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Study on the In-situ Synthesis of Aluminum Titanate Sintered by Waste Aluminum Slag 被引量:9
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作者 沈阳 阮玉忠 于岩 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2009年第1期61-66,共6页
Aluminum titanate was in-situ synthesized by using industrial waste-residue in the aluminum factory and TiO2 as the main raw materials and the influence of different reaction temperatures on the purity and microstruct... Aluminum titanate was in-situ synthesized by using industrial waste-residue in the aluminum factory and TiO2 as the main raw materials and the influence of different reaction temperatures on the purity and microstructures of synthesized products were mainly discussed. The obtained Al2TiO5 was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and relevant analytical software. The results show that elevating the sintering temperature can increase the content of aluminum titanate; and at 1420 ℃, it reaches the highest in the synthesized ceramic. When the sintering temperature continues to increase, the produced aluminum titanate will decompose resulting in the drop of its content. Therefore, the optimum sintering temperature of in-situ synthesis of aluminum titanate is determined as 1420 ℃, at which the grains of aluminum titanate grow completely, the purity of aluminum titanate is 89.3wt%., the highest density is 2.75 g/cm^3, and the porosity is 9%. 展开更多
关键词 waste aluminum slag aluminum titanate sintering temperature in-situ synthesis
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Preparation and Microstructural Analysis of Smelting Waste Non-ferrous Metal Slag Geopolymer 被引量:1
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作者 赵晶 ZHANG Yuxuan ZHANG Yaowen 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2017年第6期1388-1391,共4页
The geopolymer samples were prepared with smelting waste slag of non-ferrous metal as the raw material and water glass as the activator. The effect of modulus of water glass and water binder ratio on the compressive s... The geopolymer samples were prepared with smelting waste slag of non-ferrous metal as the raw material and water glass as the activator. The effect of modulus of water glass and water binder ratio on the compressive strength was studied. The results show that the strength of the geopolymer activated by water glass with modulus of 1.1 and water binder ratio of 0.28 can maintain an increasing trend in the 90 curing days. Through the analyses with XRD, SEM(EDS), and FTIR, the main reaction products are found to be geopolymer gels, which bond the crystalline minerals to provide strength. The molecular chains of amorphous phase in slag become shorter after depolymerization-polycondensation. 展开更多
关键词 smelting waste slag of non-ferrous metal GEOPOLYMER compressive strength microstructureanalysis
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Smelting chlorination method applied to removal of copper from copper slags 被引量:6
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作者 李磊 王华 胡建杭 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第1期59-65,共7页
In order to reasonably utilize the iron resources of copper slags, the smelting chlorination process was used to remove copper from copper slags. Higher holding temperature and O2 flow rate are beneficial to increasin... In order to reasonably utilize the iron resources of copper slags, the smelting chlorination process was used to remove copper from copper slags. Higher holding temperature and O2 flow rate are beneficial to increasing copper removal rate. However,the Cu2O mode is formed by the reaction of surplus O2 and CuCl with O2 flow rate increasing over 0.4 L/min, causing CuCl volatilization rate and copper removal rate to decrease. The resulting copper removal rate of 84.34% is obtained under the optimum conditions of holding temperature of 1573 K, residence time of 10 min, Ca Cl2 addition amount of 0.1(mass ratio of CaCl2 and the copper slag) and oxygen flow rate of 0.4 L/min. The efficient removal of copper from copper slags through chlorination is feasible. 展开更多
关键词 copper slags smelting chlorination copper removal volatilization waste utilization
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A novel process for comprehensive utilization of vanadium slag 被引量:3
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作者 Li-ying Liu Tao Du +2 位作者 Wen-jun Tan Xin-pu Zhang Fan Yang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2016年第2期156-160,共5页
Traditional processes for treating vanadium slag generate a huge volume of solid residue and a large amount of harmful gas,which cause serious environmental problems.In this study,a new process for the comprehensive u... Traditional processes for treating vanadium slag generate a huge volume of solid residue and a large amount of harmful gas,which cause serious environmental problems.In this study,a new process for the comprehensive utilization of vanadium slag was proposed,wherein zeolite A and a V2O5/TiO2 system were synthesized.The structural properties of the as-synthesized zeolite A and the V2O5/TiO2system were characterized using various experimental techniques,including X-ray diffraction,X-ray fluorescence,scanning electron microscopy,and infrared spectroscopy.The results reveal that zeolite A and the V2O5/TiO2 system are successfully obtained with high purity.The results of gas adsorption measurements indicate that the prepared zeolite A exhibits high selectivity for CO2 over N2 and is a candidate material for CO2 capture from flue-gas streams. 展开更多
