-
- دوشنبه تا شنبه: 10:00 - 16:00 / یکشنبه تعطیل است
Through steel slag usage in such applications, a solution has been provided for preventing the rapid consumption of our limited natural resources and solving the environmental problems caused by waste to some extent. Steel slag production is estimated as 10–15% of crude steel production [17].
به خواندن ادامه دهید
Coal ash, also referred to as coal combustion residuals or CCRs, is produced primarily from the burning of coal in coal-fired power plants. Coal ash includes a number of by-products produced from burning coal, including: Fly ash, a very fine, powdery material composed mostly of silica made from the burning of finely ground coal in a boiler.
به خواندن ادامه دهید
Around the world about 400m tonnes of slag waste is generated every year. Some of it is used in construction, as road aggregate for example, but much of it remains heaped and unused.
به خواندن ادامه دهید
To overcome this problem, basic oxides and neutral oxides are added to the slag to lower the viscosity and promote the efficient separation of the matte and the slag (Davenport et al., 2002, Banda et al., 2002, Piatak and Seal, 2010, Potysz et al., 2015). Low viscosity promotes the coalescence of fine particles to form bigger particles which ...
به خواندن ادامه دهید
The metal ore mining industry, including copper, generates over 10 billion tonnes of slags, dusts and aerosols as by-products, which are contaminated with metals and metalloids, including toxic ones such as As, Cd, Hg and Pb. Landfilling is the most common method of waste management.
به خواندن ادامه دهید
JSW Steel commenced, in April 2020, an extensive research and development project which aimed to identify a viable and sustainable solution to the problem of steel slag. Following extensive theoretical studies, laboratory testing and field studies, JSW Steel has developed an innovative process for transforming waste steel slag into IS-383:2016 ...
به خواندن ادامه دهید
Slag is a major problem in the metallurgical industries as it is dumped into heaps which have accumulated into millions of tons over the years. ... Secondary lead slag, a waste product from ...
به خواندن ادامه دهید
In this paper, we report the experimental results obtained in slag waste processing by direct current arc discharge initiated in ambient air. The method does not employ vacuum and gas equipment, therefore increasing the energy efficiency of processing. Plasma processing of coal slag was performed at different arc exposure …
به خواندن ادامه دهید
Parron-Rubio et al. reported replacing cement by 25% slag, which is considered to be a good strategy for reducing cement consumption and solving the waste problem. The use of steel slag as a partial replacement for cement could make a significant contribution to the steel industry and help to reduce CO 2 emissions [ 17 ].
به خواندن ادامه دهید
By Communications and Publishing June 29, 2017. Slag. Depending on where you're from, it may be an insult, a term meaning trash, or, in our case, the waste left over from metal smelting or refining. Outside of the …
به خواندن ادامه دهید
In terms of solid waste resource utilization, S95 grade ultrafine mineral admixture prepared by water-quench manganese slag and fly ash can replace 10% silica fume for the preparation of UHPC.
به خواندن ادامه دهید
1. Introduction. Waste production by industrial sectors can harmfully impact the environment, and its amount has been increasing globally (Aljerf, 2018b).Environmental Protection Agency in the United States (US EPA) showed that in 2020 the US industrial economic sector produced about 24% of total greenhouse gas emissions (EPA, 2023a).It …
به خواندن ادامه دهید
The utilization of solid waste is the challenge for the civil and environmental engineers to utilize the waste from different industry to excel the sustainable development, and in the same time, it is matching with the cost concern of the present materials. Copper slag is a by-product obtained during smelting and refining of copper. The waste copper …
به خواندن ادامه دهید
Nickel slag can combine with steel slag or as granulated ground blast furnace slag possessing high hydration activity, to realize its role as a binder during S/S (You et al., 2019). As a result of the lack of Al and Ca in nickel slag compared with GGBS, this would lead to a reduction in the formation of C–S–H or C-A-S-H gels, which can ...
به خواندن ادامه دهید
One layer is a waste containing iron and silica compounds and is discarded as slag slagByproduct left after a desired metal is thermally separated from its raw ore.. Approximately 75 percent of the copper concentrate ends up as slag. The other layer, called "matte copper," consists of copper, iron sulfide and other metals.
به خواندن ادامه دهید
Parron-Rubio et al. reported replacing cement by 25% slag, which is considered to be a good strategy for reducing cement consumption and solving the waste problem. The use of steel slag as a partial replacement for cement could make a significant contribution to the steel industry and help to reduce CO 2 emissions [ 17 ].
به خواندن ادامه دهید
Of the approximately 5.6 Mta of steelworks slags, 36 % were recovered in 2017 and 23 % were recycled within the steel industry. The recovered quantities went almost entirely to road construction. Unfortunately, the Steel Institute has no information on the number of granulation plants for blast furnace slag in Brazil.
به خواندن ادامه دهید
The Fe3O4 and Fe2SiO4 in copper slag were successfully reduced to metallic iron by coal-based direct reduction. Under the best reduction conditions of 1300 °C reduction temperature, 30 min reduction time, 35 wt.% coal dosage, and 20 wt.% CaO dosage (0.75 binary basicity), the Fe grade of obtained iron concentration achieved …
به خواندن ادامه دهید
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 …
به خواندن ادامه دهید
With the rapid development of China's steel industry, rising rates of steel production have led to the increase of steel slag emissions. Steel slag is a kind of industrial solid waste produced in the process of iron and steel smelting, and its emission is about 15 wt%–20 wt% of crude steel output [].According to the data released by the World Iron and …
به خواندن ادامه دهید
Coal ash refers to the hazardous byproducts of coal combustion at coal-based power plants — namely, fly ash, bottom ash, and boiler slag — which contain toxic materials such as arsenic and ...
به خواندن ادامه دهید
Through steel slag usage in such applications, a solution has been provided for preventing the rapid consumption of our limited natural resources and solving the environmental problems caused by waste to some extent. Steel slag production is estimated as 10–15% of crude steel production [17].
به خواندن ادامه دهید
Arul Arulrajah, Yan-Jun Du, Suksun Horpibulsuk & Avirut Chinkulkijniwat. Clean Technologies and Environmental Policy 19, 949–958 ( 2017) Cite this article. 1988 …
به خواندن ادامه دهید
Pyro-metallurgical copper slag (CS) waste was used as the source material for ultrasound (US) silica extraction under acidification processes with 26 kHz with HCl, HNO 3, and H 2 SO 4 at different concentrations at 100, 300, and 600 W. During acidifying extraction processes, US irradiation inhibited silica gel formation under acidic conditions, …
به خواندن ادامه دهید
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 …
به خواندن ادامه دهید
Coal ash is not just a waste, but a resource in demand in the construction industry to be used to make concrete. The fine ash, known as fly ash, can act as a partial substitute to cement, with ...
به خواندن ادامه دهید
Slag is a waste product from the pyrometallurgical processing of various ores. Based on over 150 published studies, this paper provides an overview of …
به خواندن ادامه دهید
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 ...
به خواندن ادامه دهید
Published: 26 September 2022. Waste slag benefits for correction of soil acidity. Viorica Ghisman, Alina Crina Muresan, Daniela Laura Buruiana & Elena Roxana Axente. …
به خواندن ادامه دهید
Steel slag is a high-alkalinity waste solid, which is testified in the pre-experiment pH of > 5.0. In this study, about 50 g of the samples were weighed into polypropylene bottles, and 1 L of the TCLP reagent (0.1 M HAc, pH = 2.88 ± 0.05) was added. Next, the bottles were tumbled in a rotary extractor at 30 ± 2 rpm, and kept for 18 …
به خواندن ادامه دهید