【正文】 smooth operation of the system can lance, and returned to inhibit splash stem better results for the converter blowing oxygen gun control process provides an effective method. Oxygen blowing slagging process is oxygen BOF one of the key technology, slagging converter steelmaking process is an important part of Java will have a direct bearing on the smooth steelmaking process, sometimes even causing excess slag Or splash, thereby reducing the yield of steel and stick to the gun. Lance guncontrol directly related to steelmaking process of decarbonization, slagging, the occurrence of warming up and splash. Therefore, we must very good control of the gunlance so that the steelmaking process to be smooth. Blowing process is a plex chemical reaction, the model is nonlinear, different converter There is great difference between, it is difficult to use the model to an accurate description of the traditional control methods used in the fixed guncontrol oxygen Top Winds converter in the application of results were not very satisfactory. In this paper, based on the sound intensity of the oxygengun gun control expert system, through the converter slagging process and the relations between the furnace mouth noise analysis to detect the noise of the furnace mouthto judgement as an expert system based on the establishment of a Application BOF lance in the guncontrol expert system, simulation analysis shows that the system can achieve the oxygengun gun control. 1 lance guncontrol: Converter in the blowing process, the bubble degree of slag and splash back to the stem or have close relations, but also blowing the key to the success or failure. The degree of control foam to control the content of FeO, FeO and oxygen content of the gunsguns also had close ties. Lance position is low, due to fierce reaction furnace raw materials, FeO consumption at a faster rate of speed, resulting in increased melting point of slag, slag fell, oxygen flow direct impact on steel surface, causing back to dry when a gun High, due to oxygen in the itinerary of an increase in the slag, FeO generate increased, an increase of slag, slag surface tension reduction, increase the life span of the bubble, it may lead to slag the splash. Blowing noise when the changes to reflect the strength of the bubble furnace slag thickness and dephosphorization speed through the furnace for sound detection devices near the mouth of a particular band of oxygen flow shares the pool and its impact on noise intensity, with the use of noise dephosphorizing reaction And slagging of the key, guiding the oxygen gun adjustment, and the converter slagging of the monitoring process. BOF I measured the noise intensity and thickness of the furnace slag as the relationship between the oxygen of different guns and the guns have obvious difference. (1) Exposed blowing. In the early smelting, slag has not yet formed, the oxygen flow in a direct impact on a relatively sharp steel surface of the voices. Acoustic noise from the point of oxygen flow directly sent shares in the furnace wall and repeatedly after the formation of reflection and absorption of a characteristic frequency of the noise of the mixture of market. (2) submerged blowing. Converter blowing in the midand late, due to the formation of the bubble residue, makes increase the thickness of slag, slag submerged lance vents, a submerged blowing. Since the existence of the bubble residue, the actual point of the p sound intensity should be through the bubble residue after the sound intensity. The noise of guns and the relationship between the thickness of the bubble residue as follows: 101nI/I0 = α (LH) (1)In, I0 is no bubble in the presence of residue of the sound intensity p point。 α as a residue when the absorption coefficient。 H for the gunlance. When the guns of little change, such noise on the size of the bubble reflects the residue of the thickness or the level of slag. However, when the gunH change too much, especially when oxygen gun vents in the bubble surface residue, oxygen gun repeatedly submerged in blowing and blowing exposed the critical point, the intensity of the noise changes will no longer be able to accurately reflect the foaming slag Changes in the thickness. Therefore, through good sound intensity to control the blowing converter must maintain the steady blowing converter. Sound intensity of the value of the same size relationship existed dephosphorization rate. When the sound intensity of the sound on a momentthe best value in the region of Java, dephosphorization rate on the large, and when the sound intensity in value to the dry zone, the instantaneous rate of dephosphorization small, or even zero. Test data obtained from the regression equation is as follows: In, P for phosphorus volume。 Z for the emulsion layer in the furnace slag height。 sound of smallvalue, description of Java well, but should be controlled not to splash. Thus, the gunoperation in the slag bubble degree of influence in the sound intensity curve reflects the same token, can also use the sound intensity of the guncontrol operation. In the course of production of oxygenflow stocks and shares the voices of the voice spectrum impact pool hold a major position. Acquisition noise, use above the noise of a gun with oxygen and dephosphorization of oxygen can be drawn between the best gun control scheme. 2 Based on the sound intensity of the oxygengun gun expert system. In order to make better use of sound intensity information to the guncontrol oxygen guns, regulating the production process, based on the proposed special sound intensity of the gun experts oxygen gun control system. The expert system includes three kinds of major environment: knowledge systems, development environment and operating environment. Knowledge System is flexible and can include all the expert knowledge of the sys