关键词 vanadium slag zeolite waste utilization structural properties
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Mechanical and environmental properties of geopolymer-stabilized domestic waste incineration slag in an asphalt pavement base 被引量:1
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作者 Xiaoping Ji Bo Chen +4 位作者 Xinze Dong Honglei Lu Xueyuan Zhang Shupeng He Tongda Wu 《Journal of Road Engineering》 2023年第2期218-228,共11页
Domestic waste incineration slag(WIS)includes fly ash and slag.Fly ash is classified as hazardous waste because it contains heavy metals.Most of slag are directly stacked or landfilled due to problems such as large ou... Domestic waste incineration slag(WIS)includes fly ash and slag.Fly ash is classified as hazardous waste because it contains heavy metals.Most of slag are directly stacked or landfilled due to problems such as large output and low utilization rate.Harmless treatment is imminent.If WIS is used effectively in the road engineering,which can realize the high-quality and high-efficiency recycling of WIS,and it is of great significance to save resources and protect the environment.This study applies a geopolymer prepared from WIS fly ash as a stabilizing agent in WIS blending macadam for use as a pavement base mixture,and reports the mechanical properties(unconfined compressive strength,splitting strength,and resilience modulus)of the geopolymer-stabilized WIS blending macadam(GeoWIS).The leaching concentrations of harmful heavy metals of GeoWIS soaked in water were also investigated.Finally,the strength formation and heavy metal stability mechanisms were explored.The unconfined compressive strength,splitting strength,and compressive resilient modulus of GeoWIS all increased with increasing geopolymer content and decreasing WIS content.The strength of GeoWIS was derived from its geopolymerization and hydration products(C-S-H gel,N-A-S-H gel,and AFt).When the geopolymer content reached 12%–14%,the GeoWIS without natural macadam met the strength criterion of the asphalt pavement base.Through physical adsorption and chemical bonding,the geopolymer significantly reduced the leaching of harmful heavy metals.In GeoWIS with 50%WIS and stabilized with 10%geopolymer,the Cr,Ni,Cd,and Pb concentrations met the grade III groundwater standard.Concentrations of heavy metals leached from GeoWIS are low and exert little impact on environment. 展开更多
关键词 Domestic waste incinerator slag Fly ash Geopolymer-stabilized macadam Heavy metal leaching concentration
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Catalysts derived from waste slag for transesterification
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作者 Xiaowei Zhang Wei Huang 《Journal of Natural Gas Chemistry》 EI CAS CSCD 2011年第3期299-302,共4页
MgO-CaO/SiO2 solid catalysts derived from waste slag (WS) of metal magnesium plant were prepared. The catalytic performances were evaluated in the transesterification of rapeseed oil with methanol to biodiesel in a ... MgO-CaO/SiO2 solid catalysts derived from waste slag (WS) of metal magnesium plant were prepared. The catalytic performances were evaluated in the transesterification of rapeseed oil with methanol to biodiesel in a 500 mL three-necked reactor under atmospheric pressure. The basic strengh of the catalyst reached 22.0 measured by indicators accroding to Hammett scale. The results show that the MgO-CaO/SiO2 is an excellent catalyst for transesterification, and the conversion of rapeseed oil reach 98% under the optimum condition. 展开更多
关键词 waste slag solid catalyst BIODIESEL TRANSESTERIFICATION
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Site Selection of Waste Slag Yard and Design of Protective Measures in Water Supply Project of Drawing from the Songhua River in Central Cities of Jilin
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作者 Hongchao LIU Jun LV 《Meteorological and Environmental Research》 CAS 2021年第4期49-51,共3页
Water supply project of drawing from the Songhua River in central cities of Jilin is taken as research object.On the basis of analyzing project characteristics and natural conditions of the project area,site selection... Water supply project of drawing from the Songhua River in central cities of Jilin is taken as research object.On the basis of analyzing project characteristics and natural conditions of the project area,site selection of waste slag yard of water diversion project and design of water and soil conservation measures are discussed.Rationality of site selection of waste slag yard and pertinence of prevention and control measures of water and soil loss in waste slag yard are analyzed,and comprehensive utilization of waste slag in large-scale production and construction projects is explored. 展开更多
