Dynamic desorption process for gold-loaded carbon

Abstract

The invention discloses a dynamic desorption process for gold-loaded carbon, which comprises the following steps that: the gold-loaded carbon is in a loose suspension state when desorption solution flows by further to form a liquid-solid two-phase circulating fluidized bed; and in the dynamic desorption of the fluidized bed, when gold-loaded carbon particles at the axial central part of a desorption device overturn up and down, the gold-loaded carbon particles constantly move upwards under the action of the driving speed of the desorption solution, flow around and flow downwards along the circumferential wall of the desorption device when the gold-loaded carbon particles flow to the top, namely a highest interface of the fluidized bed due to the action of fluid resistance, are gathered into a central desorption solution inlet through the conical bottom when the gold-loaded carbon particles reach the bottom, flow upwards again to perform another cycle and repeat the process again and again to form the dynamic desorption of circulating fluidization. The process ensures that: the gold-loaded carbon particles perform various processes in a flow state; the whole desorption device is inan isothermal and uniform state compared with the conventional static desorption; and the mass transfer and heat transfer rates between the desorption solution and the carbon particles are large, which all strengthen the desorption chemical reaction process. The dynamic desorption of the gold-loaded carbon is more efficient than the static desorption, and desorption time is shortened.

Description

technical field [0001] The invention relates to a new technology for desorption of gold-loaded carbon in gold mines, in particular to a dynamic desorption technology for gold-loaded carbon. Background technique [0002] The gold-loaded carbon desorption processes currently used in the market and mines are divided into three categories according to temperature and pressure: normal pressure and normal temperature desorption electrolysis, high temperature and medium pressure desorption electrolysis, and high temperature desorption low temperature electrolysis. However, the gold-loaded carbon in all processes is in a static state during the entire desorption process in the desorption device (that is, the desorption column). [0003] The gold-loaded carbon is static in the desorption column, and the desorption liquid flows through it, resulting in a certain channel flow. The desorption liquid cannot flow through the gold-loaded carbon evenly, so the desorption is uneven, and the ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a dynamic desorption process for gold-loaded carbon in order to solve the problems of channeling and uneven desorption in the existing gold-loaded carbon desorption process

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