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International Journal of Minerals,Metallurgy and Materials 2016年第5期23卷 595-600页

作者： Huan Shi Ke-qin Feng Hai-bo Wang Chang-hong Chen Hong-ling Zhou School of Manufacturing Science and Engineering Sichuan University Chengdu 610065 China School of Materials Engineering Panzhihua College Panzhihua 617000 China

To effectively reuse high-titanium blast furnace slag （TS）, foam glass-ceramics were successfully prepared by powder sintering at 1000℃. TS and waste glass were used as the main raw materials, aluminium nitride （AIN） as the foaming agent, and borax as the fluxing agent. The influence of the amount of A1N added （lwt%-5wt%） on the crystalline phases, microstructure, and properties of the produced foam glass-ceramics was studied. The results showed that the main crystal phases were perovskite, diopside, and augite. With increasing A1N content, a transformation from diopside to augite occurred and the crystallinity of the pyroxene phases slightly decreased. Initially, the aver- age pore size and porosity of the foam glass-ceramics increased and subsequently decreased; similarly, their bulk density and compressive strength decreased and subsequently increased. The optimal properties were obtained when the foam glass-ceramics were prepared by adding 4wt% AIN.

关键词： blast furnace slag aluminium nitride powder sintering foam glass-ceramics crystallization

Influence of CeO_2 addition on the preparation of foamed glass-ceramics from high-titanium blast furnace slag

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International Journal of Minerals,Metallurgy and Materials 2018年第6期25卷 689-695页

作者： Hong-ling Zhou Ke-qin Feng Chang-hong Chen Zi-di Yan School of Manufacturing Science and Engineering Sichuan University

Foamed glass-ceramics doped with cerium oxide（CeO_2）were successfully prepared from high-titanium blast furnace slag by one-step *** influence of CeO_2 addition（1.5wt%–3.5wt%）on the crystalline phases,microstructure,and properties of foamed glass-ceramics was *** show that CeO_2 improves the stability of the glass phase and changes the two-dimensional crystallization mechanism into three-dimensional *** analysis indicates the presence of Ca（Mg,Fe）Si_2O_6 and Ca（Ti,Mg,Al）（Si,Al）_2O_（6 ）in all sintered *** with CeO_2,Ti CeO_4 precipitates,and crystallinity increases,leading to increased thickness of pore walls and uniform *** comprehensive properties of foamed glass-ceramics are better than that of samples without CeO_*** particular,the sample added with a suitable amount of CeO_2（2.5wt%）exhibits bulk density that is similar to and compressive strength（14.9 MPa）that is more than twice of foamed glass-ceramics without CeO_2.

关键词： foamed glass-ceramics cerium oxide blast furnace slag sintering crystallization

Preparation of high acidity coefficient slag wool fiber with blast furnace slag and modifying agents

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Journal of Iron and Steel Research International 2023年第7期30卷 1440-1450页

作者： Wen-chao He Ming-shuai Luo Yin Deng Yue-lin Qin Shuo Zhang Xue-wei Lv Yong Zhao Cheng-zhe Jiang Zheng-de Pang School of Metallurgy and Materials Engineering Chongqing University of Science and TechnologyChongqing 400044China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Environmental Resources Technology Co. Ltd.Baowu GroupShanghai 201999China

Preparation of high acidity coefficient slag wool fiber with molten slag and modifying agents is considered to be a positive approach for value-added utilization of blast furnace slag. In order to achieve the multi-purposes of fiber-forming, energy saving, and waste heat recovery, the modifying agents that can improve the acidity coefficient of slag effectively, economically, and environmentally were investigated. Three agents with different acidity coefficients were adopted to modify slag and manufacture wool fibers. The effect of agent and slag proportion on the melting temperature and viscosity of molten slag was studied at a fixed acidity coefficient of 1.8 and 2.0. The results indicate that the sample modified with high acidity coefficient agent and high slag proportion has lower melting temperature and viscosity. The effect of agent and slag temperature on the fiber diameter was also investigated when the acidity coefficient of slag is 2.0. At a fixed slag proportion of 50 wt.%, the mean diameter decreases with increasing temperature and decreasing viscosity coefficient. Besides, the temperature drops caused by the addition of agents and energy consumption of samples for heating the slag were also analyzed.

