Safe and environment-friendly metal continuous derusting method and device

Abstract

The invention relates to the field of metal derusting methods and derusting, and particularly relates to a safe and environment-friendly metal continuous derusting method and device. The method and device solve the key technical problem of environmental pollution and harm to the health of workers due to the fact that acid mist is easily volatilized by using a traditional chemical pickling liquid (rust remover) to derust, and meanwhile, the purpose of continuously derusting one by one of workpieces (a section of workpieces or a hang of workpieces arranged in a hanging tool basket) is achieved.According to the structure, the rust remover and the workpieces are sealed in a derusting working area and a sealing liquid when the equipment is in a working state, the situation that the environmentis polluted due to the volatilization of toxic and harmful gases in the rust remover is avoided. According to the device, closed schemes of closed areas are arranged on the front and back of the derusting working area; the closing is only one relative closed; the sealing liquid is used for sealing; the action of the sealing liquid is used for sealing the rust remover and steam and is not directlycontacted with a solvent; the situation that the sealing liquid and a acid washing liquid are mutually polluted is avoided; and in addition, the sealing liquid communicates with the atmosphere, so that the danger of explosion caused by overlarge steam pressure of the chemical pickling liquid in the device is avoided.

Description

technical field [0001] The invention relates to a metal rust removal method and the field of rust removal, in particular to a safe, environment-friendly and continuous metal rust removal method and device. Background technique [0002] The process of derusting and descaling treatment of steel surface is a necessary pretreatment process of steel surface before drawing, cold rolling, hot-dip plating, vacuum plating, electroplating, phosphating, oxidation, painting, etc. At present, the metal derusting and descaling method widely used in the market is pickling. A large amount of sulfuric acid, hydrochloric acid and other acid liquids are used in the pickling and derusting treatment, which produces a large amount of acid mist and waste water, which has caused serious harm to the environment. In recent years, an environmentally friendly ultrasonic derusting technology has appeared on the market. It has attracted people's attention because it has no acid mist volatilization and i...

AI Technical Summary

Problems solved by technology

A large amount of sulfuric acid, hydrochloric acid and other acid liquids are used in the pickling and derusting treatment, which produces a large amount of acid mist and waste water, which has caused serious harm to the environment

In recent years, an environmentally friendly ultrasonic derusting technology has appeared on the market. It has attracted people's attention because it has no acid mist volatilization and is harmless to the human body. However, it has two disadvantages: 1. For leather, ultrasonic waves are necessary, and the power of ultrasonic waves is high, and the noise will affect the entire factory

2. The descaling time of the ultrasonic descaling liquid is long and the effect is poor, generally at least 10 minutes, which is not suitable for the production of continuous descaling of large quantities of steel strips. 3. After the ultrasonic descaling liquid is used for a period of time, the iron ions After reaching a certain amount, it is easy to agglomerate. Once agglomerated, the whole tank is jelly-like, and it is very troublesome to clean up. Moreover, the complexed iron ions cannot be separated, and it is difficult to regenerate the rust removal solution. Therefore, this technology scares users Yes, as long as you hear about ultrasonic rust removal, you will be afraid!

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