What's key in having volcanic eruptions affect the weather is both the duration of the eruption, and how high the ash gets blasted into the stratosphere, according to Hufford.
The article introduces raw materials of fly ash brick, production process and control key points.
介绍粉煤灰制砖的原材料、工艺过程及生产控制要点。
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Based on the analysis of the main factors influencing on the ash index, provides that reasonable mining is the key to lift the economic benefit to coal enterprise.