Assessing the Applicability of Fine Copper Slag in Road and Structural Fill Application

Soni, Jaykumar; Chokshi, Timir; Sharma, Rahul; Gujar, Rajesh; Jariwala, Nidhi; Pitroda, Jayeshkumar

doi:10.1016/j.matpr.2022.01.058

Cited by 6 publications

(3 citation statements)

References 4 publications

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“…This fact is favorable for the use of, for example, flotation to obtain a concentrate of non-ferrous metals [18,60]. The residue after non-ferrous metal extraction can effectively be used in the construction industry [27][28][29].…”

Section: Leaching Slag Testmentioning

confidence: 99%

“…The works [18,[22][23][24][25] provide extensive reviews on the known methods of utilizing slags from various metallurgical industries. Thus, a perspective direction for slag utilization could be their use in the construction industry [17,[26][27][28][29][30]. However, the direct use of slags in this area leads to a total loss of non-ferrous metals, and a series of technological features of this type of resource, which differ from natural ones, are complicated.…”

Section: Introductionmentioning

confidence: 99%

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Deep Processing of Dump Slag from the Copper-Nickel Industry

Kasikov

Shchelokova

Timoshchik

et al. 2023

Metals

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This work proposes an environmentally safe and economically feasible method of waste copper-nickel production slag utilization (Kola Mining-Metallurgical Company, Nornickel, Kola Peninsula, Russia). This process involves the decomposition of slag by diluted solutions of sulfuric acid (7–10 wt.% H2SO4) with a transfer in a solution of more than 70% silicon, 77% iron and 78% magnesium, and a concentration of non-ferrous metals in the residue (~70%). Copper ions were used in the leaching stage to prevent the release of hydrogen sulfide into the working atmosphere. Dehydration of the solution, followed by washing of water-soluble sulphates from silica, was carried out to separate silica from the leaching solution. The dehydration temperature effect on the silica structural characteristics was determined. The possibility of recovering non-ferrous metals from solutions after silica extraction by precipitation, in the form of copper cementite, and the sum of nickel and cobalt sulfides, was evaluated. Pigment-grade iron dioxide, magnesium sulphate and aluminium hydroxide were obtained by dehydration of the solution after extraction of base metals, calcination and other operations. Sulfuric acid leaching resulted in the disclosure of sulfide grains encapsulated in ferrosilicate, which is a favorable factor for flotation. The depleted residue can be successfully used in the construction industry.

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Section: Leaching Slag Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Deep Processing of Dump Slag from the Copper-Nickel Industry

Kasikov

Shchelokova

Timoshchik

et al. 2023

Metals

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“…The UCS of soft soil was ve times higher by adding 30% CS with a 10 M alkali-activated specimen. Soni et al (2022) replaced ne-aggregate with copper slag in road construction work and introduced copper slag as a road material application. Ekinci et al (2022) prepared different combinations of lime, copper slag, and cement materials to improve the UCS of marine clay.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of mechanical properties of problematic expansive soil using copper slag and its statistical validation

Jangid,

Grover

2023

Multiscale and Multidiscip. Model. Exp. and Des.

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This experimental research has been conducted to improve the mechanical properties of the problematic expansive soil using copper slag. The copper slag has been utilized to improve the Talab soil in Nainwa for the rst time. These mechanical properties are consistency limits, compaction, and strength properties. The swelling properties show that the collected soil has a high degree of expansive nature and low speci c gravity. Therefore, the copper slag has been added to the soil from 5-30% at a 5% variation by its oven-dry weight. The experimental results reveal that the free swell index of soil has decreased by 69.88% with the addition of 30% copper slag. It has also been observed that the liquid and plastic limits have been decreased. The plastic limit of soil decreases because copper slag takes place in voids. Due to this phenomenon, the maximum dry density of soil has been increased by 14.75% with the addition of 25% copper slag. The California bearing ratio (CBR) value of soil has been increased to 1.13% (soaked condition) and 3.8% (unsoaked condition) by adding 25% copper slag. This research introduces an empirical relationship between unsoaked and soaked CBR with a determination coe cient (R 2 ) of 0.8254. Moreover, it has been observed that the uncon ned compressive strength of soil has increased by 51.68% with the addition of 25% copper slag. Moreover, the value of R 2 for the experimental results obtained in this research is higher than the published experimental results, presenting the experimental study's accuracy and reliability. In addition, the analysis of variance (ANOVA) test accepts the research hypothesis for the present investigation.

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