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Insights into clinker-clay interactions in stabilized soft clay using NMR,TEM,and FTIR 认领 引用
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作者 Jun Wu Changming Wan +3 位作者 Zhenshun Hong Annan Zhou Yunzhi Tan Yongfeng Deng 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2025年第10期6636-6647,共12页
Interactions between cement clinkers and clay minerals are crucial to the much lower strength of cement-based stabilized clays than concrete or mortar.In this paper,the kaolinite-based and montmorillonite-based clays ... Interactions between cement clinkers and clay minerals are crucial to the much lower strength of cement-based stabilized clays than concrete or mortar.In this paper,the kaolinite-based and montmorillonite-based clays were respectively stabilized by tricalcium silicate(C3S)and tricalcium aluminate(C3A),and measured by the unconfined compressive strength(UCS),29Si/27Al solid state nuclear magnetic resonance(SS-NMR),Fourier transform infrared spectroscopy(FTIR),and transmission electron microscope(TEM)to probe the clinker-clay mineral interaction from macro-mechanical,mineralogical,and microstructural perspectives.The results show that C3A-stabilized samples gain strength rapidly in the first 3 d but are only 20%e60%of the strength of C3S-stabilized ones after 60 d.Microstructures reveal that montmorillonite shows better pozzolanic reactivity due to its superior Sichain and lattice substitution compared to kaolinite.This interaction domains the engineering performance of stabilized clays,benefiting the design of stabilizer referring to as the industrial by-products and clay minerals. 展开更多
关键词 Cement-based stabilized soft clay Clay mineral Cement clinker constituent Solid state nuclear magnetic resonance(SSNMR) Fourier transform infrared spectroscopy(FTIR)
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Modification of MgO-CaO Clinkers for Hydration Resistance 认领 引用 被引量：1
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作者 SHE Aixin LI Ningbo +2 位作者 HUANG Ren HUANG Zhong ZHANG Haijun 《China's Refractories》 CAS 2025年第1期12-17,共6页
Mgo-Cao refractories are widely used in the iron and steel metalurgy industry due to their advantages of purifying molten steel,high refractoriness,good thermal shock resistance,and excellent corrosion resistance to b... Mgo-Cao refractories are widely used in the iron and steel metalurgy industry due to their advantages of purifying molten steel,high refractoriness,good thermal shock resistance,and excellent corrosion resistance to basic slags.However,hydration occurs during the manufacturing,storage,and transportation of refractories,which severely limits their application.Mgo-CaO clinker is the main raw material for Mgo-Cao refractories,and its hydration resistance determines the development of the latter case.Herein,the Mgo-Cao clinker was modified using myristic acid as the modifying agent by the liquid-phase deposition method.The effects of the particle size of the raw materials,concentration of myristic acid,treatment temperature and time on the phase composition and hydration resistance of the modified Mgo-Cao clinkers were investigated in detail.The results show that the samples with an agent concentration of 0.25 mol L-1 and treated at 25℃ for 1 h exhibit the optimal hydration resistance properties,namely a low hydration mass gain rate(0.23%)and a large water contact angle(152.9). 展开更多
关键词 Mgo-Cao clinkers surface modification liquid-phase deposition method hydration resistance
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Prediction of Free Lime Content in Cement Clinker Based on RBF Neural Network 认领 引用 被引量：10
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作者 YUAN Jingling ZHONG Luo +1 位作者 DU nongfu TAO Haizheng 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2012年第1期187-190,共4页
Considering the fact that free calcium oxide content is an important parameter to evaluate the quality of cement clinker, it is very significant to predict the change of free calcium oxide content through adjusting th... Considering the fact that free calcium oxide content is an important parameter to evaluate the quality of cement clinker, it is very significant to predict the change of free calcium oxide content through adjusting the parameters of processing technique. In fact, the making process of cement clinker is very complex. Therefore, it is very difficult to describe this relationship using the conventional mathematical methods. Using several models, i e, linear regression model, nonlinear regression model, Back Propagation neural network model, and Radial Basis Function （RBF） neural network model, we investigated the possibility to predict the free calcium oxide content according to selected parameters of the production process. The results indicate that RBF neural network model can predict the free lime content with the highest precision （1.3%） among all the models. 展开更多
关键词 RBF neural network cement clinker free lime content
