· This paper discusses the possibility of utilizing the construction and demolition waste (CDW) as cemented recycled aggregate backfill (CRAB) materials in the underground mining industry. In this regard, several samples were prepared by mixing the recycled aggregates of CDW components and Portland cement and various tests were
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EAFSS has been considered for use as aggregate in standard concrete (Maslehuddin et al. 2003;Pellegrino and Gaddo 2009;Arribas et al. 2015;Rondi et al. 2016;Santamaría et al. 2018), in self
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Study on the Composition and Interface of Waste Silicon Slag After Secondary Refining Dan Qiao1 & Shuai Liang1 & JianGuo Zhao1 & XiuJing Peng1 & Yong Nie1,2 & YeXin Li1 & Yu Cui1 & Guoxin Sun1,2 Received: 1 April 2021 /Accepted: 2 July 2021 Abstract
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· In 2017, 71.6% (1206.9 million metric. tons) of the world steel was produced through the BOF route [1]. The impurities present in hot metal are removed in the form. of slag upon addition of fluxes
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· A production of pig iron has been conducted from crushing plant waste. The process of preparing pig iron was using hot blast cupola (HBC) furnace which was injected with charcoal powder to improve temperature process and reduction zone in the furnace. The process was started by washing process and magnetic separation of raw
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· The construction waste crushers are suitable for complex composition construction waste. Strip steel bars from concrete blocks, and remove the metal with iron removers. The crushing, conveying, and screening equipment are equipped with dust and noise reduction measures and spray equipment, with no dust leakage.
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· Ash-slag waste is a complex polymineral system, the quality and properties of which are influenced by many factors: the composition of the mineral part of the fuel, the type of boiler units and the mode of burning coal, the method of
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· The paper attends to the utilization and performance improvement of waste red brick powder activated by calcium carbide slag (CCR). Therefore, the improvement of mechanical properties and microstructure of calcium carbide slag-waste red brick powder based alkali-activated materials (CWAAMs) by silica fume, composite
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· Co-melting reaction mechanism To overcome the disadvantages of the traditional water glass preparation mentioned above, a low-temperature co-melting approach was proposed for preparation of sodium silicate. It is clearly seen from the SiO 2-Na 2 O phase diagram (Figure 1) (Paul, Citation 1990) that the eutectic temperatures between
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· Table. 1 lists the physical properties of steelmaking slag, which was collected from a South Korean steel company. The collected steelmaking slag was deemed suitable material for the subbase of a road, and it possessed a specific gravity of 3.6 g/cm 3, water absorption of 1.23%, soundness of 2.5%, and abrasion rate of 19.9%.
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· Schematic diagram of a new technological system for hydro-vacuum granulation (HVG) of slag melts. 1—HVG unit; 2—diffusor with a replaceable nozzle (d—functional diameter of the nozzle); 3—dispersion chamber (r, h—radius and height of the work space); 4—impact area of the associated shock wave with the effect of initiation
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· It is found that the glass-ceramics sintered at 850 °C and 1 000 °C from grate fly ash and fluidized bed fly ash respectively have the optimal physical, mechanical and chemical characteristics
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· Piles of steel slag, a solid waste generated from the iron and steel industry, could be seen due to no utility found for the past century. Steel slag has now gained much attention because of its new applications. The properties of slag greatly influence its use and thus had got varied applications. The chemical composition of steel slag varies as the
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:Civil EngineeringPublish Year:2019In recent years, construction waste has been crushed and screened into slag using mobile crushing and screening equipment in China. However, construction waste slag is still a
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· Introduction. Gas installations of combined cycle (GICC) process is a fully different electrical power production process with energy obtained from burning a mixture of coal and coke coming from petroleum refining. In this new process, inorganic wastes are produced as fly ashes and slag residual material. GICC technology is based on a coal
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· Reduce, reuse, and recycle are important techniques for waste management. These become significant for improving environmental and economic condition of industries. Integrated steel industries are
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Steel slag can be directly used as sinter flux and iron smelting flux for the production of steel [6]. The pretreated. steel slag can be utilized directly for road construction (around 49.7% in the US), as aggregate in the manufacture of concrete
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· Thermogravimetric analysis (TGA) is the most widespread thermal analytical technique applied to waste materials. By way of critical review, we establish a theoretical framework for the use of TGA under non-isothermal conditions for compositional analysis of waste-derived fuels from municipal solid waste (MSW) (solid recovered fuel
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· ABSTRACT. The objective of this paper is to investigate the utilization of. Submerged Arc Welding (SAW) slag as a fresh ux for sustainability. Certain alloying elements were added to the crushed
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· Gasification slag (GS) is rich in SiO2, Al2O3, and Fe2O3, and has excellent particle size gradation, which has the potential to be employed as an aggregate in the field of controlled low-strength material (CLSM). Nevertheless, the large-scale application of GS as the fine aggregate for the preparation of CLSM has been scarcely
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· The slag from the best experimental results had a chemical composition with a relatively low viscosity at the reduction temperature. Flux additions of 40% Na 2 CO 3 and 10% CaCO 3 (constant in all tests) were sufficient to affect a slag viscosity of less than 7 Pa.s at a reduction temperature of 1200 °C, as shown in Fig. 8 d.
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4.1 Introduction. Steel slag is an industrial waste that is generated during the production of steel. In the production of steel, oxides of metal impurities in the iron combine with the flux (which is usually a mixture of lime and dolomite) to form a molten layer of steel slag that floats on top of the steel.
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Iron slag (slag of blast furnace BF) and steel slag (slag of basic oxygen furnace BOF, and electric arc furnace, EAF) are two types of slag generated during iron and steel
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· To assess the effect of the fine-grained fraction generated by sample crushing, a set of leaching experiments was performed on copper smelting slag from the Zambian Copperbelt: (i) EN 12457-2 batch tests (standardised grain size <4 mm; modified procedure with grain size of 4–0.5 mm simulating exposure of larger fragments on the
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· To solve the problem of difficult utilization of steel slag, the liquid steel slag was modified and the air-quenching granulation process was carried out to make steel slag into a value-added end product: air-quenching granulated steel slag. The granulated slag was tested to analyze the variation rule of slag properties under different modification
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· With the rapid development of dedicated fright corridors, semi-high speed railroads and upgradation of the existing railroad to higher speed limit, Indian railways need a huge amount of natural ballast material. However, towards sustainable development, steel slag has enormous potential to be used as railway ballast. An in-depth understanding of
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:Publish Year:2021Average Chemical Composition of SlagAlicja Kicińska · Copper slag is a by-product obtained during smelting and refining of copper. The waste copper slag can be used as abrasive tools, road construction, and ballast. Despite increasing rate of reusing copper
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:Solid WasteCopper Slag Environmental ImpactCopper Slag Properties · The experiment was continued to reduce pellet composite in the HBC furnace. The pig iron produced from this process contained of 93.62%Fe, 3.5%C, 1.55%Si, 0.87%Mn, 0.05%P, and 0.087%S.With this
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· Reduce, reuse, and recycle are important techniques for waste management. These become significant for improving environmental and economic condition of industries. Integrated steel industries are generating huge amounts of steel slag as waste through the blast furnace and Linz–Donawitz (LD) process. Presently, these
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· Slags are byproducts of the metallurgical industry. It is of importance to recycle materials and recover heat from metallurgical slags to reduce the energy consumption and environmental impact of steel industry. China is the largest iron- and steelmaking slag producer in the world, and intensive efforts have been made during last
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