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Preparation and properties of silane coupling agent modified steel slag as functional filler for anti-corrosion coating

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Journal of Iron and steel Research International 2023年第4期30卷 708-716页

作者： Wei-cheng Zheng Wei-cheng Xu Hao Zhang Hao-xuan Zheng Lin Wang Zheng-ming Cheng Yan-fei Ye Jun Lin Hong-ming Long School of Metallurgical Engineering Anhui University of TechnologyMa’anshan 243032AnhuiChina Key Laboratory of Metallurgical Emission Reduction and Resources Recycling(Anhui University of Technology) Ministry of EducationMa’anshan 243002AnhuiChina School of Civil Engineering and Architecture Anhui University of TechnologyMa’anshan 243032AnhuiChina Department of Chemical and Biochemical Engineering Western UniversityLondonON N6A 3K7Canada Shanghai Baosteel New Building Materials Technology Co. Ltd.Shanghai 201900China Shougang Jingtang United Iron&steel Co. Ltd.Tangshan 063200HebeiChina Zhanjiang Baosteel New Building Materials Technology Co. Ltd.Zhenjiang 524047GuangdongChina Guilin Hongcheng Mining Equipment Manufacture Co. Ltd.Guilin 541000GuangxiChina

The chemical composition and high wear resistance of steel slag(SS)make it a potential alternative to traditional inorganic fillers.3-Aminopropyltriethoxysilane(KH550)modified steel slag(MSS)was successfully prepared,and its application in epoxy(EP)anti-corrosion coating was *** to the grafting of silane coupling agent functional groups onto the surface of SS,MSS exhibited improved solubility in xylene organic solvent and reduced *** the MSS content was 15 wt.%,the contact angle of the MSS/EP composite coating was 101°,and the abrasion was only 0.07 g,compared with 56.2°and 0.13 g,respectively,for the pure EP *** corrosion resistance of coatings was investigated by performing the electrochemical test(impedance)after immersion in a 3.5 wt.%NaCl *** electrochemical test results showed that the impedance modulus of the 15 wt.%MSS/EP composite coating at low frequency(Z_(f)=0.01 Hz)was approximately 1.08×10^(7)Ωcm^(2),which was two orders of magnitude higher than that of the pure EP coating.

关键词： steel slag Silane coupling agent Modification Epoxy coating Inorganic filler

Workability and Strength of Ceramsite Self-Compacting Concrete with steel slag Sand

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Journal of Renewable Materials 2023年第2期11卷 881-904页

作者： Suiwei Pan Anqi Ren Yongli Peng Min Wu Wanguo Dong Chunlin Liu Depeng Chen School of Construction Engineering Ma’anshan UniversityMa’anshan243100China School of Architectural and Civil Engineering Anhui University of TechnologyMa’anshan243032China School of Management Science and Engineering Anhui University of TechnologyMa’anshan243032China

This study focuses on the workability and compressive strength of ceramsite self-compacting concrete with fine aggregate partially substituted by steel slag sand(CSLSCC)to prevent the pollution of steel slag in the *** SF,J-ring,visual stability index,and sieve analysis tests are primarily employed in this research to investigate the workability of freshly mixed self-compacting concrete containing steel slag at various steel slag sand replacement *** experiment results indicate that CSLSCC with the 20%volume percentage of steel slag(VPS)performs better workability,higher strength,and higher specific *** 7-day compressive strength of CSLSCC with the 0.4 of the water-binder ratio(W/B),decreases with the increase of steel slag content,while the 28-day compressive strength increases *** ceramsite self-compacting concrete with good comprehensive performance can be obtained when the substitution rate of steel slag sand for fine aggregate is less than 20%(volume percentage).

关键词： steel slag ceramsite self-compacting concrete workability compressive strength

High-temperature modification and air-quenching granulation of steel slag

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Journal of Iron and steel Research International 2022年第5期29卷 783-792页

作者： Hui Wang Chao Liu Hong-wei Xing Jin-hu Wu Wen-long Lin Shuo Li Guo-hui Ding Yu-zhu Zhang College of Metallurgy and Energy North China University of Science and TechnologyTangshan063200HebeiChina steelmaking Operation Department Shougang Jingtang United Iron&Steel Co.Ltd.Tangshan063200HebeiChina

