Preparation of Granular Sorbent (GS) from Red Mud by Thermal Activation and its Application for Cu2+ Removal

2013 ◽  
Vol 641-642 ◽  
pp. 294-298
Author(s):  
Qin Yan Yue ◽  
Xiao Juan Wang ◽  
Ya Qin Zhao ◽  
Xiao Wei Zhang ◽  
Bao Yu Gao ◽  
...  
Keyword(s):  
Red Mud ◽  
Thermal Activation ◽  
Sintering Temperature ◽  
Raw Material ◽  
Optimal Conditions ◽  
Optimal Parameters ◽  
Single Experiment ◽  
Sintering Time ◽  
Key Factor ◽  
Sintering Method

In this study, granular sorbent (GS) which was prepared from red mud, clay and coal by sintering method was studied. With the aim of determining the optimal parameters for GS production, the influences of several important factors (including raw material ratio, sintering temperature and sintering time) on the adsorption capacity of GS for Cu2+ removal were evaluated in the single-experiment. The results indicated that the raw material ratio was the key factor that influenced the property of GS. The optimal conditions for GS preparation were as follows: the raw material ratio (red mud: clay: coal) of 85:10:5, sintering temperature of 400 °C and sintering time of 20 min.

Research on Tests of Magnetic Abrasive Finishing by Sintering Method

2011 ◽  
Vol 487 ◽  
pp. 273-277 ◽  
Author(s):  
G.B. Liao ◽  
M.M. Zhang ◽  
Y.J. Li ◽  
Z.Q. Liu ◽  
Yan Chen
Keyword(s):  
Magnetic Particles ◽  
Sintering Temperature ◽  
Abrasive Particle ◽  
Temperature Ratio ◽  
Magnetic Abrasive Finishing ◽  
Sintering Time ◽  
Finishing Process ◽  
Abrasive Finishing ◽  
Sintering Characteristics ◽  
Sintering Method

This paper mainly illustrates the magnetic abrasive finishing by sintering method and research on tests of magnetic abrasive finishing, analyses the effect of the sintering temperature, ratio of magnetic and abrasive particle size, sintering time and sintering characteristics of magnetic particles on magnetic abrasive during the finishing process, so as to achieve a better process and principle for magnetic abrasive finishing.

Processing on Red Mud by Integrated Dealkalized Sintering with Magnetization

2013 ◽  
Vol 423-426 ◽  
pp. 640-643
Author(s):  
Yong Guang Fang ◽  
Yu Qian
Keyword(s):  
Phase Transition ◽  
Red Mud ◽  
Sintering Temperature ◽  
Elemental Iron ◽  
Sintering Time

Integrated sintering between magnetization and dealkalization, processed on red mud firstly. DWS-50 was used to detect the rate of dealkalization, and phase transition of elemental iron in red mud was analyzed by XRD. By effect of sintering temperature and sintering time on red mud, the results showed that integrated sintering on red mud between dealkalization and magnetization was feasible.

scholarly journals Fabrication of Self-Lubricating Porous UHMWPE with Excellent Mechanical Properties and Friction Performance via Rotary Sintering

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1335 ◽  
Author(s):  
Xianwu Cao ◽  
Yuping Li ◽  
Guangjian He
Keyword(s):  
Mechanical Properties ◽  
Friction Coefficient ◽  
Sintering Temperature ◽  
High Porosity ◽  
Low Friction ◽  
Sintering Time ◽  
Friction Curve ◽  
Friction Performance ◽  
Ultra High Molecular Weight ◽  
Sintering Method

Porous ultra-high-molecular-weight polyethylene (UHMWPE) self-lubricating materials were designed and fabricated by a rotary sintering method, and the microstructure and properties were evaluated. Results showed that the rotary molding could not only significantly improve the molding efficiency but also formed uniform internal microstructures with high porosity, excellent mechanical properties, and low friction coefficient. Under oil lubricating conditions, the friction curve of samples quickly reached a steady state, the friction coefficient was reduced by 50%, and the repeat utilization was up to 99%. The following optimum sintering conditions were shown: Sintering temperature of 180 °C or 190 °C, sintering time determined as 10 min, and loading capacity of between 3.6 g and 3.8 g. Therefore, it is expected that this work will open a convenient and compatible strategy for fabricating porous materials with good self-lubricating performance.

