Approach to the management of magnesium slag via the production of Portland cement clinker

Li, Haoxin; Huang, Yuyan; Yang, Xiao‐Jun; Jiang, Zhengwu; Yang, Zhenghong

doi:10.1007/s10163-018-0735-4

Cited by 34 publications

(5 citation statements)

References 22 publications

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“…In this industrial test study, 1.8% calcium fluoride (CaF2) was added to the raw mixture to benefit from the reducing effect of the slagging (clinkerization) temperatures of the pellet raw mixture without affecting the magnesium metal production process. An excess of MgO and CaF2 leads to a decrease in C3S (tricalcium silicate) and the emergence of unconventional cement phases, namely α-C2S (alpha dicalcium silicate) and γ-C2S (gamma dicalcium silicate) [1]. (Bouregba et al, 2013) used 2% calcium fluoride in the raw meal mixture [12].…”

Section: Industrial Trial Studiesmentioning

confidence: 99%

“…Annually, approximately 60,000 tons of slag material are generated as waste and stored near the facility without undergoing any treatment. These wastes generated in magnesium production facilities in other countries are used as additives in cement production [1][2][3]. However, scientific studies have yet to be able to take these wastes beyond the use of additives in cement production.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Thermal Activation on the Mineralogical Structure of Magnesium Slag

Korkmaz

2024

IJCESEN

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Magnesium slag's production process is similar to the Portland cement production process. The raw material used is carbonate-containing dolomite, and is calcined in a rotary kiln at 850-900 oC. Afterwards, ferrosilicon and fluorite raw materials are added to the calcined material, they are ground together and turned into pellets, and then they are reduced at a temperature close to the firing temperature of Portland cement clinker (1250-1350 oC) to obtain crown magnesium and magnesium slag. The reduction time of pellet material in reduction furnaces is 12 hours. During this period, almost all of the magnesium minerals in the mixture material are reduced and taken as crown magnesium metal. The remaining material, described as magnesium production slag (reduction furnace waste), consists of Alite (C3S), Belite (C2S), Celite (C3A) and C4AF minerals contained in Portland cement clinker. Some of the minerals contained in Portland cement clinker in the rotary kiln are formed at temperatures below 1400 °C, which is the clinker firing temperature. The only difference other than the firing temperature is that after the Portland cement clinker is fired in the rotary kiln, the clinker is cooled rapidly, increasing the alite (C3S) crystals formed in its structure and preventing the alite minerals from turning back into belite (C2S) minerals. This study produced magnesium slags at different temperatures (1200-1350 oC) by thermal activation method in an industrial environment. The Bogue and XRD methods calculated the mineral phase amounts of the products produced.

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Section: Industrial Trial Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Thermal Activation on the Mineralogical Structure of Magnesium Slag

Korkmaz

2024

IJCESEN

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“…Sewage sludge [189][190][191][192][193][194][195][196], blast furnace slag [197][198][199][200][201][202], lime sludge [13,203,204], steel slag [201,205,206], stainless steel slag [207], basic oxygen furnace slag [208,209], calcium carbide slag [210], magnesium slag [211], water purification sludge [212], heavy metal-containing sludge [213], electric arc furnace slag [214], fly ash [197,198,200,[215][216][217][218][219][220][221][222], red mud [199,[223][224][225], oil-based mud [226,227], iron ore tailings [228,229], copper tailings [230], industrial ...…”

Section: Manufacturing Industrymentioning

confidence: 99%

A Review: Construction and Demolition Waste as a Novel Source for CO2 Reduction in Portland Cement Production for Concrete

Kaptan,

Cunha,

Aguiar

2024

Sustainability

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There is an increasing global recognition of the need for environmental sustainability in mitigating the adverse impacts of cement production. Despite the implementation of various carbon dioxide (CO2) mitigation strategies in the cement industry, such as waste heat recovery, the use of alternative raw materials and alternative fuels, energy efficiency improvements, and carbon capture and storage, overall emissions have still increased due to the higher production levels. The resolution of this matter can be efficiently achieved by the substitution of traditional materials with an alternative material, such as calcined clay (CC), construction and demolition waste (CDW), which have a significant impact on various areas of sustainable development, including environmental, economic, and social considerations. The primary objectives of employing CDW in the Portland cement production are twofold: firstly, to mitigate the release of CO2 into the atmosphere, as it is a significant contributor to environmental pollution and climate change; and secondly, to optimize the utilization of waste materials, thereby addressing the challenges associated with their disposal. The purpose of this work is to present a thorough examination of the existing body of literature pertaining to the partial replacement of traditional raw materials by CDW and the partial replacement of Portland cement by CDW and to analyze the resulting impact on CO2 emissions.

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“…Furthermore, there was no obvious difference in the physical and mechanical performances of the two cement clinkers. Li et al [8] pointed out that the burnability of the clinker of raw materials with less than 30% magnesium slag could be obviously improved. However, if the amount of magnesium slag in the raw materials was greater than 30%, it would have a negative effect on the cement's properties such as decreasing the content of C 3 S, decreasing the compressive strength, and extending the setting time.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Portland Cement with Gold Ore Tailings

Wang

Yao

Zhu

et al. 2019

Advances in Materials Science and Engineering

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e disposal of gold ore tailings (GTs) has been a very difficult problem for a long time. us, this study explored a new approach to the management of GTs by preparing Portland cement. Physical properties, reaction mechanisms, and hydration product types of cement prepared with GTs (C-GTs) and ordinary Portland cement (C-SS) were compared. X-ray diffraction (XRD), thermogravimetric (TG), and scanning electron microscope energy-dispersive spectroscopy (SEM-EDS) analysis techniques were used to study the mineralogical phases of the clinker and raw materials, hydration product types, and microtopography. e consistency, setting time, flexural strength and compressive strength values of the cement samples (C-GTs and C-SS), and burnability of the raw materials were also studied. e burnability analysis indicated that GTs provided a higher reactivity. e XRD results showed that the clinker phases of the C-GTs were C 3 S, C 2 S, C 3 A, and C 4 AF. e XRD, TG, and SEM-EDS results showed that the hydration products were flaky calcium hydroxide, rod-shaped ettringite, and granular C-S-H gels. Its compressive strength and flexural strength were, respectively, 30.4 MPa and 6.1 MPa at the curing age of 3 days and 59.1 MPa and 9.8 MPa at the curing age of 28 days, which were slightly higher than those of the C-SS. Furthermore, the results showed that the consistency, initial setting time, and final setting time for the two kinds of cement were similar, which further suggested that GTs could be used to prepare Portland cement.

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Approach to the management of magnesium slag via the production of Portland cement clinker

Cited by 34 publications

References 22 publications

Effect of Thermal Activation on the Mineralogical Structure of Magnesium Slag

Effect of Thermal Activation on the Mineralogical Structure of Magnesium Slag

A Review: Construction and Demolition Waste as a Novel Source for CO2 Reduction in Portland Cement Production for Concrete

Preparation of Portland Cement with Gold Ore Tailings

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