MLA工艺矿物学自动分析服务系统

云南省化工研究院引进的MLA工艺矿物学自动分析系统是国内外目前在矿物物相、结构自动定性定量分析,矿物分选流程工艺矿物学分析、监控、优化方面较为先进的矿物学研究服务系统。     

浅谈工艺矿物学在矿物加工中的应用

矿物加工中,工艺矿物学的应用能够为矿物筛选提供更加全面和准确的资料,从而改进矿物加工质量,提高筛选效率。且工艺矿物学能够有效检验矿物成分,进而增强矿物加工参数的准确性。为此,本文着眼于工艺矿物学在矿物加工中的作用,就工艺矿物学在矿物加工中的应用问题进行了探究。     

湖南某铜矿的工艺矿物学研究

为了查明湖南某铜矿的工艺矿物学特性,对该矿石开展了较为完整的工艺矿物学研究,结果表明:该矿石中含铜0.75%;矿石中主要含铜矿物有孔雀石和赤铜矿,另有磁铁矿、钛铁矿、方铅矿等金属矿物,脉石矿物主要由石英、绢云母、滑石、白云石、钠闪石、长石等组成,为该资源的综合利用提供了重要的技术支撑。     

贵州某碳酸盐型磷块岩工艺矿物学研究

通过X射线衍射分析、采用化学分析、光学显微镜下分析以及扫描电镜下特征分析等方法,对贵州某碳酸盐型磷块岩进行了工艺矿物学研究,研究的主要内容有有用矿物含量、微量元素特征、元素赋存状态特征及矿物单体解离等工艺矿物学。矿石中主要脉石矿物为白云石,通过简单的酸解反应即可除去,从而得到富磷的矿物,为资源综合利用提供有利条件,使元素磷得到充分的利用。     

工艺矿物学提高磷精矿品位的可能性及途径

研究了云南某低镁风化胶磷矿的岩石类型、结构构造、矿物种类及含量、嵌布粒度特性及化学成份,测定了主要矿物的工艺特性参数,查明了矿物组成、主要矿物的嵌布特征以及磷元素的赋存状态,并对浮选精矿和尾矿进行工艺矿物学研究。阐明了影响选矿工艺的矿物学因素。对矿石性质、磷的工艺特性及影响磷回收效果的主要因素进行了研究。结合研究成果,探讨了提高云南某低镁风化胶磷矿精矿品位的可能性及途径。     

云南某风化状磷块岩工艺矿物学研究

对云南某风化状磷块岩进行了系统的工艺矿物学研究,利用偏光显微镜和MLA系统查明了矿样的主要有用矿物、主要结构构造、磨矿粒度分布特征及主要矿物的单体解离特征等,将为该类型矿石的选矿加工工艺的制定提供指导。     

《岩石矿物学杂志》征稿启事

正《岩石矿物学杂志》是由中国地质学会岩石学专业委员会、矿物学专业委员会、中国地质科学院地质研究所联合主櫒办的学术性期刊,属地质类全国中文核心期刊,主要报道内容包括:岩石学领域的专题性或区域性岩浆岩、变质岩、沉积櫒岩的岩类学、岩理学、实验岩石学、宇宙岩石学、工艺岩石学等方面的基础理论和应用研究成果;矿物学领域的描述矿物櫒学、理论矿物学、材料矿物学、应用矿物学、宝玉石矿物学、环境矿物学、矿物药学、矿相学、新矿物及矿物中包裹体等方面櫒櫒的研究成果;与岩石学、矿物学有关的边缘交叉学科中的构造岩石学、岩石大地构造学、岩石地球化学、同位素年代学、同櫒位素地球化学、岩石成矿学、环境地质学、煤岩学、储层地质学等方面的创造性和综合性研究成果;岩石和矿物鉴定的新     

《岩石矿物学杂志》征稿启事

正《岩石矿物学杂志》是由中国地质学会岩石学专业委员会、矿物学专业委员会、中国地质科学院地质研究所联合主办的学术性期刊,属地质类全国中文核心期刊,主要报道内容包括:岩石学领域的专题性或区域性岩浆岩、变质岩、沉积岩的岩类学、岩理学、实验岩石学、宇宙岩石学、工艺岩石学等方面的基础理论和应用研究成果;矿物学领域的描述矿物学、理论矿物学、材料矿物学、应用矿物学、宝玉石矿物学、环境矿物学、矿物药学、矿相学、新矿物及矿物中包裹体等方面的研究成果;与岩石学、矿物学有关的边缘交叉学科中的构造岩石学、岩石大地构造学、岩石地球化学、同位素年代学、同位素地球化学、岩石     

