Measurement of erosion state and refractory lining thickness of blast furnace hearth by using three-dimensional laser scanning method

Lei Zhang, Jianliang Zhang, K. Jiao, Jia Guoli, Jiangjiang Gong, Yang Xiaoting, Zhao Manxiang, Du Weibin
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引用次数: 9

Abstract

The three-dimensional (3D) model of erosion state of blast furnace (BF) hearth was obtained by using 3D laser scanning method. The thickness of refractory lining can be measured anywhere and the erosion curves were extracted both in the circumferential and height directions to analyze the erosion characteristics. The results show that the most eroded positions located below 20# tuyere with an elevation of 7700 mm and below 24#–25# tuyere with an elevation of 8100 mm, the residual thickness here is only 295 mm. In the circumferential directions, the serious eroded areas located between every two tapholes while the taphole areas were protected well by the bonding material. In the height directions, the severe erosion areas located between the elevation of 7600 mm to 8200 mm. According to the calculation, the minimum depth to ensure the deadman floats in the hearth is 2581 mm, corresponding to the elevation of 7619 mm. It can be considered that during the blast furnace production process, the deadman has been sinking to the bottom of BF hearth and the erosion areas gradually formed at the root of deadman.
用三维激光扫描法测量高炉炉底腐蚀状态和耐火衬厚度
采用三维激光扫描方法,建立了高炉炉底侵蚀状态的三维模型。可在任意位置测量耐火衬里的厚度,提取其周向和高度方向的侵蚀曲线,分析其侵蚀特性。结果表明:20#风口以下(海拔7700 mm)和24# ~ 25#风口以下(海拔8100 mm)侵蚀最严重,残余厚度仅为295 mm;在周向上,每两个口口之间都有严重的侵蚀区,而口口区域受到粘结材料的良好保护。在高度方向上,严重侵蚀区位于海拔7600 ~ 8200 mm之间。根据计算,保证死人浮在炉缸内的最小深度为2581 mm,对应的标高为7619 mm。可以认为,在高炉生产过程中,炉膛一直向炉底下沉,炉膛根部逐渐形成侵蚀区。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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