A NEW TYPE OF BELL-LESS TOP FOR BLAST FURNACES

摘要

This paper describes a new type of bell-less top installed on two lined Mast furnaces at Tianjin Iron Works and another new-built at Echeng Steel Works in China. A compact installation was presented fur existing furnace top innovation with the least reformation of existing top structure. A water cooling and sealing gearbox used for driving the chute discards completely the traditional idea about necessity of continuous supply of cooling gas for the gearbox. A multi-ring spreader and its dozens of selectable charging patterns enables an operator to achieve optimal burden distribution easily under the condition of a minimum investment of control equipment. Some useful conclusions have been made through a small-size model and a full-scale model tests. The excellent characteristics and the superiority of the new top have been fully proved at both works.