Methods for reducing moisture content of alkaline earth metal carbonate may include introducing alkaline earth metal carbonate having a moisture content ranging from about 0.1% by mass to about 10% by mass into a primary crusher and operating the primary crusher to obtain alkaline earth metal carbonate particles having a top cut particle size d.sub.90 of 90 microns or less. The method may also include introducing the particles into a primary grinder and operating the primary grinder to obtain reduced-size alkaline earth metal carbonate particles having a median particle size d.sub.50 of about 60 microns or less. The method may further include introducing the reduced-size particles into a classifier mill and operating the classifier mill to obtain further-reduced-size alkaline earth metal carbonate particles having a median particle size d.sub.50 of about 12 microns or less, and a moisture content of about 0.15% by mass or less.

An energy-saving double-bearing vertical grinding mill for dry grinding and shaping, comprising a shell, a permanent magnet variable frequency motor arranged above the shell, a rotating shaft connected with the output end of the permanent magnet variable frequency motor, and a double-spiral rotor arranged on the rotating shaft, wherein a grinding chamber is formed in the shell, wherein an upper bearing and a lower bearing are respectively arranged at top and bottom of the grinding chamber, wherein the upper bearing and the lower bearing are both sleeved on the rotating shaft and are respectively located at upper end and lower end of the rotating shaft, wherein the upper bearing and the lower bearing are both rotatably connected with the rotating shaft, wherein the grinding chamber is filled with a grinding medium.

An energy-saving double-bearing vertical grinding mill for dry grinding and shaping, comprising a shell, a permanent magnet variable frequency motor arranged above the shell, a rotating shaft connected with the output end of the permanent magnet variable frequency motor, and a double-spiral rotor arranged on the rotating shaft, wherein a grinding chamber is formed in the shell, wherein an upper bearing and a lower bearing are respectively arranged at top and bottom of the grinding chamber, wherein the upper bearing and the lower bearing are both sleeved on the rotating shaft and are respectively located at upper end and lower end of the rotating shaft, wherein the upper bearing and the lower bearing are both rotatably connected with the rotating shaft, wherein the grinding chamber is filled with a grinding medium.

A process for comminuting particles of heterogeneous material. The particles of heterogeneous material are fragmented and broken into smaller particle size by breaking them against each other. Heterogeneous material means two or more different solid materials or phases in the same solid. The component materials may have different specific gravity and/or hardness. In the process, a slurry of particles of heterogeneous material is pumped through an agitated mixture of impingement media, wherein the impingement media has a size greater than a size of the particles, wherein adjacent impingement media interact to create impingement zones through which the particles pass and impinge each other to cause the particles to fracture and break into smaller particles. The impingement media may be from 5 to 10 times larger than the particles. The impingement media may be harder than the particles. The heterogeneous material may be coal.

A method of manufacturing an inorganic material includes: a step (A) of preparing a first inorganic material as a raw material; a step (B) of obtaining a second inorganic material by crushing the first inorganic material using a ball mill to obtain fine particles of the first inorganic material, the ball mill including a cylindrical container and crushing balls; and a step (C) of separating the second inorganic material from the crushing balls to which the second inorganic material is attached, in which the step (B) includes a step (B1) of putting the first inorganic material and the crushing balls into the cylindrical container and subsequently rotating the cylindrical container about a cylindrical shaft and a step (B2) of moving the cylindrical container such that the first inorganic material moves in the cylindrical shaft direction.

A liquification system for an organic waste management system includes a hopper that is oriented vertically such that organic waste added to the hopper is biased by gravity toward a bottom end of the hopper; a fixed grinding plate disposed at the bottom end of the hopper and including grinding elements for grinding and liquefying organic waste; an agitator that is disposed within the hopper and is movable relative to the grinding plate in a first rotational direction that moves organic waste downward toward and against the grinding plate and in a second rotational direction that moves organic waste upward toward a top end of the hopper; a motor configured to selectively move the agitator in the first and second rotational directions under control of the controller; and an outlet through the bottom end of the hopper through which liquified organic waste drains from the hopper.

A silicon material can include a silicon aggregate comprising a plurality of porous silicon nanoparticles welded together. The silicon aggregate can optionally have a polyhedral morphology. A method can include: receiving a plurality of porous silicon nanoparticles and cold welding the plurality of porous silicon nanoparticles into an aggregated silicon particle.

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.

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.

The present invention relates to apparatus for simultaneous grinding and froth flotation of at least one crude mineral and/or pigment, a process carried out in the apparatus for manufacturing at least one ground mineral and/or pigment, use of the ground mineral and/or pigment bearing phase obtainable by the process in paper applications as well as in paper, plastics, paints, coatings, adhesives, sealants, food, feed, pharma, concrete, cement, cosmetic, water treatment and/or agriculture applications, preferably in a wet end process of paper machine, in cigarette paper, board, and/or coating applications, or as support for rotogravure and/or offset and/or ink jet printing and/or continuous ink jet printing and/or flexography and/or electrophotography and/or decoration surfaces and the ground mineral and/or pigment bearing phase or ground mineral and/or pigment obtainable by the process.