Hazards of improper disposal of tunnel slag. During the excavation process of highways and high-speed railway tunnels, a large amount of tunnel slags are generated. Due to factors such as construction technology and organization, the tunnel slags cannot be reasonably utilized, and it is often necessary to build specialized spoil areas for ...
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 …
In recent years, due to escalating environmental challenges, the recycling of metallurgical slag has attracted significant attention from researchers [1]. Recent studies …
Steel plants choose these pretreatment processes to achieve preliminary stabilization of steel slag within the field. Despite this, 70% of steel slag in China still does not receive proper disposal and is forced to be stockpiled or landfilled (Guo et al., 2018; Liu, J. et al., 2022).
INTRODUCTION Since 1950s, the average mining depth of coal mines in China hasincreasedbyyears(Guo et al., 2020; Wang et al., 2021). Up to now, coal mines are still mined downwards at the rate of
Boiler slag is the agglomerated residues formed in coal-burning facilities; coal combustion furnaces in thermal power stations, for instance. Boiler slag is formed at the base of the furnaces, mainly slag-tap and cyclone types, at temperatures of 1500–1700 °C (2732–3092 °F). The molten slag is collected and quenched with water-forming ...
In this paper, we reviewed steel slag treatment, recycling, and management in China. Although China's annual slag production reached more than 100 million tons, its …
The problem of steel slag could be solved by expanding the utilization ways of steel slag. At present, steel slag has been used in the production of cement, the construction of urban roads and the production of fertilizer (Fronek et al., 2012; Jiang et al., 2018b; Shi and Qian, 2000; Wang and Cai, 2006).In developed countries, the utilization …
A large amount of carbide slag (CS) will be produced during acetylene production, the main component of which is Ca(OH) 2 (Cheng et al., 2017). For example, in China, the total output of CaC 2 is more than 2.79 billion tons in 2022, which means more than 3.2 billion tons of waste CS (Huo et al., 2021). It is an effective way to use CS to ...
Steel slag recycling is a serious problem in China. The volume of steel slag is growing rapidly because the output of steel is steadily increasing; however, slag's utilization remains relatively low. The utilization rate in China is only 29.5%, whereas the …
Slag pot is a load-bearing device whose sole purpose is to collect molten or solid slag generated during metallurgical or chemical processes, to retain it during transport and to deposit it at a place of disposal. Slag pot …
In addition, nanoparticles in coal gasification slag may be inhaled by human body, resulting in weakened immune system (Guo et al., 2022a). Therefore, the rapid growth in annual production of coal gasification slag poses a huge challenge for its environmentally sound disposal, and controlling its pollution has become an urgent issue.
1. Introduction. Over the past two decades, China has become the world's largest steel producer, with an annual output of about 1 billion tons, accounting for more than half of the global production [1].A substantial amount of metallurgical solid waste is produced in the process of steel production, with blast furnace slag (BFS) being the predominant …
The mass production of steel is inevitably accompanied by large quantities of slags. The treatment of ironmaking and steelmaking slags is a great challenge in the …
The terms blast furnace slag (BFS) and granulated blast furnace slag, as well as LD slag and electric furnace slag are used for finer distinctions. With high-quality iron ore grades with an iron content of 64 to 67 %, a blast furnace typically produces about 0.25 to 0.30 t of slag per t of pig iron.
Cast Iron Knife Gate Valve. The KOSEN Cast Iron Wafer Knife Gate Valves are widely used in coal mine, power plant ash disposal, slag disposal, urban sewage treatment, food, health, medicine and other …
Coal gasification is a promising clean coal technology that converts fuel into synthetic gas at high temperatures [1], [2].Coal gasification fine slag (CGFS), as a waste by-product of the coal gasification process, is composed of residual carbon and inorganic minerals [3].Over 33 million tonnes of CGFS are produced annually in China, which has led to the issue of …
This study confirms the effectiveness of carbide slag in enhancing the bioavailability of phosphorus in sewage sludge-derived biochar, thereby achieving dual objectives of municipal sewage sludge and carbide slag co-disposal. Specifically, it achieves an 89.85% proportion of AP in biochar at 500°C pyrolysis.
As the main solid waste of the electrolytic aluminum industry, overhaul slag contains a large amount of hazardous substances, and how to treat it harmlessly and efficiently recover the valuable substances in it has become an urgent problem in the aluminum industry in recent years. This article analyzes and summarizes the …
Magnesium slag (MS) is one of the main industrial solid wastes produced by the magnesium industry. ... Solving the problem of its disposal has attracted much attention with increasing amounts of solid wastes generated in the production of metallic magnesium. ... (0–4, 0–0.74, 20–127, 100–170, 2 277–14 800 and 133 –1 000 mg kg –1 ...
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South Manganese Investment Limited announced a plan to build a new production line capable of processing 1. 5 million tonnes per annum of electrolytic manganese slag through calcination and desulfurization processes, in a bid to solve the disposal problem relating to the residue produced in the process of manganese …
GB/T 40298-2021 English Version - GB/T 40298-2021 Technical specification for disposal and recycling of slag from hot dip galvanizing of steel (English Version): GB/T 40298-2021, GB 40298-2021, GBT 40298-2021, GB/T40298-2021, GB/T 40298, GB/T40298, GB40298-2021, GB 40298, GB40298, GBT40298-2021, GBT 40298, GBT40298
As landfill space for the disposal of products of municipal solid waste incineration (MSWI) such as fly ash and slag becomes increasingly scarce, a reduction ... MSWI fly ash, MSWI slag, water, and water reducer. The fly ash and slag were obtained from the MSWI plant in Jilin, China. The fineness modulus of the fly ash was 3.2, with an ...
Compared with the traditional process, this work has short flow, high controllability, remarkable technical, economic, and environmental benefits. This comprehensive recycling technology is suitable for overhaul slag, and has great practical application potential for the disposal of other hazardous wastes in electrolytic aluminum …
In 2020, China's crude steel output reached 1.065 billion tons, accounting for 56.76 % of the global crude steel output [3]. ... There is no effective large-scale disposal method for steel slag except stacking, the massive accumulation of steel slag has a serious impact on the environment.
However, China's comprehensive utilization rate of PG was only 38.67% in 2019, and stacking is still the primary disposal method (Ou et al., 2021). Therefore, there is an urgent need for the P fertilizer industry to implement the resource use of PG for sustainable development ( Yang, 2021 ).
The representative sample of raw gasification fine slag was obtained from the China Shenning pulverized coal gasifier in Shenhua Ningxia Coal Industry Group Co., Ltd. situated within the Ningxia Hui Autonomous Region, China. Further details regarding the sampling procedure can be found in our previous study [11].
In this paper, we reviewed steel slag treatment, recycling, and management in China. Although China's annual slag production reached more than 100 million tons, …
Recently, the incineration rate of MSW disposal in China has exceeded 70 % and continues to rise annually [1].In particular, almost half of the MSW incineration plants are located in Guangdong, Jiangsu, and Zhejiang provinces, noted for their developed economies and higher population density [2, 3].However, these economically developed …
China: Alkali slag, Salt mud: Jiangsu Huaian, Hubei Yingcheng: 2010s: ... monitoring has been used to monitor the stability of the salt cavern system for a long time at the drilling waste disposal site in China. Using groundwater quality monitoring and gas composition monitoring technology to monitor the long-term sealing of the salt cavern ...
COPPER SLAG Copper Slag is an aggressive abrasive frequently used in new steel and steel maintenance applications. ... saving you money on disposal costs and clean-up labor. ... China; Phone: +86-21-56309596; …
