Advanced Materials Research Vol. 1094

Abstract: Iron ore minerals are mainly silicate-type iron minerals in raw ore, and its distribution rate was 51.93%; followed by magnetic iron, and its distribution rate was 36.81%; content and distribution rate of other minerals was very low; element grade of iron, phosphorus, sulfur, silica were 11.90%, 0.043%, 0.013% and 45.23%, the main gangue were silica and calcium oxide, recyclable iron minerals mainly is magnetic iron mineral. Due to the grade of iron of raw ore and the amounts of optional magnetite was relatively little, in order to investigate the optional of low-grade ore, weak magnetic separation test and weak magnetic separation tailings-strong magnetic separation test were put into effect.

Abstract: The progress of adsorption capacity-enhancing modified manganese mineral, as well as the optimal conditions on which the adsorption of modified natural manganese mineral is conducted, are discussed and summarized in this paper. Moreover, the optimal parameters of the adsorption of Cu2+, Ni2+, and As (V) by using natural manganese mineral are respectively presented and the adsorption capacity is compared.

Abstract: Based on field observation, analogy simulation and theoretical analysis, the abutment pressure distribution law of fully-mechanized sublevel caving face with extra-thickness was studied. The results showed that: Different instability type of the structure ‘Combined cantilever beam-articulated rock beam’ in fully-mechanized sublevel caving roof led to cyclical changes of abutment pressure; with an invariable coal seam thickness and increasing cutting height, abutment pressure peak value tended to stabilize after reaching the maximum, but as the working face advancing its location transferred to the front of coal wall working face and the influence region of abutment pressure increased; with an invariable cutting height and increasing once mining thickness, abutment pressure peak value decreased, and the distance between peak point and coal wall and the influence region increased. The results of the study would have some guiding role in extra-thickness fully mechanized mining’s safety and efficiency.

Abstract: Using numerical simulation method,fully mechanized top coal’s caving property of Tang gong ta coal mine was studied.The results show at primary mining period of fully mechanized working face, there were stress concentration regions at the front and rear of coal wall,but it was not distinct in the front and top coal’s caving property was not ideal.When it advanced to 84m of the working face,there would be obvious peak stress at the front and rear of coal wall. It accelerated top coal’s caving.When it advanced to 140m of the working face,top coal was caved with coal mining.Finally it was proved on the scene. The results of the study in fully mechanized mining’s safety and efficiency has some guiding role.

Abstract: In this research, a fine disseminated gold ore in Yunnan, After four ore exploration tests of chemical pretreatment, get a reasonable oxidation-leaching process that: W-1 (60 kg/t) and M-3 (45 kg/t) used in conjunction with inflated amount of 0.5 m3/h, under the condition of 75°C, stirring pretreated for 24 h, the ore sample after pretreatment was filtered to take a certain amount ,at the condition of normal temperature and pressure, NH₄SCN 0.6 mol/L, KMnO₄ 10 g/L, slurry solid ratio of pulp is 4:1, stirring time is 5 h, pH value is 3. Under these conditions, the gold leaching rate up to 82.26%.

Abstract: This is an introduction to brief application of blowout preventers and accessory equipment. Fluid (either liquid or gas) erupts from the well, usually with great force, and often ignites into a roaring inferno, especially if the fluid is gas. The trouble arises when the pressure in the formation is higher than that in the well. The pressure in the well is maintained by the type and amount of drilling fluid being circulated through it. Blowout preventers(BOPs), in conjunction with other equipment and techniques, are used to close the well in and allow the crew to control a kick before it becomes a blowout.

Abstract: This paper used the methods of hydrochemical data logging, in-situ titrating , collecting the Source spring samples and the atmospheric samples in the water, by analysis their geochemical characteristics, to distinguish the source of sediment at Huanglong valley in Sichuan. The research shows the gas in the Haunglong Spring water is mainly from deep earth, which contains the inner earth information, instead of atmospheric or biogenic origin. Meanwhile, the research also shows the travertine deposited samples in the deep groove of earth contain a lot of information about the tectonic movements such as earthquakes , volcano activities and so on.

Abstract: The top slag reforming in RH refining process was studied in this paper to decrease inclusion and improve the deep drawing property of Ultra-low carbon cold-rolled steel. Different experiment schemes of top slag reforming were conducted and the result show that, when Al40 was added on the surface of the slag after the ladle reach station uniformly, the size of inclusions was decreased and the quantity of large-volume inclusions was obviously decreased, and the top slag reforming will not have big impact on decarbonization in the RH refining process.

Abstract: At present the development of Daqing Oilfield has entered the water pick-up period, and the polymer separate injection technology for the injection well is urgent needed. However, the difficulty of selecting well and lever for the separate injection of the injection well is relatively large due to the complexity of the Class II reservoir of geological conditions. So for The limits of technology of the geological features, the limits of technology injection of stratified polymer injection for the Class II reservoir provides a scientific basis for the development of oil fields.In this paper, taking Daqing Oilfield Sabei Development Zone as example, establish the mathematical model of polymer flooding. Determine the well and layer selection principles of layered polymer injection wells in the ClassIIreservoir timing. According to the current development situation, give the decrease in water content and the improvement value in recovery under a given measure.Through this paper, we have got production effect of layered polymer injection in the Class II reservoir of Sabei area and given quantified layered polymer injection technology limits.

Abstract: During mining activities, a large amount of wastes in the form of mine tailings were discharged, leading to a global problem in soil and water contamination. Phytoremediation was considered to be a potential method for remediation of mine wastes as vegetation can promote remediation for sustainable development of mine waste sites. Recently, studies were conducted to utilize microorganisms such as plant growth-promoting bacteria, or filamentous fungi to facilitate phytoremediation by increasing the plant biomass production, bioavailability of heavy metals (HMs), enhancing the plant uptake of HMs or reduce toxicity of HMs to plants. Some species of microorganisms can be beneficial to phytoremediation in the mine tailings contaminated with HMs.