公开(公告)号：WO2015146114A8

公开(公告)日：2016-08-18

申请号：PCT/JP2015001596

申请日：2015-03-20

申请人： JFE STEEL CORP

发明人： ICHIKAWA KAZUHIRA ,  HIROSAWA TOSHIYUKI ,  WATAKABE SHIRO

IPC分类号： C21B5/00 ,  C21B7/20

CPC分类号： C21B5/008 ,  C21B5/006 ,  C21B7/20 ,  C21B2300/04

摘要： A method for charging a blast furnace raw material of an ore material and coke into a blast furnace using a rotating chute, wherein the blast furnace raw material is charged into the blast furnace as a coke layer and an ore layer, without mixing the coke being charged into the blast furnace with an ore material, or is charged into the blast furnace as a coke layer and a mixed layer of coke and an ore material formed by mixing a portion of the coke being charged into the blast furnace with an ore material. By appropriately controlling the ratio of the minimum layer thickness of the coke layer and the arithmetic average particle diameter of the coke in the blast furnace belly section when one charge of the coke layer charged into the blast furnace reaches the belly section of the furnace, and by controlling the average layer thickness of the coke layer in the furnace belly section so as to be no greater than 190 mm, it is possible to simultaneously achieve stable blast furnace operation and improved reduction efficiency due to thinning of the ore layer.

摘要翻译： 一种利用旋转滑槽将矿石和焦炭的高炉原料装入高炉的方法，其中将高炉原料作为焦炭层和矿石层加入到高炉中，而不将焦炭混合 以矿石材料装入高炉中，或者作为焦炭层加入高炉中，并将通过混合被加入到高炉中的焦炭的一部分与矿石材料混合而形成的焦炭和矿石材料的混合层。 通过适当地控制加入高炉的焦炭层的一次充电到达炉的腹部的高炉腹部的焦炭层的最小层厚度的比例和算术平均粒径，以及 通过将炉腹部的焦炭层的平均层厚度控制为不大于190mm，由于矿石层变薄，能够同时实现稳定的高炉操作和提高的还原效率。