Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention belongs to the technical field of nonmetallic mineral processing, and particularly relates to a method for jointly preparing high-purity magnesium oxide and refined ammonium sulfate by using low-grade magnesite; the method is characterized by comprising the specific steps: 1) calcining the low-grade magnesite to prepare light calcined powder; 2) performing impurity removal treatment;3) mixing the light calcined powder with industrial pure water, and adding concentrated sulfuric acid for reaction; 4) adding a sodium hydroxide solution, settling and separating impurities such as solid-phase substances to obtain a refined magnesium sulfate solution; 5) mixing ammonia water with the magnesium sulfate solution to generate magnesium hydroxide crystal precipitate and an ammonium sulfate solution; 6) washing, drying and calcining the magnesium hydroxide crystal to obtain a 99.6%-99.87% high-purity magnesium oxide finished product; and 7) filtering, neutralizing, evaporating, crystallizing and drying the ammonium sulfate solution to obtain a refined ammonium sulfate byproduct. The method has the beneficial effects that the resource utilization rate and the product purity areimproved, the production cost is reduced, the environment-friendly and clean production is realized, and the like.
本发明属于非金属矿物加工技术领域，特别涉及一种用低品位菱镁矿联合制备高纯氧化镁和精制硫酸铵的方法，其特征在于，具体步骤包括：1）将低品位菱镁矿经煅烧制备轻烧粉；2）采用去杂处理；3）轻烧粉和工业纯水混合，加浓硫酸反应；4）加氢氧化钠溶液，沉降并分离固相物等杂质，得精制硫酸镁溶液；5）将氨水和硫酸镁溶液混合，生成氢氧化镁晶体沉淀和硫酸铵溶液；6）将氢氧化镁晶体洗涤、烘干、煅烧，得99.6%‑99.87%的高纯氧化镁成品；7）硫酸铵溶液经过滤、中和、蒸发、结晶和干燥后，得精制硫酸铵副产品。本发明具有提高资源利用率和产品纯度、降低生产成本、实现环保清洁生产等有益效果。
The invention belongs to the technical field of nonmetallic mineral processing, and particularly relates to a method for jointly preparing high-purity magnesium oxide and refined ammonium sulfate by using low-grade magnesite; the method is characterized by comprising the specific steps: 1) calcining the low-grade magnesite to prepare light calcined powder; 2) performing impurity removal treatment;3) mixing the light calcined powder with industrial pure water, and adding concentrated sulfuric acid for reaction; 4) adding a sodium hydroxide solution, settling and separating impurities such as solid-phase substances to obtain a refined magnesium sulfate solution; 5) mixing ammonia water with the magnesium sulfate solution to generate magnesium hydroxide crystal precipitate and an ammonium sulfate solution; 6) washing, drying and calcining the magnesium hydroxide crystal to obtain a 99.6%-99.87% high-purity magnesium oxide finished product; and 7) filtering, neutralizing, evaporating, crystallizing and drying the ammonium sulfate solution to obtain a refined ammonium sulfate byproduct. The method has the beneficial effects that the resource utilization rate and the product purity areimproved, the production cost is reduced, the environment-friendly and clean production is realized, and the like.
本发明属于非金属矿物加工技术领域，特别涉及一种用低品位菱镁矿联合制备高纯氧化镁和精制硫酸铵的方法，其特征在于，具体步骤包括：1）将低品位菱镁矿经煅烧制备轻烧粉；2）采用去杂处理；3）轻烧粉和工业纯水混合，加浓硫酸反应；4）加氢氧化钠溶液，沉降并分离固相物等杂质，得精制硫酸镁溶液；5）将氨水和硫酸镁溶液混合，生成氢氧化镁晶体沉淀和硫酸铵溶液；6）将氢氧化镁晶体洗涤、烘干、煅烧，得99.6%‑99.87%的高纯氧化镁成品；7）硫酸铵溶液经过滤、中和、蒸发、结晶和干燥后，得精制硫酸铵副产品。本发明具有提高资源利用率和产品纯度、降低生产成本、实现环保清洁生产等有益效果。
Method for jointly preparing high-purity magnesium oxide and refined ammonium sulfate from low-grade magnesite
用低品位菱镁矿联合制备高纯氧化镁和精制硫酸铵的方法
LIU FENG (Autor:in)
05.02.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
,
Verbindungen der Metalle Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium oder der Seltenen Erden
/
C01C
Ammoniak
,
AMMONIA
/
C04B
Kalk
,
LIME
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