阅读说明：本技术 一种钼钨分离方法 (Molybdenum-tungsten separation method ) 是由 唐军利 于 2020-05-26 设计创作，主要内容包括：本发明公开了一种钼钨分离方法,首先取高纯度磁铁粉,加入到含钨的钼酸盐溶液中并进行混合,对溶液施加旋转磁场搅拌,激光测试溶液澄清后过滤即可得到纯净的钼酸盐溶液。本方法钼、钨分离效果好,钨的去除率可达90％以上,钼的损失低于5％；吸附在磁铁粉上的钨通过过滤与钼溶液分离,流程短、设备简单、成本低,适合大范围推广。(The invention discloses a molybdenum-tungsten separation method, which comprises the steps of firstly, taking high-purity magnet powder, adding the high-purity magnet powder into a molybdate solution containing tungsten, mixing, applying a rotating magnetic field to the solution, stirring, clarifying a laser test solution, and filtering to obtain a pure molybdate solution. The method has good molybdenum and tungsten separation effect, the removal rate of tungsten can reach more than 90 percent, and the loss of molybdenum is lower than 5 percent; the tungsten adsorbed on the magnet powder is separated from the molybdenum solution through filtration, the process is short, the equipment is simple, the cost is low, and the method is suitable for large-scale popularization.)

1. The molybdenum-tungsten separation method is characterized by comprising the following steps:

step 1, taking high-purity magnet powder;

and 2, adjusting the pH value of a molybdate solution containing trace tungsten, adding the magnet powder obtained in the step 1 into the molybdate solution, uniformly mixing, applying a rotating magnetic field to the solution, clarifying the laser test solution, and filtering to obtain a pure molybdate solution.

2. The molybdenum-tungsten separation method according to claim 1, wherein the purity of the magnet powder in the step 1 is more than 99.99%.

3. The molybdenum-tungsten separation method of claim 1, wherein step 2 comprises applying a rotating magnetic field to the solution after removing the rotor with a magnetic stirrer.

4. The method as claimed in claim 3, wherein the rotation speed of the magnetic stirrer is 800-1500 r/min.

5. The molybdenum-tungsten separation method according to claim 1, wherein the molybdate solution in step 2 is sodium molybdate or ammonium molybdate solution.

6. The molybdenum-tungsten separation method according to claim 1, wherein the mass ratio of tungsten/molybdenum in the molybdate in the step 2 is 0.078-0.51 mg/g.

7. The molybdenum-tungsten separation method according to claim 1, wherein the pH value of the molybdate solution adjusted in the step 2 is 8-11.

8. The molybdenum-tungsten separation method according to claim 1, wherein the adding amount of the magnet powder in the step 2 is 56-954 times of the mass of tungsten in the molybdate solution.

9. The molybdenum-tungsten separation method according to claim 1, wherein the time for applying the rotating magnetic field in the step 2 is 48-72 hours.

Technical Field

The invention belongs to the technical field of wet metallurgy, and relates to a molybdenum-tungsten separation method.

Background

Molybdenum and tungsten separation is a technical problem which puzzles molybdenum and tungsten metallurgical industry for many years, molybdenum and tungsten belong to the same subgroup of a periodic table of chemical elements, the properties are extremely similar, the ionic radii are close, the chemical properties such as complexing ability are also similar, and the molybdenum and the tungsten are difficult to be effectively separated.

Many methods have been reported and summarized for removing molybdenum from tungsten (ammonium tungstate, tungsten oxide, tungsten powder, etc.), but few methods have been reported for removing tungsten from molybdenum (molybdenum oxide, molybdenum powder, etc.). The tungsten has high melting point, and is difficult to remove from molybdenum powder and molybdenum products, and one method which is easy to realize is to remove tungsten from ammonium molybdate which is the front end, and the predecessor can remove tungsten from molybdenum, tungsten and S according to the ratio of molybdenum, tungsten and S^2-The method has the advantages that the method has certain effects, but has the defects of high molybdenum loss, poor separation effect and incapability of deeply removing tungsten.

Disclosure of Invention

The invention aims to provide a molybdenum-tungsten separation method which has the advantages of simplicity, convenience, no need of controlling temperature and pressure, good separation effect and low molybdenum loss.

The technical scheme adopted by the invention is that the molybdenum-tungsten separation method is implemented according to the following steps:

step 1, taking high-purity magnet powder;

and 2, adjusting the pH value of a molybdate solution containing trace tungsten, adding the magnet powder obtained in the step 1 into the molybdate solution, uniformly mixing, applying a rotating magnetic field to the solution, clarifying the laser test solution, and filtering to obtain a pure molybdate solution.

The invention is also characterized in that:

the purity of the magnet powder in the step 1 is more than 99.99%.

And step 2, removing the rotor by using a magnetic stirrer and then applying a rotating magnetic field to the solution.

The rotating speed of the magnetic stirrer is 800-1500 r/min.

The molybdate solution in the step 2 is sodium molybdate or ammonium molybdate solution.

In the step 2, the mass ratio of tungsten to molybdenum in the molybdate is 0.078-0.51 mg/g.

And (3) adjusting the pH value of the molybdate solution in the step (2) to be 8-11.

In the step 2, the adding amount of the magnet powder is 56-954 times of the mass of tungsten in the molybdate solution.

And (3) applying the rotating magnetic field in the step (2) for 48-72 h.

The invention has the beneficial effects that: the molybdenum-tungsten separation method has good separation effect, the removal rate of tungsten can reach more than 90%, the loss of molybdenum is lower than 5%, and meanwhile, the temperature and the pressure do not need to be controlled; the tungsten adsorbed on the magnet powder is separated from the molybdenum solution through filtration, the process is short, the equipment is simple, the cost is low, and the method is suitable for large-scale popularization.

Detailed Description

The present invention will be described in detail with reference to the following embodiments.

The invention relates to a molybdenum-tungsten separation method, which is implemented according to the following steps:

step 1, taking high-purity magnet powder, wherein the purity of the magnet powder is more than 99.99%, and the magnet powder is specifically ferroferric oxide;

step 2, adjusting the pH value of a molybdate solution containing trace tungsten to 8-11, wherein the mass ratio of tungsten to molybdenum in molybdate is 0.078-0.51 mg/g, then adding the magnet powder obtained in the step 1 into the molybdate solution, wherein the adding amount of the magnet powder is 56-954 times of the mass of tungsten in the molybdate solution, uniformly mixing, removing a rotor by adopting a magnetic stirrer, applying a rotating magnetic field to the solution, rotating the magnetic stirrer at the speed of 800-1500r/min, magnetically stirring for 48-72 h, clarifying the laser test solution, and filtering to obtain a pure molybdate solution;

the molybdate solution is sodium molybdate or ammonium molybdate solution.