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Method for dynamically judging state of slags in converter smelting process

A converter smelting and slag technology is applied in the field of dynamically judging the slag state in the converter smelting process, which can solve the problems that the slag state cannot be reflected thoroughly, the difference of the slag state, and cannot be accurately judged, so as to avoid slag splashing. Or the effect of re-drying accidents, stabilizing the production of 120 tons of converters, and ensuring the quality of molten steel

Active Publication Date: 2016-06-22
HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can quantitatively reflect the state of the slag in the converter and improve the judgment level of the operator on the slag; however, this method still has the following problems: (1) This method is only a simple audio frequency analysis of the noise in the converter Therefore, this method cannot fully reflect the state of slag, and manual experience is required; (2) Due to the large number of equipment on the converter site, many This kind of noise source will interfere with the actual operation effect of the sonar equipment, resulting in greatly reduced the actual working effect of the sonar equipment; (3) due to the great difference in the state of the slag under different viscosities, it is still impossible to accurately rely on the sonar slag removal equipment Determine the current state of the slag

Method used

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  • Method for dynamically judging state of slags in converter smelting process
  • Method for dynamically judging state of slags in converter smelting process
  • Method for dynamically judging state of slags in converter smelting process

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0162] In the pre-converter smelting stage, the height H from the furnace bottom to the furnace mouth in the converter is input to the slag state detection smelting computer 1 Bof is 8.5m, the mass of molten iron added to the converter is W iron is 105 ton, the quality of steel scrap added to the converter is W fg It is 10 tons. Additionally, setting a gun =0.1,b gun =0.9, a 氧气 =0.1,b 氧气 =0.9, a 烟气 =0.1,b 烟气 =0.9, a CO =0.1,b CO =0.9, a S =0.1,b S = 0.9.

[0163] The slag state detection computer 1 respectively detects and analyzes the data related to judging the slag state through the intermediate communication PLC2 according to the acquisition period of 1s:

[0164] Through the feedback and analysis of the oxygen flow sensor 3, the stable flow of oxygen at the current moment in the converter smelting stage is obtained 5.83m 3 / s;

[0165] Through the feedback and analysis of the gravity sensor, the stable quality of the oxygen lance at the last moment befor...

example 2

[0185] In the pre-converter smelting stage, the height H from the furnace bottom to the furnace mouth in the converter is input to the slag state detection smelting computer 1 Bof is 8.5m, the mass of molten iron added to the converter is W iron is 110ton, the quality of steel scrap added to the converter is W fg It is 8 tons. Additionally, setting a gun =0.15,b gun =0.85, a 氧气 =0.15,b 氧气 =0.85, a 烟气 =0.15,b 烟气 =0.85, a CO =0.15,b CO =0.85, a S =0.15,b S = 0.85.

[0186] The slag state detection computer 1 respectively detects and analyzes the data related to judging the slag state through the intermediate communication PLC2 according to the acquisition cycle of 1.5s:

[0187] Through the feedback and analysis of the oxygen flow sensor 3, the stable flow of oxygen at the current moment in the converter smelting stage is obtained 5.90m 3 / s;

[0188] Through the feedback and analysis of the gravity sensor, the stable quality of the oxygen lance at the last mom...

example 3

[0208] In the pre-converter smelting stage, the height H from the furnace bottom to the furnace mouth in the converter is input to the slag state detection smelting computer 1 Bof is 8.5m, the mass of molten iron added to the converter is W iron is 106 ton, the quality of steel scrap added to the converter is W fg It is 10 tons. Additionally, setting a gun =0.2,b gun =0.8, a 氧气 =0.2,b 氧气 =0.8, a 烟气 =0.2,b 烟气 =0.8, a CO =0.2,b CO =0.8, a S =0.2,b S = 0.8.

[0209] The slag state detection computer 1 respectively detects and analyzes the data related to judging the state of slag through the intermediate communication PLC2 according to the acquisition cycle of 2s:

[0210] Through the feedback and analysis of the oxygen flow sensor 3, the stable flow of oxygen at the current moment in the converter smelting stage is obtained 5.85m 3 / s;

[0211] Through the feedback and analysis of the gravity sensor, the stable quality of the oxygen lance at the last moment bef...

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Abstract

The invention relates to a method for dynamically judging the state of slags in the converter smelting process and belongs to the technical field of metallurgy converter control. The technical scheme adopted by the invention is that the method comprises the following steps of transmitting information about the mass of an oxygen lance, oxygen flow, flue gas flow, noises in a converter as well as the concentrations of CO and CO2 in flue gases which are outputted in real time to a computer for detecting the state of the slags through an intermediate information PLC (Programmable Logic Controller); performing composite dynamic analysis on the information by using a built-in model in the computer; comprehensively judging whether the slags are in a partially-dry or partially-diluted state at the current moment; and sending a risk early warning that the slags get dry or slop, and timely processing. According to the method disclosed by the invention, on the basis of an original application of equipment which is arranged on a 120-ton converter at the production site, relational factors between the state of the slags in the converter smelting process and the information acquired by the equipment are fully considered, the factors are fused, the characteristics of various factors are fully exerted, and composite dynamic detection for the state of the slags from the 120-ton converter is realized; and on the premise of reducing the cost of the equipment, the risk early warning that the slags get dry or slop in the converting smelting process is realized.

Description

technical field [0001] The invention relates to a method for dynamically judging the state of slag in a converter smelting process, in particular to a method for dynamically judging the state of slag in a converter with a nominal capacity of 120 tons in the normal steelmaking process, and belongs to the technical field of metallurgical converter control. Background technique [0002] During the converter smelting process, the main job of the on-site operators is to ensure that the current state of the converter slag at the time of production can meet the needs of the dephosphorization and decarburization processes. This is because the appropriate slag state (i.e. moderate viscosity) is helpful to improve the dephosphorization and decarburization effect of molten steel and ensure the quality of molten steel at the end of the converter; Splashing accidents are easy to occur in the converter production process. The mild ones will cause a drop in the metal yield and cause econom...

Claims

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Application Information

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IPC IPC(8): C21C5/32C21C5/46
CPCC21C5/32C21C5/4673Y02P10/25
Inventor 贾国生范佳王彦杰孙玉虎郭辉高福彬孙江波刘红艳
Owner HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
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