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含钒转炉渣中和钛白废酸的试验研究钱强1(1.四川省攀枝花市攀钢集团钢城企业总公司 )摘 要:攀钢在钒钛资源综合利用过程中产生了大量的含钒转炉渣和钛白废酸固,液废弃物,通过实施"以废治废"的新型利用理念,在常温下,液固比为5∶1进行配比,浸泡1 h后钒浸出率达到71.16%,酸浸液可作为提钒原料使用,而酸浸渣则可作为石膏替代品,在达到中和目的的同时,实现废弃资源的再利用.关键词:含钒转炉渣； 钛白废酸； 中和； 浸出率； 石膏替代品......
; 文章编号:1672-7207(2016)01-0330-08 Motion characteristics of gypsum slurry in wet-type desulphurization tower LIU Jiayu1, LIU Yaming2, HAO Yajie1, YUAN Zhulin1, YANG... for droplets greater than 0.8 mm. Meanwhile, the residence time is also reduced. Key words: gas-liquid flow; momentum transfer; numerical simulation; flue gas desulfurization; gypsum rain 石灰石-石膏湿法烟气脱硫技术如......
, such as silicate, calcium and aluminum-containing salts, were also studied. The results show that gypsum in water-saturated fluorgypsum mainly exists in form of calcium sulphate dihydrate, and crystal water of water-saturated fluorgypsum is mainly dehydrated and hemihydrated gypsum is formed at 120-150 ℃. The fluorgypsum powder with 4.2% external modifiers after being calcinated at 200 ℃ for 2 h can......
采空区稳定性对主斜井安全性的影响分析 仲维光1,李明2,郑怀昌2,刘志河2 (1.枣庄市峄城区建材局,山东,枣庄,277300;2.山东理工大学,山东,淄博,255049) 摘要:在现场调查的基础上,针对某石膏矿采空区的分布状态及存在问题,运用Flac3D软件模拟分析了采空区的垮落对主斜井安全性的影响,为防治主斜井破坏提供了依据. 关键词:采空区; 顶板垮落; 主斜井; 安全性; 模拟; 石膏矿; worked-out areas; roof fall; main inclined shaft; safety; simulation; gypsum mine; [全文内容正在添加中] ......
of specimens are caused by the formation of gypsum, not by ettringite. The decompositions of calcium carboaluminate are caused by sulfate attack and lead to further deterioration of specimens. The main reasons for their deteriorations are gypsum expansion, as well as the decomposition of hydration product. If the environmental conditions can be suspicious of external sulfate attack, the complex cement......
treated by lime neutralizing is gypsum (CaSO4·2H2O). The second-step slag products treated by sodium hydroxide neutralizing are Fe2Mn0.5Zn0.5O4·nH2O and Fe3O4. Compared with lime neutralization method, the slag products in two-step neutralization method are much less and have comprehensive utilization value. Key words: acid mine drainage; two-step neutralization; gypsum; ferrite 在矿山开采,矿石运输,选矿,废石......
Alabaster and Selenite Gypsum: I-Dehydration-Rehydration Comparison StudiesEl-Sayed LAl-WakeelChemistry Department, Faculty of Science, Suez Canal University, Ismailia, Egypt摘 要:<正>Two types of gypsum raw materials, selenite and alabaster, were used to prepare dental stone (a-hemihydrate). Gypsum lumps (0.82.5 cm) were hydrothermally treated......
用石膏制备硫酸钾的工艺 钟辉1,肖仁明1,杨建元1 (1.成都理工学院应用化学系,成都 610059) 摘要:提出了天然石膏二段转化法制硫酸钾,附产轻质碳酸钙,氮钾复肥的新工艺,研究了转化工艺条件和工艺参数.石膏转化率大于97％. 关键词:石膏; 硫酸钾; 转化; 复合肥料; Gypsum; Potassium sulfate; Conversion; Compound fertilizer; [全文内容正在添加中] ......
; 强度; 水化机理; desulphurization gypsum; binding material; strength; hydrating mechanism; [全文内容正在添加中] ......
减水剂对脱硫石膏胶凝材料作用的研究 李福元1,周富涛2,石宗利3 (1.兰州归一建材科技有限公司,兰州,730070;2.兰州交通大学机电学院,兰州,730070;3.湖南大学材料学院,长沙,410082) 摘要:系统研究了萘系和磺化三聚氰胺系两种不同类型减水剂对石膏水化进程,宏观性能和硬化体微结构的影响,以及不同的减水剂掺法对脱硫石膏性能的影响.根据性能测试结果,探讨了减水剂的作用原理,明确了减水剂的使用范围和使用方法,为石膏减水剂的开发和合理应用提供参考. 关键词:减水剂; 脱硫石膏; 胶结性能; water-reducing agents; flue gas desulphurization(FGD)gypsum; cementing property; [全文内容正在添加中] ......
