共查询到19条相似文献,搜索用时 140 毫秒
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青海察尔汗盐湖开采晶间卤水 ,通过盐田滩晒析出光卤石 ,然后从盐田采收光卤石输送到加工厂生产钾肥。盐田生产的好坏直接制约着加工厂工艺流程的选择、产品质量和成本。因此盐田管理是钾肥生产的龙头。目前盐田工艺控制主要以Na+ 、K+ 、Mg+ + / /Cl-—H2 O四元水盐体系相图理论为基础 ,但在实际应用中发现该相图仅能进行定性控制和分析 ,不便于操作与定量管理。文章结合该体系相图理论数据和实际试验数据 ,应用数理统计和计算机 ,建立了其数学模型 ,对生产管理具有较强的可操作性和较高的精度 ,期望能对推动察尔汗盐田工艺技术管理的进步有所裨益 相似文献
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察尔汗盐湖卤水相图数学模型的建立及应用 总被引:3,自引:1,他引:2
青海察尔汗盐湖开采晶间卤水,通过盐田滩晒析出光卤石,然后从盐田采收光卤石输送到加工厂生产钾肥。盐田生产的好坏直接制约着加工工艺流程的选择、产品质量和成本。因此盐田管理是钾肥生产的龙头。目前盐田工艺控制主要以Na^ 、K^ 、Mg^ //Cl^-H2O四元水盐体系相图理论为基础,但在实际应用中发现该相图仅能进行定性控制和分析,不便于操作与定量管理。文章结合该体系相图理论数据和实际试验数据,应用数理统计和计算机,建立了其数学模型,对生产管理具有较强的可操作性和较高的精度,期望能对推动察尔汗盐田工艺技术管理的进步有所裨益。 相似文献
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中原盐田是近年来发现并开发的较大型盐矿之一。中原盐田的发现,结束了河南不产盐的历史。本文回顾了几年来在矿山开采、制盐及生产管理中的经验与存在问题。为了进一步提高盐质.促进盐化工发展。提出了做好计划开发中原盐田,必须合理开采利用盐资源,加强科学管理,探索出一条振兴河南盐业经济发展的新途径。 相似文献
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青海察尔汗盐湖是我国已探明储量最大的可溶性钾镁盐矿床,同时也是我国唯一的大型钾肥生产基地。文章根据多年对盐田生产定期取样分析的研究,系统探讨了大面积深水盐田的成矿机理与管理方法,对生产具有较强的指导意义。 相似文献
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通过建设新型盐田的实践,探讨了新型盐田建设中存在的问题,提出了解决问题的措施,并用盐田综合效益提高的事实,证明了在江苏盐场进行新型盐田建设决策的正确性。 相似文献
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文章从舟山古代海盐生产、贮存以及盐业管理历史着手,对舟山海岛的盐文化地名进行了系统的分析,探讨盐亭、盐灶、盐盘、盐仓、盐廒、盐厂、盐墩等海盐生产管理要素对舟山地名文化的影响,其中盐墩、盐厂对舟山海岛地名文化的影响最为深远,相关的盐文化地名数量最多、分布较广。 相似文献
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金代是中国封建社会后期继契丹族之后由女真族建立的一个封建王朝,它统治中国淮河以北广大地区长达100多年。自金太宗天会五年(1127)正月金军攻取河东,解州盐池即归金朝统辖。金初,解州盐池的生产仍实行集工捞采的原始方法,进行粗放劳动,产销由政府垄断。到蔡松年任户部尚书时才恢复了北宋范祥的钞引法,改官运官销为商运商销。河东盐(解盐)的管理,初期多循辽之旧规,其后多仿宋制。盐课在政府财政收入中占有举足轻重的地位。金后期对食盐课以重税,导致盐价一涨再涨。由于商运商销政策的实施,金代中期以后,河东盐池附近也出现了一定数量的以运销解盐为生计的专业的运盐商队。 相似文献
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唐代鄂尔多斯高原地域的盐、夏、灵诸州分布着众多的盐池,成为唐代第二大池盐生产地。隋唐时期生产技术明显发展,垦畦吹晒法的普遍推行使该地域的池盐产量和质量不断提高。对于该地域的盐业管理,经历了前后两个明显不同的时期。唐代前期继承隋代宽松的盐业政策,允许私人生产和销售池盐。唐代后期则经过几次盐法改革,开始逐步实行食盐专卖制度,由国家垄断盐利。 相似文献
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文章对艾丁湖天然无水芒硝的分布、特征、形成机理进行了研究 ,得出天然无水芒硝的成因 ,为利用太阳能技术生产无水芒硝提供理论依据。 相似文献
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Trace element chemistry of coal bed natural gas produced water in the Powder River Basin, Wyoming 总被引:2,自引:0,他引:2
Coal bed natural gas (CBNG) produced water is usually disposed into nearby constructed disposal ponds. Geochemistry of produced water, particularly trace elements interacting with a semiarid environment, is not clearly understood. The objective of this study was to collect produced water samples at outfalls and corresponding disposal ponds and monitor pH, iron (Fe), aluminum (Al), chromium (Cr), manganese (Mn), lead (Pb), copper (Cu), zinc (Zn), arsenic (As), boron (B), selenium (Se), molybdenum (Mo), cadmium (Cd), and barium (Ba). Outfalls and corresponding disposal ponds were sampled from five different watersheds including Cheyenne River (CHR), Belle Fourche River (BFR), Little Powder River (LPR), Powder River (PR), and Tongue River (TR) within the Powder River Basin (PRB), Wyoming from 2003 to 2005. Paired t tests were conducted between CBNG outfalls and corresponding disposal ponds for each watershed. Results suggest that produced water from CBNG outfalls is chemically different from the produced water from corresponding disposal ponds. Most trace metal concentrations in the produced water increased from outfall to disposal pond except for Ba. In disposal ponds, Ba, As, and B concentrations increased from 2003 to 2005. Geochemical modeling predicted precipitation and dissolution reactions as controlling processes for Al, Cu, and Ba concentrations in CBNG produced water. Adsorption and desorption reactions appear to control As, Mo, and B concentrations in CBNG water in disposal ponds. Overall, results of this study will be important to determine beneficial uses (e.g., irrigation, livestock/wildlife water, and aquatic life) for CBNG produced water in the PRB, Wyoming. 相似文献
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Knappett PS McKay LD Layton A Williams DE Alam MJ Huq MR Mey J Feighery JE Culligan PJ Mailloux BJ Zhuang J Escamilla V Emch M Perfect E Sayler GS Ahmed KM van Geen A 《Environmental science & technology》2012,46(3):1361-1370
Ponds receiving latrine effluents may serve as sources of fecal contamination to shallow aquifers tapped by millions of tube-wells in Bangladesh. To test this hypothesis, transects of monitoring wells radiating away from four ponds were installed in a shallow sandy aquifer underlying a densely populated village and monitored for 14 months. Two of the ponds extended to medium sand. Another pond was sited within silty sand and the last in silt. The fecal indicator bacterium E. coli was rarely detected along the transects during the dry season and was only detected near the ponds extending to medium sand up to 7 m away during the monsoon. A log-linear decline in E. coli and Bacteroidales concentrations with distance along the transects in the early monsoon indicates that ponds excavated in medium sand were the likely source of contamination. Spatial removal rates ranged from 0.5 to 1.3 log(10)/m. After the ponds were artificially filled with groundwater to simulate the impact of a rain storm, E. coli levels increased near a pond recently excavated in medium sand, but no others. These observations show that adjacent sediment grain-size and how recently a pond was excavated influence the how much fecal contamination ponds receiving latrine effluents contribute to neighboring groundwater. 相似文献