The invention discloses a spiral inner wall
crucible furnace. The spiral inner wall
crucible furnace comprises a furnace body, a
hearth is arranged in the furnace body, a
crucible is placed in the
hearth, the top of the crucible is compressed and fixed through a gland, a
flame opening is formed in the position, close to the bottom, of the outer side of the furnace body, a burner is mounted on theflame opening, a spiral guide groove from bottom to top is formed in the
hearth along the wall surface of the hearth, a vertical exhaust channel is formed in the position, above the spiral guide groove, of the wall surface of the hearth, the top end of the exhaust channel communicates with the hearth, and the
tail end of the exhaust channel communicates with a connecting hole; and a leakage detection alarming opening communicating with the hearth is formed in the outer side of the furnace body. According to the spiral inner wall crucible furnace, the crucible
heating efficiency is improved, the dissolving speed is increased, the service life of a crucible is longer, the up-down temperature in the crucible is uniform, the defective rate of a product is increased,
waste heat can be recycledfor exhausting, the energy circulating efficiency is improved, the energy-saving effect is achieved, meanwhile, through design of the leakage detection alarming opening, the
safety coefficient of thecrucible furnace is increased, and the service life of the crucible furnace is prolonged.