Experimental Simulation of the Interaction of Slag and Hot Metal with Coke at the Bosh Region of Blast Furnace

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• 作者：M. Eng. Anrin Bhattacharyya ; Johannes Schenk…
• 关键词：Coke ; Bosh slag ; Wetting ; Hot metal ; Blast furnace ; CRI test
• 刊名：BHM Berg- und Hüttenmännische Monatshefte
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：162
• 期：1
• 页码：28-33
• 全文大小：701KB
• 刊物类别：Engineering
• 刊物主题：Mineral Resources;
• 出版者：Springer Vienna
• ISSN：1613-7531
• 卷排序：162

文摘

Coke is the only raw material which remains solid even in the lowest zone of a blast furnace. The bed-permeability in the bosh zone of the blast furnace is maintained by the solid coke structure. The wetting behaviour of slags in the coke bed of the bosh region in a blast furnace plays a very important role in the process by directly influencing the free movement of the burden and furnace gas and thereby affecting the fuel consumption. Cokes of unsuitable quality will lead to lower permeability in the bosh zone and hinder the furnace operation. In this work, various industrial coke samples are treated with slags of different basicities in a drop-shape analysis facility at a high temperature similar to process conditions. The coke samples have been treated under standard CRI (Coke Reactivity Index) test conditions beforehand in order to simulate the process more closely. The results display the variations in wetting behaviour, temperature, and time for different coke and slag combinations as a function of coke properties and slag compositions. The wetting behaviour at the coke/hot metal interface has also been investigated. The results provide a better understanding of the solid-liquid interaction which takes place in the bosh region of the blast furnace.