Abstract
To comprehensively understand the effectiveness of external factors on flow characteristics and realize particle flow distribution evenly in bulk layers is an essential prerequisite for improving the performance of heat transfer in vertical sinter cooling beds (VSCBs). The numerical discrete element method (DEM) was applied to investigate external geometric and operational factors, such as the aspect ratio, geometry factor, half hopper angle, normalized outlet scale, and discharge velocity. Using the Taguchi method, a statistical analysis of the effect of design factors on response was performed. In this study, we focused more on external factors than granular properties, be remodelling the external factors was more useful and reliable for actual production in industries. The results showed that the most important factor was the aspect ratio, followed by the geometry factor, normalized outlet scale, half hopper angle, and discharge velocity for the dimensionless height of mass flow. In terms of the Froude number, the most influential factor was the normalized outlet scale with a contribution ratio of 33.81%, followed by the aspect ratio (22.86%), geometry factor (17.73%), discharge velocity (17.73%), and half hopper angle (11.83%).
Highlights
The vertical sinter cooling bed (VSCB) is the principal device for cooling red-hot sinter granular compounds from the sintering machine during the production process in the industry
The challenge of engineering problems limiting the performance of heat transfer in VSCB remains unresolved, which includes the external aspect of the serious air pressure loss and inferiority equality of heat resource recovery, prohibiting effective heat transfer between air and sinter granular compounds, and a worse internal aspect of the sinter granular flow pattern
In this(hsection, we mainly focus on the impact of design factors on the dimensionless height mass flow mass) and Froude number (Fr) with the help of the discrete element method (DEM)-Taguchi method for VSCB
Summary
The vertical sinter cooling bed (VSCB) is the principal device for cooling red-hot sinter granular compounds from the sintering machine during the production process in the industry. A considerable number of research papers have been developed in the field of VSCB, mainly focusing on thermodynamics parameters, such as the solid and gas inlet temperature, solid and gas inlet mass flow rate, aspect ratio of VSCB [1,2,3], and gas pressure loss [4,5,6]. Previous research has demonstrated few effects on improving the performance of heat transfer in VSCB. The challenge of engineering problems limiting the performance of heat transfer in VSCB remains unresolved, which includes the external aspect of the serious air pressure loss and inferiority equality of heat resource recovery, prohibiting effective heat transfer between air and sinter granular compounds, and a worse internal aspect of the sinter granular flow pattern. The flow pattern of sinter granular material comprises two distinct flow types, such as the mass flow and funnel flow pattern
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