A mixing blade for a mixer for concrete, mortar, powders, dry or semi-dry granulates, mixtures with a cement base or similar or comparable mixtures or mixes comprises a shank which develops along a longitudinal axis and a mixing wall connected inclined to one end of said shank, transverse to the longitudinal axis. The mixing wall comprises, on one side of the longitudinal axis, a first front mixing plate, and on an opposite side, a second front mixing plate angled backward toward the longitudinal axis with respect to the first front mixing plate, by an angle of inclination of the plate.

An apparatus for processing a quantity of glass melt comprises a segmented tube including a first tube segment and a second tube segment. A second end portion of the first tube segment is joined to a first end portion of the second tube segment. In further examples, methods of fabricating a segmented torsion tube include joining together segmented torsion tubes at an integral solid-state joint.

A powdery material mixing degree measurement device includes a discharger configured to discharge mixed powdery materials to a filler configured to fill, with the powdery materials, a vertically penetrating die bore of a compression-molding machine including a table including the die bore, a slidable lower punch including an upper end inserted to the die bore, and a slidable upper punch including a lower end inserted to the die bore, a plurality of movable portions configured to move the mixed powdery materials to the discharger, and a sensor configured to measure a mixing degree of the mixed powdery materials in the movable portions.

A paint container lid assembly for a standard paint container includes an opening with a threaded adapter ring and a removable threaded cap. A pour spout/funnel includes a tubular lower portion having an internally threaded end to removably engage the adapter ring. The upper portion of the spout/funnel comprises a coffer-like body having an elongated opening. A spout/funnel cap is slidably secured to the spout/funnel to close the entire spout/funnel upper opening or partially unblock the opening to meter and control the rate of outflow of paint.

Apparatus for processing kitchen waste is disclosed. In some embodiments, the apparatus comprises an inlet for receiving the kitchen waste, a comminuter to comminute the received waste, a dewatering device to dewater the comminuted waste, a compressor to compress the dewatered comminuted waste, and an outlet to provide processed waste ready for collection, wherein the inlet has a lid moveable between a closed position and an open position and the inlet communicates with a hopper having an outlet, the hopper outlet communicating with the comminuter by a door mechanism, and wherein the door mechanism and the lid are interlocked such that the door mechanism opens to supply food waste to the comminuter only when the lid is in the closed position and such that the lid is openable to allow a user to add food waste into the hopper only when the door mechanism is closed.

Methods and a slaker for removal of heavy grit during batchwise slaking of burnt lime in a slaker (2) for the production of lime slurry with a high degree of fineness and prolonged sedimentation time are described, where the following processing steps are carried out during the slaking process: a)—reduction of the stirring of the slaker (2) from a normal stirring speed to a lower stirring speed, b)—opening of an upper inlet valve (60) in a collector (70) mounted in the lower part (54) of the slaker (2) to lead sinking grit in the slurry batch to the collector (70), whereupon the upper inlet valve (60) is closed after a given time period, c)—increase the stirring in the slaker (2) back to the normal stirring speed, d)—after a given time period with normal stirring speed, a regulating valve (22) in the lower part (54) of the slaker (2) is opened for emptying of a batch of slurry to an external storage tank (3), and e)—when said regulating valve (22) is opened for emptying of a batch of slurry, a lower outlet valve (62) in the collector is optionally opened for emptying of collected grit.

Techniques or processes for efficiently producing concrete using dynamic feedback are disclosed. A concrete plant can use a control system to manage concrete production based on the dynamic feedback. The dynamic feedback can control mixing of concrete ingredients so as to yield uniform particle distribution for the concrete ingredients. The dynamic feedback can also avoid overflow situations as well as yield improved loading of the resulting concrete into a concrete transport vehicle (e.g., concrete truck).

An agitating bar and an agitator including the same are provided. The agitating bar includes a barrier unit in addition to a rotating shaft, and an impeller unit. Therefore, the agitating bar can be useful in preventing the stream of a fluid which flows rapidly toward a fluid outlet port in a state in which the fluid is not mixed uniformly around the rotating shaft, thereby enhancing agitation efficiency and a degree of homogenization for the mixed fluid.

The present invention relates to an in-line mixing apparatus and use therein for adding a polymer solution and dewatering an aqueous mineral suspension. Said method comprises statically mixing the aqueous mineral suspension with a poly(ethylene oxide) (co) polymer to form a dough-like material. The viscous mixture material is then dynamically mixed in an in-line reactor 40 to reduce the mixture viscosity and to form microflocs and release water. Said method is particularly useful for the treatment of suspensions of particulate material, especially waste mineral slurries, especially for the treatment of tailings and other waste material resulting from mineral processing, in particular, the processing of oil sands tailings.

The invention relates to a stirred tank reactor for gas-liquid mass transfer in a slurry. The reactor includes a reactor tank (1) having a first volume (V.sub.1), a drive shaft (2) that extends vertically in the reactor tank, a motor (3) for rotating the drive shaft (2), a main impeller (4) which is a downward pumping axial flow impeller attached to the drive shaft (2) to create a main flow pattern in the reactor tank, and a gas inlet (5) arranged to supply gas into the reactor tank (1) to be dispersed to the liquid. The reactor includes a mechanical gas sparging apparatus (6) comprising a dispersion chamber (7) having a second volume (V.sub.2) which is substantially smaller than the first volume (V.sub.1) of the reactor tank (1), the dispersion chamber being arranged coaxial with the drive shaft (2), and the gas inlet (5) being arranged to feed gas into the dispersion chamber (7), and mixing means (8, 9, 10, 11, 12) arranged within the dispersion chamber (7) for mixing the gas into liquid by dispersing the gas to fine bubbles before the bubbles enter the main flow pattern. The mixing power per unit volume inside the dispersion chamber (7) is significantly larger than the mixing power elsewhere in the reactor.