Intelligent control method of kr desulfurization lifting trolley system

Abstract

The invention discloses an intelligent control method of a lifting trolley system of knotted reactor (KR) desulfurization. The intelligent control method comprises the following steps: controlling the lifting trolley system by using a KR desulfurization control system to descend to a stirring position; controlling a clamping device to press a guide rail tightly to fix a lifting trolley, rotating a stirrer, adding a desulfurizing agent and gradually increasing the rotating speed of the stirrer to reach a set working speed value; after the stirring time reaches the set value, reducing the rotating speed of the stirrer to be two thirds of the working speed, loosening the clamping device and starting a winding plant so as to enable the lifting trolley to ascend to a slag throwing position; fixing the lifting trolley by using the KR desulfurization control system, rotating the stirrer until the set upper limit speed is reached and maintaining for a period of time; and after the rotating time reaches the set value, stopping a stirring device, loosening the clamping device and lifting the lifting trolley to a standby position. By the intelligent control method, fully-automatic control of the lifting trolley system can be realized, blades of the stirrer carries few slags, even no slag during normal production, production continuity is guaranteed, and production period is shortened.

Description

technical field [0001] The invention relates to the technical field of control technology for desulfurization (KR desulfurization) by a mechanical stirring method in a steelmaking process in the metallurgical industry, in particular to an intelligent control method for a KR desulfurization lifting trolley system. Background technique [0002] KR desulfurization is an important means to optimize the technological process in the modern iron and steel industry. It has the advantages of deep desulfurization capacity, low desulfurization energy consumption, and short smelting cycle. It is an excellent choice for smelting high-quality steel and is deeply loved by various steel mills. Its basic method is to use a three-leaf or four-blade agitator poured with a refractory material lining, insert it into the molten iron tank at a certain depth below the molten iron level, and rotate and stir to make the molten iron vortex, and put the quantitative desulfurizer on the surface of the mo...

AI Technical Summary

Problems solved by technology

At present, the control method of the lifting trolley system has the following problems: most of the equipment such as lifting trolleys is manually controlled by the computer, that is, the operator controls the lifting trolley system step by step according to the process. Manual operation greatly increases the labor intensity of the workers and is easy Cause production accidents, prolong the production cycle, increase the temperature difference of molten iron before and after desulfurization, and adversely affect the next steelmaking process; after the molten iron is stirred, there is a thick layer of molten iron slag floating on the surface of the molten iron. When lifting, accumulations will form on the blades of the agitator. Often after several tanks are processed, the slag on the blades will be as high as 300~400mm. The vortex brings in the molten iron, which increases the consumption of desulfurizer and accelerates the corrosion of the refractory material of the mixing head. At present, the online slag scraping device is not ideal, and the slag can only be manually scraped offline, which seriously affects the production progress.

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