US1797597A

US1797597A - Magnetic separating machine

Info

Publication number: US1797597A
Application number: US386691A
Authority: US
Inventors: Ullrich Georg
Original assignee: Fried Krupp Grusonwerk AG
Current assignee: Fried Krupp Grusonwerk AG
Priority date: 1928-10-15
Filing date: 1929-08-17
Publication date: 1931-03-24
Anticipated expiration: 1948-03-24

Description

Patented Mar. 24, 19 1 UNITED STATES PATENT omen onone ULLBICH, or mennnune, eEnmANY, nssrenon ro 'rnE FIRM rampant? GR'QSONWERK AKTIENGESELLSGHAFT,

or MAGDEBUna-BgoKA GERMANY,

menn'rrc sn miaa'rme MACHINE Application filed August 17, 1929, Serial No.

My invention relates to machines for dressing and classifying ores and metallurgical waste products such as slags, sweepings and other residues by separating through magnetic force the more valuable parts from those not responsive to magnetism.

The invention relates more especially to'an improved feeding device for magnetic separating machine for the purpose set forth and of the type diagrammatically shownin the drawing in which a hollow cylindrical shell of. diamagnetical material rotate on a horizontal axis around the pole-shoes of a stationary field magnet.

Feeding devices for magnetic separating machines of this type are known by whi'ch the material under treatment is preliminarily classified through a vibrating sieve, the larger lumps which will pass over the sieve proceeding directly to the upper part of the rotary magnetic drum, while the finer granules dropping through the vibrating sieve and descending on a sloping chute under- 'neath the sieve will arrive at a lower section of the magnetic drum, where the latter presents an upwardly-revolving surface to the descending material.

In order to insure with magnetic separating machines of this type eflicient working of the rotary drum the'gapthrough which the material descends at the lower section of the drum 'must be comparatively narrow and in practice great difliculties havenbeen' found in keeping clear ahdimobstructed the passage forithe de'scendingmaterial. Particularly where the material under treatment is in a somewhat moist and sticky condition there is always a tendency of the said passage machine.

becoming choked, an occurrence WlllCll frequently interferes with the proper working of the feeding device and of th e rest of the The principal object of my invention is to overcome the said difiiculties and to provide an improved feeding'device for the purpose concerned which is safe against being choked and which is so simple in its design, that its principal member. can be provided at low cost and can be attached to advantage subsee quently to magnetic separating machines,

386,691, and in Germany Oetoberlfi, 1928.

having a feeding device of the old ferred to hereinbefore. I

Other objects of this invention will incidentally appear here'inaft V The nature and scope o the'invention are briefly outlined. in the appended claim andwill be more fully understood by the follow- 9 ing specification taken together with the ac; companying drawing.

In the latter a magnetic separating: machine for the purpose set forth and having an improved feedin device attached to it is diagrammatically s own by way of an example.

The material to be treated is dumped into a hopper 1 from which it passes by gravitational force over a vibrating sieve 2; the coarser lumps proceeding directly to the upper part of the magnetic drum 3, rotating in theldirection of arrow :0, while the finer gran-- ules drop into a chute 4.

According to this lnvention an auxiliary neath the deliver end of said chute 4, so as to rotate in the direction of arrow y, and is spaced from the magnetic drum 3 thus forming a bridge between the chute 4 and the magnetic drum 3.

feed roller 5 is rotatably mounted under- Extended experlments of mine have shown that the former troubles viz. clogging of the material inthe gap between the delivery end of the chute 4 and the magnetic drum 3 is effectively -prevented by the auxiliary feeding roller 5 described.

The valuable particles of the material responsive to magnetic attraction will be drawn upwardly by the rotary drum 3 while those parts not responsive to magnetic attraction drop into a rece tacle 6.

The coarser umps, proceeding from the sieve 2 directly to the upper part of the drum 3 are magneticall dressed in the usual way, the coarser valua le lumps dropping into a receptacle 7 jointly with the magnetic particles of the finer material, while the nonmagnetic lumps drop into -an endless con veyor 8 by which they are carried off -in order to be further classified by ha d.

Various changes and modlfications may 'be made in the construction and design of im-' 'ff proved devices of the type and for the purpose described above and in the assemblage and Cooperation of their component parts, without's'ubstantiall' departing from the spirit-and the salient i eas of my inven- 7 tion and without sjacrificin 'tag'esreierred to hereinb'e ore.

any of'the advan- For-exampleadjusting and setting devices of anyrconvenient type (not shown) may be provided-for adjusting and controlling in a manner known per se the effective distance of the feeding'roller 5- from the chute and v from the .magnetie'drum respectively, so as to adapt the function of the feedmg device per se in various branches of manufacture' to varying conditions.

Also means (not shown) for changing the rotary speed of the feed roller may be provided -forthe samepu'rpose viz. to'enable the operators to cope with Varying conditions and materials of difierent nature. am aware that feeding rollers are known and I make no claim except for their appli-' cation at .the specified place for cooperation with feeding devices of magnetic separating machines of the type set forth. a

What I claim is 5' In a magnetic separatingmachine for dressing and classifying ores and metallurgie cal waste products the combination with a stationary field magnet of a hollow drum hav mg an automatic eeding device comprising in combination a vibratory sieve adapted to preliminarily classify the material under treatment and to convey the coarser lumps to the upper part of "the rotary magnetic drum,

a chute arranged underneath said sieve'on which the finer material descends to a lower\ section oi the magnetic drum and a'rotary feeding roller arranged underneath the delivery end of the said chute and forming a bridge for the material, to be conveyed to the lower section of the magnetic drum.

In testimony whereofl have signed my name to this specification.

D Inc. H. e. GEQRG ULLBICH.