Bidirectional tosh grinding ultra-fine crashing objects and its method

Abstract

The present invention discloses a bidirectional-rotating ball-milling ultra-fine crushing device and the method thereof. The device is arranged with a jacket which is provided with cooling water; a closed material storing warehouse which closes the feeding / discharging material opening is arranged at the lower end of the barrel body; a vacuum pumping valve which is connected with the vacuum pumpingdevice is arranged at random feeding / discharging cover plate on the barrel body; and an inner lining is arranged at the inner surface of the barrel body. The bidirectional-rotating ball-milling ultra-fine crushing method is doing vacuum pumping to the inner side of the barrel body and actuating the transmission device to do ultra-fine crushing when the raw material above 80 mu is added into the barrel body, wherein the rotary speed of the barrel is 40 to 70 rotation / minute and the rotary speed of the inner rotating axle is 20 to 40 rotation / minute; the mass of the grinding ball gradation phibetween 5 to 10mm accounts for 35% to 55% of the total grinding ball mass, phi between 10 to 20mm accounts for 25% to 35% of the total grinding ball mass and the phi between 20 to 30mm accounts for 20% to 35% of the total grinding ball mass; and the mass ratio of the material ball is 1:4 to 1:15. The invention has the advantages of short producing time, low energy consumption and reduced producingcost, and the invention overcomes the fine particle problems of easy aggregation to block and fusing-aggregation, etc.

Description

a technical field [0001] The invention belongs to the superfine pulverization technology, in particular to a bidirectional rotating ball mill superfine pulverization device and method for hard, tough, inflammable and explosive special materials. Two background technology [0002] At present, the military and civilian fields urgently need to superfine many special materials that are hard, tough and flammable, such as Qinggang charcoal, sulfur, oxidizer, RDX, ignition agent, adamantine, red phosphorus, metal silicon, aluminum, magnesium, copper, iron , quartz stone, strontium titanate, polishing powder and Chinese herbal medicine Ganoderma lucidum, etc. for dry ultrafine (micron or nanometer in a dry state) or wet ultrafine. [0003] As we all know, it is very difficult to ultrafine the above materials in a dry state. The main technical problem is that these materials are hard and tough. At present, the existing ultrafine technology and equipment in China cannot provide strong...

AI Technical Summary

Problems solved by technology

[0003] As we all know, it is very difficult to ultrafine the above materials in a dry state. The main technical problem is that these materials are hard and tough. At present, the existing ultrafine technology and equipment in China cannot provide strong impact force and strong shear force at the same time. , strong friction and strong extrusion force, so it cannot be ultrafine; in addition, when these materials are ultrafinely pulverized in a dry state, the fine particles are very easy to stick to each other and agglomerate and grow again (called reverse crushing), and most of these materials when their particles reach the micron, submicron or nanometer level are very easy to oxidize with oxygen in the air, spontaneously ignite or generate a lot of static electricity and heat during the ultra-fine process, so in the ultra-fine It is very easy to burn or explode during the ultra-fine process, and the safety issues in the ultra-fine process cannot be guaranteed

[0007] The improvement of the above-mentioned process technology and equipment has not broken through the single crushing force field of the ball mill, so it is still impossible to ultrafine many special materials that are hard, tough and flammable. According to the crushing theory (crushing theory), for hard materials It needs to use strong impact force and extrusion force to break it. For tough materials, it usually needs strong shear force and friction force to break it. The above-mentioned technologies and equipment cannot provide strong impact force, strong shear force and strong friction force at the same time. Force and strong extrusion force, and without safety measures, it is difficult to meet the ultrafine of hard and tough materials. Therefore, Liu Hongying and others invented the "bidirectional rotating ultrafine pulverization ball mill" (ZL200420079766.5) to solve the problem of relying on A rotating cylinder drives the loaded materials and grinding media to impact and grind each other to make the material crushed. The ball mill crushing machine has a low technical problem of crushing efficiency. However, there are also pollution, noise, and The heating of the cylinder can cause danger and other problems.

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