A method of using high temperature oxygen jet to control the bottom rise of 120t converter

A technology of jet flow control and converter bottom, which is applied in the field of carbon steel smelting, can solve the problems of increased converter consumption, furnace bottom, and process re-drying, etc., so as to prolong the service life of equipment, ensure normal operation, and reduce consumption. Effect

Active Publication Date: 2022-07-22
山东磐金锻造机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During converter smelting, due to reasons such as high alkalinity, high magnesium oxide content, final slag viscosity, and slag splashing during slag operation, the bottom of the furnace will rise, the volume of the converter will decrease, the splashing will increase, and the process will dry back and other problems, resulting in consumption of the converter. Increase and damage equipment, which is not conducive to the safe operation of the converter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for controlling the rise of the bottom of a 120t converter by utilizing a high-temperature oxygen jet, comprising the following steps:

[0022] (1) Determine the depth of the molten pool under different loading amounts, the depth of the molten pool with the loading amount of 160t is 1500mm, and the depth of the molten pool with the loading amount of 140t is 1312mm;

[0023] (2) Increase the Mach number of the airflow at the outlet of the oxygen lance nozzle, and control the Mach number of the airflow at the outlet of the oxygen lance nozzle to be 2.05;

[0024] (3) Measure the gun position once every shift to confirm the height of the furnace bottom;

[0025] (4) If the furnace bottom does not rise or the furnace bottom size rises ≤20cm, the total loading capacity is 160t, the pressure before the oxygen lance is 0.8Mpa, and the oxygen flow rate is 38000m 3 / h, the carbon pulling gun position is 1.4m, the carbon pulling time is 30s, and the impact depth is h 冲...

Embodiment 2

[0028] A method for controlling the rise of the bottom of a 120t converter by utilizing a high-temperature oxygen jet, comprising the following steps:

[0029] (1) Determine the depth of the molten pool under different loading amounts, the depth of the molten pool with the loading amount of 160t is 1500mm, and the depth of the molten pool with the loading amount of 140t is 1312mm;

[0030] (2) Increase the Mach number of the airflow at the outlet of the oxygen lance nozzle, and control the Mach number of the airflow at the outlet of the oxygen lance nozzle to be 2.05;

[0031] (3) Measure the gun position once every shift to confirm the height of the furnace bottom;

[0032] (4) If the furnace bottom does not rise or the furnace bottom size rises ≤20cm, the total loading capacity is 160t, the pressure before the oxygen lance is 0.8Mpa, and the oxygen flow rate is 38500m 3 / h, the carbon pulling gun position is 1.4m, the carbon pulling time is 30s, and the impact depth is h 冲...

Embodiment 3

[0035] A method for controlling the rise of the bottom of a 120t converter by utilizing a high-temperature oxygen jet, comprising the following steps:

[0036] (1) Determine the depth of the molten pool under different loading amounts, the depth of the molten pool with the loading amount of 160t is 1500mm, and the depth of the molten pool with the loading amount of 140t is 1312mm;

[0037] (2) Increase the Mach number of the airflow at the outlet of the oxygen lance nozzle, and control the Mach number of the airflow at the outlet of the oxygen lance nozzle to be 2.05;

[0038] (3) Measure the gun position once every shift to confirm the height of the furnace bottom;

[0039] (4) If the furnace bottom does not rise or the furnace bottom size rises ≤20cm, the total loading capacity is 160t, the pressure before the oxygen lance is 0.8Mpa, and the oxygen flow rate is 39000m 3 / h, the carbon pulling gun position is 1.4m, the carbon pulling time is 30s, and the impact depth is h 冲...

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PUM

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Abstract

The invention belongs to the technical field of carbon steel smelting, and in particular relates to a method for controlling the rise of the bottom of a 120t converter furnace by using a high-temperature oxygen jet, comprising: determining the depth of a molten pool according to the loading capacity of the converter; Measure the gun position once every shift to confirm the height of the furnace bottom; determine whether the furnace bottom size has risen by more than 20cm, and adjust the oxygen lance pressure, oxygen flowmeter, carbon gun, alkalinity and magnesium oxide content according to the rising size. The invention is simple to operate, can effectively control the rise of the furnace bottom, reduce the consumption of refractory materials of the converter, prolong the service life of the equipment, and ensure the normal operation of the converter.

Description

technical field [0001] The invention belongs to the technical field of carbon steel smelting, and in particular relates to a method for controlling the rise of the bottom of a 120t converter by utilizing a high-temperature oxygen jet. Background technique [0002] Carbon steel is the earliest and most used basic material in modern industry. While striving to increase the output of low-alloy high-strength steel and alloy steel, industrial countries in the world also pay great attention to improving the quality of carbon steel and expanding the variety and scope of use. [0003] At present, the proportion of carbon steel output in the total steel output of various countries remains about 80%. It is not only widely used in construction, bridges, railways, vehicles, ships and various machinery manufacturing industries, but also in the modern petrochemical industry. , marine development, etc., have also been widely used. [0004] According to the different carbon content, the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/30C21C5/46C21C5/48
CPCC21C5/30C21C5/462C21C5/466C21C5/48
Inventor 薛明亮傅士刚郭栋魏森黄彦飞魏文升杜建勇郭素萍
Owner 山东磐金锻造机械有限公司
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