A mill and operating method for using grinding bodies for grinding a grinding stock. Grinding bodies that have passed through the through the product outlet enter an upwardly inclined discharge pipe from where, when the grinding body mill is at a standstill, the grinding bodies are directed out of the discharge pipe through the product outlet into a rotor body of the separating device. When operation of the grinding body mill is resumed, the grinding bodies are conveyed back into the grinding chamber owing to the rotation of the rotor body.

A discharging device for mills, comprising: a conduit (10), structured so as to be connected to a discharge opening (3) of a mill (1); a bend (11) disposed along the conduit (10), which defines a curve of the conduit (10); a regulating device (12) associated to the bend (11) and predisposed for varying the position of the bend (11) so as to vary at least a height thereof.

Provided is a method of producing pellets of a graphene-polymer composite, the method comprising: (a) mixing multiple particles of a graphitic material and multiple particles of a solid polymer carrier material to form a mixture in an impacting chamber of an energy impacting apparatus; (b) operating the energy impacting apparatus with a frequency and an intensity for a length of time sufficient for peeling off graphene sheets from the graphitic material particles and transferring the graphene sheets to surfaces of the solid polymer carrier material particles to produce graphene-coated polymer particles inside the impacting chamber; and (c) feeding multiple graphene-coated polymer particles into an extruder to produce filaments of an extruded graphene-polymer composite and operating a cutter or pelletizer to cut the filaments into pellets of graphene-polymer composite. The process is fast (hours as opposed to days of conventional processes), environmentally benign, cost effective, and highly scalable.

A method of improving grinding, grading and capacity of ores by reducing a fineness content ratio ?.sub.0 in settled ores includes providing a two-stage ore grinding and grading system including a first fully closed circuit including a grinder and a hydrocyclone, or a two-stage ore grinding and grading system including a first-stage open circuit, and controlling parameters for ore grinding and grading as follows: controlling a dc an value of a point B on a separation cone of a second-stage ?500 mm hydrocyclone; controlling a fineness content ratio ?.sub.0 in settled ores; controlling a second-stage ore grinding and grading load Q.sub.2; and acquiring a first-stage grinding, grading and capacity Q of ores.

An agitator ball mill comprises agitating discs (18) on an agitating shaft, wherein two adjacent agitating discs (18) are bounding a grinding cell, respectively. The agitating discs (18) comprise grinding material passage openings (28) which are only arranged in the immediate proximity of a grinding chamber inner boundary (19), which connect adjacent grinding cells, and which have a radially outer boundary that has a distance R28 starting from the grinding chamber inner boundary (19) in the radial direction of the agitating disc (18). For the ratio of the distance R28 of the radially outer boundaries of the grinding material passage openings (28) to a radial extension R18 of the agitating discs (18), the following condition applies: 0.05.Math.R18R280.25.Math.R18. Otherwise the agitating discs (18) are closed.

[Problem] To resolve segregation of grinding media to thereby enable a large-flow-rate circulation operation while reducing wear of an agitating member and a grinding media separating member. [Solution] In a media-agitation type pulverizer, the agitating means comprises: a circular plate-shaped hub member (26) fixed to an end of a rotary drive shaft located inside a grinding chamber, wherein the rotary drive shaft extends front the side of one end of the grinding chamber into the grinding chamber; an annular end plate (28) disposed in spaced-apart relation to the hub member in an axial direction of the rotary drive shaft; a plurality of agitating members (30) fixed between the hub member and the end plate at circumferential intervals, in a posture where each of them protrudes radially outwardly from respective outer peripheries of the hub member and the end plate; and a plurality of grinding media scraping-out members (31) each extending radially inwardly with respect to the outer peripheries of the hub member and the end plate, wherein an open region as a part of an outer periphery of the agitating means other than thicknesses of the agitating members and the grinding media scraping-out members is formed as a grinding media circulation opening (22a) for circulating the grinding media from an inside to an outside of the agitating means, and wherein an area ratio of the grinding media circulation opening to a circumferential plane between opposing surfaces of the hub member and the end plate of the agitating means is set to 50 to 90%.

An agitator mill having a circular-cylindrical outer stator and an agitator having a circular-cylindrical rotor. The rotor is arranged within the outer stator, and a milling chamber between the rotor and the outer stator. In the milling chamber, a through-flow direction which extends from a feed channel to a discharge channel. Several rotor milling tools are attached to the rotor, wherein several outer-stator milling tools are attached to the outer stator. The outer-stator milling tools are arranged adjacent to and in the circumferential direction and form rows. These rows are arranged parallel to one another on the outer stator. On the side, facing away from the feed channel the outer-stator milling tools of at least one row have a greater radial length than the other outer-stator milling tools. The outer-stator milling tools of each row in the circumferential direction each have the same length.

In some embodiments, a gravity aided grinding mill apparatus may include an intake for receiving a grinding media and a grindable material. A first elongated runner may be in communication with the intake, and a first doubleback coupling may be in communication with the first elongated runner. Grinding media and grindable material may travel in a first direction across the first elongated runner into the first doubleback coupling and the first doubleback coupling may change the direction of travel of grinding media and grindable material into a second direction. A second elongated runner may be in communication with the first doubleback coupling, and the second elongated runner may receive the grinding media and grindable material traveling in the second direction from the first doubleback coupling. The grinding media and grindable material may be communicated from an output and across a grizzly screen.