If your application needs reduction whether it is 6-inch to sub-micron size, choose from Praters superior fine grinders, air classifying mills, hammer mills, and lump breakers to meet all of your industrial processing needs. We have been designing, manufacturing and creating innovative solutions for large and small customers all over the world. Praters products are some of the most versatile and diverse on the market. We are always committed to providing the highest-quality processing equipment to ensure efficiency and overall performance.
Our lump breakers reduce pieces or lumps from 6-inch to 1/16-inch and feature easily replaceable rotating and fixed blades. Many different products, such as chemicals, minerals, salt, sugar, fertilizer, and ceramic powders, can be processed using our state-of-the-art lump breaker. If you are looking for something a bit more precise, consider our fine grinders for your needs. Designed to grind dry, free-flowing material down to 200 mesh with very tight particle distribution, our fine grinders are also ideal for heat-sensitive materials such as powder coatings, sugars, and resins.
Praters Hammer Mills are widely used throughout a variety of industries for processing many different materials within a wide selection of particle reduction applications requiring high capacities, power efficiency, and uniform particle size. All of our hammer mill models utilize our exclusive full-screen design, which ensures the use of the entire available screen area. Additionally, our Air Classifying Mills offer both two-state closed-circuit grinding with inter-stage air classification all in one convenient unit. The Air Classifying Mills are ideal for any difficult-to-grind applications or for any narrow particle distribution curve.
The ultra-fine grinder machine is suitable for the industries of medicine, agriculture, food, chemical industry, alloy, metallurgy, geology, scientific research.,etc. With excellent Eversun technology, it can grind various types of Chinese medicine, precious medicinal materials, ores, chemical raw materials into ultra-fine powder, such as donkey-hide gelatin, frankincense, astragalus, notoginseng, hippocampus, dodder, Ganoderma lucidum, licorice, pearl, and other materials with different properties.This grinder is also suitable for food superfine grinding, spice superfine grinding, and condiment superfine grinder.
This machine adopts a high-speed single-phase motor, with precise structure, high efficiency, no dust, clean and hygienic, simple operation, power-saving and safety. Its also qualified for GMP standards.
The raw material enters the crushing chamber through the feed valve and is impacted by the impact hammer, causing the strong collision, friction, and shearing to achieve ultrafine crushing. The pulverized material enters the classification chamber with the rising of the airflow. The material that meets the particle size requirements enters the collection system through the impeller classification, and the particles that do not meet the particle size requirements return to the pulverization chamber to continue pulverization. The entire production process is fully enclosed and continuous operation, without dust pollution.
Please contact our Eversun professional engineers, and inform the material name, target fineness and output, we will recommend the appropriate model of ultra-fine powder grinder machine to you according to your needs.
There are numerous industries that depend on particle size reduction to improve the performance of a variety of materials. Particle size reduction is utilized in the manufacture of many end products across a variety of industrial sectors.
The three most popular particle size reduction techniques on the market today are compression type mills (e.g. roller mills), impact mills (hammermills, fine grinders) and attrition mills (e.g. colloidal mills or disc grinders).The method of choice relates to the properties of the material being processed and its desired attributes following the size reduction process. For instance, a friable (brittle) material may respond better to impact milling whereas an attrition mill may be better suited for softer or heat sensitive materials. Compression type mills may be preferred for products that require gentler processing with less heat generation.
Fine grinders fall under the category of impact milling equipment, a mechanical particle size reduction method used to decrease the fineness of most bulk solids. Impact mills reduce the size of large particles by introducing a striking force that stresses the natural defects, or weak spots in those particles beyond their yield strength. Fine grinders are best suited to reduce dry, free-flowing, friable material into a narrow particle distribution defined by a series of mesh or micron sizes. While it's common to refer to a size objective using a single target size, specifying at least three can help better define the coarsest, median and finest particles desired. To avoid confusion, maintain consistency when referring to mesh and micron targets, as they can often be confused. While charts are available to convert one to the other, the two can be misinterpreted if not properly identified. For example, a client who desires an 80 micron result would misrepresent their goal by stating an 80 mesh (212 micron) objective.
Size reduction carries several benefits. For example, smaller particles tend to exhibit more trait uniformity, whether it be color or grain texture, that can positively contribute to product perception. Particle size uniformity also prevents segregation of individual ingredients within a blend. In another example, size reduction is utilized to increase the surface area of materials, which can enhance the color concentration of pigments or the reactivity of sorbents. In both cases, less is more, resulting in higher value of the ground product. Size reduction is also vital in the production of cereals and grains, whether it be for improving the functional properties of a flour or the digestibility of animal feed.