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Simulation of clinker grinding circuits of cement plant based on process models calibrated using GA search method 认领 引用 被引量：3
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作者 A.Farzanegan E.Ghasemi Ardi +1 位作者 A.Valian V.Hasanzadeh 《Journal of Central South University》 SCIE EI CAS 2014年第2期799-810,共12页
Particle size distributions of obtained samples from several sampling campaigns were determined and raw data were mass balanced before being used in simulation studies.After determination of breakage function,selectio... Particle size distributions of obtained samples from several sampling campaigns were determined and raw data were mass balanced before being used in simulation studies.After determination of breakage function,selection function,Bond work index,residence time distribution parameters,and Whiten's model parameters for air separators and diaphragms between the two compartments of tube ball mills,performance of the circuits was simulated for given throughputs and feed particle size distribution.Whiten's model parameters were determined by GA(genetic algorithm) toolbox of MATLAB software.Based on implemented models for modeling and simulation,optimization of circuits was carried out.It increased nearly 10.5% and 15.8% in fresh feed capacity input to each tube ball mill.In addition,circulating load ratios of circuits are modified to 118% and 127% from low level of 57% and 22%,respectively,and also cut points of air separators are adjusted at 30 and 40 μm from high range of 53 and 97 μm,respectively.All applications helped in well-operation and energy consumption reduction of equipments. 展开更多
关键词 cement plant clinker grinding genetic algorithm simulation optimization
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Effect of CuO on the Burnability and Mineral Formation of High C_3S Cement Clinker 认领 引用 被引量：3
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作者 CHEN Huxing MA Xianwei WANG Peiming 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2010年第5期838-844,共7页
The effect of CuO on the clinkering process and mineral structure,components and morphology of high C3S cement clinker was studied.One reference mixture was prepared according to the potential mineral phase components... The effect of CuO on the clinkering process and mineral structure,components and morphology of high C3S cement clinker was studied.One reference mixture was prepared according to the potential mineral phase components C3S=75%,C3A=7%,C4AF=18%and then was mixed,respectively,with 0.5%,1%,1.5%,2%,2.5%and 4%CuO.All samples were heated at a rate of 10°C/min to the design temperatures and then maintained for 40 min.Analyses by the glycerol-ethanol method,XRD and SEM-EDS show that the minimum of free lime(f-CaO)content was related to temperature and CuO amount.The higher the temperature,the lower the amount of CuO corresponding to the f-CaO minimum content.CuO promotes the formation and growth of C3S and C4AF and a new compound is found.In addition,these phenomena are discussed theoretically.In conclusion,CuO alters the burnability and the formation and structure of C3S in a high C3S cement system. 展开更多
关键词 CuO tricalcium silicate burnability cement clinker mineral formation
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Optimization of the Content of Tricalcium Silicate of High Cementing Clinker 认领 引用 被引量：2
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作者 CHEN Lin SHEN Xiaodong +2 位作者 MA Suhua HUANG Yeping ZHONG Baiqian 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2011年第3期578-582,共5页
Optimization of the content of tricalcium silicate(C 3 S)of high cementing clinker was investigated.The content of free-CaO(f-CaO),mineral composite,the content of C 3 S in the clinker and the hydration product were a... Optimization of the content of tricalcium silicate(C 3 S)of high cementing clinker was investigated.The content of free-CaO(f-CaO),mineral composite,the content of C 3 S in the clinker and the hydration product were analyzed by chemical analysis and X-ray diffraction(XRD)."K Value"method of QXRD was selected as a quantitative analysis way to measure the content of C 3 S,and the strength of cement paste was determined.The results show that at a water cement ratio of 0.29,the strength of cement paste with 73%C 3 S can be up to 97.5 MPa at 28 days age.The strength at 28 d of cement with 73%C 3 S is 16%higher than that with 78%C 3 S at water requirement for normal consistency.The relationship between the strength of high cementing Portland cement and the content of C 3 S in the clinker is nonlinear.According to the strength of cement paste,the optimal content of C 3 S in cement clinker is around 73%in this paper. 展开更多
关键词 optimization tricalcium silicate high cementing clinker cement paste
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Composition Design for High C_3S Cement Clinker and Its Mineral Formation 认领 引用 被引量：9
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作者 侯贵华 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2007年第1期56-60,共5页
