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Method for investigating noise character of converter steelmaking blowing slag-making

A technology of noise characteristics and detection methods, applied in special data processing applications, processing response signals of detection, generation of ultrasonic/sonic/infrasonic waves, etc., can solve problems such as low probability of false detection and inaccurate detection by audio slag making method.

Inactive Publication Date: 2009-09-02
SHANDONG JIANZHU UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the current audio slag making method cannot be detected accurately and in time, and to provide a device with high detection accuracy, low probability of missed detection and false detection, and can provide more accurate slagging state, etc. Characteristic detection method of converter steelmaking slag blowing noise

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  • Method for investigating noise character of converter steelmaking blowing slag-making
  • Method for investigating noise character of converter steelmaking blowing slag-making
  • Method for investigating noise character of converter steelmaking blowing slag-making

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Embodiment Construction

[0050] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0051] Since the blowing noise is generated by a non-stationary random process, the frequency spectrum has strong random characteristics, especially the phase is completely random, and it is difficult to analyze its trend. Therefore, the present invention uses the method of calculating its power spectrum to analyze the noise at different frequencies. The intensity distribution and its evolution characteristics on .

[0052] In the steelmaking process, the converter is a time-varying system, so the entire steelmaking process must be divided into many short time intervals, and it can be considered that the state of the converter system remains unchanged in each time interval. Calculate the power spectrum of the blowing noise in each time interval to reflect the slagging characteristics in this time period, which is called the power spectrum, such as figu...

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Abstract

The invention discloses converter steel and slag making air refining noise feature detecting method. It includes the following steps: sampling air refining noise; calculating out the data reflected the slag making state to guide steel making; using Blackman window corrected Welch arithmetic to compute power spectrum; finding out each feature frequency band and its main one to confirm positive and negative ones; processing linear combination for each feature frequency band strength to gain the data reflected current slag making to guide frequency slag making, judging spurting, and dry returning. The result is more exact.

Description

technical field [0001] The invention relates to a method for extracting the state of slagging by blowing noise, in particular to a method for detecting the characteristics of converter steelmaking slagging and blowing noise. technical background [0002] Slagging is one of the key operations in converter steelmaking. Optimizing slagging is a prerequisite for optimizing converter steelmaking. Only when good slag is formed in the steelmaking process can the harmful elements such as sulfur and phosphorus in molten steel be effectively removed, and the improvement can be achieved. steel quality. According to the height of the slag liquid level in the furnace, it can be judged whether the slagging in the furnace is good or bad: if the slag liquid level is too low, it means that the proportion of solid phase substances in the slag increases, and the proportion of liquid phase decreases, and there is a possibility of "drying back". Position or reduce the flow of oxygen; if the sla...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/34G01N29/44G06F19/00
Inventor 李晓峰李学东高晓霞张晓莉杜文华
Owner SHANDONG JIANZHU UNIV
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