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Technical requirements for scrap steel in the metallurgical industry

Release time: 2019-10-11

Source: Jiangyin Yuanshi Heavy Industry machinery Co.,Ltd.

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Technical requirements for scrap steel in the metallurgical industry

  The steelmaking process is mainly to achieve “five de-monomation”, namely decarburization, dephosphorization, desulfurization, deoxidation, degassing inclusion and alloying. The metallurgical industry has put forward more detailed technical requirements for scrap steel.

  The sulfur and phosphorus content of a scrap steel shall not exceed 0.08%.

  bWar alloys, non-ferrous metals and other impurities shall not be mixed in scrap steel; non-alloy steels and low-alloy steels may be mixed together, but alloy scrap and pig iron shall not be mixed; alloy steel shall not be mixed with non-alloy steel, low alloy steel and Scrap iron; scrap steel must not be mixed in scrap iron.

  c There should be no mud, cement, sticky sand, rubber, etc. on the surface of scrap steel.

  d. Oil stains on the surface of scrap steel should be removed.

  e. Tubes, closed vessels, inflammable and explosive materials, radioactive and toxic materials that are closed at both ends are not allowed in scrap steel.

  f Complete sets of machinery and equipment and structural parts are not allowed in scrap steel.

  g Waste weapons must be technically checked and disposed of.

  It should be pointed out that the cleanliness and external dimensions of scrap steel are generally visually inspected, and chemical analysis can be carried out by taking samples in bulk delivery. When scrap steel is delivered in bulk, it should be classified according to its category and steel group. In particular, alloy scrap steel should be classified according to the classification criteria of 67 steel groups according to the provisions of GB/T4223-1996, which is not only conducive to the smelting of Taijin scrap, but also the alloying elements.

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