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Journal of Environmental Science and Engineering(B) 2012年第7期1卷 827-831页

作者： Martin K. Kambing'a Stephen Syampungani Department of Forest Resource Management School of Natural Resources The Copperbelt University Kitwe 21692 Zambia

To facilitate the development of the basis for the selection of plants for re-vegetating tailings in Zambia, an as sessment of the performance of tree species growing on tailings dams was conducted. The performance of species was determined in terms of relative density, frequency and importance value for each species. The study reveals variations in performance of species; for example in terms of importance values, Acacia polyacantha （33.5%）, Toona ciliata （21.4%）, Acacia sieberana （9.9%）, Bauhinia thonningii （9.1%） and Peltophorum africanum （8.3%） were the most dominant species. The dominance of these species on tailings dams demonstrates tolerance to railings dams conditions. The study recommends that emphasis must be placed on these species in re-vegetating tailings dams.

关键词： tailings tree performance re-vegetation importance values.

Behavior of Iron Magnetization and Magnetic Separation During Roasting Cyanide tailings

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Behavior of Iron Magnetization and Magnetic Separation Durin...

Analyzing the Characteristics and Available Attributes of Skarn Gold Deposit tailings

2011中国材料研讨会

作者： Zhao-hui Zhang a,Bai-long Liu b School of Metallurgical Engineering,Xi''an University of Architecture and Technology,Xi''an 710055,Shaanxi,China

Given the comprehensive utilization problems of tailings in gold smelting,the behavior of iron in the roasting process is discussed in this paper and the optimal conditions are obtained through reduction roasting of the cyanide *** results show that the amount of iron in the cyanide tailings is 35.55%,but the amount of magnetic iron is only 0.28% of all the *** iron ore concentrate with iron grade of 52.81% and recovery of only 20.43% can be obtained by high-intensity magnetic separation to the cyanide *** being reduction roasted at the conditions of 750℃,addition volume of pulverized coal 6%,1h and water cooling,the magnetic iron reached up to 84.83%.Have low-intensity magnetic separation on the roasted tailing,the iron grade of the iron ore concentrate is 64.39% and the recovery is 84.67%.

关键词： tailings reduction roasting magnetic iron magnetic separation recovery

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矿物学报 2013年第S1期33卷 14-14页

作者： CHENG Yun-hong HUANG Fei LI Guang-lu YANG Qing-yu HAN Peng LIU Rui Northeastern University Jilongshan Gold Mining Co. LTD

Skarn gold deposit tailings is a kind of tailings which is difficult to be utilized effectively. Taking a skarn gold deposit tailings from Hubei province, in China, as an example, the paper has tested and analyzed the tailings, and studied the characteristics and available attributes of the tailings, and provided scientific and efficient utilization approaches of tailings in the area of building materials further. The results showed that major mineral phases in the tailings is quartz, particle sizes of the tailings mainly exist in 10–100 μm, and the tailings has no pozzolanic activity. As a result, this kind of tailings can be used for building sand, and can be used as supplementary cementing material of concrete based on

关键词： skarn gold deposit tailings available attributes

Process Optimization on Purification of Hydrochloric Acid Leachate of Asbestos tailings

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地学前缘 2009年第S1期16卷 177-177页

作者： Gaoxiang Du~(1,2),Baikun Wang~1 1.School of Materials Science and Technology,China University of Geosciences(Beijing),Beijing 100083,China. 2.Hebei Yingdu Composite Materials Co.,Ltd,Xingtai,China

The main components of the hydrochloric acid leachate of the asbestos tailings were MgCl2,FeCl3, FeCl2,AlCl3 and surplus *** experimental study on optimization of purification process of acid leachate focusing on preparing magnesium hydroxide solution was carried *** main approach used in the experiment was to oxidize Fe2+to Fe3+,and then purified it by the precipitation reaction with alkali.

关键词： asbestos tailings acid leachate purification

Influences of Microbial Oxidation/Reduction on Mineral Transformation in Sulfide tailings and Environmental Consequence in Shizishan Cu-Au Mine, Tongling, Eastern China

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矿物学报 2013年第S1期33卷 64-64页

作者： LU Xiancai LU Jianjun WANG Rucheng WANG Hongmei LI Juan ZHU Tingting OUYANG Bingjie School of Earth Sciences and Engineering State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences

Mining activities have created great wealth, but they have also discharged large quantities of tailings. As an important source of heavy metal contamination, sulfide tailings are usually disposed of in open-air impoundments and thus are exposed to microbial oxidation. Microbial activities greatly enhance sulfide oxidation and result in the release of heavy metals and the precipitation of iron (oxy) hydroxides and sulfates. These secondary minerals in turn influence the mobility of dissolved metals and play important roles in the natural attenuation of heavy metals. Elucidating the microbe–mineral interactions in tailings will improve our understanding of the environmental consequence of mining activities.

