Coal blending problem, how to convert the base state of coal?

Can refer to* * The standard "Coal Quality Analysis" contains formulas for various transformations of coal base.

Baseline explanation: Analytical basis (ad): When conducting coal quality analysis and testing, the coal sample is in an air-dry state. 　　Dry basis (d): When conducting coal quality analysis and testing, the coal sample is in a moisture-free state. 　　receive base(ar): When conducting coal quality analysis and testing, the state of the coal sample is the state in which the batch of coal was received. 　　Dry ash-free base (daf): This state of coal samples does not exist in reality. It is a water-free and ash-free state calculated as needed during coal quality analysis and testing. 　　Anhydrous and mineral-free base (dmmf): This state of coal samples does not exist in reality, and is also a converted water-free and mineral-free state. 　　Constant humidity ash-free base (maf): This state of the coal sample is also calculated. The meaning of constant humidity refers to the moisture of the coal sample (or the highest internal moisture) measured when the temperature is 30C and the relative humidity is 96%. ； base conversion: Some benchmarks do not exist in reality and are converted based on needs. ； Some benchmarks actually exist, but for convenience, sometimes they are not tested, but converted based on the analytical test results of known benchmarks, which is much simpler. When conducting coal quality analysis tests in the laboratory, the coal samples used are analytical coal samples. The analyzed coal sample is obtained after repeated crushing and reduction, and its state is air drying. Therefore, when analyzing coal samples for analysis and testing in the laboratory, the basis is the analytical base (also called air drying base). The analytical test results of coal sample analysis are directly measured in the laboratory. They are the most basic test results and the basis for converting other benchmark analytical test results. Conversion formulas between various benchmarks: dry basis conversion: 　　Xd=100Xad/(100-Mad)% where: 　　Xad - Analytical based test results ； 　　Mad - analysis base moisture ； 　　Xd——Test result converted to dry basis. Conversion of base received: 　　Xar=(100-Mar)/(100-Mad)% where: 　　Mar——Basic moisture received ； 　 　Xar - Laboratory results converted to basis received. Conversion of dry ash-free basis: 　　Xdaf=100Xad/(100-Mad-Aad)% where: 　　Aad - Analytical basis ash ； 　　Xdaf - test results converted to dry ash-free basis. When the carbonate content in coal is greater than 2%, the CO2 content in carbonate must be subtracted from the denominator of the above formula.