Method for preparing a fiber-based composite material for the manufacture of cast products, wherein one of the components, namely waste paper, which is one source of cellulose fibers, is dissolved in a hydro-breaker in an aqueous medium at a mass concentration of 1-1.5%, a second component is added, mixed, and a composite material is obtained, ready for molding cast products.
Sorted waste paper is used, and the second component is vegetable raw materials in the form of beer pellets, which are also dissolved in an aqueous medium before being added to the waste paper fiber mass, and they are a source of primary cellulose fibers and food industry waste