有了合理的炉体结构，再配以自动控制系统，合理的焙烧周期等条件，就能降低能耗。
An reasonable furnace structure completed with an automatic control system and rational baking period and other conditions can lead to a result of energy saving or reduction.
直接法的优点在于产品不必经过焙烧， 生产周期短，成本低等。
The direct synthesis method has the merits of requiring no calcining shorter producing period and lower costs.
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