A new composition of Portland cement clinker was studied, in which KH, SM and IM was 0.98,2.4 and 2.4 respectively as well as its meal added 1%CuO （in mass）. Fired at 1 200℃,1 350℃,1 400℃ and 1 450℃ for 30 min, ... A new composition of Portland cement clinker was studied, in which KH, SM and IM was 0.98,2.4 and 2.4 respectively as well as its meal added 1%CuO （in mass）. Fired at 1 200℃,1 350℃,1 400℃ and 1 450℃ for 30 min, the resultant mineral phases component and mineral morphology were analyzed. The performances of the cement which was made of clinker burned at 1 450℃ and fly ash were determined. By means of QXRD, XRD and optical microscopy, it is shown that the clinker burnt at 1 450℃ has the larger size crystals and distinct crystal interface, in which the C3S content is 73.37% and the mineral phases is dominantly C3S, following by minor C2S, C3A and tetracalcium aluminoferrite. The results reveal that a new type of high C3S content clinker can completely be made by traditional temperature-time schedule. The performances of the cement produced from this clinker with addtion of 50% fly ash and 5% gupsum were in agreement with the 32.5 strength grade of Portland fly-ash cement. The results also show that the clinker has a significant effect of saving energy and utilizing waste slag. 展开更多
关键词 tricalcium silicate fly ash cement clinker copper oxide
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Influence of Characteristics of Alumina-silicate Raw Materials on the Formation Process of Clinker 认领 引用 被引量：1
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作者 王亚丽 CUI Suping +2 位作者 LAN Mingzhang TIAN Guiping LIU Lingling 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2014年第5期966-971,共6页
The traditional alumina-silicate raw materials, for example, clays, in the precalcining technique of cement production, have been replaced by low grade and high silica content sandstones, shales, and industrial waste ... The traditional alumina-silicate raw materials, for example, clays, in the precalcining technique of cement production, have been replaced by low grade and high silica content sandstones, shales, and industrial waste residues, including fly ashes, slag, and others. The results are the change of compositions and characteristics of raw materials applied and a great effect on cement calcination process and clinker formation. In this work, the cement clinker formation process of different alumina-silicate raw materials to replace clay raw material was studied by chemical analysis, X-ray diffraction, differential thermal analysis, and high temperature microscope based on the characteristics of the alumina-silicate raw materials. The formation heat of the clinker was determined by the acid dissolution method. Influence of different alumina-silicate raw materials on the clinker burnability and formation process was studied. The results show that the changing of alumina- silicate raw materials, especially using industrial waste residues, can reduce the formation temperature of high temperature liquid phases, improve the burnability of raw materials, reduce the formation temperature and formation heat of clinker. And this study also observed the formation temperature and transformation of high temperature liquid phases in the heating process of raw materials by high temperature microscope. 展开更多
关键词 precalcining technique of cement production alumina-silicate raw materials burnability of raw materials high temperature liquid phase formation heat of clinker
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NMR Research on Cement Clinker and Its Structures in Early Age Hydration 认领 引用 被引量：1
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作者 WANG Xiaojun ZHU Wenwen WANG Hui 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2011年第5期972-977,共6页
Clinker has long been regarded as a critical factor for cement hydration and solidification.α-C2S andβ-C2S in 2CaO·SiO2(C2S)phase and C3S Monoclinic 1(C3S M1)and C3S Monoclinic 3(C3S M3)in 3CaO·SiO2(C3S)ph... Clinker has long been regarded as a critical factor for cement hydration and solidification.α-C2S andβ-C2S in 2CaO·SiO2(C2S)phase and C3S Monoclinic 1(C3S M1)and C3S Monoclinic 3(C3S M3)in 3CaO·SiO2(C3S)phase were clearly recorded in the 29Si MAS NMR spectra.The content of C3S phase in the clinker deduced from the fine peak analysis coincides with the phase quantification analysis calculated by the Taylor-Bogue method based on XRF,which also accords to the statistical data in industrial production.NMR provides a proof that C3S M1 andβ-C2S phases have a prior reaction in the early age hydration of clinker,and demonstrates that aluminum coordination changes from tetracoordinated 4CaO·Al2O3·Fe2O3(C4AF)to hexacoordinated[Ca2Al(OH)6](SO4)0.3·3H2O(Aft)in one day hydration and changes to the 3CaO·Al2O3·CaSO4·nH2O(Afm)in a seven-day hydration. 展开更多
关键词 NMR clinker cement hydration
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RESEARCH ON RELATION BETWEEN MELTING POINT OF CEMENT CLINKER AND HEATING RATE 认领 引用 被引量：1
