Method for monitoring faults in smelting process of multimode magnesia electrical smelting furnace

Abstract

The invention relates to a method for monitoring faults in a smelting process of a multimode magnesia electrical smelting furnace. According to the method, a historical normal data set of different working modes in the smelting process of the multimode magnesia electrical smelting furnace is obtained; a subspace separation model based on a mass nucleus locally linear embedding method is created; T2 statistic control limit of global public subspace of historical normal data and SPE (squared prediction error) statistic control limit of local special subspace of each of different working modes are calculated; a new data set in a current working mode is acquired in real time; T2 statistic of global public subspace of new data and SPE statistic of corresponding local special subspace in the current working mode are calculated; and if the T2 statistic of the global public subspace of the new data exceeds the T2 statistic control limit of the global public subspace of the historical normal data, or the SPE statistic of the corresponding local special subspace of the new data exceeds the SPE statistic control limit of the local special subspace of the historical normal data in the working mode, the current working mode in the smelting process of the multimode magnesia electrical smelting furnace has possibility of fault occurrence.

Description

technical field [0001] The invention belongs to the technical field of fault detection, and in particular relates to a multi-mode fault monitoring method for the smelting process of an electric fused magnesium furnace. Background technique [0002] The metallurgical industry is an important pillar industry in my country, and it is also an industry with high energy consumption, high emissions and high pollution. With the development of smelting technology, fused magnesia furnaces have been widely used in the magnesia production industry. [0003] The fused magnesium furnace introduces a large current through the electrode to form an arc to generate high temperature to complete the melting process. At present, the degree of automation in the smelting process of most fused magnesium furnaces in my country is still relatively low, which often leads to frequent failures and abnormal situations. Among them, due to the failure of the electrode actuator and other reasons, the elect...

AI Technical Summary

Problems solved by technology

At present, the degree of automation in the smelting process of most fused magnesium furnaces in my country is still relatively low, which often leads to frequent failures and abnormal situations. Among them, due to the failure of the electrode actuator and other reasons, the electrode is too close to the furnace wall of the fused magnesium furnace, making the furnace temperature Abnormal, which can lead to the melting of the furnace body of the fused magnesium furnace. Once the melting furnace occurs, it will cause a lot of property damage and endanger personal safety.

In addition, due to the fixed furnace body and abnormal actuators, the position of the electrode remains unchanged for a long time, resulting in uneven furnace temperature, resulting in high temperature near the electrode and low temperature in the area far away from the electrode. Once the temperature in the area near the electrode is too high, it is easy to Causes "burning" charge; while the temperature of the area far away from the electrode is too low to form a dead material area, which will seriously affect product yield and quality

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