Strip steel pickling system with spraying system

Abstract

The invention discloses a strip steel pickling system with a spraying system. The strip steel pickling system with the spraying system comprises a strip steel pickling device and a control system connected with the strip steel pickling device. A field programmable gate array (FPGA) processor, a power supply circuit, a storage circuit and a signal processing circuit are arranged in the control system. The FPGA processor is connected with the power supply circuit, the storage circuit and the signal processing circuit. The signal processing circuit is connected with the strip steel pickling device. Strip steel is pickled by combining the spraying system with a turbulent flow system so that the surface state of the surface, in an acid tank, of a steel plate can be improved, iron oxide skin on the surface of the steel plate can be fully pickled, no iron oxide skin exists on the surface of the pickled steel plate, the surface of the plate is bright, and the quality is stable; in addition, the intelligent control system is used for controlling the pickling process and the fluidity of acid liquor in the pickling tank, the pickling process and the operation of the strip steel are managed synchronously, and the strip steel is pickled optimally.

Description

technical field [0001] The invention relates to the technical field of coil and steel strip production, in particular to a strip steel pickling system with a spray system. Background technique [0002] In the cold rolling mill, the currently used push-pull pickling line is four-slot shallow-slot turbulent pickling, two-stage hot water rinsing unit, the strip production speed of the unit is 50-100 m / min, and is used for pickling ordinary carbon. Plain steel plate, after pickling, the surface of the steel plate is required to be free of scale, bright and of stable quality. Now that the market demand has changed, this unit cannot meet the quality requirements of steels whose oxide scales on the pickling surface are difficult to remove. For example, the current production of oriented silicon steel is increasing, and the push-pull pickling line, which only pickled ordinary carbon steel plates, now needs to pickle oriented silicon steel. However, due to the unreasonable structura...

AI Technical Summary

Problems solved by technology

Now that the market demand has changed, this unit cannot meet the quality requirements of the steel that is difficult to remove the oxide scale on the pickling surface

For example, the current production of oriented silicon steel is increasing, and the push-pull pickling line, which only pickled ordinary carbon steel plates, now needs to pickle oriented silicon steel. However, due to the unreasonable structural design of the push-pull pickling line, especially the lack of spraying devices , resulting in the following problems in the use of the push-pull pickling line: First, the oriented silicon steel strip can be soaked in the pickling working solution only in the middle of each tank, and the strips at both ends must be pulled up and pass through the wall to enter the next In the acid tank, the part of the steel strip that was pulled up could not be fully soaked, and the oxide scale on the surface of the steel plate was not completely removed

Second, because the structure of the oxide scale on the surface of oriented silicon steel is different from that of ordinary carbon steel plates, and the bonding density of the oxide scale and the base metal is different, the pickling effect of oriented silicon steel after pickling is obviously worse than that of ordinary carbon steel. On the surface of the plain steel plate, the speed of the unit is slowed down to 40 m / min, and there are still residual iron scales on the surface, which directly affects the grade rate of the finished oriented silicon steel product.

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