Detection Of Ash Of Coal By Means Of Neutron Induced Prompt Gamma-ray Analysis

The sum of silicon dioxide, alumina, ferric oxide, calcium oxide and magnesia is more than 90% of the ash in coal. So, many laboratories regard the sum as the content of the ash. But the measure precision can't meet the requirement of industry . According to the figures given by the chemic measure, we can know that the sum of the contents of C, H, O, N, S and ash is 100% in coal. So, we can calculate the ash when we know the contents of C, H, O, N and S. When we calculate the contents of C, H, O, N and S, we have to compute the area of characteristic peak of γ-ray of these elements. Because of the statistic error, the system error and the error of data processing, the measure precision can't meet the requirement of industry in measurement precision. Therefore, we have to reduce the error which can be used in industry. Now we have discovered a better measure of computing the area of the characteristic peak of γ-ray, which make the measurement precision of the ash attain the requirement of coal industry. This paper introduces the analytical principle, the system and the data processing of the ash of coal by means of neutron induced prompt gamma-ray analysis by pulsed neutron generator.