Heat Preservation Time on the Properties of Red Mud Lightweight Insulation Brick

2014 ◽  
Vol 540 ◽  
pp. 225-228 ◽  
Author(s):  
Long Ma ◽  
Guo Zhong Li ◽  
Ji Rui Hu
Keyword(s):  
Electron Microscope ◽  
Fly Ash ◽  
Scanning Electron Microscope ◽  
Red Mud ◽  
Sintering Temperature ◽  
Raw Material ◽  
Sintering Process ◽  
Heat Preservation ◽  
Fluxing Agent ◽  
Scanning Electron

The red mud lightweight insulation brick was prepared by the sintering process as red mud, fly ash, bentonite as the main raw material, adding a certain amount of pore forming agent and fluxing agent. The sintering heat preservation time of red mud insulation brick on the properties was studied. The red mud lightweight insulation brick damage fracture microstructure was analyzed using scanning electron microscope (SEM) and the sintering mechanism was discussed preliminarily. The results show that with sintering temperature of 1100°C heating for 180 minutes, the performance of thermal insulation brick is better. When the heat preservation time extends to continue, the performances of sample remain stable basically.

Study on Sintering Process of Magnetic Abrasive Particles

2011 ◽  
Vol 337 ◽  
pp. 163-167 ◽  
Author(s):  
Yan Chen ◽  
M.M. Zhang ◽  
Z.Q. Liu
Keyword(s):  
Sintering Temperature ◽  
Sintering Process ◽  
Abrasive Machining ◽  
Iron Particles ◽  
Processing Efficiency ◽  
Abrasive Particles ◽  
Sintering Time ◽  
High Durability ◽  
Abrasive Process ◽  
Sintering Method

The magnetic abrasive prepared by sintering method, the aim is to change the internal structure of abrasive particles by sintering method, make the abrasive particles parceled on the surface of magnetic iron particles, and compared with the abrasive particles phase to get a kind of magnetic abrasive particles with high durability, strong magnetic, which can be magnetized in a magnetic field and improve processing efficiency and surface quality in magnetic abrasive machining. Sintering is used to prepare magnetic abrasive in this paper, to make iron particles, abrasive particles mixed with some binder, after suppression, drying, sintering, cooling, crushing and screening. This paper makes analysis for surface morphology and composition of the magnetic abrasive particles by scanning electron microscopy and discusses the effect that the abrasive particles size ratio, sintering time, sintering temperature on the magnetic abrasive, and the preparation of the magnetic abrasive process has been optimized.

Influence of Sintering Temperature on the Properties of Porous Quartz Ceramics via the Atmospheric Pressure Sintering Method

2011 ◽  
Vol 415-417 ◽  
pp. 1009-1012
Author(s):  
Jie Guang Song ◽  
Fang Wang ◽  
Yin Yan Ju ◽  
Ming Han Xu ◽  
Shi Bin Li
Keyword(s):  
Atmospheric Pressure ◽  
Yangtze River ◽  
Sintering Temperature ◽  
Raw Material ◽  
Price Ratio ◽  
The Yangtze River ◽  
River Sand ◽  
Sintering Method ◽  
Quartz Ceramics ◽  
Porous Quartz

Porous quartz ceramics were produced using river sand from the Yangtze River in China as the raw material via the atmospheric pressure sintering method. The influence of the sintering temperature on the density, the porosity, the porous structure and the outside shape of ceramics were investigated in this paper.The conclusions show that the sintering temperature increased, the microstructure of the samples changed accordingly and the density increased, while the porosity decreased, the micropores edge gradually become smooth. The optimum sintering temperature of porous quartz ceramics was obtained at 1100 °C as determined by an analysis of the performance price ratio of the porous quartz ceramics, the density is 1.25g/cm3, the porosity is 49.5%, the outside shape is regular, the micropore edge are smooth.

