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Comprehensive Utilization Status of Low Grade and Refractory Platinum-palladium Ores from Jinbaoshan of Yunnan Ciyun Chen1, a, Shuming Wen1, b, Qicheng Feng1, c, Hefei Zhao1, d 1Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China accykmust@126.com, bshmwen@126.com, cfqckmust@126.com, dneimengzhaohefei@126.com Keywords: Platinum-palladium ores; Single process; Combined process; Comprehensive Utilization Abstract: It is difficult to handle platinum-palladium ores in Jinbaoshan due to low grade ores, kinds of mineral resources, complex mineral structure, fine-grained dissemination, which is a typical refractory complex ores.
However, the grade of platinum and palladium in the mine is lower, the grade of Pd+Pt generally for 1~5 g/t, and platinum, palladium minerals disseminated extent very fine, copper, nickel content below the cutoff grade in industry, and the useful minerals structure is complex, these reasons make the mine mineral separation is difficult, therefore, it has not been developed and utilized for a long time [5-6].
Nearly half of the PGE minerals distributed in the range of grain -8um [13-14]. 2.3 Minerals composition is complex in the ore Jinbaoshan Platinum-palladium mine deposit is China's largest independent PGM deposits, the platinum and palladium minerals composition and structure are complex in this deposit, more than 90 species minerals are known in this ore, of which precious metal minerals, metallic minerals and non-metallic minerals all have many types [15] and each minerals content in the ore have a larger difference, according to "The study of the typical deposits of Midu County of Yunnan Jin Bao shan platinum-palladium ore ", we can known that the gangue minerals are main minerals in the ore, which content up to 84.7%, while the gangue minerals dominated by serpentine, and its proportion is large in the ore, accounting for the total amount of ore 3/4.
Conclusions 1) The grade of valuable minerals in theJin Baoshan platinum-palladium ore is low, there are many different kinds of minerals in the ore, mineral composition and structure is complex, and valuable minerals micro-fine disseminated with other minerals, is a typical of low-grade refractory ore. 2) Gangue minerals of the serpentine accounted for three-quarters of the total mineral content in the ore, so using the single flotation process to deal with this ore, the flotation concentrates of the content of MgO style difficult to below 20%, it will affect the subsequent smelting process. 3) The disseminated ways of the PGE minerals are complex in the ore, mainly disseminated in the metal sulfides, but also a considerable proportion disseminated in metal oxides and in gangue.
Multipurpose utilization of mineral esources.4(2003)3-6(In Chinese) [24]M.Tang,W.B.Zhang,A study on electrical-chemistry for the flotation in the ultral-fine Pt-Pd ore,J.China mineral magazine.4(2010)82-86 (In Chinese) [25] Y.Z.Yang,S.Jian,X.D.Zhang,Study on Mineral Processing Technique of Platinum-palladium Ore in Jinbaoshan Area, J.

The antioxidant pharmacophore-based structure-activity relationship analysis was assessed by the density functional theory as well as quantum chemical calculations.
Chemistry and biological activities of flavonoids: an overview.
Mishra, Structure-activity relationship of anti-oxidative property of hesperidin, Int. j. pharm.
Sulaiman, Molecular structure and anti-proliferative effect of galangin in HCT-116 cells: In vitro study, Food Sci.
Neto. et al., The basic antioxidant structure for flavonoid derivatives, J.

The improvement of mechanical properties of the ballistic fabric is attributed to the formation of a highly ordered layered structure and the efficient load transfer between the fabric fibers and the graphene nanosheets.
Introduction Although single-layer graphene (SLG)) is defined as a single layer of sp2 carbon in a honeycomb structure, materials comprising more than one layer of graphene are also of interest, including few-layer graphene (FLG, ≤ 10 layers), multi-layer graphene (MLG, >10 layers) and even ultra-thin graphite (UG, < 100 layers) [1].
Kevlar fabric with an area density of 205 g/m2 and following structure parameters: linear density of Kevlar K129 yarns 930 dtex, weave plain, yarn density in warp and weft direction respectively 104 and 106 per 10 cm, fabric thickness 0.31 mm was selected as the substrate for the graphene dispersion deposition.
Kevlar fabric with an area density of 205 g/m2 and following structure parameters: linear density of Kevlar K129 yarns 930 dtex, plain weave, yarn density in warp and weft direction respectively 104 and 106 per 10 cm, fabric thickness 0.31 mm was selected as the substrate for the graphene dispersion deposition.
Kelly, Characterisation of the structure of graphene.

