4results about How to "Round particles" patented technology

The invention discloses a magnetism reducing method of high-magnetism lithium iron phosphate, and belongs to the technical field of preparation of lithium ion battery positive electrode materials. The process comprises the following steps of: uniformly mixing a high-magnetism lithium iron phosphate unqualified product generated in the conventional lithium iron phosphate industrial production process or electromagnetic slag generated by demagnetizing in the crushing process as a raw material with a powdery composite organic carbon source, putting the mixture into a bowl again, setting the highest temperature of a kiln to be 450-750 DEG C, heating again in a nitrogen atmosphere, and carrying out secondary sintering, so as to obtain the high-magnetism lithium iron phosphate product. The magnetic substance content of the material is remarkably reduced, so that the performance requirement of the lithium battery positive electrode material is met, the carbon layer can be repaired, the rate capacity and other performance can be improved, and the application prospect is good.

The invention discloses a high-stability fire extinguishing microcapsule and a preparation method thereof, and belongs to the technical field of fire fighting. Comprising a shell and a core material, the core material comprises a fire extinguishing agent and a nano modified material, and the shell is made of cation modified amino resin; the particle size of the nano modified material is 30-200nm, the mass ratio of the nano modified material to the fire extinguishing agent is 1: (5-20), and the mass ratio of the shell to the core material is 1: (1.5-3.0); the nano modified material is selected from hydrophobic modified aerogel or a hydrophobic modified molecular sieve. According to the invention, the special nano modified material is added into the core material, so that the perfluorohexanone is easier to emulsify, and meanwhile, the perfluorohexanone interacts with the shell formed by the cation modified amino resin, so that the empty coating condition is reduced, and the stability of the product is improved. The packaging rate of the product is greater than 95%, and the retention rate is greater than 99% after 30 days at 25 DEG C; and the retention rate is greater than 97.5% after 30 days under the condition of 60 DEG C.

The application discloses a granulation method of high-density spherical pesticide granules suitable for high-altitude spraying, characterized in that a pesticide raw material is uniformly mixed with a wetting agent, a dispersing agent, a disintegrating agent and a filler, the mixture is crushed by an air flow crusher to obtain a mother powder, the mother powder is sent into a high-speed granulator by a vacuum feeder, water is sprayed into the high-speed granulator at the same time, sugar-coated granulation is carried out, a boiling dryer is added to carry out drying, and the high-density spherical pesticide granules of the application are obtained. The granulation method of the high-density spherical pesticide granules is simple in process, low in equipment investment, and the obtained granules are round and uniform, and the method is convenient for popularization and promotion.

The utility model relates to the field of sand mixers, and discloses an anti-blocking device of a precoated sand mixer, which comprises a stirring barrel, a feeding barrel is arranged above the stirring barrel, a discharge port is arranged at the bottom of the feeding barrel, polishing mechanisms are symmetrically arranged on two sides of the feeding barrel, each polishing mechanism comprises a rotating barrel rotationally connected to one side of the feeding barrel, and the rotating barrel is provided with a rotating shaft. A filter screen is fixedly installed at the end, close to the feeding cylinder, of the rotating cylinder, spiral conveying threads are arranged on the inner wall of the rotating cylinder, a plurality of grinding balls are arranged in the rotating cylinder, and a spiral feeding mechanism is arranged at the end, away from the feeding cylinder, of the rotating cylinder. The precoated sand grinding device has the advantages and effects that materials are ground, so that material particles are round, the finished product quality of precoated sand is ensured, and meanwhile, the mixing efficiency of the materials is improved.