Results 81 to 90 of about 7,439,165 (303)

Engineering Kinetics of Metallurgical Roasting. VI. Temperature of Fluidized Bed for Roasting of Pyrrhotite

open access: yesThe Journal of the Society of Chemical Industry, Japan, 1964
本報では,見掛けの反応速度が送風空気の質量速度に律速されるような条件で,磁硫鉄鉱を流動酸化バイ焼し,その際の層温度,管壁温度変化を実測し,その結果について考察を加えた。すなわち, 磁硫鉄鉱粒子の温度変化式を若干の近似をおこなって解析的に導き, この理論式で前報でえた伝熱係数値を用いて計算した結果は,実験結果をよく説明することができた。
openaire   +2 more sources

Purification of Li2CO3 Obtained through Pyrometallurgical Treatment of NMC Black Mass from Electric Vehicle Batteries

open access: yesChemSusChem, Volume 18, Issue 6, March 15, 2025.
Lithium carbonate (Li2CO3) obtained from the black mass of recycled lithium batteries is dissolved in water under controlled conditions to remove lithium fluoride (LiF), which is present at a concentration of 3.08 % by weight. The dissolution is carried out at temperatures below 10 °C, and it has been demonstrated that lower temperatures result in ...
Laura Rosso   +3 more
wiley   +1 more source

Study on roasting process of zircon-silica sol ceramic mould [PDF]

open access: yesChina Foundry, 2011
Dry stock of silica sol ceramic mould was prepared by using of colloidal moulding technique with an optimized vacuum drying process. Effect of roasting process on the shrinkage rate and compressive strength of zircon-silica sol ceramic mould, and the ...
Zhang Yeming, Zeng Ming, Hu Li
doaj  

Low-Temperature Chlorination-Roasting–Acid-Leaching Uranium Process of Uranium Tailings: Comparison Between Microwave Roasting and Conventional Roasting

open access: yesProcesses
A new and efficient low-temperature chlorination-roasting–acid-leaching uranium process was proposed to solve the problems of low leaching efficiency, since the leaching residue does not meet the discharge standard in the traditional nitric acid leaching-uranium tailings process, compared with conventional chlorination roasting. XRD, SEM, particle size
Jinming Hu   +5 more
openaire   +1 more source

Universal and Normalized Regeneration of Heterogeneous Spent LiFePO4 via Mechanochemical Delithiation and Flash Relithiation

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
We propose a universal “x → 0 → 1” regeneration route: mechanochemical delithiation converts spent LixFePO4 of any degradation level to FePO4, erasing batch variance; 35‐s flash relithiation yields uniform LiFePO4 with near‐identical capacity, suppressing grain growth and cutting energy andtime by >90% versus furnace sintering, overcoming unpredictable
Yaduo Song   +13 more
wiley   +1 more source

Optimization of microwave-assisted roasting: Box-behnken design for oxidation of sulfide minerals and control of atmospheric sulfur in refractory gold ore pretreatment

open access: yesCase Studies in Chemical and Environmental Engineering
Response Surface Methodology and Box-Behnken Design have been applied to optimize microwave-assisted roasting of refractory gold ore. The roasting is used as a pretreatment for refractory gold ore to increase gold recovery during leaching.
Abdul Hapid   +8 more
doaj   +1 more source

Phases Transition and Consolidation Mechanism of High Chromium Vanadium-Titanium Magnetite Pellet by Oxidation Process

open access: yesHigh Temperature Materials and Processes, 2016
Based on the fundamental characteristics of high chromium vanadium-titanium magnetite (HCVTM), the effects of roasting temperature and roasting time on the phase transition and oxidation consolidation during the oxidation were investigated systematically.
Tang Jue   +4 more
doaj   +1 more source

Roasting optimization of robusta coffee beans and their effect on the antioxidant related compound [PDF]

open access: yesBIO Web of Conferences
Coffee is known for its flavor and antioxidant effects. Roasting may change the characteristics of caffeic, chlorogenic, ferulic, and sinapic acids. While temperature and time are key factors affecting coffee’s aroma, flavor, and taste, airflow during ...
Prajna Deyla   +3 more
doaj   +1 more source

Ultrasonic Monitoring of Beef Temperature During Roasting

open access: yesLWT - Food Science and Technology, 2000
Abstract Ultrasound has appealing properties as a means to monitor quality of industrially manufactured food items. Changes in ultrasonic signal properties are associated with changes in raw material or process parameters. This paper introduces a concept based on an ultrasound transmission measurement which has shown ability to monitor the ...
Edward Hæggström, Mauri Luukkala
openaire   +1 more source

Sustainable Revival of Spent Lithium Iron Phosphate Cathodes in Li‐Ion Batteries: Recycling and Surface Engineering Approaches

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Schematic illustration of the lifecycle of LiFePO4 cathodes. Lithiation and delithiation reactions happen through its discharging and charging processes. Recycling pathways including hydrometallurgy, pyrometallurgy, and direct regeneration enable sustainable reuse of spent LFP materials. Surface modification approaches (carbon, polymer, and metal/metal
Yan He, Ruigang Wang
wiley   +1 more source

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