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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/group 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/group, 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 subclass/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 subclass/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 subclass/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 subclass/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 subclass/group 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 subclass/group 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 subclass/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 subclass/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 subclass/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 subclass/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 subclass/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