Do coal chemists need to prepare samples?

Coal chemists usually need to prepare samples for analysis when analyzing coal samples. Coal sample preparation is to sample and treat raw coal to obtain coal samples that meet the experimental requirements. The purpose of coal sample preparation is to ensure that the analyzed coal sample can represent the characteristics of raw coal and provide accurate and reliable experimental data.

In coal testing, the sample preparation process of coal samples usually includes the following steps:

1. sampling: randomly collect coal samples from coal piles or during coal transportation. When sampling, certain norms and methods should be followed to ensure the representativeness and reliability of sampling.

2. Crushing: Crushing the lump coal obtained by sampling into small particles suitable for experimental operation.

3. Mixing samples: fully mix the broken coal samples to ensure the uniformity and consistency of the whole sample.

4. Sampling: take a part of the mixed sample for secondary processing, such as fine grinding or fine grinding, so as to obtain the final sample that meets the experimental requirements.

The process of sample preparation is mainly to reduce the error of the sample and ensure the accuracy and reliability of the experimental data. Through sample preparation, the interference of foreign bodies in raw coal can be eliminated, the error of coal quality parameter analysis can be reduced, and the repeatability and comparability of the experiment can be improved.

Therefore, as a coal chemist, sample preparation is a very important work, which is of great significance to coal quality analysis and coal technology research.