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Effect of process parameters on dry centrifugal granulation of molten slag by a rotary disk atomizer

Journal of Iron and Steel Research International 2021年第3期28卷 263-271页

作者： Ri-jin Cheng Hua Zhang Yang Li Qing Fang Bao Wang Hong-wei Ni The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430081HubeiChina Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan430081HubeiChina Technical Center HBIS Group Hansteel CompanyHandan056001HebeiChina

Dry centrifugal granulation(DCG)experiments for blast furnace slag(BFS)were performed by means of a rotary disk atomizer since water quenching method can create a series of *** results showed that the DCG method can granulate the BFS,but the results are easily affected by the slag flow rate,disk rotating speed,disk radius,disk material and slag falling *** granulating parameters with an excessive flow rate,low rotating speed,SiN–SiC disk,stainless steel disk and low slag falling height are detrimental to the granulation *** most suitable parameters for granulation are a slag flow rate of 5.1×10^(−5) m^(3)/s,a disk rotating speed of 1500–2300 r/min,a slag falling height of 0.8 m and a smooth graphitic disk with the radius of 0.1 *** the absence of an off-center flow,the overall best granulating effect produces round particles with mean diameter of 3.43 mm without creating slag *** vitreous content of the BFS particles granulated by graphite disks is 92%,which meets the requirements of cement raw *** Bond work index of dry granulated BFS is 18.4 kWh/t,and the grindability of dry granulated slag and water-quenched slag is similar.

关键词： Blast furnace slag centrifugal granulation Process parameter Disk property Grindability Vitreous content

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Composition-specific granulation characteristics of molten slag at improved throughput and high temperature of 1,723 K

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Energy Storage and Saving 2023年第4期2卷 586-596页

作者： Junjun Wu Yu Tan Yuxiang Fu Hong Wang Xun Zhu Qiang Liao Key Laboratory of Low-grade Energy Utilization Technologies and Systems Chongqing UniversityChongqingChina400044 Institute of Engineering Thermophysics School of Energy and Power EngineeringChongqing UniversityChongqingChina400044 School of Mechanical and Power Engineering Chongqing University of Science&TechnologyChongqingChina400044

centrifugal granulation is one key step to enable waste heat recovery from the molten slag in the iron and steel ***,it remains unknown about the granulation characteristics of molten slag with different chemical compositions,especially at high *** this work,we provided an experimental study on centrifugal granulation with four types of molten *** stage-specific centrifugal granulation was recorded and analyzed at *** effects of atomizer configuration and chemical compositions on granulation were investigated in *** cup-type atomizer favors film-mode disintegration and possesses better anti-adhesion capacity although the final granule size was not strongly affected by the atomizer *** importantly,centrifugal granulation has been demonstrated with appreciable adaptability to composition-specific blast furnace(BF)slag with binary basicity of *** present study not only sheds light on the modest effect of the chemical composition of molten slag on centrifugal granulation characteristics,but also gains credit for the adaptivity of CGATER.

关键词： centrifugal granulation Molten slag Chemical composition Atomizer configuration

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