To solve the problem of difficult utilization of steel slag,the liquid steel slag was modified and the air-quenching granulation process was carried out to make steel slag into a value-added end product:air-quenching granulated steel *** granulated slag was tested to analyze the variation rule of slag properties under different modification *** on the phase diagram of CaO–Si_(2)O–FeO–MgO–Al2O3 slag system,the feasibility of blast furnace(BF)slag as modifier was *** the addition of BF slag was increased from 0%to 35%,following results were *** slag fluidity was improved,and the air-quenching temperature range was ***,the yield of air-quenched steel slag increased,while the granulation rate,the degree of sphericity,the compactness were ***,the air-quenching granulation process could substantially improve the stability and the amorphous content of steel *** maximum removal rate of free CaO was above 80%and the amorphous content was up to 95%.Taking the factors of yield and properties of granulated steel slag into full consideration,the optimum proportion of BF slag is around 15%.

关键词： steel slag Modification Air-quenching granulation Free CaO Amorphous Property

Mechanical properties and durability of alkali-activated steel slag-blastfurnace slag cement

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Journal of Iron and steel Research International 2023年第7期30卷 1342-1355页

作者： Jing-xiong Zhong Li-ying Cao Mei Li Shu-ping Wang Fang Liu Xue-wei Lv Xiao-qin Peng College of Materials Science and Engineering Chongqing UniversityChongqing 400045China Shanghai Baosteel New Building Materials Technology Co. Ltd.Shanghai 200940China Zhoushan Putuo District Housing and Urban Rural Development Bureau Zhoushan 316199ZhejiangChina

Alkali-activated cement(AAC)is either clinker-less or free,and it is also environmentally friendly due to its low carbon footprint and wide range *** wastes,like steel slag and blastfurnace slag,usually have latent hydraulic reactivity,and can be used as precursors of *** clinkerless and clinker-free AAC were prepared from the mixture of steel slag and blastfurnace slag by using water glass as an activator,and four different recipes which satisfied the strength requirement of 42.5R Portland cement were *** recipe of AAC exhibited better resistance to sulfate attack and frost attack than Portland *** showed huge drying shrinkage,but it was equivalent to that of Portland cement as steel slag content increased to 40%.The AAC also had quite low risk of alkali-aggregate *** analysis showed that the major products were calcium silicate hydrate(C–S–H),calcium aluminosilicate hydrate(C–A–S–H)and zeolite-like *** was also detected in the binder when gypsum was contained in the precursors.

关键词： Alkali-activated cement steel slag Blastfurnace slag Durability Mechanical property

Research on the Low-carbon Cementitious Materials:Effect of Triisopropanolamine on the Hydration of Phosphorous slag and steel slag

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Journal of Wuhan University of Technology(Materials Science) 2023年第6期38卷 1348-1359页

作者： ZHANG Ting MA Baoguo XIA Yu State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China School of Surveying&Testing Shaanxi Railway InstituteWeinan 714000China

Cement,phosphorous slag(PS),and steel slag(SS)were used to prepare low-carbon cementitious materials,and triisopropanolamine(TIPA)was used to improve the mechanical properties by controlling the hydration *** experimental results show that,by using 0.06%TIPA,the compressive strength of cement containing 60%PS or 60%SS could be enhanced by 12%or 18%at 28 *** presence of TIPA significantly affected the hydration process of PS and SS in *** the early stage,TIPA accelerated the dissolution of Al in PS,and the formation of carboaluminate hydrate was facilitated,which could induce the hydration;TIPA promoted the dissolution of Fe in SS,and the formation of Fe-monocarbonate,which was precipitated on the surface of SS,resulting in the postponement of hydration,especially for the high SS *** the later stage,under the continuous solubilization effect of TIPA,the hydration of PS and SS could refine the pore *** was noted that compared with portland cement,the carbon emissions of cement-PS-TIPA and cement-SS-TIPA was reduced by 52%and 49%,respectively.

关键词： phosphorous slag steel slag high content trisopropanolamine hydration process lowcarbon emissions

Preparation and properties of flame-retardant rubber composites based on steel slag filler

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Journal of Iron and steel Research International 2023年第7期30卷 1334-1341页

作者： Wei-cheng Xu Wei-cheng Zheng Ling Zhao Hao-tian Wu Yu-xi Wu Hai-li Li Hao Zhang Hong-ming Long Key Laboratory of Metallurgical Emission Reduction and Comprehensive Utilization of Resources Ministry of EducationAnhui University of TechnologyMa’anshan 243002AnhuiChina School of Metallurgical Engineering Anhui University of TechnologyMa’anshan 243032AnhuiChina School of Civil Engineering Anhui University of TechnologyMa’anshan 243032AnhuiChina

