US841841A - Tubular ball-mill. - Google Patents

Description

No. 841,841.l PATENTED JAN. 22, 190.7.

N0.841,841. l PATLNTBD'JAN 22, 1907.

M. RABBL. 1

TUBULAR BALL MILL. APPLICATION FILED SEPT. 21. 1906.

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No. 841,841, PATBNTBD JAN. 2z, 1907.

M. F. ABBB. l

TUBULAB BALL MILL.

APPLIOATLON FILED SEPT. 21. 1906.

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W7 IMQ a das MAX F. ABBE, oF,

rArENT OFFICE.

NEW YORK, N. Y.

TUBULAF: BALL-MILL.

To all whom it 771,(1/ 1/ concern,.-

Be it known that I, MAX F. ABB, a citiven of the United States, residing at New York city, Manhattan, county and State of New York, have invented new and useful Improvements in Tubular Ball-Mills, of which the following is a specification.

This invention relates to a tubular ballmill that revolves on hollow trunnions proj ecting outwardly from the heads of the mill and forming part of the feeding device.

By my invention the construction of the mill is simplified, its strength increased, and its length reduced Without a corresponding reduction of its capacity. v l g In the accompanying drawings, Figure 1 is a vertical longitudinal section of my im: proved mill; Fig. 2', a section through. the

A ingress-head on line 2 2, Fig. 1; Fig. 3, a

section through the egress-head on line' 3 3, Fig. 1; Fig. 4, a detail of the ingress-head liner; Fig. 5, a section on line 5 y5, Fig. 4; Fig. 6, a detail of the egress-head liner when the mill is set for dry-grinding; Fig. 7, a section on line 7 =7-, Fig. 6; Fig. 8, a longitudinal section of a modification'of the egress-head; Fig. 9, a section on line 9 9, Fig. 8.; Fig. 10, a detail of the egress-head cover; Fig. 11, a section on line 11 11, Fig. 10; Fig. 12,`a detail of a second egress-head cover; and Fig. 13, a section o n line 13 13, Fig. 1.2.

The ingress-head of the mill is composed of three integral parts-namely, a trunnion 20, a flanged end plate' 21, and a feed-spiral jor conveyer 22. The trunnion 2O is ]our naled in a support 23 and has a flaring `bore 24, into which enters Jfeed -pipe 25.. The flanged plate 2l constituting the head proper is provided with an inner partition 26, forming a feed-chamber 27, that communicates with the bore 24 of trunnion 20.` From the inner side of plate'26 extends the integral feed-spiral 22,' flanked by an integralannular plate 28. Chamber 27 -communicates with conveyer 22 through a number of peri heral openings 29 in partition 26, three o such openings being shown, Fig. 2. The lnnermost convolute 30 of conveyer 22 is flaring, so as to form a central discharge-funnel 31.

The ingress-head constructed as described` is so bolted to the cylindrical shell or body 32 of the mill that partition 26 closes against the shell 32, while conveyer 22, with its plate Specification of Letters Patent. Application filed September 21, 1906. Serial No. 335,557.

28, projects into the same. The means for Patented Jan. 22, 1907. l

attaching the head to the shell consist of a flanged ring 33, fast on the shell and to which the flanged plate 21 of the head is bolted, as at 34.

To the inner face of the head are secured aA number of abutting sector-shaped liners 35, Figs'. 4 and 5, the inner beveled edges of Whichare engaged by an undercut kinwardlyextending annular flange 36 of plate28. At their outer ends the liners bear against the tubular lining 37 of shell 32, so that in this waythe liners are securely held in position. The egress-head of the mill is constructed in substantial conformity with the ingresshead. Thus the hollow trunnion 38 is made integral with aanged plate 39, carrving the spirals of the conveyer 40, the latter being in turn flanked by the inner plate 41. The trunnion 38 is journaled in the support 42 and communicates with the innermost ilaring convolute of conveyer 40.

The egress-headv is attached to shell 32 by means of bolts 43, engaging a flanged ring 44, fast on the shell. The inner plate. 41 of the head has the undercut flange 45, that overlaps the beveled inner edges of the sector-shaped liners 46. Alined openings 47 48 in rlates 41 and 39, respectively, are adapted to e closed by covers 49 and 50, connected by 'a screw-bolt 51.

In dry-grinding, Figs. 1-7, the interior of shell 32'communicates with the outer convolute of conveyer by means of a series of peripheral slits 52 in plate 41, alined with corresponding slits 53` in linersv 46. During the normal operation ofthe millthe material l robe ground passes fromfeed-pipe 25 through hollow trunnion 20,v chamber `27, and openings 29 to conveyer 22, shell 32.

The material reduced by the pebbles 54 passes through openings 53 52 to conveyer 40 to be thence discharged from hollow trunnion 38. When-the pebbles are to be vremoved or the mill is to be emptied entirely,

cover 49 is opened, so that the contents ofthe that carries it into mill will be fed out' of shell 32 by conveyer 40.

For wet-grinding, Figs. 8-13, the peripheral openings in plate 441 are replaced by a central opening -55. This opening is protected by a grate or erforated plate 5,6 and discharges the pulp through pipe 57, having cock 58, by means of which the. outflow is regulated. If the :millv is to be emptied oi its pulpy contents, cover 49 is removed and replaced by a cover 59, Fig. 12, having openings that permit the passage of the 1kpulp, but prevent the passage of the peb les. As shown, cover 59 has openings 6()VJ and mutilated or ilat sides 61, so that segmental discharge-orices are formed at the top and.

bottom of the cover.

Itwill be seen that in both heads of the mill the flanged plates 'forming the heads propell are made integral with the hollow trunnions. So also is each head provided' with an integral spiral thread, which serves the double purpose of constituting a reinforcing-rib and of forming a conveyer for the material fed into o1' out of the mill. In this way the construction of the mill is simplified, while its strength is increased. Furthermore, the waste space heretofore formed by the reinforcing-ribs of the heads is utilized for the feeding device, so that the lengthof the mill is eorrespondinglyreduced without diminishing its capacity.

1. In altubular ball-mill, a head composed of a flanged end plate, an integral hollow trunnion extending outwardly therefrom, a spiral conveyer extending inwardly therefrom, an inner plate having a beveled ange, and beveled sector-shaped liners engaging `said flange, substantially as specified.

tan, New York, this th day of September,

MAY F. ABBE. Witnesses:

FRANK v. BRIESEN, W rLLIAM SCHULZ.

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