Method for blowing-in operation of steel-making blast furnace

Abstract

The invention discloses a method for blowing-in operation of a steel-making blast furnace. By adopting the modes of blocking a wind port, loading against the wind, blowing in the semi-charging furnace, mounting an air conduit by segments, controlling the top temperature and pursuing a stock line moderately for blowing in furnace, the method not only can avoid unfavorable influences on the blowing-in operation of the blast furnace caused by equipment accident and human error accident during operation, but also can avoid excessive moisture in the coal gas sticking to a cloth bag or burning the cloth bag caused by overhigh temperature of the coal gas after air bleeding; the method is suitable for blowing in the furnace aiming at a blast furnace system under the complex condition, and particularly aiming at the blast furnace which is not subjected to various debugging or is not well debugged; and the influence of the equipment accident on the furnace condition can be extremely relieved so as to reduce the furnace blowing-in accident to the minimal degree.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, in particular to a method for operating a steelmaking blast furnace. Background technique [0002] With the rapid development of our country's economy, the metallurgical industry, as a pillar industry of the national economy, will rank among the top in the world in terms of speed and level of development. On the basis of many times of furnace start-up practice, a set of safe and effective furnace start-up methods was invented, which provided a strong guarantee for the rapid production and efficiency of the blast furnace. [0003] The blast furnace start-up work is an important system engineering. The quality of the start-up directly affects whether the follow-up production of the blast furnace is smooth or not and the length of the life of the first generation furnace. [0004] In view of the current furnace opening method, several situations often encountered in the furnace open...

AI Technical Summary

Problems solved by technology

[0005] 1. The start-up schedule of the iron-making enterprise has been fixed, but the construction network plan has not been completed on time. As Party B, we can only start the furnace according to the requirements of Party A, but as a newly installed feeding system equipment, there are many failures. The operation is unstable. After the furnace is started, it is easy to occur that the feeding cannot be carried out normally, resulting in the phenomenon of wind reduction or shutdown of the blast furnace, which brings certain difficulties to the normal operation of the furnace.

[0006] 2. The signal of the automatic control system and semi-automatic system under the blast furnace tank is unstable, which may easily cause errors in feeding operations; The upper coke has become ore, resulting in insufficient heat in the hearth, resulting in unsmooth start-up work and follow-up production

[0007] 3. Iron-making enterprises only pay attention to the construction of blast furnaces, and do not pay attention to the follow-up treatment of molten iron. As a result, after the blast furnace is opened, the processing capacity of molten iron is small, and iron often cannot be tapped normally, resulting in unplanned wind reduction and shutdown of the blast furnace. As a result, the blast furnace cannot reach production and efficiency in a short period of time

[0008] 4. Part of the blast furnace had an equipment accident after the furnace was opened, and had to be shut down for treatment