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作者 王怀德 王丹 王炳华 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 1996年第4期7-13,共7页
The relation between the melting point of Portland cement raw meal and its heating rate have been studied. The raw meal was burnt at different heating rate ranging from 10 similar to 900 degrees C/min Dy the following... The relation between the melting point of Portland cement raw meal and its heating rate have been studied. The raw meal was burnt at different heating rate ranging from 10 similar to 900 degrees C/min Dy the following methods: (A) in electric resistance furnace; (B) in DTA-TG analyzer with infrared ray focused heating; (C) in high temperature microscope with electron stream heating. Based on thermal analysis theory and melt theory and the tests above, it is found that melting point T-m of cement raw meal decreases with the increased heating rate Phi during burning in the following relation: T-m=1280-0.107 empty set. 展开更多
关键词 cement clinker burning melting point heating rate
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Crystallization Characteristic of Periclase in Clinker and Effect of Mg2+ on Hydrate of Cement Pastes 认领 引用 被引量：2
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作者 SONG Qiang HU Yaru CHEN Yanxin 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2019年第6期1384-1395,共12页
Crystallization characteristic of periclase in clinker and effect of Mg^2+ on hydrate of cement pastes were investigated. Morphologies and relative content of periclase were characterized with scanning electron micros... Crystallization characteristic of periclase in clinker and effect of Mg^2+ on hydrate of cement pastes were investigated. Morphologies and relative content of periclase were characterized with scanning electron microscopy and X-ray diffraction. Derivative thermogravimetry analysis and backscattered electron imaging were used to characterize the effect of Mg^2+ on hydrate of cement pastes. The experimental results show that in ample space, periclase forms octahedron structure, and subhedral or anhedral crystal is formed in limited space. Due to the accelerated burning temperature and prolonged holding time, coarse pericalase crystals are formed. Mg(OH)2 particle thickness increases due to faster crystal growth rate along c axis at later age. Mg^2+can substitute Ca^2+ in C-S-H or C-A-H to form magnesium silicate hydrate(M-S-H) or magnesium aluminate hydrate(M-A-H), and the substitution extent for C-A-H is higher than that for C-S-H. Cured in 80 ℃ water, the decalcification rate of C-A-H in pastes is higher than that cured in 50 ℃ water. M-A-H with an atomic Mg/Al ratio of 2 is formed through substitution of Ca by Mg in C-A-H. 展开更多
关键词 high magnesium clinker periclase magnesium silicate hydrate magnesium aluminate hydrate
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Effect of Minor Elements on Silicate Cement Clinker 认领 引用 被引量：1
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作者 黄从运 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2005年第3期116-118,共3页
The effect of rare-earth and HX addition agent on the burn-ability of silicate cement dinker was investigated by orthogonal experiment. The result shows, compared with blank sample, f CaO of the .samples added with ra... The effect of rare-earth and HX addition agent on the burn-ability of silicate cement dinker was investigated by orthogonal experiment. The result shows, compared with blank sample, f CaO of the .samples added with rare-earth and HX agent drops by 84.95% , its 3 d and 28d compressive strength enhances by 24.40% and 16.90% , respectively. It was discovered by means of X-ray diffrnction and high temperature microscope analysis that sintering temperature of the sample added with rare-earth and HX addition agent is about 1320℃. At the same time, the tmrning temperature of triealeium silicate desends and its crystal growth forming- rate increases. Tricalcium silicate content in burning clinker is higher and its crystal is larger. 展开更多
关键词 rare-earth silicate clinker f-CaO tricalcium silicate strength
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Effect of Microwave Processing on Aluminate Cement Clinkering 认领 引用 被引量：1
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作者 董健苗 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2005年第2期77-79,共3页
When raw materials were preheated to 1000-1300 ℃ by electricity and microwave was inputted for 1 min 5 s-4 mins, then alunminate clinkers were obtained. The f-CaO contents,XRD patterns and lithofacies analysis show t... When raw materials were preheated to 1000-1300 ℃ by electricity and microwave was inputted for 1 min 5 s-4 mins, then alunminate clinkers were obtained. The f-CaO contents,XRD patterns and lithofacies analysis show that the microwave processing accelerates the clinkering reaction,and Fe_2O_3 is contributed to the aluminate cement clinkering. The appearance of liquid phase in process of microwave heating increases the microwave absorbability of materials greatly. 展开更多
