A simulation device for analyzing behavior of a granular material that includes a plurality of particles, the simulation device comprising: a first parameter acquisition unit that acquires a first parameter including a parameter relating to the granular material, wherein the first parameter is selected from particle size, particle number, Young's modulus, time step of calculation, Poisson's ratio, friction coefficient with wall surface, friction coefficient between particles, rolling friction coefficient, density, and the like; a second parameter calculation unit that calculates a second parameter, when a particle group including the plurality of particles is coarsely viewed to form a single coarse-view particle, the second parameter relating to the coarse-view particle and wherein the second parameter is selected from thermal conductivity, the coefficient of restitution, the coefficient of friction and the coefficient of rolling friction; and a coarse-view particle behavior analysis unit that analyzes a behavior of the coarse-view particle based on the first parameter and the second parameter, wherein the behavior of the coarse-view particle is selected from movement in the kiln, temperature change, temperature distribution and average temperature, wherein the second parameter calculation unit calculates the second parameter by using a solution of a characteristic equation using a relationship between an elastic energy of the particle group and an elastic energy of the coarse-view particle, assuming that a center of gravity and an elastic energy are same between the particle group and the coarse-view particle or for rotational motion the angular momentum and rotational energy coincide before and after coarse-viewing, and wherein, based on the result of the behavior of the granular material obtained by the simulation, granular material of the desired physical properties can be supplied from a granular material supply device and further heated in a reaction furnace under prescribed heating conditions to increase the reaction rate of the granular material. a first parameter acquisition unit that acquires a first parameter including a parameter relating to the granular material, wherein the first parameter is selected from particle size, particle number, Young's modulus, time step of calculation, Poisson's ratio, friction coefficient with wall surface, friction coefficient between particles, rolling friction coefficient, density, and the like; a second parameter calculation unit that calculates a second parameter, when a particle group including the plurality of particles is coarsely viewed to form a single coarse-view particle, the second parameter relating to the coarse-view particle and wherein the second parameter is selected from thermal conductivity, the coefficient of restitution, the coefficient of friction and the coefficient of rolling friction; and a coarse-view particle behavior analysis unit that analyzes a behavior of the coarse-view particle based on the first parameter and the second parameter, wherein the behavior of the coarse-view particle is selected from movement in the kiln, temperature change, temperature distribution and average temperature, wherein the second parameter calculation unit calculates the second parameter by using a solution of a characteristic equation using a relationship between an elastic energy of the particle group and an elastic energy of the coarse-view particle, assuming that a center of gravity and an elastic energy are same between the particle group and the coarse-view particle or for rotational motion the angular momentum and rotational energy coincide before and after coarse-viewing, and wherein, based on the result of the behavior of the granular material obtained by the simulation, granular material of the desired physical properties can be supplied from a granular material supply device and further heated in a reaction furnace under prescribed heating conditions to increase the reaction rate of the granular material.