Kabushiki Kaisha Toshiba

Hirofumi Noguchi

Atsushi Yamazaki

Taro Fukaya

Kenji Tsutsumi

Shuji Seki

Ichiro Yamanashi

Yasutaka Kikuchi

Nobuyuki Ashikaga

Atsushi Yukawa

Takashi Menju

Hiromi Tsukui

Shinji Oono

Ryoichi Arimura

According to one embodiment, a copper recovery apparatus includes a precipitation tank, a mixing tank, a filter-aid feeder, a solid-liquid separator includes a filter, a cleaning-water supply line, a cleaning-water discharge line, a separation tank, and a filter-aid return line. The precipitation tank is configured to receive copper ions-containing water to be treated and an alkali to prepare treated water containing a precipitate of copper compound. The solid-liquid separator is configured to allow the treated water to be passed through the filter on which the precoat layer is deposited to separate the precipitate retained on the precoat layer from a filtrate.

Copper recovery apparatus

According to one embodiment, a copper recovery apparatus includes a precipitation tank configured to precipitate copper hydroxide grains in water, a filter aid supplier, a mixing tank configured to mix the filter aid with a water to produce a suspension, a separator provided with a filter, a line configured to supply the suspension to the separator, thereby forming a precoat layer formed of the filter aid on the filter, a separation tank configured to receive the detached matter of the precoat layer discharged together with the detaching water from the separator to magnetically separate copper hydroxide grains and filter aid, a line configure to discharge and recover the detaching water from the separation tank, and a line configured to return the separated filter aid to the filter aid supplier from the separation tank.

Copper recovery apparatus and copper recovery method

A solid-liquid separator that separates raw water containing suspended solids into suspended solids (solid) and treated water (liquid) in easy and a short time is provided. A solid-liquid separator includes a separation tub, an inflow pipe configured to rotate raw water which flowed from the outlet of the inflow pipe in the separation tub, a froth discharge pipe configured to discharge the suspended solids surfaced in the separation tub and a treated water discharge pipe configured to discharge treated water by which the suspended solids were removed from raw water from the separation tub.

Solid-liquid separator

A former () works, when supplied with wastewater containing heavy metals and hydrogen sulfide, to react heavy metals contained in wastewater with hydrogen sulfide to form sulfide salts, an acquirer () works, when supplied with sulfide salts and acid, to acquire hydrogen sulfide and heavy metal ions produced by reactions between sulfide salts and acid, a hydrogen sulfide supply line () supplies hydrogen sulfide acquired by the acquirer to the former, and a collection line () collects heavy metal ions.

Heavy metal collection system

Growing community of inventors

Sakai, Japan

Hirofumi Noguchi