Sieve analysis test

Reduce... sieve analysis tests data and plot a grain size distribution curve. (3)... 

Another important and frequently used test throughout the industry is the moisture analysis test. This simple but effective test provides useful information regarding the processibility of plastic materials. Excessive moisture can cause many processing and visual problems such as splay marks. Bulk density tests and sieve analysis tests also help to predict the material s behavior during mixing, compounding, and processing. Chapter 7 discusses analytical tests often used in material characterization. 

In the United States, a number of physical tests are performed on siUcon carbide using standard AGA-approved methods, including particle size (sieve) analysis, bulk density, capillarity (wettabiUty), friabiUty, and sedimentation. Specifications for particle size depend on the use for example, coated abrasive requirements (134) are different from the requirements for general industrial abrasives. In Europe and Japan, requirements are again set by ISO and JSA, respectively. Standards for industrial grain are approximately the same as in the United States, but sizing standards are different for both coated abrasives and powders. 

Finally, one aspect that can pay a role in compositional studies is the sieve (screening) analysis. Like all petroleum products, sampling is, or can be, a major issue. If not performed correctly and poor sampling is the result, erroneous and very misleading data can be produced by the analytical method of choice. For this reason, reference is made to standard procedures such as the Standard Practice for Collection and Preparation of Coke Samples for Laboratory Analysis (ASTM D346) and the Standards Test Method for the Sieve Analysis of Coke (ASTM D293). 

Moisture assessment Drying endpoint target (moisture test) Granule size Sieve analysis... 

Receipts of active ingredient raw materials B1 and B2 are accepted by quality control based on standard tests for potency, chemical attributes, and particle size. Particle size is determined by sieve analysis. Unfortunately, this is a limit test in which 99% of the sample must pass through a certain mesh screen, therefore any influence particle size distribution might have on dosage form potency cannot be examined. 

ASTM D-4749. Standard Test Method for Performing the Sieve Analysis of Coal and Designating Coal Size. 

In the test method (ASTM D-1857 ISO 540), coal passing a number 60 (250 pm) sieve (analysis sample prepared in accordance with method ASTM D-2013) is heated gradually to a temperature of 800 to 900°C (1472 to 1652°F)... 

SatnpCe Preparation. Seventy grams of sample, previously calcined at 538°C, was dispersed in about 125 mL of sodium metaphosphate solution and "wet screened" using a sieve stack of 250, 270 and 325 mesh, 8-inch diameter sieves. The sieves were washed with water until the effluent was free of any particulate and then rinsed with acetone to de-water. After air drying, the contents of each sieve were transferred to a porcelain dish and the material was recalcined at 538°C. Appropriate weights taken during this procedure allowed for the determination of percent moisture in the starting material and sieve analysis relative to the appropriate sieve fractions. The total +325 mesh material was recombined and mixed for the test. 

Complete instructions and procedures on the use and calibration of testing sieves are contained in ASTM STP447B [7]. Contents include analytical methods, information relating to wire mesh, perforated plate and micromesh sieves, dry and wet testing and other methods. This publication also contains a list of all published ASTM standards on sieve analysis... 

For accuracy, it is necessary that the sieves be calibrated and, if the sieves are dedicated to a single powder, the calibration should be carried out with the powder under test. It is also necessary that the sieves be checked, on a regular basis using a calibration powder, so that worn sieves can be rejected. Normally, if a sieve analysis is plotted on log-probability paper, a smooth curve results any points lying off the curve should be viewed with suspicion. 

ASTM C136-96a Standard test method for sieve analysis offine and coarse aggregates, 212, 231... 

ASTM C285-88 (Re-approved 1994) Standard test method for sieve analysis of wet milled and dry milled porcelain enamel, for determination of the fineness of frit in wet-or dry-milled porcelain enamels and other ceramic coatings on metals by use of the number 200 or No 325 mesh, 212 ASTM C925-79 (Re-approved 1995) Standard test method for precision electroformed wet sieve analysis of non-plastic ceramic powders, for particle size distribution determination ofpulverized alumina and quartz for particle sizes from 45 pm to 5 pm by wet sieving, 212, 230... 

ASTM Cl 921-96 Standard test methodfor particle size (sieve analysis) of plastic materials, applicable to particle size determination of plastic materials in powdered, granular or pelleted forms by dry sieving with a lower limit of measurement of about 38 pm, 212... 

ASTM D1214-89 (Re-approved 1994), Standard test methodfor sieve analysis of glass spheres, 212... 

ISO 2395 (1990), Test sieves and test sieving-vocabulary, 212 ASTM E1638-94, Standard terminology relating to sieve analysis, 212 Bates, R.H. (1981), Proc. Filtech. Conf, 299-308, Uplands Press., Croydon, U.K., 213... 

ASTM D452-91 Standard Test Methodfor Sieve Analysis of Surfacing for Asphalt Roofing Products, 231... 

ASTM C325-81 (Re-approved 1997) Standard test method for sieve analysis of ceramic whiteware clays, 235... 

Particle shape can also influence particle size analysis. The particle size distribution measured by sieve analysis can be influenced by particle shape, because irregularly shaped panicles take longer to reach their final sieve. Biased results will be reported if the test is stopped before the particles reach their final sieve. 

Dry and wet sieve analysis can be conducted according to ASTM Cl 10-95b, sec. 5, Standard Test Methods for Physical Testing of Quicklime, Hydrated Lime and Limestone. Sieve analysis of magnesia powders finer than 100 mesh (U.S. Standard Sieve Series) can be performed using ASTM C110-95b, sec. 20. 

Sieve analysis of product was obtained from a pilot unit and is shown in Table 1 i. 3-8. Tests were conducted at operating conditions similar to those expected in the plant, A bolding time of 10.5 h was employed for the test. The weight distribution data from the plant are converted into population density in Table li.3-8. 

Coal/oil slurries were used in the instrument performance tests. The coal was finely ground Ohio 9, a high-ash highly volatile bituminous coal, the major constituents of which are 59 wt.% carbon, 4 wt.% hydrogen, 4 wt.% sulfur, and 24 wt.% ash. A sieve analysis disclosed that = 86% of the coal particles were of 63-125 om in diameter. The oil was a representative organic liquid used in the feedlines of some pilot coal conversion plants. Oil density at 20°C was 0.868 g/cm3. 

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