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US 2006/0037437 A1Published application
Non-pollution process of extracting arsenic in vacuum and the equipment thereof
AssigneeBeijing Goldtech Co., Ltd.
InventorLuo Wenzhou
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AssigneeBeijing Goldtech Co., Ltd.
InventorLuo Wenzhou
Estimating the term…
A method of vacuum and pollution-free arsenic extraction, wherein increase the temperature of smelting chamber to 100-300° C. and then hold the temperature to remove the vapor and small quantity of dust in the arsenic concentrate; Under residual pressure50 Pa, increase the temperature of smelting chamber and crystallization chamber to 300-500° C. and then hold the temperature to remove the volatilized arsenic sulfides; Hold the temperature of crystallization chamber, increase the temperature of smelting chamber to 500-600° C. and then hold the temperature to remove the gaseous element sulfur decomposed; Increase the temperature of smelting chamber to 600-760° C. and then hold the temperature, lower the crystallization chamber temperature to 270-370° C. and then hold the temperature to get element arsenic; shutdown, lower the temperature, charge the air, stripe arsenic product and conduct deslagging, and extract fine gold using conventional method. This invention also provides devices for the above mentioned method, including induction heating equipment, smelting device, constant temperature crystallization device, automatic hydraulic deslagging device, dust collection device, automatic temperature control device, vacuum measuring device and vacuum extraction device. Through large-scale production experiments, this invention completely solves the arsenic pollution and safety problems long existed in the process of arsenic smelting, and simplifies the process.
A method of vacuum and pollution-free arsenic extraction involves the following steps in turn:
A system of vacuum and pollution-free arsenic extraction, its feature lies in inclusion of induction heating equipment, smelting device, constant temperature crystallization device, automatic deslagging device, dust collection device, automatic temperature control device, vacuum measuring device and vacuum extraction device. The above mentioned constant temperature crystallization device is fixed on the above mentioned smelting device through demountable device. Its interior smelting chamber is connected with the crystallization chamber of the above mentioned constant temperature crystallization device. Its bottom is connected with the above mentioned automatic deslagging device. The above mentioned smelting device, constant temperature crystallization device and automatic deslagging device have vacuum sealing in between. The above mentioned constant temperature crystallization device is connected with the above mentioned dust collection device through the dust collection inlet pipe. Such dust collection device is connected with the above mentioned vacuum extraction device through pipe equipped with the vacuum measuring device. Inductor on the above mentioned induction heating equipment is arranged on the above mentioned smelting device. The thermal couples of above mentioned automatic temperature control device are respectively mounted on the above mentioned smelting device and constant temperature crystallization device.
Dependencies are inferred from the claim text.