1050 m<3> class blast furnace cold stoking material preparing technology

Abstract

The invention relates to a 1050 m<3> class blast furnace cold stoking material preparing technology. The 1050 m<3> class blast furnace cold stoking material preparing technology includes the followingsteps that A, the volume between a center line and a stock line of a blast furnace air opening is calculated according to a blast furnace design furnace profile; secondly, the ore ratio is controlled; C, in a cold stoking material, components of pig iron include 90%-91% of Fe, 3.5%-4% of Si and 0.6%-0.7% of Mn, the slag yield is 1.0%-1.05%, and the whole furnace coke ratio is 5275 kg/t to 5285 kg/t; and D, the cold stoking material is composed of three sections, wherein the first section is a net coke section, the second section is an empty coke section, and the third section is a light loadsection. Due to reasonable mixing of the cold stoking material, the slag components in the blast furnace cold stoking material are more scientific, the heat of a hearth in the blast furnace blowing-inprocess is sufficient, the slag fluidity is good, and the purpose that 1050 m<3> class blast furnace cold stoking is conducted by 20 days or longer, blowing-in is conducted for 30 hours after cold stoking, and blast furnace full blast smelting is conducted is achieved.

Description

technical field [0001] The invention belongs to the technical field of blast furnace stuffiness, and relates to a process for preparing stuffy materials of a 1050m³ blast furnace. Background technique [0002] Blast furnace stuffy furnace refers to the technology that the blast furnace stops production after the blast furnace is filled with coke and a small amount of flux and ore due to production needs. At present, in the field of blast furnace ironmaking technology, the phenomenon of blast furnace shutting down for a long time due to various influencing factors is more frequent. The blast furnace is stuffy for a long time, and the preparation of the stuffing charge is the most important link, and it is the key to whether the blast furnace can be started safely and quickly after it is shut down. [0003] Blast furnaces are stuffy for a long time, and the preparation of the stuffy charge has become a major difficulty for ironworkers at present, especially when the stuffy fu...

AI Technical Summary

Problems solved by technology

The composition of the furnace material under the existing technical conditions is very easy to cause a large amount of burning of the furnace material during the furnace, the slag composition of the furnace coke and auxiliary materials is unreasonable, and it is difficult to cool the slag and iron in the hearth after the furnace is opened. discharge, the blast furnace start-up work is not smooth, the start-up time is prolonged, and even threatens the safety of the blast furnace start-up

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