Life Cycle Assessment of Internal Recycling Options of Steel Slag …
— Steel slag can be divided into five types, e. g. desiliconiza- tion slag, desulfurization slag, dephosphorization slag, converter slag and refining slag. Because wind quenching technology is not suitable to treat desili- conization slag, water quenching technology is adopted Issue 7 Life Cycle Assessment of Internal Recycling Options of …
Utilisation perspective on water quenched and air-cooled …
— The process of granulation is a controlled rapid quenching of the BF slag in cold water with minimum scope for crystal growth. A large volume of water is used (at a ratio of 10:1 of water and molten slag) on to the molten slag to facilitate accelerated cooling under this environment and gets converted into the amorphous particles of sand size ...
Steel slag water quenching treatment system
Tradition steel slag water quenching method is because residual steel did not carry out effective separation before shrend with liquid steel slag, residual steel withWater contact is easily blasted, and has formed larger potential safety hazard to user, has affected the normal production of steel-making,User's economic benefit and social benefit are reduced.
Experimental Study on Electric Conductive Pavement Brick …
— The conductive pavement brick can be used for deicing, especially for urban regions with heavy snowfall. This work aims at developing a new pavement brick, which was prepared by steel slag quenching with wind mixed with carbon fiber, and the electrothermal law of the samples was studied by using low-voltage direct current (DC) …
Characteristics of steel slag under different cooling conditions
— how water quenching of steel slag results in products with. a high content of glassy material. Silicate melts have high. viscosity due to long molecule chains, and rearrangement.
Effect of Cooling Method on the Mineralogy and Stability of Steel Slag
— The content of f-CaO in samples was reduced from 14.75 mass% of furnace cooling slag to 2.64 mass% of water quenching slag. According to the empirical formula Eq. (6), the autoclaved chalked ratios of steel slag under furnace cooling, air cooling, mist cooling, and water quenching were 24.98%, 19.97%, 11.23%, and 5.84%, respectively. …
Utilization of water-quenching blast furnace slag as …
— Water-quenching blast furnace slag as a by-product of the iron production has caused serious environmental concerns. This paper tried to investigate the feasibility of the blast furnace slag ...
A technical guide to quenching | Thermal …
— For example, the purpose of quenching A356 Al castings is to keep the Mg2Si from forming precipitates. If done correctly, this yields maximum strength and good elongation in castings. Quenching of steel …
Research Progress on Controlled Low-Strength Materials: …
— Slag water-quenching processes are rapid to complete, and some of the unreleased heat energy of these processes is converted into chemical energy and stored as chemical bonds in the slag. ... Mo et al. prepared a steel slag slurry by mixing steel slag with water (with a water–slag ratio of 0.40). After curing the slurry for 14 days at a ...
The process design of water quenching based on …
— However, the cracking of alloy steel parts is easily caused by water quenching and has not been solved for a long time. Therefore, oil quenching and polymer aqueous solution are still widely used in heat …
Using water as a quenchant | Thermal Processing Magazine
— Water quenching is an umbrella term used to describe a heat treatment process in which a heated metal component is rapidly cooled by immersing it in a water-based quenchant. There are four …
Quenched Slag
A water-quenching process is necessary for the formation of WQS particles, to enable cooling down, liquified blast furnace slag at more than 1400°C was dumped into a river. …
Thermoelectric power generation driven by blast furnace slag flushing water
— For the blast furnace, converter and electric furnace slag sensible heat, only water quenching method recovering hot water has been applied while the others are still in the experimental research stage [7]. Using the flashing water sensible heat to heat the residents in winter is the main utilization way in China.
An efficient molten steel slag gas quenching process: …
— 1. Introduction. Given the objective of energy conservation and emission reduction in recent years, the iron and steel-making industry has emerged as a crucial sector for low-carbon transformation due to its high carbon emission, with CO 2 concentration reaching up to 20 % (Luo and He, 2021, Zhan et al., 2024, Zhao, …
Steel Slag
Steel slag can also be produced by smelting iron ore in a basic oxygen furnace. According to methods for cooling molten steel slag, steel slag is classified into five types: natural air-cooling steel slag, water-spray steel slag, water-quenching steel slag, air-quenching …
Research Progress on Controlled Low-Strength Materials: …
— Slag water-quenching processes are rapid to complete, and some of the unreleased heat energy of these processes is converted into chemical energy and …
Blast Furnace Slag
Pelletized slag is solidified by water and air quenching in conjunction with a spinning drum. Molten slag containing gas bubbles is projected through a water spray so as to form pellets. These are rounded in shape and have a smooth coated surface. However, crushing (which destroys the coating) has to be used to obtain fine particles.
