Tag Archives: colloid mills

Colloid Mills

Colloid Mill

Colloid Mills. Colloid pulverization is such processing of materials which produces partices of colloidal sizes (several micron and smaller).

At certain conditions, this degree of pulverization can be achieved with just about any industrial grinding equipment. But if the process is considered from the economic and technological viewpoints, it becomes apparent such tasks are best performed by colloid mills. There is no coagulation of particles in the colloid mills, since the process occurs in dispersing media (liquids or, seldom, gases).

Colloid pulverization is almost always a “wet” process. The ratio of solid and liquid phases varies with the nature of the material and can be anywhere from 1:2 to 1:6.

Colloid solutions, unlike normal ones, are heterogeneous. Colloid particles have sizes much larger than the molecules of the dispersion media, which causes formation of phase boundary between liquid and solid phases. The height of this surface increases with increased dispersion of the material.

GlobeCore presents the CLM colloid mills for food, road construction, chemical and other industries. This product is designed specifically for fine pulverization of materials and production of highly stable suspensions, emulsions and solutions. Passing through the gap between the rotor and the stator of the mill, product particles rotate. Centrifugal force tears the particles apart. There are other effects, such as cavitation, which facilitate high quality of dispersion and homogenization.

The CLM colloid mills feature the following advantages:

  • adjustment of pulverization degree and pumping characteristics;
  • production of highly stable materials at the required rate;
  • high degree of homogenization;
  • production of colloid mills from carbon steel, food grade stainless steel or chemically resistant stainless steel on customer request;
  • the mills can be equipped with general purpose or intrinsically safe motors depending on production conditions.

Colloid Mills for Water Bitumen Emulsion Production

Colloid Mill, Road construction industry,
CLM-4.1-colloid mill GlobeCore

Water-bitumen emulsion is highly appreciated by building and road construction companies.  This is due to  its ease and safety of use  in comparison with the mixtures based on solvents of and from petroleum products such as kerosene.  As a rule, water-bitumen emulsion is obtained by blending liquid bitumen with water  and special emulsifiers and acids.

Having years of experience in designing and building blending machines and bitumen emulsion units, GlоbeCоre is one of the most reliable manufacturers of modern equipment for production of water-bitumen emulsions anywhere in the wolrd today.

A colloid mill is considered to be the heart of any bitumen emulsion production equipment where bitumen is grinded into  small droplets and is then evenly distributed in water.  In the past, manufacturers of equipment used blending equipment such as dispergators and ultrasonic homogenise that perform the wet grinding of the dispersed  phase of bitumen production.

GlоbeCоre Colloid mills for wet grinding can produce highly-stable dispersed systems from two or more  mutually insoluble  substances.  Bitumen emulsion units (depending on the desired size of bitumen droplets) use three groups of colloid mills.

The first group of colloid mills provides 90% of droplets with a size of less than 5 microns (a minimum size of a droplet of 1-2 micron).  They are used  to manufacture polymer-modified emulsions, bitumen emulsions for surface treatment ( “chip seal”), recycling, soil stabilization, grouting, tack coating and similar technological processes.

The second group of colloid mills provides 90% of droplets at the outlet with the size of less than 10 microns (a minimum size of a droplet of 4-5 micron).  The areas of its application include: simple slurry mixtures, surface treatment, tack coting, recycling, and grouting.

The third group of colloid mills produces bitumen emulsions with a minimal size of a droplet of more than 5 microns (no more than 10% of droplets are larger than 10 microns).  Such bitumen emulsions are used  for surface treatment, tack coating and grouting.

Since colloid mills are mostly mounted in line with continuous blending units, components are supplied directly to the unit.  As a rule, the water phase is prepared in advance to withstand the required temperature, PH level and emulsifier metering.  Then the water phase and warmed-up bitumen are supplied to the input of the colloid mill to be  dispersed.  If necessary, the viscosity of bitumen is reduced by injecting  flux  to the feed line.

The ratio of components is maintained automatically by metering pumps in accordance with the program or by temperature control of the source components, by measuring the temperature of bitumen emulsion at the outlet (as a rule it is 85-94°С)  and  the subsequent flow adjustment.

If required (depending on the formula), the colloid mill may be supplied with latex that allows for modified bitumen emulsion production.  At the outlet of a colloid mill, there is a three-way valve that provides recycling of water solution of emulsifier, mill flushing or discharge of the finished bitumen emulsion product.

GlobeCore‘s continuous bitumen emulsion equipment has a wide range of benefits that include; (1) a rapid change of the type of emulsion produced; (2) no impact of reagents on the staff; and (3) low operating costs.

