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Ball Mills & Mixing
Browse our comprehensive selection of planetary ball mills, high energy ball mills, dual asymmetric centrifugal mixers, high torque mixers, and overhead stirrers. Across International offers optimized solutions for particle size reduction, homogenization, and mixing. Our expert team is ready to provide custom tailored R&D, material testing, and support to ensure every application has an optimized solution.
Browse our comprehensive selection of planetary ball mills, high energy ball mills, dual asymmetric centrifugal mixers, high torque mixers, and overhead stirrers. Across International offers optimized solutions for particle size reduction, homogenization, and mixing. Our expert team is ready to provide custom tailored R&D, material testing, and support to ensure every application has an optimized solution.
High Energy Ball Mill
A Ball Mill is a type grinder that blends or grinds materials for various applications. Impact force enables size reduction in feed material. The cylindrical shell rotates around its horizontal axis. The main element enabling grinding are the hard and small balls in the ball mill. These balls are usually made of steel. The inner surface of the hollow shell is coated with an abrasion resistant material. The balls are lifted up as the shell rotates and after an angle of 60° they drop down. This free falling movement create an impact where particles are reduced in size. Metal ores can be ground with ball grinder as well.
Overhead Stirrers
Across International offers overhead stirring solutions for a wide range of applications. Featuring high torque and low torque options as well as various impeller configurations, stands, and accessories. Browse our wide selection of overhead stirrers seen below or ask our technical team to assist with providing a custom package
Planetary Ball Mills
Planetary ball mills may be used for mixing, homogenizing, fine grinding, mechanical alloying, cell disruption, small volume high-tech material production, and even colloidal grinding. They are the ideal wet/dry milling tools for acquiring research samples with high efficiency and low noise. Vacuum jars may be used to process sample within a vacuum environment.
Dual Asymmetric Centrifugal Mixers
Dual asymmetric centrifugal processing systems are ideal for mixing epoxies and slurries, degassing and evaporation, formulations and emulsifications, infusions, particle size reduction, and much more. No bubbles, no cleanup, and perfectly repeatable. Across International offers a wide selection of FlackTek™ systems to suit every application.
Jars and Parts
Planetary milling jars are cylindrical containers used in planetary ball mills to grind materials to a very fine powder. They are typically made of hard, wear-resistant materials such as alumina, zirconia, stainless steel, tungsten carbide, or even polymers like Teflon and nylon. The choice of material depends on the specific application, such as the hardness and abrasiveness of the material being milled, the desired particle size, and the purity requirements.
Frequently Asked Questions
What is a ball mill and how does it work?
A ball mill is a type of blender or grinder that is used for mixing materials, sample preparation, and fine grinding in battery materials, ceramics, ore, metallurgy, chemicals, and pharmaceutical applications. Ball mills work by using friction and impact from the moving grinding media, or balls, to break down materials into fine powder.
What are the common types of ball mills and what are their applications?
The most common types of ball mills include planetary ball mills, vibratory and stirred ball mills, and overflow and grate-type mills, with planetary ball mills being used for high-energy grinding to achieve micro- to nanoscale particles.
Among dry and wet milling, which types of ball mills are better and why?
Better options for wet versus dry milling depend on the type of material and application. Wet ball milling is best for handling sticky materials and achieving a more uniform fine particle size, whereas dry milling is preferred for simple processes and moisture-sensitive materials.
How can I improve the grinding efficiency of a ball mill?
The grinding efficiency of ball mills can be improved by using proper ball loading, mixing, and adjusting the appropriate speed of rotation. The amount of ball loading should be one-third of the drum, the maximum speed of rotation should be between 60 and 75% of the mill’s critical speed, and small and large balls should be mixed together to balance high impact force with greater surface-area contact.
What materials are commonly used for ball mill grinding media?
Ball mill grinding media are commonly made from alumina, agate, zirconia, steel, graphite, and tungsten, depending on the material’s hardness, contamination sensitivity, and grinding efficiency.
What materials and particle sizes can be processed by ball mills?
Ball mills can process a wide range of materials that are brittle, fibrous, or semi-hard. Common examples are ceramics, metals, chemicals, battery materials, and minerals, with feed sizes up to approximately 20 mm reduced down to fine particle sizes in the micrometer range.
How can I reduce high ball consumption in a ball mill?
High ball consumption is generally caused by incorrect loading proportions and poor steel quality, which can be reduced by using high-quality cast or forged steel balls and optimizing the ball load proportion by choosing larger balls for harder materials and smaller balls for finer materials.
What is the difference between a rod mill and a ball mill?
Rod mills and ball mills differ in their grinding media and resulting particle size. Rod mills use steel rods for line contact, making them suitable for coarser products and preventing overgrinding, whereas ball mills use spherical balls, which create point contact and are ideal for fine grinding. Both are used for grinding materials.
What are the advantages of Across International’s planetary ball mills?
Across International ball mills offer digital controllers for controlled operation, high-energy grinding, compatibility with various materials, flexible operation, including wet, dry, vacuum, and inert gas processing, two-way rotation, clockwise and anticlockwise, and micrometer-size particle reduction, making them promising solutions for laboratory research and advanced materials processing applications.
Why is my ball mill not reaching the desired fineness?
A ball mill may not reach the desired fineness because of incorrect ball speed or fill level or the use of an incorrect ball size.
What causes excessive noise and vibration?
Excessive vibration and noise may arise from an uneven distribution of grinding media, bearing failure, loose liner bolts, and worn gears.