Abstract: A structure for mounting a novel reaction tube is capable of following up the thermal expansion of the reaction tube without the need of hanging down the reaction tube in the apparatus for producing silicon. In a reaction unit in a reaction vessel body of the apparatus for producing silicon, there are provided a gas feed pipe for feeding chlorosilanes and hydrogen, a reaction tube for precipitating silicon, a high-frequency coil arranged on the outer circumferential side of the reaction tube to melt the precipitated silicon, a heat insulating material provided between the reaction tube and the high-frequency coil, and an intermediate wall provided at the lower portion of the reaction unit to support the heat insulating material. The reaction tube is supported on the upper surface of the intermediate wall.

Abstract: To provide a structure for mounting a novel reaction tube, which is capable of following up the thermal expansion of the reaction tube without the need of hanging down the reaction tube in the apparatus for producing silicon. In a reaction unit 3 in a reaction vessel body 2 of the apparatus 1 for producing silicon, there are provided a gas feed pipe 6 for feeding chlorosilanes and hydrogen, a reaction tube 7 for precipitating silicon, a high-frequency coil 11 arranged on the outer circumferential side of the reaction tube 7 to melt the precipitated silicon, a heat insulating material 9 provided between the reaction tube 7 and the high-frequency coil 11, and an intermediate wall 8 provided at the lower portion of the reaction unit 3 to support the heat insulating material 9. The reaction tube 7 is supported on the upper surface of the intermediate wall 8.

Abstract: To provide an apparatus for producing silicon capable of recovering silicon sufficiently in a recovery container even if the silicon deposited in a reaction container solidifies in the shape of an anthill. [Means for Solution] The apparatus for producing silicon has means for moving a recovery container 14 in a reaction container body 2. The moving means includes a support shaft 18 for supporting a bottom wall 14b of the recovery container 14 and a drive unit 17 for rotating the support shaft 18, which are provided for the recovery container 14. The support shaft 18 is deviated from the position of the center portion of the opening 7a on the lower end side of the reaction tube 7 so that the support shaft 18 suitably rotates at the time when the silicon is recovered in the recovery container 14 thereby varying the position on where the anthill is formed.