Rational grain size compositions of magnesite powder for the bottoms of open-hearth furnaces working with the combined process method

Refractories ◽  
1967 ◽  
Vol 8 (1-2) ◽  
pp. 108-110
Author(s):  
A. S. Freidenberg
Keyword(s):  
Grain Size ◽  
Open Hearth ◽  
Magnesite Powder ◽  
Combined Process ◽  
Process Method

The Lapping Experimental Research Based on Multi-Unit-Lapping Plate

2010 ◽  
Vol 37-38 ◽  
pp. 1493-1496 ◽  
Author(s):  
Wei Hang ◽  
Fan Jiang ◽  
Zhao Zhong Zhou ◽  
Yong Dai
Keyword(s):  
Grain Size ◽  
Experimental Research ◽  
Processing Conditions ◽  
Optimal Parameters ◽  
Machining Performance ◽  
Cutting Depth ◽  
Abrasive Grains ◽  
Depth Processing ◽  
New Process ◽  
Process Method

A new process method called multi-unit-lapping plate process is proposed in this paper. This technique could reduce change of cutting depth owing to difference of grain size and protrusion height of surface abrasive of grinding plate, and near equal-cutting-depth processing is realized. For characteristics and machining performance of multi-unit-lapping, this paper reports the following studies: A new experiment was carried out with the optimal parameters and compared with the traditional plate, under the same processing conditions. The results showed that the abrasive grains cutting depth changed obviously with multi-unit-lapping plate.

Refining magnesite powder to repair open-hearth furnace bottoms

Metallurgist ◽  
1984 ◽  
Vol 28 (10) ◽  
pp. 358-358
Author(s):  
V. A. Klyuchko ◽  
B. M. Luzin
Keyword(s):  
Open Hearth ◽  
Open Hearth Furnace ◽  
Magnesite Powder ◽  
Hearth Furnace

The Vanadium Titanium Magnetite Tailings of Chengde Area Comprehensive Recycling Situation and Development Trend

2013 ◽  
Vol 753-755 ◽  
pp. 28-31
Author(s):  
Shu Xian Liu ◽  
Jun Cong Wei ◽  
Shao Bo Wei ◽  
Yi Miao Nie
Keyword(s):  
Iron Ore ◽  
Development Trend ◽  
Process Selection ◽  
Combined Process ◽  
Flotation Process ◽  
Combination Process ◽  
Iron Ore Tailings ◽  
Vanadium Titanium ◽  
Titanium Magnetite ◽  
Process Method

Summarized the siutuation of the vanadium titanium magnetite tailings recycling in Chengde, TiO2 in ilmenite tailings grade almost more than 2%, caused by TiO2 resources waste, put forward by gravity separation, magnetic separation,and flotation combined process method for titanium iron ore tailings reelection, and put forward the technological process selection by reducing the grinding fineness, increasing number of handpick and scavenging, adopt combination process and increasing flotation process to increase the recovery rate of TiO2, reduce TiO2 grade in the tailings.

Effect of Shock Loading on the Microstructure of Uniloy 326

1974 ◽  
Vol 32 ◽  
pp. 504-505
Author(s):  
K. P. Staudhammer ◽  
L. E. Murr
Keyword(s):  
Grain Size ◽  
Shock Loading ◽  
Current Investigation ◽  
Two Phase ◽  
05 C ◽  
Shock Deformation ◽  
Heat Treated

The effect of shock loading on a variety of steels has been reviewed recently by Leslie. It is generally observed that significant changes in microstructure and microhardness are produced by explosive shock deformation. While the effect of shock loading on austenitic, ferritic, martensitic, and pearlitic structures has been investigated, there have been no systematic studies of the shock-loading of microduplex structures.In the current investigation, the shock-loading response of millrolled and heat-treated Uniloy 326 (thickness 60 mil) having a residual grain size of 1 to 2μ before shock loading was studied. Uniloy 326 is a two phase (microduplex) alloy consisting of 30% austenite (γ) in a ferrite (α) matrix; with the composition.3% Ti, 1% Mn, .6% Si,.05% C, 6% Ni, 26% Cr, balance Fe.

Aspects of microanalysis in a transmission electron microscope

1978 ◽  
Vol 36 (1) ◽  
pp. 510-511
Author(s):  
R. Sinclair ◽  
B.E. Jacobson
Keyword(s):  
Grain Size ◽  
Electron Beam ◽  
Electron Microscope ◽  
Chemical Analysis ◽  
Transmission Electron Microscope ◽  
Vapor Deposition ◽  
Critical Currents ◽  
X Ray ◽  
Fine Grain ◽  
Transmission Electron

INTRODUCTIONThe prospect of performing chemical analysis of thin specimens at any desired level of resolution is particularly appealing to the materials scientist. Commercial TEM-based systems are now available which virtually provide this capability. The purpose of this contribution is to illustrate its application to problems which would have been intractable until recently, pointing out some current limitations.X-RAY ANALYSISIn an attempt to fabricate superconducting materials with high critical currents and temperature, thin Nb3Sn films have been prepared by electron beam vapor deposition [1]. Fine-grain size material is desirable which may be achieved by codeposition with small amounts of Al2O3 . Figure 1 shows the STEM microstructure, with large (∽ 200 Å dia) voids present at the grain boundaries. Higher quality TEM micrographs (e.g. fig. 2) reveal the presence of small voids within the grains which are absent in pure Nb3Sn prepared under identical conditions. The X-ray spectrum from large (∽ lμ dia) or small (∽100 Ǻ dia) areas within the grains indicates only small amounts of A1 (fig.3).

Novel magneto-optical recording materials: Bi-substituted garnet films

1991 ◽  
Vol 49 ◽  
pp. 776-777
Author(s):  
Takao Suzuki ◽  
Hossein Nuri
Keyword(s):  
Grain Size ◽  
Amorphous Film ◽  
Nitrogen Atmosphere ◽  
Optical Recording ◽  
Garnet Film ◽  
Media Noise ◽  
Garnet Films ◽  
Order Of Magnitude ◽  
A New Technique ◽  
A Current

For future high density magneto-optical recording materials, a Bi-substituted garnet film ((BiDy)3(FeGa)5O12) is an attractive candidate since it has strong magneto-optic effect at short wavelengths less than 600 nm. The signal in read back performance at 500 nm using a garnet film can be an order of magnitude higher than a current rare earth-transition metal amorphous film. However, the granularity and surface roughness of such crystalline garnet films are the key to control for minimizing media noise.We have demonstrated a new technique to fabricate a garnet film which has much smaller grain size and smoother surfaces than those annealed in a conventional oven. This method employs a high ramp-up rate annealing (Γ = 50 ~ 100 C/s) in nitrogen atmosphere. Fig.1 shows a typical microstruture of a Bi-susbtituted garnet film deposited by r.f. sputtering and then subsequently crystallized by a rapid thermal annealing technique at Γ = 50 C/s at 650 °C for 2 min. The structure is a single phase of garnet, and a grain size is about 300A.

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