Production technology of hot-dip galvanized steel strip for home appliance plate

Abstract

The invention relates to a production process of a hot-dip galvanized steel strip for household appliances, and belongs to the technical field of galvanized steel strip production in the metallurgical industry. The technical solution is: replace the solid degreasing agent with a liquid degreasing agent; use high-temperature radiant tubes in the annealing furnace, and increase the upper temperature limit to 1050°C; add a zinc ash removal device to the furnace nose process, and the frequency of zinc ash removal is not less than once a week; The surface of the sinking roll in the zinc pot process is sprayed and a sinking roll scraper is added; the top turning roll of the cooling tower is added with a cloth; the dry skinning is transformed into a wet skinning. The present invention produces galvanized products for household appliances by improving the ordinary galvanizing production process and equipment, which greatly saves production and equipment costs, significantly improves the added value of products, and the performance of hot-dip galvanized products meets the needs of ordinary household appliances. The final surface quality of hot-dip galvanized products reaches FB grade or above to ensure the surface quality of the products.

Description

technical field [0001] The invention relates to a production process of a hot-dip galvanized steel strip for household appliances, and belongs to the technical field of galvanized steel strip production in the metallurgical industry. Background technique [0002] Among the galvanized products, home appliance panels are medium and high-end products with relatively high added value. However, galvanized products for home appliance panels have higher requirements on surface quality and mechanical properties. In the existing technology, the general galvanizing production process is briefly described as follows: raw material decoiling→narrow lap welding machine→entry looper→alkali washing and degreasing (solid degreasing agent)→annealing furnace→furnace nose→zinc pot→air knife→cooling tower →(dry) skin pass machine→stretching and straightening machine→passivation drying→export looper→(oiling machine)→export shears→coiler. Ordinary galvanizing production equipment and processes ha...

AI Technical Summary

Problems solved by technology

Ordinary galvanizing production equipment and processes have high production costs, poor product performance, and the surface quality does not meet the requirements. It is impossible to produce home appliance board products or product quality cannot meet the needs of home appliances.

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