Advanced Materials Research Vols. 1092-1093

Abstract: In this paper, we jointly use the Pitzer model and the Meissner model to study thermodynamic laws of bioleaching solution in a lean nickel-cobalt ore in the Jilin Baishan, by using the Pitzer model to calculate activity coefficients of single electrolyte aqueous solutions and the Meissner model to calculate activity coefficients of components in the bioleaching solution. Also we studied the rules of activity coefficient of NiSO₄ and CoSO₄ in the solution. Results show that when separating and purifying foreign ions from bioleaching solution of the lean nickel-cobalt ore, the descending sequence of their ion concentration’s effect over the solution is Mg²⁺, Fe³⁺, Fe²⁺, Ni²⁺, Co²⁺ and Ca²⁺.

Abstract: Exploratory experiments were conducted according to the property of a siderite mineral composition and structure has the advantages of simple structure, low grade theory. The siderite Contain Fe 27.46%, Pb 0.97%. First magnetic Fe separation, because of the lower grade ore, for the two stages selection, In 90% of the fineness, good beneficiation indexes, Fe concentrate grade reaches 45.49%, the recovery reached 96.21%. The Fe tailings of magnetic separation in the 90% fineness of flotation tailings Pb test, The tailings in without further grinding conditions, after two stages of cleaning grade is still difficult to improve, Pb concentrate grade of 2.64%, recovery reached 46.96%, Observed in the tests of carbon in tailings interference, because well floatability of carbon, and the dissemination too small it is difficult to remove, so lead to difficulty for improving the grade of the lead concentrate.

Abstract: Considering the serious destruction of S2 section tailgate of Liujia mine 6-7coal seam, the theoretical calculation, numerical simulation and other methods were comprehensively applied to the optimization study on the coal pillar width of very close distance coal seam. Study have shown that the lower roadway must be decorated out of the support pressure range of the upper left pillar. On basis of the theoretical calculation, the paper included the reasonable width of coal pillar is 7-9m.When the width of pillar is 8m, the stability of S2 section tailgate is good. Comprehensive consideration to determine the coal pillar width is 5 meters.

Abstract: XinMiaoxi-Xinbei region fuyu reservoir of lower cretaceous quantou forth group sedimentary period develop large shallow-water delta sedimentary, which based on core data and logging information of 44 wells through the analysis of single well facies and logging facies analysis and the research of sedimentary microfacies. This area incude two kinds of subfacies,delta distributary plain,delta front.15 kinds of microfacies such as distributary channel,underwater distributary channel natural levee. Put forward the "source of phase controlled sand", "channel control reservoir" thought, predicted the main development zone of Fuyu reservoir of XinMiaoxi-Xinbei.

Abstract: The influence of dodecylamine acetate (DDA) and myristyl trimethyl ammonium chloride (1431) on the flotation behavior of muscovite and kaolinite were studied in this paper. The condition which can efficiently separate the muscovite and kaolinite was found out: 5×10^-5mol·L^-1~1×10^-4mol·L^-11431 as collector and pH=5.The feasibility of flotation separation in this condition was validated by artificial mixed minerals separation test. The results of zeta potential measurement, infrared spectrum analysis and adsorption quantity test show that 1431 was adsorbed on the surface on muscovite and kaolinite by static electricity adsorption. The difference of adsorption quantity was consistent with results of the single mineral flotation test.

Abstract: Reservoir evaluation, which works throughout the oil and gas development, has always focused on exploration and development needs ^[1-3].There are many influencing factors and data in the evaluation process, thus it’s difficult to select the reasonable evaluation parameters and methods. Selecting the appropriate evaluation parameters and evaluation methods can improve the accuracy of evaluation, reduce the evaluation workload. Regional studies have shown that Delta-front sub-facies is the major sedimentary type of the Chang 8 in Baibao oilfield, widely distributed delta distributary channel and mouth bar sands are good oil and gas reservoirs in the area. In this paper, cluster analysis reservoir evaluation is using to obtain their correct evaluation parameters, in order to provide the basis for further development.

Abstract: The research is based on conventional microscope experiments, the characteristics of microscopic pore structure of tight sandstone reservoir were analyzed via the constant-rate mercury experiment. This paper selected samples of tight sandstone are from the Southeast area of Erdos basin Sulige gas field. The results showed that the dissolution pore and the intergranular pore were mainly reservoir pore structure types; the bundle throat and the lamellar throat were mainly types of throat in the study area. The mainly configure relations of the pore and throat in this area were big pore - fine / fine throat. Finally, according to constant-rate mercury results, analyzed the impact of pore and throats for percolation capacity respectively, came to the conclusions that the tight sandstone gas reservoirs percolation capability in study area is mainly affected by the throat, and the development degree of the throat determines the final physical characteristics of the reservoir.

Abstract: The experimental results of flotation of pure tetradymite and pyrite show that HL-1 is an efficient collector for tetradymite flotation. Comparing to the butyl xanthate, HL-1 has stronger collector ability and higher selectivity. It solves the common problem of the separation of tetradymite and pyrite. The difference of adsorption quantity is consistent with results of the single mineral flotation test. Through the measurements of adsorption, zeta-potential, and FTIR spectral analysis, the flotation mechanism of tetradymite with HL-1 has been discussed. It is concluded that the adsorption of HL-1 on tetradymite surface is chemical adsorption through the dithiocarbamate group of the collector chelating the Bi (III) of tetradymite to form metal complex.

Abstract: Coal is typical of sedimentary deposits, Occurrence in a coal basin. The original nearly horizontal continuous coal seam was divided into different size; different depth containing coal segment by late tectonic movement, but its scope is not affected by today's "basin" restrictions. With the concept of coal occurrence tectonic unit to reflect the current Coal Occurrence Characteristics and build a prototype coal basin types that prototype into a coal basin tectonic movement after the formation of today's coal occurrence tectonic unit. In Northwest coal hosting area, the main coal bearing strata include Carboniferous-Permian, Upper Triassic, Lower-Middle Jurassic and Lower Cretaceous, and its distribution is regular; the center and strength of coal accumulation were variation in different coal-forming period; the types of basin are multiple, including Passive Margins, Peripheral Foreland, Intracontinental Rift, Intermontane, Strike-slip pull-apart, Strike-slip pull-apart, Inter-montane; moreover, one belt and two rings constitute the tectonic framework of Northwest coal hosting area.

Abstract: On the basis of present relevant research about water aquifer energy for water-drive gas reservoir, systematic evaluation method of water aquifer energy for water-drive gas reservoir is constructed from water invasion recognition, water aquifer size calculation, water influx volume calculation, water aquifer active degree evaluation and drive energy composition analysis. According to static and dynamic data of an actual typical water-drive gas reservoir, water aquifer energy was evaluated systematically. Research results indicated that this method can evaluate water aquifer energy of water-drive gas reservoir quickly and systematically, which can offer reference to development performance forecast and development adjustment of this kind of gas reservoir, and realize reasonable and effective development of this kind of gas reservoir.