赛车微信群

Hello and welcome to Hebi Excellent Electronic Technology Co., Ltd.!
Navigation
contact us
Service Hotline
0392-6612785
Contact: Manager Tian
Mobile: 13849239965
Fax: 0392-6696118
Email: hbzydzkj@126.com
Address: East section of Weihe Road, Qibin District, Hebi City, Henan Province
Position: Home > About Us > News > Industry Knowledge >
Determination of total moisture in coal samples (sample preparation procedure)
Author: technological excellence Date: 2019-11-18
Coal samples for total moisture determination shall meet the requirements of GB / T 211, and general preparation procedures.
Full moisture coal sample—weigh the air to dry and then weigh—13mm—3kg—6mm—1.25kg—moisture measurement sample.
The actual sample preparation can be adjusted according to specific conditions. When the sample moisture is low and the crushing and shrinking machine is used without substantial bias, it can be crushed to 6mm at a time and then to 1.25kg; when the sample size and particle size are too large, it can also be crushed to 13mm. Add a sample preparation stage. However, the particle size of each stage and the quality of the sample after shrinkage shall meet the requirements of 6.2.4.2.
a) Compare with the moisture measurement value of the coal sample which is not broken. But this method is only applicable to particle sizes below 13mm;
b) Contrast with manual multi-stage sample preparation-determination, that is, air drying to measure the external moisture, and then broken to an appropriate particle size to measure the internal moisture. However, a sealed, small air flow crusher and a splitter should be used for sample preparation.




Hebi Excellence Electronic Technology Co., Ltd.

East section of Weihe Road, Qibin District, Hebi City, Henan Province

Technical Support: Tianyu Network Yu ICP No. 18000462-1