The invention discloses a preparation process of a low-carbon high-
silicon silicon-
manganese alloy, comprising the following steps: (1) accurately proportioning
blue carbon, silica, and electrolytic
manganese metal, and mixing the prepared raw materials to ensure uniform distribution of each component; (2) gradually adding the uniformly mixed raw materials into a submerged arc furnace through a feeding device, starting the submerged arc furnace, heating up, and completing the
smelting of the low-carbon high-
silicon silicon-
manganese alloy at high temperature to obtain an
alloy liquid; (3) discharging the alloy liquid through a
slag separation device, and then slowly discharging the alloy liquid out of the furnace, into a
casting mold, and cooling to form a low-carbon high-
silicon silicon-manganese alloy
ingot; (4) finishing the alloy
ingot, crushing, packaging, and warehousing, and completing the preparation of the low-carbon high-
silicon silicon-manganese alloy. The low-carbon high-
silicon silicon-manganese alloy prepared by the invention has a silicon content of ≥72%, a manganese content of ≥22%, an
iron content of <2.3%, and a carbon content of <0.08%, and can be used for the refining of high-end low-micro carbon
ferromanganese.