Short-process preparation method of high-purity spherical graphite
A spherical graphite, short-process technology, applied in chemical instruments and methods, solid separation, inorganic chemistry, etc., can solve the problems of high fixed carbon content of raw materials, complicated process, high production cost, etc., and achieve low equipment cost, short process, The effect of high yield
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preparation example Construction
[0034] The short process preparation method of high-purity spherical graphite of the present invention, as Figure 1-5 Shown, the short process preparation method of high-purity spherical graphite comprises the following steps:
[0035] Step one, crushing, screening and grinding. Mineral raw materials are put into the jaw crusher 1 for coarse crushing, and the coarsely crushed ore particles enter the double-roll crusher 2 for fine crushing. The structure is simple and the manufacturing is easy, so the equipment cost is low. During the screening process, the ore particles with a particle size not greater than 2mm enter the grinding process, and the ore particles with a particle size greater than 2mm enter the roller crusher 2 for fine crushing until the particle size is not greater than 2mm. Since crushed materials mainly rely on extrusion or impact force, the utilization rate of crushing energy is higher than that of grinding energy, so the method of "more crushing and less g...
experiment example 1
[0047] The raw graphite ore is crushed and ground until 85% of the ore particles are no larger than 0.074mm, and the flotation process of one-stage roughing and two-stage beneficiation is adopted to prepare graphite coarse concentrate with a fixed carbon content of 80.32%; The impact pulverizer crushes the coarse graphite ore 6 times and shapes it 10 times to obtain products of two specifications, namely large balls (16-18 μm) and small balls (8-11 μm). The rate is 60.00%; put the obtained spherical graphite semi-finished product into a high-temperature furnace, set the temperature at 2800°C, and keep it for 3 hours, and finally obtain spherical graphite with a fixed carbon content of 99.96%.
experiment example 2
[0049] The raw graphite ore is crushed and ground until the ore particles of no more than 0.074mm account for 65%, and the flotation process of one-stage roughing and three-stage beneficiation is adopted to prepare graphite coarse concentrate with a fixed carbon content of 70.19%; The impact pulverizer crushes the coarse graphite ore 8 times and shapes it 10 times to obtain products of two specifications, namely large balls (16-18 μm) and small balls (8-11 μm). The rate is 48.64%; put the obtained spherical graphite semi-finished product into a high-temperature furnace, set the temperature at 3000°C, and keep it for 3 hours, and finally obtain spherical graphite with a fixed carbon content of 99.91%.
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