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Preparation method of electrolytic manganese residue and phosphogypsum composite cementing material
The invention discloses a preparation method of an electrolytic manganese residue and phosphogypsum composite cementing material, which comprises the following steps of: drying electrolytic manganese residue and phosphogypsum at low temperature, and forming ammonium dihydrogen phosphate crystals by ammonia gas volatilized in the heating process and active phosphorus in the phosphogypsum; and mixing the dried electrolytic manganese residues, the dried phosphogypsum and dolomite sand, performing high-temperature calcination, removing most crystal water from the dehydrate phosphogypsum to obtain hemihydrate gypsum, converting soluble phosphorus and fluorine into insoluble substances, and calcining the dolomite into a mixture of calcium oxide and magnesium oxide, so as to form the composite cementing material with the electrolytic manganese residues and the phosphogypsum as main materials and the dolomite as an auxiliary material. The raw materials are rich in source, resource recycling can be achieved, and the problems that in the current general electrolytic manganese residue and phosphogypsum building material utilization process, the treatment cost is high, the adding amount is small, the product quality is poor, and practicability is poor can be solved; and the problem of secondary environmental pollution caused by the utilization of the electrolytic manganese residues and the phosphogypsum can also be eliminated.
本发明公开了一种电解锰渣磷石膏复合胶凝材料的制备方法，包括如下步骤：在低温条件下对电解锰渣和磷石膏进行烘干处理，加热过程中挥发的氨气与磷石膏中活性磷形成磷酸二氢铵结晶体；将烘干的电解锰渣和磷石膏与白云石砂混合进行高温煅烧，将二水磷石膏脱掉大部分结晶水成为半水石膏，同时将可溶磷、氟转化为难溶物，以及将白云石锻烧成为氧化钙、氧化镁的混合物，形成以电解锰渣和磷石膏为主、白云石为辅的复合胶凝材料。本发明原料来源丰富，可实现资源循环利用，能解决目前普遍电解锰渣和磷石膏建材化利用过程中处理成本较高、添加量较少、产品质量不佳、实用性较差等问题；还能消除电解锰渣和磷石膏利用带来的二次环境污染问题。
Preparation method of electrolytic manganese residue and phosphogypsum composite cementing material
The invention discloses a preparation method of an electrolytic manganese residue and phosphogypsum composite cementing material, which comprises the following steps of: drying electrolytic manganese residue and phosphogypsum at low temperature, and forming ammonium dihydrogen phosphate crystals by ammonia gas volatilized in the heating process and active phosphorus in the phosphogypsum; and mixing the dried electrolytic manganese residues, the dried phosphogypsum and dolomite sand, performing high-temperature calcination, removing most crystal water from the dehydrate phosphogypsum to obtain hemihydrate gypsum, converting soluble phosphorus and fluorine into insoluble substances, and calcining the dolomite into a mixture of calcium oxide and magnesium oxide, so as to form the composite cementing material with the electrolytic manganese residues and the phosphogypsum as main materials and the dolomite as an auxiliary material. The raw materials are rich in source, resource recycling can be achieved, and the problems that in the current general electrolytic manganese residue and phosphogypsum building material utilization process, the treatment cost is high, the adding amount is small, the product quality is poor, and practicability is poor can be solved; and the problem of secondary environmental pollution caused by the utilization of the electrolytic manganese residues and the phosphogypsum can also be eliminated.
本发明公开了一种电解锰渣磷石膏复合胶凝材料的制备方法，包括如下步骤：在低温条件下对电解锰渣和磷石膏进行烘干处理，加热过程中挥发的氨气与磷石膏中活性磷形成磷酸二氢铵结晶体；将烘干的电解锰渣和磷石膏与白云石砂混合进行高温煅烧，将二水磷石膏脱掉大部分结晶水成为半水石膏，同时将可溶磷、氟转化为难溶物，以及将白云石锻烧成为氧化钙、氧化镁的混合物，形成以电解锰渣和磷石膏为主、白云石为辅的复合胶凝材料。本发明原料来源丰富，可实现资源循环利用，能解决目前普遍电解锰渣和磷石膏建材化利用过程中处理成本较高、添加量较少、产品质量不佳、实用性较差等问题；还能消除电解锰渣和磷石膏利用带来的二次环境污染问题。
Preparation method of electrolytic manganese residue and phosphogypsum composite cementing material
一种电解锰渣磷石膏复合胶凝材料的制备方法
CHEN ZUYONG (author) / LIU FANG (author) / LIU YUANSHENG (author) / ZHU JIAN (author) / BU TONGDA (author) / YANG LI (author)
2021-08-13
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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