20G seamless tube continuous quenching is to better ensure the characteristics of the plate, pickling passivation is to ensure the surface quality. To a certain extent, it can ensure the use of 20G
Seamless Steel Pipe throughout the later stage. In the continuous quenching of 20G
Seamless Pipe and its pickling process, the pickling passivation section is the key component of the generator set. The acid management method is the key way to ensure the normal and smooth operation of the pickling passivation section, which is particularly important for the process performance of hot rolled strip and the effective use of acid. The basic core concept of acid management is to maintain the stability of the ion concentration of metal materials in the acid solution, so as to ensure the best and stable practical effect of pickling passivation.In specific production, for the mixed acid pickling passivation section, the mixed acid tank generally located in the middle and downstream of the production line will specify a lower ion concentration of the metal material to ensure the actual effect of the final pickling passivation. It has the ability to resist air and air oxidation, and also has the ability to corrode in substances containing acids, alkalis and salts, that is, corrosion resistance. However, the size of its corrosion resistance work capacity varies with the organic chemical composition of its steel, interactions, application standards and the type of natural environmental substances.In order to achieve this overall goal, first of all, according to the steel grade of hot-rolled strip, the amount of pickling passivation section per unit area, clarify the zinc ash composition of the surface layer of hot-rolled strip and the concentration value of the required acid, the acid intelligent management system will automatically carry out relevant measurements, clarify the amount of new acid added and waste acid consumption, and carry out relevant practical operations according to the PLC system. In addition, the acid concentration value is analyzed offline at regular intervals, and the acid discharge amount is adjusted relative according to the process performance and acid analysis results of the hot-rolled strip after pickling passivation.
