A mixing device includes a holder and a mixing element. The mixing device has a central axle and rotates in relation to the holder about an axis of rotation which coincides with the central axle. The mixing element includes an axle body and a plate-shaped mixing body. The mixing element further includes a plate-shaped wearing body, and connecting elements. The shanks of the connecting elements respectively extend through or at least into associated mutually aligned first holes in the wearing body and second holes in the mixing body. The mixing body is provided with recesses in the middle of which the associated second holes are provided, wherein parts of the wearing body that surround the first holes extend within the recesses.

A mixing device includes a holder and a mixing element. The mixing device has a central axle and rotates in relation to the holder about an axis of rotation which coincides with the central axle. The mixing element includes an axle body and a plate-shaped mixing body. The mixing element further includes a plate-shaped wearing body, and connecting elements. The shanks of the connecting elements respectively extend through or at least into associated mutually aligned first holes in the wearing body and second holes in the mixing body. The mixing body is provided with recesses in the middle of which the associated second holes are provided, wherein parts of the wearing body that surround the first holes extend within the recesses.

A liner element for lining a vertical grinding mill agitator including one or more primary mounting portions configured to releasably mount the liner to a shaft of the agitator; and one or more secondary mounting portions configured to releasably mount one or more wear members to the liner. A liner segment including the liner element and at least one wear member is also disclosed.

A liner element for lining a vertical grinding mill agitator including one or more primary mounting portions configured to releasably mount the liner to a shaft of the agitator; and one or more secondary mounting portions configured to releasably mount one or more wear members to the liner. A liner segment including the liner element and at least one wear member is also disclosed.

A control system for mixing materials having a container to receive the materials, agitators, a driveline to drive the agitators at an output speed with an output torque, an power source to provide an input speed with an input torque, a continuously variable transmission that connects the driveline and the power source, and an electronic control unit configured to adjust a speed ratio of the continuously variable transmission to provide a linear relationship between the input torque and the output torque with a slope, when the input torque is below a control input threshold, and to follow a corrected linear relationship between the input torque and the output torque with a corrected slope smaller than the slope when the input torque is above the control input threshold.

The problem of providing a stirrer capable of more effectively shearing a fluid to be treated is addressed, by using the action of an intermittent jet stream. A stirrer is provided with a rotor having a blade and a screen, which are relatively rotated such that the fluid to be treated is discharged from the inside of the screen to the outside as an intermittent jet stream through a slit in the screen, the stirrer satisfying condition 1 and condition 2. (Condition 1) the relationship among the width b in the rotating direction of a tip part of the blade, the width s in the circumferential direction of the slit, and the width t in the circumferential direction of the screen member is b2s+t. (Condition 2) the relationship between the width b in the rotating direction of the tip part of the blade and the maximum inner diameter c of the screen is b0.1c.

Systems and methods of producing a frozen food product include dosing ingredients with a liquefied gas while mixing the ingredients using self-cleaning interlocking beaters. The beaters are optionally also disposed to clean a container in which the ingredients are frozen. The rate and amount of cooling is controlled by measuring the quantity of liquid nitrogen, measuring viscosity of the frozen food product, measuring temperature, and/or the like.

A high shear mixing device is provided. The high shear mixing device comprises a first screw kneader and a second screw kneader; a first rotation driving mechanism configured to rotate the first screw kneader and a second rotation driving mechanism configured to rotate the second screw kneader; a revolution driving mechanism including the first rotation driving mechanism and the second rotation driving mechanism rotatably installed therein; a driving mechanism body including the revolution driving mechanism installed therein; and a mixing tank. Each of the first screw kneader and the second screw kneader comprises a shaft having one end connected to the rotation driving mechanism; and three or more blades having one end fixed to the shaft and having a helically curved body along the longitudinal direction of the shaft, and the first and second screw kneaders rotate in opposite directions with their blades overlapping each other.

Methods and apparatus are disclosed for mixing proppant and other solids with one or more fracturing fluids to form a fracturing slurry, and for delivering the fracturing slurry to a wellbore. In the example systems as described herein, the proppant is mixed with the fracturing fluids through an assembly that limits the number of pumps that are required to move the relatively abrasive proppant]containing fluids. Additionally, in the example systems, the proppant is mixed within enclosed structures, thereby minimizing the escape of dust and other particulates into the surrounding atmosphere and onto the equipment at the well site.

An elevating feed mixing system and method are provided. The system includes a support frame and a raisable platform raisable relative to the support frame. A mixing tub disposed on the raisable platform is configured to receive constituent ingredients of a feed and further configured to raise to release the feed after it is mixed.