The invention relates to a multi-source iron-containing
solid waste cold
solid ball and a preparation method, and belongs to the technical field of
solid waste treatment. The cold bonding ball comprises the following raw materials in parts by weight: 40-70 parts of iron-containing dust mud, 15-40 parts of a secondary
metal material, 1-5 parts of a binder and 5-12 parts of a liquid modifier. A consolidation
system with continuous and reasonable
gradation is formed by utilizing pore filling of the fine-grained iron-containing dust mud and an aggregate bridging effect of the coarse-grained secondary
metal material, so that the compactness and the
compressive strength are improved;
chloride ions in high-
salinity wastewater are used for modifying raw materials, oxidation
phase change of
metal iron and low-valence
iron oxide in a secondary metal material is promoted, a high-strength binding phase is generated, the
compressive strength of the
pellets is effectively improved, co-treatment of
wastewater and multi-source solid waste is achieved, and under the condition that the cost of a binding agent is not additionally increased, the cost of the binding agent is reduced. And the cold consolidation strength of iron-containing solid wastes with different components is improved.