Method for producing coating particle magnesium
A granular magnesium and coating technology, which is applied in the field of desulfurization agent for the production of hot metal pre-desulfurization, can solve the problems of large power consumption, long time, high drying temperature, etc., and achieve the effect of high safety and simple production
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Embodiment 1
[0024] 200 kg of metal magnesium grains and 20 kg of fine powder above 500 mesh (aAl 2 o 3 Micropowder or silica fume) are poured into a sealed passivation pot with a rotating speed of 200-300r / min at high speed, stirred for 3-5 minutes, and after sieving, the finished coating granular magnesium with magnesium content ≥ 90% is obtained. The water content of the magnesium layer particles is determined by the powder for coating. The water content of the powder for coating itself is less than 5%, and the water content of the magnesium particles after coating is also less than 0.3%, without drying. The IC angle of the finished coated granular magnesium is 25-30°, and the bulk density is 0.89-0.94g / cm 3 , the flame retardant time is 15 seconds to 17 seconds, the finished coated granular magnesium is placed for 3 months without powder removal, the coating is intact, and it does not form lumps. When producing 24 mesh-100 mesh coated granular magnesium, there is no loss of active mag...
Embodiment 2
[0026] Pour 200 kg of metal magnesium granules and 16 kg of 320-mesh bauxite or light calcium carbonate powder into a sealed passivation pot rotating at a high speed of 200-300r / min, stir for 3-5 minutes, and sieve to obtain magnesium Finished coated granular magnesium with a content ≥ 92%, the moisture content of the finished coated granular magnesium is determined by the coating powder, the coating powder itself has a moisture content of less than 5%, and the moisture content of the coated magnesium particles is also less than 0.3% , without drying. The IC angle of the finished coated granular magnesium is 25-30°, and the bulk density is 0.89-0.94g / cm 3 , the flame retardant time is 15 seconds to 17 seconds, the finished coated granular magnesium is placed for 3 months without powder removal, the coating is intact, and it does not form lumps. When producing 24 mesh-100 mesh coated granular magnesium, there is no loss of active magnesium and no hydrogen. release, high securi...
Embodiment 3
[0028] Pour 200 kg of metal magnesium granules and 10 kg of 300-mesh bauxite powder or calcium aluminate powder into a sealed passivation pot rotating at a high speed of 200-300r / min, stir for 3-5 minutes, and sieve to obtain magnesium Finished coated granular magnesium with a content ≥ 95%, the moisture content of the finished coated granular magnesium is determined by the coating powder, the coating powder itself has a moisture content of less than 5%, and the moisture content of the coated magnesium particles is also less than 0.3% , without drying. The IC angle of the finished coated granular magnesium is 25-30°, and the bulk density is 0.89-0.94g / cm 3 , the flame retardant time is 15 seconds to 17 seconds, the finished coated granular magnesium is placed for 3 months without powder removal, the coating is intact, and it does not form lumps. When producing 24 mesh-100 mesh coated granular magnesium, there is no loss of active magnesium and no hydrogen. release, high secur...
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