废弃的蛋壳可用来制成蛋壳粉，它含有丰富的无机盐类和少量的有机物质，可混入饲料中喂家畜和家禽，以补充钙的不足，促进畜禽生长发育。据测定，蛋壳粉中含有碳酸钙94.54%，蛋白质1.15%，碳酸镁和磷酸钙4.36%。蛋壳粉还可作肥料以及加工去污粉等，认真研究蛋壳粉的生产利用，变废为宝，是有一定的经济价值的。
你自己可以做蛋壳粉，收集碎的蛋壳，晒干，然后碾碎。
Eggshell powder can be made yourself, by saving the raw shells, drying and then running them through a coffee grinder.
鸡蛋壳经高温煅烧成蛋壳粉，再与酸性果汁进行中和反应，最后烘干得到固体果汁钙产品。
The egg shell is calcined into powder, reacted with acidic juice, the mixture was dried into solid products.
以蛋壳为原料，磷酸钙为反应剂，采用煅烧合成工艺，可简单快速地制备羟基磷灰石（HA）粉体材料。
The hydroxyapatite (HA) powders were simply and rapidly prepared from the eggshells and calcium phosphate by the sintering synthesis process.
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