Abstract: In steel industries the hot rolled steel coil requires pre-treatment before undergoing various other processes like cold rolling, galvanising etc. This pre-treatment is aimed to remove various oxide layers, rust or scale and other impurities from the steel surface by passing the work piece through the vat of pickle liquor. The pickling process generates large amount of pickling sludge which contains acidic rinse water, dissolved metal salts of iron, iron chloride, zinc and waste acid. The spent pickle liquor is considered a hazardous waste as per Indian Standards. In this paper we have completely reviewed the treatment of stainless steel, also discussed about the traditional methods for treatment of spent pickle liquor, regeneration of acid and utilization of waste sludge.
Keywords: Pickling process, acid regeneration, traditional treatment methods, pyrohydrolysis, neutralization, diffusion dialysis.
Title: A Review on Regeneration Process of Waste Pickling Acid at Steel Industries
Author: Aditya Agrawal, Navneet Naman, Sanjeev Kumar Dubey
International Journal of Engineering Research and Reviews
ISSN 2348-697X (Online)
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