The invention relates to a pressure-flow-type
magnesium alloy smelting heat insulating furnace which comprises a furnace body provided with a heat insulating layer, a
crucible arranged inside a
hearth, a
heating element, a temperature measuring device and a furnace cover, wherein the furnace body comprises a furnace shell and a furnace liner; a water-cooling
flange is arranged at a position where the upper part of the furnace body is matched with the furnace cover, and internally provided with high temperature resistant and fire-resistant filler material and a
silicon rubber sealing ring; the water-cooling
flange is internally filled with circulating cooling water; the furnace cover is locked with the furnace body by a compressing mechanism; a temperature
thermocouple and a protection gas input pipeline extend into the furnace through inserting holes of the furnace cover, a
pressure release pipe is arranged on the furnace cover, and the top of the
pressure release pipe is provided with a
safety valve and an
exhaust valve; and a transfer
pipette is introduced into the
hearth through the furnace body. The furnace integrates the functions of
smelting, heat insulating and melt transmission, accurately controls the flow rate of
magnesium alloy melt, extracts the purer
magnesium alloy melt at the middle part of the
crucible, realizes continuous transmission with fixed flow rate, and prevents oxidation and
combustion of the
magnesium alloy. Furthermore, by combining corresponding
foundry equipment, the
magnesium alloy product with high quality can be prepared, and the equipment can be safe in use as well as simple and convenient for operation.