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Automatic pickling and passivating method for large stainless steel castings

A technology of pickling passivation and stainless steel, which is applied in the coating process of metal materials, etc., and can solve problems such as environmental protection failure, environmental pollution, and high labor intensity

Inactive Publication Date: 2021-04-27
江苏万恒铸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When pickling and passivating large stainless steel castings, due to the bulkiness of the castings, the manual lifting of pickling passivation, alkali neutralization, and repeated cleaning are labor-intensive. After treatment, the inner and outer surfaces have inconsistent brightness, color difference, low quality, and wastewater leakage The waste gas is diffused and discharged randomly, polluting the environment, and the environmental protection is not up to standard. The environmental protection department ordered to stop production

Method used

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  • Automatic pickling and passivating method for large stainless steel castings

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Embodiment Construction

[0021] The implementation process of this process is: preliminary preparation—determining the operation rhythm of the section—inputting the control program—starting device—lifting the workpiece—automated operation—pickling passivation—alkali neutralization—ultrasonic cleaning—cleaning with cold water, hot water, cold water—air drying;

[0022] The work content of the specific section is:

[0023] Do a good job in preliminary preparations, familiarize yourself with the specifications, sizes and weights of castings 14, and test the acid concentration of each pickling passivation pool; prepare and determine the operating rhythm of each section, and determine the translation, up and down running time according to the rhythm of each section;

[0024] Input the programmed program into the program control cabinet 1, command the running sequence, action process, and working time; turn on the power, start the pickling passivation equipment, waste water treatment system 10, and waste gas...

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Abstract

The invention relates to the casting industry, provides an automatic pickling and passivating method for large stainless steel castings, and mainly solves the problems that during pickling and passivating of the large stainless steel castings, due to the fact that the castings are heavy, the labor intensity of manual hoisting of all working sections is high, and waste water and waste gas pollute the environment. By applying the method, automatic equipment is designed, technological parameters of all sections of acid pickling and passivation, alkali neutralization and cleaning are reasonably determined according to the casting specification and the acid liquor concentration, a program is programmed and input into a touch screen of the equipment, and all the sections are instructed to operate according to the specified rhythm. Automatic operation is achieved, the production efficiency is high, the surface quality of castings after acid pickling and passivation is improved, waste water and waste gas are collected and treated and discharged after reaching the standard, and environment-friendly production is achieved.

Description

technical field [0001] The invention relates to the foundry industry. The pickling and passivation of stainless steel castings is carried out to make the inner and outer surfaces bright. In order to optimize and innovate the operation function of this process, a method for automatic pickling and passivation of large stainless steel castings is provided, which mainly solves the problem of large-scale stainless steel castings. During the pickling and passivation of stainless steel castings, due to the heavy castings, the labor intensity of manual lifting is high, the leakage of waste water and the diffusion of waste gas are difficult to concentrate on processing, polluting the environment, failing to meet environmental protection standards, and being forced to stop production. Apply this method to design automation equipment and waste water and waste gas centralized treatment system. According to the specifications of castings and the concentration of acid solution, reasonably de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/08C23C22/73
CPCC23G1/08C23C22/73
Inventor 张焕东宋帮鹍
Owner 江苏万恒铸业有限公司
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