosas e complexas reações endotérmicas e exotérmicas que ocorrem a diferentes temperaturas, o que o torna não trivial. Dessa forma, há um grande interesse na otimização do processo de produção de cimento. A clinquerização é uma das principais etapas da fabricação de cimento e ocorre dentro de forno rotativo. Neste estudo, o processo de produção de clínquer é analisado em um forno rotativo de via seca que atua em contracorrente. Os principais fenômenos envolvidos na obtenção do clínquer são: evaporação da água livre residual da matéria-prima; decomposição do carbonato de magnésio; descarbonatação; formação da fase líquida composta por C3A e C4AF; formação do silicato dicálcico e silicato tricálcico. O principal objetivo deste estudo é a proposta de um modelo matemático que descreve de forma realística o perfil de temperatura e de concentração dos componentes do clínquer ao longo do forno rotativo, desenvolvido a partir de mudanças propostas a um trabalho da literatura. O modelo, composto por equações diferenciais parciais, foi adaptado e implementado em linguagem computacional no programa Mathcad. O modelo proposto foi satisfatório para a descrição do perfil de temperatura e concentração dos componentes do clínquer ao longo de um forno rotativo.

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Analysis of the parameters affecting energy consumption of a rotary kiln in cement industry

Cited by 118 publications

References 13 publications

Modeling the dynamic mechanism between cement CO2 emissions and clinker quality to realize low-carbon cement

Modeling the dynamic mechanism between cement CO2 emissions and clinker quality to realize low-carbon cement

Energy and Exergy Analysis of Rotary Cement Kiln

Modelagem matemática dos perfis de temperatura do gás, do sólido e da parede do forno e dos perfis de concentração das principais espécies químicas presentes no interior do forno rotativo empregado na produção de clínquer

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