Molten iron loading amount control method of ironcored ladle car

Abstract

The present invention discloses a hot metal filling quantity control method for hot metal ladle cars, which is characterized in that: the internal volume of a new hot metal ladle at each height is calculated first; each hot metal filling point records the filling times of the hot metal ladle of hot metal ladle car in each ladle number; the lining heights of the hot metal ladle under different filling numbers and the erosion parameters of refractory materials are recorded, summed up and calculated, gaining a relevant database or formula; the real-time liquid level height in the hot metal filling process of the hot metal ladle is detected by a microwave hot metal liquid level detection device; according to the detected liquid level height in hot metal filling process, the filling times of the hot metal ladle in the ladle number which are detected and recorded, the internal volume of the new hot metal ladle at each height, the lining heights under different filling numbers, as well as the refractory material erosion database or formula, the compensation calculation of internal volume is carried out, and then the real-time hot metal volume under the ladle number, the times and the hotmetal liquid level height is finally gained; the real-time hot metal filling weight is worked out by utilizing the gained real-time hot metal volume and the hot metal specific gravity.

Description

(1) Technical field [0001] The invention relates to a method for controlling the filling amount of molten iron when a taphole of a metallurgical blast furnace fills molten iron into a tank car. (2) Background technology [0002] In the prior art, when the blast furnace molten iron tanker is filling molten iron, in order to control the amount of molten iron poured into the molten iron tank on the molten iron tanker, two measurement methods are generally used: weighing type molten iron level detection technology and microwave type liquid level detection technology. [0003] The weighing-type molten iron level 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 operator peels the weight obtained at this time to obtain the net value, and then...

AI Technical Summary

Problems solved by technology

This method has the following problems in actual use: 1. The molten iron tank when the molten iron tank car arrives at the molten iron filling point of the blast furnace and begins to fill the molten iron is not necessarily an empty tank. Sometimes there is still a lot of molten iron remaining in the molten iron tank. After the weight is tared, the calculation accuracy is seriously affected, and even the liquid level of the calculated molten iron actually overflows when it reaches the rated liquid level

2. The inner lining of the hot metal tank is made of refractory materials. With the increase in the number of times of use of the hot metal tank, the refractory inner lining of the hot metal tank will gradually erode, causing the tare weight and volume changes of the hot metal tanker to affect the conversion relationship between weight and liquid level

3. The total weight of the molten iron tank car and the molten iron is more than 700 tons. The foundation of the track scale is deformed under heavy pressure for a long time, which seriously affects the weighing accuracy. It is difficult to calibrate and correct, and the maintenance cost is high.

4. The orbital scale is installed under the taphole, and the occasional molten iron leakage during molten iron filling may cause damage to the orbital scale

The microwave molten iron filling liquid level detection technology has the following main problems in actual use: 1. The actual filling volume of molten iron is difficult to control

2. It is difficult to accurately grasp the erosion of the refractory lining of the molten iron tank, so that the actual volume of the molten iron tank is an uncertain value, and the measured liquid level data has no practical significance for the filling volume of molten iron

Therefore, the microwave-type molten iron level detection device can only be used as a liquid level overrun alarm control in actual use, not as a molten iron filling volume control

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