Quantification blow-in method for blast furnace

Abstract

A quantification blow-in method for a blast furnace belongs to the technical field of blast furnace iron making. The blow-in process is divided into three phases, namely, a phase of forming a cohesive zone, a phase of taping adaptation, and a phase of mine batch and heavier load. Control standards for the phases and parameters of the blow-in process of the blast furnace are quantified, therefore,important jobs and quantification principles of the respective phase in the blow-in process can be defined. With a wind-adding curve as a core and in combination with actual conditions of blast furnace blow-in, the quantification blow-in technology details the parameters of the blow-in process; in addition, the practice of the technology in the blast furnace also shows that main parameters in theactual blow-in process conforms to the plan, and the blow-in process is smooth and high efficient, which lays the foundation for the quick improvement of economic technological indexes after the blow-in.

Description

technical field [0001] The invention belongs to the technical field of blast furnace ironmaking, and in particular relates to a quantitative opening method of a blast furnace. Background technique [0002] Shougang’s No. 1 and No. 3 blast furnaces were opened in August 1994 and June 1993 respectively. As of July 2009, the blast furnaces have been 15 years old and 16 years old respectively, far exceeding the designed service life. The blast furnaces produce iron per unit volume The volumes reached 12,126 tons and 12,826 tons respectively, close to the international advanced level. With the increase of the age of the two blast furnaces, the cooling staves of the furnace body were damaged to varying degrees, especially the furnace waist and lower cooling stave of the No. 3 blast furnace were severely damaged. In order to slow down the damage to the cooling wall of the furnace body, the two blast furnaces are regularly sprayed for lining. There are many problems such as large ...

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Problems solved by technology

In order to slow down the damage to the cooling wall of the furnace body, the two blast furnaces are regularly sprayed for lining. Large changes in operating parameters, different lengths of furnace start-up, slow improvement of economic and technical indicators after furnace start-up, etc.

[0003] With the development of blast furnace longevity technology, there are more and more old blast furnaces at home and abroad. These blast furnaces generally face the same problem. The randomness of the furnace opening process leads to waste of resources and damage to the longevity of blast furnaces. Furnace experience and technology are difficult to systematize and share

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