For more than twenty years since the introduction of the CDB technique, numerous comparisons have been made between results obtained from metallic alloys and high-purity reference materials to better understand the chemistry of the defect environment in the solid lattice.
Notably, the surface of each OD-Cu cube exhibits a nanometric amorphous structure.
CDB to Quantify Polymer Infiltration in Mesoporous-Structured Hybrid Solar Cells One of the key challenges in hybrid solar cell technology is quantifying the infiltration of a semiconductive polymer into a mesoporous structure.
After the process a layered structure consisting of the glass substrate, a P3HT-infiltrated M-TiO2* layer and a surface P3HT capping layer is made.
Ferragut: Structure evolution of EV31 Mg alloy, J.

Therefore, the electrochemical cells always have complicated structures; electrical leads are also necessary.
Fig. 3 Typical structure of an electrochemical cell.
The XRD patterns of the final sintered products showed the single phase of orthorhombic perovskite-type structure for the entire Ru content range.
X-ray absorption spectroscopy (XAS) measurements were used to examine the electronic structure of the mixed conducting specimens.
A possible explanation for the formation of electron holes in reducing atmospheres is as follows; supplemental figures of the electronic structures are shown in Fig. 9.

The poly-Ala blocks confer to MSI60 some structure similarity with silk fibroins.
Nagasawa, Mollusk shell structures and their formation mechanism.
Mann (2001) Biomineralization: Principles and Concepts in Bioinorganic Materials Chemistry.
Medakovic, Molluscan shell proteins: primary structure, origin, and evolution.
Takahashi, Structures of mollusc shell framework proteins.

The probability of the recombination of electrons and holes is high in low-dimensional structures, which lead to high efficiency and high energy.
The crystal structure presented broadening of the FWHM with average crystallite sizes of 20.57 and 17.45 nm for both orientations.
Srinivasan, Preparation and characterization of porous silicon photoelectrode for dye sensitized solar cells, Nanosystems: Physics, Chemistry, Mathematics, 7 (2016) 629–632 [8] O.
Pavesi, Porous silicon: a quantum sponge structure for silicon based optoelectronics, Surface Science Reports, 38 (2000) 1-126
Li, Light Absorption Enhancement of Silicon-Based Photovoltaic Devices with Multiple Bandgap Structures of Porous Silicon, Materials, 8 (2015) 5922-5932

These structures can range in size from less than 20 nanometers up to 400 nanometers and are composed of viral protein arranged with icosahedral symmetry [7].
The higher phonon energies chosen are not related to the actual virus’s structure but only for the simulation purpose.
However, the lower phonon can be related to the actual virus’s structure.
It is hoped that the present study may be of help to correlate the structure of biomolecules to their mechanical properties.
Schuster, Topics in current Chemistry, edited by (Springer, Berlin, 2004), Vol. 236, 237. 9.

Much of this earlier research was conceived on the basis of exploitation of indigenous resources using established strengths in ceramic chemistry.
O-sialon (Si2-XAlXO1+XN2-X, where x = 0 - 0.4) has the same structure as silicon oxynitride (Si2N2O), and can be regarded as a solid solution formed by substituting equal amounts of aluminium and oxygen for silicon and nitrogen respectively into the Si2N2O structure.
The structure of the new phase was determined [22] using a combination of diffraction and highresolution imaging techniques, and was found to possess the same sheet structure as O-sialon (Si2-xAlxO1+xN2-x), but with a different stacking arrangement.
Although the crystallites prepared were too small for single-crystal analysis, the structure was solved using a combination of HREM and selected area electron diffraction.
The structure is best described by comparing it with O-sialon [23], and projections of both structures are shown in Fig. 1.

This paper describes the cast structure study of A357 aluminum alloy stress frame casting under consecutive solidification and simultaneous solidification by test and numerical simulation methods, with the conclusions of tensile tests by using of SEM and EDS analysis, the mechanical properties and fracture morphology were observed both under the cast and T6 heat-treatment state.
A357 aluminum alloy (Al-Si-Mg alloy, a group of heat treatable cast Al-Si alloy) was used to produce complex structures and engineering components under medium load, it has been widely used and developed in the aerospace and aviation fields in recent years[1,2].
Due to the compact structure of rod parts under consecutive solidification and simultaneous solidification process, both the tensile strength and elongation maintaining the highest mechanical properties[16].
Precipitation from solid solution, Industrial and Engineering Chemistry.
The effect of quench deformation on the defect structure of quenched metals and alloys, Acta Metallurgica.