Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention provides a preparation method of high-activity magnesium oxide. The preparation method comprises the following steps: S1, calcining dolomite to obtain calcined dolomite and kiln gas; S2, digesting and purifying kiln gas, namely digesting the calcined dolomite to obtain lime milk, and purifying sulfur dioxide and nitric oxide in the kiln ga; S3, introducing purified kiln gas into the lime milk, adjusting the PH of the lime milkto 7.4-7.3, and keeping the PH for 2.5-3.5 min; and then continuously introducing purified kiln gas into the lime milk, and adjusting the pH value of the lime milk to 7.2-7.1 to obtain a heavy magnesium liquid; S4, precisely filtering and purifying the heavy magnesium liquid in a pressurizing manner; S5, pyrolyzing and calcining and decomposing, namely pyrolyzing the heavy magnesium liquid to obtain basic magnesium carbonate, and calcining and decomposing the basic magnesium carbonate to obtain magnesium oxide; S6, drying and calcining: drying the magnesium oxide and then calcining; and S7, crushing and surface treatment: the magnesium oxide is crushed into powder by adopting an airflow crushing method, and the airflow contains a surfactant. The preparation method of the high-activity magnesium oxide is convenient to prepare the high-activity magnesium oxide.
本发明提供了一种高活性氧化镁的制备方法，包括步骤：S1、白云石经煅烧得到煅烧白云石和窑气；S2、消化及窑气净化，将煅烧白云石消化制得石灰乳；净化窑气中的二氧化硫和氮氧化物；S3、向石灰乳中通入净化后的窑气，调节石灰乳的PH至7.4～7.3并保持2.5～3.5min；继续向石灰乳中通入净化后的窑气，调节石灰乳的PH至7.2～7.1获得重镁液；S4、将重镁液以加压的方式精密过滤净化重镁液；S5、热解及煅烧分解，将重镁液热解得到碱式碳酸镁，将碱式碳酸镁煅烧分解得到氧化镁；S6、干燥及煅烧，将氧化镁干燥后进行煅烧；S7、粉碎及表面处理，采用气流粉碎法对氧化镁粉碎成粉末状，气流中带有表面活性剂。本发明所述的高活性氧化镁的制备方法，便于制得高活性氧化镁。
The invention provides a preparation method of high-activity magnesium oxide. The preparation method comprises the following steps: S1, calcining dolomite to obtain calcined dolomite and kiln gas; S2, digesting and purifying kiln gas, namely digesting the calcined dolomite to obtain lime milk, and purifying sulfur dioxide and nitric oxide in the kiln ga; S3, introducing purified kiln gas into the lime milk, adjusting the PH of the lime milkto 7.4-7.3, and keeping the PH for 2.5-3.5 min; and then continuously introducing purified kiln gas into the lime milk, and adjusting the pH value of the lime milk to 7.2-7.1 to obtain a heavy magnesium liquid; S4, precisely filtering and purifying the heavy magnesium liquid in a pressurizing manner; S5, pyrolyzing and calcining and decomposing, namely pyrolyzing the heavy magnesium liquid to obtain basic magnesium carbonate, and calcining and decomposing the basic magnesium carbonate to obtain magnesium oxide; S6, drying and calcining: drying the magnesium oxide and then calcining; and S7, crushing and surface treatment: the magnesium oxide is crushed into powder by adopting an airflow crushing method, and the airflow contains a surfactant. The preparation method of the high-activity magnesium oxide is convenient to prepare the high-activity magnesium oxide.
本发明提供了一种高活性氧化镁的制备方法，包括步骤：S1、白云石经煅烧得到煅烧白云石和窑气；S2、消化及窑气净化，将煅烧白云石消化制得石灰乳；净化窑气中的二氧化硫和氮氧化物；S3、向石灰乳中通入净化后的窑气，调节石灰乳的PH至7.4～7.3并保持2.5～3.5min；继续向石灰乳中通入净化后的窑气，调节石灰乳的PH至7.2～7.1获得重镁液；S4、将重镁液以加压的方式精密过滤净化重镁液；S5、热解及煅烧分解，将重镁液热解得到碱式碳酸镁，将碱式碳酸镁煅烧分解得到氧化镁；S6、干燥及煅烧，将氧化镁干燥后进行煅烧；S7、粉碎及表面处理，采用气流粉碎法对氧化镁粉碎成粉末状，气流中带有表面活性剂。本发明所述的高活性氧化镁的制备方法，便于制得高活性氧化镁。
Preparation method of high-activity magnesium oxide
高活性氧化镁的制备方法
HU YAWEI (Autor:in)
23.07.2021
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
/
B82Y
Bestimmter Gebrauch oder bestimmte Anwendung von Nanostrukturen
,
SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
/
C04B
Kalk
,
LIME
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