Advanced Materials Research Vols. 881-883

Abstract: The Eastern Tianshan is a type of mineralization belt, Shilipo copper, deposit is new discoveried one at Eastern Tianshan, bearing in maroon basaltic tuff. Some basalt shows red color, which has certain similarity to hematite mineralization development in the Jiweinuo copper deposit. From geochemical characteristics analysis, it is proven that the formation of Eastern Tianshan copper relates to the mineralization of the mantle plumes. That only the Emeishan basalt in Sichuan Province contains the copper in China, which shows the preliminary scale was reported and after that, caused the heated debates. The most thought that the copper has the relation to the mantle plumes. Similar deposit was reported in America as well, such as the Jiweinuo Cu deposit in Subilier Lake. Such make us consider if the formation of the belted copper deposit in Dongtianshan has the relation to the mantle plumes. For confirm this result, we respectively chose two basalt samples from Shilipo and Heilongfeng mineral occurrences in order to analyze their constant, trace and rare earth element content and preliminarily research their geochemical characteristics.

Abstract: It is known that to extract nickel from nickel-bearing laterite ore is not an easy job. By reducing roast-magnetic separation, an effective result is achieved in this research in dealing with nickel-bearing laterite ore due to its simple technology process and the high nickel recovery. Nickel-bearing laterite studied in this research is mainly characterized by fine disseminated grain size and easy argillation. Thus, valuable mineral (i.e. nickel oxide) can not be effectively separated from the nickel-bearing laterite ore simply by regular mineral processing technology. To solve the problem, both reducing roast and wet magnetic separation are adopted in the study with the purpose of making up the lack of dynamics so as to reduce the reduction temperature of nickel laterite. Flux catalyst is added to strengthen the reducing reaction of nickel oxide and iron oxide. The optimistic experimental conditions are determined as following: the consumption of the flux catalyst agent and the reducing agent are 5% and 4% (by weight) respectively, the reduction temperature remains at 1200°C, the reduction time is 2h, and the appropriate magnetic field intensity is 240 RA/m. The research findings show that the nickel grade of the concentrate increases from 1.58% to 5.49%, with its recovery reaching above 80 %.

Abstract: The paper systematically analyzed the relationships between geological conditions including strata and magmatic rock, etc and lead-zinc deposits, and found out their control action and features on Pb-Zn and Fe-Sn deposits, then established the comprehensive prospecting model for Pb-Zn and Fe-Sn deposits that consisted of geological, geochemical and mineralization information, which will provide theoretical basis for predicting the lead-zinc metallogenic deposits within this metallegenic belt.

Abstract: This paper is aimed at a typical complex polymetallic copper-zinc sulfide ores in Yunnan province, China, and adopted the process of bulk floatation discarding tailing under coarse grinding condition, the influence factors are researched such as grinding fineness, types and dosage of flotation reagents. When the coarse grinding size-74μm 75% and butyl xanthate and ethyl xanthate as combination collector, The amount of flotation discarding tailing is 60% for crude ores, the tailings contain 0.058% Cu, 0.027% Pb and 0.12% Zn, the loss rate of various metals in tailing is 3.21% Cu, 5.49% of Pb and 3.35% of Zn. This research has referenced significance to economical development and utilization of copper-zinc sulfide ore resources.

Abstract: The Lower Carboniferous Series Yamansu Formation volcanic rocks in eastern Tianshan are composed of basic and neutral-acid rock types, and defined as the calc-alkaline series. These volcanic rocks have the features of the typical island-arc or the continental marginal arcs. The result of the Rare Earth Elements shows that the negative anomaly of the Nb, Sr, P and Ti in the neutral-acid rocks, and it might be caused by the continental crust involved. The REE changes curves lean to the right smoothly. The LREE is enrichment and δEu is negative anomaly show that the rocks could have the same source, and the magma could go through the strongly fractional crystallization processes. The fault belt and the volcanic and sedimentary formation controlled regional mineralization. The metallogenic materials are enriched surrounding the rock mass. The stratum are abundant of copper and zinc, so that is very important to study its geological and geochemistry features in this area.

Abstract: Cylindrical magnetic medium (rod matrix) serves as the carrier for magnetic particles in pulsating high gradient magnetic separation (PHGMS), which has been widely applied to beneficiate hematite, ilmenite, limonite, siderite, wolframite, etc., in the mineral processing industry and to purify wastewater. The arrangement of rod elements in the matrix plays a decisive role in the magnetic field distribution and in the movement of particles in the matrix, thus generating a significant influence on the performance of PHGMS. The effect of feed solids on PHGMS is investigated in the 3 mm rod matrix of different spacings between rods in a single matrix layer, by Slice-Matrix Analysis; it was found that there is a maximum feed solids for a given matrix; beyond this feed solids, the performance of PHGMS deteriorates significantly.

Abstract: Based on the geological and the experimental data of the13^#coal seam of Sun-Cun Coal Mine, the relationship curve between the geothermal heat in Sun-Cun coal mine and experimental wind speed has been fit out.According this and the laboratory experiments,the relational expression between the quantity of CO₂ produced in the period of spontaneous combustion and the wind speed in the coal mine has been developed. The research results show that when the wind speed exceeds 2m/s,the quantity of CO₂ produced has a sharp rising tendency.

Abstract: Wang Longzhuang Block has entered the middle or later stage of high water cut and high recovery, quantity of remaining oil still remain in the reservoirs. The paper establishes the fine three-dimensional geological modeling on the basis of reservoir description of Wang Longzhuang Block, including the structure modeling, sedimentary microfacies modeling, reservoir parameter modeling and liquid distribution modeling, which forming the fine reservoir description of three dimensional visualization, and those provide evidences for the studies of the distribution of remaining oil in Wang Longzhuang Block.

Abstract: The surface magnetization without adding any iron-containing substance as a magnetic seed is called self-magnetization. Tests show that temperature and pH of the slurry are two important factors in the self-magnetization of siderite and its synergic effect on hematite; that the self-magnetization took place on siderite but did not on hematite while a synergic effect of surface magnetization, i.e. the promotion of surface magnetization of hematite in the presence of siderite, appeared in the mineral mixtures or real iron ore containing hematite and siderite. The infrared spectra indicate that there is Fe₃O₄ generated on the surface of siderite in the process of self-magnetization; the measurement of VSM confirmed a significant change in magnetic hysteresis loops and increase of the saturated magnetization after hematite was magnetized by Fe²⁺ in the slurry; and SEM observed the adsorption of Fe₃O₄ species on the surface of hematite, which is generated originally from the siderite in an alkaline slurry, resulting in the synergic effect of siderite on hematite .

Abstract: A craft of sodium hydroxide roasting-aqueous leaching process is investigated for the treatment of a high arsenic pyrite cinders, a common by-product in vitriol industry. The pyrite cinders, containing 58.27% Fe, and 0.98% As, was conducted for the craft. The results demonstrated that iron concentrate with 58.87% Fe, 0.13% As and 87.40% of arsenic removal percentage was obtained under the optimal conditions (a roasting temperature of 1000°C, a roasting duration of 120 min and a mass ratio of sodium hydroxide to pyrite cinders of 8%).This craft can be used to utilize pyrite cinders and produce qualified concentrate as iron-bearing feed for steel industry, which will help to solve the pollution of pyrite cinders and extend raw material sourcing for Chinese steel industry.