scholarly journals Calculation Method for Size Distribution Curve of Aerosol Fitted by Spline Function

1987 ◽  
Vol 16 (5) ◽  
pp. 339-339 ◽  
Author(s):  
Mitsuhiro MATSUMOTO ◽  
Naotaka UEDA ◽  
Yoshitaka NISHIKAWA
Keyword(s):  
Size Distribution ◽  
Calculation Method ◽  
Spline Function ◽  
Distribution Curve

scholarly journals Methodology for determining rom size distribution

2014 ◽  
Vol 67 (4) ◽  
pp. 405-412
Author(s):  
Christiane Ribeiro da Silva ◽  
Vládia C. G. de Souza ◽  
Jair C. Koppe
Keyword(s):  
Size Distribution ◽  
Distribution Curve ◽  
Size Distributions ◽  
Sampling Protocol ◽  
Product Size ◽  
Operational Conditions ◽  
Specific Protocol ◽  
Open Side ◽  
Ore Dressing

A methodology to determine the size distribution curve of the ROM was developed in a Brazilian iron ore mine. The size of the larger fragments was determined taking photographs and setting the scale of the images to analyze their dimensions (length of their edges and areas). This was implemented according to a specific protocol of sampling that involves split and homogenization stages in situ of a considerable quantity of ore (about 259 metric tonnes). During the sampling process, larger fragments were separated and smaller size material was screened. The methodology was developed initially in order to preview the performance of a primary gyratory crusher that is fed directly from trucks. Operational conditions of the equipment such as closed and open-side settings could be adjusted previously, obtaining different product size distributions. Variability of size of the fragments affects subsequent stages of crushing and can increase circulating load in the circuit. This leads to a decrease of productivity or recovery of the ore dressing. The results showed insignificant errors of accuracy and reproducibility of the sampling protocol when applied to friable itabirite rocks.

Effects of Anti-Oxidants on Size Distribution of Polycaprolactam during Melting and Melt-Spinning

1977 ◽  
Vol 47 (2) ◽  
pp. 132-139 ◽  
Author(s):  
T. K. Bhattacharya ◽  
MD. Abubakkar ◽  
A. K. Mukherjee
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Thermal Degradation ◽  
Size Distribution ◽  
Melt Spinning ◽  
Distribution Curve ◽  
Atmospheric Condition ◽  
Nitrogen Atmosphere ◽  
Atmospheric Conditions

The changes in the size distribution of polycaprolactam that take place during melting and melt-spinning have been studied. During melting under a nitrogen atmosphere, thermal degradation as well as post polymerization takes place. Spinning the polymer under atmospheric conditions, thermal, thermo-oxidative, and mechanical degradations come into play. Post polymerization is also operative in this case. The net change that is being encountered in these processes is a broader size distribution of the polymer as compared to that of the parent one. The effects of three different anti-oxidants, which are paraphenylene diamine derivatives, on the size distribution of polycaprolactam during melting and melt-spinning have been studied. Anti-oxidants are found to check the broadening of the size-distribution curve and retain the mechanical properties of the material to an appreciable extent, even after heat treatment at a temperature of 160°C for 8 hours under atmospheric condition.

scholarly journals The apparent density as a function of the specific surface of copper powder and the shape of the particle size distribution curve

2003 ◽  
Vol 68 (11) ◽  
pp. 903-907 ◽  
Author(s):  
Konstantin Popov ◽  
Predrag Zivkovic ◽  
Snezana Krstic
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Specific Surface ◽  
Size Distribution ◽  
Apparent Density ◽  
Copper Powder ◽  
Distribution Curve ◽  
Particle Size Distribution Curve ◽  
Sulfate Solutions ◽  
Copper Powders

The relation between the specific surface and apparent density of copper powders electrodeposited from acid copper sulfate solutions is established. It is shown that the apparent density is inversely proportional to the specific surface of copper powder. The shape of the particle size distribution curve is also discussed.

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