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Chromium stainless steel pickling apparatus and its cooling method

A cooling method and stainless steel technology, applied in the field of chrome stainless steel pickling cooling, can solve the problems of poor stainless steel surface quality and so on

Active Publication Date: 2008-11-19
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the existing pickling and cooling methods for chromium stainless steel in the poor surface quality of stainless steel after pickling, the invention provides a pickling and cooling method for chromium stainless steel with good surface quality after pickling

Method used

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  • Chromium stainless steel pickling apparatus and its cooling method

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Embodiment Construction

[0009] The specific implementation of the chromium stainless steel pickling and cooling method is described below in conjunction with the examples and accompanying drawings, but the specific implementation of the chromium stainless steel pickling cooling method of the present invention is not limited to the following examples.

[0010] Firstly, the pickling cooling device used in this embodiment will be introduced. The chromium stainless steel pickling cooling device described in Fig. 1 comprises pickling tank 3, mixed acid circulation tank 29, heater 17, and the left side and the right side of pickling tank 3 are installed with rubber roller 1 and rubber roller 7 respectively, pickling tank 3 The acid removal port 4 of the acid removal valve 38 and the acid removal pipe 39 are connected with the acid inlet 37 of the mixed acid circulation tank 29, and the acid inlet 5 of the pickling tank 3 is connected with the acid removal pipe 6, the acid removal pipe 12 and the acid remova...

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Abstract

The present invention is chromium stainless steel pickling apparatus and its cooling method. The chromium stainless steel pickling apparatus includes a pickling tank, a mixed acid circulating tank and a heater connected through pipeline, and features that it is also provided with acid cooler with cooling water inlet, cooling water outlet, control valve on the cooling water outlet, upper part connected to the mixed acid circulating tank, and lower part connected to cooling acid pump connected also to the mixed acid circulating tank. The cooling method is that after the acid feeding pipe has temperature over 40 deg.c, the control valve in the steam inlet of the heater is closed and the acid solution is led with the pump to the cooler for being cooled to below 40 deg.c. The present invention has raised stainless steel pickling quality, lowered nitric acid, hydrofluoric acid and water consumption and reduced pickling cost.

Description

technical field [0001] The invention relates to a method for pickling and cooling chromium stainless steel. Background technique [0002] When producing SUS400 series, that is, pickling of chromium stainless steel finished products, the temperature of the pickling solution must be strictly controlled. If the temperature of the pickling solution exceeds 40°C during the pickling process, yellow flower marks will appear on the surface of the steel plate, which is called acid flower marks. The existing stainless steel pickling device includes a pickling tank, a mixed acid circulation tank, and a heat exchanger. Rubber rollers are installed on both sides of the pickling tank, and the acid removal port of the pickling tank is connected to the upper part of the mixed acid circulation tank with an acid removal valve. , the acid inlet of the pickling tank is connected with the upper part of the heater by the upper acid valve, the upper part of the mixed acid circulation tank is conn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G3/00C23G1/08
Inventor 张忠义李晨耀毛兴国岳效林
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD