in this work, a bench-scale process was developed using mineral-processing methods to recover iron from a placer deposit located in bardaskan, khorasan-e-razavi, iran. the mineralogical studies were performed by x-ray diffraction (xrd), x-ray fluorescence (xrf), electron probe micro-analyzer (epma), and an optical microscope. these studies indicated that titanomagnetite, magnetite, and hematite...

In this work, a bench-scale process was developed using mineral-processing methods to recover iron from a placer deposit located in Bardaskan, Khorasan-e-Razavi, Iran. The mineralogical studies were performed by X-ray Diffraction (XRD), X-ray Fluorescence (XRF), Electron Probe Micro-Analyzer (EPMA), and an optical microscope. These studies indicated that titanomagnetite, magnetite, and hematite...

This study describes the application of an empirical method to estimate the energy consumption in laboratory of the primary grinding of nickel ore with a specific mineralogical texture. This method developed by Donda was previously used in iron ore from the Iron Quadrangle (Minas Gerais, Brasil) with the same purpose. Through the grinding test, performed under standard conditions and based on t...

The perspective of the article is to explore kraft cooking at the limits of delignification, i.e. what degree of delignification is needed to obtain fibre liberation and what is the maximum degree of delignification possible in the kraft pulping stage. The reasons for the quite narrow boundaries for sufficient and maximum delignification are explained, and the differences between the behaviour ...

Mineral liberation is an important variable to be considered in the iron ore geometallurgical studies, especially since it provides information leading understanding of ore’s behaviour beneficiation process, mainly when harder ores are concerned. Nowadays, professionals and researchers mineral industry have been using complementary techniques for mineralogical characterization. In this way, Lib...

1 Fragment Re-Allocation Strategy Based on Hypergraph for NoSQL Database Systems; Zhikun Chen, Unit 91655, People’s Liberation Army, Beijing, China Shuqiang Yang, Department of Computer Science, National University of Defense Technology, Changsha, China Yunfei Shang, Unit 91655, People’s Liberation Army, Beijing, China Yong Liu, Unit 91655, People’s Liberation Army, Beijing, China Feng Wang, Un...

Accumulation of granules in the juxtaglomerular cells occurred in rats which were maintained for 5 to 6 weeks on a diet low in sodium, chloride. Cytological evidence suggests that this was probably a storage phase of secretion following a decrease in the rate of liberation of the granules. Administration of DCA (desoxycorticosterone acetate) to salt-deficient rats did not alter this appearance ...

Subjects (A' = 970) representing five stages of smoking cessation (precontemplation, contemplation, action, maintenance, and relapse) were given a 65-item test measuring 10 basic processes of change. Subjects recorded the last time they quit smoking, their current use, the frequency of occurrence, and the degree of item helpfulness. A 40-item questionnaire provided highly reliable measures of 1...