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SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS (removing fluids from solids B01D; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high voltage electric fields B03C; flotation differential sedimentation B03D; separating by dry methods B07; screening or sifting B07B; by picking B07C; separating peculiar to particular materials and provided for in other single classes, see the relevant classes)
Definition statement
This subclass covers:

Apparatus for separating or classifying or washing granular powdered or lumpy solid materials of different physical properties like size, shape, specific gravity etc..

Relationship between large subject matter areas

Separation of isotopes of the same chemical element is covered by B01D 59/00 whatever process or apparatus is employed.

Crushing or disintegrating is covered by B02C.

Centrifuges or vortex apparatus for carrying out physical processes is covered by B04B and B04C.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Separation in general

Separation of suspended solid particles from liquids by sedimentation

Selective separation of solid materials carried by or dispersed in gas currents, using centrifugal force

Recovery of plastics or other constituents of waste material containing plastics; Separating plastics from other materials

Glossary of terms
In this subclass, the following terms (or expressions) are used with the meaning indicated:

Jig

An apparatus for cleaning or separating solid particles (ore, coal etc.) by agitation in a fluid, e.g. water, where the layer or bed of particles are supported on a perforated plate or screen is subjected to an alternating rising and falling (pulsating) flow of the fluid

Vanner

An apparatus for cleaning or separating solid particles (ore, coal etc.) by an inclined belt

Sluice

An apparatus for cleaning or separating solid particles (ore, coal etc.) by an inclined trough with riffles at the bottom to retain the heavy minerals

Strake

An apparatus for cleaning or separating solid particles (ore, coal etc.) by a finely riffled sluice in which fabrics or corrugated rubber forms pockets to trap heavy mineral

Heavy media

Liquids or suspensions of particles in water used for sink-float separation

Conditioning for facilitating separation by altering physical properties of the matter to be treated (pre-treatment of ores in general C22B{ Pretreatment prior to magnetic separation B03C 1/00})
Definition statement
This group covers:

Pre-treatment, like heating, cooling, exposing to radiation, adding additives, varying physical properties, of the material prior to physical separation carried out by methods and devices of this subclass.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Pre-treatment of ores in general

Pre-treatment prior to magnetic separation

Pre-treatment prior to flotation

Separating by pneumatic tables or by pneumatic jigs (sink-float separation using dry heavy media B03B 5/46)
Definition statement
This group covers:

Separating or classifying materials on stationary, swinging, shaking, rotary or belt-like tables and using a continuous or pulsating gas current.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Sink-float separation using dry heavy media

Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements and material is passing through the sieve, screen or the like

Washing granular, powdered or lumpy materials; Wet separating (separating by pneumatic tables or by pneumatic jigs B03B 4/00)
Definition statement
This group covers:

Washing in order to separte fine particles esp. organic particles from coarse particles. Apparatus for classifying solids by wet methods.

References relevant to classification in this group
This group does not cover:

Flotation

Informative references
Attention is drawn to the following places, which may be of interest for search:

Separation of suspended solid particles from liquids by sedimentation

Dry helical separators

Sewerage structures; Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates

Investigating or analysing materials by separation into components; Field flow fractionation

using centrifugal force (centrifuges B04B ; cyclones B04C)
Definition statement
This subgroup covers:

Apparatus and methods using centrifugal force for separation, e.g. by utilizing centrifuges or hydrocyclones (cf. B03B 5/34), not necessarily using special heavy liquids or suspensions. (Documents with special technical features relating to a centrifuge are additionally classified in B04B, documents with special technical features relating to a hydrocyclone are additionally classified in B04C).

Informative references
Attention is drawn to the following places, which may be of interest for search:

Separation of suspended solid particles from liquids by sedimentation; Separation of sediment aided by centrifugal force

Centrifuges

Cyclones

Special rules of classification within this subclass/group

In all subgroups below B03B 5/30 (using heavy liquids or suspensions) the liquid for separation is not necessarily a heavy liquid or suspension, but a liquid with a specific gravity (maybe water), suitable to carry out the envisaged sink-float separation.

{Upward current classifiers}
Definition statement
This subgroup covers:

Hydraulic classifiers where the hindered settling is accomplished by an upwardly directed fluid flow.

Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
Definition statement
This group covers:

Wet processes or apparatus in combination with other types of separating processes or apparatus, particularly for dressing/processing ores/minerals, mainly mechanical treatment of crude ores to separate and concentrate the valuable constituents.

References relevant to classification in this group
This group does not cover:

Combinations of wet solid separating processes comprising a specific separating process

Informative references
Attention is drawn to the following places, which may be of interest for search:

Pre-treatment of ores in general

General arrangement of separating plant, e.g. flow sheets
Definition statement
This group covers:

Plants with or without flow sheet involving different, more than one, apparatus for separating, screening, classifying, crushing, etc., not necessarily of the wet or pneumatic table type, specially adapted for the materials specified in the sub-groups. If there are multiple separation techniques involved, the classification occurs also in the subgroups for the specific separation technique (e.g. in B03B 5/18 if a moving-sieve jig is involved and if special technical features of this device are claimed).

Informative references
Attention is drawn to the following places, which may be of interest for search:

Destroying solid waste or transforming solid waste or contaminated solids into something useful or harmless

Reclamation of contaminated soil

Recovery of plastics or other constituents of waste material containing plastics; Separating plastics from other materials

Fertilisers from household or town refuse

Preparation of fertilisers characterised by the composting step

Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal by extraction

Solid fuels

Solid fuels essentially based on materials of non-mineral origin on sewage, house, or town refuse

Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof

Incineration of waste

Apparatus or processes specially adapted to the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps

Feed or discharge devices integral with washing or wet-separating equipment (filling or emptying devices per se B65G 65/30)
Definition statement
This group covers:

All kind of feeding and discharging arrangements, like rotary feeder, scraper, screw or lifting wheel discharger for washing or wet separating apparatus.

Control arrangements specially adapted for wet-separating apparatus or for dressing plant, using physical effects (detecting, measuring, or analysing devices G01 ; control devices in general G05)
Definition statement
This group covers:

E.g. control arrangements adapted for flotation plants as classified in B03D.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Sorting according to a characteristic or feature of the articles of material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches

Detecting, measuring, or analysing devices

Control devices in general

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Last Modified: 10/11/2013