Materials | Free Full-Text | Comprehensive Analysis of Steel …
Abstract. Blast Oxygen Furnace (BOF) slag represents one of the largest waste fractions from steelmaking. Therefore, slag valorisation technologies are of high …
قرأ أكثر
Abstract. Blast Oxygen Furnace (BOF) slag represents one of the largest waste fractions from steelmaking. Therefore, slag valorisation technologies are of high …
قرأ أكثر
Aiming at the low heat recovery efficiency of granulated BF (blast furnace) slag, the concept of a two-stage system recovery waste heat from granulated BF slag was proposed. The principle of the two-stage system was low temperature biomass pyrolysis at 500 °C–700 °C and high temperature bio-oil reforming at 700 °C–900 °C.
قرأ أكثر
2. Main Components and Particle Size Distribution of Coal-Based Solid Waste in the Ningdong Area. In this paper, fly ash-based gasification slag with high content is taken as the main research object, supplemented by coal gangue, desulfurization gypsum, and furnace bottom slag, and then mixed with ordinary 42.5 Portland cement to …
قرأ أكثر
Coal gasification fine slag, a kind of coal chemical industrial solid waste, was obtained from a coal gasification company in China. The residual carbon (RC) in coal gasification fine slag was obtained by sorting and separating, and the specific separation method was detailed in the previous reports [36].The proximate and ultimate analyses …
قرأ أكثر
In this study, low-calcium fly ash and ground granulated blast-furnace slag were used as precursors (P), the chemical composition and the average particle size of which are presented in Table 1.Based on the authors' previous study [21], a mixture of SH solution with molarity of 10 and SS solution with modulus (molar ratio of [SiO 2]/[Na 2 …
قرأ أكثر
Environmental studies, most commonly on non-ferrous slag, focus on understanding the potential environmental impacts of slag deposited as waste, and …
قرأ أكثر
Introduction. Molten BF (Blast Furnace) slag is the byproduct of iron-making process at the high temperature ranging from 1723 K to 1923 K. Because of its low thermal conductivity, ranging from 1 to 3 W m −1 K −1 for solid to 0.1–0.3 W m −1 K −1 for liquid [1], the waste heat recovery of molten BF slag is difficult.Now, the treatment of molten BF …
قرأ أكثر
Namely, about 4.8 tons of waste are produced per EU inhabitant, while only 39.2% of waste is recycled. This issue is relevant particularly in the construction industry as it produces the largest amount of waste across all industrial fields (EU—37.5%). Apart from the concrete, bricks, and ceramic waste stand for approx. 45% of the total
قرأ أكثر
The reduction of magnetic iron in the copper molten slag using waste cooking oil was a first-order reaction, and the rate-limiting step was the mass transfer of Fe3O4 through the liquid boundary ...
قرأ أكثر
Recovering valuable resources from waste sulfur slag is profoundly significant in terms of making profit and encouraging sustainable development within the tin industry. Sulfur slag is a hazardous waste, and a substantial amount of tin and cuprous sulfide is present in waste sulfur slag.However, tin and cuprous sulfide readily react to …
قرأ أكثر
In this article, a novel cascading power cycle (CPC) driven by waste heat in a wide temperature range is proposed for promoting the energy grade, heat source recovery rate and cycle performance, which is consisted of a pumpless absorption power cycle and a pumpless organic Rankine cycle, taking ammonia-water and R245fa as working fluids, …
قرأ أكثر
high temperature steel slag, which generates a pressure of 0.2–0.4 MPa, causing f-CaO in the slag to dissipate rapidly, thus stabilizing and pulverizing the slag. Figure 2 displays the steel slag waste heat system combined with the solar power system. The system con-sists of a steel slag hot smothering waste heat system,
قرأ أكثر
Steel slag powder and construction waste have received widespread attention for their resource utilization as solid waste. This article uses steel slag powder and recycled concrete aggregates to prepare controlled low-strength materials (CLSM). The study investigates the influence of steel slag powder replacing cement and recycled …
قرأ أكثر
Large amounts of copper slag are produced every year and major fractions of it are currently disposed, not withstanding the multiple ways the material can be used. Application of the slag is often limited by the presence of hazardous elements and their leaching behavior so they can potentially pollute soil, surface water and underground …
قرأ أكثر
Slag is a waste product from the pyrometallurgical processing of various ores [2]. The sensible heat in billions of tons of molten slag (such as blast furnace slag, steel slag, copper slag, zinc slag, lead–zinc slag and nickel slag) is a promising source of waste heat with a temperature of over 1300 C all over the world. At present, the ...
قرأ أكثر
Co-pyrolysis of waste printed circuit boards (WPCB) and copper slag (CS) to generate high-value products is a promising approach in view of synergistic waste disposal and the circular economy. In this study, the catalytic pyrolysis of WPCB with CS to generate H 2-rich gas (H 2, CO, CH 4, etc.) was proposed. The pyrolysis behavior of CS on …
قرأ أكثر
In order to recycle and reuse the waste, assessment of their physicochemical, mineralogical and geotechnical characterization is imperative. This …
قرأ أكثر
Copper-cadmium waste slag is roasted at 1200 °C–1300 °C or even higher in a rotating kiln using coke or coal powder. Zinc, copper, cadmium, and lead in waste slag are converted to gas phase. ... According to the results of the EDS analysis, the major components of slag after conventional leaching are Pb and S, with minor amounts of …
قرأ أكثر
dynamic analysis of plasma processing of waste, the universal program for calculating multicomponent heterogeneous systems TERRA was applied [12]. The calculations were performed in the temperature range of 300–3000 K at a pressure of 1 atm. The initial process mixture had the following composition (mass %): ASW — 100 and air 10.
قرأ أكثر
The objective of the study is to analyze the technical suitability of using secondary materials from three waste flows (construction and demolition waste (CDW), Waelz slag and municipal solid waste incineration (MSWI) bottom ash), under the regulations and standards governing the use of materials for road construction.
قرأ أكثر
Mechanical performance and phase analysis of an eco-friendly alkali-activated binder made with sludge waste and blast-furnace slag. Author links open overlay panel Weiwei Duan a, Yan Zhuge a, Christopher W.K. Chow a, ... The highest flowability was approximately 220 mm for neat slag-based samples when the SS/SH ratio was …
قرأ أكثر
A multi-stage waste heat recovery process combined with endothermic reaction reactions (carbonization and activation) was proposed in this research. As a typical application sample, mass and energy calculation of sewage sludge carbonization and activation process are studied based on copper slag's waste heat cascade recovery …
قرأ أكثر
The current review examines the use of various slags, including cupola slag, electric arc furnace slag (EAFS), steel furnace slag (SFS), and ground granulated blast …
قرأ أكثر
The agricultural land resources are an issue world-wide and through this investigative study we showed that the mixture of blast furnace slag and waste slag …
قرأ أكثر
The analysis of slag, the complex mineral mixture formed during iron and steel processing, can be used to determine how efficiently the steelmaking process is running and to predict the quality of the steel being produced. In-process slag monitoring allows for the real-time optimization of the steelmaking process - helping increase efficiency ...
قرأ أكثر
The research results showed (Fig. 1) that the real waste in the form of slag from Waelz processing contained calcium, silicon, oxygen, iron, aluminum (also …
قرأ أكثر
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 activator and …
قرأ أكثر
Highlights. •. System expansion and allocation choices may lead to opposite interpretations. •. Environmental benefit caused by replacement of steel slag aggregate …
قرأ أكثر