of the Vortex Technology advantages and about the company's business aspects.
Super Fine Ltd. is a private company, dealing with the development of an innovative unique milling system based on vortex technology. Via our contact with tens of companies representing various industries throughout the world it has become clear that in the field of particle size reduction, problems are experienced regarding powder quality and many industries have to compromise with the current situation.
It has been found that in many cases our milling technology provides the sought-after solution regarding powder quality and/or required particle size and/or milling energy saving.
The company was granted two patents for the Super Fine's Vortex mill
The Super Fine Vortex mill can process a wider range of materials.
On the one end of the scale, it can mill "soft", energy-absorbent materials such as rubber, polyethylene and many kinds of polymers. On the other end of the scale, it can also mill hard and super hard materials such as carbide ceramics.
Super Fine's milling technology delivers a product of superior quality to that obtained by other milling technologies in terms of uniformity, minimum ultra-fine powder and purity.
Super Fine's milling technology can significantly reduce milling costs for a number of reasons such as low energy consumption, replacement of the cryogenic process with ambient temperature and high milling efficiency.
Super Fine’s technology has a number of significant advantages in comparison to other milling methods currently on the market:
1. Advantage with "soft" materials -
One of the most outstanding advantages of the Vortex mill is that it can replace cryogenic milling with room-temperature milling or, in some cases, milling with air-cooling but only to a certain extent.
2. Powder Quality
In numerous cases were we able to solve milling problems relating to the quality powder aspect. TheSuper FineVortex mill also offers a solution to the problem of powder quality; we can reassure customers from the electronics and the pharmaceutical industries that the material we mill is with high quality.
3. Milling in a single stage.
Super Fine’s SINGLE stage process means that there is no need to conduct an additional classification process. ALL the milled material falls into a narrow size distribution so that when we say that the d50 = X, we mean that ALL the milled material has a d50 of X. This is in contrast to many milling methods, which require that a selection and classification process be conducted after the milling process in order to obtain the desired d50.
Due to the facts that we are using less energy, all the materials comes out in the same size, no need for addition classification stage and in those cases in which we can replace cryogenic process – In many cases we can get a better quality powder with a process that costs much less!
In the last three years the company has conducted thousands of milling experiments with hundreds of different materials. As a result of these experiments, we define the possible uses for applying our technology with various materials and industries as follows:
Hard and super-hard materials:
Milling to a size of d50=2-4mm
Examples of materials: Zirconium, Boron-Carbide, Silicon-Carbide, Tungsten-Carbide, Boron Nitride, a-Alumina (Corundum), Silicon Nitride.
Particle size is aimed according to customer’s requirements.
We have been very successful with this group of materials and met the customers’ requirements.
Milling to a size of d50=0.9mm
Examples: Yttrium Oxide, Neodymium Oxide, Dysprosium Oxide, Erbium Oxide.
Milling to a size of d50=0.3mm or according to the customer’s requirement.
Examples: Deferent kinds of Organic and non-organic pigments.
Particle size is aimed at according to customer’s requirements.
Examples: Vitamins, Three Calcium Citrate, Mono, Sodium Citrate, Soya, tomatoes.
Chemicals and Minerals:
In various types of materials, the milling results were exactly at according to the customer’s different requirements. In many of the cases we were the solution for the customers who had experiences difficulties and failure with other pulverizing systems.
Bellow are three success stories to represent our technological capabilities:
One of the largest companies used to mill this material by cryogenic process. Even so, they received quite a wide particle size distribution and a very low capacity. They tried (according what they told us) all the milling systems in the world but couldn't find a solution for how to mill this material in a way that would meet the requirements and in an economic cost.
We solved their problem! We Mill the Lutrol material
• Using only chilled air
• At doubled capacity
• Receiving smaller size as they define in very high uniformity
Currently this material is milled by using cryogenic process and gets D50 of about 5-6 µ. The market is seeking for finer powder, D50 of up to 3 µ and even with cryogenic process it couldn't be achieved.
We solved this problem! We mill the Phytosterol to D50 of 2.8 µ by using ambient temperature air.
Lithium ion battery
* Batteries' manufacturers seeking to increase a surface area of the electrode materials such as LMO and NCM for Li ion cells.
* All the common milling methods include Jet milling, use mechanical force to reduce the particles size and therefore produce cracks and fractures due to the impact forces.
* The patented Super FineVortex milling method does NOT use mechanical force, does NOT produce cracks or fractures in the crystalline electrode materials as well as produces significantly less powder fines.
* It was found that theSuper FineVortex milling has a positive effect on the electrode material's performance of Li ion cells.
1. Tens of samples have been milled with different electrode materials in Li ion cells. With targeted size of D50 2-3 microns
2. Comparisons were made between cells prepared by Vortex milled electrode materials and between cells based on pristine powders. In most of the cases the cells based on milled materials showed better performance than the cell with pristine powder.
3. The best results were achieved with micron size milled cathodes of Li-NCM and LMO-spinel.
For Example here in the preliminary results for the Lithium Manganese Oxide (LMO) spinel type cathodes cells:
1.Specific power -measured in a 10 second pulse charge and discharge test-the specific power was minimum of 25% higher in room temperature 50% higher in -20°C and 100% higher in-40°C – than the control cells made with pristine electrode
2. Electrochemical Impedance Spectroscopy (EIS)
The exhibit EIS was at least 10% up to 15% lower than the un-milled electrodes control cells
3. Operating voltage/Capacity
The Operating voltage for the cells with milled electrode material was higher than in the control cells made with electrode milled by Jet mill
The Capacity of the cells based on milled material was improved by 10% up to 60% depend on the discharge temperature as the following:
a.At 2.5Amp (constant current) – 10% higher (at room temperature)
b.At- 20% higher (at -20 ºC )
c.At 1Amp – 60% higher (at -40 ºC )
4. Life Cycle
The life cycle of the cells made with milled material performed a capacity/specific power at least 15% up to 30% higher than control cells made with pristine electrode
In this test –at least 80% of the cell nominal capacity required after prolonged cycling (300-500 cycles)