1. Introduction. China has the largest output of steel and iron in the world (Zhang et al., 2022).In 2021, China's average annual pig iron output arrived at about 869 million ton (Stewart et al., 2021) and crude steel arrived at about 1.03 billion tons (Zhao et al., 2022).Meanwhile, the output of steel solid waste keeps at a high level and generally …
Copper slag, a waste solid produced in the copper smelting process, is a high-quality secondary resource with huge output. The recycling and utilization of copper …
In this article, we summarize and compare different LIB recycling techniques. Using data from CAS Content Collection, we analyze types of materials recycled and methods used during 2010–2021 using …
Copper slag, a waste solid produced in the copper smelting process, is a high-quality secondary resource with huge output. The recycling and utilization of copper slag is of great interest because it avoids the loss of valuable metals and the threat of harmful metals, and saves a lot of natural resources and energy. This paper firstly …
Table 1 Chemical composition of OPC and CS/mass fraction,% Composition CaO MgO Al 2O 3 SiO 2 Fe 2O 3 SO 3 P 2O 5 Na 2OK 2O CuO OPC 60.71 0.88 5.20 21.18 4.44 3.59 0.10 0.12 0.71 0.04
A 4000 m 2 steel slag (SS) bed was constructed in the brackish water area for water quality remediation in 2017. This study demonstrates the ability of SS to stimulate carbon sequestration based on one-year pilot and in situ SS beds. The pilot SS bed increased the soil organic matter (SOM) content by 5.1 wt %, sequestering sewage …
... These solid wastes are usually disposed of in specific landfills, and this management causes serious waste of land resources and environmental problems [5]. …
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).
Materials. The smelting slag used in this study was obtained from a copper plant in China. Mineralogical analysis, performed using scanning electron microscope (SEM) and energy dispersive X-ray spectroscope (EDS), polarizing microscope and X-ray diffraction (XRD), indicated that fayalite (Fe 2 SiO 4) and magnetite (Fe 3 O 4) phases …
Slag is also called molten slag. The melt that floats on the surface of liquid substances such as metals during the pyrometallurgical process is composed mainly of oxides (silicon dioxide, aluminum oxide, …
According to statistics, cumulative stockpiles of copper slag in China are more than 300 million tons. Copper slag not only contains a large amount of Fe but is also rich in various valuable metal elements such as Cu, Pb, Zn, and Co, which is a valuable secondary resource . The effective recovery of copper and iron resources in copper …
Copper Slag (CS) is a solid waste produced during the industrial smelting of copper (Gorai et al., 2003).The current pyrometallurgical copper smelting process is mainly through the Ausmet furnace (Fig. 1); the furnace slag goes through the flotation process to obtain copper matter, yielding a composition of CS corresponding to 30–40 % of Fe, …
Materials. The raw materials used in this study mainly included copper slag and secondary aluminum dross (Figures 1(a) and (b)), which were collected from Zijin Copper Co., Ltd. (Fujian, China) and Zhengzhou Aluminum Co., Ltd. (Henan, China), respectively. The chemical compositions of these two industrial wastes are listed in …
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the options for dust and residue recycling to the. ... Metallurgical integrated plants, excluding China 10, 11, 17 ... 752 MT of copper slag was produced worldwide during the period 1999-2019 with ...
The metallurgical recycling of iron and copper from copper slag mainly depends on a transformation from nonmagnetic iron components (fayalite) into magnetite and sedimentation of metallic copper to the bottom of slag at an appropriate oxidising …
Cement production causes 7.5% of global anthropogenic CO2 emissions, arising from limestone decarbonation and fossil-fuel combustion1–3. Current decarbonation strategies include substituting ...
This inert slag can also be used for land filling, for making of road and in construction works like embankment for rivers, etc., Converter slag (0.36 kg/kg of copper) produced from SWIL and slag (1.6 kg/kg of copper) from Birla copper (Sharma, 1998a, Sharma, 1998b) is granulated and sold out to the construction companies for road …
DOI: 10.1016/J.JECE.2021.105132 Corpus ID: 234029423; Copper slag: The leaching behavior of heavy metals and its applicability as a supplementary cementitious material @article{He2021CopperST, title={Copper slag: The leaching behavior of heavy metals and its applicability as a supplementary cementitious material}, author={Rongxing He and …
Copper smelting is a major source of copper production, generating significant amounts of slag. In 2022, China produced over 11,000 kilotons of refined …
The plant uses the rainwater that falls on the landfill. This rainwater collects in the leachate treatment facility where any pollutants are removed. Once cleaned, the water is used in the mills for grinding the slag and spent refractories before being pumped back to the leachate facility after the dewatering stage so that it can be cleaned again.
Turning waste into wealth: Synergistic recovery of metal from copper slag. Copper smelting is a major source of copper production, generating significant amounts of slag. In 2022, China produced over 11,000 kilotons of refined copper, leading to 2.2 to 3 tons of slag per ton of copper produced. This slag contains valuable metals like copper …
A field experiment was conducted to study migration of the elements from the copper smelting slag recycling waste into high-moor peat and lawn grasses. The waste was obtained by crushing the cast slag (particle size 0.05 mm) followed by flotation extraction of copper concentrate. The waste was introduced into lime-neutralized peat …
This paper presents a review of copper slag as a potential resource for cobalt and copper metals for a circular economy. An overview of the chemical and …
13 Recycling of steelworks slag in China in 2017, [5] ... The three most important trends for slag recycling relate to further investments in granulation plants for blast furnace slag, the increase in slag trading with separate slag grinding plants and the increasing use of steelworks slag as an additive for the concrete industry. ...
Air-cooled and granulated copper slags have several favourable mechanical properties for use as aggregates in construction such as excellent soundness characteristics, excellent abrasion resistance and good stability (Gorai et al., 2003).These properties of copper slag make it suitable as a partial or full replacement for Portland …
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Global copper slag (CS) emissions reached 57.2 million tons in 2021. Despite the increasing reuse of CS, the treatment of CS is still dominated by landfill so far, which not only occupies land resources but also causes damage to the environment. The application of CS to cement-based materials (CBMs) is one of the main approaches to …
cessary to explore new slag recycling technologies based on the distinct physical or chemical properties of the slag. Japan and China are two leading steel producing coun-tries. The mass production of crude steel is accompanied by large quantities of slags. Great efforts have been made in both countries to decrease slag emission or promote slag ...
contaminated copper slag has to be properly treated or washed to meet certain recycling criteria (as listed in the next section), before it can be further used for other applications. The amount of washed copper slag available for use is estimated to be 0.4 million tons per year. In Singapore, a typical spent copper slag recycling and ...