5results about How to "Avoid over grinding" patented technology

This utility model relates to the technical field of dental medical devices, and more particularly to a polishing head with interchangeable heads. It includes: a body with an internal drive motor and a speed-changing mechanism, the drive motor and the speed-changing mechanism being connected in a transmission connection; and a head, including a straight head and an elbow, which can be selectively and detachably connected to the front end of the body. The straight head or elbow has a working component inside, which is connected in a transmission connection to the speed-changing mechanism. The drive motor can drive the speed-changing mechanism to rotate, thereby rotating the working component. This utility model provides a polishing head with interchangeable heads. By using a detachable connection between the head and body, and allowing the straight head and elbow to be selectively connected to the front end of the body, users can easily select and quickly change between the straight and elbow heads according to their needs, thereby obtaining a larger operating space or a better operating field of vision.

The application relates to the technical field of abrasive equipment, in particular to a tank grinding barrel, which comprises a tank body, the tank body comprises an outer shell body, the outer shell body is internally provided with a containing cavity, an inner shell body is fixedly arranged in the containing cavity, and a gap is kept between the inner shell body and the containing cavity; wherein the inner shell body is internally provided with a grinding cavity capable of containing to-be-ground powder, a through discharge hole is arranged on the cavity wall of the grinding cavity, the two ends of the discharge hole are respectively communicated with the grinding cavity and the containing cavity, and powder with a particle size smaller than that of the discharge hole in the grinding cavity is moved into the containing cavity through the discharge hole; the technical problem that the particle size of part of the ground silicon carbide powder is too small is solved, and the technical effect that the particle size of the ground silicon carbide powder is avoided from being too small is achieved.

This invention belongs to the field of mineral resource recycling technology, specifically disclosing a beneficiation method for recovering ultra-low-grade scheelite from molybdenum tailings. For refractory scheelite with severe alteration and mudding, the method employs pre-slurry conditioning, enhanced pretreatment with reagents moved forward, followed by grinding and classification of the raw ore. By combining collectors, the refractory scheelite is synergistically recovered, ultimately obtaining a tungsten concentrate with a grade >26%, achieving a comprehensive actual recovery rate of 77%. This invention's process achieves full recovery and utilization of refractory scheelite resources in tailings, while reducing the operating costs of refractory ore recovery, creating considerable economic and social benefits.

This utility model relates to the field of grinding equipment technology and is a powder grinding machine, including a grinding box with a lower grinding disc inside. An upper grinding disc is fitted onto the lower grinding disc. The grinding box includes a box body and a box cover. A conical receiving hopper is connected to the bottom of the box body. A rotating ring is provided between the receiving hopper and the box body. A rack is fixed on the outer ring surface of the rotating ring, and the rack meshes with a gear. The gear is connected to a stepper motor. The lower grinding disc is fixedly connected to the rotating ring by multiple fixing rods. The upper grinding disc is connected to the box cover by fixing rods. A feeding channel is provided on the upper grinding disc. The box cover and the box body are connected by multiple vertical telescopic rods. The distance between the upper and lower grinding discs of this utility model can be flexibly adjusted, making it suitable for grinding materials of different particle sizes, improving the utilization rate of the equipment, and facilitating the cleaning of the upper and lower grinding discs; it also helps to improve product quality.