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A kind of high aluminum ore blast furnace smelting method

A blast furnace smelting and high alumina technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of high alumina slag viscosity, poor fluidity of slag and iron, and poor air permeability of blast furnaces.

Inactive Publication Date: 2016-08-24
SHANDONG IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a blast furnace smelting method for high alumina ore, which adapts to high The characteristics of aluminum slag smelting have basically solved the problems of high aluminum slag viscosity, poor air permeability of blast furnace, and poor fluidity of slag and iron in high alumina ore smelting, and realized the stable operation of blast furnace

Method used

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  • A kind of high aluminum ore blast furnace smelting method
  • A kind of high aluminum ore blast furnace smelting method
  • A kind of high aluminum ore blast furnace smelting method

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Experimental program
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Embodiment Construction

[0085] Laiwu Steel 1-6#1000m 3 The blast furnace is taken as an example to further illustrate the specific embodiments of the present invention.

[0086] 1. Ingredients:

[0087] In the "Ore Blending" interface, using "Al, Si, Ca" as the basic parameters, the basic parameters are collected, and the secondary fitting regression analysis is performed to determine the control threshold of the "Ore Blending" from a macro perspective. The specific steps are as follows:

[0088] (1) Acquisition parameters are shown in Table 1:

[0089] Table 1 ore blending collection parameters

[0090] Al 2 O 3 / SiO 2

CaO / SiO 2

0.25

1.72

[0091] 0.26

1.75

0.27

1.77

0.28

1.78

0.29

1.79

0.3

1.81

0.31

1.85

0.32

1.9

0.33

1.94

0.34

1.95

0.35

2

0.36

2.03

0.37

2.07

0.38

2.11

0.39

2.17

0.4

2.22

0.41

2.24

0.42

2.25

0.43

2.31

0.44

2.35

0.45

2.37

[0092] (2) Secondary fitting regression analysis:

[0093] Open "Mintab" and enter the acquisition parameters of Table 1 into the worksheet; click the "Probability Diagram" button in t...

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Abstract

The invention discloses a high aluminum ore blast furnace smelting method. The method regards ore blending, furnace entering ores, coke and blasting as basic acquisition parameters, adjusting and control threshold values of Al2O3 / SiO2 and CaO / SiO2, the furnace entering grade, the coke thermal state intensity and the blasting momentum are determined through quadratic fit regression analysis and according to a quadratic fit regression analysis prediction interval, the rate of sintered ores is adjusted according to the adjusting and control threshold values, and smooth operation of a blast furnace is guaranteed.

Description

Technical field [0001] The invention belongs to the technical field of blast furnace smelting production in the iron and steel industry, and in particular relates to a high alumina blast furnace smelting method. Background technique [0002] The situation in the iron and steel industry is severe, and due to cost pressures, various production companies have gradually shifted from "concentrate smelting" to "economic smelting". While various economic mines have price advantages, the harmful elements among them are much higher than normal materials. Taking into account the longevity of the blast furnace, high alumina ore has become the preferred resource of various manufacturers. Al in blast furnace slag 2 O 3 When the content is 10% to 15%, it is beneficial to improve the stability of the slag, and Al 2 O 3 When the content is less than 15%, it is a low-aluminum slag, which can improve the stability of the slag and is beneficial to the operation of the blast furnace; but when Al 2 O...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00
Inventor 潘林胡守忠张均宾王辉徐春玲李贡生李霞王尚东房盼盼
Owner SHANDONG IRON & STEEL CO LTD
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