Reuse of water purification sludge as raw material in cement production

Chen, Huxing; Ma, Xing; Dai, HengJie

doi:10.1016/j.cemconcomp.2010.02.009

Cited by 104 publications

(54 citation statements)

References 12 publications

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“…Subject to the feedstock sources, it is unrealistic to change the siliceous material and limestone without taking account of economic cost. Nevertheless, the use of alternative raw material is feasible (Buruberri et al, 2015;Chen et al, 2010;Kajaste and Hurme, 2016;Shih et al, 2005;Zhang et al, 2014;Zhang and Mabee, 2016) and can reduce the process CO 2 emission (Gäbel and Tillman, 2005). Efficient utilization of industrial wastes in cement manufacturing plays a significant role in reducing the CO 2 emissions of cement industry (Zhang et al, 2013).…”

Section: Other Factors Affecting Co 2 Emission Factorsmentioning

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: Other Factors Affecting Co 2 Emission Factorsmentioning

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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“…The manufacture of Portland cement clinker consumes a large amount of raw materials (limestone, clay, etc.) as well as plenty of energy (850 kcal$kg -1 clinker) along with massive emissions of CO 2 (around 0.85 kg of CO 2 $kg -1 clinker) attributing to approximately 5% of global carbon emissions [3]. Municipal solid waste incinerators (MSWI) bottom ash composing of amorphous silica (usually more than 50 wt.%), alumina, iron oxide and calcium oxide is quite similar in composition with commonly used cement additives such as ground-granulated blast-furnace slag and pulverized coal fly ash (PFA) [2], suggesting that MSWI bottom ash has a significant potential to be reused as costeffective raw materials in cement production.…”

Section: Introductionmentioning

confidence: 99%

Characterization of chlorine and heavy metals for the potential recycling of bottom ash from municipal solid waste incinerators as cement additives

Wang

Takahashi

et al. 2016

Front. Environ. Sci. Eng.

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“…Table 1 shows the RIRcor values and the corresponding peaks of the phases analyzed in this study. The weight fraction of phase α in the XRPD specimen (Xα) can be obtained from the known Xcor, and thus in the original sample (X'α) can be computed by Equation (6).…”

Section: Other Analysesmentioning

confidence: 99%

“…Furthermore, reusing these wastes should be encouraged to save valuable resources and reduce disposal costs. Many researchers have studied the feasibility of wastes for cement production, such as waste marble dust [5], water purification sludge [6], sewage sludge [7], red mud from alumina plants [8], municipal solid waste incinerator ashes [9], and so forth [10,11]. In the iron and steel-making industry, the refining processes generate various kinds of slags, most of which contain a large amount of lime and/or silica.…”

Section: Introductionmentioning

confidence: 99%

Reusing Desulfurization Slag in Cement Clinker Production and the Influence on the Formation of Clinker Phases

Chen

Chang

2017

Sustainability

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Abstract:The purpose of this study was to investigate the reuse of desulfurization slag in cement clinker production and its influence on the formation of clinker phases. The desulfurization slag that mainly contained Ca and Si was identified as non-toxic, and thus it should be suitable to be reused in clinker production. The addition of desulfurization slag increased the melt phase during clinkerization, but the excess melt phase inhibited the formation of clinker phases. This could be attributed to the sulfur and fluoride derived from the De-S slag. At low desulfurization slag addition (5.4 wt %), the resulting clinker had a mineralogical composition similar to that of the reference clinker. The desulfurization slag added can lower the clinkerization temperature and increase the amount of Ca 3 SiO 5 at 1300 • C, which may be beneficial to energy conservation in clinker burning. Moreover, reusing desulfurization slag additionally has the potential to reduce the energy needed for clinker grinding.

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Reuse of water purification sludge as raw material in cement production

Cited by 104 publications

References 12 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

Characterization of chlorine and heavy metals for the potential recycling of bottom ash from municipal solid waste incinerators as cement additives

Reusing Desulfurization Slag in Cement Clinker Production and the Influence on the Formation of Clinker Phases

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