Oyster shells produce active calcium powder

December 14, 2018

The use of shells made of natural oysters containing 70% calcium (known in the south as èš, )) can be used to produce a white active calcium powder that is easily absorbed by the body. It can be used as a food additive for children and calcium deficiency patients. The following describes the process of producing active calcium powder with oysters. 1. Heat treatment of oyster shells: A tubular combustion furnace with an inside diameter of 80 cm, an outside diameter of 100 cm and a height of 150 cm and a 1520 cm cast iron hearth is mounted on the bottom of the oyster shells. In the hearth, coke is used as fuel to heat the shells of the oysters, and the outside is blown with a 100 mm diameter hair dryer. Put charcoal into the fireproof cage of oyster shells on coke. During the heating period, the temperature of the furnace should be maintained at 1500-2000Â°C, and the furnace cover should be covered with the air blow for 1-3 hours, and then the air in the furnace should be stopped to cool the shell naturally. In addition to using coke as a fuel, it can also be heated by electric furnaces, kerosene furnaces, and the like. 2. Crushing and purifying: The cooled shells can be taken out from the furnace and pulverized with a pulverizer to make it a 100 mesh fine powder. Put 20 kg of this powder into a stainless steel cylinder with a diameter of 100 cm and a depth of 50 cm. Add a suitable amount of water, stir evenly, cover it flat, press the lid with a suitable weight, and finally heat the stainless steel cylinder to 20-30 Â°C. , so that the impurities leaked from the gap in the lid, leaving the white active calcium powder. This calcium powder is not only high in calcium, but also easily soluble in water, easily absorbed by the stomach, and has no irritation to the intestine. It is a good food additive for increasing body calcium. This production method and the required equipment are relatively simple, but it can produce high quality active calcium powder.

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