Method for recovering tungsten from waste apt powder
A technology of crude sodium tungstate and ammonia distillation, which is applied in the field of tungsten smelting and production, can solve the problems of high processing cost, poor economic practicability, and increased production costs of enterprises, and achieve the goals of improving recovery rate, low production cost, and reducing consumption Effect
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Embodiment 1
[0050] Such as figure 1 Shown, the present invention provides a kind of method that reclaims tungsten from waste APT powder, and it comprises the following steps:
[0051] Step 1. Pump the crude sodium tungstate solution into the ammonia distillation kettle, stir at a stirring speed of 30r / min and raise the temperature to 85°C. The crude sodium tungstate solution here is the concentrated material; the volume of the added volume of the crude sodium tungstate solution is 50% of the internal volume of the ammonia distillation kettle, the tungsten concentration in the crude sodium tungstate solution is 100g / L, and the alkali concentration is 100g / L, wherein the alkali concentration is lower than 100g / L L, can be made up to 100g / L by adding additional solids (such as alkali sodium hydroxide);
[0052] Step 2. Add waste APT powder (APT is the abbreviation of ammonium paratungstate) to the ammonia distillation kettle, adjust the stirring speed to 50r / min, continue stirring for 2 hou...
Embodiment 2
[0057] Such as figure 1 Shown, the present invention provides a kind of method that reclaims tungsten from waste APT powder, and it comprises the following steps:
[0058] Step 1. Pump the crude sodium tungstate solution into the ammonia distillation kettle, stir and raise the temperature to 85°C at a stirring speed of 30r / min. material; the volume of the added volume of the crude sodium tungstate solution is 60% of the internal volume of the ammonia distillation kettle, the tungsten concentration in the crude sodium tungstate solution is 150g / L, and the alkali concentration is 120g / L, wherein the alkali concentration is lower than 120g / L L, can be made up to 120g / L by adding additional solids (such as alkali sodium hydroxide);
[0059] Step 2. Add waste APT powder (APT is the abbreviation of ammonium paratungstate) to the ammonia distillation kettle, adjust the stirring speed to 60r / min, continue stirring for 2 hours, then add hydrogen peroxide to the ammonia distillation ke...
Embodiment 3
[0064] Such as figure 1 Shown, the present invention provides a kind of method that reclaims tungsten from waste APT powder, and it comprises the following steps:
[0065] Step 1. Pump the crude sodium tungstate solution into the ammonia distillation kettle, stir at a stirring speed of 30r / min and raise the temperature to 85°C. The crude sodium tungstate solution here is the concentrated material; the volume of the added volume of the crude sodium tungstate solution is 55% of the internal volume of the ammonia distillation kettle, the tungsten concentration in the crude sodium tungstate solution is 125g / L, and the alkali concentration is 110g / L, wherein the alkali concentration is lower than 110g / L L, can be made up to 110g / L by adding additional solids (such as alkali sodium hydroxide);
[0066] Step 2. Add waste APT powder (APT is the abbreviation of ammonium paratungstate) to the ammonia distillation kettle, adjust the stirring speed to 55r / min, continue stirring for 2 hou...
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