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传统的炒炭方法,多为直火炒炭,火候很难掌握,不容易得到合格品。为此,我们于1958年开始,试用砂子烫炭获得满意效果。砂子的选择及处理。取一般河砂,根据药物不同,分别过筛选细砂、中粗砂和粗砂子。用时筛去泥土,淘洗干净,晒干或炒干。如艾叶、大小蓟、侧柏叶、茜草等应用细砂为宜。因为这些药物饮片大小不一,以免烫后过筛时药物随筛而下。块大的药物如棕榈、生地、椿根皮等宜用中粗砂,中粗砂在锅内翻动时较细砂容易流动。而蒲黄粉宜用粗砂子,烫后过筛时,将蒲黄粉筛下,砂子留在筛上。
The traditional methods of frying charcoal are mostly direct fire and charcoal. It is difficult to grasp the heat and it is not easy to obtain qualified products. To this end, we started in 1958 and tried sand charcoal for satisfactory results. Sand selection and treatment. Take the general river sand, according to the different drugs, respectively, after screening fine sand, coarse sand and coarse sand. Sieve the soil with a sieve, wash it clean, dry it, or dry it. Such as the leaves, size, alfalfa leaves, alfalfa and other fine sand application is appropriate. Because these drugs are different in size, so as not to be screened when the drug is sifted. Large pieces of drugs such as palm, raw land, and root bark should be treated with medium-grit and medium-grit sands. The Puhuang powder should be made of coarse sand. After the hot sifting, the Puhuang powder is sieved and the sand is left on the sieve.