云南某碳酸盐型磷块岩矿工艺矿物学研究

对云南某碳酸盐型磷块岩矿进行了工艺矿物学研究,查明了矿石的矿物组成、结构构造、基本参数及主要矿物的特征。矿石中主要脉石矿物为白云石,通过单一反浮选脱除白云石即可获得合格磷精矿,有用矿物胶磷矿呈凝胶状、鲕状、假鲕状结构,嵌布粒度细,需要较大的磨矿细度才能使胶磷矿和脉石矿物解离。     

湘西地区低品位碳酸锰矿的工艺矿物学研究

通过X射线衍射、扫描电镜及矿物参数自动分析仪等测试技术和仪器对湘西地区低品位碳酸锰矿进行了工艺矿物学研究,结果表明,该锰矿含锰品位为9.93%,属于低品位锰矿石,主要锰矿物为菱锰矿,呈微细粒集合体纹层状分布于石英间隙,少量微晶菱锰矿呈豆荚状、团块状集合体分布于绢云母中。因此菱锰矿与石英和绢云母较难解离。     

浮选磷矿尾矿再选试验探索

云南某磷矿浮选尾矿主要矿物为胶磷矿,脉石矿物为石英-硅酸盐类矿物。对该浮选尾矿进行工艺矿物学研究和再磨再选试验,结果表明,可以获得磷精矿品位26.96%,回收率65.79%,尾矿磷品位4.72%的良好指标。     

瓷石的工艺矿物学特征与选矿研究

论述了瓷石的工艺矿物学持证，研究了瓷石的选矿工艺，并对江西宁村和上祝瓷石进行选矿实验取得了满意结果。     

黄铁矿浮选的抑制与解抑活化研究进展

黄铁矿浮选问题是金属矿、煤矿以及某些非金属矿等开发利用过程中通常需要面临的问题,其浮选的抑制、解抑活化以及影响其浮选行为的一些因素一直是矿物加工领域的研究热点。本文分析了矿物学因素、难免离子和伽伐尼电偶作用对黄铁矿的浮选行为的影响,着重从浮选药剂与矿物的作用机理方面综述了黄铁矿的抑制与解抑活化;黄铁矿与不同种类的抑制剂作用后通过生成亲水膜、阻止黄药氧化、占据黄铁矿表面捕收剂能作用的活性位点、生成络合物以及多糖、蛋白质等微生物细菌胞外分泌物的吸附等作用对黄铁矿产生抑制作用;高碱环境下常用酸和盐类活化剂对受抑黄铁矿表面的亲水膜溶解进行活化,实现黄铁矿的回收利用。分析认为目前对矿物内部和矿浆的复杂环境研究仍不到位,应通过现代分析测试手段和计算机技术加强研究;黄铁矿不仅仅作为一种矿物资源,黄铁矿等环境矿物在环保领域的研究应用对缓解经济发展与环境保护的矛盾起着至关重要的作用。     

Effects of coal blending on the reduction of PM10 during high-temperature combustion 2. A coalescence-fragmentation model

A coalescence-fragmentation model has been developed to predict the behaviors of coal mineral particles during the combustion of pulverized bituminous coals or coal blends. Based on the computer-controlled scanning electron microscope (CCSEM) characterization of coal minerals, the particle size distributions (PSDs) and mineral species of ash particles can be simulated. In particular, the interactions among excluded minerals (mainly referring to the excluded Ca-bearing-species and Fe-bearing-species) and included minerals are accounted for in this model. The PSDs and the mineral species of ash particles are derived from the coalescence and fragmentation of coal mineral particles. Based on this proposed model, both of the predicted PSDs and the mineral species of ash particles are in good agreement with their corresponding experimentally measured values. And the comparisons further demonstrate that the combined effects of coalescence of included minerals and fragmentation of excluded minerals have direct impacts on the ash-forming process. In addition, for the coals rich in excluded Ca- and/or Fe-bearing-species, the interactions among included minerals and excluded minerals are another important mechanism governing ash formation for high-rank coals.     

