Control method of steel cast ending

Abstract

The invention relates to a control method of steel cast ending, which comprises the steps of: calculating a cast blank length according to a formula that the cast flow length=(theoretical molten steel casting quantity*cast blank contraction coefficient) / (T*W*7.85); then figuring out the mass of a produced cast blank according to the cast blank length; and finally, subtracting the mass of the produced cast blank by the total mass of the cast molten steel to obtain the mass of surplus molten steel in a large tank, i.e. controlling the casting time according to the mass of the surplus molten steel. The method is simple in operation; according to the method, the mass of the surplus molten steel can be rapidly known, slag is prevented from roughing at the last casting stage of the large tank, the requirement on continuous casting production is greatly met, the quality of finished products is high, and the enterprise benefit is improved.

Description

technical field [0001] The invention relates to a control method, in particular to a control method for steel casting. Background technique [0002] At present, due to the failure of the weighing equipment on the rotary table of the molten steel tank during the continuous casting pouring process, during the pouring process of the large tank, the on-site operator’s judgment on the end of the pouring of the large tank mainly depends on the pouring time, but due to the There are certain differences in the molten steel quality of different molten steel tanks among different heats. At the same time, during the continuous casting process, abnormal conditions such as temporary speed change operation, water port change, and leakage prediction often occur. Changes directly lead to inaccurate judgment of the end point of pouring steel in large tanks based on time. In the actual production process, the phenomenon of leftover steel in large tanks or slag in large tanks often occurs. F...

AI Technical Summary

Problems solved by technology

For the phenomenon of remaining steel in the large tank, it will lead to an increase in the loss of steel materials and reduce the yield of finished products; for the slag in the large tank, the oxidative converter slag will cause secondary oxidation in the tundish, which will promote the loss of Als in molten steel and increase the yield of steel. Al in water 2 o 3 The content of inclusions not only blocks the submerged nozzle, but also directly reduces the cleanliness of molten steel, increasing the probability of defects such as product inclusions and cracks