| 摘要 |
A briqutte is prepd. from coal of low quality. The briqutte is composed of 50% coal of low quality, 20% graphite, 28% coal of high quality and 2% combustion accelerant. The combustion accelerant is composed of 70% calcium oxide, 5% ferric oxide, 5% potassium nitrate, 5% sodium hydrocarbonate, 5% soot and 10% briquette cinder. This process cuts down cost of production.
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