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A method for distributing blast furnace pellets

A pelletizing and blast furnace technology, applied in the field of blast furnace material distribution, can solve problems such as the instability of the blast furnace material surface, achieve the effects of reducing sintering costs and pig iron costs, reducing demand, and reducing sintering machine speed

Active Publication Date: 2016-08-24
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to provide a method for distributing blast furnace pellets, which solves the problem of unstable blast furnace material level in the case of large-scale use of pellets, thereby stabilizing the blast furnace airflow, improving blast furnace alignment, reducing pig iron costs, and prolonging the use of blast furnaces life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] Take the 1800m³ blast furnace of Taiyuan Iron and Steel Co., Ltd. as an example to illustrate the method of the present invention. The iron-making raw material structure used in Taiyuan Iron and Steel's 1800m³ blast furnace is "60% sintering + 40% pellets", and the mass of a batch of iron-making raw materials commonly used in the 1800m³ blast furnace is 46t, so the mass of sintered ore in the 46t iron-making raw material should be 27.6 t, the mass of the pellets should be 18.4t.

[0023] ① According to the method of the present invention, the amount of the pellets is divided according to a certain ratio. Commonly used pellet split ratios for 1800m³ blast furnaces are 20%, 57.5%, and 22.5%. In this way, the amount of pellets is divided into three parts: 3.68t, 10.58t, and 4.14t.

[0024] ②In order to divide the pellets, the amount of sintering is also divided according to a certain proportion. The commonly used sintering split ratios for 1800m³ blast furnaces are 35%,...

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Abstract

The invention discloses a method for distributing blast furnace pellets and belongs to the technical field of blast furnace pellet distribution. The present invention creatively uses the difference in the characteristics of the raw materials used in the blast furnace to rationally divide the pellets used in a large proportion, and divides the flow characteristics of the pellets by using the sintered raw materials, so that the pellets no longer have the "flow characteristics" when used in a large proportion. In order to completely solve the problem of instability of the blast furnace material surface after high proportion of pellets are used, the air flow in the upper part of the blast furnace can be stabilized, the utilization rate of blast furnace gas can be improved, and the cost of pig iron can be reduced.

Description

technical field [0001] The invention relates to a method for distributing blast furnace pellets, and belongs to the technical field of blast furnace distributing materials. Background technique [0002] Generally speaking, the default upper limit of the proportion of pellets in raw materials in my country's ironmaking industry is 20%. When the proportion of pellets in the raw materials used in the blast furnace exceeds 20%, due to the strong rolling effect of the pellets, the material surface formed by the blast furnace raw materials will become unstable, and the unstable material surface will greatly affect The stability of the gas flow from the blast furnace charge surface (in the blast furnace, the charge moves downward from the upper part of the blast furnace, while the gas flow moves upward from the lower part of the blast furnace, and the direction of movement of the two is just opposite), while the difference of the gas flow Stability will affect the forward motion o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00
Inventor 张军徐纪山李勇刚
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD