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Figurę 3. Coal blending process in Train loading station of Anjialing Preparation Plant

4. Application of the Thermo Scientific CQM Online Coal Analyzer in Anjialing coal preparation plant’s loading station

(l)Online coal analyzer CQM Introduction

The CQM online coal analyzer consists of different sensors (elemental analysis, moisture measurement, density measurement) and a belt control unit. This combination enables instant measurement of moisture, ash, sulfur and heat content in the coal. The unit uses californium 252 as a neutron source and employs Prompt Gamma Neutron Activation Analysis, PGNAA, to detect the content of most of the elements of coal, including C , H, N, S, Si, Al, Fe, Ca, Ti, K, Na, Cl, and B. Density measurement uses cesium-137, a weak y-ray, as the radiation source, and its attenuation in passing through the coal stream is proportional to density. Moisture is measured by a microwave instrument using a propagation delay principle. The four systems work together to show coal ąuality each minutę. These results, which can also be shown on a train cumulative basis, as well as analyzer status information, are found on the Operator Console. Therefore, the loadout operators, who are responsible for blending, can see the quality of the loaded Coal and greatly improve the accuracy of the blending to ensure ąuality and commercial compliance.

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