Wholesale Anthracite Cor Factory – Certificate of Certified Reference Material Ash fusibility – Shandong Institute of Metallurgical Science
Wholesale Anthracite Cor Factory – Certificate of Certified Reference Material Ash fusibility – Shandong Institute of Metallurgical Science Detail:
This certified reference material is made from carefully selected raw coal. The coal was air dried, reduced in size to <0.2mm and ignited at 815℃ to constant mass and homogenized, then packaged in to individual bottled units.
The homogeneity test was done on the bottled units by determination of the sulfur in ash and FT under the reducing atmosphere. The minimum mass of sample taken for analysis is 0.05g(sulfur) and about 0.15g(FT). Variance analysis showed that the variability among different bottles was not significantly different from the variability between replicate determinations.
Sample Number |
Testing atmosphere |
Certified value and Uncertainty |
Characteristic Melting Temperature (℃) |
|||
Deformation Temperature (DT) |
Softening Temperature (ST) |
Hemispheric Temperature (HT) |
Flowing Temperature (FT) |
|||
GBW11124g |
Reducing |
Certified value Uncertainty |
1161 17 |
1235 18 |
1278 14 |
1357 16 |
Oxidizing |
Certified value Uncertainty |
1373 15 |
1392 16 |
1397 13 |
1413 19 |
Here, the reducing atmosphere is obtained by introducing into the furnace the mixture gases of (50±5)% CO2 and (50±5)% H2 (in the most tests) or by sealing in the furnace the proper ratio of graphite and anthracite (in a few tests); the oxidizing atmosphere is obtained with air circulates freely through the furnace.
The certification analyses were performed according to the Chinese National Standard GB/T219-2008 by several qualified laboratories.
The certified value is expressed as XT±U,were XT is the mean value and U is the expanded uncertainty(95% confidence level).
The preparation of samples, the statistical analysis and overall direction and coordination of the technical measurements leading to certification were by China National Coal Quality Supervision and Testing Center, China Coal Research Institute.
This certified reference material is stable at long time. China National Coal Quality Supervision and Test Center will monitor the change of certified value regularly and inform the users if any significant change is observed.
1) This certified reference material is packed in a plastic bottle, 30g/ bottle.
2) The bottle containing material should be kept tightly stopped and stored in cold and dry place, and opened only when necessary.
3) This certified reference material is mainly used in the examination of the testing
atmosphere and the estimation of the test result. The testing atmosphere is correct if the differences between test result and certified value of ST, HT, FT are not over 40℃; otherwise, the testing atmosphere is not correct, and some adjustments are necessary.
4) This certified reference material is not applicable in the identification of the deviation of furnace temperature, the users should be sure the furnace temperature has been controlled correctly before the testing.
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The key to our success is "Good Product Quality, Reasonable Price and Efficient Service" for Wholesale Anthracite Cor Factory – Certificate of Certified Reference Material Ash fusibility – Shandong Institute of Metallurgical Science , The product will supply to all over the world, such as: Barbados, Finland, Malta, With strong technical strength and advanced production equipment, and SMS people purposefully , professional, dedicated spirit of enterprise. Enterprises took the lead through the ISO 9001:2008 international quality management system certification, CE certification EU ; CCC.SGS.CQC other related product certification. We look forward to reactivating our company connection.
By Sophia from Norway - 2018.09.16 11:31
Company director has very rich management experience and strict attitude, sales staff are warm and cheerful, technical staff are professional and responsible,so we have no worry about product,a nice manufacturer.
By Alexandra from Lithuania - 2018.09.19 18:37