Aggregates Isolated from Ultrafine Tungsten Carbide Powder

The present invention provides a method for the separation of aggregates from ultrafine tungsten carbide powder. Specific steps are as follows:

1) The dispersing agent is added to the medium by sedimentation with ethanol or petroleum ether or ethylene glycol in a mixture of oleic acid composition, formulated as a solution settlement L1;

2) Then dispersed evenly 10min - 15min to make use of ultrasound;

3) Take over the settlement ultrasonic dispersion was poured into a container and sedimentation, respectively L1 separating tube, and the solution was poured into the container does not exceed 10% of the volume of the solution separated by settling tube, and the tube was poured into a solution of sedimentation separation account settlement L1 80% to 90% of the volume of the separation tube;

4) WC powder was added to the vessel to prepare a concentration of 20 ~ 25g / l solution of L2; L2 solution was dispersed using an ultrasonic ultrasonic 20min ~ 25min;

5) Then pour sedimentation separation tube and start timing;

6) The difference between the original WC powder having an average particle size, respectively, at different times after the start time of a continuous solution acess 5-8 seconds, and the remaining solution was collected one time;

7) Centrifuge the WC WC powder is separated from the solution containing the collected out at 70 ~ 80 ℃ vacuum dried for 2 to 3 hours to obtain non-agglomerated powder and a powder agglomeration.


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