Prater Industries Fine Grinders are designed to micronize free-flowing materials from 60 to 200 mesh (74 micron). Capable of running in an air sweep, they are also well-suited to process heat sensitive materials such as sugar or resin. Their precision design includes a close tolerance between the rotor blades and grinding jaws & screens, resulting in a uniform particle size distribution. A large horsepower to screen ratio provides greater efficiency. What sets Prater Fine Grinders apart is their unique inner workings. Product is uniformly fed into the grinding chamber, where air sweeps particles into harm's way along the impact face of blades positioned around the rotors circumference. Impacted particles are accelerated outward, colliding with one another and shearing along the face of machined jaws and screens fixed around the outside of the rotor. The stationary surfaces of these jaws and screens cause rapid particle deceleration and rebound into the rotors path for additional impact. This process of impact, acceleration/deceleration, shear and rebound continues until particles are small enough to pass across the screens apertures. Selecting screens with different apertures helps define the endpoint of the grinding process, where smaller apertures create more retention of particles so additional work can be done. Pneumatic air helps to displace particles through the screen and conveys the ground product to a down-stream collection point.
The overall benefits of the Prater fine grinders include greater capacity, better dust control, a precise distribution, easier maintenance, and improved standard safety features such as the automatic safety door interlock. The vertical rotor design with a large, hinged door of Praters fine grinder allows for easy access to the internals of the mill thus reducing maintenance and changeover times.
Confectioners' sugar also called powdered sugar, 10X, or icing sugar involves finely grinding sugar granules into a powdered state. Confectioners' sugar usually contains anti-caking agents such as tricalcium phosphate, potato starch, or cornstarch to absorb moisture, helps the sugar flow easily, and prevent clumping. Because of these additives, confectioners' sugar is typically 95-97% percent sucrose.
Though it can be made by hand, factory-produced confectioners' sugar usesindustrial sugar milling machinery: fine grinders, air classifying mills, lump breakers, and airlocks. This finely ground sugar is often used in industrial food production when recipes require sugar that dissolves quickly. It is used in the manufacture of icing, many types of mass-produced candies, and other foods containing sugar manufactured at scale.
Confectioners' sugar varies in how finely it is ground and is often designated as 6X, 8X, or 10X. The finer the sugar granules are ground, the higher the X number, with 10X used to provide smoothness and consistency in icings. Because of how fine it needs to be ground, fine grinders are often used in the confectioners' sugar grinding process to produce it in bulk.
Powered sugar is used primarily because of its ability to dissolve in water, which food processing manufacturers use to make all sorts of sweetened food products at scale. Ideally suited for processing raw sugar into ultra-fine confectionery grades, grinders reduce the sugar granules into powder through impact and shear action.
These ultra-fine grinders pulverize free-flowing, dry material into tightly distributed particle sizes as fine as 400 mesh (37 microns). When it comes to fine grades of confectioners' sugar, ultra-fine grinders can easily reduce granules between 100-200 mesh (75-149 microns), depending on the final "X" designation required.
Fine grinders are designed to operate within pneumatic conveying systems. They are practical when milling heat-sensitive materials such as sugar which also requires a high degree of dust control to reduce the possibility of dust explosions. Pneumatic systems work by using an enclosed conveying circuit to move material, using fans or blowers to create pressure differential and airflow. By controlling the pressure and airflow, the fan moves material through the system with little damage or loss. Pneumatic systems work well with batch ingredients that require weighing and cooling during their manufacture.
Fine grinders are a type of impact milling equipment that mechanically reduces the particle size of a wide range of bulk solids, including systems that break down various types of flour, minerals, grains, and sugar. Impact mills use a striking force to stress natural weak spots in the particles, breaking them down into smaller sizes. Used primarily on dry, free-flowing material like sugar granules, fine grinders are well-suited to produce a narrow particle distribution for greater uniformity.
Prater Industries Fine Grinders offer better control of dust, easier maintenance, improved safety features, a precise distribution, and greater capacity. This combination of features is the perfect combination for large-scale sugar grinding operations. Using a cantilevered, vertical rotor design, Prater's fine grinder features a large hinged door to allow easy access to the internal mechanics, reducing the time needed for maintenance and product changeovers.
