Low-titanium furnace protection process of blast furnace

Abstract

The invention relates to a low-titanium furnace protection process of a blast furnace. The process comprises the steps that a furnace protection effect is achieved by adopting a manner of achieving blowing after mixing titanium fine powder and pulverized coal, different proportioning standards are determined according to the proportion of iron ore and coke in raw materials during blast furnace ironmaking, different proportions of the titanium fine powder and the pulverized coal are determined by combining the iron content of iron ore under the different proportioning standards, meanwhile, a detection period is preset, the thickness change of a blast furnace lining is detected, and the furnace protection effect of the blast furnace is judged according to the thickness change rate of the blast furnace lining; and when the furnace protection effect is abnormal, the flow of a blowing spray head, the proportion of the titanium fine powder to the pulverized coal and the input quantity of thetitanium fine powder are adjusted in real time according to the thickness change of the lining under the abnormal condition in combination with the proportioning standards, it is guaranteed that thefurnace protection effect of the blast furnace is in a good state through continuous adjustment, and the service life of the blast furnace is prolonged.

Description

technical field [0001] The invention belongs to the field of furnace protection technology, in particular to a low-titanium furnace protection technology for blast furnaces. Background technique [0002] As the modern iron and steel industry is facing fierce competition, it is more important than ever to reduce the cost of iron and steel production. The life of a blast furnace in an iron and steel enterprise is related to the production status of the blast furnace and the economic benefits of the enterprise. With the intensification of blast furnace smelting, the erosion of the blast furnace body has been intensified, and the quality of the hearth and bottom of the blast furnace has become one of the main limiting links that affect the lifetime of the blast furnace. In addition, the carbon bricks at the bottom and hearth of the blast furnace must maintain a certain thickness at the end of the furnace service to ensure the stable operation of the blast furnace; generally, whe...

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Problems solved by technology

In addition, the carbon bricks at the bottom and hearth of the blast furnace must maintain a certain thickness at the end of the furnace service to ensure the stable operation of the blast furnace; generally, when the smelting intensity of the blast furnace increases, it will often lead to burn-through accidents at the bottom of the furnace, affecting The technical and economic indicators and safety of the first-generation furnace, therefore, to find a way to prolong the life of the blast furnace is an urgent task for the majority of ironmaking scientific and technological workers. The conventional method of protecting the furnace in modern metallurgy is to send titanium-containing materials into the blast furnace, Titanium-containing materials are reduced in the blast furnace to produce high-melting-point titanium carbonitrides for furnace protection, but the following problems still exist in the prior art:

[0003] 1. The lack of accurate determination of the ratio of titanium fine powder and coal powder leads to poor furnace protection effect sometimes due to the ratio of titanium fine powder and coal powder;

[0004] 2. In the process of protecting the furnace, there is a lack of detection of the effect of protecting the furnace, and the corresponding adjustment of parameters in the process of protecting the furnace, resulting in sometimes poor protection effect under long-term combustion

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