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Method for enhancing acid pickling efficiency of stainless steel tubes

A stainless steel tube and pickling technology, applied in the field of stainless steel tube pickling, can solve the problems of insufficient pickling, easy to produce dead corner pickling, affecting the pickling effect, etc., to enhance environmental benefits, reduce acid mist emissions, and enhance pickling. effect of effect

Inactive Publication Date: 2017-03-22
TAIYUAN IRON & STEEL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the uniqueness of pickling of steel pipes, pickling is generally carried out by hoisting the crane and feeding tank by tank. However, the large surface area of ​​steel pipes and the compact discharge method during pickling lead to dead angles and inadequate pickling, which affects pickling. Effect

Method used

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  • Method for enhancing acid pickling efficiency of stainless steel tubes
  • Method for enhancing acid pickling efficiency of stainless steel tubes
  • Method for enhancing acid pickling efficiency of stainless steel tubes

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Embodiment

[0028] Take the 50,000 tons stainless steel seamless steel pipe pickling system of Taiyuan Iron and Steel Co., Ltd. as an example to illustrate the present invention:

[0029] First transform the pickling tank equipment: the bottom of the pickling tank is set into an arc, and the arc at the bottom of the arc is 25 to 40 degrees; the acid tank both sides adopt movable support devices; There is a hydraulic cylinder, and the stainless steel pipe in the acid tank is adjusted to move up and down through the hydraulic cylinder.

[0030] Use the crane track 1 to lift the bundled stainless steel pipes 2 and send them to the arc-shaped bottom of the pickling tank. After the tank cover is sealed, acid solution is added for pickling. During the pickling process, the movable supporting devices on both sides of the acid tank start to move. At the end of the pickling, the acid liquid in the acid tank is automatically emptied. After the tank cover is opened, the steel pipe is lifted by the ...

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Abstract

The invention discloses a method for enhancing the acid pickling efficiency of stainless steel tubes. The method comprises the following steps of (1) acid pickling tank equipment modification, wherein the bottom of each acid pickling tank is arranged to be in an arc shape, and movable supporting devices are adopted on the two sides of an acid tank; and (2) an acid pickling process, wherein the procedures of carrying out feeding and acidification in sequence and carrying out acid discharge and uncovering in sequence are adopted, the acid mist discharge amount is greatly reduced, movement of the two ends of a crown block track is controlled in the acid pickling process, the two ends alternately move up and down, the process is repeated, acid liquor is disturbed by the steel tubes to form a turbulent flow state, the flow of an acid liquor circulation system is increased, the turbulent flow effect is enhanced, sludge accumulation in the acid tank is reduced, the acid liquor is cyclically heated through a heat exchanger, the temperature is automatically controlled, and the acid pickling efficiency is improved. According to the method, the acid pickling effect of the steel tubes is enhanced; the acid pickling efficiency is improved; and by means of an empty tank feeding and automatic acid discharge system, the acid mist discharge amount is greatly reduced, and environment benefits are enhanced.

Description

technical field [0001] The invention relates to a method for enhancing the pickling efficiency of stainless steel pipes, which belongs to the field of pickling stainless steel pipes. Background technique [0002] Due to the uniqueness of pickling of steel pipes, pickling is generally carried out by hoisting by crane and feeding tank by tank. However, the large surface area of ​​steel pipes and the compact discharge method during pickling lead to dead angles and inadequate pickling, which affects pickling. Effect. Contents of the invention [0003] In order to overcome the above disadvantages, the present invention aims to provide a method for enhancing the pickling efficiency of stainless steel pipes. During the pickling process, the arc structure at the bottom of the acid tank and the movable support device are used to ensure the uniformity of pickling, enhance the pickling effect, and improve the pickling efficiency. efficiency. [0004] The invention provides a method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/08C23G3/04
CPCC23G1/08C23G3/04
Inventor 王万江王立群王瑞柴晓军郭效斌张春晓毛兴国
Owner TAIYUAN IRON & STEEL GROUP
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