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The silica fume is in amorphous form, and it has some special powder properties such as ultra fine grain size and high specific surface area and high chemical activity, these provide favorable foundation for low energy consumption process of recycling the powder.
And a large number of manpower and material resources consumed to overstock the low quality micro silica powder with ferrosilicon production increased more and more. 
CONCLUSIONS The silica fume is in amorphous form, and it has some special powder properties such as ultra fine grain size and high specific surface area and high chemical activity, these provide favorable foundation for low energy consumption process of recycling the powder.

To achieve improvements in the mechanical properties, fine grain size, homogeneous microstructure and high density are desirable.
Hence significant grain growth takes place.
Acknowledgements The authors thank DPT (the State Planning Organization of Turkey) for providing financial support for this work under project number 2001K120590.

Low threshold make mining grain size small, but increase working time.
So, the system can customize topic grain size based on users’ demand.
The measure needs to calculate the total number of documents, doc number of each cluster and doc number of a cluster after deleting all documents of selected clusters.
Calculating these numbers seems very complicated.
S is total number of selected words.

Background image can be represented as, x and y are the row and column numbers of pixels in an image
And the number of connected domain is counted.
If the number of connected domains is larger than 0, the current frame contains the flour bag.
That is, the total number of pixels is calculated.
Grain Processing, 2011, 36(1):66-69

The investigated mixtures were numbered from 10 to 14.
Therefore, the mixture number 10 used a standard amount, without fine adjustment of oxides.
This resistance is assessed by using integer number from 1 to 5.
The lower the number, the better the resistance.
[6] ISO – International Organization for Standardization – ISO 719 – Glass Hydrolytic Resistance of Glass Grains at 98oC, (1985)

The shear angle is predicted to occur at one which the minimum value of the effective Taylor factor determined from the load instability criterion is a minimum and the number of dislocation slip systems is also smallest [6].
There is a good agreement between the experimental findings and the predicted results. 2.2 Characterization of the dynamic cutting system The influence of vibration on the surface roughness machined with a single point tool has been previously studied by a number of researchers [7 - 9].
It uses the surface roughness profiles predicted at a finite number of equally spaced radial sections of the workpiece to construct the surface topography of a diamond turned surface.
The roughness data are determined from the surface roughness profiles predicted at a finite number of equally spaced radial sections on the workpiece as shown in Fig. 4.
Discussions and Conclusions This research presents a multi-scale model is proposed to explain the effect of material induced vibration and the quantitative relation between cutting force and the surface quality from dislocations, grain orientations, cutting tools, machine tools used in the simulation of the nano-3D surface topology in single-point diamond turning.

E.g. in Ref. [34] it was found that sintered Ni-Mn-Ga has a nearly three times higher tensile fracture strength than arc-melted Ni-Mn-Ga, while [35] found that grain boundaries are ductile and fracture occurs at grain boundaries most likely through impurity segregation.
While small grained polycrystalline bulk MSMAs showed less than 0.01% MFIS due to neighboring grains constraining each other [38-40], recovery strains of up to 1% were found in coarse grained, mechanically trained, and strongly textured polycrystalline MSMA in an orthogonal magnetic bias field [41-42].
The surface layers of spark eroded (Fig. 18a) and mechanically polished (Fig. 18b) samples contain a large number of defects.
Stronger surface deformation implies a larger number of stronger defects.
For very thick twins, the large number of twinning disconnections multiplies the stress on the leading disconnections.

Its main ingredients was graining blast furnace slag. on the chemical activation, its activities were substantially improved, and the technical parameters of the filling body were markedly ameliorated.
The granulating blast furnace slag of the Tangshan area was produced by modern powder grinding process-vertical rolling mill machining, and its characteristics contain steady fineness, reasonable grain size distribution, small water requirement, high hydration activity.
In the first day, a large number of hydration products produced, some acicular ettringite crystals were generated, they began to fill the interplace of backfilling materials and backfilling materials particle, backfilling materials and cementitious materials particles.

Number simulation is a good way to predict the consequent of dust explosion, but the known of reaction kinetics of hazardous materials is necessary.
Wang: Experimental investigation and numerical simulation of grain dust explosion.

Fractographic examination showed the presence of striations in Paris domain and secondary cracks at grain boundaries.
In fatigue tests, we note the crack length (mm) versus number of cycles N (a=f(N)).
At R=0.5, the fatigue life is affected by the amplitude of loading, where a decrease in number of cycles is significant [20].