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| Preparation of Magnesium Hydroxide from Bischofite and High-calcium Magnesite |
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Received:August 30, 2021
Revised:September 16, 2021
Accepted:September 17, 2021
Published Online:December 17, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2022.01.016 |
| KeyWord:bischofite; high-calcium magnesite; magnesium hydroxide; calcium removal; hydrometallurgy |
| Author | Institution |
| GUO Li-li |
辽宁省化学助剂合成与分离重点实验室,营口理工学院 |
| LI Zhen |
辽宁省化学助剂合成与分离重点实验室，营口理工学院 |
| WANG Xiao-min |
辽宁省化学助剂合成与分离重点实验室，营口理工学院 |
| WANG Yao-wu |
东北大学 |
| WANG You-wei |
营口理工学院 |
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| Abstract: |
| As a new green and environmental protection material, magnesium hydroxide is widely used. How to prepare high-quality magnesium hydroxide at low cost has attracted wide attention. Bischofite and high-calcium magnesite were used as raw materials to prepare magnesium hydroxide by hydrometallurgical process. Influences of reaction time, reaction temperature, bischofite concentration, and particle size of calcined material on purity of magnesium hydroxide were discussed. The results show that magnesium hydroxide precipitate with purity of 94.89% and main phase of Mg (OH)2 and CaO is obtained under the conditions including thermostatic waterbath temperature of 80 ℃, reaction time of 6 h, bischofite concentration of 5%, and particle size of calcined magnesite of —45 μm. |
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