ASTM D4292 Test Method for Determination of Vibrated Bulk Density of Calcined Petroleum Coke
4. Summary of Test Method
4.1 After appropriate crushing of the calcined coke, using both the jaw crusher and roll crusher, the test volume of 100 g is measured after vibration and the bulk density is calculated.
5. Significance and Use
5.1 Vibrated bulk density, VBD, is an indicator of calcined petroleum coke porosity, which affects its suitability for use in pitch-bonded carbon applications. (Warning - Vibrated bulk density for a sample of calcined petroleum coke is strongly dependent upon average particle size and particle size range. Bulk density tends to increase with decreasing coke size. A narrow particle size range for this test minimizes the possibility for variation due to skewing of the test sample toward either screen defining the sample. Particle size range tested should be agreed upon by the purchaser and supplier.)
NOTE 1 - An example of the use of VBD to characterize coke for prebaked anodes for aluminum smelting is reported by Belitskus who found particles passing through a 0.59-mm opening, No. 30, sieve and retained on a 0.30-mm opening, No. 50, sieve to be preferred. Other popular ranges are particles passing through a 2.36-mm opening, No. 8, sieve and retained on a 1.17-mm opening, No. 16, sieve for the continuous Soderberg anode process and particles passing through a 6.68-mm opening sieve (equivalent to a 3-mesh Tyler Standard Series) and retained on a 3.33-mm opening, No. 6, sieve for graphite electrode manufacture.
