Abstract: A freely rotating rod or rods to be used in a high temperature rotary kiln, especially a cement kiln, to provide a combination of mixing and heat transfer is disclosed. The heat stable construction material and design of the rod permit heat in the kiln to be transferred more readily to the core of a feed material in a pyro-processing process, resulting in a more homogeneous end product.The rod has a unique and critical tapered structure of gradually enlarging transverse cross section. The rod, because of its tapered design, may be placed in the kiln oriented with the smaller cross section lying uphill to offset its tendency to travel downhill with the moving feed. The rod then remains generally stationary in its section of the kiln. Alternately, the rod may be sized and oriented so that it will travel through the kiln with the feed if such is desired. In the latter example, the degree of taper determines the speed of travel.

Abstract: A liner member for rotary drum-type mills comprises a resilient portion of wear, abrasion and impact resistant elastomeric material with a rigid plastic portion bonded to each side thereof. The liner member is specially adapted for mills which employ spaced lifter bars along selected interior surface portions of the mill with the liner member fitted between the lifter bars such that the resilient portion of the liner is disposed to protect the walls of the mill from wear, abrasion and impact while the liner is held in position by the lifter bars which bear against the two rigid portions bonded to the sides of the resilient portion.

Abstract: A mounting device for kiln hardware comprises two standards connected to the kiln wall and projecting inwardly through the refractory. One standard is connectable to the hardware through a removable pin. The hardware and the other standard are provided with cooperating means which prevent rotation of the hardware about the pin when the pin is installed. The members are designed so that removal of the pin allows removal and replacement of the hardware.

Abstract: A device for cooling castings and for treating moulding sand comprises a driven, rotatably journalled drum provided with internal catches extending substantially axially between an inlet end and an outlet end of the drum.For improving the stirring effect of the catches and for avoiding damage of castings and loss of valuable dust from the moulding sand, the catches have a stronger scooping effect near the inlet end than near the outlet end.

Abstract: A mill lining element is disclosed comprising a body of rubber having top and bottom surfaces and longitudinal side edges which extend in the direction of the axis of a mill shell. The body is reinforced by means of a metal plate covering the bottom surface and longitudinally extending metal bars attached to the metal plate adjacent the side edges thereof and extending through the body toward the top surface thereof.

Abstract: A centrifuge sieve has a support drum rotatable about an axis, a pair of axially spaced rings secured in the drum and centered on the axis, and an array of like sieve bars having radially inner surfaces defining a body of revolution centered on the axis. The bars each have opposite ends each in turn having two formations radially outside the body. One of these formations engages over and radially inside the respective ring and the other formation engages radially outside and under the ring. Thus the rings lie outside the body and underneath lateral projections serving circumferentially to space adjacent bars apart. The upper surfaces of the lateral spacing projections lie below the radial inner surfaces of the bars and at least one end of each bar is chamfered to reduce the change of material catching on the bar.

Abstract: In a mill drum provided with wear protective linings and ore lifting and carrying means in the form of longitudinal wings comprising an elastomeric material and extending radially inwardly from the lining of the mill drum an arrangement for securely attaching the wings to the walls of said mill drum, comprising at least two contiguous anchoring rods extending in the longitudinal direction of the bases of the wings through longitudinal holes made through the material of the wings, said anchoring rods passing through yoke means, which are recessed in the bases of the wings at a desired pitch or distribution along said bases and being connected to means for pressing the complete wing units against the drum of the mill and for retaining said wings in their mounted position.

Abstract: A multi-chambered scrubber is employed to thoroughly wash gravels or materials bearing heavy precious metals. The apparatus includes a multi-chambered scrubber drum which is supported at an angle by a frame and adapted to be driven by a variable speed drive system. The scrubber drum includes at least two sections each of which has a polygonal shaped, water-tight interior chamber. Each of the sections is separated by a retainer ring having an opening therein smaller in area than the area of the next preceeding scrubber chamber. The scrubber sections are interchangeable and may be connected one to the other in any of a variety of combinations as may be dictated by the material being scrubbed. The polygonal shape of the scrubber chambers contributes to a greatly improved washing and disintegrating action on the material being treated. The scrubber apparatus also includes a plurality of removable wear plates which can be replaced as they become worn down and damaged.

Abstract: A rotary kiln for producing an expanded clay product from clay or clay slate, the kiln having a lining provided with ribs. These ribs are built of refractory bricks partly reinforced. Each brick is preferably constituted by two portions, one of which is provided with reinforcing bars extending within and protruding from said portion. The protruding bars serve as guide for the second brick portion during the securing of the two brick portions to each other. The advantage of such a rib construction is that it allows an easy and cheap restoration of the rib when part of the rib is worn down without simultaneously necessitating a replacement of the lining.

Abstract: A barrel for use in treating workpieces, such as cleaning, scouring, deburring, etc., with abrasive blasting particles, high pressure fluid jets, etc. The barrel is intended to be rotated and includes a novel spiral flight which pushed workpieces through the barrel, a novel arrangement of drain holes for voiding the barrel of debris such as blast particles, flashings, cleaning fluid, etc., and includes novel turning cleats which cause workpieces to turn over within the barrel to expose various portions thereof to a blast stream of particles or fluid.

Abstract: A roller mill-bowl lining comprising a plurality of individual segments disposed adjacent to each other in an annular ring-like arrangement. The segments of the ring have the adjacent end portions thereof configured in an angular, interlocking shape so that upon the breakage of one of the segments the lining will not lift away from the mill bowl.