Transportation,and,storage,sil business, insurance Transportation and storage of silicon powder
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Silica particles are extremelyfine, compared with other powder materials, its specific surface area is up to20000-280000cm2/g, about 50 times greater than the fly ash, about 50 to 100 times greaterthan concrete. The production and applications of ultra-fine particles are the high-techin eighties. At present, there are already have Al2O3, zirconium oxide and othermagnetic ultrafine particles, silicon carbide, silicon oxide and other metal powder and alloys ultrafine,can be used for precision ceramics, high-performance powder metallurgy, conductivematerials, magnetic sensors, transducer and other new materials. Therefore, theultrafine characteristic of silicon powder has a very important role on improvingand enhancing the properties of the material.Condensed silicon powder in the gas, liquid, backto the process of the phase change by the surface tension, form of differentsizes round pellets, and the surface is more smooth, some of them may be two ormore spherical granules stick coagulation in together. Doped silica material, thistiny spherical body can play a smooth lubrication role, reduce the frictionbetween the particles, thereby improving the workability of the material, watercan be reduced, improve the material properties.Due to the small proportion of silica fume heap,big natural inclination, fluffy, easy to fly, shipping and unloading by thecontainer is not easy, and the packaging and transportation costs are expensive.Currently, the form of countries on silica processing, storage andtransportation is various, generally packaging with the form of raw powder,lumpy, beads in bulk, bags and others, silicon powder can also be made into the mud or mud paste with the right amount of water supply tothe users.Bulk loading is generally transporting with acovered or enclosed dump truck cement tanker. Bags loading are usually heavy 25kg, big bags loading can up to 300-500kg. Pocket generally use paper orplastic. At present, Tangshan, Shanghai,Taiyuan and other places in China, siliconpowder are mostly with double plastic bag, net weight 10-15kg.In order to improve the transport efficiency of siliconpowder, some manufacturers taken densification measures. Such as some factoriesin Canada, Sweden, the United States add water to siliconpowder slurry tank (water and silica fume are 50%). The mud made by Norway was containing 35% silicon powder, and directly deliveredto the concrete plant. In this way, the transport costs are lower, not dustwhile handling, good working environment; easy pumping, high degree ofmechanization.The method of silicon powder into a ball often used the traditional ball machine, Norway, Soviet Union, Japanand other countries have been reported. Use paper waste, silicon sodium, NaCl,alkali or alkaline earth metal hydroxide and other solution or water as abinder, the diameter of the made pellets is 5-25mm, aregenerally as silicon powder iron raw material returned to the furnace. Pelletsown strength some rely on the adhesion of adhesive, some need to calcination.In the late seventies, a number of suppliers usedefficient alkaline agents combined with silicon powder beads to produce concreteadmixtures. After 1982, beaded admixture has new development, Norway used different alkalineagents, efficient alkaline agent and silicon powder bonded into different performancebeads admixtures for cement, concrete and other mineral ingredients large (includinglow cement castable, etc.). This additive is extremely easy to use, can bedissolved in water after decomposition. At present, some countries have alsodeveloped this technology. Beaded silicon powders diameter is 0.5mm, its bulk density from theoriginal bulk silicon powder 0.2t/m3 increased to 0.6t/m3. It can make thepacking and shipping charges decreased by approximately 60%. Handlingefficiency increased, storage space and area reduced, also improve the workingconditions and environment.Source:http://www.mhcmp.com
Transportation,and,storage,sil