关键词 Waste slag yard Layout principle Prevention and control measures Comprehensive utilization of waste slag Water supply project of drawing from the Songhua River Jilin
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Synthesis of Calcium Hexaluminate from Waste Slag of Aluminum and Oyster Shell
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作者 庄国鑫 何亚军 +1 位作者 MALCOLM Clark 于岩 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2016年第1期157-165,共9页
Waste aluminum slag and oyster shell were used as raw materials to synthesize calcium hexaluminate(CA6). The effects of different source materials of CaO and sintering temperature on the structures and properties of... Waste aluminum slag and oyster shell were used as raw materials to synthesize calcium hexaluminate(CA6). The effects of different source materials of CaO and sintering temperature on the structures and properties of CA6 were investigated,respectively. The results show that compared to calcium oxide,oyster shell can lower the formation temperature of CA6,hence CA6 can be detected at 1300 ℃ by using oyster shell as the starting raw materials. Increasing the sintering temperature can promote the crystal growth. CA6 crystals show typical platelet shape,and its optimum sintering temperature falls in the 1450~1550 ℃ region. The bulk density is 1.54~1.83 g/cm^3,the apparent porosity is 44.1~55.2% and the flexural strength is 10.8~25.3 MPa. 展开更多
关键词 waste aluminum slag calcium hexaluminate oyster shell powder
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Utilization of recycled solid waste as ecological reclamation materials based on plant growth experiments and soil quality analysis
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作者 QIN Xiaochun NI Anchen +2 位作者 YANG Dongxiao XING Wenhu LIU Shiliang 《Journal of Mountain Science》 SCIE CSCD 2024年第3期820-834,共15页
During the highway construction,a large number of spoil areas will be generated while a large amount of waste slag and soil could not be rationally utilized.Besides,the vegetation recovery is slow in the spoil areas d... During the highway construction,a large number of spoil areas will be generated while a large amount of waste slag and soil could not be rationally utilized.Besides,the vegetation recovery is slow in the spoil areas due to the soil depletion.Aiming at recycling the solid waste,the sieved engineering waste slag with local red clay and corn straw biochar was supplied to solve the problem of insufficient nutrients in engineering waste slag and soil.In addition,planting experiments of alfalfa(Medicago sativa L.)and Amorpha fruticosa L.combined with physical and chemical experiments were carried out to prove the feasibility of the novel improved substrate for the reclamation of spoil areas.The results show that the substrate's improvement effect is mainly affected by the soil to slag ratio and the biochar content.The improvement effect of soil matrix in highway spoil area decreases with the increase of the waste slag content,especially when the soil-slag ratio is less than 3,and the promotion of plants is limited.On the contrary,the improvement effect is proportional to the biochar content(3%-8%).But it is noted that the Cu and Pb in the soil will exceed the clean limit corresponding to the Nemero soil pollution index level when the biochar content is 8%.Therefore,it is recommended that the soil-slag ratio should be≥3,and the biochar content should reach 3%-5%.This research provides experimental basis and technical support for utilizing solid waste resources in the reclamation of highway spoil areas. 展开更多
关键词 HIGHWAY Spoil area Waste slag Modified soil Ecological reclamation
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Researches on the Structure and Properties of Mullite Solid Solution Made from Industrial Waste 被引量:4
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作者 RUAN Yu-Zhong YU Yan WU Ren-Ping 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2006年第8期965-970,共6页
The waste slag from aluminum profile factory and silicon fine powder from ferroalloy factory were utilized as the main raw materials to synthesize mullite solid solution Al4+2xSi2-xO10-x/2, whose defect formation mec... The waste slag from aluminum profile factory and silicon fine powder from ferroalloy factory were utilized as the main raw materials to synthesize mullite solid solution Al4+2xSi2-xO10-x/2, whose defect formation mechanism, crystalline phase composition, crystal cell parameters, microstructures and morphologies were characterized in detail by XRD and SEM. The results show that because of the ultrafine particle size of the materials, the content of mullite solid solution synthesized by this method is higher than that by regular method. Keywords: waste slag from aluminum factory, silicon fine powder, mullite, solid solution 展开更多
