Method for preparing nano tungsten powder by using ammonium tungstate

The invention discloses a method for preparing nano tungsten powder by using ammonium tungstate. The method includes the steps that a powder body producing tungsten trioxide is taken and dissolved into dilute ammonia water to obtain an ammonium tungstate solution; the ammonium tungstate solution is in contact with and reacts with zinc salt in a high-pressure reaction kettle in order to obtain zinctungstate precipitation; and the zinc tungstate precipitation is subjected to reduction treatment to obtain the nano tungsten powder. The method utilizes the ammonium tungstate to prepare the tungsten powder, the nano tungsten powder can be prepared and obtained effectively, the discharge of wastewater and the consumption of hydrochloric acid can also be greatly reduced, and pollution of ammoniato the environment is effectively avoided. 本发明公开了利用钨酸铵制备纳米钨粉的方法，包括：取生产三氧化钨粉体溶解到稀氨水中，以便得到钨酸铵溶液；将所述钨酸铵溶液与锌盐在高压反应釜内接触并反应，以便得到钨酸锌沉淀；以及对所述钨酸锌沉淀进行还原处理，以便获得所述纳米钨粉。本发明利用钨酸铵制备钨粉，不仅可以有效制备得到纳米钨粉，而且还能大幅减少废水的排放量和盐酸的消耗量，并有效避免氨气对环境的污染。