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Utilization of alkali-activated copper slag as binder in concrete

《结构与土木工程前沿（英文）》 2021年第15卷第3期页码 773-780 doi: 10.1007/s11709-021-0722-z

摘要： This study was focused on developing concrete using alkali-activated copper slag (AACS) as a binder. The properties of alkali-activated copper slag concrete (AACSC) were compared with portland cement concrete (PCC). Different AACSC mixes were prepared with varying Na₂O dosage (6% and 8% of the binder by weight) and curing methods. Hydration products in AACSC were retrieved using Fourier-transform infrared spectroscopy (FTIR) and X-ray powder diffraction (XRD) techniques. The test results indicate that the workability of AACSC was lesser than that of PCC. The AACSC mix with 6% Na₂O dosage has exhibited similar mechanical properties as that of PCC. The mechanical properties of AACSC were higher than PCC when 8% of Na₂O dosage was used. Heat curing was effective to upgrade the strength properties of AACSC at an early age of curing, but at a later age mechanical properties of ambient cured and heat-cured AACSC were comparable. The hydration products of AACSC were not identified in XRD patterns, whereas, in FTIR spectra of AACSC some alkali-activated reaction products were reflected. The AACSC mixes were found to be more sustainable than PCC. It has been concluded that AACSC can be produced similarly to that of PCC and ambient curing is sufficient.

关键词： binder concrete mechanical properties mineralogy workability

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Effect of oil shale semi-coke on deposit mineralogy and morphology in the flue path of a CFB burning

Zhuo LIU, Jianbo LI, Mingming ZHU, Xiaofeng LU, Zhezi ZHANG, Dongke ZHANG

《能源前沿（英文）》 2021年第15卷第1期页码 26-37 doi: 10.1007/s11708-020-0668-1

摘要： The effect of oil shale semi-coke (SC) on the mineralogy and morphology of the ash deposited on probes situated in the flue path of a circulating fluidized bed (CFB) which burns Zhundong lignite (ZD) was investigated. 10 wt% or 20 wt% SC was added to ZD, which were then combusted in the CFB furnace at 950°C. Two probes with vertical and horizontal orientations were installed in the flue duct to simulate ash deposition. Both windward and leeward ash deposits on probes (P W, P L, P W and P L) were analyzed by using a scanning electron microscopy with energy dispersive X-ray (SEM-EDX), X-ray diffraction (XRD), an inductively coupled plasma optical emission spectrometry ICP-OES, and a particle size analyzer. When ZD was burned alone, the P W deposit was comprised of agglomerates (<30 m) enriched in CaSO and Na SiO , incurring significant sintering. The P L and P W deposits, however, were of both discrete and agglomerated particles in similar mineral phases but with coarser sizes. The P L deposit was mainly fine ash particles where Na SiO and Na SO were absent. As SC was added, the agglomerates in both P W and P L decreased. Moreover, SiO and Ca/Na aluminosilicates dominated the mineral phases whereas Na SiO and Na SO disappeared, showing a decrease in deposit stickiness. Likewise, the P W deposit was found less spread on the probe, decreasing its deposition propensity. Na-bearing minerals turned into (Na, K)(Si Al)O and (Ca, Na)(Si, Al) O in the P W deposit. Moreover, Na in the deposits decreased from 32 mg/g to less than 15 mg/g as SC presented. The addition of SC would therefore help alleviate the propensity of ash deposition in the flue path in the CFB combustion of ZD.

关键词： ash deposition circulating fluidized bed (CFB) mineral transformation oil shale semi-coke (SC) Zhundong lignite (ZD)

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The effect of pH, solid content, water chemistry and ore mineralogy on the galvanic interactions between

Asghar Azizi, Seid Ziaoddin Shafaei, Mohammad Noaparast, Mohammad Karamoozian

《化学科学与工程前沿（英文）》 2013年第7卷第4期页码 464-471 doi: 10.1007/s11705-013-1356-z

摘要： The role of pH, solid content, water chemistry and ore mineralogy on the galvanic interactions between chalcopyrite and pyrite and low alloy steel balls were investigated in the grinding of Sarcheshmeh porphyry copper sulfide ore. All these factors strongly affect the galvanic current between the minerals and the steel during the grinding process. The galvanic current density decreased as the solution pH and percent solids increased. In addition, changing the water in the ball mill from tap to distilled water reduced the galvanic current between the minerals and the balls. Potentiodynamic polarization curves showed that pyrite and chalcopyrite demonstrated typical active-passive-transpassive anodic behavior in the grinding of copper ore. However, the nature of their transitions from the active to the passive state differed. This behavior was not seen in the grinding of pure minerals. In addition, an EDTA extraction technique was employed to quantify the amount of oxidized iron in the mill discharge. The amount of extractable iron was influenced by the same experimental factors and in the same way as the galvanic current.

关键词： steel ball galvanic interaction pyrite chalcopyrite polarization curves

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数据驱动型研究方法在矿物学领域里的新发现——矿物数据资源、数据分析和可视化的最新研究进展 Review

Robert M. Hazen, Robert T. Downs, Ahmed Eleish, Peter Fox, Olivier C. Gagné, Joshua J. Golden, Edward S. Grew, Daniel R. Hummer, Grethe Hystad, Sergey V. Krivovichev, Congrui Li, Chao Liu, Xiaogang Ma, Shaunna M. Morrison, Feifei Pan, Alexander J. Pires, Anirudh Prabhu, Jolyon Ralph, Simone E. Runyon, Hao Zhong

《工程（英文）》 2019年第5卷第3期页码 397-405 doi: 10.1016/j.eng.2019.03.006

摘要：

随着矿物种类多样性、矿物（时空）分布特征和矿物性质等领域海量数据的快速增长，矿物学迎来了数据驱动型研究发现的新纪元。当前，最全面的国际性矿物数据库是IMA 数据库和mindat.org 数据库，其中，IMA 数据库包含了超过5300 种被国际矿物学协会（International Mineralogical Association，IMA）批准认可的矿物及其属性信息。此外，mindat.org 数据库包含了超过100 万种矿物种类及其产地信息，这些矿物来自于世界各地，有登记在册的产地来源就超过了30 万个。采用各种现代化分析方法对这些海量地学数据进行分析解读和可视化处理，进一步增进了对地球圈和生物圈协同演化过程的理解认识，这些分析方法包括chord 图、cluster 图、Klee 图、skyline 图，以及各式各样的网络分析方法。新型数据驱动型分析策略包括矿物演化分析、矿物生态学分析和矿物网络分析，这些分析策略能够系统性地综合考虑矿物的时空分布特征及其多样性。这些分析策略正在增进对矿物共生现象的深入认识，并且首次推动了对“地球上存在但尚未被发现和记录在册矿物”的预测。

关键词：矿物演化矿物生态学 Skyline图网络分析聚类分析 Chord图 Klee图