A silverson l4r rotorstator mixer with a squarehole stator head was used to conduct systematic wet milling experiments. Rotor stator mixers have been classified either according to the rotor stator assembly toothed devices, colloid mills, axial and radialdischarge or based on operation batch, semibatch and. The rotation produces suction, which pulls the medium into the rotor and then pushes it to the outside with help from the stator s teeth. The myers single shaft mixers models 775 or 800 are often used with a rotor stator blade for light to medium viscous products. These devices are popular due to their numerous industrial applications and their ability to be used in process vessels, inline between vessels, or in a recycle loop.
The differential speed and close tolerance between the rotor and stator generate high levels of hydraulic shear, promoting fast mixing and breakdown of nanoparticle agglomerates. The unique patented revolving stator, when combined with the closeclearance, driven rotor and high efficiency lower propeller, optimizes shear rates, pumping rates and particle size reduction. Rotor stators are high shear mixers that incorporate both a rotor and a stationary stator. This is difficult since basic knowledge of high shear mixer performance has only recently begun to emerge. Since the same rotorstator heads are often used in both modes of operation, it is sometimes assumed that transitioning from batch to continuous rotorstator mixers is straightforward. To cater for less arduous applications the rotamic lc was developed. Join the grabcad community today to gain access and download. Rotorstator homogenizers consist of a fastspinning inner rotor with a stationary outer sheath stator to homogenize samples through mechanical tearing, shear fluid forces, and or cavitation the rapid forming and collapsing of bubbles. Rotor stator mixers, rotor stator mixers suppliers and.
This type of device creates mechanical and hydraulic shear by continuously drawing product components into the rotor and expelling them radially through the openings in the stator. Dispersing with an ultra turrax is based on the rotor stator principle. Scaleup of rotorstator equipment pharmaceutical online. Rotorstator mixers, due to their highshear capabilities,are increasing in popularity.
Scaling up of silverson rotorstator mixers hall 2011. In these cases, rotorstator devices are capable of generating much smaller droplets than, e. Particle deagglomeration with an inline rotorstator. Inline rotorstators are used in a range of energy intensive processes but there is relatively little published work with these devices on which to base process design. D6 3 rotor stator, ump v1, zincyellow for using with ump 1 mixing and. Rotorstator mixers are commonly used in food, pharmaceutical, and cosmetics. A new twist on a rotorstator mixer chemical online. Rotorstator mixer are used in various different process industries. Rotorstator devices provide a focused delivery of energy, power and shear to accelerate physical processes such as mixing, dissolution, emulsification, and deagglomeration. In this study the effect of rotor speed, flow rate and dispersed phase viscosity on drop size distributions in an industrial and in a lab scale in. Power draw for inline rotor stator devices turbulent power for a batch rotor stator device can be described by a single tank type impeller power number, equation 1. The sawtooth disperser and rotorstator mixer are two of the most widely used high speed mixers yet many are unaware of the differences in.
As the rotating blades pass the stator, they mechanically shear the contents. By carefully controlling all 3 characteristics, the rotostat will never overshear materials or formulas. About 92% of these are mixing equipment, 1% are construction machinery parts, and 1% are concrete mixers. The test rig consists of an inline silverson rotor. Find rotorstator mixers related suppliers, manufacturers, products and specifications on globalspec a trusted source of rotorstator mixers information. Pft sales area west africa, south america, spain, france, portugal 74,687 views. The invention relates to a homogenizer for homogenizing flowable materials, with a rotor 3 and a stator, which have teeth 4,5,7,8 which are concentric with one another.
Here, the rotor is moved with a high circumferential speed. This chapter presents different rotorstator devices for batch and continuous processes, such as highshear mixers, disperser discs, colloid mills, and inline gearrim devices, and outlines possible modes of operation. They can be used as batch intank units or as continuous inline devices and they typically consist of a highspeed rotor rotating in a fixed stator. In comparison, a rotor stator mixer typically features a fourblade rotor running at tip speeds in the range of 3,0004,000 ftmin within a close tolerance fixed stator. Rotorstator mixers the rotamix high shear rotorstator mixer has an excellent proven record over many years, as a very efficient, reliable and competitively priced mixer comparable with. Sawtooth disperser rotorstator mixer illustration of an inline rotorstator mixer connected to the recirculation loop of a gentlystirred tank. In 1955 myers developed a rubber cutter and dissolver to handle the extreme conditions in the adhesive, sealants, and caulking compound industries. To reliably scaleup these devices we need to understand the relationship between rotor speed, flow rate, shear rate, and the energy dissipated by these devices. There are inline units with a standard shear gap clearance between rotor and stator and an enlarged shear gap, and a batch unit with a standard shear gap. Rotor stators have been used in the production of paint, ink, food, chemical, and pharmaceutical industries for many years. Pro scientific rotor stator homogenizers outperform cutting bladetype blenders and are well suited for plant and animal tissue homogenization. The rotor 6 simultaneously executes a feeding effect in the axial direction using pump vanes, and the stator is externally closed in the radial direction.
It is a short video of ginhong high shear rotor stator mixer. The highspeed rotation of the rotor blades within the precisionmachined. Devices are designed for industrial or laboratory use, and there a variety of choices for mounting style. Product is forced through the gap of the rotor stator often at high speeds creating a final homogenous blend. When dealing with highlevel dispersions that conventional rotorstator mixers cannot successfully make, manufacturers switch to higher energy devices. A low cost rotor stator mixer at a very competitive price.
