Chemical, food, construction and many other industries cannot do without the preparation of different suspensions, emulsions and colloid solutions. \u00a0They include lubricating oil emulsions, fuel emulsions, polymer modified bitumen as well as a wide range of food fat emulsions. \u00a0Additionally, many kinds of gels, creams, and pastes are included in this list, so the list is virtually endless.<\/p>\n
To obtain high quality homogeneous multi-component mixtures and colloid solutions, the production facilities use special blending units that consist of a dispenser. \u00a0The dispenser is used for superfine grinding of solid and liquid components. \u00a0If the \u00a0production method requires a grinding down of the liquid fraction and evenly distributing it in a liquid basis, (dispersed \u00a0medium) or requires preparing the suspension with a small amount of a solid phase, they routinely use a homogenizer.<\/p>\n
The emulsion’s segregation \u00a0resistance \u00a0must be determined, first of all, by the \u00a0size of the dispersed phase. \u00a0For example, in a stable water-fat emulsion, the droplet size should be no more than 5 microns which can be produced by a modern centrifugal (rotary) homogenizer. \u00a0A rotary homogenizer is used \u00a0to reduce the droplet size of the emulsion to between 1 and 2 microns, also known as the so called secondary homogenization.<\/p>\n
Many years ago, valve homogenizers were widely used and accepted as standard within industry. \u00a0Now the preference is given \u00a0to \u00a0the centrifugal (rotary) homogenizers due to the following benefits:<\/p>\n
(1) Reduction of the processed materials down to 1 micron; (2) compact size of the equipment; (3) low power consumption; (4) simple design; and (5) high degree of reliability.<\/p>\n
Depending on the model, the homogenozer’s rotor speed varies from 2,000 to 18,000 rpm. \u00a0The intensive vortexing and micro cavitation processes ensure the homogenization and stability of the mixture. \u00a0If the technological process or recipe requires the production of a suspension with a large content of a solid phase (up to 40%) or a high stable emulsion, or a fine suspension, then solid and liquid \u00a0substances are mixed in a colloid mill (dispergator).<\/p>\n
A colloid mill allows not only for the intensive blending of particles and droplets in a suspension or thick emulsion, but also for grinding solid fractions of the suspension (emulsion droplets) down to the size of between 1 and 2 microns producing high-quality suspensions and emulsions.<\/p>\n
In terms of design, colloid mills resemble rotary (centrifugal) homogenizers. \u00a0The wet method is the basis for the grinding of solids in a colloid mill. \u00a0The main working body of a colloid mill, as well as a homogenizer, is constituted by a pair of drives. \u00a0One of the drives serves as a stator and another as a rotor.<\/p>\n
The linear velocity of the rotating drive surface can work up 125 m\/s. \u00a0This high speed provides the intensive turbulent processes in the intradiscal space that contributes to the effective grinding of the dispersed phase. \u00a0It ensures even distribution in the processed and dispersed medium.<\/p>\n
The practice has shown that modern twenty first century colloid mills \u00a0can provide the highest degree of dispersion and emulsification that meets the \u00a0requirements of the majority of industrial technological processes.<\/p>\n","protected":false},"excerpt":{"rendered":"
Chemical, food, construction and many other industries cannot do without the preparation of different suspensions, emulsions and colloid solutions. \u00a0They include lubricating oil emulsions, fuel emulsions, polymer modified bitumen as well as a wide range of food fat emulsions. \u00a0Additionally, many kinds of gels, creams, and pastes are included in this list, so the listRead More <\/a><\/p>\n","protected":false},"author":1,"featured_media":2636,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[36,52],"class_list":["post-2559","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-colloid-mill","tag-colloid-mill","tag-homogenizer"],"acf":[],"language":"en","_links":{"self":[{"href":"https:\/\/mill.globecore.com\/en\/wp-json\/wp\/v2\/posts\/2559","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mill.globecore.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mill.globecore.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mill.globecore.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mill.globecore.com\/en\/wp-json\/wp\/v2\/comments?post=2559"}],"version-history":[{"count":0,"href":"https:\/\/mill.globecore.com\/en\/wp-json\/wp\/v2\/posts\/2559\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mill.globecore.com\/en\/wp-json\/wp\/v2\/media\/2636"}],"wp:attachment":[{"href":"https:\/\/mill.globecore.com\/en\/wp-json\/wp\/v2\/media?parent=2559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mill.globecore.com\/en\/wp-json\/wp\/v2\/categories?post=2559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mill.globecore.com\/en\/wp-json\/wp\/v2\/tags?post=2559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}