关键词： blast furnace slag slag wool fiber High acidity coefficient Modifying agent slag proportion

Process and property optimization of ceramsite preparation by Bayan Obo tailings and blast furnace slag

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Journal of Iron and Steel Research International 2023年第7期30卷 1381-1389页

作者： Yi-fan Chai Wen-xian Hu Yun-hao Zhang Yi-ci Wang Jun Peng Sheng-li An School of Materials and Metallurgy Inner Mongolia University of Science and TechnologyBaotou 014010Inner MongoliaChina Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices Baotou 014010Inner MongoliaChina

The ceramsite was prepared by using Bayan Obo tailings and blast furnace slag of Baotou Steel as the main raw materials and coal gangue as pore-forming agent,and the process system and the performance of ceramsite were *** phase transformation rules of the ceramsite prepared by multi-source solid waste in sintering method were *** influence of sintering process parameters on ceramsite performance and the purification effect of ceramsite on ammonia nitrogen wastewater were *** results show that the reasonable proportion of raw materials for preparing ceramsite is 60%tailings,35%blast furnace slag and 5%coal *** reasonable preparation process of ceramsite is preheating at 350℃ for 12 min,increasing the temperature to 750℃ and holding for 60 min,then increasing the temperature to 1130℃ and roasting for 20 *** cooling method is to cool down with the *** prepared ceramsite has compressive strength of 1.89 MPa,porosity of 51.31%,water absorption of 31.42%,and bulk density of 1.94 g/cm^(3).When the ceramsite is used to treat ammonia nitrogen wastewater,the removal rate of ammonia nitrogen is 47.33%.

关键词： Bayan Obo tailing blast furnace slag Ceramsite Solid waste Comprehensive utilization

Effect of TiO_(2) and BaO on viscosity and potassium removal capacity of blast furnace slag

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Journal of Iron and Steel Research International 2024年第11期31卷 2675-2683页

作者： Jian-tao Ju Xin-yi Li Liu-le Wei Xiang-dong Xing School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055ShaanxiChina Research Center of Metallurgical Engineering and Technology of Xi’an University of Architecture and Technology Xi’an710055ShaanxiChina

In order to increase the utilization rate of vanadium–titanium magnetite in blast furnace smelting,the viscosity and potassium removal capacity of CaO–SiO_(2)–Al_(2)O_(3)–MgO–BaO–TiO_(2) slag(CaO/SiO_(2)=1.05,1–5 wt.%BaO,2–20 wt.%TiO_(2))were studied for slag optimization using the cylinder method and slag–metal equilibrium technique,***,the structural properties of the slag were characterized by Fourier transform infrared *** concept of“a ring structure of Ti–O–Si”was proposed to express the change in the viscosity of the blast furnace *** results showed that the viscosity of slag increased with the increase in BaO content while the potassium removal capacity ***,an increase in TiO_(2) content from 2 to 20 wt.%resulted in a decrease in viscosity and an increase in potassium removal *** Fourier transform infrared spectroscopy results showed that the charge compensation of Ba2+can form complex aluminosilicate structure and increase the viscosity of ***,with the increase in TiO_(2) content,Ti4+ions replace Si4+in the silicon-oxygen tetrahedral structure,thereby reducing the degree of polymerization of the silicate network and decreasing the viscosity.

关键词： blast furnace slag Viscosity Structure Potassium removal capacity BaO TiO_(2)

Effect of w(MgO)/w(Al_(2)O_(3)) ratio and basicity on microstructure and metallurgical properties of blast furnace slag

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Journal of Iron and Steel Research International 2021年第10期28卷 1223-1232页

作者： Wei-guo Kong Ji-hui Liu Yao-wei Yu Xin-mei Hou Zhi-jun He School of Materials and Metallurgy University of Science and Technology LiaoningAnshan114051LiaoningChina State Key Laboratory of Advanced Special Steel Shanghai Key Laboratory of Advanced FerrometallurgySchool of Materials Science and EngineeringShanghai UniversityShanghai200444China

The CaO–SiO_(2)–Al_(2)O_(3)–MgO system is the main component unit in the slag formation process in blast furnace *** structural changes directly affect the high-temperature metallurgical properties of *** dynamics simulations were thus conducted to analyze the microstructure changes of the quaternary slag system under different basicities and w(MgO)/w(Al_(2)O_(3))*** changes in w(MgO)/w(Al_(2)O_(3))ratio and basicity could affect the stability of each *** the basicity and w(MgO)/w(Al_(2)O_(3))ratio,the average coordination number of O surrounding Si atom only changed a little and remained approximately 4,indicating that Si exists as a stable structure of the[SiO4]4−tetrahedron in the slag structure,while the average coordination number of O surrounding Al atom changed greatly from 4 to 6,which indicated that the Al existence form could be transformed from[AlO_(4)]^(5−) tetrahedron to[AlO_(5)]^(7−) pentahedron and[AlO_(6)]^(9−) ***,the diffusion rate of ions was accelerated with the increase in w(MgO)/w(Al_(2)O_(3))ratio and ***,the self-diffusion coefficients of each ion were obtained,and the magnitudes were observed to be in the following order:Mg^(2+)>Ca^(2+)>Al^(3+)>Si^(4+).The calculation and analysis of the slag viscosity and activation energy of viscous flow under different basicities and w(MgO)/w(Al_(2)O_(3))ratios revealed that the metallurgical properties of slag at high temperature depend on the flow-unit diffusivity and the microstructure stability,simultaneously,the basicity should be controlled between 1.0 and 1.2,and the w(MgO)/w(Al_(2)O_(3))ratio could be controlled between 0.45 and 0.55.

