Mineral dry density separation behavior (mineral beneficiation) involves segregation of high density particles and low density particles in the feed, i.e., in nutshell, mineral dry density beneficiation is density segregation in physics terms. In dry beneficiation, this density segregation is achieved using air as fluidized medium. Density segregation on dry separators can be achieved in two ways: (1) using minimum fluidization velocity differences and (2) using terminal velocity difference between different density particles. Dry separators based on minimum fluidization velocities follow two steps for dry beneficiation: (1) vertical density stratification and (2) horizontal segregation. Particles due to buoyancy, drag and gravitational forces get vertically density stratified and later frictional, gravity and external (vibrational, etc.) forces horizontally segregate different density particles. Dry separators based on terminal velocities follow single step for dry beneficiation of mineral, and air velocity in this type of dry density separators is maintained between terminal velocity of high density and low density particles. Velocity of air is higher for low density particles, which leads to higher drag and buoyancy forces to get pushed out of system with air and get collected at further distance than high density particles leading to density segregation. Mathematical models have been developed using force balance on particles and simulated in MATLAB for both type of separators to explain the physics of separation. Solutions to the simulated mathematical model equations are the particle trajectories of different density particles in the two dry separators. Iron ore is used as feed for studying separation futures in mathematical modeling on dry separators.

矿物干密度分离行为（矿物选矿）涉及进料中高密度颗粒和低密度颗粒的分离，也就是说，简而言之，矿物干密度选矿从物理角度讲是密度分离。在干法选矿中，使用空气作为流化介质可以实现这种密度分离。干分离器上的密度分离可以通过两种方式实现：（1）使用最小的流化速度差，以及（2）使用不同密度颗粒之间的最终速度差。基于最小流化速度的干式分离器遵循以下两个步骤进行干式选矿：（1）垂直密度分层和（2）水平分离。由于浮力，阻力和重力而产生的粒子在垂直方向上会分层分层，然后在摩擦，重力和外部（振动等）的情况下分层。）力水平隔离不同密度的粒子。基于最终速度的干式分离器遵循单一步骤进行矿物的选矿，并且这种类型的干密度分离器中的空气速度保持在高密度和低密度颗粒的最终速度之间。对于低密度颗粒，空气的速度较高，这导致较高的阻力和浮力与高密度颗粒相比，被空气推出系统并在更远的距离处被收集，从而导致密度分离。已经使用粒子上的力平衡开发了数学模型，并在MATLAB中对两种类型的分离器进行了仿真，以解释分离的物理原理。模拟的数学模型方程的解决方案是两个干燥分离器中不同密度颗粒的颗粒轨迹。