Preparation method and application of low-density ceramsite proppant added with pretreated electrolytic manganese residues

The invention discloses a preparation method and application of a low-density ceramsite proppant added with pretreated electrolytic manganese residues. The low-density ceramsite proppant is mainly prepared from the following raw materials: pretreated electrolytic manganese residues and bauxite, wherein the mass fraction of the pretreated electrolytic manganese residues is 15-20%; the pretreated electrolytic manganese residues are obtained by calcining waste residues obtained after a process of extracting manganese metal through wet electrolysis for 2-3 hours at the temperature of 650-750 DEG C. The performance of the prepared low-density ceramsite proppant meets the SY/T5108-2014 industrial standard, the low-density ceramsite proppant can be used for replacing natural quartz sand to be used for fracturing operation under the closing pressure of 52 MPa, and the low-density ceramsite proppant is particularly used for hydraulic fracturing exploitation of shallow petroleum and natural gas. According to the prepar