Utilization of nickel slag as raw material in the production of Portland cement for road construction

Wu, Qisheng; Wu, Yang; Tong, Weihong; Ma, Hang

doi:10.1016/j.conbuildmat.2018.10.109

Cited by 66 publications

(24 citation statements)

References 12 publications

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“…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. Moreover, the initial setting time and final setting time of the cement were 132 min and 185 min, respectively, and the compressive strength of the cement reached 52.3 MPa at the curing age of 28 days, which were in accordance with ordinary Portland cement.…”

Section: Introductionmentioning

confidence: 93%

“…Ordinary Portland cement has become an indispensable building material in the construction industry with the rapid development of industrialization [1,2]. Cement production in China reached 2.316 billion tons in 2017 [3]. Large quantities of natural materials such as limestone, bauxite, clay, sandstone, and gypsum have been consumed in the cement industry.…”

Section: Introductionmentioning

confidence: 99%

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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: 93%

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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“…In recent years, research has been conducted on the use of nickel slag to prepare cementitious materials or as a substitution for fine aggregate sand in concrete [9,10]. To reduce the cost of nickel production, molten tailings are poured directly in the factory, and the tailings are slowly cooled by air.…”

Section: Introductionmentioning

confidence: 99%

Alkali Activation of Copper and Nickel Slag Composite Cementitious Materials

Zhang

Zhi

et al. 2020

Materials

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Alkali-activated copper and nickel slag cementitious materials (ACNCMs) are composite cementitious materials with CNS (copper and nickel slag) as the main materials and GGBFS (ground-granulated blast-furnace slag) as a mineral admixture. In this paper, the activity indexes of CNS with different grinding times were studied using CNS to replace a portion of cement. NaOH, Na2SO4, and Na2SiO3 activators were used to study the alkaline solution of the CNS glass phase. The effects of the fineness of CNS and the type of activator on the hydration of ACNCMs were investigated via physical/mechanical grinding and chemical activation. The hydration products of ACNCMs were analyzed via XRD, SEM, FT-IR, TG, and MIP. The results of the study revealed that the activity indexes of CNS ground with different grinding times (10, 30 and 50 min) were 0.662, 0.689, and 0.703, respectively. When Na2SiO3 was used as the activator, the glass phase dissolved the most Si4+, Al3+, and Ca2+, and the respective concentrations in the solution were found to be 2419, 39.55, and 3.38 mg/L. Additionally, the hydration products of ACNCMs were found to have a 28-day compressive strength of up to 84 MPa.

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“…The nickel slag is generally composed of more than 20 wt% content of iron, more than 0.05 wt% content of Ni, and more than 0.05 wt% content of Cu et al This nickel slag is an unnatural ore, and the relationship between the composition and distribution of the mineral components in the nickel slag is extremely complex [4][5][6]. The Fe component of the nickel slag mainly exists in the fayalite phase and it's hard to separate for iron and silicon [7,8], which led to the failure of conventional utilization methods, such as hydrometallurgy, and direct utilization, to realize the resource utilization of the nickel slag. Therefore, the development of new technologies for reutilizing the nickel slag is urgently needed since nickel and iron resources depends heavily on long-term imports in China.…”

Section: Introductionmentioning

confidence: 99%

Effect of Roasting Temperature on Phase Transformation in Co-Reduction Roasting of Nickel Slag

Cao

Chen

Tian

et al. 2020

Metals

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Nickel slag and blast furnace dust comprise a large part of solid waste produced by the metallurgical industry. In this study, a novel method of co-reduction roasting followed by grinding/magnetic separation was proposed to collaboratively reutilize nickel slag and blast furnace dust. The nickel slag was combined with blast furnace dust to produce a Ni-Fe alloy containing Cu component by using the proposed method. In addition, the blast furnace dust acted not only as a reductant but also as an Fe resource. Results in this work showed that 81.62% Fe and 89% Ni could be recovered from nickel slag and blast furnace dust, and a Ni-Fe alloy product with 93.03 wt% Fe, 0.86 wt% Ni, and 0.49 wt% Cu could be obtained under optimal conditions in this study. The effect of roasting temperature on phase transformation was characterized and analyzed by XRD and SEM-EDS. The results illustrated that roasting temperature was considered as the main influence to regulate the mineral phase transformation and microstructural change in roasted product. The minerals in the nickel slag finally transformed iron and augite from fayalite containing magnesium and magnetite after the disappearance/transformation of the mineral phase. The Fe-bearing minerals were first reduced in situ position of structure into metallic Fe particles and then grown into a Ni-Fe alloy with Cu of chain structure. The new structure, instead of the original structure, formed the homogeneous slag phase and Ni-Fe alloy with Cu component.

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Utilization of nickel slag as raw material in the production of Portland cement for road construction

Cited by 66 publications

References 12 publications

Preparation of Portland Cement with Gold Ore Tailings

Preparation of Portland Cement with Gold Ore Tailings

Alkali Activation of Copper and Nickel Slag Composite Cementitious Materials

Effect of Roasting Temperature on Phase Transformation in Co-Reduction Roasting of Nickel Slag

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