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Base on the plentiful experience of producing and marketing of impact crusher, Sofol R&D institution…
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Adopting technology from the world, PY Series spring cone crusher has an excellent performance in secondary…
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A study published in Transactions of Nonferrous Metals Society of China. detailing a novel method for the recovery of. copper, lead, and zinc from copper smelting slag using a sulfurization-reduction approach.This innovation represents a significant stride in metallurgical waste management, with potential impacts on both industry practices …
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Conventional melting for disposing municipal solid waste incineration (MSWI) fly ash or bottom slag needed high temperature and consumed high energy. High calcium content in fly ash and high silicon content in bottom slag brought them high melting point, respectively.Based on the analysis of chemical composition and phase diagram, suitable …
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Leaching is a direct extraction method of vanadium from steel slag, including direct leaching,roasting-leaching and other related leaching methods (Chen et al., 2017; Xiang et al., 2018b). At present, roasting-leaching is the only steel slag treatment method that has been put into large-scale industrial production (Lee et al., 2021).
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Current drilling fluid and cuttings disposal methods are being challenged by an increasing number of federal, state and lo- cal regulatory agencies (Hanson and Jones, 1986; Hall and Spell, 1991 ). ... 3-12 Table 8 Solidification of processed oil-base cuttings from a Gulf of Mexico well 11 Slag concentration aging temperature 125 lb/bbl 250 lb ...
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Improper disposal of mining waste is still considered a global problem, and further details on the contamination by potentially toxic metals are required for a proper assessment. In this context, it is important to have a combined view of the chemical and biological changes in the mining dump area. Thus, the objective of this study was to …
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Two main production methods are involved (Fig. 1). In the iron ore-based process, pig iron is produced from oxidic iron ores in a blast furnace. ... Only small quantities end up in waste disposal sites or are used for landfilling. Unfortunately, this is not the case everywhere in the world, partly because there is a lack of suitable rules and ...
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Ash and slag disposal areas of Ukrainian thermal power plants accumulate large amounts of waste annually. Objectives. The aim of the present study was to analyze the composition of ash and slag wastes generated during combustion of coal at Ukrainian thermal power plants and the potential affects of disposal areas on the environment. Methods.
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A slag disposal method for disposing of slags produced in furnaces during iron or steel making processes comprises employing the steps of magnetic sorting of masses of crude slags of a size greater than a value ranging between 300 to 500 mm obtained from the furnaces into slags rich in iron (above about 50 to 60 percent) and slags not rich in iron …
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Slag is the by-product of iron- and steelmaking processes. Normally, around half to one tonne of slag would be generated for yielding one tonne of rolled iron or steel (Lobato et al. 2015).It was reported that the world steel production was 1.9 billion tonnes in 2016, which suggested that at least around 1 billion tonnes of slag is produced during …
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In recent years two methods have been developed to stabilize the free lime in slag and prevent volume expansion: air oxidation or carbothermic reduction. The first …
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Discuss potential environmental issues related to weathering of slag dumps. • Outline construction, secondary metal recovery, and environmental applications. • …
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Coal gasification fine slag (FS) is a typical solid waste generated in coal gasification. Its current disposal methods of stockpiling and landfilling have caused serious soil and ecological hazards. Separation recovery and the high-value utilization of residual carbon (RC) in FS are the keys to realizing the win-win situation of the coal chemical …
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Research effort continues to seek and identify EFW technologies alternative to incineration (Beyene et al., 2018) (Fig. 1), however, incineration remains as the workhorse of the EFW industry due to its efficiency and suitability for integration with electricity grid systems.Gasification, an alternative EFW technology, partially oxidises …
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Nickel smelting slag contains valuable metals including nickel and copper. Failure to recycle these metals wastes resources, and disposal of nickel slag in stockpiles results in environmental pollution. …
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The mining operation is a challenging field for human development. Deep underground mining has increased as a result of the lack of economic minerals close to the surface of the ground. Mining companies are now thinking of backfilling mine wastes to prevent mine collapse during later and deeper extraction stages due to safety and …
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A considerable amount (more than tens of millions of tons) of slag has been collected as discarded waste in the landfilled site of steelmaking company. Recovery of …
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As the leading industry of coal chemical industry, Coal gasification plays an important role in efficient and clean utilization of coal. It is a process in which solid fuels such as coal, coke, or semi-coke react with gasifying agents under high temperature and pressure to produce gaseous products and a certain amount of slag (Aprianti et al., …
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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 …
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Various remediation methods for mining waste have the potential to mitigate the challenges associated with slag disposal [12,13]. Recently, to maximize the utilization value of copper slag according to the environmental impact and decarbonization, the reduction of copper slag with hydrogen was proposed by Zhang et al. [ 14 ], studying …
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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. There are …
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Nickel smelting slag contains valuable metals including nickel and copper. Failure to recycle these metals wastes resources, and disposal of nickel slag in stockpiles results in environmental pollution. Nickel slag recycling is important, and metals can be recovered from slag by flotation. However, considering the complex forms in which …
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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 academic and patent literature sources.
