scholarly journals Mineralogical and Chemical Characteristics of Slags from the Pyrometallurgical Extraction of Zinc and Lead

Minerals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 371
Author(s):  
Katarzyna Nowinska
Keyword(s):  
Secondary Mineral ◽  
Lead Refining ◽  
Potential Source ◽  
Metals Recovery ◽  
End Products ◽  
Primary Mineral ◽  
Mineral Components ◽  
Lead Bullion ◽  
Pyrometallurgical Processing ◽  
Mineral Constituents

The slags derived from the fire refining of lead bullion, differ distinctly in the mineral composition, which results from the fact that these slags are end products of a series of chemical reactions (of both reduction and oxidation). The most common phases included in the refining slags are sulphates and hydrated sulphates (anglesite, gypsum, ktenasite and namuvite), oxides and hydroxides (wustite and goethite), nitrates (gerhardtite) and silicates (kirschsteinite and willemite). The other phases are sulphides and hydrated sulphides (sphalerite and tochilinite), metals (metallic Pb) and glass. Among the mineral components of these slags can be distinguished—primary mineral constituents, phase constituents formed in the ISP process and lead refining, secondary mineral constituents, formed in the landfill. The slags contain, in chemical terms, mainly FeO, CuO and SO3, PbO, in smaller contents SiO2, Al2O3 and CaO, TiO2, MnO, MgO, K2O, P2O5. The mineralogical and chemical composition indicate that slags may be a potential source of metals recovery and pyrometallurgical processing of these wastes seems to be highly rational.

scholarly journals Comparison of the mineralogy and microstructure of EAF stainless steel slags with reference to the cooling treatment

2017 ◽  
Vol 53 (1) ◽  
pp. 19-29 ◽  
Author(s):  
M. Loncnar ◽  
A. Mladenovic ◽  
M. Zupancic ◽  
P. Bukovec
Keyword(s):  
Stainless Steel ◽  
Mineralogical Composition ◽  
Water Cooling ◽  
Secondary Mineral ◽  
Cooling Path ◽  
High Basicity ◽  
Treated Steel ◽  
Mineral Phases ◽  
Primary Mineral

TIn the present study the differences in the mineralogical composition and microstructure of various types of EAF stainless steel (EAF S) slag with regard to the cooling path, the operation practice in an EAF (electric arc furnace) and environmental ageing reactions were evaluated. It was shown that the mineralogy of the investigated EAF S slags varied from one slag to another, depending on the quality of the produced stainless steel. The production process of the treated steel also has a strong influence on the mineralogy of the slags. The conditions during water cooling were not sufficient to prevent the crystallization of primary mineral phases, which occurs predominantly in air-cooled EAF S slags, probably due to the high basicity of the investigated slags. However, the water cooling of hot slag leads to the absence of ?-CaSiO4 and the formation of secondary mineral phases predominantly calcite, portlandite, ettringite, calcium aluminate hydrate and calcium silicate hydrate. It has been shown that during the environmental ageing test (down-flow column test) secondary mineral phases were formed, which were the same as those formed during the water cooling of slags.

scholarly journals Abnormal open-hole natural gamma ray (GR) log in Baikouquan Formation of Xiazijie Fan-delta, Mahu Depression, Junggar Basin, China

2018 ◽  
Vol 10 (1) ◽  
pp. 844-854 ◽  
Author(s):  
Rui Yuan ◽  
Rui Zhu ◽  
Jianhua Qu ◽  
Xincai You ◽  
Jun Wu ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Junggar Basin ◽  
Fine Grained ◽  
Fan Delta ◽  
Natural Gamma ◽  
Primary Mineral ◽  
Open Hole ◽  
Mineral Components ◽  
Components Analysis ◽  
Conventional Logs

Abstract Based on large amounts of cores, open-hole conventional logs and mineral components analysis, abnormal natural gamma ray (GR) log showing high values in conglomerates and low values in fine-grained sediments, are described and explained in Baikouquan Formation of Xiazijie Fan-delta, Mahu Depression, Junggar Basin. After observing cores, normalizing the GR log and correcting depth errors between both, the GR log values of individual grain-sized lithology are extracted and counted. When grain-size decreases, the average GR values of different sized grains increase generally. The GR values of conglomerates are mostly between 50 and 80 API, while the values of fine-grains are mainly between 70 and 100 API. However, abnormal GR log features exist in the cores and wells of Baikouquan Formation prevalently. A great deal of high radioactive intermediate-acid volcanic minerals, such as volcanic tuff, felsite, andesite, granite, rhyolite, et al., distribute widely in the conglomerates, which results in abnormal high GR values in conglomeratic intervals. Low radioactive quartz components exit widely in high percentage in mudstones, which is the primary mineral explanation for the abnormal low GR values in reddish-brown siltstones and sandstones intervals.

Further data on the occurrence of pectolite in kimberlite

1983 ◽  
Vol 47 (342) ◽  
pp. 75-78 ◽  
Author(s):  
Barbara H. Scott Smith ◽  
E. Michael Skinner ◽  
C. Roger Clement
Keyword(s):  
South Africa ◽  
Secondary Mineral ◽  
Bearing Material ◽  
X Ray ◽  
Primary Mineral ◽  
De Beers ◽  
Ray Methods

AbstractPectolite has been identified, using petrographic, chemical, and X-ray methods, in kimberlites from the De Beers and Dutoitspan Mines, Kimberley, South Africa and the Letseng-La-Terai Mine, Lesotho. It occurs as radiating aggregates of fibrous or acicular crystals not only in the groundmass of certain kimberlites but also in altered xenoliths included within kimberlite. The occurrence of Na-rich minerals in kimberlite is unusual. It is suggested that it can occur as an apparently primary mineral resulting from the incorporation and assimilation of foreign Na-bearing material prior to final consolidation, and/or as a secondary mineral after metasomatic introduction of Na-bearing fluids.

