Induction heating device and strip steel pickling system

Abstract

The invention relates to an induction heating device which comprises an inductor and a belt conveyor, the inductor is provided with an induction heating cavity, a strip steel inlet and a strip steel outlet, the strip steel inlet and the strip steel outlet are both communicated with the induction heating cavity and arranged on the two sides of the induction heating cavity respectively so as to define a strip steel running channel, and a belt moving path of the belt conveyor comprises a material bearing section. At the material bearing section, the belt penetrates through the induction heating cavity and is located under the strip steel running channel. In addition, the invention further relates to a strip steel pickling system. The induction heating device is arranged on the upstream of thestrip steel pickling device. The belt conveyor can rapidly take scale naturally falling off from the surface of the strip steel out of the induction heating cavity, and the scale is prevented from staying in a magnetic field and continuously heating to damage cavity insulation materials and other devices. The induction heating device is adopted to realize rapid heating of the strip steel before pickling, so that the subsequent pickling effect can be remarkably improved, the pickling time is shortened, and the energy consumption required by acid liquor heating is reduced; and high-speed stableproduction of the high-grade strip steel in a low-temperature environment is ensured.

Description

technical field [0001] The invention belongs to the technical field of metallurgical equipment, and in particular relates to an induction heating device and a strip steel pickling system equipped with the induction heating device. Background technique [0002] Hot-rolled strip steel needs to remove scale on the surface of the strip before hot-rolled finished products or cold-rolled annealing. The most common method for removing scale is to use acid corrosion to remove scale, which is called strip pickling, but the pickling process There are following problems in: [0003] In order to speed up the pickling process, it is necessary to heat the acid liquid, but due to the characteristics of the acid liquid, it is difficult to directly heat the acid liquid with an open flame or electricity, and the boiler can only be heated by natural gas or gas to generate steam or high-temperature heat-conducting oil, and then use these The medium heats the acid in the heat exchanger, which h...

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Problems solved by technology

[0003] In order to speed up the pickling process, it is necessary to heat the acid liquid, but due to the characteristics of the acid liquid, it is difficult to directly heat the acid liquid with an open flame or electricity, and the boiler can only be heated by natural gas or gas to generate steam or high-temperature heat-conducting oil, and then use these The medium heats the acid in the heat exchanger, which has low heating efficiency, high energy consumption, and environmental pollution

The hydrochloric acid used for strip pickling is volatile at high temperature. In order to protect the environment, a large amount of acid mist needs to be treated, resulting in an increase in production costs. At the same time, due to the limitation of the acid mist treatment process, there is still some acid mist in the treatment process. Inadequate treatment, resulting in environmental pollution

[0004] In the process of metallurgical production, there is a process of using electric induction heating to realize rapid heating of strip steel in processes such as heat treatment of strip steel, but the applicant found that when the strip steel passes through the induction heating device, the iron oxide scale on the surface of the strip steel will fall into the inductor , causing the inductor to continue to heat the oxide scales, the temperature of the oxide scales continues to rise and damage the insulating layer in the inductor, and even cause damage to the induction coil, and also cause loss of electric energy; and if broken before entering the induction heating device Lin method to remove scale, on the one hand, it is difficult to achieve a reliable scale removal effect, and it affects production efficiency, and has a certain impact on the surface quality of the strip, and on the other hand, it will also affect the resource recovery and utilization of scale after pickling

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