CN109022668A - Converter oxygen lance control method - Google Patents

Abstract

A converter oxygen lance control method is characterized in that the acquisition of converter mouth noise audio frequency is utilized for signal processing, the noise signal of the converter mouth is fed back to a converter secondary model control computer, the secondary model control computer timely and automatically adjusts the oxygen lance position according to the audio frequency digital signal of noise, and the automatic control of the oxygen lance in the smelting process is realized; the specific method comprises the following steps: compared with the prior art, the invention has the beneficial effects that: a converter oxygen lance control method is characterized in that a noise acquisition device is arranged at a converter mouth, acquired audio signals are subjected to digital signal processing, the foaming state of slag in a converter can be reflected more accurately in time, and the audio signals are fed back to a secondary computer to adjust the position of an oxygen lance, so that the reaction is more timely and more accurate than that of an operator, the labor intensity of the operator is reduced, and the full-automatic control of the oxygen lance is realized.

Description

A kind of converter oxygen gun control method

Technical field

The present invention relates to one of converter steelmaking process oxygen rifle control methods.

Background technique

Under normal conditions, converter lifting of oxygen rifle in smelting process mainly relies on the experience of operator to judge, When smelting process is returned it is dry when oxygen rifle up promote oxygen lance position, oxygen rifle rifle can be reduced when the serious foamed of smelting process slag Position.Under the conditions of automatic Steelmaking, oxygen lance position is controlled by the rifle position that level two computer gives, but due to raw strip The influence of the external factors such as the variation of part, oxygen lance position also need operator to be adjusted according to slag state.

It needs to participate in chemical reaction by the way that flux is added to effectively remove harmful element in molten steel in converter steelmaking process P and s, when foaming slag forms more early in smelting process, foamed is held time longer, the removing to phosphorus, element sulphur It is more advantageous.The foamed of slag is better, smaller in the noise that converter mouth generates, on the contrary, fire door is made an uproar when molten bath occurs returning dry Sound is bigger.Converter second level can be transmitted signals to by going forward side by side after digitized is handled in fire door installation noise gathering device, To automatically control oxygen lance lifting.

Summary of the invention

The object of the present invention is to provide a kind of converter oxygen gun control method, gone forward side by side line number by the acquisition of converter mouth noise After word signal processing, more can foaming slag state in reaction converter promptly and accurately, and timely feedback to level two computer pair Oxygen lance position is adjusted, and reacts more timely, more acurrate than operator, and reduce the labor intensity of operator.

To achieve the above object, the present invention is implemented with the following technical solutions:

A kind of converter oxygen gun control method, this method are the acquisitions using converter mouth noise audio and carry out at signal The noise signal of converter mouth is fed back to converter second-level model control computer by reason, and second-level model controls computer according to making an uproar The in due course adjust automatically oxygen lance position of the audio digital signals of sound realizes that smelting process oxygen rifle automatically controls；The specific method is as follows:

1) level two computer will be sent to after converter mouth noise digital signal processing；

2) converter level two computer is shown in Table 1 to the setting of the initial rifle position of oxygen rifle:

Table 1

Molten iron silicon %	Early period rifle position	Mid-term rifle position	Later period rifle position
				Si < 0.3	225~235cm	255~265cm	235~245cm
0.3≤Si < 0.4	225~235cm	250~260cm	235~245cm
				0.4≤Si < 0.5	225~235cm	245~255cm	235~245cm
0.5≤Si < 0.6	215~225cm	240~250cm	230~240cm
				Si≥0.6	215~225cm	235~245cm	225~235cm

3) it bessemerizes fire door noise gathering after beginning and goes forward side by side and be constantly sent to level two computer after line number word processing；

4) after level two computer is to the processing of noise digital signaling moduleization, the corresponding initial rifle position of oxygen rifle is divided into 9 classes and carries out oxygen The control setting of rifle rifle position；

5) level two computer gives an order with the rifle position movement table of comparisons to primary computer according to noise signal classification, and rifle position is dynamic It compares table and is shown in Table 2:

Table 2

6) it calculates within the instruction that level two computer acts primary computer oxygen lance position every 30 seconds primary.

