Intensive round hole hot blast stove grate positioning sand core and grate casting process

The invention relates to an intensive round hole hot blast stove grate positioning sand core which comprises a core head, the core head comprises a top head and a cylindrical core rod which are of an integrated structure, the core head is a single core head or a multi-connected core head, the bottom end of the cylindrical core rod is a cone, a positioning core is movably installed on a cylinder of the cylindrical core rod, and the positioning core is a single positioning core or a multi-connected positioning core. The positioning core and the ejector head are both of a regular hexagonal prism structure. The multi-connection core head is of a linear type one-piece core head structure formed by mutually connecting the side surfaces of the top heads among a plurality of core heads. The multi-connection positioning core is of a linear type integrated positioning core structure formed by connecting the side surfaces of a plurality of positioning cores. And the number of the core heads of the multi-connected core h