Surfactants are often required to stabilize liquidliquid dispersions produced by rotorstator mixers. High shear rotor stator mixer for water and sesame paste. Ika machines allow this small of a gap because of precision machining and. The finer the particle size and the softer the material to be pumped, the harder the required rubber quality for the stator. The advantage of the recycle loop is that for the same power duty a. Rotorstator mixers have been classified either according to the rotorstator assembly tootheddevices, colloid mills, axial and radialdischarge or based on operation batch, semibatch and. Pro homogenizers are mechanical, high shear homogenizers for blending, mixing, disrupting, emulsifying, dispersing and stirring. A wide variety of rotor stator mixers options are available to you, such as homogenizer, agitator, and stator. This study was performed to investigate the performance of an inline. The small gap between the rotor tip and surrounding stator in combination of high rotational speeds.
Up until the recent development of the pressure wedge device, the rotorstator devices that actually worked were devices of extremely close tolerances and high speeds, which had the reputation of being power hungry and unable to handle high viscosity materials. Rotor stator homogenizers rotor stator homogenizers. Fabrication of nanoemulsions by rotorstator emulsification. Ep0988887a1 homogenizer with protecting device on the. Homogenizers for mixing, dispersing, and emulsifying. A rotor stator is a high shear mixer that utilizes a rotor a stationary stator that typically operate at very high speeds, creating a vortex circulating the product through the gap between the rotor and stator, resulting in a very homogeneous dispersion. Program visimix rsde is the a unique software program for mathematical modeling and technical calculations of installations with high shear devices rotor stator and tooth disk homogenizers. In dispersion experiments, the aqueous suspensions of fumed silica particles, aerosil 200v, are used. Effect of surfactants on drop size distributions in a. Products sanitary mixers batch rotor stator mixer how the batch rotor stator mixer works. The other differences between the stator and rotor are shown below in the comparison chart. As a result, there are a wide range of designs available on the market. The ross turboemulsifier consists of a counterrotating turbine and a high speed rotorstator.
Rotorstator mixers differ in terms of operating configuration. Particle deagglomeration with an inline rotorstator mixer at different solids loadings and viscosities. We are proud to say that our mills are currently in operation in over forty countries all around the globe. Since drops are deformed rapidly due to the high power input of these devices, the dynamic interfacial properties governed by the surfactant adsorption rate have a significant effect on the resulting drop size.
Ways to optimize solidliquid mixing a white paper prepared by. As a result, newer mixer designs such as inline high shear rotorstator devices have become more in demand and have undergone significant developments in terms of features and functions. Rotorstator mixers have a broad spectrum of applications in chemical. Kady international industrial mixing mill solutions. Visimix rsde rotorstator visimix mixing simulation. The batch model high shear rotor stator mixer design consists of a single stage rotor that turns at high speed within a stationary stator. The rotation produces suction, which pulls the medium into the rotor and then pushes it to the outside with help from the stators teeth. It is characterized in that the rotor 3 has a protective toothing 4 radially on the inside of the first stator toothing 7 with openings of a clear width adapted to the minimum size of foreign bodies to be kept. Rotorstator mixers have batch or continuousprocess modes. The shearpro unit can be used in either oncethrough, or recirculating mixing processes. The rotor stator head is positioned in the bottom center of the mix vessel to enable its use with very small volumes of material. With quality, experience and expertise becomix has been a longterm partner with reputable customers, global players, as well as with mediumsized and smaller companies in the cosmetics, pharmaceuticals, chemical and food industries around the world. This white paper presents some ideas for selecting the right inline high shear mixer for your process.
The addition of a high shear rotorstator mixer adds the capability of emulsifying and homogenizing products that require higher shear to. A mixing device 1 including a rotor 6 having pulverizing edges 7 and acting together with pulverizing edges 9 of a stator 8 is provided. These devices are po pular due to their numerous industrial. The significant difference between the rotor and the stator is that the rotor is the rotating part of the motor whereas the stator is the stationary part of the motor. As we can see in this video, the high shear homogenizer is making sesame paste. While the chapter is mostly practical in its outlook, some attempt is made to relate design and scale. Becomix is a global leader in the manufacturing of processing plants and process solutions for the production of liquid and semisolid products.
The grabcad library offers millions of free cad designs, cad files, and 3d models. Rotorstator mixers are found in many chemical processing industries, and are considered the standard tool for mixing and emulsification of high viscosity products. By contrast, scaleup of high shear devices such as rotorstator mixers is still very much based on a practical approach rather than a theoretical one. At least one rolling bearing is provided behind the rotor 6 in the feeding. Us8303162b2 mixing device with stator having grooved. One of the uses for rotorstator mixer is to perform liquidliquid homogenization. The shearpro rotor stator is a high intensity inline mixer that can be used for blending, producing extremely stable emulsions, ultrafine dispersions, accelerated reactions, and can eliminate fisheyes and hydrate polymers and gums for thickening products. All rotorstator mixers are available certified flameproof atex ex ii 2 g or nonflameproof. Dispersing with an ultra turrax is based on the rotorstator principle. Rotor stators can be cleaned in place and can be constructed of 304 or 316 stainless steel.
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