Method for controlling filling quantity of slag-iron mixed molten liquid in ladle of ladle car

Abstract

The invention relates to a method for controlling the filling quantity of slag-iron mixed molten liquid in a ladle when molten iron is filled into a ladle car from a metallurgical blast furnace tap hole. The control method comprises the following steps of: obtaining the gross weight of the ladle car through a weighing type weight detecting device, and then obtaining the real-time weight of the slag-iron mixed molten liquid in the ladle through a series of computations; obtaining the liquid level of the slag-iron mixed molten liquid in the ladle through the detection of a molten iron liquid level detecting device, and further computing the real-time volume of the slag-iron mixed molten liquid in the ladle; and then further computing the slag-iron proportion and the slag-iron weight of the slag-iron mixed molten liquid in the ladle by utilizing the real-time weight and volume of the slag-iron mixed molten liquid in the ladle so as to control the filling quantity of the slag-iron mixed molten liquid in the ladle. The automatic detection count for the used times of the ladle of the ladle car is introduced into computation, and a ladle volume increment parameter and a ladle car tare parameter under the specific used times of the ladle are obtained to participate in the computation, so that a computed result is more accurate. The invention enables the filling quantity of the ladle to be more accurate.

Description

technical field [0001] The invention relates to a method for controlling the filling volume of the mixed molten iron slag and iron in the molten iron tank when the taphole of the metallurgical blast furnace is filling molten iron into the molten iron tank car. and their respective weights. Background technique [0002] When the existing blast furnace molten iron tank car is filled with molten iron, in order to control the amount of molten iron poured into the molten iron tank on the molten iron tank car, two measurement methods are generally adopted: the molten iron weight detection technology and the molten iron liquid level detection technology. [0003] The molten iron weight detection technology is to install a track scale on the track at the parking position of the molten iron tanker below the molten iron filling point of the blast furnace. After the molten iron tank car enters the molten iron filling point of the blast furnace, it stops on the track scale. The operato...

AI Technical Summary

Problems solved by technology

This method has the following problems in actual use: 1. When the molten iron tank car arrives at the molten iron filling point of the blast furnace and begins to fill the molten iron, the molten iron tank is not necessarily an empty tank. Sometimes there is still a lot of molten iron left in the molten iron tank. After the weight is peeled, the calculation accuracy is seriously affected, and even when the calculated molten iron filling weight does not reach the rated weight, the actual molten iron level has overflowed the tank mouth

2. When filling molten iron, the molten iron poured into the molten iron tank is not necessarily molten iron with high iron content. Sometimes the molten iron poured into the molten iron tank contains a large amount of iron slag. The weight of the slag-iron mixed melt is very light, so that when the filling weight of the molten iron does not reach the rated weight, the actual molten iron level has already overflowed the mouth of the tank

3. The inner lining of the hot metal tank is made of refractory materials. As the number of times of use of the hot metal tank increases, the refractory lining of the hot metal tank will gradually erode, causing the tare weight and volume changes of the hot metal tank car to affect the relationship between the weight of the hot metal and the liquid level.

[0005] Although in Chinese patent application number: 200610147760.0 in the "method for controlling the amount of molten iron filling in molten iron tanker", the amount of erosion of refractory lining in the molten iron tank is introduced to control the liquid level of molten iron filling, which compensates to a certain extent. The impact of the change of refractory lining in the tank on the filling liquid level, but after all, it has nothing to do with the specific gravity and weight of the slag-iron mixed melt. After all, it is still a method of molten iron filling control based on liquid level detection. When the specific gravity of the slag-iron mixed melt changes greatly, there is still a large error in the real molten iron content in the slag-iron mixed melt

The errors of the actual molten iron content in the slag-iron mixed melt in the molten iron tank caused by the above-mentioned various methods will inevitably affect the operating efficiency and production cost of the next process.

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