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A positioning method and slag blocking technology are applied in the direction of manufacturing converters, etc., which can solve problems such as positioning of slag blocking plugs, and achieve the effects of reducing erosion, improving yield, and improving the success rate of slag blocking.
Active Publication Date: 2015-07-15
ANGANG STEEL CO LTD
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[0005] The present invention aims to provide a method for positioning the slag stopper that can solve the problem that the slag stopper cannot be positioned at the angle of the slag stopper added to the converter, thereby improving the success rate of slag stopper and realizing effective control of tapping and lowering slag stopper
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[0016] Below, the present invention will be further described by taking a 180-ton converter as an example.
[0017] When tapping and adding slag blocking darts, the converter angle is -92°.
[0018] The specific method and steps of positioning the slag stopper are as follows:
[0019] 1. When the furnace is empty, shake the converter to the tapping angle of -92°.
[0020] 2. Start the slag blocking dart car, add the slag blocking dart plug into the tapping hole, fix the left and right positions of the slag blocking dart car, and mark and record the front and rear positions of the slag blocking dart car at this time.
[0021] 3. Exit the slag blocking dart car, and then shake the converter down to -100°.
[0022] 4. Add the slag blocking plug into the tapping hole again, record the front and rear positions of the slag blocking dart car at this time, and measure the distance difference between the two front and rear positions of the slag blocking dart car as 550mm.
[0023] 5...
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Abstract
The invention provides a method for positioning a slag stopping plug. The method comprises the following steps: rocking a converter to be in a darting angle in no-load furnace, adding the slag stopping plug into a steel discharge hole, recording the front and rear positions of a slag stopping dart trolley, withdrawing the slag stopping dart trolley, further rocking the converter for a certain angle downwards, further adding the slag stopping plug into the steel discharge hole, recording the front and rear positions of the slag stopping dart trolley at the moment, measuring the front and rear position difference values of the operation, rocking the converter to be in the angle when calibrating the dart each time when the steel discharge hole is changed, adding the slag stopping plug into the steel discharge hole, recording the front, rear, left and right positions of the slag stopping dart trolley at the moment, subsequently moving the slag stopping dart trolley to the opposite direction of darting for the distance of the difference value, that is, the darting position when steel is discharged. By adopting the method, the slag stopping success rate can be increased, the moisture of molten steel can be accurately controlled, molten steel rephosphorization is reduced, alloy consumption is reduced, the alloy element yield is increased, the impurity content in the steel is reduced, the steel ladle refining effect is improved, and erosion on steel ladle materials is reduced.
Description
technical field [0001] The invention belongs to the technical field of steelmaking technology, and in particular relates to a positioning method for a slag blocking dart of a tap hole. Background technique [0002] Slag-stop tapping is one of the necessary means to produce pure steel. It is beneficial to accurately control the composition of molten steel, effectively reduce the return of phosphorus in molten steel, increase the yield of alloy elements, and reduce alloy consumption; it is beneficial to reduce the content of inclusions in steel and improve the ladle. Refining effect; it is also beneficial to reduce the erosion of ladle refractory materials. At present, the slag blocking methods include the slag blocking cap method to block the primary slag discharge, the slag blocking ball, the slag blocking plug, the pneumatic slag blocking device and the pneumatic slag blowing method to block the secondary slag discharge. [0003] A general steelmaking plant adopts the slag...
Claims
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Application Information
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