Search results

After the reduction of charge and electrokinetics potential, the particles present a natural association face-toface type.
The face-to-face flocculation create a system with a more closed structure then in the house-of-card flocculation and this contribute to a collapse and reduction of rheological parameters.
From the data in Table 3 and according to Miano and Rabaioli [6], in the dispersions of Bofe clay treated with Na2CO3 followed by Mg(OH)2 there is a tendency to a face-to-face interaction, while in the dispersion of Chocolate and Verde-lodo clays also treated with Na2CO3 followed by Mg(OH)2 the main types of interaction are face-to-face and/or edge-to-edge.

Domestic and foreign fine hematite ore beneficiation technology Foreign fine hematite ore beneficiation technology World iron ore resources are enrich, according to the United States Geological Survey data of 2009,the global iron ore reserve base is 3500 hundred million ton(according to the iron content was calculated to be 1600 hundred million ton ).The global iron ore is abundant, relatively concentrated distribution, the six top iron ore resources are these countries: Ukraine, Russia, China, Brazil, Kazakhstan, Australia, in total global reserves (including iron calculation ) accounted for77.5%.
Thus, flotation column in desulfurization and silicon reduction of iron concentrate plays an important role.
According to the ore property, Gong Changling ore dressing plant has worked with the Changsha Research Institute Of Mining and China Mining University, taken the lead in the domestic launch technology of flotation column research to reverse flotation iron element and silicon reduction for the concentrate of magnetic separation, can obtain high grade iron concentrate which iron grade is 69.15%, the content of Si02 is 4.40%,the recovery of iron is 95.81% ,ideal industrial test of operating parameters is that: the reagent of twelve amine is 160 - 180g/t, roughing cycle slurry pressure is 0.30MPa, slurry concentration is 40%-45%.Using flotation column conduct once rough twice scavenging process, compared with the existing flotation machine which has quintic section roughing quartic concentrating,and roughing middlings return to regrinding process, flotation column simplify the process and realize the short flow separation.

Over 60% of weight reduction could be obtained by replacing a steel spring with a composite one with the same function.
The model predictions have been verified with test data.
Result on the third eye end design shows that this option led to a significant reduction of shear stresses in the critical area where they occurred with the previous designs.

After the immersion test, cleaning specimen and measuring weight reductions were carried out according to ASTM G1 standard. [4].
The long-term immersion data of 24 hours shows that there is no significant difference in the corrosion rate between 6 and 24 hours for ANCOR-S steel.
Corrosion rate calculated by using the surface thickness reduction as a result of field test was measured as 0.07 mm/year for ANCOR-S and 0.14 mm/year for SPHC.

It is clear that the data of 0~20V and those of -20~0V are not overlapped, i.e., the I-V curve is asymmetric.
Section A (-20~0V) depicts that the capacitance is gradually increased with the reduction of bias voltage as a result of the varistor transiting from a conducting state to a dielectric state.
This reduces charge storage ability, which seemingly results in the reduction of capacitance.

The following physical properties for the hydrated electron have been experimentally established: oxidation-reduction potential makes –2.7 V; average radius of charge distribution – 0,28 nanometers; theoretical time of appearance – s; it is experimentally established that the hydrated electron is formed during period less than 0.02 nanoseconds.
The majority of metals of the first group have more negative oxidation-reduction potentials therefore their cations can't be restored to atoms of metals.
There are interesting data [12] on reaction of an ion of Аg+ silver with and formation of Ag0aq.

The circular TLM data indicated a ρc of below 10-5 Ohm • cm2 with a sheet resistance of around 400 Ohm/sq.
Accordingly, the double passivation schemes of Si3N4 / Si3N4 shows the reduction leakage current, the improve maximum saturation current density, the peak extrinsic trans- conductance with threshold voltage and the reduction sub-threshold leakage drain current relative than other passivation schemes.

And savings of a small percentage in the operation represent a significant reduction in operation cost as well as in the quantities of coal consumed [4].
A regional coupled coal and power management system is proposed for demonstrating the method based on representative technical data from related literatures.
The results obtained from the model can generate decision alternatives which can help decision maker obtain optimal coal-blending schemes and coal-allocation patterns, and savings of a small percentage in the operation of a moderately large power system represent a significant reduction in operation cost as well as in the quantities of coal consumed.

The starting composition M1 was chosen on the basis of our previous results [9], and the compositions of other mixtures were determined with the intention to investigate the influence of the reduction of dopant concentrations on the electrical properties, as well as to investigate the processes taking place at the grain boundaries.
Mixture ρ/ρT [%] α Φb [eV] Eb [V/cm] M1 96.62 28 0.58 8547 M2 96.72 29 0.62 4414 M3 96.46 18 0.66 4879 M4 96.54 3 0.45 484 M5 96.54 18 0.47 1875 M6 96.80 16 0.42 1916 The obtained values of Φb (Table 2) in samples M1, M2 and M3 are sufficiently high and in accordance with the literature data reported for similar SnO2 varistor compositions [10,11].
Reduction of the dopants amounts below these values resulted in an insufficient quantity of dopants to reach a homogeneous distribution.

Among functions required for fuel injection systems of ship engines, post injection for use of NOx catalyst, ramp for reduction in formation of nitrogen oxides, and boot type injection are methods of resolving such environmental problems.
Demand for common rail system is increasing as an alternative for reduction of emission gases in relation to environmental problems.
Central processing unit receives spindle current signals and RPM signals to monitor the status of drill, and it also receives the signal line of tilt sensor module to obtain data such as drill header angle.