| 磷石膏转晶制备α型高强石膏工艺条件的优化研究 |
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| 引用本文： | 曾映,晏波,阮运春,张涛,田仁道,胡宏,聂登攀.磷石膏转晶制备α型高强石膏工艺条件的优化研究[J].无机盐工业,2022,54(11):112-117. |
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| 作者姓名： | 曾映 晏波 阮运春 张涛 田仁道 胡宏 聂登攀 |
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| 作者单位： | 1.贵州民族大学化学工程学院，贵州 贵阳 5500252.瓮福（集团）有限责任公司 |
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| 基金项目： | 国家重点研发计划(2018YFC1903505);黔南州科技计划项目(黔南科合（2019）121号);贵州省科技计划项目(黔科合支撑[2020]4Y014号);贵州省科技计划项目（黔科合支撑[2021]一般484） |
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| 摘 要： | 以工业固体废弃物磷石膏为原料，采用半液相蒸压法制备α型高强石膏。以蒸压温度、蒸压时间、1#转晶剂、2#转晶剂以及料浆含水率为因素，进行了5因素4水平的正交实验。以力学性能为指标，对磷石膏转晶制备α型高强石膏的工艺条件进行了优化研究。结果表明，在反应温度为137 ℃、料浆含水率为20%（质量分数）、1#转晶剂用量为0.3%（质量分数）、2#转晶剂用量为1.27%（质量分数）、反应恒温时间为20 min时，可以制得2 h抗折强度、2 h抗压强度以及绝干抗压强度分别达7.0、21.7、44.7 MPa的α型高强石膏。
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| 关 键 词： | 磷石膏 α型高强石膏 转晶 |
| 收稿时间： | 2022-01-06 |
Study on optimization of technological conditions for preparing α high-strength gypsum from phosphogypsum by crystal conversion |
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| ZENG Ying,YAN Bo,RUAN Yunchun,ZHANG Tao,TIAN Rendao,HU Hong,NIE Dengpan.Study on optimization of technological conditions for preparing α high-strength gypsum from phosphogypsum by crystal conversion[J].Inorganic Chemicals Industry,2022,54(11):112-117. |
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| Authors: | ZENG Ying YAN Bo RUAN Yunchun ZHANG Tao TIAN Rendao HU Hong NIE Dengpan |
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| Affiliation: | 1. School of Chemical Engineering，Guizhou Minzu University，Guiyang 550025，China2. Wengfu Group Co. ，Ltd. |
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| Abstract: | Based on industrial solid waste phosphogypsum as raw material，α high-strength gypsum was prepared by semi-liquid autoclave method.By taking autoclave temperature，autoclave time，1# crystal conversion agent，2# crystal conversion agent and slurry moisture content as factors，an orthogonal test of 5 factors and 4 levels was carried out.By taking the mechanical properties as an index，the process conditions for the preparation of α high-strength gypsum by crystal conversion were optimized. The results showed that when the reaction temperature was 137 ℃，the slurry moisture content was 20%（mass fraction），the dosage of 1# crystallizing agent was 0.3%（mass fraction），the dosage of 2# crystallizing agent was 1.27%（mass fraction），and the constant temperature of reaction was 20 min，α high-strength gypsum with 2 h flexural，2 h compressive and dry compressive strengths of 7.0，21.7 and 44.7 MPa could be prepared，respectively. |
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| Keywords: | phosphogypsum α high-strength gypsum crystal conversion |
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