Results 71 to 80 of about 1,115 (180)

Depression of pyrrhotite superstructures in copper flotation: A synchrotron X-ray powder diffraction and DFT study

open access: yesInternational Journal of Mining Science and Technology
Pyrrhotite naturally occurs in various superstructures including magnetic (4C) and non-magnetic (5C, 6C) types, each with distinct physicochemical properties and flotation behaviors.
Alireza Rezvani   +5 more
doaj   +1 more source

Studies on Pyrrhotite. I : Combustibility of Pyrrhotite

open access: yesStudies on Pyrrhotite. I : Combustibility of Pyrrhotite
application/pdf In order to obtain a precise understanding of the combustibility of pyrrhotite, the roasting reaction rates and the relations between the roasting reactions and the roasting temperatures were investigated. It was found that pyrrhotite had a fairly low combustibility resulting from the low ignitibility, the slow reaction rate of oxide ...
openaire  

Recovery Process of Copper from a Sulfur Concentrate in Shandong Province

open access: yesKuangchan zonghe liyong
[Objective] A sulfur concentrate in Shandong contained 0.47% copper. In order to improve the utilization rate of mineral resources, [Method] technological mineralogy research and copper recovery process tests were conducted on the sulfur concentrate ...
Enming HUANG   +6 more
doaj   +1 more source

Studies on Pyrrhotite. III : Sintering of Pyrrhotite Cinder

open access: yesStudies on Pyrrhotite. III : Sintering of Pyrrhotite Cinder
application/pdf The progress of sintering of pyrrhotite cinder during the process of roasting was studied by measuring the resistance of cinder to the penetration of a slender rod. The results showed that pyrrhotite cinder, in general, began to sinter at 250-350℃ with a very high resistance to the penetration of a rod.
openaire  

Effects of the expansion mechanisms on the pyrrhotite-induced deterioration of concrete foundations

open access: yesCase Studies in Construction Materials
Using pyrrhotite containing aggregates in concrete foundations can lead to premature deterioration visibly identifiable by extensive map cracking, expansion and deformation of the concrete foundation.
Rui Zhong   +4 more
doaj   +1 more source

Identifying Framboidal Pyrrhotite: A Proxy for Hydrothermal Alteration of Organic‐Rich Sediments

open access: yesGeophysical Research Letters
Framboidal pyrrhotite, in sharp contrast to framboidal pyrite, has been rarely reported, and its formation remains poorly understood. Here we report its clear identification in a shale‐gas well core and explore its potential as a proxy for diagenesis or ...
Y. Wang   +7 more
doaj   +1 more source

(184)Pyrrhotite Roasting. I. Experiments on Pyrrhotite Roasting

open access: yesThe Journal of the Society of Chemical Industry, Japan, 1950
Sakae Yagi, Kazumi Takagi
openaire   +2 more sources

Pyrrhotite-driven early-stage terrestrial alteration in Ryugu grains

open access: yesNature Communications
Samples returned from the carbonaceous asteroid Ryugu preserve a rare record of water- and organic-rich materials from the early Solar System, but this record can be modified rapidly after arrival on Earth.
Masaaki Miyahara   +8 more
doaj   +1 more source

Vacancy-plane-mediated exfoliation of sub-monolayer 2D pyrrhotite. [PDF]

open access: yesNanoscale Adv, 2023
Lee JJ   +7 more
europepmc   +1 more source

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