| 摘要 |
PURPOSE:To measure the reduction rate of ore in a reducing furnace directly by measuring the number of neutron-capture gamma rays, the number of scattered gamma rays, or the number of transmitted gamma rays. CONSTITUTION:Charge iron ore 3 is irradiated with a hot neutron 2 from a neutron source 1. Neutron-capture gamma rays 5 emitted by the nuclear reaction between the hot neutron and an iron atom 4 enter a gamma-ray detector 6. Furter, gamma rays 8 emitted by a gamma-ray source 7 having a different energy band from the neutron-capture gamma rays 5 are scattered by the charge iron ore 5 to strike a gamma-ray detector 6. When the numbers of the neutron-capture gamma rays 5 and scattered gamma rays 9 per unit time which are deiscriminated by a crest value discriminator 10 are denoted as N1 and N2, the number (n) of iron atoms per unit volume and high density rho are calculated from N1 obtained previously by experiments, (n), rho, and the relation between N2 and rho. Those (n) and rho are used to calculate the reduction rate (r). In this case, K is the weight of an iron atom, W is the weight of impurities per ore unit weight, K.n0/rho0 is the iron weight per the iron ore unit weight of the charge and constant. |
