从开采石膏矿废弃物中回收石膏的工艺流程研究

石膏矿开采过程中抛弃的大量膏泥，尚含有部分石膏。本文从试验结果出发，论述通过简单的“擦洗－脱泥”工艺流程，可回收供水泥工业用的石膏，变废为宝，缓解石膏供应紧张矛盾，具有一定的现实意义。     

贵州万山汞矿尾矿堆及地表水的环境地球化学特征

对贵州万山汞矿区尾渣堆(主要为炉渣组成)、地表水及河流沉淀物的汞迁移进行了研究。由于赋矿岩石为白云岩，高温煅烧的炉渣中含CaO等碱性物质，炉渣的风化作用释放出汞以及碱性水．流经尾渣堆的地表水碱性强(pH10．6-11．8)、电导率高，且具有明显不同的主要离子组成．万山汞矿矿石单一，主要为辰砂，其他矿石极少，因此炉渣及其渗滤水中除汞外的重金属含量很低．尾渣堆中的汞及碱性物质是对周围环境的主要威胁．在尾渣堆下游汞含量很快降低，约300n，范围内水中的溶解汞从300—1900，ng/L降至72ng／L，而且水的碱性也被中和．但是，由于尾渣堆中的汞及碱性物质含量高，尾渣堆的长时间风化及水流的溶解会将大量汞搬运到周围的土壤及水体并对生物产生不利影响．     

辐射井排渗在栗西尾矿坝的应用

辐射井排渗技术在降低尾矿坝浸润线，避免坝体内水溢出坝面，增强尾矿固结，提高坝体稳定性和渡汛能力的应用中，具有适应地层广，出水量大以及单井控制范围广等优点。不仅排渗效果好，还具有施工对坝体无破坏性的特点。结合我公司所完工的“陕西金堆城钼矿栗西尾矿坝辐射井排渗工程”实例，就辐射井排渗技术在尾矿坝排渗工程的工程设计、工程施工的方法和技术等问题作一探讨。     

Effects of the addition of complexants and bacteria on the soil-plant transfer at metal contaminated sites

Within a series of pot experiments with substrates sampled at heavily to moderately polluted sites of past metal mining activities, it was tried to influence the soil plant transfer of metals via addition of complexants, soil bacteria and perlite. Lettuce （lactuca sativa） was chosen as a universal accumulator plant. A wide range of concentrations in the samples ensures a rather general approach. The goal was to develop a strategy to enable plant growth at metal contaminated substrates for phytoremediation purposes. One contaminated mine tailing from Shiheung/Korea was treated with EDTA, NTA, citric acid, malic acid, NaCl, citrate＋NaCl, as well as compost, to provoke effects from chemical treatment. This should yield low molecular metal complexes in the soil solution and provide a carbon source to natural soil life. Other samples from Shiheung, from Okdong mine tailings, Okdong farmland, as well as from three contaminated sites from a medieval mine tailing at Oberzeiring/Styria/Austrias were treated with Cd- adapted soil bacteria, perlite, and soil bacteria and perlite, to impose of changes in microbial life directly. Fresh mine tailings are low in microbial life and plant- available nitrogen, whereas in the contaminated Austrian medieval samples, conditions have had time to adapt for more than 600 years. In the test substrates, supply with nutrient nitrogen was low, supply with nutrient phosphorus was low to adequate, and supply with potassium and sulfate was adequate. Effects of various additives on the plant yield mainly depend on the initial nutrient status. After harvest, the soils were parted in root soils and bulk soils to recognize possible differences. The lettuce plants were parted in leaves and roots. The solids were characterized by convential methods and aqua regia digestion, as well as by a Tessier-type sequential leaching procedure. The plant samples were digested with HNO3/HClO4. Basically, sample solutions were simultaneously read for 23 elements in ICP-OES in appropriate dilutions. Various treatments result in concentration shifts in root soil, bulk soil, plant roots and plant leaves. Interpretation is not easy, but physiologically active elements or contaminants are usually more involved.     

找矿哲学在紫金矿业中的应用

随着地表找矿难度的日益加大,目前的找矿目标应从以地表找矿为主转到地下找矿为主,这就需要有更高层次的找矿哲学作指导来提高找矿的成功率。紫金矿业合理利用废弃的毛石充分体现了找矿哲学思想,这样做提高了企业效益,再通过联合经营使资源枯竭型矿山企业走上可持续发展之路。     

卡拉-波罗的海采矿联合体尾矿地段地下水污染形成的条件

因为工业和农业的迅速发展、日常生活垃圾的增多，以及许多其他因素，已经导致各地地表水的大量消耗和污染，所以地下水污染监测是最迫切的问题之一。只有受到严格保护的地下水才是满足居民饮用水的最可靠的储备。     

矿山固体废物的环境效应研究进展及大冶铜绿山尾矿的环境效应

矿山固体废物的环境效应研究进展及大冶铜绿山尾矿的环境效应王亚平鲍征宇王苏明（中国地质大学,武汉４３００７４）（山西地勘局水文勘查院,太原０３００２４））关键词矿山固体废物尾矿环境效应大冶铜绿山矿山的环境效应主要是指固体废物的污染。固体废物的污染已经成...     

湖南湘西金矿尾矿的地质地球化学特征与二次开发前景

对湖南湘西金矿尾矿的堆存,分布特征及其化学组成,微量元素含量等进行了初步研究,结果发现：尾矿中贵,重金属元素如Ａｕ,Ｓｂ,Ｗ,Ｐｂ,Ａｓ等含量较高,因此,尾矿不仅是矿区的潜在污染源,而且是一种重要的后备资源,具有较大的二次开发前景。     

利用山东焦家金矿尾矿制作玻化砖的研究

山东焦家金矿是中国最大的金矿之一。该金矿尾矿化学成分接近于常见商品玻化砖的化学成分,其矿物组成以石英及长石为主,接受于常见面商品玻化砖的配料,实验表明,以８０％尾矿加２０％高可塑怀粘土民的试样,其最佳煅烧温度为１１５０℃,吸水率〈０．２％的烧成温度的可变化范围是３０℃,板状试样经煅烧后不变形,不开裂,抗压强度可达２９５ＭＰａ,颜色美观,光泽度等达到了普通商品玻化砖的水平。