Compared with prior art, the beneficial effects of the present invention are:

A kind of converter oxygen gun control method is to install noise gathering device in fire door, and the audio signal of acquisition is carried out Digital Signal Processing, more can foaming slag state in reaction converter promptly and accurately, and timely feedback to level two computer pair Oxygen lance position is adjusted, and is reacted more timely, more acurrate than operator, and reduce the labor intensity of operator, is realized oxygen The Automatic Control of rifle.

Specific embodiment

Embodiments of the present invention are further illustrated below:

A kind of converter oxygen gun control method, this method are the acquisitions using converter mouth noise audio and carry out at signal The noise signal of converter mouth is fed back to converter second-level model control computer by reason, and second-level model controls computer according to making an uproar The in due course adjust automatically oxygen lance position of the audio digital signals of sound realizes that smelting process oxygen rifle automatically controls；The specific method is as follows:

1) level two computer will be sent to after converter mouth noise digital signal processing；

2) converter level two computer is shown in Table 1 to the setting of the initial rifle position of oxygen rifle:

Table 1

Molten iron silicon %	Early period rifle position	Mid-term rifle position	Later period rifle position
				Si < 0.3	225~235cm	255~265cm	235~245cm
0.3≤Si < 0.4	225~235cm	250~260cm	235~245cm
				0.4≤Si < 0.5	225~235cm	245~255cm	235~245cm
0.5≤Si < 0.6	215~225cm	240~250cm	230~240cm
				Si≥0.6	215~225cm	235~245cm	225~235cm

3) it bessemerizes fire door noise gathering after beginning and goes forward side by side and be constantly sent to level two computer after line number word processing；

4) after level two computer is to the processing of noise digital signaling moduleization, the corresponding initial rifle position of oxygen rifle is divided into 9 classes and carries out oxygen The control setting of rifle rifle position；

Noise signal 1~3 representative return it is dry, 1 for seriously return it is dry, 2 for return it is dry, 3 most it is weak return it is dry；Noise signal 5~7, which represents, to be run Slag, 7 run slag to be serious, and 6 is run slag, and 5 be the slag that overflows；4 to represent slag state normal, that is, meets dephosphorization, desulfurization requirement, and will not make At race slag.

5) level two computer gives an order with the rifle position movement table of comparisons to primary computer according to noise signal classification, and rifle position is dynamic It compares table and is shown in Table 2:

Table 2

The corresponding initial rifle position of oxygen rifle, according to the lifting or depressing and carry out automatically controlling to oxygen rifle of 9 kinds of situations in table 2, table 2 In positive sign (+) indicate oxygen rifle lift, negative sign (-) indicate oxygen rifle pressure.

6) it calculates within the instruction that level two computer acts primary computer oxygen lance position every 30 seconds primary.

Heretofore described level two computer is responsible for the setting of program and sends operational order, level-one to primary computer Computer is PLC programming, is responsible for receiving second level instruction and carries out operation control to oxygen rifle according to instruction.

Claims (1)

1. a kind of converter oxygen gun control method, which is characterized in that this method is gone forward side by side using the acquisition of converter mouth noise audio The noise signal of converter mouth is fed back to converter second-level model control computer by row signal processing, and second-level model control calculates Machine realizes that smelting process oxygen rifle automatically controls according to the in due course adjust automatically oxygen lance position of audio digital signals of noise；Specific side Method is as follows:

1) level two computer will be sent to after converter mouth noise digital signal processing；

2) converter level two computer is shown in Table 1 to the setting of the initial rifle position of oxygen rifle:

Table 1

Molten iron silicon % Early period rifle position Mid-term rifle position Later period rifle position Si < 0.3 225~235cm 255~265cm 235~245cm 0.3≤Si < 0.4 225~235cm 250~260cm 235~245cm 0.4≤Si < 0.5 225~235cm 245~255cm 235~245cm 0.5≤Si < 0.6 215~225cm 240~250cm 230~240cm Si≥0.6 215~225cm 235~245cm 225~235cm

3) it bessemerizes fire door noise gathering after beginning and goes forward side by side and be constantly sent to level two computer after line number word processing；

4) after level two computer is to the processing of noise digital signaling moduleization, the corresponding initial rifle position of oxygen rifle is divided into 9 classes and carries out oxygen rifle rifle Position control setting；

5) level two computer gives an order with the rifle position movement table of comparisons to primary computer according to noise signal classification, rifle position movement pair 2 are shown in Table according to table:

Table 2

6) it calculates within the instruction that level two computer acts primary computer oxygen lance position every 30 seconds primary.