EP 0290840 A3 19900110 - GAP-BALL MILL FOR CONTINUOUSLY GRINDING, ESPECIALLY DISINTEGRATING MICROORGANISMS, AND DISPERSING SOLIDS IN FLUIDS
Title (en)
GAP-BALL MILL FOR CONTINUOUSLY GRINDING, ESPECIALLY DISINTEGRATING MICROORGANISMS, AND DISPERSING SOLIDS IN FLUIDS
Publication
Application
Priority
DE 3716295 A 19870515
Abstract (en)
[origin: US4824033A] Three mill units are mounted axially in series in a mill housing with a cover. Each mill unit has a rotor disc between two stator discs. The rotor discs are secured to the rotor shaft at their radially interior region. The stator discs are secured to the housing wall at their radially outer region. Individual pulverization gaps are formed between the stator discs, which gaps run around the rotor discs and in longitudinal cross section extend sequentially with a serpentine shape. The outer parts of the pulverization gaps form individual gap loops the inner ends of which are connected or "short-circuited" via ball return channels. During operation, the grinding elements are accelerated outward by centrifugal forces, and are concentrated into the gap loops. The grinding elements in each of the individual stages may be kept separated from the grinding elements in other stages; and they may have different sizes from stage to stage. The individual mill stages can be replaced as units. Alternatively, the rotor discs and stator discs which are rotationally symmetric can be replaced individually. They can have different axial cross sections, containing a single bend or multiple bends. The processing pressure for the material being pulverized which is passed through the serpentine pulverization gap system can be set accurately based on the rotational speed (rpm), so that microorganisms are recovered without the hyaloplasm leaking out or being worked into (i.e. intermixing with or being forced into intercalation with) the other materials.
IPC 1-7
IPC 8 full level
B01F 7/00 (2006.01); B02C 17/06 (2006.01); B02C 17/16 (2006.01); B01F 5/00 (2006.01)
CPC (source: EP US)
B01F 27/272 (2022.01 - EP US); B02C 17/166 (2013.01 - EP US); B01F 2025/911 (2022.01 - EP US)
Citation (search report)
- [X] DE 1913147 A1 19700924 - NETZSCH MASCHINENFABRIK
- [A] DE 3245825 A1 19840614 - BUEHLER AG GEB [CH]
- [A] US 2042254 A 19360526 - MANUEL GODINEZ
- [A] US 3511447 A 19700512 - BRIZON JEAN MARIE ANNIC
- [AD] DE 3526724 A1 19870129 - ENGELS KASPAR
- [AD] CH 639567 A5 19831130 - FRYMA MASCH AG [CH]
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI NL
DOCDB simple family (publication)
EP 0290840 A2 19881117; EP 0290840 A3 19900110; EP 0290840 B1 19930623; AT E90886 T1 19930715; DE 3716295 A1 19881124; DE 3881955 D1 19930729; JP 2652194 B2 19970910; JP S63302962 A 19881209; US 4824033 A 19890425
DOCDB simple family (application)
EP 88106483 A 19880422; AT 88106483 T 19880422; DE 3716295 A 19870515; DE 3881955 T 19880422; JP 11501188 A 19880513; US 18980188 A 19880503