What classification knowledge is there for recycling scrap metal?

Waste metal recycling is divided into two categories: productive scrap metal and non-productive scrap metal. Produced scrap metal refers to metallurgy, machinery, chemical, construction, transportation, communications, electric power, water conservancy, oil field, national defense and other production. In the field, metal materials, metal products and production equipment that have lost their original use value in the production process, including running steel, slag steel, cutting head, edge, waste material, iron oxide scale, steel scrap, etc. Iron filings, scraps; scrap cast steel, cast iron parts, waste semi-finished products, waste parts, waste products, broken iron.

Non-productive scrap metal refers to the metal living utensils of urban and rural residents and enterprises and institutions that have lost their original value of use, and metal small-scale agricultural implements used by farmers for agricultural production, such as waste stoves, cookware, metal tableware, waste sewing machines, Bicycles, rickshaws and their waste parts, waste trowels, hoes, ploughs and scrap small food processing equipment, scrap metal daily necessities, miscellaneous items, waste toothpaste, non-ferrous metal waste pipes, etc.

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