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A 1050m 3 Preparation process of stuffy charge for high-grade blast furnace

A stuffy furnace and blast furnace technology, which is applied in the field of 1050m3 blast furnace stuffy charge preparation technology, can solve problems such as blast furnace start-up failure, stuffy charge burnout, slag composition unreasonable, etc., and achieve good slag fluidity, hearth The effect of abundant heat and scientific composition of slag

Active Publication Date: 2022-02-01
SGIS SONGSHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • A 1050m  <sup>3</sup> Preparation process of stuffy charge for high-grade blast furnace
  • A 1050m  <sup>3</sup> Preparation process of stuffy charge for high-grade blast furnace
  • A 1050m  <sup>3</sup> Preparation process of stuffy charge for high-grade blast furnace

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Embodiment

[0033] A 1050m 3 Preparation method of blast furnace stuffing charge. Specifically, the technical solution includes the following:

[0034] In the step B, the ratio of sintered ore accounts for 85%, the ratio of pelletized ore accounts for 10%, and the ratio of raw ore accounts for 5%.

[0035] In the step B, the ingredients of various raw materials in the furnace charge are as follows.

[0036]

[0037] In the step B, the charging amount of each section is as follows.

[0038]

[0039]

[0040] In the step B, the stuffy charge products are shown in the table below.

[0041]

[0042] Through the preparation of a reasonable and scientific blast furnace material structure, the blast furnace can be shut down for 22 days with a full material line of 1.3 meters. During the start-up process of the blast furnace, the heat in the hearth is abundant, and the slag has good fluidity. After 30 hours of full-air smelting, the utilization factor of the blast furnace reaches ...

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Abstract

The present invention relates to a 1050m³ level blast furnace stuffy charge preparation process, comprising the following steps: A. Calculate the volume between the blast furnace tuyere centerline and the stock line according to the blast furnace design furnace type; B. Control ore proportioning; C. Fill the stuffy charge , pig iron composition: Fe90‑91%, Si3.5‑4.0%, Mn0.6‑0.7%, slag yield 1.0‑1.05%, total furnace coke ratio 5275‑5285kg / t; Composition, the first section: net focus section; the second section: empty focus section; the third section: light load section. Reasonable preparation of the furnace charge, the slag composition in the blast furnace charge is more scientific, the heat of the hearth is abundant during the blast furnace opening process, and the slag fluidity is good, achieving a 1050m³ blast furnace for more than 20 days. The purpose of wind smelting.

Description

technical field [0001] The invention belongs to the technical field of blast furnace stuffy furnace, and relates to a 1050m 3 Advanced blast furnace stuffing charge preparation process. 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 st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00
CPCC21B5/008
Inventor 陈生利张怡伟吴金富匡洪锋曹旭刘传院何新周凌云于美晨
Owner SGIS SONGSHAN CO LTD
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