نتایج جستجو برای: ore treatment

تعداد نتایج: 1404160  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تهران - دانشکده فنی 1380

چکیده ندارد.

Journal: :Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science 2021

Abstract Magnetite-based iron ore usually shows a high sticking tendency and poor reducibility in the fluidized bed because of its dense structure. To enhance fluidization reduction behaviors magnetite-based during hydrogen-induced reduction, effect prior oxidation treatment is investigated. The results show that untreated cannot be successfully tested temperature range between 600 °C 800 °C. A...

2007
Ziming Li Min Wu M. Wu

We summarize some recent results on partial linear functional systems. By associating a finite-dimensional linear functional system to a Laurent-Ore module, Picard-Vessiot extensions are generalized from linear ordinary differential (difference) equations to finite-dimensional linear functional systems. A generalized Beke’s method is also presented for factoring Laurent-Ore modules and it will ...

2016
Benjamin Maloney David Pask Iain Raeburn

We consider a free action of an Ore semigroup on a higher-rank graph, and the induced action by endomorphisms of the C ∗-algebra of the graph. We show that the crossed product by this action is stably isomorphic to the C ∗-algebra of a quotient graph. Our main tool is Laca’s dilation theory for endomorphic actions of Ore semigroups on C ∗-algebras, which embeds such an action in an automorphic ...

2012
Nicola Ferro Gianmaria Silvello

Currently, archival practice is moving towards the definition of complex relationships between the resources of interest as well as the constitution of compound digital objects. To this end archives can take advantage of using the Open Archives Initiative Object Reuse and Exchange (OAI-ORE) providing additional and flexible visualizations of archival resources. In this paper we define a formal ...

2003
PETER TEICHNER

We prove the following result on the universal localization of a ring R at an ideal I: If the universal localization is flat as an R-module, then R satisfies the Ore condition with respect to the multiplicative set of elements that become invertible modulo I. It is well known that for domains the converse of this result holds, and hence we have found in this case a new characterization of the O...

2004
Daniel R. Parisi Miguel A. Laborde

In this work, the shaft furnace reactor of the MIDREX® process is simulated. This is a counter current gas-solid reactor, which transforms iron ore pellets into sponge iron. Simultaneous mass and energy balance along the reactor leads to a set of ordinary differential equation with two points boundary conditions. The iron ore reduction kinetics was modelated with the unreacted shrinking core mo...

2007
JUN ZHANG JAMES J. ZHANG

Abstract. We construct several families of Artin-Schelter regular algebras of global dimension four using double Ore extension and then prove that all these algebras are strongly noetherian, Auslander regular, Koszul and CohenMacaulay domains. Many regular algebras constructed in the paper are new and are not isomorphic to either a normal extension or an Ore extension of an Artin-Schelter regul...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2007
esmaeil jorjani amir hossein bagherieh bahram rezai

different samples have been prepared from different products in chadormalu iron ore concentrator plant: low intensity magnetite separators concentrate (magnetite concentrate), reverse flotation tail (final hematite concentrate), flotation concentrate (apatite concentrate), final tail (l.i.m.s. tail + reverse flotation concentrate+ apatite flotation tail). the samples were used for rare earth el...

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