Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing sulfuric acid and co-producing lime through microwave decomposition of waste gypsum
The invention discloses a method for preparing sulfuric acid and co-producing lime through microwave decomposition of waste gypsum, which comprises the following steps: mixing and homogenizing the waste gypsum and a silicon-aluminum material containing Fe2O3 to prepare a blank, feeding the blank into a microwave decomposition furnace to be calcined and decomposed to obtain high-activity CaO solid residues, and separating and absorbing generated SO3-containing flue gas to prepare sulfuric acid; the method has low requirements on waste gypsum raw materials, basically has no requirements on components in the waste gypsum raw materials, and does not need any pretreatment on the waste gypsum, so that the utilization range of the waste gypsum is expanded; the SO3 in the obtained furnace gas has high purity and high concentration, and can be easily separated and absorbed to prepare sulfuric acid; the residual solid slag is high-activity CaO and can be used for steelmaking slag formers, cement production or other metallurgy and silicate, food and chemical industries.
本发明公开了一种微波分解废石膏制备硫酸联产石灰的方法：将废石膏与含Fe2O3的硅铝质材料混合均化，制备成料坯送入微波分解炉中煅烧分解得到高活性CaO固体残渣，产生的含SO3烟气分离吸收制备成硫酸；本发明对废石膏原材料的要求低，对其中的成分基本没有要求，废石膏无需进行任何预处理，扩大了废石膏的利用范围；所得的炉气中SO3纯净度高、浓度高，极易被分离吸收制备成硫酸；残留固体渣为高活性CaO，可用于炼钢造渣剂、生产水泥或其它冶金与硅酸盐、食品及化工行业。
Method for preparing sulfuric acid and co-producing lime through microwave decomposition of waste gypsum
The invention discloses a method for preparing sulfuric acid and co-producing lime through microwave decomposition of waste gypsum, which comprises the following steps: mixing and homogenizing the waste gypsum and a silicon-aluminum material containing Fe2O3 to prepare a blank, feeding the blank into a microwave decomposition furnace to be calcined and decomposed to obtain high-activity CaO solid residues, and separating and absorbing generated SO3-containing flue gas to prepare sulfuric acid; the method has low requirements on waste gypsum raw materials, basically has no requirements on components in the waste gypsum raw materials, and does not need any pretreatment on the waste gypsum, so that the utilization range of the waste gypsum is expanded; the SO3 in the obtained furnace gas has high purity and high concentration, and can be easily separated and absorbed to prepare sulfuric acid; the residual solid slag is high-activity CaO and can be used for steelmaking slag formers, cement production or other metallurgy and silicate, food and chemical industries.
本发明公开了一种微波分解废石膏制备硫酸联产石灰的方法：将废石膏与含Fe2O3的硅铝质材料混合均化，制备成料坯送入微波分解炉中煅烧分解得到高活性CaO固体残渣，产生的含SO3烟气分离吸收制备成硫酸；本发明对废石膏原材料的要求低，对其中的成分基本没有要求，废石膏无需进行任何预处理，扩大了废石膏的利用范围；所得的炉气中SO3纯净度高、浓度高，极易被分离吸收制备成硫酸；残留固体渣为高活性CaO，可用于炼钢造渣剂、生产水泥或其它冶金与硅酸盐、食品及化工行业。
Method for preparing sulfuric acid and co-producing lime through microwave decomposition of waste gypsum
一种微波分解废石膏制备硫酸联产石灰的方法
SHEN WEIGUO (Autor:in) / ZHAO DEQIANG (Autor:in) / HUANG ZHIJUN (Autor:in) / HUANG SHENG (Autor:in) / WANG YANAN (Autor:in) / WU MIAOMIAO (Autor:in) / YU ZHEN (Autor:in) / ZHAO ZHICHENG (Autor:in)
13.02.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
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
/
C04B
Kalk
,
LIME
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