Valorisation of electric arc furnace steel slag as raw material for low energy belite cements

Iacobescu, Remus Ion; Koumpouri, D; Pontikes, Yiannis; Saban, R; Angelopoulos, G.N.

doi:10.1016/j.jhazmat.2011.09.024

Cited by 97 publications

(37 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…On the other hand, efforts have been dedicated to designing lowcarbon cement. Incorporation of industrial wastes, such as, waste glasses (Shi and Zheng, 2007), recycled concrete waste (Gastaldi et al, 2015;Oh et al, 2014), oil-based mud (Abdul-Wahab et al, 2016;Bernardo et al, 2007), arc furnace steel slag (Bernardo et al, 2007;Iacobescu et al, 2011) and contaminated soil (Navia et al, 2006) into the clinker process, are found to be feasible to reduce the CO 2 emissions of cement manufacturing.…”

Section: Introductionmentioning

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

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

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

View full text Add to dashboard Cite

show abstract

“…Gao et al (2014) found that replacing carbonatecontaining materials with non-carbonate materials and changing the clinker ratio are primary solutions for reducing natural resource consumption and process emissions. Over the years, the recycling of waste, such as building material waste (Oh et al, 2014), steel slag (Iacobescu et al, 2011), sugar filter mud (Li et al, 2014b), sewage sludge ash (Baeza-Brotons et al, 2014), tire rubber (Shu and Huang, 2014), into cement production has been generating increasing interest. The key strength of prior efforts was to identify the materials used, energy consumed, and emissions produced; effort was also made to determine alternative resources and waste for recycling.…”

Section: Introductionmentioning

confidence: 99%

Analysis of material flow and consumption in cement production process

Tianming

Shen

et al. 2016

Journal of Cleaner Production

120

View full text Add to dashboard Cite

a b s t r a c tCement production, which is highly dependent on the availability of natural resources, will face severe resource constraints in the future. This is especially true for the cement industry in China. Thus, the industry is focusing on reducing the consumption of natural resources at both the manufacturing and operational stages. The aim of this article is to improve the management of resources used in the cement production process and mitigate their environmental effects. First, material flow routes for the cement manufacturing process are established, after which three mass balances are built during the three production stages using actual plant data received from an existing cement manufacturing facility. Finally, the material efficiency of the units and stages as well as the waste recycle rates during these stages is calculated. The results show that approximately 2.48 t, 4.69 t, and 3.41 t of materials are required to produce a ton of the product in raw material preparation, clinker production, and cement grinding stages, and their waste rates are 63.31%, 74.12%, and 78.89%, respectively. The recycling rate of wastes during clinker production is remarkably higher than those during other manufacturing stages, wherein waste gases are directly discharged into the atmosphere. The material efficiency values for a raw mill, pyro-processing tower, rotary kiln, clink cooler, and cement mill are determined to be 36.69%, 34.24%, 39.24%, 29.76%, and 25.88%, respectively, whereas the waste recycling rates for these units are found to be 16.33%, 81.98%, 100.00%, 99.53%, and 0.00% respectively. These results will provide researchers with knowledge regarding the effectiveness and efficient use of natural resources in the cement sector. These important findings can also be used to influence the development of national and industrial policies in relation to the goal of achieving sustainable development in the cement industry.Crown

show abstract

“…In short, the cement industry is responsible for 5-7% of all anthropogenic emissions (10,11) world wide. In order to attain sustainable development for manufacture of PC, there has been a revival of intensive interests in exploring high belite cement with low lime saturation factor (LSF), which leads to an increase in belite amount and a decrease in alite phase content in the clinker (12)(13)(14)(15)(16).…”

Section: Introductionmentioning

confidence: 99%

Formation and early hydration characteristics of C2.75B1.25A3$ in binary system of C2.75B1.25A3$-C2S

et al. 2016

View full text Add to dashboard Cite

C 2.75 B 1.25 A 3 $ (2.75CaO•1.25BaO• 3Al 2 O 3 • SO 3 ) is one of the important minerals and it governdirectly the early-strength of belite-barium calcium sulphoaluminate cement. In this paper a binary system C 2.75 B 1.25 A 3 $-C 2 S is selected to investigate the formation of C 2.75 B 1.25 A 3 $. In the range of 1100 °C-1200 °C, the earlier formed C 2 S hinders the formation of C 2.75 B 1.25 A 3 $. On the contrary, when the temperature is in the range of 1200 °C-1350 °C, the initially formed C 2 S could provide a surface for the nucleation of C 2.75 B 1.25 A 3 $ and cut down the potential barrier (ΔG k* ) for the heterogeneous nucleation of C 2.75 B 1.25 A 3 $, which contributes to its formation. Moreover, at 1350 °C, the large amount of previously formed C 2 S benefits the extent of formation of C 2.75 B 1.25 A 3 $. The possible reason was that it could prevent sulfur evaporation. In early hydration age, AFm and AFt originating from C 2.75 B 1.25 A 3 $ hydration are found within 2 h and 12 h under 95% RH at 1 °C, respectively, whereas C 2 S is unhydrated at this moment. ) es una de las principales fases, y regula directamente la resistencia inicial del cemento. En este trabajo, se ha seleccionado el sistema binario C 2.75 B 1.25 A 3 $-C 2 S para investigar la formación de C 2.75 B 1.25 A 3 $. En el rango de 1100 °C-1200 °C, el C 2 S formado anteriormente impide la formación de C 2.75 B 1.25 A 3 $, mientras que cuando la temperatura está entre 1200 °C-1350 °C, el C 2 S proporcionaría una superficie de nucleación de C 2.75 B 1.25 A 3 $ reduciendo la barrera de potencial (ΔG k* ) para la nucleación heterogénea de C 2.75 B 1.25 A 3 $, lo que contribuye a su formación. Además, a 1350 °C, la gran cantidad de C 2 S for mado beneficia la formación de C 2.75 B 1.25 A 3 $, ya que podía prevenir la evaporación del azufre. En las primeras etapas de la hidratación (entre 2 y 12h y 95% HR a 1 ºC) se pueden encontrar AFM y AFt procedentes de la hidratación de C 2.75 B 1.25 A 3 $, mientras que el C 2 S permanece sin hidratar. KEYWORDS:

show abstract

Valorisation of electric arc furnace steel slag as raw material for low energy belite cements

Cited by 97 publications

References 15 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

Analysis of material flow and consumption in cement production process

Formation and early hydration characteristics of C<sub>2.75</sub>B<sub>1.25</sub>A<sub>3</sub>$ in binary system of C<sub>2.75</sub>B<sub>1.25</sub>A<sub>3</sub>$-C<sub>2</sub>S

Contact Info

Product

Resources

About