How to calculate the basic parameters of a rotary vacuum filter

1967 ◽  
Vol 3 (2) ◽  
pp. 81-85
Author(s):  
�. N. Ginzburg ◽  
G. A. Roginskii ◽  
A. D. Dmitrievskaya
Keyword(s):  
Vacuum Filter ◽  
Basic Parameters ◽  
Rotary Vacuum

Analysis of the precipitation reactor-separation equipment system. Continuous reactor and the rotary vacuum filter operating at the selected negative pressure drop

1981 ◽  
Vol 46 (10) ◽  
pp. 2364-2370 ◽  
Author(s):  
Otakar Söhnel
Keyword(s):  
Pressure Drop ◽  
Negative Pressure ◽  
Continuous Reactor ◽  
Vacuum Filter ◽  
Continuous Precipitation ◽  
Derived Relations ◽  
Filtration Area ◽  
Separation Equipment ◽  
Unit Output ◽  
Rotary Vacuum

An analysis has been performed of the continuous precipitation reactor - rotary vacuum filter system (operating at the selected negative pressure drop) on the basis of the unit output. Filtration area necessary for separation of the product from the precipitation reactor is a function of the mean residence time of suspension in the reactor, concentration of the precipitating solutions, porosity of the filtration cake and the filtration negative pressure drop. Application of the derived relations is demonstrated on the continuous precipitation of Mg(OH)2.

Effect of Titanium Dioxide Manufacturing Waste in Mechanical Properties of Red Ceramics

2015 ◽  
Vol 1120-1121 ◽  
pp. 38-42
Author(s):  
Daniel Véras Ribeiro ◽  
S.C. Figueiredo ◽  
Alexandre T. Machado ◽  
F.R. Valenzuela Diaz ◽  
C.A.C. Souza
Keyword(s):  
Mechanical Properties ◽  
Titanium Dioxide ◽  
Flexural Strength ◽  
Water Absorption ◽  
Linear Shrinkage ◽  
Apparent Porosity ◽  
Vacuum Filter ◽  
Rotary Vacuum ◽  
Filter Mud ◽  
Red Ceramics

Rotary-vacuum-filter mud (RVFM) is waste generated during the manufacturing process of titanium dioxide. In this work, RVFM and ceramic bricks containing different ratios of this waste are investigated. The mud samples were characterized using thermal analysis (TG/DTG). The aim of the present work was to determine the effect of adding RVFM on the ceramic properties of clay, such as apparent porosity, water absorption, linear shrinkage and flexural strength, used to produce blocks and tiles. Samples were dried out at 110°C and fired at 800°C, 950°C and 1100°C. The addition of RVFM tends to increase the apparent porosity and water absorption and to decrease the flexural strength of the ceramic specimens. Based on the results, ceramic specimens with 20% RVFM content burned at 800°C can not be used as bricks, and ceramic specimens with 20% RVFM content fired at 800°C and 950°C can not be used as tiles, according to Brazilian standards.

Models of comets with strongly variable nongravitational effects

1999 ◽  
Vol 173 ◽  
pp. 381-387
Author(s):  
M. Królikowska ◽  
G. Sitarski ◽  
S. Szutowicz
Keyword(s):  
Cometary Nucleus ◽  
Spin Axis ◽  
Reactive Force ◽  
Orbital Elements ◽  
Cometary Nuclei ◽  
Short Period ◽  
Basic Parameters ◽  
Polar Radius ◽  
Cometary Activity ◽  
Nongravitational Effects

AbstractThe nongravitational motion of five “erratic” short-period comets is studied on the basis of published astrometric observations. We present the precession models which successfully link all the observed apparitions of the comets: 21P/Giacobini-Zinner, 31P/Schwassmann-Wachmann 2, 32P/Comas Solá, 37P/Forbes, and 43P/Wolf-Harrington. We used the Sekanina's forced precession model of the rotating cometary nucleus to include the nongravitational terms into equations of the comet's motion. Values of six basic parameters (four connected with the rotating comet nucleus and two describing the precession of spin-axis of the nucleus) have been determined along the orbital elements from positional observations of the comets. The solutions were derived with additional assumptions which introduce instantaneous changes of modulus of reactive force,Aand of maximum of cometary activity with respect to perihelion time. The present precession models impose some contraints on sizes and rotational periods of cometary nuclei. According to our solutions the nucleus of 21P/Giacobini-Zinner with oblateness along the spin-axis of about 0.32 (equatorial to polar radius of 1.46) is the most oblate among five investigated comets.

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