a few possibilities to explore:

1. WS TYLER CO in StCatharines, ONtario: may be able to help here with a v85 hummer screen which will separate fines up to 500 mesh. they would need more sieve gradation type of information to calculate size needed. This company has been in business about 100 years and has a vast amount of experience.

LINK: http://www.wstyler.ca/vibratingscre...ng-systems.php

2. Rotex: may be able to size equipment for this powder, to be confirmed by their app experts.

3. a company in ISRAEL.....can not remember the name unfortunately....can do very very fine screening.

4. air separation devices are available, but i do not know enough to help here.

George Baker - Moderator

Originally Posted by knsanthosh

Dear Sir,

Which is the best solution to classify zinc powder to finer products of ASTM 325#, Dry sieving or air classification or any other cost effective method?

For air classification is there any specific equipment to be used to get 100 % particle passing 325#. My feed is 200# ( 100 % particles passing through 200#)

Regards,

KNS

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Dear KNSANTHOSH,

You did not provide enough info to get a qualified answer.

1] what capacities are you talking about?

2] what is the form factor of your feed, it will have impact on picking the right solution too..

3] How much 325# you have in your feed? (if it is less then 30%, air classification will not be efficient, even our air classifiers😀)

4] are you interested in separation/sieving only or you want/need to grind the feed to 325# as much as possible?
5] moisture level?

the name of the israeli company is kroosh btw

kind regards

ezryakkerman

cyclotec.net

cyclotec@cyclotec.net

 

Originally Posted by knsanthosh

Dear Sir,

Which is the best solution to classify zinc powder to finer products of ASTM 325#, Dry sieving or air classification or any other cost effective method?

For air classification is there any specific equipment to be used to get 100 % particle passing 325#. My feed is 200# ( 100 % particles passing through 200#)

Regards,

KNS

■

Dear KNSANTHOSH,

We have experience of separation of SS metal powder, at feed capacities of 250 kg/h, (our main operation is classifiying minerals at capacities up to 20-40 t/h).

Zinc has tendency for clogging(maybe there will be a need for using surfactants), and there is fire hazard in case of contact with moisture, so in day to day production there MIGHT be a need for inert gas environment.

But as a principle because of its density it will separate quite efficiently

KR

EzryAkkerman

cyclotec@gmail.com

Originally Posted by knsanthosh

Thanks for the reply. My answers to the questions are added.

1] what capacities are you talking about?

Ans: Initially the feed rate may be 8MT /day

2] what is the form factor of your feed, it will have impact on picking the right solution too..

Ans: Atomised powder

3] How much 325# you have in your feed? (if it is less then 30%, air classification will not be efficient, even our air classifiers)

Ans: Feed is having 80-85% particles passing through 325#

4] are you interested in separation/sieving only or you want/need to grind the feed to 325# as much as possible?

Ans: Since this is metal powder, milling may not be possible. So cost effective separation/sieving has to be used

5] moisture level?

Ans: At the generation stage of powder moisture is very very low

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Dear KNS,

Please forward your details to your local Rotex representative to allow him to contact you to discuss the application. You may send your details to me as an alternative. I will then make sure that your local contact gets in touch with you. ■

Dear knsanthosh,

If you decide to classify zinc powder with air classifier, we would be happy tp help

KR

Ezry Akkerman

Cyclotec Oy

cyclotec@gmail.com ■

Dear Knsanthosh,

We have a customer classifying CrO2 p90-95=20 micron at capacity of 250 kg/h with 1 ton/hour classifier (CrO2 is reported to be very sticky material).

You can send sample to be tested in our lab

"Any indian agent or dealer available?" NO, NOT YET

KR

Ezry Akkerman

Oy Cyclotec ltd

cyclotec@gmail.com ■

Dear KNS,

Without testing, yet to be on the safe side I would say it would be over 50% yield (could go up to 60%)

D50 in classification is not under control. D50 you get what you have in the PSD of the feed, since you do not mill.

KR

Ezry Akkerman

Cyclotec Ltd

cyclotec@gmail.com

Originally Posted by knsanthosh

Zinc powder is having a bulk density of 3.3-3.5 g/cc . Whether classification is economically feasible for this powder.

Feed: 85-90 % particles less than 325#,70-80% particles <400# and d50~15-18 microns

product-1 target <325#:100%, d50:9-11 microns

product 2 target <400#:100%, d50:6-9 microns

What would be the yield of finer product in each case?

Regards,

KNS

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