Ultrasonic Vortex Reactor
Ultrasonic Vortex Reactor intensifies chemical processes in liquid-gas, liquid-solid and gas-solid media. Using the Vortex Reactor, non-aggressive technological processes of oxidation and leaching of metals from refractory ores are possible, where all other technologies are not cost-effective. We have developed a technology for the oxidation of sulfides at atmospheric pressure and ambient temperature, as well as the further extraction of polymetals or precious metals by centrifugal concentrators without the use of cyanides.
The advantage of the proposed method is that in the field of the centrifugal forces of the vortex, under the action of which the dispersed material or liquid moves, local regions of increased and lower pressures are created, as a result of which the mixing of various media at submicron sizes occurs.
Local areas of high and low pressures are created in the volume of the grinding chamber due to the emission of ultrasonic waves into its cavity. As a result, the particle trajectory and their angular velocity change, leading to an increase in the collision frequency.
In this case, the collision energy does not have time to dissipate, which leads to the accumulation of energy in the volume of the particles and their transition to an elastic-stressed state. Upon reaching the critical limit of this state, the particles are destroyed. In addition, due to the formation of the ultrasonic waves field in the cavity of the grinding chamber, resonance absorption of the ultrasonic waves energy by the particles takes place with the simultaneous action of a periodic alternating load as they pass the areas of relative discharge and increased pressures. This contributes to the multiplication and growth of micro-defects of the internal structure of particles and their destruction.
Generated ultrasonic oscillations of different frequencies, contribute to an increase in the uniformity of the dispersed composition of the target products. Absorption of acoustic energy by particles of different sizes occurs at different resonant frequencies. This is due to the fact that high-frequency radiation is better absorbed by small particles, and small frequencies are better absorbed by small particles. A wide frequency range of ultrasonic waves oscillations ensures the absorption of wave energy by all particles.
Thus, the novelty of the device under consideration is not only the simultaneous action of a vortex flow, acoustic waves, sudden pressure drops, interaction of high speed individual fragments of material with each other, but also that all processes are aggregated into one device and do not require additional generation acoustic waves and dynamic accelerators. The grinding and mixing process takes place in a very short period of time with the formation of a fraction of the disintegrated material (mainly) in the range of less than 10 μm.
The plants under consideration are applicable both for the processing of bulk components and for processes with liquid-solid, liquid-liquid, liquid-gas systems. This feature greatly expands the scope of the device. The results of the vortex reactor tests during the processing of loose components and liquid-solid systems confirmed the possibility of using the apparatus for obtaining homogeneous fine-dispersed products. Use in liquid-liquid systems allows to obtain homogeneous emulsions of almost any substances.
With the installation of the vortex reactor, the lowest energy consumption is achieved in comparison with other methods.
TECHNICAL CHARACTERISTICS OF THE VORTEX REACTOR
Model VR2500 VR150
Air consumption, m3/min 5-20 1-2
Air pressure,bar 6,0-8,0 1,0-2,0
Air substitute Steam, any gas
Method of operation continuos
Aggregate state of the feed material Liquid-solid, air-solid
Processing time of material in chamber ,с 0,5-1,0
Air concumtion on 1 kg of material, m3/kg 0.5
Size of raw material particles,mm 0-10
Fraction yield less than 10 μm,% 80
Performance, per hour:
- dry,kg 2500 150
-pulp, suspension ,m3 10-12 0.6-0.7
The hardness of processing material
on the Mohs scale, 1-9
Dimensions of the grinding unit, cm 20х20х20 10x12x15
Weight, kg 13.0 5.0