A method of preparing calcium carbide by co-molding of carbide slag and coke powder
A technology of carbide slag powder and carbide slag, applied in the direction of carbide, calcium carbide, etc., can solve the problems of easy hydration of CaO, high cost of raw materials, small reaction area, etc. The effect of reaction temperature
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[0024] Example 1
[0025] Carbide slag (Ca(OH) 2 Purity greater than 95%) crushing, sieving, sieving coke powder with a sieve, so that the particle size of the two raw materials is 0.2mm.
[0026] Add 1.5% acetic acid to the calcium carbide slag powder with the above particle size, stir well, then mix with coke powder according to the mass ratio of 4:1, and then add 20% modified starch and 6% water, stir well.
[0027]Put the mixed material into an embedding machine for cold press molding (the molding pressure is 45MPa), to obtain 30g of cylindrical green balls, and the cold strength of the green balls is greater than 10MPa. Put the green balls in an oxygen-filled drying oven, heat them up to 100°C at a rate of 20°C / min, and dry them at a constant temperature for 120 minutes.
[0028] Put the dried green balls in a muffle furnace and heat up to 550°C for 30 minutes at a constant temperature, then heat up to 950°C for 30 minutes at a constant temperature, and the calcination...
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[0031] Example 2
[0032] Crush and sieve the slaked lime, and sieve the coke powder with a sieve, so that the particle size of the two raw materials is 0.2mm. Add 1.5% Ca(H 2 PO 4 ) 2 , fully stirred, and then batched with coke powder according to the mass ratio of 7:3, then added modified starch and 6% water respectively accounting for 20% by weight of the mixture, and fully stirred evenly.
[0033] The mixed material was cold-pressed in an embedding machine (the molding pressure was 45 MPa), and 30 g of cylindrical green balls were obtained. Put the green balls in an oxygen-filled drying oven, heat them up to 120°C at a rate of 20°C / min, and dry them at a constant temperature for 120 minutes.
[0034] Put the dried green balls in a muffle furnace and heat up to 600°C for 30 minutes at a constant temperature, then heat up to 1000°C for 30 minutes at a constant temperature, and the calcination atmosphere is N 2 or CO 2 or Ar.
[0035] The calcined pellets (cooked pelle...
Example Embodiment
[0037] Example 3
[0038] Carbide slag (Ca(OH) 2 Purity greater than 95%) crushing, sieving, sieving coke powder with a sieve, so that the particle size of the two raw materials is 0.15mm.
[0039] Add 1.5% acetic acid to the calcium carbide slag powder of the above particle size, stir well, and then mix with coke powder according to the mass ratio of 7:3, and then add ethylene coal tar, coal tar and coal tar pitch accounting for 10% by weight of the mixed material And account for the water of 5% by weight of the mixed material, fully stir evenly.
[0040] The mixed material was cold-pressed in an embedding machine (the molding pressure was 45 MPa), and 30 g of cylindrical green balls were obtained. Put the green balls in an oxygen-filled drying oven, heat them up to 100°C at a rate of 20°C / min, and dry them at a constant temperature for 120 minutes.
[0041] Put the dried green balls in a muffle furnace and heat up to 550°C for 30 minutes at a constant temperature, then he...
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