Re: Disperser / Mixer For Slurry
To discover the most efficient method for rapid powder/liquid dispersions, go to www.semi-bulk.com to review the VACUCAM(R) Slurry Processes.
e-mail calack@semi-bulk.com to discuss powder/liquid mixing in greater detail.
Regards, ■
Re: Disperser / Mixer For Slurry
Hello Joe,
I like to invite you to visit our website http://www.jacmor.com.au.
We are the designer and manufacturer of high quality equipment made to customer specification.
We already have produced successfully similar equipment you require for some water treatment plants and liquid waste plants here in Australia without having to build a laboratory unit first.
Email us what exactly you want to get done with that mixer and we will quote you how much it will be and when you can have it.
Regards,
Werner
JACMOR ENGINEERING ■
Re: Disperser / Mixer For Slurry
Hi Joe,
the Eirich blunger mixers type RL are well introduced into the market for the dispersion of hard to disperse materials. The advantage are the extremly high shear forces, which can be introduced into the product.
For more informations contact our sister company
Eirich Machines Inc.
4033 Ryan Road
Gurnee, Illinois 60031
phone +1 - 847 - 3362444
fax +1 - 847 - 3360914
eMail : eirich@eirichusa.com
www.eirichusa.com
They will be happy to provide you with more detailed informations.
Stefan Gerl
stefan.gerl@eirich.de ■
Re: Disperser / Mixer For Slurry
Hi Joe,
I think we might have the right solution for you in lab as well as in production scale. Equipment for testing is available.
Please send me your address details so that we can get the necessary information to you.
Looking forward to hear from you I remain with my best regards,
Andreas
(andreas.niens@kinematica.ch)
Originally posted by Joe
Hi there,
I am not sure whether I placed the question in the right section of the Forum, but I need some information to Mixers for Slurry production.
Target is to produce a Slurry with 75 -78% solids content with CaCO3 Powder (98% < 3Micron, 90% < 2Micron) and Water plus of course some Additives. Due to the ultrafine powder we need a very good dispersion, probably with high shear forces, to avoid or break up agglomerates.
The information I need is what kind of Mixer / Mixer-Blades is/are best for mixing and dispersing. We first will do laboratory trials before investing in production machines. This means this typ of Mixer should be available as a laboratory unit as well as a production machine.
I would appreciate any infomation.
Thanks
Joe
■
Powder Dispersion
Hello Joe,
the ultrafine dispersion of powders into liquids is not difficult, if you are using the right equipment.
Addition into the vessel on the liquid surface is the wrong way. Your ultrafine powder may have a specific powder surface of 4 m per gram. One bag with 25 kg has 100000m surface to wet. Your liquid may have a surface of 2 m to fill the powder in. You can imagine the liquid will never reach every single particle. The liquid will always catch and encapsulate a lot of particles. That means you will get agglomerates. Destroying these agglomerates later is not only ineffective, it takes time and is sometimes not very successful.
You have to avoid agglomerates when you add the powder. The liquid surface during addition of powder has to be enlarged a few thousand times and the addition of powder must be done under high shear.
On our webpage you find a machine called Conti-TDS. (http://www.ystral.com/Englisch/Machi...conti-tds.html) The machine on the picture is a Conti-TDS-4, which is able to induct and disperse up to 400 kg CaCO3 per minute. With this machine we achieve particle size distributions of 0,61 µm directly after powderinduction with Titaniumdioxide. With Silica or Aluminiumoxide we get in the range of 0,1 µm. So your 2-3 µm should be no problem.
If you need more information please see our webpage or contact us per e-mail.
Best Regards
Hans-Joachim Jacob ■
Re: Disperser / Mixer For Slurry
Dear Joe,
We have experence processing CaCO3 to meet your objectives.
What type of CaCO3 is this?
How much do you need to process and how fast?
What is your end use?
Dave Pagor ■
Re: Disperser / Mixer For Slurry
Hi, to introduce myself, I have been associated with the design, manufacture, installation and site activity aspect of Kemutec Gardner process mixing machinery in excess of 30 years.
If agglomerates were not an issue, this would be an ideal application for a horizontal mixer with either an interrupted spiral, or paddle type agitator. However, since agglomerates are likely to form, then without doubt you are correct in your assumption that a high speed plough type agitator would be preferable. This type of mixing agitator works on the basis of division and high shear. Further de-agglomeration, if required can be achieved with the addition of separate high speed intensifiers.