关键词 microwave promoting clinkering aluminate cement f-CaO X-ray diffraction lithofacies photo
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Quantitative XRD Analysis of Cement Clinker by the Multiphase Rietveld Method 认领 引用 被引量：1
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作者 洪汉烈 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2003年第3期56-59,共4页
Quantitative phase analysis of Portland cement clinker samples was performed using an adaptation of the Rietveld method.The Rietveld quantitative analysis program,originally in Fortran 77 code,was significantly modifi... Quantitative phase analysis of Portland cement clinker samples was performed using an adaptation of the Rietveld method.The Rietveld quantitative analysis program,originally in Fortran 77 code,was significantly modified in visual basic code with windows 9X graph user interface,which is free from the constraint of direct utilizable memory 640 k,and can be conveniently operated under the windows environment.The Rietveld quantitative method provides numerous advantages over conventional XRD quantitative method,especially in the intensity anomalies and superposition problems.Examples of its use are given with the results from other methods.It is concluded that,at present,the Rietveld method is the most suitable one for quantitative phase analysis of Portland cement clinker. 展开更多
关键词 microscopic analysis clinker Portland cement Rietveld method
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Effect of Fused MgO-ZrO_2 Clinker Addition on Thermal Shock Resistance of MgO-ZrO_2 Unfired Bricks 认领 引用 被引量：1
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作者 LI Jiwei ZHOU Ningsheng BAI Hongyu 《China's Refractories》 CAS 2008年第4期11-15,共5页
MgO -ZrO2 unfired bricks with ZrO2 content up to 8% at the interval of 2% were prepared, using fused magnesia （ MgO ： 97% ） and fused MgO - ZrO2 clinker （ ZrO2 ： 14. 33% ） as starting materials and phenolic resi... MgO -ZrO2 unfired bricks with ZrO2 content up to 8% at the interval of 2% were prepared, using fused magnesia （ MgO ： 97% ） and fused MgO - ZrO2 clinker （ ZrO2 ： 14. 33% ） as starting materials and phenolic resin as binder. The effects of ZrO2 content on thermal shock resistance （TSR） and other properties such as cold and hot modulus of rupture have been investigated. Re- sidual cold modulus of rupture ratio after heating at 1 000 ℃ and quenching by air blowing was adopted to characterize TSR. Addition of the MgO -ZrO2 clinker improves TSR, attributing to the microcrack toughening effect by thermal expansion mismatch between different phases. When ZrO2 content goes above 4%. the impro- ving effect tends to be moderate. The introduction of MgO- ZrO2 clinker can also improve the HMOR at 1 500 ℃, while the increased ZrO2 content reduces CMOR of the bricks prefired at 1 600 ℃, due to the thermal expansion mismatch effect. Compromising the overall properties, the optimal ZrO2 content for such magnesia based unfired brick is suggested to be 4%. 展开更多
关键词 Magnesia - zirconia system Unfired brick Thermal shock resistance Magnesia-zirconia clinker
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EFFECTS OF DIFFERENT BURNING PROCESSES ON THE FORMATION KINETICS OF CEMENT CLINKER 认领 引用 被引量：1
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作者 雷家珩 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 1999年第3期28-34,共7页
Two different methods of burning ce- ment clinker, a rapid burningmethod and an ordinary burning method used in rotary kiln,respectively, were compared in the laboratory. By means ofdetermining f_cao in the clinkers, ... Two different methods of burning ce- ment clinker, a rapid burningmethod and an ordinary burning method used in rotary kiln,respectively, were compared in the laboratory. By means ofdetermining f_cao in the clinkers, rate constant K_r and diffusionactivation en- ergy E_a in the two processes of clinker formationwere cal- culated by using Ginstling-Brounshtein diffusion equationand Arrhenius equation. 展开更多
关键词 Portland cement clinker formation rapid burning
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Behavior of SiO_2 in the leaching process of alumina clinker with high concentration 认领 引用 被引量：2
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作者 Bin Chen Xiaobin Li Guihua Liu 《Journal of University of Science and Technology Beijing》 2008年第5期538-542,共5页
It is essential for alumina production by alkaline process to know the behavior of minerals containing Al and Si in basic solution,and the behavior of SiO2 in the process of clinker leaching is an important portion. T... It is essential for alumina production by alkaline process to know the behavior of minerals containing Al and Si in basic solution,and the behavior of SiO2 in the process of clinker leaching is an important portion. To study the behavior of SiO2 in the process of high concentration clinker leaching,experiments were carried out in home-made reactors. The results indicate that factors,such as temperature,time,Al2O3 concentration,as well as SiO2 concentration,have profound impact on the SiO2 and Al2O3 concen-tration of pregnant liquor during the high concentration leaching. However,sodium carbonate and free caustic soda concentrations have no remarkable effect on it,thus they are the secondary factors compared with Al2O3 concentration. The concentration of SiO2 in the pregnant liquor could be reduced to a lower level when the major effect parameters of this process are controlled properly. 展开更多
