Copper recovery apparatus and copper recovery method

Abstract

According to one embodiment, a copper recovery apparatus includes a precipitation tank configured to make a drainage containing copper ions be alkalinity and precipitate copper hydroxide grains in water, a filter aid supplier for supplying an aid composed of magnetic particles or condensed matters and having an average diameter of 0.5 [mu]m to 20 [mu]m, a mixing tank configured to mix the filter aid with a water to produce a suspension, a solid-liquid separator(3) provided with a filter (33) of which the interior is divided into an upper space and a lower space, a suspension supplying line(L7,L2) configured to supply the suspension to the upper space of the separator from the precipitation tank and form a pre-coating layer composed of the aid on the filter, a processed water supplying lines (L2) making the processed water containing hydrogen copper oxide particles pass through the pre-coating layer and the filter via the separation tank and the solid-liquid separator to thereby capture the hydrogen copper oxide particles on the pre-coating layer and supply filtering liquid to the lower space; a peeling water supplying lines (L31,L11) for supplying a peeling water used for peeling the pre-coating layer from the filter to the upper space of the solid-liquid separator; a separation tank (4) configured to receive the detached matter of the pre-coating layer discharged together with the detaching water from the separator to magnetically separate copper hydroxide grains and filter aid, a copper recovery line (L8) configure to discharge and recover the detaching water containing the hydrogen copper oxide particles from the separation tank, and an aid returning line (L5) configured to return the separated filter aid to the filter aid supplier from the separation tank.

Description

[0001] This application is based on and claims priority from Japanese Priority Patent Application No. 2011-057130 filed on March 15, 2011, the entire contents of which are incorporated herein. technical field [0002] The embodiments described here relate to a copper recovery device and a copper recovery method for recovering copper present in water. Background technique [0003] Recently, effective use of water resources has been sought due to industrial development and population increase. Therefore, reuse of waste water such as industrial waste water is important. The reuse of wastewater requires water purification, that is, the need to separate other substances from the water. As a method for separating other substances from water, there are various methods such as a membrane separation method, a centrifugal separation method, an activated carbon adsorption method, an ozone treatment method, and a method of removing floating substances by coagulation. By using these me...

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Problems solved by technology

[0006] However, in the existing method, since the recovered copper precipitate / polymer aggregate itself contains a large amount of polymer, there is a problem that the copper purity per unit volume of the aggregate is low and the recovery efficiency of copper is low. point

In addition, since the amount of sludge (residue) remaining after separating copper from the aggregate is large, and the sludge is finally discarded, there is a problem that the amount of waste is large

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