Study on Preparation of Ceramic Material and its Properties

2014 ◽  
Vol 686 ◽  
pp. 57-60
Author(s):  
Ya Li Liu
Keyword(s):  
Fly Ash ◽  
Red Mud ◽  
Bending Strength ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Porous Ceramic ◽  
High Strength ◽  
Porous Ceramics ◽  
Raw Material ◽  
High Porosity

This paper introduces the classification, properties and application of porous ceramic materials, reviewed preparation of porous ceramics. Taking fly ash and red mud as the main raw material to generate porous ceramics, the paper study the influence of different proportions of raw materials, sintering temperature, porosity of porous ceramic sample rate, bending strength, and microstructure. The results show that, fly ash and red mud proportioning and sintering temperature are the main factors that influence the structure and properties of samples. The 4# sample is a kind of high porosity and high strength quality of porous ceramics.

scholarly journals Synthesis and Na+ Ion Conductivity of Stoichiometric Na3Zr2Si2PO12 by Liquid-Phase Sintering with NaPO3 Glass

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3790
Author(s):  
Yongzheng Ji ◽  
Tsuyoshi Honma ◽  
Takayuki Komatsu
Keyword(s):  
Solid State ◽  
Liquid Phase ◽  
Sintering Temperature ◽  
Liquid Phase Sintering ◽  
Ion Conductivity ◽  
X Ray Diffraction ◽  
Conventional Solid State Reaction ◽  
X Ray ◽  
Sintering Time ◽  
Lower Activation

Sodium super ionic conductor (NASICON)-type Na3Zr2Si2PO12 (NZSP) with the advantages of the high ionic conductivity, stability and safety is one of the most famous solid-state electrolytes. NZSP, however, requires the high sintering temperature about 1200 °C and long sintering time in the conventional solid-state reaction (SSR) method. In this study, the liquid-phase sintering (LPS) method was applied to synthesize NZSP with the use of NaPO3 glass with a low glass transition temperature of 292 °C. The formation of NZSP was confirmed by X-ray diffraction analyses in the samples obtained by the LPS method for the mixture of Na2ZrSi2O7, ZrO2, and NaPO3 glass. The sample sintered at 1000 °C for 10 h exhibited a higher Na+ ion conductivity of 1.81 mS/cm at 100 °C and a lower activation energy of 0.18 eV compared with the samples prepared by the SSR method. It is proposed that a new LPE method is effective for the synthesis of NZSP and the NaPO3 glass has a great contribution to the Na+ diffusion at the grain boundaries.

scholarly journals Towards High Efficacy of Pd-Au/C Catalyst for Tetrachloromethane Hydrodechlorination

Chemistry ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 338-359
Author(s):  
Magdalena Bonarowska ◽  
Zbigniew Kaszkur ◽  
Krzysztof Matus ◽  
Alicja Drelinkiewicz ◽  
Tomasz Szumełda ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Gas Phase ◽  
Thermal Activation ◽  
Supported Catalysts ◽  
Carbon Support ◽  
Thermal Reduction ◽  
Microwave Oven ◽  
Optimal Conditions ◽  
Catalyst Activation ◽  
Critical Part

We present an efficient strategy for synthesising the PdAu catalysts with a homogeneous PdAu alloy phase for environmentally important hydrodechlorination of tetrachloromethane in the gas phase. The synthesis of carbon-supported catalysts involved two major steps: (i) incorporation of palladium and gold nanoparticles into carbon support and (ii) activation of the catalysts. The critical part of this work was to find the optimal conditions for both steps. Thus, the incorporation of the nanoparticles was carried out in two ways, by impregnation and direct redox reaction method using acetone solutions of metal precursor salts. The activation was performed either by a conventional thermal reduction in hydrogen or flash irradiation in a microwave oven. The homogeneity and structure of the PdAu alloy were found to depend on the catalyst activation method critically. In all cases, we observed better homogeneity for catalysts that were subject to microwave irradiation. Moreover, the flash microwave irradiation of prepared catalysts provided catalysts of better stability and selectivity towards the desired products (hydrocarbons) in the hydrodechlorination of tetrachloromethane as compared to the catalyst obtained by conventional thermal activation in hydrogen.

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