METHOD FOR METAL LEACHING

摘要

(57) Abstract: A method for metal leaching comprises contacting a granulated metal- containing material with an aqueous solution of chemical reagents in a pipe reactor, the metal-containing material and the aqueous solution of chemical reagents being delivered to the pipe reactor from its bottom in a continuous direct flow. The resultant pulp from the metal-containing material and the aqueous solution of chemical reagents is passed through the pipe reactor from the bottom upwards, simultaneously being subjected to ultrasonic field treatment. The ultrasonic field is created by a multiplicity of ultrasonic wave sources, located in the pipe reactor in a helical line with an axis coinciding with the pipe reactor axis, and the said ultrasonic wave sources are in equal distances from each other, thus ensuring an average ultrasound specific volume power W/Q of1 to1O kW/m3.