Method for extracting tungsten from tungsten mineral by using soda and adopting high-pressure leaching process

The invention discloses a method for extracting tungsten from tungsten mineral by using soda and adopting high-pressure leaching process, comprising the following steps: adding soda and additives into primary tungsten autoclaving slag, carrying out secondary autoclaving at high temperature and pressure; separating the leaching solution from the slag; carrying out primary autoclaving to the tungsten by the leaching solution; separating the primary autoclaving slag from the crude sodium tungstate solution, wherein the primary autoclaving slag is used as the raw material; and mixing the tungstate with the secondary autoclaving leaching solution to prepare slurry. The liquid-solid ratio is controlled to be (3-5):1 in the step of adding the soda and the additives into the primary autoclaving slag and mixing to prepare the slurry, and the soda has the excess coefficient of 2.0-2.5. The liquid-solid ratio is controlled to be (3-5):1 in the step of mixing the tungstate with the secondary autoclaving leaching solution