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High aluminum ore blast furnace smelting method

A technology of blast furnace smelting and high alumina ore, which is applied to blast furnaces, blast furnace details, furnaces, etc., can solve problems such as high viscosity of high alumina slag, poor fluidity of slag and iron, and poor air permeability of blast furnaces

Inactive Publication Date: 2015-06-10
SHANDONG IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • High aluminum ore blast furnace smelting method
  • High aluminum ore blast furnace smelting method
  • High aluminum ore blast furnace smelting method

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Experimental program
Comparison scheme
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Embodiment Construction

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

[0086] 1. Ingredients:

[0087] In the interface of "mineral blending", take "Al, Si, Ca" as the basic parameters, collect basic parameters, do quadratic fitting regression analysis, and then determine the control threshold of "mineral blending" from a macro perspective. The specific operation steps are as follows:

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

[0089] Table 1 Mineral 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

...

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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 blast furnace smelting method for high alumina ore. Background technique [0002] The situation in the iron and steel industry is grim. Due to cost pressure, various production enterprises have gradually shifted from "concentrate smelting" to "economic smelting". Various economic minerals have price advantages, and the harmful elements in them are much higher than normal materials. Taking into account the longevity of the blast furnace, high alumina ore has become the preferred resource for 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 slag, Al 2 o 3 When the content is less than 15%, it is low aluminum slag, which can improve the stability of slag and is beneficial to blast furnace operation; 2 o 3 When the content cont...

Claims

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Application Information

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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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