我们研制的穿透式γ射线密度计(简称密度计)采用了~(137)Csγ射线放射源,其原理方框图如图1所示。 图1 密度计方框图 ~(137)Cs放射出的γ射线穿过被测管道内厚度为D、密度为ρ的矿浆后,入射到探测器上强度为I,当管道内为空气时,探测器上的射线强度为I_0。则: I=I_0e~((-μ)_mρD) (1)式中μ_m为质量吸收系数。 测量对象为选矿厂磨矿系统分级机溢流浓度或密度。分级机溢流,由水和粉末矿石组成,所以固体重量 We developed penetrating γ-ray density meter (referred to as the density meter) using ~ (137) Csγ-ray radiation source, the principle block diagram shown in Figure 1. Fig.1 The block diagram of densitometer ~ (137) The γ-ray emitted by Cs passes through the pulp with the thickness D and density ρ in the pipe to be measured and enters the detector with intensity I. When the pipe is air, the detector The intensity of the beam is I_0. Then: I = I_0e ~ ((- μ) _mρD) (1) where μ_m is the mass absorption coefficient. Measuring objects for ore dressing plant classifier overflow concentration or density. Grader overflow, composed of water and powder ore, so the weight of solids