Experimental study on the distribution of multi-size sinter and void fraction in the sinter vertical tank

Abstract

Sinter segregation leading to non-uniform distribution of multi-size sinter and void fraction is a common problem during the operation of the sinter vertical tank. In order to study the segregation of sinter in the vertical tank and the distribution of void fraction when the sinter was not uniformly distributed, a experimental apparatus with a ratio of 1:10 to the field apparatus was established. In this paper, a self-made spacing plate was used to measure the segregation and void fraction distribution more accurately for large, medium, and small grain sizes sinter in vertical tank at three height levels. It was found that the distribution of 15 ∼ 20 mm sinter was more at the corners of the vertical tank, and less under the feeding ducts. And the distribution of 0 ∼ 1.5 mm sinter was opposite to 15 ∼ 20 mm sinter. While 5 ∼ 8 mm sinter was more uniformly distributed. In addition, the void fraction gradually increased with the height of the sinter layer. In the horizontal direction, the largest void fraction was found at the corners of the vertical tank, while the smallest under the feeding ducts. The results of the study help to validate different mathematical models.