豫西铝土矿中镓的赋存状态研究

豫西地区的铝土矿中含有丰富的镓资源。由于对矿石中镓的赋存状态研究程度很低,使镓未能有效回收。通过对铝土矿石的扫描电镜观察、电子探针成分分析、X射线衍射分析,并且完成了在盐酸介质中浸取镓的条件实验,初步得出了元素镓在铝土矿石中的赋存形式主要为:以类质同象置换的形式存在于矿物晶格之中;部分以吸附的形式存在于粘土矿物微粒和铝、铁的氢氧化物表面。     

群库恰克地区井壁失稳影响因素的研究

群库恰克地区钻井复杂事件统计表明,群6、群601及群7井中共发生各类复杂事件129次,严重影响了钻井工程安全和工程进度。对此问题,通过分析失稳井段岩石矿物组分与岩石理化的情况并结合实际钻探中遇到的问题,研究了井壁失稳的主要影响因素,并分析了钻井液在钻探过程中所起的作用及其重要性,为该地区井壁稳定技术的研究提供了合理的依据。     

浅析用开氏法测定煤样中氮元素含量的主要影响因素

概述了开氏法测量煤中氮含量的重要性及其开氏法测定的原理,对测定过程中几方面主要因素的影响进行了较详细的论述分析.指出在测定过程中,必须认真、细致的考虑到各方面的影响因素,才能保证测定结果的准确性.     

催化极谱法连续测定化探样品中钨、钼影响因素的讨论

近年来,国家对基础地质工作投入大量的资金和仪器设备,笔者所在单位承担了大量的1：5万多元素的地球化学区域调查工作。由于极谱分析的廉价、快捷,对于钨、钼等元素的测量依然依赖极谱法。因此,结合前人的工作经验对影响钨、钼测定的主要因素进行了探讨和研究,以便于更好的提高分析质量。     

水热活化法提取粉煤灰中的氧化铝

采用高压水热活化法对预先烧制的粉煤灰进行碱溶实验,探讨钙硅摩尔比、碱液浓度、液固比、苛性比、反应温度、反应时间等影响因素对于氧化铝溶出率的影响。考虑到氧化铝溶出率及反应成本等各方面因素,得出氧化铝溶出的适宜条件。结果表明：碱溶条件下,钙硅摩尔比为1.0,溶液碱浓度为350 g/L,液固比为10∶1,苛性比为14,反应温度280℃,活化时间为2 h。通过氧化铝溶出工艺条件的优化,可使氧化铝提取率达到95％以上。     

Study on extracting alumina from fly ash by compound additive activation method

According to the chemical and mineral composition characteristics of the fly ash, alumina can be extracted from fly ash through the calcining method by using sodium carbonate and calcium carbonate additives. The effects on leaching rate of alumina have been investigated. The results showed that the fly ash can be activated effectively and the leaching rate of alumina can be improved to more than 92% through this method. The best process parameters were the ratio of raw materials, i.e. the material weight ratio of fly ash, calcium carbonate and sodium carbonate was 1.0：1.2：0.9. The activating temperature was 850℃-900℃, activating time was 3 h. This process has a potential application prospect and improves the value of comprehensive utilization of fly ash.     

Influential factors on the exchange rate of dissolved inorganic nutrients at the sediment-water interface in Jiaozhou Bay, China

Incubation experiments are carried out to study the exchange rates of dissolved inorganic nutrients including silicate, phosphate, ammonium, nitrite, and nitrate (vSiO3-Si, vPO4-P, vNH4-N, vNO2-N and vNO3-N) at the sediment-water interface in the Jiaozhou Bay. Major factors influencing the exchange rates are discussed in detail, which include the dissolved inorganic nutrient concentrations in porewater (Cpw), water and clay contents, and grain size of the sediments (CH2O, Cclay and GSsed). The results may provide insight into the dynamics of nutrient transport and the environmental capacity of nutrients in Jiaozhou Bay, and should be beneficial to solving the problems caused by excessive nutrient input this area.     

Influential factors on the exchange rate of dissolved inorganic nutrients at the sediment-water interface in Jiaozhou Bay,China

Incubation experiments are carried out to study the exchange rates of dissolved inorganic nutrients including silicate, phosphate, ammonium, nitrite, and nitrate （^vSiO3-Si,^vPO4-P, ^vNH4-N, ^vNO2-N and ^vNO3-N） at the sediment-water interface in the Jiaozhou Bay. Major factors influencing the exchange rates are discussed in detail, which include the dissolved inorganic nutrient concentrations in porewater （Cpw）, water and clay contents, and grain size of the sediments （CH2O, Cclay and GSsed）. The results may provide insight into the dynamics of nutrient transport and the environmental capacity of nutrients in Jiaozhou Bay, and should be beneficial to solving the problems caused by excessive nutrient input this area.     

STUDY ON THE FORECAST METHOD FOR THE IMPACT OF CROSSWAY ON TIDAL CURRENT FIELD IN SEA AREA

This paper's method simulates the tidal current field near piles to derive and predict the scale oftheir impacts on the tidal current field, and presents the empirically obtained damp coefficient needed inpedicting the current field. The substituted plans used in the prediction are studied using Qingdao.Crossway as an example.     

Study on fluxes of CH4 emission from paddy fields in Changchun area

Little has been done in measurement and research of the flux of CH₄ emission from paddy fields in Changchun area, Jilin Province, China before 1994. So the purpose of the study is to offer available regional data of CH₄ emission flux and to discuss the factors which affect CH₄ emission from paddy fields. Experimental paddy fields are chosen using TM pictures respectively in Xinlicheng (43°49′N, 125°20′E) of the Yitong River’s and in Wanchang (43°44′10″N, 125°53′11″E) of the Yinma River’s alluvial plain. The fluxes of CH₄ emission from paddy fields are measured by the method of static chamber in Changchun area in 3 consecutive years. The research results show that the peak of CH₄ emission from paddy fields occurs during the booting stage. The mean fluxes of CH₄ emission are 7.056 mg/m(² · h) and 0.489 mg/(m² · h) in the paddy fields of flood and discontinuous irrigation respectively. The contrastive study holds that climate condition, the way of water management and fertilizer variation have significant influence on fluxes of CH₄ emission from paddy fields. The difference of climatic conditions causes the interannual change of the flux of CH₄ emission from paddy fields. In general, the flux of CH₄ emission from paddy fields of flood irrigation is greater than that from paddy fields of discontinuous irrigation. To change the way of water management perhaps in an available way to reduce CH₄ emission flux from paddy fields. Foundation item: Under the auspices of Jilin Commttee of Science and Technology (grant 963416 - 1), and Changchun Jingyuetan Remote Sensing Test Site of the Chinese Academy of Sciences (grant 9504). Biography: YAN Min-hua (1964 -), female, a native of Liaoning Province, master, associate professor. Her research interests include climate change, greenhouse gases and wetland climate.     

莒县天宝钛铁矿尾矿选钛的工艺研究

近年来国家对钛的需求越来越大,从钛铁矿中选钛成为急需解决的的问题。莒县天宝钛铁矿通过重-磁联合选矿方法从尾矿中选钛,有效地回收了钛资源,增加了产品品种,拉长了产业链,实现了资源的综合利用,减少了污染和土地占用,保护了环境。