关键词 waste slag from aluminum factory silicon fine powder MULLITE solid solution
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Research Progress on Porous Ceramics Prepared from Industrial Solid Wastes 被引量:1
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作者 GAO Zhi REN Xinming +2 位作者 MA Beiyue YU Jingkun LIU Guoqi 《China's Refractories》 CAS 2019年第3期33-38,共6页
The situation of porous ceramics prepared from industrial waste slag(fly ash,red mud,metallurgical slag,tailings,etc.)was summarized.It was pointed out that the preparation of porous ceramics from industrial waste sla... The situation of porous ceramics prepared from industrial waste slag(fly ash,red mud,metallurgical slag,tailings,etc.)was summarized.It was pointed out that the preparation of porous ceramics from industrial waste slag can bring long-term economic and social benefits.The development trend of secondary utilization of industrial waste slag was also prospected. 展开更多
关键词 industrial waste slag porous ceramics secondary utilization
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Recovery of rare earths and aluminum from FCC waste slag by acid leaching and selective precipitation 被引量:5
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作者 Jinyu wang Xiaowei Huang +5 位作者 Dali Cui Liangshi Wang Zongyu Feng Bin Hu Zhiqi Long Na Zhao 《Journal of Rare Earths》 SCIE EI CAS CSCD 2017年第11期1141-1148,共8页
This paper investigated the recovery of rare earth elements(REEs) and aluminum(AI) from the waste slag discharged by FCC catalyst factory(FCC waste slag) via acid leaching and selective precipitation.Analysis methods ... This paper investigated the recovery of rare earth elements(REEs) and aluminum(AI) from the waste slag discharged by FCC catalyst factory(FCC waste slag) via acid leaching and selective precipitation.Analysis methods such as ICP-AES, XRF and XRD were applied to obtain experiment data. The maximum leaching efficiency of REEs and Al was achieved at pH value of 1 and with liquid to solid ratio of 4:1,Under such conditions, 91.01%, 92.24% and 94.77% of La, Ce and Al were extracted at 20 ℃ for 2 h from the FCC waste slag, respectively. The SiOcontent in the leaching residue was 88.3%, which can be used as an available silicon resource. The REEs can be precipitated in the form of REEs and sodium double sulfate(NaRE(SO)·xHO) by adding NaSOto the leaching solution, while Al remained in the solution. Afterwards, the pH value of the filtrate was adjusted to 4.5, and Al was precipitated as AI(OH). Finally,NaRE(SO)·xHO and Al(OH)were converted into RECland Al(SO4)solution,respectively, which were recycled to manufacture zeolite. This process recovered REEs and Al from the FCC waste slag and reduced the emissions of waste slag simultaneously, which has an important economic and environment significance. 展开更多
关键词 Rare earth ALUMINUM RECOVERY FCC catalyst Waste slag
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Variability of waste copper slag concrete and its effect on the seismic safety of reinforced concrete building: A case study
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作者 Swetapadma PANDA Nikhil P.ZADE +1 位作者 Pradip SARKAR Robin DAVIS 《Frontiers of Structural and Civil Engineering》 SCIE EI CSCD 2022年第1期117-130,共14页
Proven research output on the behavior of structures made of waste copper slag concrete can improve its utilization in the construction industry and thereby help to develop a sustainable built environment.Although num... Proven research output on the behavior of structures made of waste copper slag concrete can improve its utilization in the construction industry and thereby help to develop a sustainable built environment.Although numerous studies on waste copper slag concrete can be found in the published literature,no research has focused on the structural application of this type of concrete.In particular,the variability in the strength properties of waste copper slag concrete,which is required for various structural applications,such as limit state design formulation,reliability-based structural analysis,etc.,has so far not attracted the attention of researchers.This paper quantifies the uncertainty associated with the compressive-,flexural-and split tensile strength of hardened concrete with different dosages of waste copper slag as fine aggregate.Best-fit probability distribution models are proposed based on statistical analyses of strength data generated from laboratory experiments.In addition,the paper presents a reliability-based seismic risk assessment of a typical waste copper slag incorporated reinforced concrete framed building,considering the proposed distribution model.The results show that waste copper slag can be safely used for seismic resistant structures as it results in an identical probability of failure and dispersion in the drift demand when compared with a conventional concrete building made of natural sand. 展开更多
关键词 waste copper slag quantification of variability goodness-of-fit test seismic risk assessment PSDM
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