We have a 160 litre working capacity test mixer and would be happy to assist with your investigation. In addition, we can supply machines from laborartory scale to 10,000 litres working capacity and above if required.
I hope this helps, and if I can be of further help, please get in touch,
Best regards,
Mike ■
Re: Disperser / Mixer For Slurry
To answer your questions:
Originally posted by Dave Pagor
What type of CaCO3 is this?
GCC (Ground Calcium Carbonate, Calcite)
PSD: 98% < 3Micron, 87-90% < 2Micron, 50% < 1Micron
Originally posted by Dave Pagor
How much do you need to process and how fast?
During our lab trials there are no time requirements and the capacity should be something like 10 - 100kg
Originally posted by Dave Pagor
What is your end use?
Paper Industry
Thanks
Joe ■
Re: Disperser / Mixer For Slurry
Joe,
It won't change this very much but if this is for the paper industry, is this PCC?
We have a number of installations producing material to the spec's you are requesting. Please contact us at
djp@cbmills.com
we can discuss further.
CB Mills
DavePagor ■
Re: Disperser / Mixer For Slurry
Joe,
The 75% solids... is by weight or by volume.
In my opinion, to wet and disperse 100 Kg of fine powder can represent some issues with respect to time.
May be that the type of blade used is not as important as the powder adding process.
Depending on the final viscosity of the slurry, it may be economical as well as practical to circulate the slurry while adding the powder and continuously agitating.
Antonio Reis
Vitrom Mfg Consultants
Your Process and Manufacturing Solutions
Phone: 209.834.1900
Fax: 209.834.1039
www.vitrom.com ■
Re: Disperser / Mixer For Slurry
CaCO3 dispersions are quite common, however depending on the formulation and raw marterial specifications dispersion difficulty can vary.
My initial recommendation is to begin with a simple high speed disperser. These units are very common and likely at your disposal. Blades play a very import role in high speed dispersion. DisperseTech offers a broad range of dispersion blades.
I would start with a standard F (sawtooth) blade. This is the most common of the dispersion blades due to its combination of high shear and pumping capacity. If dispersion quality is insufficient, I would move to one of their ring blades, specifically the CSI blade Constant Shear impeller. This is a superior dispersion blade but is more costly due to its fabrication.
Other blades can be selected to increase flow etc. if necessary. Dispersetech has alot of information on their site concerning high speed dispersion configuration.
If the dispersion cannot be met on a single shaft high speed disperser, you may need to investigate mutli shaft machines or media mills.
If you have questions on these let me know and I will attempt to help.
Stephen T. Schmidt
VP Equipment & Engineering
E.W. Kaufmann Company
Keystone Industrial Park
140 Wharton Rd
Bristol, PA 19007
Office: 215-364-0240 X 109
Direct: 267-983-1663
fax: 866-741-3827
email: sschmidt@ewkco.com
Website: www.ewkaufmann.com ■
Re: Disperser / Mixer For Slurry
Joe,
You should check out the Vacucam(R) Ejector Mixer for the most efficient mixes.
www.semi-bulk.com.
The company has a pilot plant and uses CaCO3 for typical demonstrations. Please call to discuss your application in more details.
Charles Alack,President
Semi-Bulk Systems, Inc.
159 Cassens Court
Fenton, MO 63026
ph: 1-800-343-4500 X115
e-Mail: calack@semi-bulk.com
web: www.semi-bulk.com ■
Disperser / Mixer for Slurry
Hi there,
I am not sure whether I placed the question in the right section of the Forum, but I need some information to Mixers for Slurry production.
Target is to produce a Slurry with 75 -78% solids content with CaCO3 Powder (98% < 3Micron, 90% < 2Micron) and Water plus of course some Additives. Due to the ultrafine powder we need a very good dispersion, probably with high shear forces, to avoid or break up agglomerates.
The information I need is what kind of Mixer / Mixer-Blades is/are best for mixing and dispersing. We first will do laboratory trials before investing in production machines. This means this typ of Mixer should be available as a laboratory unit as well as a production machine.
I would appreciate any infomation.
Thanks
Joe ■