A kind of blast furnace coke preparation method

Abstract

The invention discloses a coke distributing method of a blast furnace. Blast furnace coke is divided into a plurality of groups, and is composed of large coke blocks and medium coke blocks. Each group of coke is composed of the large coke blocks or combination of the medium coke blocks and the large coke blocks, and the large coke blocks are distributed in the center of the blast furnace. Center airflow and edge airflow are considered in the coke distributing method. A large number of large coke blocks are distributed in the center of the blast furnace creatively through the difference of the requirements of different positions of the blast furnace for the particle size of the coke, and the function of improving the center airflow is achieved. In addition, a large number of medium coke blocks are distributed on the edge of the blast furnace, and the function of improving chemical reaction conditions in the blast furnace is achieved. In addition, a small number of large coke blocks are distributed on the edge of the blast furnace, and the function of improving the edge airflow can be achieved on the upper portion of the blast furnace. When the large coke blocks on the edge of the blast furnace enter a furnace cylinder on the lower portion of the blast furnace, the function of improving the ventilation and liquid permeability of the furnace cylinder of the blast furnace is achieved.

Description

technical field [0001] The invention relates to a coke distribution method for a blast furnace. Background technique [0002] Since the fuel quality requirements of large blast furnaces are far greater than those of small blast furnaces, a large number of large cokes are given priority to be used by large blast furnaces. In this way, how to ensure the stability of the upper airflow of the blast furnace and the activity of the lower hearth is the key to the limited bulk coke. A difficult problem facing the 1800m³ blast furnace. If there is no good upper air flow and no active hearth, all economic and technical indicators of the blast furnace will be out of the question. [0003] There are two traditional methods of coke distribution. The first method is to distribute all the large coke cloths in a batch of coke in the center of the blast furnace, and other parts to distribute coke in the middle; the second method is to use whole coke according to the proportion of coke. The...

AI Technical Summary

Problems solved by technology

[0003] There are two traditional methods of coke distribution. The first method is to distribute all the large coke cloths in a batch of coke in the center of the blast furnace, and other parts to distribute coke in the middle; the second method is to use whole coke according to the proportion of coke. The batch is all large coke or the whole batch is all medium coke (for example, according to the ratio of 60% medium coke + 40% large coke in the 1800 blast furnace, the coke can be divided into 5 batches as a cycle, of which 3 batches are all medium coke, and two batches of large coke for distribution), however, both methods are not very reasonable for blast furnace smelting

The first method only considers the importance of central airflow, but ignores the edge airflow

The second method is to improve the edge airflow but ignore the center airflow and when the edge medium coke reaches the hearth, this part of the medium coke will become smaller, which will seriously affect the activity of the blast furnace hearth