Journal of Materials Research and Technology-JMR&T
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2021
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IF 5.039
Haipei Zhang,Bo Li,Yonggang Wei,Hua Wang
Settling time, system temperature and reductant amount play an important role in the recovery of matte from copper slag. This study investigated the settling behavior of matte particles in copper slag and the effects of the settling time, system temperature, and reductant amount on the macrostructure of slag, microstructure of matte particles, and copper loss. The results showed that the settling behavior of matte particles in slag at the experimental temperature was a process of aggregation and growth. With an increase in settling time and temperature, as well as the addition of an appropriate amount of anthracite, the foaming slag layer of the slowly cooled slag gradually disappeared, while the recovery of matte increased. However, when the amount of anthracite was too high, Fe–Cu alloy formed at the experimental temperature, which resulted in worsened fluidity of the matte in the molten slag and copper loss increased. At the experimental temperature, the settling environment of matte particles in the liquid phase layer was superior to that of the foaming slag layer. The novel idea of using rubber seed oil instead of a traditional fossil reductant to clean the copper slag was put forward. At the temperature of 1250 °C, 4 mL of rubber seed oil was injected, resulting in a settling time of ≥90 min, after which the copper content in the upper part of the slowly cooled slag was less than 0.57 wt.%, reaching the acceptable level of discardable slag in industry.
研究领域:
冶金学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Yao Li,Min Zhang,Rongjie Hao,Huihui Wang,Xizhen He,Tingting Du,Xin Yang,Yingying Wang
The rapidly increasing use of graphene oxide (GO) necessitates the immediate investigation of the environmental fate and effects of this unique material. To date, little is known about the transformation of GO in environmental media, especially in water and wastewater treatment systems. This study explored the changes in the physicochemical properties of GO that result from (photo)bromination by simulating the reactions experienced by GO during water and wastewater treatment. The surface oxygen functionalities of GO considerably changed upon treatment. Specifically, the C OH and COOH groups of GO were lost under bromination , and the reduction of GO was enhanced under photobromination. GO sheets wrinkled and fragmented under bromination, and GO decomposition was enhanced by photobromination. The decreases in O/C ratio and GO decomposition in the presence of bromine were mainly attributed to the relatively high oxidation potential of bromine, which can oxidize carbon nanosheets. The oxidation of carbon nanosheets, in turn, resulted in the decomposition and formation of brominated disinfection by-products. Irradiation, hypobromous acid/hypobromite (HOBr/OBr − ), and reactive radicals, such as OH, Br , BrO and Br 2 − , may all affect the physicochemical transformation of GO in the presence of bromine and simulated solar light. Bromination and photobromination drastically changed the aggregation and sedimentation behavior of GO. The findings of this study advance knowledge on the transformations of GO in water treatment systems and provide insight on the environmental fate of the transformation products of GO.
研究领域:
环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2024
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IF 8.5
Dacheng Feng,Sijia Yin,Xinyao Wen,Pu Jing
Poor dispersion stability of nutritious rice bran milk limits its production. In this study, the dispersion stability of rice bran milk after heating at 95 °C for 0–5 min was investigated. Visual observation revealed improved dispersion stability and changes in settling behavior with heat durations. After heating for 5 min, the serum turbidity increased from 1.86 to 2.95. The centrifugal sedimentation rate unexpectedly rose from 9.25% to 29.18%, indicating an increase in volumetric particle concentration. Fourier transform infrared spectroscopy revealed that heating induced starch gelatinization and protein denaturation in rice bran milk, leading to increased volumetric particle concentration. Rice bran protein aggregates after heating were developed and embedded in the gel-like network composed of swollen starch granules. These results suggested that rice bran milk, due to thermal-induced alteration in biomacromolecules, may behave progressively from free settling to hindered settling to compression settling, resulting in improved dispersion stability.
研究领域:
食品科学
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
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2025
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IF 3
Yebing Tian,Cheng Qian,Xiangyu Yuan,Kunal Arora,Guangyi Wu,Zepeng Chen,Qi Wang
Magnetorheological shear thickening polishing (MRSTP) has garnered significant attention in the field of ultra-precision polishing. However, current studies have primarily concentrated on the rheological properties of MRSTP fluids (MRSTPFs) and their application in polishing planar workpieces. The study investigated the sedimentation behavior, magnetization property of MRSTPFs, and their polishing performance on ring-shaped silicon carbide ceramic. The MRSTPFs were prepared by blending diamond particles, carbonyl iron particles, and a carrier fluid consisting of polyethylene glycol 200 and silicon dioxide. MRSTPFs with higher concentration of carrier fluid exhibited superior resistance to sedimentation. Specifically, the MRSTPFs with carrier fluid concentrations of 15 % and 20 % showed sedimentation ratios of 4 % and 2 %, respectively, after 49 days. The magnetic hysteresis loop of MRSTPFs revealed excellent magnetic stability and minimal hysteresis loss. The coercive force, remanence, and saturation magnetization were 6 Oe, 0.16 emu/g, and 43 emu/g, respectively. Furthermore, polishing experiments were conducted on ring-shaped silicon carbide ceramic using various polishing parameters, including feed rate, tool rotation speed, diamond particle size, and working gap. Under the optimal polishing parameters, the surface roughness was significantly reduced from 767 nm to 37 nm, indicating a remarkable improvement in surface quality. This study provides valuable insights into the fundamental characteristics of the MRSTPFs and highlights their significant potential for applications in ultra-precision polishing.
研究领域:
材料科学
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机械工程
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表面工程
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流变学
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磁性材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）