GlobeCore: Modern Brand Name Colloid Mills

Colloid Mill,
CLM-4.1-colloid mill GlobeCore

GlobeCore is a leading  manufacturer of high quality equipment used for regeneration, restoration and production of bitumen emulsions and all possible polymer-modified industrial liquids.  GlobeCore equipment has enjoyed  sustained demand in more than seventy countries around the world.

Annually, GlobeCore produces several hundred units for emulsifying, dispersion, wet grinding and blending of solid and liquid substances.  Each blending line or a separate machine delivered to a customer, is tested before leaving the factory.

A wide range of units and machines are designed and produced by GlobeCore.  The line includes machines for fuel blending, vortex layer machines, units for transformer oil regeneration with Fuller’s earth reactivation, bitumen-emulsion equipment, and machines for  fuel decoloration and  blending.

One of the undeniable benefits of GlobeCore equipment is that it is customer-oriented and is manufactured to meet the needs of the customer.

A colloid mill for wet grinding and a homogenizer are considered to be very important units of industrial blending machines that are produced by GlobeCore.  The volume and the quality of colloidal solutions, emulsions and suspensions depend on the  technical specifications  and performance  of colloid mills and homogenizers.  GlоbeCоre engineers do a great job to improve this small, but an important industrial unit.

With the help of modern software, engineers  make the hydraulic calculations and design the working surfaces of a rotor and a stator, the two essential parts found in modern colloid mills (homogenizer).

Due to modern metal-working machinery and based on a high tech digital software, each part of the colloid mill corresponds to the drawings with all tolerances and fitted pieces that were provided by the designer.

If the design of a working chamber of a colloid mill requires lathe work  with the need for subsequent milling of the blades, CNC mills are applied.  Robotic plasma cutting machines provide the accuracy and the purity of the surfaces that are made of sheet metal  A laser guded welding center  ensures  high-quality welded joints.

Generally, the use of the modern  metal processing  equipment  along with the high quality staff allows GlobeCore not only to hold the position as a leading industrial manufacturer of equipment in the hi-tech market, but also garners attention and respect from its customers.

Superfine grinding mills

Colloid Mill, , , , , ,

GlobeCore manufactures advanced mills for superfine grinding, able to make powders, suspensions, sols and stable colloid solutions, as well as other highly dispersed materials. One of the most widespread materials made by superfine grinding is water-bitumen emulsion, widely used in road construction, water proofing of buildings and roofing. GlobeCore specializes in manufacturing of UVB type equipment, made specifically for water bitumen emulsion production.

The superfine grinding mills are made for intensive dispersion of mineral or chemical raw material. Such mills work with low and medium hardness materials and are used in chemical, pharmaceutical, metallurgical and construction industries. Superfine grinding mills are ball crushers, planetary and bead mills, as well as colloid mills and vortex layer generators.

Dispersion in the superfine mills occurs either in batches or continuously, wet or dry. In a dry mill, grinding occurs in air or in inert gas medium by crushing and grinding of the raw material into superfine substance. Dry grinding allows to use larger particles of the raw materials, since the impact action of the balls is more efficient than wet grinding. At the same time, wet grinding mills and in more demand for preparation of colloid solutions and other dispersed systems. New advanced technologies by GlobeCore ensure superfine grinding of organic and inorganic materials on nanometric scale.

Most devices designed for superfine atomization of raw materials, can be designed for both wet and dry grinding. Such are ball crushers, which employ the impacts, caused by rotation of the drum and constant motion of the materials inside: balls of steel, cast iron or another durable material. Ball crushers can be manufactured on industrial or laboratory scale, and can have one or two chambers. Such devices is a prototype of planetary mills, which feature several drums rotating simultaneously around a central axis and their own axis as well. These devices are significantly more efficient in terms of impact on the processed material. Planetary mills offer high degree of dispersion of suspensions and powders.

Bead mills and colloid mills are designed for preparation of highly dispersed material in water media: superfine suspensions, highly stable emulsions and colloid solutions. While the colloid mill dispersed the materials by intensive contact of the rotor and the stator, the bead mill works by constant impacts of beads with the particles of the material.

Complex processes occur in the cylindrical drum of the vortex layer generator between the ferromagnetic particles, the raw material and the liquid, moving in a rotating magnetic field and forming a vortex layer. The advantage of this system is that such interaction accelerates the atomization of the material, increasing production efficiency. The generator can also be used as a reactor to intensify chemical processes.