Quantitative X-ray powder diffraction analysis of clay minerals in Australian coals using Rietveld methods

The mineralogy of clay-rich mineral matter isolated from a range of Australian bituminous coals has been evaluated in quantitative terms from X-ray powder diffraction (XRD) patterns using a Rietveld-based data processing technique. The chemical composition of coal ash derived from this mineral matter has been calculated and compared to the directly determined composition of the ash prepared from the same coal samples. Although there are some minor differences due in part to uncertainty regarding the actual composition of several minerals, the compositions indicated by the two methods show a relatively high correlation, suggesting that the Rietveld technique provides mineralogical analyses that are consistent with independently determined chemical data. Comparison of the normalised clay mineral percentages from the Rietveld analysis to quantitative interpretations based on a peak intensities in glycolated and heat-treated oriented aggregates of the respective clay fractions also shows a high correlation, confirming mutual consistency of the two different mineralogical analysis methods. Such quantitative mineralogical data are significant to a range of coal exploration, mining and utilization activities, including seam correlation, material handling and ash and slag formation in combustion processes.     

O2/CO2燃烧对神华煤Ca和Fe交互反应影响

选用高Ca、高Fe含量的神华煤,在沉降炉系统中进行空气以及O₂/CO₂燃烧实验。利用X射线荧光探针(XRF)、X射线衍射仪(XRD)、先进计算机控制扫描电镜(CCSEM)分别对总灰元素、晶相组成以及主要矿物元素的共生特性进行深入表征。结果表明氧/燃料燃烧促进了Fe、Ca与其他矿物元素的交互反应,总灰中Fe在Fe-rich类矿物分布减少,而在铁铝硅酸盐(Fe-alsil),尤其是在Fe与Ca发生交互反应的Fe+Ca类矿物的分布增加,同时Ca也存在类似的分布规律。对总灰中Fe+Ca类矿物深入分析发现,氧/燃料燃烧条件下总灰中Fe+Ca类矿物结渣倾向更严重(Fe₂O₃/CaO摩尔比为0.5～3)。     

MLA在广东斑岩型锡石矿嵌布特征及赋存状态研究中的应用

利用矿物自动分析系统(MLA)和X射线荧光光谱仪、原子吸收分光光度计等对广东某斑岩型锡矿小于2 mm的原矿进行工艺矿物学研究，考察矿物组成、嵌布粒度、连生及包裹关系。结果表明，锡石主要呈细粒浸染状嵌布于脉石矿物中，嵌布粒度细微，最大粒度约为0.250 mm，最小为0.001 mm，主要集中在0.020?0.090 mm之间，单体解离度仅为9.98%，连生体主要与石英、黄玉连生。约93%的锡石(硬度6.5)被石英(硬度7)、黄玉(硬度8)包裹或与之连生，属难磨难选矿石，原矿伴有少量钼、铋、钨、铜等有价元素。选矿原则流程可确定为优先浮选回收硫化矿(钼、铋、铜、钨)，窄级颗粒分别(或依次)重选回收锡石。     

Role of mineral flotation technology in improving bitumen extraction from mined Athabasca oil sands: I. Flotation chemistry of water‐based oil sand extraction

The role of surface hydrophobicity in water‐based oil sand extraction is examined from the perspective of mineral flotation separation. Although anionic carboxylates (sulphonates) released from bitumen are helpful for charging bitumen and liberating bitumen from sand grains, their presence in oil sand slurries tends to make bitumen and bubbles less hydrophobic. In addition, solid hydrophobization under oil sand extraction conditions can occur through different mechanisms of carboxylate adsorption. It is the hydrophobized fine solids that present challenges for achieving a high bitumen recovery with a good froth quality, due to their competition with bitumen for attachment to bubbles. While chemisorption of carboxylates contributes to hydrophobization of heavy minerals present in oil sands, carboxylate adsorption activated by hydrolyzed metal cations alters silica and clays from hydrophilic to hydrophobic. Different adsorption mechanisms of calcium on silica, clays, and other minerals are analyzed to explain why fine solids of varying mineralogy in combination with calcium affect bitumen extraction differently. Metal ions that activate solid hydrophobization under oil sand extraction conditions are identified from dynamic attachment of solids from mature fine tailings (MFT) to bitumen. To mitigate the effect of fines on oil sand extraction, selective flocculation of fine solids is recognized as especially feasible for bitumen flotation recovery from oil sand middling streams. Future research in reducing or eliminating caustic addition, understanding the role of inorganic anions, and searching for feasible techniques for treating MFT based on different mineralogy and surface properties, are briefly discussed.

     

浅析宁夏中生代煤系粘土矿物与煤变质关系

在概述粘土矿物组合、电子显微形态和结晶度等矿物学特征的基础上,探讨了宁破地区中生代煤系粘土矿物与煤变质的关系。