Additive of baking filler for carbon for aluminum
A technology of fillers and additives, applied in the field of carbon roasting, can solve the problems of high moisture and ash content in metallurgical coke, increase the production cost of carbon products, and affect the quality of aluminum carbon, so as to improve thermal conductivity, benefit environmental protection, improve The effect of production efficiency
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Example Embodiment
[0026] Example one
[0027] Add brown corundum / or white corundum, which accounts for 5% of the filler mass with a particle size of 0.5-10mm, into the existing roasted filler, and press the anode paste into a sample of Φ50*80mm, a total of four, the filler The samples and samples are put into a laboratory roasting furnace and roasted at 1000°C. The obtained carbon product has a smooth surface without adhesion and no oxidation cracking. The measured average physical and chemical indicators: room temperature resistivity is 53.15μΩ·m, bulk density is 1.56g / cm 3 , Compressive strength is 42mPa. The roasting time is shortened by 50 minutes compared with the case without corundum, and the burning loss rate of the filler is reduced by 10.5kg / t-C.
Example Embodiment
[0028] Embodiment two
[0029] Brown corundum / or white corundum, which accounts for 10% of the filler mass and has a particle size of 0.5-8 mm, is added to the existing calcined filler, and anodic firing is carried out under the conditions described in Example 1. The obtained anode sample has a smooth surface, no adhesion, no oxidation cracking, and the measured room temperature resistivity is 54.13μΩ·m, and the bulk density is 1.55g / cm 3 , Compressive strength is 40mPa. The firing time is shortened by 75 minutes compared with no corundum, and the burning loss rate of the filler is reduced by 12.6kg / t-C.
Example Embodiment
[0030] Embodiment three
[0031] Brown fused alumina and / or white fused alumina with a particle size of 2-10 mm accounting for 15% of the filler mass are added to the existing calcined filler, and anode firing is carried out under the conditions described in Example 1. The obtained anode sample has a smooth surface without adhesion and no oxidation cracking. The measured room temperature resistivity is 54.46μΩ·m and the bulk density is 1.57g / cm 3 , Compressive strength is 43mPa. The cooling time of the calcined product is shortened by 93 minutes compared with that without corundum, and the burning loss rate of the filler is reduced by 13.2kg / t-C.
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