Blast furnace section ore-coke alternating multi-sector step distributing method, and its furnace top device

Abstract

The invention provides the method of the blast furnace transect mine charred between the phases several fan surface step advancing the cloth and the roof instrument, it belongs to the puddling. Using the methods of loading the mine, the tar synchronously or loading tar firstly, loading the mine afterward, adopting the several room loading the material and the definite angle of loading the tar, loading the mine and the step advancing angle, the material is loaded with the manner of the mine, tar phases several fan surfaces. The mine and the tar is loaded the surface of the throat of the stove with the shape of the mine, the tar several fan surface, the center sequence clean tar pole in the range of the core of the material pole, at the same time, the tar spinning ladder and the mine spinning ladder which glue the center series clean tar pole is formed in the material pole; the mine, the tar are formed the two, the three, the four loading filling frame which is the shape of the spinning ladder in the stove, the changing of the filling frame of the mine and the tar in the stove to solving the problem of the bad ability of the breathe freely when loading the mine and the tar in the shape of the layer and the standoff airflow, so the smelting process of the blast furnace is level off and controllable.

Description

technical field [0001] The invention belongs to ironmaking, and relates to a material distributing method for a blast furnace and a furnace top charging device thereof. Background technique [0002] At present, in the face of blast furnaces with a high degree of intensified smelting and internal factors that are sufficient to destroy the furnace condition and are easily "activated", the traditional method of laying ore and coke in the material column in a layered manner and the material bell, no With the bell-type furnace top charging device, when the ore and coke are distributed in layers, the coke cannot become a continuous phase in the vertical material column, forming a layered furnace material filling structure with alternating layers of coke and ore, which obviously has poor air permeability of the material column And it is easy to cause local airflow problems on the inner circumference of the blast furnace, which directly affects the normal production of the blast fur...

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Problems solved by technology

[0003] The purpose of the present invention is to propose a method for stepping and distributing materials on the cross-section ore coke of a blast furnace and its roof device, which can effectively solve the problems of poor air permeability and local airflow of the blast furnace material column, and implement charging with it. The distribution of ore and coke can be as follows: ①A large and uniform continuous net coke column with large and uniform coke blocks is formed within a narrow range in the center of the blast furnace; The medium coke spiral ladder and the mine spiral ladder are not only close to the central continuous net coke column but also surround it as a charge filling structure that rotates in the same direction. In the vertical material column, coke is used as a "framework" to establish a continuous and followable gas flow channel. , which fundamentally solves the problem of poor air permeability of the material column when the ore and coke are layered. When the strong upward dominant gas flow merges with the small flowing local air flow, the relatively weak local air flow is integrated into the rotating upward dominant gas flow. When the rotating upward dominant gas flow is formed in the furnace It can effectively suppress the occurrence of local air flow that damages the furnace condition and solve the problems of poor air permeability and local air flow of the blast furnace material column, improve the air permeability of the overall material column, and enhance the ability of the blast furnace to resist various interferences from the outside or itself. The smelting process is always in a stable and controlled state, which can promote the improvement of productivity and prolong the life of one generation of blast furnace

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