ABSTRACT:Iron ore is the main mineral resources to support China's national economy, and open-pit mining is the main way. Chemical analysis has its disadvantages in terms of the determination of iron-ore type, such as slow speed and high cost. Therefore this study has put forward a method to determine iron-ore type through field spectrum analysis. First various types of iron-ore samples were co...

A flotation pre-treatment study for the separation of enargite (Cu3AsS4) from chalcopyrite (CuFeS2) ores of different origins was investigated in this work. The copper ore bearing enargite mineral contained 5.87mass% As and 16.50mass% Cu while the chalcopyrite bearing ore contained 0.32mass% As and 21.63mass% Cu. The two ore samples were mixed at 7 : 3 (enargite : chalcopyrite) by weight ratio ...

For a non-commutative domain R and a multiplicatively closed set S the (left) Ore localization of R at S exists if and only if S satisfies the (left) Ore property. Since the concept has been introduced by Ore back in the 1930’s, Ore localizations have been widely used in theory and in applications. We investigate the arithmetics of the localized ring SR from both theoretical and practical point...

Clinical, hemodynamic, angiographic, and echocardiographic as well as operative findings of a 19 years old girl are presented who had the unique combination of severe pulmonary valvular and infundibular stenosis with Ebstein's anomaly of the tricuspid valve. Pulmonary stenosis was relieved by infundibular resection and valvotomy. The atrial septal defect was closed with plication of atrialized ...

The Christmas copper mine is in the Banner mining district, Gila County, Arizona. It is 8 miles north of Winkelman and 22 miles south of Globe. The mine was opened in 1905; to the end of 1943 it had produced about 55,340,000 pounds of copper. In 1946 it was operated under lease. The ore is high-lime fluxing ore, required by the smelter at Hayden. The ore produced during 1942 averaged 2.16 perce...

This research describes an advanced workflow of object-based geochemical graph learning approach, termed OGE, which includes five key steps: (1) conduct the mean removal operation on multi-elemental data and then normalize them; (2) gridding multiresolution segmentation; (3) calculate Moran’s I value construct topology graph; (4) unsupervised deep learning; (5) within-object statistical analysi...

Pseudocoarctation of the aorta is a rare congenital anomaly of the aortic arch, and it has been described as an elongation of the aortic arch with "kinking" at the level of the ligamentum arteriosum without a pressure gradient across the lesion. The treatment for this condition is controversial. We report here on an unusual case of pseudocoarctation of the aorta associated with the anomalous or...

The effective action of 2+1 dimensional fermions at finite temperature in an arbitrary background is computed at leading order in a covariant gradient expansion using the ζ-function regularization. The parity anomaly is shown to be temperature independent. An explicit closed form is given for the parity anomalous component of the effective action. The result checks the correct behavior under ga...

Abstract We present the results of a direct current (DC) resistivity and time-domain induced polarization (TDIP) survey exploring copper ore deposit in Elbistan/Turkey. The is elongated below valley disseminated form with sulfide content. DC IP data were acquired using pole-dipole array on eight parallel profiles crossing perpendicularly. length each profile was 300 m an inter-profile distance ...

The occurrence characteristics of magnetite and the methods to quickly effectively explore are important topics for ore prospecting in new era. Taking northeast Hebei Province China as an example, this article aimed at strategic mineral magnetite, then discussed its distribution aeromagnetic exploration it. First all, we discuss sedimentary metamorphic magmatic magnetite. Then, using latest hig...