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Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns. | |
A. | 1800 [Wrong Answer] |
B. | 2200 [Wrong Answer] |
C. | 2400 [Wrong Answer] |
D. | 2700 [Correct Answer] |