scholarly journals Analysis of the connection of an idle MCP with three operating without a preliminary reduction in the power of the VVER-1000 reactor

2020 ◽  
Vol 1689 ◽  
pp. 012044
Author(s):  
A Muzafarov ◽  
S Nikonov
Keyword(s):  
Preliminary Reduction

scholarly journals Derivation of Pole Coordinates in a Uniform System from the Past ILS Data

1979 ◽  
Vol 82 ◽  
pp. 103-108 ◽  
Author(s):  
S. Yumi ◽  
K. Yokoyama ◽  
H. Ishii
Keyword(s):  
Uniform System ◽  
The Past ◽  
The Individual ◽  
Preliminary Reduction

The recomputation of the past ILS observations has been carried out at Mizusawa and partly at Cagliari. Preliminary reduction of the observations at the northern stations has been completed. The coordinates of the pole were calculated preliminarily and were compared with those by Vicente and Yumi (1969, 1970). It is known that the coordinates of the pole in the past ILS reports require considerable corrections which are probably mainly due to errors of the micrometer values. Magnetic tapes of the original observational records and of the individual latitudes are now available on request.

scholarly journals Preliminary reduction of chromium ore using Si sludge generated in silicon wafer manufacturing process

2018 ◽  
Vol 54 (1) ◽  
pp. 29-37 ◽  
Author(s):  
W.-G. Jung ◽  
G.-S. Back ◽  
F.T. Johra ◽  
J.-H. Kim ◽  
Y.-C. Chang ◽  
...  
Keyword(s):  
Manufacturing Process ◽  
Low Cost ◽  
Reduction Reaction ◽  
Ambient Atmosphere ◽  
Experimental Conditions ◽  
Basic Study ◽  
Chromium Ore ◽  
Wafer Manufacturing ◽  
Si Wafer ◽  
Preliminary Reduction

In order to promote the recycling of by-product from Si wafer manufacturing process and to develop environment-friend and low cost process for ferrochrome alloy production, a basic study was performed on the preliminary reduction reaction between chromium ore and the Si sludge, comprised of SiC and Si particles, which is recovered from the Si wafer manufacturing process for the semiconductor and solar cell industries. Pellets were first made by mixing chromium ore, Si sludge, and some binders in the designed mixing ratios and were then treated at different temperatures in the 1116?C?1388?C range in an ambient atmosphere. Cordierite and SiO2 were confirmed to be formed in the products after the reduction. Additionally, metal particles were observed in the product with Fe, Cr, and Si components. It is found that temperatures above 1300?C are necessary for the reduction of the chromium ore by the Si sludge. The reduction ratio for Fe was evaluated quantitatively for our experimental conditions, and the proper mixing ratio was suggested for the pre-reduction of the chromium ore by the Si sludge. This study provides basic information for the production of ferrochrome alloys on the pre-reduction of chromium ore using Si sludge.

Preliminary reduction of oxidized nickel ores

2014 ◽  
Vol 2014 (11) ◽  
pp. 853-860
Author(s):  
R. A. Pakhomov ◽  
R. V. Starykh
Keyword(s):  
Nickel Ores ◽  
Oxidized Nickel Ores ◽  
Preliminary Reduction

scholarly journals The relation between solar prominences and terrestrial magnetism

1903 ◽  
Vol 71 (467-476) ◽  
pp. 244-250
Keyword(s):  
Magnetic Activity ◽  
Magnetic Storms ◽  
The Sun ◽  
Terrestrial Magnetism ◽  
Previous Communication ◽  
Solar Prominences ◽  
Académie Des Sciences ◽  
Subsidiary Maxima ◽  
Preliminary Reduction

It has been stated in a previous communication that a preliminary reduction of the Roman observations of prominences, observed on the sun’s limb by Tacchini, indicated that, in addition to main epochs of maxima and minima of prominences coinciding in time with those of the maxima and minima of the total spotted area, there are also prominent subsidiary maxima and minima. One of us has pointed out in a recent communication to the Académie des Sciences that a comparison of the frequency of prominences visible in each solar latitude with the frequency of the most intense magnetic storms, indicated that ( a ) magnetic storms classed as “great” by Ellis, and the greatest prominence activity near the poles of the sun occurred at the same time; and ( b ) that the curve of general magnetic activity was nearly the same as that of the prominences observed near the solar equator.

AN INVESTIGATION OF SEMI-MICRO KJELDAHL METHODS

1934 ◽  
Vol 10 (1) ◽  
pp. 73-76 ◽  
Author(s):  
J. A. Scarrow ◽  
C. F. H. Allen
Keyword(s):  
Hydriodic Acid ◽  
Micro Scale ◽  
Kjeldahl Method ◽  
Preliminary Reduction

It is shown that the estimation of nitrogen by the Kjeldahl method on a semi-micro scale is more sensitive to variations in procedure than the corresponding macro method.Several methods of preliminary reduction, recommended for certain types of compounds, have been found difficult to adapt to semi-micro work. A method of reduction, involving use of hydriodic acid and phosphorus, has been developed for many such compounds.

scholarly journals The complex processing of titanomagnetite concentrates of the Gremyakha-vyrmes deposit with extraction of vanadium and titanium

2021 ◽  
Vol 12 (2-2021) ◽  
pp. 24-25
Author(s):  
A. S. Atmadzhidi ◽  
◽  
K. V. Goncharov ◽  
Keyword(s):  
South Africa ◽  
Titanium Dioxide ◽  
Blast Furnace ◽  
Vanadium Pentoxide ◽  
Raw Material ◽  
Titanium Dioxide Content ◽  
Complex Technology ◽  
Electric Smelting ◽  
Titanium Magnetite ◽  
Preliminary Reduction

Titanomagnetites are a complex raw material with a high content of valuable components: iron (35–65 %), vanadium (0.5–1.5 %) and titanium (2–14 %). Today, titanium–magnetite concentrates are processed in two ways: blast furnace (Russia, China) and using electric smelting (South Africa). The blast–furnace method is applicable only for low–titanium titanomagnetites. In the case of using titanomagnetite concentrates with a titanium dioxide content of more than 4 %, the method of electric smelting with preliminary reduction is applicable. Both technologies aim to recover the two components iron and vanadium, while titanium is not recovered. In this regard, the development of a complex technology for processing titanomagnetite concentrate to obtain iron in granular form, vanadium pentoxide and titanium is urgent.

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