Patent · US Active

Apparatus and method for classifying and dedusting granular polysilicon

US10335832B2 · kind B2 · utility

1Cited by

9References

20Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Michael Fricke · Burghausen, DE
Martin Brixel · Stilln, DE
Robert Enggruber · Burghausen, DE
Rainer Hauswirth · Haag in Oberbayern, DE

Key dates

Filing date	Apr 1, 2016
Grant date	Jul 2, 2019
Priority date	—
Expiry date	Apr 1, 2036

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01B33/037
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Granular polysilicon is fed into a screening plant, divided into two or more fractions by means of one or more screen surfaces, and thereby classified and dedusted wherein a throwing motion of the granular polysilicon in the screening plant removes adhering dust particles from the granular polysilicon, the removed dust particles are taken off from the screening plant by means of a gas flow supplied to the screening plant, and the screening plant is of gas-tight design and supply and takeoff of the gas flow are effected such that the screening plant is at a positive pressure compared to the surroundings.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.