US1534000A - Ball-mill lining - Google Patents

Description

- April 14, 1925.

R. H. BAKER 7 BALL MILL vLININGr Fild Jan. 31', 1925 Patented Apr. 14, 1925.

UNITED STATES PATIENT OFFICE.

RAYMOND H. BAKER, OF NEW YORK, N. Y., ASSIGNOR T0 TAYLOR-WHARTON IRON AND STEEL COMPANY, OF HIGH BRIDGE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

BALL-MILL LINING.

Application filed January 31, 1923. Serial No. 616,076.

To all whom it may concern:

Be it known that I, RAYMOND H. BAKER, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Ball-Mill Linings, of which the following is a specification.

The linings of grinding mills which utilize balls, pebbles and kindred fugitive grinding elements, are subject to rapid wear and mustbe renewed or replaced from time to time. lVith present linings this is more or less of an awkward proceeding entailing much time and labor.

Objects of my invention are to provide a lining of high efficiency; to provide a lining of simple construction and which will outlast any lining heretofore proposed; to provide a lining which will remain tight under all conditions of service; to provide a lining including main wear resisting elements in the form of rails; to provide a lining of the character specified in which the rails, including head and base, are solid and of considerable depth; to provide a lining of the character specified in which the base flanges of the rails co-operate with adjustable locking prhvisions; to provide a lining of the character specified in which the locking provisions are of such nature as to provide for uniform spacing of the rails and eventual joint wear with the rails; to provide a lining of the character specified in which the heads of the rails overhang the intermediate locking bar and temporarily guard the same during the assemblage of the parts; to provide a lining of the character specified in which, after the heads of the rails are worn away, the remainder, consisting of rail bases and locking bars, will wear uniformly actually to the shell; and'to provide a rail linin'g such as indicated whereofthe rails are so formed and so co-related as to provide trapping areas for trapping ore or other material undergoing grinding which accordingly takes some of the wear and so prolongs the life of thelining.

With such and other objects in view, the nature, characteristic features and scope of the invention will more readily be understood from the following description beveled flanges of the rails.

taken in connection with the accompanying drawing, forming a part hereof, wherein, Figure l'is a fragmentary cross-sectional viegv of a lining "embodying my invention; an

Fig. 2 is a perspective View of one of the rails and its complemental locking and spacing bar in detached relation.

According to my invention rails in steel, with a substantially large head 5 and a broad bearing base 6. The tops of the rails are flat and present considerable surface area for grinding purposes. The sides extend vertically a short distance and are then inwardly directed to where they join the base. The latter has flanges 7 the side walls of which are beveled as at 8.

(lo-operating with the rails for properly spacing and locking them are wedge elements consisting of plates or bars 9 with lateral bevels'10' corresponding to the The bars 9 have countersunk bolt holes 11 to accommodate the locking bolts 12 which extend through the shell 13 and are secured by nuts 14;. Evidently, by tightening up on the nuts the wedge elements 9 will bear down upon the rail flanges and maintain the proper spacing and rigidity of the rails essential for efficient grinding. The adjusting plates or elements 9 are substantially the thickness of the base flanges and when fully seated their tops are flush with the tops of the flanges. It will be noted that the heads of opposite rails overhang the plates 9 and this is of advantage in the assemblage of the parts in the temporary support of said plates.

The rails are so co-related with respect to their lateral shapes that the spaces between them afford means for trapping ore or other material undergoing grinding which, without interfering with the adjusting means,

I becomes tightly packed or wedged between the rails and thus shares some of the wear and so prolongs the life of the lining.

Since the rails are mates and the locking" bars are likewise mates, the lining is structurally simple and can be assembled with little loss of time and labor.

paratively slowly and even when the heads are completely worn away the lining will still function for an appreciable period 0wing to the fact that the rail bases are solid or intact and will wear uniformly with the locking bars all the way to the shell.

Having described my invention, I claim 1. In combination with the shell of a grinding mill, separable lining elements of substantial keystone shape in cross section, the extended bases of which are arranged The rails being of considerable depth" and grinding surface area will wear com-.

in contact with the shell, with the narrower portions of substantial depth and thickness, and means cooperating with the edges of adjacent bases for securing said linings in place, said means having wedging engage- ,rnent with such bases and presenting substantial. continuations of such bases when the parts are assembled.

2. In combination with a shell of a grinding mill, longitudinally arranged independent lining elements having broad bases with undercut walls, and bars with edges to cooperate with and exert wedging action on such undercut walls, said bars being removably secured between adjacent lining elements, and forming practical continuation of such bases when in securing relation to the shell. 7,

In testimony whereof I aflix my signature.

RAYMOND H. BAKER.

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