关键词 clinker leaching high concentration silica mechanism of secondary reaction
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Effects of Clinker Contents of Different C_3A and C_4AF on the Performance of PSC Cement 认领 引用
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作者 万惠文 吴有武 +2 位作者 CHEN Chao WEI Pengliang GAO Zhifei 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2013年第3期521-526,共6页
Phosphogypsum-slag-clink （PSC） cement were prepared by original phosphogypsum（PG）, which was grinded after dried at 60 ℃combined with different contents of phosphogypsum （15%, 20%, 30%）, and a small amount of d... Phosphogypsum-slag-clink （PSC） cement were prepared by original phosphogypsum（PG）, which was grinded after dried at 60 ℃combined with different contents of phosphogypsum （15%, 20%, 30%）, and a small amount of different C3A, C4AF contents of finely ground cement clinker, and ground granulated blast furnace slag （GGBFS）. Physical mechanical and sugaring properties were studied. The results show that compressive strength of PSC cement with 20% phosphogypsum at 3 d ages would be higher than 17 MPa and even 50 MPa at 28 days. Compressive strength at longer curing stage and sugaring properties of PSC with lower content of C3A higher C4AF clinker were improved, pH value of PSC cement system at early stage was relatively low, and pH gradually increased with the addition of clinker, pH increased firstly and then decreased with the hydration stage. SEM analyses showed that the amount of ettringite, which was influenced by pH and content of A1, must be controlled in PSC cement system, which may cause damage to microstructure or even expansive cracks if large amount of ettringite formed in hardened paste. 展开更多
关键词 phosphogypsurn clinker ettringite surface sugaring
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Research of green cement clinker calcinated from ferrochrome slag 认领 引用
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作者 LIU Xiao-bo FU Yong-jian +2 位作者 XIAO Qiu-guo JIN Yi-su LIU Xiao-ping 《Journal of Environmental Sciences》 SCIE EI CAS 1999年第4期403-406,共4页
Ferrochrome slag is a kind of industrial waste containing Cr6+and is produced in the process of silico ferrochrome smelting.On the basis of analyzing the chemical composition and mineral composition of ferrochrome ... Ferrochrome slag is a kind of industrial waste containing Cr6+and is produced in the process of silico ferrochrome smelting.On the basis of analyzing the chemical composition and mineral composition of ferrochrome slag,this paper has put forward a technology of green portland cement clinker calcinated from ferrochrome slag.In the experiment,physical chemical changes of cement clinker in the burning process of ferrochrome slag were investigated.The effects of calcinating temperature and clinker cooling rate on the solubility value of Cr6+were analyzed.The results indicated that when the calcinating temperature is above 1450℃,and the cooling rate is beyond 120℃/min,Cr6+in cement clinker is almost insoluble. 展开更多
关键词 ferrochrome slag Cr6+ green cement clinker
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STUDY ON STRENGTH AND PETROGRAPHIC STRUCTURE OF CLINKER BY LOW-TEMPERATURE BURNING 认领 引用 被引量：1
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作者 Guo Juncai 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 1995年第3期29-36,共8页
In this paper,the strength and petrographic structure of clinker by low-temperature burning are studied.The results show that both the calcining temperature of Ca-CO3 and sintering temperature clinker decreases by 150... In this paper,the strength and petrographic structure of clinker by low-temperature burning are studied.The results show that both the calcining temperature of Ca-CO3 and sintering temperature clinker decreases by 150 degrees C compared with those in traditional rotary kiln,the rate of f-CaO in the clinker sintered at 1300 degrees C is 0.29%similar to 2.81%,the strength of the clinker is 62.5MPa with maximum 69.4MPa at a specific area of 2900 similar to 3400cm(2)/g.The results also show that the types of petrographic structure of the clinker can be classified as:homogeneous structure,inlaid or edged structure,stain-melting structure and porous structure.The clinker sintered at 1300+/-15 degrees C temperature and with enough retention period is mainly in homogeneous structure. 展开更多
关键词 low-temperature sintering clinker strength petrographic structure of clinker
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