A study on water-quenching waste heat recovery from …
— Highlights. •. Three water-quenching systems are proposed to recover waste heat from molten slag. •. The subcooled-water-quenching system can increase the …
Effect of Quenching Method on the Structure of Glass Slag
— The fitting results of Raman spectra for glass slags obtained by quenching in water and on stainless steel plate are displayed in Fig. 2b and c, respectively. It can be seen from Fig. 2b and c that there were five symmetric bands for the two glasses, ~ 745, ~ 795, ~ 855, ~ 910, and ~ 1035 cm −1.Among them, the band at ~ 745 cm −1 and at ~ …
Phase development in steelmaking slags during a gas quenching …
— Studies have shown that rapid cooling of steelmaking slag can effectively reduce its f-CaO content.Li et al. [19] reported that the f-CaO content in the steelmaking slag treated by furnace cooling, air cooling, mist cooling and water quenching was 14.75%, 11.58%, 6.05%, and 2.64%, respectively.The details of CaO content will be discussed in …
Energy–environment–economy evaluations of
— During water quenching process, high-pressure water is employed to shatter the molten slag. However, the water quenching methods not only fail to recover the high-temperature waste heat but also consume a huge amount of fresh water by the evaporation of 1000–1500 l of water per ton of slag [13].
Stabilization of Stainless Steel Slag via Air Granulation
— In stainless steel production, slag from argon oxygen decarburization (AOD) converters is dumped on to the ground and then slowly cooled. ... (reference sample obtained from water quenching of slag from the ladle). For several tests, Sample A (granulated slag) was collected as three fractions based on its locational distance from …
Study on Physical Excitation Mechanism of Steel Slag
— The use of the gas-quenching process for preparing porous bead slag abrasive was investigated in this paper. An X-ray diffractometer, field emission scanning electron microscope, mercury intrusion ...
A Review of Granulation Process for Blast Furnace Slag
The steel industry is one of the most energy-intensive industries in China. Based on statistics of World Steel Association, China's crude steel output reaches 823 ... However, there are many defects of water-quenching slag method, which can be roughly concluded as follow: a mass of sensible heat unrecovered, high water consumption, air ...
SE micrographs of slag stabilized by water …
Rapid cooling could reduce the content of RO phase in steel slag, and the content of RO phase for the furnace cooling, air cooling, mist cooling, and water quenching samples were 28.03%, 22.53% ...
Utilisation perspective on water quenched and air-cooled …
— The cooling measures (such as, air-cooled, water and air quenching, and steam quenching) impact the crystallization process of minerals in iron slag. The rapid cooling process (e.g., water ...
Comprehensive Utilization Technology of Steel Slag
— The water quenching method includes furnace-front water quenching and outdoor water quenching. Furnace-front water quenching means pouring high …
Applicability of water-spray electric arc furnace steel slag for
— There are various methods for cooling molten EAF steel slag: air-cooling, air-quenching, water-spray, water-quenching and shallow box chilling [28, 29]. Around 100–160 K g of EAF slag is formed per ton of produced molten steel. For the last five years, the produced molten steel in Egypt exceeds fourteen million tons.
Insights into the Valorization of Electric Arc Furnace Slags as
— The transition to hydrogen-based reduction processes within the iron and steelmaking industry will generate new types of slag compositions that require valorization routes. Using slags as supplementary cementitious materials (SCMs) addresses the carbon dioxide emissions of the cement industry since the SCM requires neither calcination nor …
A review of waste heat recovery technologies towards molten slag …
— Water quenching is a traditional heat recovery technology, which uses cold water to cool down slag so as to achieve the desired glassy by-products. However, this technology consumes a huge amount of water and fails to recover the sensible heat of slag. To save energy and reduce water consumption, some other heat recovery technologies …
A study on water-quenching waste heat recovery from molten slag of slag
— To solve high sensible heat loss problem of molten slag, three water-quenching waste heat recovery systems are proposed. For subcooled- and boiling-water-quenching systems, the condensate water can be heated. ... (SM-8)–(SM-12) (Supplementary Material). After evaluating the steel consumption of the heat exchanger, …
Utilisation perspective on water quenched and air-cooled …
— GBF slag is a non-crystalline granular material that varies from the source to source depending on the quality of the raw material smelted as well as the method of production. The liquid slag is cooled and solidified by rapid water quenching to form a glassy state material with minimum probability of crystallisation.