Ask about the sample collection procedures for coal quality analysis

During the preliminary investigation of a project, the focus is on analyzing the quality of the raw coal supply, in order to prepare for subsequent design work. If anyone knows anything about this, please let me know. Thank you

During sampling, 0.2 meters of the coal layer is removed, after which four points are taken at equal intervals at the bottom of the coal pile, one point at the top, and four more points at equal intervals in the middle of the coal layer – a total of nine points. If my answer does not match what you intended, please clarify your question in more detail

Thank you to “Tiān Bù Zài Lán”. To be more specific: 1. Coal is used in coal chemical industries; when collecting coal samples, should it be done in accordance with the standards for commercial coal samples rather than those for production coal samples, as there are respective national standards for sample collection in each case?； 2. Overall evaluation of the coal quality of the raw coal supplied by long-term coal mine suppliers; what should be done in principle regarding the collection of coal samples ； 3. Relevant literature suggests that, in order to ensure the representativeness of coal samples, sampling from coal piles or mine carts should be avoided as much as possible. What are your thoughts on this? 4. Additionally, how are the number of sub-samples and their weight determined when collecting coal samples? 5. Based on your experience, what are the things to keep in mind during the sampling process? Thank you, hehe. This post was last edited by simon2007 on 2007-12-19 at 11:26.]

Answer: 1. It is carried out by collecting samples of commercial coal; 2. Sampling must also be done strictly by batch, with regular inspections conducted based on actual conditions. 3. It seems you are asking about sampling in coal mines, right? It then depends on the sampling of the coal seams. 4. The number of sub-samples is determined based on the total amount of coal; there is no fixed requirement for the number, but each sub-sample should weigh at least 2 kilograms. 5. Different precautions are required depending on the sampling location – could you be more specific?

Thank you, thank you. To be more specific: we are the investors, and before the preliminary design phase begins, we will provide the design agency with a quality report on the coal to be used as raw material. So: 1. Should it be provided separately as raw coal (specifically for gasification) and fuel coal (specifically for use as fuel)? 2. How can a relatively accurate coal quality report for the raw coal used in the selected coal mine be provided to the design institute? 3. Should we be responsible for collecting the coal samples ourselves, or should we invite a professional agency to handle it on our behalf? Or more simply: this side of us just needs to do those things. Last edited by simon2007 on 2007-12-20 14:00]

After signing a contract with the supplier of the gasification process package, the supplier provides a detailed coal quality analysis report; the client only needs to supply the coal samples. Why carry out this analysis in advance? Moreover, the process package supplier provides such reports free of charge!

Industrial analysis and elemental analysis are required, as well as micro-analysis of ash content. The data from these analyses must be accurate and comprehensive, because the results of these analyses determine which gasification process to choose – which process is more suitable for you