Prater's fine grinders can break down sugar particles to 200 mesh (75 microns) and finer. Its highly efficient design works well within any process that includes sugar grinding, with multiple sizes available to suit various production needs. The high-speed impact principle allows production lines to precisely control particle size.
All FGT systems respect the legislation in terms of PM weight concentration.NP emitted from large scale gas turbines are lower than PM levels in ambient air.Residual NP emitted from coal and RFFC plants remain high.Residual NP emissions are mainly related to sulfuric acid aerosols.
This study is to our knowledge the first to present the results of on-line measurements of residual nanoparticle numbers downstream of the flue gas treatment systems of a wide variety of medium- and large-scale industrial installations. Where available, a semi-quantitative elemental composition of the sampled particles is carried out using a Scanning Electron Microscope coupled with an Energy Dispersive Spectrometer (SEM-EDS). The semi-quantitative elemental composition as a function of the particle size is presented. EU's Best Available Technology documents (BAT) show removal efficiencies of Electrostatic Precipitator (ESP) and bag filter dedusting systems exceeding 99% when expressed in terms of weight. Their efficiency decreases slightly for particles smaller than 1m but when expressed in terms of weight, still exceeds 99% for bag filters and 96% for ESP. This study reveals that in terms of particle numbers, residual nanoparticles (NP) leaving the dedusting systems dominate by several orders of magnitude. In terms of weight, all installations respect their emission limit values and the contribution of NP to weight concentrations is negligible, despite their dominance in terms of numbers. Current World Health Organisation regulations are expressed in terms of PM2.5wt concentrations and therefore do not reflect the presence or absence of a high number of NP. This study suggests that research is needed on possible additional guidelines related to NP given their possible toxicity and high potential to easily enter the blood stream when inhaled by humans.
Kyle James, VP of sales at Retsch USA (Newtown, PA) notes that demand for particle size reduction systems has grown significantly from alternative industries. Demand from the energy sector has been substantial, particularly for processing biomass materials such as wood, refuse, and even garbage, Mr. James says.
The breadth of life science applications has given rise to fierce competition between homogenization and milling/grinding. Both have utility in this area, but the tug of war between competing methods goes on.
Fatty acid sample preparation from animal or plant cells is usually conducted with a high-speed emulsifier (e.g., the Ultra-Turrax from IKA Works). The technique, according to literature from Spex Sample Prep (Metuchen, NJ), may be unsuitable for high-throughput labs. Until recently, high-throughput, mechanical cell disruption based on grinding employed traditional ball or swing mills adapted to microtiter plate formats.
The pharmaceutical industry has been hit hard by patent expirations and a dearth of new drug approvals. With chemical innovation lagging, drug developers increasingly turn to novel formulations to improve prospects for both old and new compounds. Nanotechnology the creation of submicron-sized particles of drugs and ingredientshas played a significant role in these efforts.
Nanoformulated drugs dissolve and enter tissues more easily than large crystals, and may even be used to create oral dosage forms and injectable suspensions. Bill Henry, executive VP at Jet Pulverizer (Moorstown, NJ), notes that ball and jet mills have traditionally been used to reduce particle sizes down to just below 1 micron, normally the upper-size domain limit for all things nanotech. Thats the focus for these mills, particularly for electronics and battery applications, says Mr. Henry. In pharmaceuticals, he adds, milling may be thought of as a pregrind, or precursor to nanoparticlegenerating milling processes.
Yet for some pharmaceuticals, the higher end of the nano-size domain might be just what the doctor ordered. Ball milling is being investigated extensively for drug particle size reduction; the manufacturing processes for five approved drugs already use milling.
Two basic strategies exist for creating submicron-sized drug particles. The bottom up approach involves precipitation or chemical synthesis; the top down approach uses jet milling, wet ball milling, and HPH.
HPH, which produces the finest particles of the three techniques, employs a piston-gap homogenizer in water at room temperature. As drug suspensions pass through a homogenization gap, the particles are ripped apart during the collision of two fluid streams as a result of their impact with neighboring particles plus shear and cavitational forces.
Jan Mschwitzer, Ph.D., who heads early pharmaceutical development at Abbott Healthcare Products (Weesp, The Netherlands) suggests that in selecting a particle size reduction technology, drug developers first consider the bioavailability and pharmacokinetic parameters desired for a specific therapeutic. Perhaps equally important is how easily the size reduction method scales to manufacturing.