Rubber low temperature crushing is frozen crushing,30B Universal GrinderGenerally through liquid nitrogen, compressed air, air-conditioner and other cold sources and materials for heat exchange. The basic principle is that after freezing the rubber temperature to the glass temperature of rubber below, so that the rubber molecular chain can not move and brittle, so easy to crush. The specific process is to put the chopped adhesive into the pre-cooling box, the use of liquid nitrogen or other refrigerant, the rubber cooling to -70~-100℃, the glue at this temperature brittle, into the 30B universal grinder, in the refrigerant cooling under the action of grinding and crushing, the formation of fine rubber powder. The low power and crushing effect required by low temperature crushing method are good, and the fluidity of the rubber powder produced is better, and the particle size is smaller than that of the normal temperature crushing method. However, because the demand consumes a lot of cold energy for the freezing and crushing of rubber, the cost is high, which seriously affects the economy of rubber low temperature crushing skills.
Nowadays, there are two kinds of low temperature crushing methods, such as liquid nitrogen method and air expansion refrigeration. In addition, the low temperature crushing method using natural gas pipe network pressure cooling is also discussed in China. With the development of domestic liquefied natural gas (LNG) industry, LNG cold energy use has aroused people's great attention, in the next few years, China will build more than 10 LNG receiving stations in coastal areas, the annual import of tens of millions of tons of LNG, carrying a huge amount of cold energy. Now the LNG receiving station's cold energy use rate is less than 20%, so the domestic scholars put forward the LNG cold energy use skills and rubber low-temperature crushing skills combined with the method.
The following is a detailed description of the next 30B Universal grinder Daily Maintenance:
1, the production process, should always look at the bearing temperature, ultra-micro grinder when the temperature exceeds 50 ℃, downtime view, determination and troubleshooting due to.
2, the new operation, transmission belt cracking elongation, should adjust the appropriate belt tension, to ensure the service life of the belt.
3, often check the wearing parts, replacement timely, to ensure production quality and production capacity.
4, blade, support should always look at wear, if wear, reduce productivity, grain scale thickening to find wear replacement.
5, the classification of the host and mobile bearings is smooth grease, the second special smooth fat, 265 295.
6, bearing smooth fat change to 2000 hours period, oil filling space in the bearing chamber (measurement) of 1/2 or 3/4 (measurement) It is necessary not to fill in too much grease will cause the bearing overheating.
7, for 4,000 hours, plus ordinary calcium-based smooth fat fat spiral feeder.
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