30results about How to "Reasonable particle gradation" patented technology

The invention discloses an application method of a support mortar coagulant prepared from coal gangue. The preparation method of the coal gangue coagulant is as follows: firstly, the coal gangue is crushed and then dry-milled to obtain coal gangue powder with a particle size of 100-500 μm. Then, according to parts by weight, add 20-30 parts of coal gangue powder, 150-160 parts of water, 240-300 parts of grinding body, and 0.01-0.05 parts of surface passivator into the wet grinding equipment for grinding for 40-60 minutes to obtain a particle size below 0.3 μm gangue slurry. The application of the coagulant in the support mortar: 25-45 parts of ordinary Portland cement, 7-20 parts of water, 2-10 parts of coal gangue coagulant, 40-60 parts of quartz sand, 0.1-20 parts of high-efficiency water reducer 0.25 parts, expansion agent 3-5.5 parts, defoamer 0.03-0.2 parts, composite fiber 0.05-0.3 parts. The early strength of the prepared support mortar can reach 22.9-24.8MPa in 2 hours, and the later strength can reach more than 70MPa without shrinkage, and the fluidity is increased by 40-60%.

The invention relates to a solid material grinding method and a grinding machine. Solid materials enter a grinding body of a grinding room after being subjected to primary air classification, and are thrown onto a lining plate along the radial direction to be broken due to collision under the centrifugal effect of the grinding body in high-speed rotation; after rebounding from the lining plate, the broken materials oppositely collide newly-added materials to be broken; large-particle materials drop under the gravity effect and upwards enter a working cabin through a guide pipe after being subjected to high-speed hammering; the working bin has the functions of feeding and wind mixing elutriation; the materials subjected to wind mixing elutriation enter a classifier to be classified; finished material products achieving the granularity requirements are collected by a spiral collector and a bag-type dust remover and then are discharged from a finished product discharging device; and materials not achieving the granularity requirements are returned to the grinding room to be reground. The grinding machine has the beneficial effects that the grinding granularity is small, the grinding efficiency is high, the fine powder collecting effect is good, the equipment is compact in structure, the maintenance cost is low, powder bodies with the granularity in a range of 80-1,500 meshes can be produced, and the grinding machine has the advantages of high yield ad stable quality particularly when producing ultrafine powder with the granularity being greater than 800 meshes and materials with higher rigidity.