5000 series aluminum alloy slab ingot added with waste materials in high proportion, preparation method of 5000 series aluminum alloy slab ingot and aluminum material

The invention discloses a 5000 series aluminum alloy slab ingot added with waste materials in a high proportion, a preparation method of the 5000 series aluminum alloy slab ingot and an aluminum product, firstly, raw materials for preparing the slab ingot comprise pure aluminum waste materials, other pure metal ingots except pure aluminum and intermediate alloy, the pure aluminum waste materials comprise 60-100% of waste materials and 0-40% of pure aluminum materials, and the waste materials comprise first-level waste materials, second-level waste materials and third-level waste materials according to a certain proportion requirement; attached impurities such as oil stains and paint on the surface of the waste are removed through a low-temperature pretreatment process; in the casting process, two times of refining are adopted, the purity of a melt is improved, the quality of a slab ingot is guaranteed, and the Ti content in the melt needs to be controlled to be smaller than or equal to 80% of the target Ti co