Effect of Mn Dispersion on Gas Phase Ozone Decomposition at Room Temperature Using Natural Manganese Oxides

In this study, various analyses were performed to evaluate the ozone removal characteristics using natural manganese ore (NMO) at room temperature. NMO exists primarily in the form of MnO₂, and the specific forms of manganese oxide are formed as the calcination temperature increases. The activity tests, XRD, BET, and XPS analyses confirmed that the dispersion of manganese site exposed to the surface was a critical factor for ozone removal using NMO. To evaluate the actual application of NMO as a catalyst for ozone decomposition, NMO was also made as a form of monolith; as a result, the catalyst showed an excellent conversion rate (over 80%) even at space velocity 30,000 h^?1.     

快速直接还原法生产金属化球团工艺的探讨

研究开发了冷固结含碳铁矿球团的还原工艺，它与环形转底炉相结合，形成快速直接还原新工艺，生产金属此球团，具有一系列优点，如：设备简单，生产效率高、能耗低等等。     

The geology and mineralogy of a range of kaolins from the Santa Cruz and Chubut Provinces, Patagonia (Argentina)

In the Santa Cruz and Chubut provinces, Patagonia, Argentina, kaolin deposits were formed by “in situ” alteration of volcaniclastic rocks, such as the Bajo Grande, Chon Aike or Marifil Formations, or by erosion, transportation, and deposition of residual clays in small basins. This paper describes the genesis; geology; mineralogy; major, minor, and trace element geochemistry; grain size distribution; and specific surface area of natural and washed kaolins in an attempt to understand their behavior in the ceramic process. The sedimentary clays of the Baqueró Fm Lower Member, related to the Bajo Grande basement, are kaolinitic–smectitic, very fine-grained, and with a very high specific surface area. The clays related to the Chon Aike or Marifil Fms are kaolinitic, showing intermediate values of specific surface area and a coarser particle size distribution, associated with quite a fine-grained texture. The Baqueró Fm Upper Member received a considerable pyroclastic supply, fostering the development of a fine-grained clay in which kaolinite (± halloysite) with higher values of kaolinite crystal order prevailed. Primary kaolins – derived from weathering of pyroclastic sequences of Chon Aike and Marifil Fms – are coarse-grained, composed of kaolinite + quartz ± halloysite and exhibit a very low specific surface area. Alteration of mostly crystalline pyroclastics yielded ordered kaolinite and illite (+ halloysite) with a fine particle size distribution and intermediate values of specific surface area. Alteration of mainly vitreous pyroclastics produced halloysite (+ kaolinite) with a fine-grained texture and moderately high values of specific surface area. A supergene origin of primary kaolins is inferred on the basis of palaeoclimatic and geochemical evidence that corroborates stable isotopic data. The mineralogy, grain size, and textural characteristics of clays are controlled by parent rock composition (primary kaolins) or by provenance and proximity to source areas (sedimentary kaolins).     

山东界河金矿黄铁矿的成因矿物学与找矿矿物学

对界河金矿黄铁矿形态、成分、热电系数、X光及矿物学填图研究,得出{111}、{210}、{100}分别主要出现在矿体的上部、中部、下部,含{210}聚形晶高为富矿地段;矿体都包含于热电系数为-140～-160μV/℃区间,热电系数绝对值大于160μV/℃为富矿;7号矿体剥蚀较大,1,4号矿体剥蚀较小,现开采部位分别相当于矿体的下部和上部;热电系数填图确定了矿体的形态,并发现了新矿体。     

会东大梁子铅锌矿矿床成因探讨

会东大梁子铅锌矿床是我国少见的富矿床,探明其成因对今后找矿具有重要意义。本文通过对该矿床的特性分析,讨论了矿物的成因。     

利用"数据挖掘"技术解决矿山资源危机的可行性研究

阐述了在解决老矿山资源危机的找矿勘探、矿产经济研究、尾矿和废石的利用等方面新采取的对策，应用数据挖掘技术的可行性，并就数据挖掘技术在矿山中的应用提出了一些建议。     

歪头山铁矿财务信息化建设

财务信息系统是企业信息管理的子系统,是企业管理的核心。计算机及网络技术的发展为企业财务管理向高速化、信息化发展提供了技术上的支持。本文介绍了歪头山铁矿实施财务信息化建设的具体情况。     

葡萄牙Panasqueira钨矿地压活动分析与治理

介绍了葡萄牙Panasque ira钨矿房柱法采场地压现状,分析了空场中顶板和矿柱冒落破坏的原因,提出该矿采取防范地压的措施:对面积较大的采场,可在采场中预留宽度为11 m的隔离矿柱,以阻隔已采完但未冒落的空场,并尽可能使隔离矿柱与大断层平行,同时采取人工强制放顶与减小爆破药量等辅助措施,从而降低大面积冒落的危害。     

探讨配矿数学模型提高铁精矿品位

运用多元回归务析法，分析铁矿石采出品位、碎矿抛岩品位和铁精矿品位三者之间的相互关系，并以此为依据，确立配矿数学模型，提出配矿方案。     

我国南方某金矿体矿石浸出试验研究

对我国南方某金矿体矿石进行了氰化物和硫脲室内浸出可行性研究，初步试验结果表明，可行性方案为氰化浸出工艺，并研究了氰化浸出工艺浸出剂浓度、氧化剂浓度、液固比等对浸出效果影响，金浸出率超过90％，获得了浸出的合适参数和工艺条件，可为下步现场试验提供参考依据。