关键词： microbial reduction/oxidation sulphide tailings mineralogical composition heavy metals Shizishan Cu-Au mine

Secondary Minerals of Weathered Orpiment-Realgar-Bearing tailings in Shimen Carbonate-Type Realgar Mine,Changde, Central China

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矿物学报 2013年第S1期33卷 147-147页

作者： ZHU Xiangyu WANG Rucheng LU Xiancai State Key Laboratory for Mineral Deposit Research School of Earth Sciences and EngineeringNanjing University

Formation and dissolution of secondary arsenic minerals often play significant roles in controlling arsenic mobility in contaminated environments, especially in sulfide mines. Weathering of the orpiment and realgar-bearing tailings from the Shimen realgar deposit, the largest realgar deposit in Asia, were studied. An integrated mineralogical analysis by using X-ray powder diffraction (XRD), Raman spectrum, scanning electron microscope (SEM) and transmission electron microscope (TEM) reveals four kinds of As-bearing secondary minerals including arsenic oxides, arsenates, As-gypsum, and As-Fe minerals. The precipitation of arsenates is due to interaction of As-bearing run-off waters and the underlying carbonate rocks, or the transformation of gypsum into arsenates or As-bearing gypsum through SO42-/HAsO42- substitution. Ca-arsenates are mainly weilite and pharmacolite with Ca/As atomic ratio of 1. Scanning transmission X-ray microscope (STXM) and X-ray absorption fine structure (XAFS) reveal that the valence of arsenic is mainly +3 and +5.

关键词： weathering arsenic tailings secondary arsenic minerals Shimen realgar deposits

Early Intervention on the Properties of Steel Slag at High Temperature by Modifier Compound with tailings: A Feasible Way for Comprehensive Utilization of Solid Wastes

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矿物学报 2013年第S1期33卷 49-49页

作者： LIAN Fang ZHANG Zuoshun MA Laijun Bater Sayin LIAO Hongqiang School of Materials Science and Engineering University of Science and Technology Beijing Technical Center of Shougang Environment Protection Industry Department

Steel slag, a by-product of the steel production industry reaches 10%–15% of crude steel output (Motz and Geiseler, 2001). Their main application lies in the field of building materials due to some containing cementitious components, such as dicalcium silicate (C2S) and tricalcium silicate (C3S) (Waligora et al., 2010). However, blended cements with steelmaking slag show low early hydration activity, low compressive strength and bad durability because steel slag generates above 1600 ℃ with the tense and large grain size crystals, consisting of low content of C2S and C3S and high proportions of f-CaO and f-MgO compared with cement clinker.

关键词： steel slag early intervention high temperature modifiers tailings building materials

Study on the Effect and Mechanism of Calcination of Asbestos tailings Mixed with Ammonium Sulfate

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矿物学报 2013年第S1期33卷 82-82页

作者： SONG Bei LIU Chao ZHENG Shuilin WANG Tongtong ZHAO Jian School of Chemical and Environmental Engineering CUMTB

The research involves the calcination of Sichuanshimian asbestos tailings with ammonium sulfate in order to extract magnesium. This paper studies the effect of different calcination conditions on the magnesium extraction rate, and it also studies the mechanism of calcination of asbestos tailings mixed with ammonium sulfate. The results were characterized by XRD, TGA and elemental analysis. The results showed that as the temperature rises the magnesium extraction rate first increases and then decreases. Optimal experimental conditions are calcination temperature of 600℃, calcination time of 1.5 h, the amount of sodium added of 20%, under which condition a magnesium extraction rate of 85.16% can be achieved.

关键词： asbestos tailings calcination extraction rate

Extraction of Rare Earth from K-rich Syenite tailings

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矿物学报 2013年第S1期33卷 8-8页

作者： BAO Tingting YANG Jing MA Hongwen School of Materials Science and Technology China University of Geosciences

The application of K-rich nephline syenite ores would produce some tailings, which will cause many disadvantages such as more land occupation. In this research, an process was obtained to extract rare earth from the K-rich nephline syenite tailings of Gejiu, Yunnan province, China. This tailings mainly composed of K-feldspar, biotite, magnetite, andradite, nepheline and 0.1% rare earth. The chemical compositions are shown in Table 1.

关键词： K-rich syenite tailings rare earth extraction hydrochloric acid oxalic acid