Ultrafine steel slag powder(shield powder)was prepared by grinding ordinary steel slag with a functional *** a substitute for aluminum hydroxide,the shield powder was combined with rubber to prepare flame-retardant *** tests showed that the incorporation of shield powder enhances the crosslinkage of the composite and speeds up the curing *** gaseous products formed in the pyrolysis process are mainly *** and combustion tests revealed that the introduction of shield powder improves flame-retardant performance without sacrificing mechanical ***,the optimum substitution ratio of shield powder for aluminum hydroxide is 50.0%.In this case,the composite has the highest degree of graphitization and exhibits excellent flame-retardant performance.

关键词： steel slag Rubber Surface modification Solid waste utilization Flame-retardant composite

Reactions of Chromium during the Calcination of Cement Clinker Produced Using steel slag

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Journal of Wuhan University of Technology(Materials Science) 2023年第4期38卷 834-841页

作者：何晨海 YAN Bo LI Fuzhou School of Materials Science and Engineering Wuhan University of TechnologyWuhan430070China Wuhan Rungong Technology Company Limited Wuhan430070China

We investigated the effects of calcination temperature(950-1450℃),steel slag content,and the total chromium content of steel slag on the Cr^(6+)contents of clinker samples produced using steel slags with different chromium ***,the reactions of chromium in clinker(produced using steel slag)during calcination were *** is found that Cr^(6+)conversion increases with increasing calcination temperature to 1250℃,reaching a maximum of 43%-79%,before decreasing to 18%-42%at 1450℃.Cr^(6+)is mainly formed by the oxidation of trivalent chromium(Cr^(3+))during the solid-phase reaction stage of clinker ***,the Cr^(6+)content of a clinker sample is proportional to the chromium content of its raw meal precursor and is mainly in the form of water-insoluble calcium chromate(CaCrO_(4)).The chromium in clinker is mainly distributed in tricalcium aluminate and tetracalcium aluminoferrite,however,some is present in silicate *** expect to inform the monitoring and control of the Cr^(6+)content of clinker(produced using steel slag)and resulting cement.

关键词： chromium cement clinker steel slag hexavalent chromium reaction characteristics

Cementing properties of steel slag activated by sodium silicates and sodium hydroxide

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Journal of University of Science and Technology Beijing 2005年第5期12卷 464-468页

作者： Wen Ni En Wang Jianping Li Han Sun Civil and Environmental Engineering School University of Science and Technology Beijing Beijing 100083 China

steel slag which is mainly composed of γ-Ca2SiO4 and other silicates or alumino-silicates is activated by sodium sificates and sodium hydroxide. The powders of such steel slag are usually inert to hydrate and subsequently have very low ability of cementing. But when sodium silicates and sodium hydroxide are used as activators the steel slag shows very good properties of cementing. When activated with NaOH solution the hardened slurry of the steel slag has a compressive strength of 11.13 MPa after being cured for 28 days. When activated with Na2SiO3 solution the samples after being cured for 28 days have an average compres- sive strength of 40.23 MPa. While the steel slag slurry which is only mixed with water has a compressive of 0.88 MPa after being cured for 28 days.

关键词： steel slag sodium silicate sodium hydroxide cement binding material

Thermodynamic analysis and formula optimization of steel slag-based ceramic materials by FACTsage software

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International Journal of Minerals,Metallurgy and Materials 2013年第4期20卷 379-385页

作者： Xian-bin Ai Hao Bai Li-hua Zhao Da-qiang Cang Qi Tang State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Foshan Oceano Ceramic Co. Ltd.

Using steel slag as a main raw material of ceramics is considered as a high value-added way. However, the relationship among the initial composition, ceramic microstructure, and macroscopic properties requires further study. In this paper, a series of ceramics with different slag ratios （0-70wt%） were designed, and the software FACTsage was introduced to simulate the formation of crystalline phases. The simulation results indicate that mullite is generated but drastically reduced at the slag ratios of 0-25wt%, and anorthite is the dominant crystalline phase in the slag content of 25wt%-45wt%. When the slag ratio is above 45wt%, pyroxene is generated more than anorthite. This is because increasing magnesium can promote the formation of pyroxene. Then, the formula with a slag content of 40wt% was selected and optimized. X-ray diffraction results were good consistent with the simulation results. Finally, the water absorption and bending strength of optimized samples were measured.

关键词： ceramic materials steel slag phase composition thermodynamics optimization