Provided is an organic nanoparticle production method comprising a step in which a mixture of beads having an average particle size at least 0.15 mm and no more than a value (mm) calculated by the formula 1.07−0.11×[outer peripheral speed of the stirring rotor (m/sec)] and a slurry containing organic particles is stirred by a stirring rotor rotating at an outer peripheral speed of 7 m/sec or less in a vessel of a wet bead mill.

A large sized opaque quartz glass ingot having an excellent heat ray shielding property, an outstanding light blocking property, high mechanical strength and small roughness of a baked finished smooth surface.

The shape of bubbles inside the quartz glass are almost complete spheres and the average particle size of the bubbles is 1 μm or less, such that the strength of the opaque quartz glass ingot is increased as the stress concentration at the edges of the bubbles is eliminated and an increase of surface roughness caused by baking is alleviated.

A large sized opaque quartz glass ingot having an excellent heat ray shielding property, an outstanding light blocking property, high mechanical strength and small roughness of a baked finished smooth surface.

The shape of bubbles inside the quartz glass are almost complete spheres and the average particle size of the bubbles is 1 μm or less, such that the strength of the opaque quartz glass ingot is increased as the stress concentration at the edges of the bubbles is eliminated and an increase of surface roughness caused by baking is alleviated.

Methods and apparatuses for producing spherical metallic powders through continuous ball milling are described. The apparatus comprises a comminution component including an inlet to receive a metallic material at a first region within the comminution component and an outlet to dispense the metallic powder from a second region within the comminution component. The apparatus further comprises a plurality of grinding components to grind the metallic material, the plurality of grinding components being arranged within the comminution component. The apparatus comprises a drive component, connected with the comminution component, to induce movement of the metallic material and the plurality of grinding components within the comminution component such that the metallic material is fragmented through contact with the plurality of grinding components at the first region and an external surface of the fragmented metallic material is altered at the second region to produce the metallic powder.

A freely moving grinding media adapted to measure one or more physical characteristics of a comminution apparatus during operation or a charge therein is disclosed. The grinding media comprises a freely moving grinding body with a bore disposed in an outer body portion of the body. A sensor body is configured to be received in the bore. The sensor body comprises a rigid sleeve, a resilient core and a sensor array embedded in the core of resilient material. A system of optimising performance of a comminution circuit is also disclosed. The system comprises a comminution apparatus in response to one or more physical characteristics of the comminution apparatus or the charge contained therein, measured during operation of the comminution apparatus. The system comprises a plurality of the freely moving grinding media. A method of optimising performance of a comminution circuit is also disclosed.

A freely moving grinding media adapted to measure one or more physical characteristics of a comminution apparatus during operation or a charge therein is disclosed. The grinding media comprises a freely moving grinding body with a bore disposed in an outer body portion of the body. A sensor body is configured to be received in the bore. The sensor body comprises a rigid sleeve, a resilient core and a sensor array embedded in the core of resilient material. A system of optimising performance of a comminution circuit is also disclosed. The system comprises a comminution apparatus in response to one or more physical characteristics of the comminution apparatus or the charge contained therein, measured during operation of the comminution apparatus. The system comprises a plurality of the freely moving grinding media. A method of optimising performance of a comminution circuit is also disclosed.

Provided are processes of preventing or eliminating caking of particulate materials during milling operations. Processes include the addition of an anti-caking additive such as a rosin, abietic acid, fatty acid, or derivative of any of the foregoing to a mill prior to or along with a particulate chemical, and milling the combination. The addition of the anti-caking additive prevents or reduces the amount of caking observed thereby increasing yields and maintaining or enhancing the resulting properties of the milled product.

Provided are processes of preventing or eliminating caking of particulate materials during milling operations. Processes include the addition of an anti-caking additive such as a rosin, abietic acid, fatty acid, or derivative of any of the foregoing to a mill prior to or along with a particulate chemical, and milling the combination. The addition of the anti-caking additive prevents or reduces the amount of caking observed thereby increasing yields and maintaining or enhancing the resulting properties of the milled product.

A feed system for feeding grinding bodies to a vertical mill includes a pumping unit for sucking a propulsion liquid from a source and for supplying the liquid under pressure into a discharge tube. The system includes an intake connection having an inlet for grinding bodies, an inlet for propulsion liquid, connected to the discharge tube, and an outlet for grinding bodies and propulsion liquid. A principal tube is connected to the outlet of the intake connection for receiving the propulsion liquid and grinding bodies from the tubular intake connection. A static screen is arranged in the feed of the vertical mill for separating grinding bodies from propulsion liquid, the static screen having an inlet for propulsion liquid and grinding bodies, connected to the principal tube, an outlet for grinding bodies to be fed to the vertical mill, and an outlet for propulsion liquid separated from the grinding bodies.

A feed system for feeding grinding bodies to a vertical mill includes a pumping unit for sucking a propulsion liquid from a source and for supplying the liquid under pressure into a discharge tube. The system includes an intake connection having an inlet for grinding bodies, an inlet for propulsion liquid, connected to the discharge tube, and an outlet for grinding bodies and propulsion liquid. A principal tube is connected to the outlet of the intake connection for receiving the propulsion liquid and grinding bodies from the tubular intake connection. A static screen is arranged in the feed of the vertical mill for separating grinding bodies from propulsion liquid, the static screen having an inlet for propulsion liquid and grinding bodies, connected to the principal tube, an outlet for grinding bodies to be fed to the vertical mill, and an outlet for propulsion liquid separated from the grinding bodies.