离子色谱法测定水中钠、钾、镁、钙

选用IonPAC CS12A色谱柱为分析柱、12 mmol/L甲烷磺酸为淋洗液,抑制电导进行检测,建立了离子色谱检测水中高浓度钠、钾、镁、钙离子的方法。钠、钾、镁、钙离子的标准曲线相关系数均大于0. 999,检测限分别为0. 40,0. 40,0. 05和0. 10 mg/L。分别向纯水、出厂水和水源水中加入这4种离子高、中、低浓度的标准溶液,回收率均在95. 32%～105. 11%,批内标准偏差在0. 000 8～0. 298 7 mg/L,批内相对标准偏差在0. 163 9%～8. 363 5%;批间标准偏差在0. 005 8～0. 177 0 mg/L,批间相对标准偏差在0. 5850%～3. 4913%,具有较好的重复性。该方法操作简便、灵敏度高,检出限、测定下限、精密度和准确度均能达到实验要求且结果可靠,可用于生活饮用水和水源水中钠、钾、镁、钙离子的检测。     

Preparation of activated carbon with low ash content and high specific surface area from coal in the presence of KOH

An activated carbon with ash content less than ]0% and specific surface area more than 1600 m^2/g was prepared from cool and the effect of K-containing compounds in preparation of cool-based activated carbon was investigated in detail in this paper. KOH was used in co-carbonization with coal, changes in graphitic crystallites in chars derived from carbonization of coal with and without KOH were analyzed by X-ray diffraction (XRD) technique, activation rates of chars with different contents of K-containing compounds were deduced, and resulting activated carbons were characterized by nitrogen adsorption isotherms at 77 K and iodine numbers. The results showed that the addition of KOH to the coal before carbonization can realize the intensive removal of inorganic matters from chars under mild conditions, especially the efficient removal of dispersive quartz, an extremely difficult separated mineral component in other processes else. Apart from this, KOH demonstrates a favorable effect in control over cool carbonization with the goal to form nongraphitizable isotropic carbon precursor, which is a necessary prerequisite for the formation and development of micro pores. However, the K-containing compounds such as K2CO3 and K20 remaining in chars after carbonization catalyze the reaction between carbon and steam in activation, which leads to the formation of macro pores. In the end an innovative method, in which KOH is added to coal before carbonization and K-containing compounds are removed by acid washing after carbonization, was proposed for the synthesis of quality coal-based activated carbon.     

红辉沸石吸附性能及其在肥料中应用

以不同粒度改型红辉沸石作为复合化肥的添加剂，探讨了其对肥料中有益组分钾元素的吸附行为。结果显示，改型红辉沸石的添加量为10％、粒度为74μm时，能较好地吸附和实现固定钾，使钾缓慢释放，延长肥料的肥效，同时肥料不结块，可提高成球率，降低成本，有利于贮藏，改善土壤环境。     

跳汰机除杂设施改造

由于地质条件和生产工艺使煤流中软杂质含量较大。通过改进跳汰机除杂设施，严格实施细则、操作程序，大大降低了精煤中的软杂质含量。     

蒙脱石含量测定方法改进研究

用吸蓝量(MB)换算法测定蒙脱石含量,换算系数0.442不能用来准确计算其实际含量。由于吸蓝量和阳离子交换容量(CEC)与蒙脱石含量正相关,通过测定原矿、原矿提纯样以及提纯后杂质矿物的吸蓝量或CEC,进行加权或对比计算,即可得到原矿中蒙脱石的含量,这样可消除膨润土属性、属型等对测定结果的影响。改进的结果表明,不论加权法还是比值法,CEC也可用于测定蒙脱石含量;但加权法计算更为合理。蒙脱石、杂质矿物的纯度,以及它们的吸蓝量、CEC的精密度和准确度,是加权法测定准确与否的关键;比值法适用于细粒级或提纯后纯度较高情况下的测定。     

钾长石制取钾肥的研究进展及前景

简要介绍了我国和世界钾盐资源的分布及钾的供需状况,以及缓解我国缺钾局面的主要途径;着重论述了钾长石制钾肥的研究进展;最后阐述了钾长石提钾中存在的问题及发展前景。     

磷矿共生含钾页岩特征及蚀变法侵钾过程

本文测试和计算了磷矿底板共生的含钾页岩的化学成分，矿物成分，并研究了钾的赋存状态，从天然浸钾过程得到启示，在热力学，晶体结构和反应动力学等三个方面研究了蚀变法的浸变法的浸钾过程。浸钾后的副产品可作为优良的陶瓷原料。     

韩城矿区煤层气赋存特征及开发前景

韩城矿区煤炭资源丰富，1500m以浅，1lOOkm^2。范围内，有煤炭资源100亿t。钻孔瓦斯含量较高，据现有资料最高为26．14ml／g(可燃物)。1994年我们提交了《韩城矿区煤层气赋存状况及远景评价》科研报告，获得煤层气资源量为2080亿m^3，资源丰度约2亿m。／km^2。。此报告上交后，得到总局的重视，1995年煤田地质总局决定在韩城矿区进行地面抽放煤层气试验工作。同年10月，第一口井开钻，现已完成钻探、完井、参数测试和射孔压裂工作，正在排水阶段，气水同时排出，每天出气量在3000m^3。左右，初战告捷。说明本区煤层气赋存条件很好。本区煤层埋藏深度适中，中深部构造简单，煤层渗透率较高，交通便利，市场条件优越，具有良好的开发前景。     

浮选柱分选细粒煤过程中的参数选择

浮选柱在实际生产中，往往由于参数的操作偏差，不通达到预期的分选性能，通过试验，指出了参数的不同选择对浮选柱分选的影响。     

粘粒含量与土的物理力学指标的相关性分析

该文应用数理统计的方法 ,对焦作地区地基土的粘粒含量和土的物理力学性质指标进行了相关性分析 ,总结出一些有借鉴意义的回归方程式 ,并用实测值对回归方程进行了验证 ,表明该回归方程在该地区有一定实用性