Patent ID: 7534389

Claim:
A system of vacuum and pollution-free arsenic extraction, comprising: a smelting device; a constant temperature crystallization device, fixed on the smelting device through a demountable device, wherein an interior smelting chamber of the smelting device is connected to a crystallization chamber of the constant temperature crystallization device so that arsenic vapor generated from ore concentrate in the smelting device can crystalize in the crystallization chamber and produce arsenic; an automatic deslagging device, connected to a bottom of the smelting device so as to conduct deslagging, wherein the smelting device, the constant temperature crystallization device, and the automatic deslagging device each have a vacuum sealing in between; a dust collection device, connected to the constant temperature crystallization device through a dust collection inlet pipe; a vacuum measuring device and a vacuum extraction device, the vacuum extraction device being connected to the dust collection device through a pipe equipped with the vacuum measuring device to measure a system vacuum degree, so that arsenic sulfides volatilized from the ore concentrate in the smelting device are drawn into the dust collection device through the crystallization device by the vacuum extraction device; induction heating equipment, having an inductor arranged on the smelting device, so as to heat the smelting device and the crystallization device to predetermined temperatures; and an automatic temperature control device, having thermal couples respectively mounted on the smelting device and on the constant temperature crystallization device, so as to control the temperatures of both devices.