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A platform for research: civil engineering, architecture and urbanism
Methods for preparing active magnesium oxide and magnesium cement from lithium extraction magnesium slag by means of membrane separation method
The invention discloses methods for preparing active magnesium oxide and magnesium cement from lithium extraction magnesium slag by means of a membrane separation method. The method for preparing theactive magnesium oxide from the lithium extraction magnesium slag by means of the membrane separation method comprises the following step that: magnesium slag is calcined at 400-800 DEG C, so that a calcined product can be obtained, wherein the magnesium slag is a byproduct magnesium slag of a membrane separation lithium extraction process, and the magnesium slag also contains soluble chlorine salt impurities. A method for preparing magnesium cement from lithium extraction magnesium slag by means of a membrane separation method comprises the following steps of: calcining magnesium slag at thecalcining temperature of 400-800 DEG C to obtain a calcined product; preparing a magnesium chloride solution from magnesium chloride and water; and mixing the calcined product with the magnesium chloride solution to obtain the magnesium cement. According to the preparation method of the active magnesium oxide, provided by the invention, the lithium extraction magnesium slag containing more chloride ions is used as a raw material; the magnesium oxide product with higher activity is obtained by adjusting calcining conditions; and the magnesium oxide is further utilized to prepare the magnesium cement, so that the purpose of converting a large number of waste low-value byproducts into practical industrial raw materials is achieved.
本发明公开了一种膜分离法提锂镁渣制备活性氧化镁及镁水泥的方法，该膜分离法提锂镁渣制备活性氧化镁的方法，包括在400～800℃煅烧温度下煅烧镁渣，获得煅烧产物；其中，镁渣是膜分离提锂工艺的副产镁渣，镁渣中还包含可溶性氯盐杂质。膜分离法提锂镁渣制备镁水泥的方法，包括在400～800℃煅烧温度下煅烧镁渣，获得煅烧产物；将氯化镁和水配成氯化镁溶液；将煅烧产物与氯化镁溶液混合，得到镁水泥。本发明提供的活性氧化镁的制备方法以含有较多氯离子的提锂镁渣作为原料，经过调节煅烧条件获得了活性较高的氧化镁产物，并进一步利用该氧化镁制备镁水泥，实现了将大量废弃的低价值副产物转化成实用工业原料的目的。
Methods for preparing active magnesium oxide and magnesium cement from lithium extraction magnesium slag by means of membrane separation method
The invention discloses methods for preparing active magnesium oxide and magnesium cement from lithium extraction magnesium slag by means of a membrane separation method. The method for preparing theactive magnesium oxide from the lithium extraction magnesium slag by means of the membrane separation method comprises the following step that: magnesium slag is calcined at 400-800 DEG C, so that a calcined product can be obtained, wherein the magnesium slag is a byproduct magnesium slag of a membrane separation lithium extraction process, and the magnesium slag also contains soluble chlorine salt impurities. A method for preparing magnesium cement from lithium extraction magnesium slag by means of a membrane separation method comprises the following steps of: calcining magnesium slag at thecalcining temperature of 400-800 DEG C to obtain a calcined product; preparing a magnesium chloride solution from magnesium chloride and water; and mixing the calcined product with the magnesium chloride solution to obtain the magnesium cement. According to the preparation method of the active magnesium oxide, provided by the invention, the lithium extraction magnesium slag containing more chloride ions is used as a raw material; the magnesium oxide product with higher activity is obtained by adjusting calcining conditions; and the magnesium oxide is further utilized to prepare the magnesium cement, so that the purpose of converting a large number of waste low-value byproducts into practical industrial raw materials is achieved.
本发明公开了一种膜分离法提锂镁渣制备活性氧化镁及镁水泥的方法，该膜分离法提锂镁渣制备活性氧化镁的方法，包括在400～800℃煅烧温度下煅烧镁渣，获得煅烧产物；其中，镁渣是膜分离提锂工艺的副产镁渣，镁渣中还包含可溶性氯盐杂质。膜分离法提锂镁渣制备镁水泥的方法，包括在400～800℃煅烧温度下煅烧镁渣，获得煅烧产物；将氯化镁和水配成氯化镁溶液；将煅烧产物与氯化镁溶液混合，得到镁水泥。本发明提供的活性氧化镁的制备方法以含有较多氯离子的提锂镁渣作为原料，经过调节煅烧条件获得了活性较高的氧化镁产物，并进一步利用该氧化镁制备镁水泥，实现了将大量废弃的低价值副产物转化成实用工业原料的目的。
Methods for preparing active magnesium oxide and magnesium cement from lithium extraction magnesium slag by means of membrane separation method
一种膜分离法提锂镁渣制备活性氧化镁及镁水泥的方法
WEN JING (author) / XIAO XUEYING (author) / ZHENG WEIXIN (author) / LI YING (author) / DONG JINMEI (author) / CHANG CHENGGONG (author)
2020-09-01
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2020
| European Patent Office | 2020