Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing building gypsum by recycling nitration waste sulfuric acid
The invention discloses a method for preparing building gypsum by recycling nitration waste sulfuric acid, and relates to the technical field of comprehensive utilization of industrial waste acid. The method specifically comprises the following steps: diluting waste acid with water, stirring, adding mechanically-applied activated carbon, stirring, standing, and filtering to obtain pretreated waste acid; adding activated carbon into the pretreated waste acid, heating, stirring and filtering, adding activated carbon, heating, stirring and filtering to obtain faint yellow clear liquid, applying filtrate to next reaction, and applying waste activated carbon; adding waste calcium carbonate into a reaction bottle, adding water, uniformly stirring, dropwise adding the decolorized waste acid, stirring and filtering to obtain a calcium sulfate wet product, and calcining to obtain calcium sulfate hemihydrate. The method has the advantages that the waste acid can be effectively recycled to generate building gypsum, so that the treatment cost of the waste acid solution is counteracted, the environmental pollution is reduced, and economic benefits can be obtained; the residual organic matters in the waste acid can be effectively removed, the activated carbon is recycled, the operation steps are simple, and the production cost is reduced.
本发明公开了一种硝化废硫酸再利用制备建筑石膏的方法，它涉及工业废酸综合利用技术领域。具体包括以下步骤：将废酸加水稀释，搅拌，加入套用活性炭，搅拌静置后过滤，得到预处理废酸；将预处理废酸加入活性炭，升温搅拌后过滤，再加入活性炭升温搅拌过滤，得到淡黄色澄清液体，滤液用于下一步反应，废活性炭套用；将废碳酸钙加入反应瓶中，加水搅拌均匀，滴加脱色后的废酸，搅拌过滤得到硫酸钙湿品，煅烧得到半水硫酸钙。本发明的优点在于：废酸可得到有效循环使用，生成建筑石膏，抵消废酸液处置成本，减少环境污染，还可取得经济效益；废酸中的残余有机物可得到有效去除，活性炭循环套用，操作步骤简单，降低生产成本。
Method for preparing building gypsum by recycling nitration waste sulfuric acid
The invention discloses a method for preparing building gypsum by recycling nitration waste sulfuric acid, and relates to the technical field of comprehensive utilization of industrial waste acid. The method specifically comprises the following steps: diluting waste acid with water, stirring, adding mechanically-applied activated carbon, stirring, standing, and filtering to obtain pretreated waste acid; adding activated carbon into the pretreated waste acid, heating, stirring and filtering, adding activated carbon, heating, stirring and filtering to obtain faint yellow clear liquid, applying filtrate to next reaction, and applying waste activated carbon; adding waste calcium carbonate into a reaction bottle, adding water, uniformly stirring, dropwise adding the decolorized waste acid, stirring and filtering to obtain a calcium sulfate wet product, and calcining to obtain calcium sulfate hemihydrate. The method has the advantages that the waste acid can be effectively recycled to generate building gypsum, so that the treatment cost of the waste acid solution is counteracted, the environmental pollution is reduced, and economic benefits can be obtained; the residual organic matters in the waste acid can be effectively removed, the activated carbon is recycled, the operation steps are simple, and the production cost is reduced.
本发明公开了一种硝化废硫酸再利用制备建筑石膏的方法，它涉及工业废酸综合利用技术领域。具体包括以下步骤：将废酸加水稀释，搅拌，加入套用活性炭，搅拌静置后过滤，得到预处理废酸；将预处理废酸加入活性炭，升温搅拌后过滤，再加入活性炭升温搅拌过滤，得到淡黄色澄清液体，滤液用于下一步反应，废活性炭套用；将废碳酸钙加入反应瓶中，加水搅拌均匀，滴加脱色后的废酸，搅拌过滤得到硫酸钙湿品，煅烧得到半水硫酸钙。本发明的优点在于：废酸可得到有效循环使用，生成建筑石膏，抵消废酸液处置成本，减少环境污染，还可取得经济效益；废酸中的残余有机物可得到有效去除，活性炭循环套用，操作步骤简单，降低生产成本。
Method for preparing building gypsum by recycling nitration waste sulfuric acid
一种硝化废硫酸再利用制备建筑石膏的方法
ZHAO HAIHUA (Autor:in) / LI BIN (Autor:in) / ZHANG ZHIHONG (Autor:in) / ZHANG PENG (Autor:in)
11.03.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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