Recovery processing method of leftover materials of container plate

Abstract

The invention discloses a recovery processing method of leftover materials of a container plate. The method comprises the following steps of: cutting or packaging and briquetting on the leftover materials of the container plates with different specifications, and proportioning and taking the leftover materials as smelting raw materials of the container plates; smelting; and adopting means of improving the final temperature of a converter, reducing the content of iron oxide of furnace slag, controlling the adding amount of lime, carrying out hyperphosphate control of a terminal point, controlling an iron-water ratio of the converter, accurately controlling nickel and copper components and the like. Therefore, less-slag smelting of the container plate is realized and the consumption of noble metal can also be reduced; and the smelting cost is reduced and huge economic benefits are brought to enterprises.

Description

technical field [0001] The invention relates to scrap steel processing technology, and more specifically, relates to a method for recycling and processing container board scraps. Background technique [0002] B480 weathering steel, also known as atmospheric corrosion-resistant steel, is widely used in the manufacture of structural parts such as containers, railway vehicles, and bridges. Cu, P, Cr, Ni and other alloying elements are usually added to improve the atmospheric corrosion resistance of steel. Cr can form a dense oxide film on the steel surface to improve the passivation ability of steel. Cu and P can be deposited between the rust layer and the substrate. A barrier layer is formed, which plays a better protective role. Considering the cost factor, some container manufacturers mainly use B480 weathering steel as the raw material for container production. [0003] Because in the process of producing containers, there will be scrap steel scraps such as edge wire and ...

AI Technical Summary

Problems solved by technology

[0003] Because in the process of producing containers, there will be scrap steel scraps such as edge wire and shearing materials, the phosphorus content of such scrap steel is high, about 900ppm, while the requirements for phosphorus in stainless steel products are all <400ppm, and due to the characteristics of stainless steel production technology, molten steel Difficulty in dephosphorization

Therefore, on the basis of the existing technology, stainless steel enterprises will not be able to use such scrap steel

However, when used on carbon steel, due to the high content of Cr, Ni, and Cu in this type of scrap steel, most carbon steel grades have strict requirements on the upper limit of Cr, Ni, and Cu elements (if Cr, Ni, and Cu elements are high It will seriously affect the welding performance of steel), so when using this kind of scrap steel, it is easy to produce carbon steel Cr, Ni, Cu trace elements exceeding the standard

[0004] To sum up, there are great difficulties in the recycling, processing and application of container scraps, which not only wastes a lot of resources, but also is not conducive to the cost management of enterprises

Images