Preparation and characterization of Portland cement clinker from iron ore tailings

Young, G.; Yang, Gang

doi:10.1016/j.conbuildmat.2018.11.236

Cited by 102 publications

(22 citation statements)

References 13 publications

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“…Huang et al [4] prepared a cement clinker with municipal sewage sludge and found that the flexural strength and compressive strength of the cement sample at a curing age of 28 days were greater than 6.5 MPa and 42. 5 MPa, respectively. Young and Yang [5] synthesized cement clinkers with different proportions of iron ore tailings (0-20 wt.%) added to the raw materials instead of clay.…”

Section: Introductionmentioning

confidence: 92%

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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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Section: Introductionmentioning

confidence: 92%

“…5 MPa, respectively. Young and Yang [5] synthesized cement clinkers with different proportions of iron ore tailings (0-20 wt.%) added to the raw materials instead of clay. eir investigation indicated that the addition of 10% iron ore tailings did not change the mineralogical phases (C 3 S, C 2 S, C 3 A, and C 4 AF) of the clinker.…”

Section: Introductionmentioning

confidence: 92%

Preparation of Portland Cement with Gold Ore Tailings

Wang

Yao

Zhu

et al. 2019

Advances in Materials Science and Engineering

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“…However, special cement such as sulfobelite clinker, high-belite cementitious materials was prepared with tailings with a low SiO 2 content [21,85,86]. On the other hand, the raw meal within 10% high-magnesium and low-silicon iron ore tailings (IOT) addition sintered at 1420 ∘ C for one hour can produce better quality cement clinker than without IOT [81,87]. Besides, the leached heavy metals decreased considerably in clinker, so the cement clinker production by using tailings can help in the immobilization of heavy metals in tailings [21].…”

Section: Utilization Of Tailings For Cement Clinker Productionmentioning

confidence: 99%

Utilization of tailings in cement and concrete: A review

Gou

Zhou

Then

2019

Science and Engineering of Composite Materials

136

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One of the advantages of cement and the cement concrete industry in sustainability is the ability to utilize large amounts of industrial solid wastes such as fly ash and ground granulated blast furnace slag. Tailings are solid wastes of the ore beneficiation process in the extractive industry and are available in huge amounts in some countries. This paper reviews the potential utilization of tailings as a replacement for fine aggregates, as supplementary cementitious materials (SCMs) in mortar or concrete, and in the production of cement clinker. It was shown in previous research that while tailings had been used as a replacement for both fine aggregate and cement, the workability of mortar or concrete reduced. Also, at a constant water to cement ratio, the compressive strength of concrete increased with the tailings as fine aggregate. However, the compressive strength of concrete decreased as the replacement content of the tailings as SCMs increased, even whentailings were ground into smaller particles. Not much research has been dedicated to the durability of concrete with tailings, but it is beneficial for heavy metals in tailings to stabilize/solidify in concrete. The clinker can be produced by using the tailings, even if the tailings have a low SiO2 content. As a result, the utilization of tailings in cement and concrete will be good for the environment both in the solid waste processing and virgin materials using in the construction industry.

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“…[5][6][7][8] The most common mineral-based materials for cement and mortar substitution are limestone or chalk, clay, gypsum, and iron ore. 9,10 Agricultural wastes that show pozzolanic properties are also good candidates to substitute OPC. The European Parliament has the target to reduce the greenhouse gas emission up to 20% by 2020 compared to 199.…”

Section: Introductionmentioning

confidence: 99%

“…The alternative sources of materials currently used and investigated are mineral-based materials and construction wastes, agricultural wastes, biomass, and industrial by-products. [5][6][7][8] The most common mineral-based materials for cement and mortar substitution are limestone or chalk, clay, gypsum, and iron ore. 9,10 Agricultural wastes that show pozzolanic properties are also good candidates to substitute OPC. Some plant-derived agricultural wastes such as rice husk, sugar cane and corn cobs contain considerable amount of SiO 2 after they are burnt.…”

Section: Introductionmentioning

confidence: 99%

Vitrified and nonvitrified municipal solid wastes as ordinary Portland cement (OPC) and sand substitution in mortars

Sharifikolouei

Canonico²,

Salvo

et al. 2019

Int J Applied Ceramic Tech

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This work aims to evaluate the potential suitability of nonvitrified and vitrified bottom ashes to serve as substitute materials for both OPC and sand in mortars on an industrial scale. Three bottom ashes were selected as OPC substitutes: one was vitrified inside the incinerator plant (W1-C), one was carbonated under ambient conditions for 3 months (W2-C), and part of the carbonated bottom ash was further washed with Ca(OH)2 (W2-W-C). Composition and phases of the bottom ash sources were assessed by XRF and XRD, respectively. Thereafter, mortars were prepared by replacing 10, 20 or 30 wt% of OPC with these bottom ashes. It was shown that even though Ca(OH) 2 washing step (W2-W-C) led to an increment of the compressive strength in final mortars compared to the use of W2-C, it failed to reach the mechanical performance of OPC. On the contrary, the use of vitrified bottom ashes (W1-C) could lead to obtaining compressive strength comparable to that of standard mortar if added up to 10 wt%. Regarding the sand substitution, vitrified bottom ashes could reach suitable compressive strength when replacing 20 wt% of standard sand. The alkali aggregate reaction test confirmed the neutrality of substitution material added up to 50 wt%.

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Preparation and characterization of Portland cement clinker from iron ore tailings

Cited by 102 publications

References 13 publications

Preparation of Portland Cement with Gold Ore Tailings

Preparation of Portland Cement with Gold Ore Tailings

Utilization of tailings in cement and concrete: A review

Vitrified and nonvitrified municipal solid wastes as ordinary Portland cement (OPC) and sand substitution in mortars

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