Sieve size

Specifications and Analysis. R%-MaHc acid that is sold in the United States meets the specifications of the Food Chemicals Codex and National Formulary, which are Hsted in Table 5 (40,41). MaHc acid is available in the following U.S. standard sieve sizes ... 

The particle mass retained by each sieve is determined by weighing after drying when necessary, and each fraction is designated by the sieve size it passed and the size on which it was retained. The sieve diameter of a particle is therefore defined as the size of the sieve aperture through which the particle in question just passes through. Mass fractions of the particles are then presented in tabular or graphical form. 

Unit matrix in mill equations X Particle size or sieve size cm in... 

Cbarcoal usually is ground in hammer mills with screen or air classification. For absorption of gases it is usuahy crushed and graded to about No. 16 sieve size. Care should be taken to prevent it from igniting during grinding. 

Soaps Soaps in a finely divided form may be classified as soap powder, powdered soap, and chips or flakes. The term soap powder is applied to a granular product. No. 12 to No. 16 sieve size with a certain amount of fines, which is produced in hammer mills with perforated or slotted screens. 

Use of arithmetie graph paper tends to buneh at the lower end (due to the expansion of the sieve size seale). This ean be overeome by use of semi-log or log-log graph paper. Also note that eumulative graphs have the effeet of smoothing out the data. This ean be a useful effeet in the presentation of data Care should be exereised, however, to prevent important features of the distribution being obseured in analytieal work. 

Garside, J. and Jancic, S.J., 1976. Growth and dissolution of potash alum crystals in the sub-sieve size range. American Institution of Chemical Engineers Journal, 22, 887. 

The performance of the Micromerograph has been of interest ever since its introduction because of its potential for a much needed improvement in the analyses of the important sub-sieve sized ingredients of Ordnance. It has been evaluated relative to several other instruments Coulter Counter... 

Particle sizes are conventionally described in different units depending on the size range involved. Coarse particles are measured in inches or centimeters fine ones, in terms of sieve size very fine ones in microns or millimicrons. The sizes of ultrafine particles are sometimes specified in terms of their surface per unit mass, this being commonly expressed in square meters per gram. 

The grain size distribution of spent foundry sand is very uniform, with approximately 85 to 95% of the material between 0.6mm and 0.15mm (No. 30 and No. 100) sieve sizes. Five to twelve percent of foundry sand can be expected to be smaller than 0.075 mm (No. 200 sieve). The particle shape is typically subangular to round. Spent foundry sand gradations are too fine to satisfy the fine aggregate standard specified in specification ASTM C33 Standard Specification for Concrete Aggregates. 

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