How about carbon content of coal ash?
5. Fill in the records and present the report of the measurement result.6, in order to measure the accurate data, a sample should be tested in parallel with three crucibles at the same time, and the average of the results should be taken at last.
3, burning(1) prepared burning specimen with constant weight in the outer side of the crucible crucible, only a few 10-18ml and drying on the only black ink written into the code, mother Eph furnace, baby 50+-25 degrees Celsius temperature burning 1 hours after cooling, weighing with analytical balance, write down the number of crucible weight again after burning, and then weighed to weight two times constant (weight <=0.0004 grams). Record crucible weight G1.(2) place about 1 grams of dry ash sample in a constant crucible, and accurately weigh (accurate to 0.0001 grams), record (crucible + sample) weight G2. (3) a crucible with soil sample is placed in a crucible cover, heated to 875 degrees Celsius in the Maffei furnace for ignition, keep the temperature of 850+-25 degrees Celsius, after 2 hours, take out, after cooling, cooling to room temperature to put in a drying box. 4 W T'o X7 I3 L) |% "Z (4) weighing burned (crucible + specimen), down under the weight of G3.4. Calculate ash carbon content C (%) = (G2-G3) / (G2-G1) *100 (%)
Ash, carbon content, ash, carbon content, ash, carbon content, ash, carbon content, determination, determination, determination, determination (determination, determination)1 sampling(1) in the different positions of the ash, 7-10 points are deep to collect ash and 2-3kg. When sampling, not intentionally pick or avoid channels of ash, namely as ash samples taken, regardless of its size, regardless of the depth of color, regardless of its hardness, as far as possible to obtain a fully representative sample.(2) slag made on thick steel plate clean, which is smashed big gray block, mixing evenly into a cone, flattened, with a shovel cut ten sub center line, which is divided into 4 parts, two samples of diagonal, the other half abandoned.(3) repeat (2) operation. Reduce the amount to several times, until the ash is reduced to about 50 grams. Bring the ash back to the laboratory. The abandoned ash is discharged back into the ash heap.2, sample preparation(1) the ash in the laboratory will be retrieved and dried in a heated air drying oven (about 1 hours) at 105-110 degrees centigrade.(2) crushing the dry ashes with the disc vibrating mill, and the fine ash powder is the analysis sample.
