Waste copper slag is a typical hazardous solid waste containing variety of valuable elements and has not been effectively disposed so far. In this paper, stepwise extraction process was proposed to recover (copper, iron, lead zinc) from slag. The specific procedures are as follows: (1) A flotation adopted enrich copper, when the grade in concentrate 21.50%, recovery rate 77.78%. (2) tailings we...

The nuclear magnetic resonance of Zn in hexagonal close-packed Zn metal has been observed at 4.2 K by pulsed NMR with three different frequencies. The spin echo profile showed a well resolved powder pattern due to electric quadrupole interaction. The quadrupole coupling constant was determined to be e q Q/h = 12.0 (4) MHz. The spinspin and spin-lattice-relaxation times were measured to be T2 = ...

We present a pore-scale study of two-phase relative permeability in homogenous-wet porous media, and porous media altered to a mixed-wet state. A Shan-Chen type multicomponent lattice Boltzmann (LB) model is employed to determine pore-scale fluid distributions and relative permeability. Mixedwet states are created by altering the wettability of solid surfaces in contact with the nonwetting phas...

The reaction between P2-type honeycomb layered oxides Na2Ni2TeO6 and K2Ni2TeO6 enables the formation of NaKNi2TeO6. compound is characterized by X-ray diffraction 23Na solid-state nuclear magnetic resonance spectroscopy, structure discussed through density functional theory calculations. In addition to Ni/Te cationic ordering, NaKNi2TeO6 exhibits a unique example alternation sodium potassium la...

BACKGROUND Congenital intracranial tumors as a group are quite rare, representing only 0.5% to 1.5% of all pediatric brain neoplasms. CASE REPORT We reported a case of congenital mixed neuronal-glial tumor detected by ultrasound at 30 weeks of gestation. It showed that the tumor was 2.5 × 2.3 × 2.1 cm in size, located in the sellar region, regular shape, and slightly heterogeneous solid mass ...

A superconducting (SC) mixed state occurs in type-II superconductors where the upper critical field ${H}_{c2}$ is higher than thermodynamic ${H}_{c}$. When an applied between these fields, free energy depends weakly on order parameter which therefore can be small (SC state) or zero (normal at different parts of sample. In this paper we demonstrate how a normal along line traversing superconduct...