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A platform for research: civil engineering, architecture and urbanism
Method for modifying ardealite with basic oxide
The invention discloses a method for modifying ardealite with basic oxide, and relates to the technical field of building materials. A method for modifying ardealite with alkaline oxide comprises the following steps: S1, modifying the alkaline oxide: directly injecting fresh ardealite generated in a phosphoric acid reaction process into a reactor, adding the alkaline oxide into the reactor, mixing, and reacting to generate modified fresh ardealite; the alkaline oxide comprises Na2O and K2O; s2, a low-temperature roasting step: feeding the modified fresh phosphogypsum into a roasting furnace, introducing water vapor, reducing the content of sulfuric acid in the modified fresh phosphogypsum and the content of crystal water in calcium sulfate dihydrate, and finally obtaining the modified phosphogypsum cementing material. The method can realize direct utilization without additional matching of other slag materials, improves the gelling activity, contains few harmful impurities such as water-soluble phosphorus and fluorine, and does not need long-time aging.
一种碱性氧化物改性磷石膏的方法，涉及建材技术领域。一种碱性氧化物改性磷石膏的方法，包括：S1：碱性氧化物改性步骤：将磷酸反应过程中产生的新鲜磷石膏直接注入反应器中，向其中加入碱性氧化物并混合，反应生成改性新鲜磷石膏；所述碱性氧化物包括Na2O、K2O；S2：低温焙烧步骤：将所述改性新鲜磷石膏送入焙烧炉，通入水蒸气，减少所述改性新鲜磷石膏中的硫酸含量及二水硫酸钙中结晶水含量，最终获得改性磷石膏胶凝材料。该方法能够实现无需额外其他渣料配合，直接利用，提高胶凝活性，含有水溶磷以及氟等有害杂质少，且不需要长时间陈化。
Method for modifying ardealite with basic oxide
The invention discloses a method for modifying ardealite with basic oxide, and relates to the technical field of building materials. A method for modifying ardealite with alkaline oxide comprises the following steps: S1, modifying the alkaline oxide: directly injecting fresh ardealite generated in a phosphoric acid reaction process into a reactor, adding the alkaline oxide into the reactor, mixing, and reacting to generate modified fresh ardealite; the alkaline oxide comprises Na2O and K2O; s2, a low-temperature roasting step: feeding the modified fresh phosphogypsum into a roasting furnace, introducing water vapor, reducing the content of sulfuric acid in the modified fresh phosphogypsum and the content of crystal water in calcium sulfate dihydrate, and finally obtaining the modified phosphogypsum cementing material. The method can realize direct utilization without additional matching of other slag materials, improves the gelling activity, contains few harmful impurities such as water-soluble phosphorus and fluorine, and does not need long-time aging.
一种碱性氧化物改性磷石膏的方法，涉及建材技术领域。一种碱性氧化物改性磷石膏的方法，包括：S1：碱性氧化物改性步骤：将磷酸反应过程中产生的新鲜磷石膏直接注入反应器中，向其中加入碱性氧化物并混合，反应生成改性新鲜磷石膏；所述碱性氧化物包括Na2O、K2O；S2：低温焙烧步骤：将所述改性新鲜磷石膏送入焙烧炉，通入水蒸气，减少所述改性新鲜磷石膏中的硫酸含量及二水硫酸钙中结晶水含量，最终获得改性磷石膏胶凝材料。该方法能够实现无需额外其他渣料配合，直接利用，提高胶凝活性，含有水溶磷以及氟等有害杂质少，且不需要长时间陈化。
Method for modifying ardealite with basic oxide
一种碱性氧化物改性磷石膏的方法
WANG XIN (author) / DING LI (author) / LIU ZHANHUA (author) / LI HONGKE (author) / PENG TAO (author) / PANG GUANHUA (author) / LIU MINGLIANG (author) / GONG XIANGPENG (author) / REN BINGXIONG (author)
2023-02-03
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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