Vertical symmetrical vibrating mill

A method for grinding a substance, comprising the steps of:

• providing a vertical symmetrical vibrating mill, the vertical symmetrical vibrating mill including a top vibrating tube and a bottom vibrating tube, the top vibrating tube and the bottom vibrating tube being connected so as to form a single vibrating body that is at least one of supported and suspended via a support element, wherein the top vibrating tube and the bottom vibrating tube are located on opposite sides of a reference plane of symmetry, and wherein the top vibrating tube and the bottom vibrating tube each have a common axis that is perpendicular to the reference plane of symmetry, the vertical symmetrical vibrating mill also including a plurality of exciter elements including at least one exciter element connected to each of the top vibrating tube and the bottom vibrating tube, each one of the plurality of exciter elements configured to cause an excitation in a direction that is substantially tangential to the vibrating tubes, each one of the plurality of exciter elements configured to at least one revolve and oscillate at the same synchronized frequency;
• placing the substance into at least one of the top vibrating tube and the bottom vibrating tube;
• exciting the plurality of exciter elements by providing an amount each one of the exciter elements that is proportional to a distance between the exciter element and the reference plane of symmetry such that grinding media stored in the at least one of the top vibrating tube and the bottom vibrating tube grinds the substance.