关键词： blast furnace slag Microstructure Basicity w(MgO)/w(Al_(2)O_(3))ratio Molecular dynamics

Synthesis,Characterization of NaA Zeolite from blast furnace slag(BFS)via Alkaline Fusion and Hydrothermal Treatment

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Journal of Wuhan University of Technology(Materials Science) 2023年第2期38卷 401-407页

作者： LI Changxin LI Xiaoya LI Chaoyang LI Li College of Chemical Engineering and Pharmacy Jingchu University of TechnologyJingmen448000China College of Safety Science and Engineering Nanjing Tech UniversityNanjing211816China

A blast furnace slag zeolite(BFSZ)material was successfully synthesized from BFS by alkaline fusion and hydrothermal *** the analyses of XRD,FT-IR,FE-SEM,XRF,CEC and BET surface area measurement,when zeolite was synthesized at a crystallization temperature of 100℃with initial Si/Al ratio of 1:1,the main composition in the product is Na-A *** the above conditions,the BFSZ was synthesized with CEC of 3.06 meq/g and maximum BET surface area of 37.55 m^(2)·g^(-1).Moreover,the incorporating of BFS-derived minor metals(such as Mg,Fe,and Ca)are found to be of little importance for the synthesis of *** the obtained BFSZ material has a great adsorption performance for removing Mn^(2+),Cu^(2+),and NH_(4)^(+)ions diluted in water,owing to the higher CEC.

关键词： blast furnace slag conversion zeolite characterization adsorption

A Blended Cement Containing blast furnace slag and Phosphorous slag

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Journal of Wuhan University of Technology(Materials Science) 2002年第2期17卷 62-65页

作者：李东旭 College of Materials Nanjing University of Technology Nanjing China

Blended cement containing blast furnace slag (BFS) and phosphorous slag( PS) is a new kind of cement. The total content of blended materials could increase if two additives were used. Using the same admixtures , the properties of the blended cement with 70% additives could reach the standard of 525-grade slag cement according to GB. The strength of cement with 80% additives could reach the standard of 425-grade slag cement. The tests of strength, pore structure, hydration products, inhibiting alkali-aggregate reaction, resistance to sulfate corrosion of BFS-PSC were performed.

关键词： blended cement blast furnace slag phosphorous slag admixtures alkali-aggregate reaction sulfate corrosion

Quantitative Analysis of Non-Crystalline and Crystalline Solids in blast furnace slag

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Journal of Iron and Steel Research International 2011年第1期18卷 8-10页

作者： WANG Hai feng ZHANG Chun-xia QI Yuan hong State Key l.aboratory ot Advanced Steel Processes and Products Central Iron and Steel Research Institute Beijing 100081 China

The granulation of blast furnace slag （BFS） with water quenching treatment has some disadvantages, such as high water consumption and difficulty for recovery heat. So developing a new dry granulation technique to treat BFS is very important. The applicability of BFS directly depends on the content of non-crystalline solids in the slag after treatment. So it is of theoretical and practical significance to analyze the content of non-crystalline solids in the slag quantitatively and simply. Metallographical test is mainly adopted to quantify the non-crystalline in BFS so far with the shortages such as complex sample, difficult determination, ect. The diffraction intensity of non-crystalline is proportionate to the content of non-crystalline in BFS, ~ray diffraction method was adopted to quantify the noncrystalline and the crystalline solids in BFS. The quantitative coefficient between the crystalline and the non-crystalline solids of BFS is 0.70 of BFS whose main composition （mass percent, %） is： CaO 38.2, SiO2 35.7, Al2Oa 16.3, and MgO 8.3. The relative error of X-ray diffractometer for quantitatively analyzing non-crystalline content of BFS is less than 1%.

关键词： blast furnace slag non crystalline crystalline quantitative analysis

Efficient Use of Steel slag in Alkali-Activated blast furnace slag Based Geopolymer

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Journal of Renewable Materials 2023年第7期11卷 3129-3141页

作者： Yu Bai Lei Wang Ying Fang College of Materials Science and Engineering Nanjing Tech UniversityNanjing211816China

Energy shortage and the emission of greenhouse gases have become a global problem of urgent ***,there is an urgent need to develop a low carbon building *** have become a hot topic due to their environmental sustainability and the feasibility of immobilizing industrial *** this paper,steel slag(SS)fines were investigated as auxiliary materials of blast furnace slag(BFS)based *** hydration heat properties,flowability,compressive strength,sorptivity coefficient,X-ray diffraction(XRD),and scanning electron microscopy(SEM)of the geopolymer pastes were *** results showed that the incorporation of SS weakened the reactivity of the BFS-based geopolymer paste and improved the flow values of the *** compressive strength of the geopolymer with 20%SS content reached 117 MPa at 28 *** geopolymer specimens with high compressive strength showed a low sorptivity *** microscopic results showed that the addition of the appropriate amount of SS reduced the cracks,improved the density of the geopolymer,and produced a geopolymer composite with excellent mechanical properties.

关键词： blast furnace slag steel slag geopolymer alkali-activated