APPARATUS FOR MEASURING MOISTURE CONTENT OF PARTICULATE MATERIAL

PURPOSE:To calculate the moisture content of a particulate material by compensating the mass change of a conveyor, by a method wherein two kinds of radioactive rays are emitted to two directions and one radioactive rays are passed through the conveyor and the particulate material while the other ones are scattered to the conveyor through a speed reducing filter. CONSTITUTION:High speed neutron and gamma-ray which are emitted to a direction (a) from a radiation source 20 permeate a conveyor 24 and a particulate stock material 16 and counted by a neutron counter 34 and a gamma-ray counter 36 through a detector 28 while the counted values are inputted to an operation apparatus. On the other hand, high speed neutron and gamma-ray which are emitted to a direction (b) from the radiation source 20 irradiate the conveyor 24 through a neutron speed reducing filter and counted through a hot neutron detector 42 by a neutron counter 44 to calculate the water conversion mass thickness Mbw of the conveyor 24 while gamma-ray is counted through a detector 26 by a gamma-ray counter 40 to calculate the mass thickness Ma of the solid component of the conveyor 26. Herein, when the water conversion mass thickness of the hydrogen amount contained in the stock material 16 is set to Maw and the mass thickness of the solid component to Ma, the moisture content M of the stock material 16 is calculated by a formula M=MawX100/(Maw+Ma).