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Method for preparing calcium oxide from limestone
The invention discloses a method for preparing calcium oxide by utilizing limestone, which comprises the following steps: S1, selecting small-particle limestone, mixing with calcium nitrate, heating and calcining in a muffle furnace, and heating and decomposing the calcium nitrate for preparing new calcium nitrate; s2, raising the temperature to 800 DEG C again, continuously calcining until the small-particle limestone is completely converted into calcium oxide, stopping calcining, and taking out the product calcium oxide when the temperature is reduced to room temperature; the steps S3, S4 and S5 are carried out after the step S2 and are used for preparing calcium nitrate; s3, calcining and decomposing the calcium nitrate in the step S1 to obtain calcium oxide and nitric oxide gas, and absorbing the escaped nitric oxide gas with water to prepare a nitric acid solution; s4, soaking small-particle limestone with the nitric acid solution in the step S3 to obtain calcium nitrate; and S5, mixing the calcium nitrate in the step S4 with the small-particle limestone for a new round of preparation of calcium oxide.
本发明公开了一种利用石灰石制备氧化钙方法，包括以下步骤：S1、选择小颗粒石灰石与硝酸钙混合后，先在马弗炉中进行升温煅烧，硝酸钙被加热分解用于制取新的硝酸钙；S2、再次升温至800℃，并继续煅烧，直至小颗粒石灰石全部转化成氧化钙，停止煅烧，待温度降至室温，取出产品氧化钙；在步骤S2之后还有步骤S3、S4和S5，用于制备硝酸钙；S3、所述步骤S1中硝酸钙煅烧分解获得氧化钙和氧化氮气体，并用水吸收逸出的氧化氮气体制得硝酸溶液；S4、用所述步骤S3中的硝酸溶液浸泡小颗粒石灰石得到硝酸钙，S5、所述步骤S4中硝酸钙与小颗粒石灰石混合进行新一轮的氧化钙制备。
Method for preparing calcium oxide from limestone
The invention discloses a method for preparing calcium oxide by utilizing limestone, which comprises the following steps: S1, selecting small-particle limestone, mixing with calcium nitrate, heating and calcining in a muffle furnace, and heating and decomposing the calcium nitrate for preparing new calcium nitrate; s2, raising the temperature to 800 DEG C again, continuously calcining until the small-particle limestone is completely converted into calcium oxide, stopping calcining, and taking out the product calcium oxide when the temperature is reduced to room temperature; the steps S3, S4 and S5 are carried out after the step S2 and are used for preparing calcium nitrate; s3, calcining and decomposing the calcium nitrate in the step S1 to obtain calcium oxide and nitric oxide gas, and absorbing the escaped nitric oxide gas with water to prepare a nitric acid solution; s4, soaking small-particle limestone with the nitric acid solution in the step S3 to obtain calcium nitrate; and S5, mixing the calcium nitrate in the step S4 with the small-particle limestone for a new round of preparation of calcium oxide.
本发明公开了一种利用石灰石制备氧化钙方法，包括以下步骤：S1、选择小颗粒石灰石与硝酸钙混合后，先在马弗炉中进行升温煅烧，硝酸钙被加热分解用于制取新的硝酸钙；S2、再次升温至800℃，并继续煅烧，直至小颗粒石灰石全部转化成氧化钙，停止煅烧，待温度降至室温，取出产品氧化钙；在步骤S2之后还有步骤S3、S4和S5，用于制备硝酸钙；S3、所述步骤S1中硝酸钙煅烧分解获得氧化钙和氧化氮气体，并用水吸收逸出的氧化氮气体制得硝酸溶液；S4、用所述步骤S3中的硝酸溶液浸泡小颗粒石灰石得到硝酸钙，S5、所述步骤S4中硝酸钙与小颗粒石灰石混合进行新一轮的氧化钙制备。
Method for preparing calcium oxide from limestone
一种利用石灰石制备氧化钙方法
NING WENSHENG (author) / YU CHANG (author) / YU BINGQUAN (author) / HUO CHAO (author) / YANG XIAZHEN (author) / JIANG QI (author) / WANG QI (author)
2024-04-26
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
C01B
NON-METALLIC ELEMENTS
,
Nichtmetallische Elemente
/
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
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