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MSWI fly ash and lead–zinc smelting slag (LZSS) are solid wastes containing heavy metals and negatively impact the environment. This study synthesized MSWI fly ash-LZSS based alkali-activated cementitious material (AAFL) material for their co-disposal. The experimental results revealed that the compressive strength of AAFL …
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Since the application of slag mix at Prospect Auger in the Gulf of Mexico, excess whole mud discharge has been reduced by about 70% (4530 barrels per well). …
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the slag disposal urge engineers and researchers to explore the way which can massively use the slag. As the development of global economy, the need on ... treatment methods. Thermal and magnetic treatments are mostly applied technologies (Alanyali et al. 2009; Heikal et al. 2015; Reddy et al. 2006). Thermal
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The arsenic-alkali slag used in the study was obtained from an antimony smelting plant in Hunan province, China. The XRD pattern and chemical compositions of arsenic-alkali slag were shown in Fig. 1 and Table 1.According to Fig. 1, Na 3 SbO 4 is the main phase in the arsenic-alkali slag. Table 1 shows that the content of As, Sb, and …
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Co-disposal of municipal solid waste incineration fly ash and bottom slag: A novel method of low temperature melting treatment J Hazard Mater. 2020 Nov 2;124438. doi: 10.1016/j.jhazmat.2020.124438. Online ahead of print. Authors Guojing Wong 1 ...
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Explore 10 key methods for hazardous waste disposal, ensuring safety for both the environment and human health. ... The result is a significant reduction in volume, with the residues often taking the form …
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Converter off-gas, an important energy resource for steel industries, is one of the weak points in the recovery and utilization of secondary energy resources. To improve the level of recycling converter off-gas in steel plants, a novel approach to the recycle of CO2 separated from converter off-gas or other off-gas for the green slag splashing …
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Mexico stands on the precipice of environmental reform. The country is taking strides to reshape its waste management systems and align them with the …
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Slag is a ubiquitous byproduct of the iron- and steel-refining industries. In northwestern Indiana and northeastern Illinois, slag has been deposited over more than 52 km2 of land surface. Despite the widespread use of slag for fill and construction purposes, little is known about its chemical effects on the environment. Two slagdisposal sites …
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DOI: 10.1016/j.jhazmat.2020.124438 Corpus ID: 227159845; Co-disposal of municipal solid waste incineration fly ash and bottom slag: A novel method of low temperature melting treatment.
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Contact competent authorities or waste treatment companies for guidance on appropriate slag disposal methods. Provided below is a video demonstrating the proper process for slagging liquid aluminum: Proper slagging of aluminum liquid plays a vital role in obtaining high-quality end products in casting. By following the recommended steps and ...
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The "beach" is a dry area of dust particles. The second process is water infiltration (clarified or even partially untreated) and ingress of dissolved forms of toxic components of ash-slag into the groundwater and reservoirs outside the ash dump. Thus, ash and slag disposal areas of power plants are open systems within the fenced area.
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Abstract: Coal gasification fine slag (FS) is a typical solid waste generated in coal gasification. Its current disposal methods of stockpil-ing and landfilling have caused serious soil and ecological hazards. Separation recovery and the high-value utilization of residual carbon ... Gasification slag is divided into coarse slag (CS) and fine ...
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