A process engineering approach to remedy an environmental problem of fugitive lead emissions during lead refining

1995 ◽  
Vol 10 (3) ◽  
pp. 538-544
Author(s):  
Liming Wang ◽  
Arthur E. Morris
Keyword(s):  
Blast Furnace ◽  
Environmental Problem ◽  
Fugitive Emissions ◽  
Lead Blast Furnace ◽  
Lead Refining ◽  
New Process ◽  
High Vapor ◽  
Lead Emissions ◽  
Lead Bullion ◽  
Lead Blast

The refining of lead blast furnace bullion involves the transfer and handling of hot impure lead bullion. Fugitive emissions of lead-containing fumes create a plant hygiene problem. The cause of the emissions is the high vapor pressure of lead and its compounds when lead blast furnace bullion is transferred in an open ladle at ∼1000 °C from the blast furnace and poured into the drossing kettle, and later during the manual skimming of powdery dross. A laboratory study was conducted on a new concept for lead refining that eliminates contact between hot lead and the cnvironment, and thus abates fugitive lead emissions. The new process takes place in two steps: controlled solidification of bullion as it flows from the blast furnace, followed by remelting in a closed centrifuge to separate lead and dross. Refined lead was produced with <0.05% copper and <0.01% of all other impurities. Suggestions are outlined for implementing the process.

scholarly journals Petrographical, geochemical characteristics and ironmineralization of mafic massif at Tan Hoa area of Tan Chau, Tay Ninh

2015 ◽  
Vol 18 (4) ◽  
pp. 67-83
Author(s):  
Cong The Nguyen ◽  
Hoang Kim Nguyen
Keyword(s):  
Trace Elements ◽  
Continental Margin ◽  
Spectroscopic Analysis ◽  
Active Continental Margin ◽  
Geochemical Characteristics ◽  
Primitive Mantle ◽  
Secondary Mineral ◽  
Accessory Minerals ◽  
Mineral Components

The mafic massif at Tan Hoa area, Tan Chau, Tay Ninh (Hill 95) was detected in 1986 and was classified as Tay Ninh complex (K1tn, Nguyen Ngoc Hoa et al, 1995). Petrographical composition of this complex was clarified through the bores in 2013. It included gabbrodiorite, gabbronorite, gabbro, gabbropyroxenite and pyroxenite. The main mineral components were plagioclase, clinopyroxene, orthopyroxene and green hornblende. The secondary mineral was biotite. The accessory minerals are apatite, sphene, magnetite, pyrrhotite. Tay Ninh complex was in high content of titanium, rich in elements of Fe, Ti, V but low content of Rb, Sr, Y, Cs, Ba, Sm, Eu, Nd. The rare and trace elements standardized with primitive mantle and chondrite showed that their origin was from the deep, clear mantle and classified in rift on active continental margin pattern. Tay Ninh complex was characterized by its high anomalies in geophysics. The results of chemical and spectroscopic analysis, grinding and ore selection offered prospect of iron and titanium mineralization for complex.

Fine-Grained Concretes on Non-Clinker Binders with Highly Disperse Mineral Components

2018 ◽  
Vol 931 ◽  
pp. 552-557
Author(s):  
Dena K.S. Bataev ◽  
Sayd Al'vi Yu. Murtazayev ◽  
Madina Sh. Salamanova
Keyword(s):  
Power Plants ◽  
Energy Intensity ◽  
Thermal Power ◽  
Mineral Resources ◽  
Economic Indicators ◽  
Thermal Power Plants ◽  
Secondary Mineral ◽  
Fine Grained ◽  
Mineral Components

World and domestic experience in the development of various compositions and technologies for composite and mixed binders (including cementless ones) and concretes is reduced to the use of components based on ashes of thermal power plants and other secondary mineral resources. But their qualitative, ecological and economic indicators, as well as the energy intensity of production, do not meet modern requirements.

How SIMS microscopy can be used in medicine

1992 ◽  
Vol 50 (2) ◽  
pp. 1602-1603
Author(s):  
Philippe Fragu
Keyword(s):  
Mass Spectrometry ◽  
Biomedical Applications ◽  
Secondary Ion Mass Spectrometry ◽  
Chemical Elements ◽  
Biological Applications ◽  
The Past ◽  
Potential Source ◽  
Secondary Ion ◽  
Chemical Integrity ◽  
Scientific Endeavour

The identification, localization and quantification of intracellular chemical elements is an area of scientific endeavour which has not ceased to develop over the past 30 years. Secondary Ion Mass Spectrometry (SIMS) microscopy is widely used for elemental localization problems in geochemistry, metallurgy and electronics. Although the first commercial instruments were available in 1968, biological applications have been gradual as investigators have systematically examined the potential source of artefacts inherent in the method and sought to develop strategies for the analysis of soft biological material with a lateral resolution equivalent to that of the light microscope. In 1992, the prospects offered by this technique are even more encouraging as prototypes of new ion probes appear capable of achieving the ultimate goal, namely the quantitative analysis of micron and submicron regions. The purpose of this review is to underline the requirements for biomedical applications of SIMS microscopy.Sample preparation methodology should preserve both the structural and the chemical integrity of the tissue.

Sign in / Sign up

Export Citation Format

Share Document