Method of on-line thread feeding and furnace protecting of ironmaking blast furnace and thread feeding device thereof

Abstract

The invention provides a wire-feeding and furnace protection method of blast furnaces and the wire-feeding device. The purpose is to solve the following problems: conventionally, the Ti-containing furnace protection materials are added into the furnace together with the furnace materials through the top of the furnace. The application of Ti-containing powders will have significant impact on the production system of the furnace. At the same time, the Ti-containing materials will decrease the output of the furnace. In addition, the titanium oxide of the Ti-containing materials is uniformly mixed in the entire slag so that the titanium oxide density in the slag is lowered significantly. The key points of the invention are described in the followings: a wire-feeding device is connected with the coal-spraying mouth of the furnace blast blowpipe. The furnace protection material cored wires are sent to the furnace along the cored wire access of the wire-feeding device. The port through which the furnace protection material cored wires flow into the furnace is just the coal-spraying mouth of the furnace blast blowpipe.

Description

technical field [0001] The invention relates to a method and device for online maintenance and repair of the furnace lining below the tuyere of an ironmaking blast furnace. Background technique [0002] The design life of a modern blast furnace is as high as 15 to 20 years, and damage to the hearth and bottom lining of the blast furnace is an important factor affecting the life of the blast furnace. In particular, the local erosion or damage of the blast furnace hearth and furnace bottom lining that often occurs in production seriously affects the service life of the blast furnace. Online maintenance and repair of hearth and furnace bottom lining, especially for local erosion or damage of blast furnace hearth and furnace bottom lining, will prolong the life of the blast furnace, realize energy saving and consumption reduction of the blast furnace, and reduce production costs. Significant impact and obvious economic benefits. But still lack effective technical method and pr...

AI Technical Summary

Problems solved by technology

When using powdery titanium-containing materials, it is necessary to separately agglomerate the powdery titanium-containing materials or add the agglomeration system of the normal raw materials of the blast furnace for agglomeration, which has a significant impact on the operation of the blast furnace production system

At the same time, due to the addition of titanium-containing materials, the smelting process of the blast furnace has undergone major changes. It is necessary to adjust the operating system of the blast furnace, which will cause a decrease in the output of the blast furnace, and increase the difficulty of tapping iron and slag. A slight improper operation will affect or even destroy the smoothness of the blast furnace. It will have a significant impact on the smooth operation of the production of iron and steel enterprises

[0005] In addition, the titanium-containing material is added to the furnace protection method of the blast furnace from the top of the blast furnace along with the blast furnace production charge. Since the titanium-containing material is added to the blast furnace from the blast furnace top along with the blast furnace production charge, the titanium oxide in the titanium-containing material is evenly mixed into the slag of the entire charge. The concentration of titanium oxide in the slag is greatly reduced, resulting in a large amount of titanium-containing materials, low utilization rate and high maintenance cost, so it is only suitable for the overall maintenance and repair of the lower lining of the blast furnace

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