Experimental Studies on Chemical Activation of Cementitious Materials from Smelting Slag of Copper and Nickel Mine

Wang, Lijuan; Wei, Yanke; Lv, Guocheng; Liao, Libing; Zhang, Dan

doi:10.3390/ma12020303

Cited by 8 publications

(6 citation statements)

References 41 publications

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“…When the curing age reaches 28 days, the Ca(OH) 2 phase disappears. The reason is that Ca(OH) 2 , the active SiO 2 and Al 2 O 3 in the smelting slag reflect the formation of hydrated calcium silicate and hydrated calcium aluminate 43 , These two substances play an important role in maintaining the early strength of the test block.…”

Section: Resultsmentioning

confidence: 99%

A new expansion material used for roof-contacted filling based on smelting slag

Hua

Wang

et al. 2021

Sci Rep

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The improper handling of smelting slag will seriously pollute the environment, and the unfilled roof of the goaf of the mine will threaten the safety of the mine. Expansion materials have attracted more and more attention because of their excellent properties. In this paper, copper-nickel smelting slag that has some active ingredients of gelling is used instead of traditional aggregate and some part of cement in order to reduce its pollution to the environment and its costs. For safety reasons, hydrogen peroxide was chosen as the foaming agent. Sodium silicate and hexadecyl trimethyl ammonium bromide (CTAB) are used as additives. Our results showed that after 28 days of curing, the material has better mechanical properties and the early compressive strength of the material was enhanced by sodium silicate. The efficiency of foaming was improved by CTAB. It also proves that copper–nickel smelting slag can be used in expansion material. At the same time, the utilization rate of the copper–nickel smelting slag of this formula can reach 70%, reduce its pollution to the environment.

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Section: Resultsmentioning

confidence: 99%

A new expansion material used for roof-contacted filling based on smelting slag

Hua

Wang

et al. 2021

Sci Rep

Self Cite

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“…When cement comes into contact with water, the dissolution of some phases takes place quite rapidly. However, when slag is mixed with water, hydration depends upon the breakdown and dissolution of glassy structure slag by hydroxyl ions [14]. Compressive strength at 28 days data was shown in Figure 3.…”

Section: Compressive Strengthmentioning

confidence: 99%

The effect of Basic Oxygen Furnace, Blast Furnace, and Kanbara Reactor Slag as Reinforcement to Cement Based Mortar

Harmaji,

Hardiansyah,

Widianingsih

et al. 2022

JPSE

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Slag is a waste from steelmaking industries that was released into the environment. Slag was used as reinforced material in mortar. Different types of slag, including Air Cooled Slag (ACS), Granulated Blast Furnace Slag (GBFS), Basic Oxygen Furnace Slag (BOFS), and Kanbara Reactor Slag (KRS), were used as a reinforcing material in this study. The composition of slag in the mixture on mortar was 10%, 20%, 30%, 40%, and 50%. The sample was made with a water-cement ratio (w/c) of 0.35, with the ratio of sand and cement being 1:1.5, respectively. Treatment of mortar sample at ambient temperature was applied. The mortar samples were left to cure until 3, 7, and 28 days, which performed a compression test. The results show that adding slag to the mortar enhanced the compressive strength of the pristine mortar. The highest strength was obtained by adding 10% slag at 28 days. The compressive strength of GBFS, BOFS, KRS, and ACS was 23.76 MPa, 23.28 MPa, 19.68 MPa and 17.48 MPa, respectively. Based on the XRD result, it was discovered that the mixture has more Calcium Silicate Hydrate Peak than Pristine mortar.

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“…Romania has produced about 20.295 million tons of nickel slag since 2000-2010 [1][2][3][4]. Copper-nickel smelting slag has certain Pozzolanic activity, which has been used to prepare mine-filling cementitious material to solve the stability of current mining filling material and high processing cost [5][6][7]. Materials such as fly ash, dolomite, and smelting slag have been used to replace cement to prepare composite cementitious materials [8][9][10][11].Moreover heavy metal elements in copper-nickel slag on the environmental impact of attracted the attention of scholars.…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Palygorskite on the Properties of Copper-Nickel Smelting Slag-Based Cementitious Materials

Zhu,

Wang,

et al. 2024

Preprint

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In order to study the feasibility of copper-nickel smelting slag（CNSS） and palygorskite for large-scale consumption and utilization in the field of mine filling, gellable composite materials were prepared from copper-nickel smelting slag ,cement and palygorskite. The effects of palygorskite addition and curing time on the mechanical properties and microstructure of copper-nickel smelting slag-based cementitious materials were studied in detail. The results showed that the addition of palygorskite had a positive effect on the curing of the cemented filler of the non-ferrous smelting slag by promoting the early hydration reaction. palygorskite also affected the mechanical properties of the cementitious materials with different maintenance times and the ability to cure heavy metals. The strength of gellable composite materials reaches 23.05MPa when 1% palygorskite, 50% of copper-nickel smelting slag and 48% cement were used, which meet the standards requirements of filling materials for mine goaf. The addition of 1% palygorskite can improve the ability of cementitious materials to solidify heavy metals to realize the economic utilization of solid waste in mining areas.

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Experimental Studies on Chemical Activation of Cementitious Materials from Smelting Slag of Copper and Nickel Mine

Cited by 8 publications

References 41 publications

A new expansion material used for roof-contacted filling based on smelting slag

A new expansion material used for roof-contacted filling based on smelting slag

The effect of Basic Oxygen Furnace, Blast Furnace, and Kanbara Reactor Slag as Reinforcement to Cement Based Mortar

Study on the Effect of Palygorskite on the Properties of Copper-Nickel Smelting Slag-Based Cementitious Materials

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