【摘 要】
：
Ammonium phosphate fertilizer is the compounds containing nitrogen and phosphorus that are usually produced through the neutralization reaction of phosphoric acid and ammonia.At present,there are a variety of products,such as slurry monoammonium phosphate
【机 构】
：
Ministry of Education Research Center for Comprehensive Utilization and Clean Processing Engineering
论文部分内容阅读
Ammonium phosphate fertilizer is the compounds containing nitrogen and phosphorus that are usually produced through the neutralization reaction of phosphoric acid and ammonia.At present,there are a variety of products,such as slurry monoammonium phosphate (MAP),diammonium phosphate (DAP),industrial grade MAP,water soluble MAP,water soluble ammonium polyphosphate (APP) and so on.After more than 60 years of development,China\'s ammonium phosphate fertilizer industry has experi-enced the road of from scratch and from weak to strong.The successful development of the slurry MAP technology ended the history that the high concentration phosphate fertilizer cannot be produced by using the medium and low grade phosphate ore.The continuous,stable and large-scale production of DAP plant provides sufficient guarantee for DAP products in China.The development of new ammonium phosphate fertilizer products,such as industrial grade MAP,water soluble MAP,water soluble APP,pro-vides technical support for the transformation and upgrading of phosphorus chemical enterprises.In this paper,the production methods,the development history and the latest research progress of ammonium phosphate fertilizers were reviewed.
其他文献
目的 分析在烧伤科临床见习教学中应用案例式立体教学法的效果.方法 选取2018级临床医学五年制本科见习生200名作为该次的研究对象,按照教学方法不同分成研究组与参照组,每组100名.研究组的见习生采用案例式立体教学法(CTTM),参照组的见习生采用基于案例学习的教学方法(CBL).对两组见习生的专科知识进行测试,对比两组见习生的测试成绩.测试结束后让见习生评价该次的教学质量.结果 两组见习生的基础知识题测试成绩对比,差异无统计学意义(P>0.05).研究组见习生的病例分析题、临床应用题测试成绩以及总分优于
目的 通过健康教育工作的创新模式,为各级妇幼保健院和助产机构提供专业师资培训和规范化管理,以推动和促进昆明市孕妇学校规范化管理和示范孕妇学校创建,为降低孕产妇及婴儿病死率奠定基础.方法 以昆明市为主,云南省部分地州市助产机构中进行孕妇学校规范化建设试点单位招募,通过规范管理试点单位孕妇学校开展,分析影响孕妇健康教育效果的因素,制定对策,制定标准化培训课件,培训师资队伍,提高全市孕产妇健康教育水平,建立孕妇学校长效管理机制.并以该模式向云南其他州市助产机构推广.结果 孕期教育是针对生育阶段专业的健康教育,是
With the development of digital products,electric vehicles and energy storage technology,electronic chemicals play an increasingly prominent role in the field of new energy such as lithium-ion batteries.Electronic chemicals have attracted extensive attent
Basic organic chemicals and high value-added products are mainly produced by hydrocarbon nitridation and oxidation.However,several drawbacks limit the application of the traditional oxidation and nitrida-tion technologies in the future,such as complex pro
There has been a strong interest in technologies suited for mining and processing of low-grade ores because of the rapid depletion of mineral resources in the world.In most cases,the extraction of copper from such raw materials is achieved by applying the
This review compares the different types of membrane processes for air dehumidification.Three main categories of membrane-based dehumidification are identified-membrane contactors using porous membranes with concentrated liquid desiccants,separative membr
目的 探究分析全程保温管理对策对急诊创伤危重患者的影响.方法 将2019年12月—2020年12月作为该次研究的时间节点,选择该院42名急诊医务人员参与该次研究,在2019年12月—2020年6月采取常规保温管理,该组为对照组;在2020年7—12月期间实施全程保温管理,将其命名为观察组.同时选择在该期间92例创伤危重患者参与该研究,根据时间节点不同,分别在对照组和观察组中纳入46例.对比两组管理质量、管理满意度以及管理效果评分情况.结果 观察组管理质量各项评分均高于对照组,差异有统计学意义(P<0.05
目的 将网络教学线上和线下教学相结合的教学方式,通过转化式学习在内科临床见习网络教学中的实施,提高对该校医学本科学生的批判性思维能力.方法 2020年9月—2021年9月在齐齐哈尔医学院2017级临床医学专业抽取120名学生为该次课题的研究对象,随机数字法分成两组,对照组60名,采用病例分析授课,研究组60名,采用转化式学习授课,观察两组学生在SOAP评分表、批判性思维量表、考核成绩等结果数据,评估此教学方法的优势和效果.结果 批判性思维量表数据统计结果为在分析能力、开放思想、批判性思维的自信心、求知欲、
Process optimization in equation-oriented (EO) modeling environments favors the gradient-based opti-mization algorithms by their abilities to provide accurate Jacobian matrices via automatic or symbolic differentiation.However,computational inefficiencies
目的 研究编制现代中医药人才教育培养管理评价量表,为加快构建“守正创新”理念下的中医药人才培养体系提供支撑.方法 运用文献调查、结构访谈法初步建立评价量表框架,以德尔菲专家函询法对指标进行筛选.以探索性因子分析及验证性因子分析,验证量表信效度.结果 量表由5个维度25个指标组成,两轮专家的权威系数分别为0.870、0.876,提示专家权威程度较高,两轮协调系数对比,差异有统计学意义(P0.75,S-CVI/Ave为0.95>0.90,显示量表内容效度(CVI)理想.采用主成分分析法进行因子分析,显示因子总