公开(公告)号：WO2022043601A1

公开(公告)日：2022-03-03

申请号：PCT/FI2020/050559

申请日：2020-08-28

Applicant: METSO OUTOTEC FINLAND OY

Inventor： JANSSON, Kaj ,  SAARI, Eija

IPC: C02F1/24 ,  C02F1/52 ,  B03D1/001 ,  B03D1/02 ,  B03D1/14 ,  B03D103/02 ,  C02F101/10 ,  C02F103/10 ,  C02F103/16

Abstract: The specification relates to a method for improving a mineral flotation process. The method comprises adding coagulant(s) and/or flocculant(s) and/or flotation chemical(s) to an aqueous stream (100, 200a, 300a, 400b) of a minerals processing plant in order to facilitate formation of flocs including colloidal particles comprising electrochemically active metal(s), and in order to form a treated aqueous stream (101, 201, 301, 401), subjecting the treated aqueous stream (101, 201, 301, 401) to cleaning flotation in order to separate at least some of the colloidal particles comprising electrochemically active metal(s) and at least some of the microbes contained by the treated aqueous stream (101, 201, 301, 401) as a cleaning flotation overflow (103, 203, 303, 403) and in order to form a cleaning flotation underflow (104, 204, 304, 404), removing the cleaning flotation overflow (103, 203, 303, 403), and utilizing at least part of the cleaning flotation underflow (104, 204, 304, 404) as process water in minerals processing. The cleaning flotation comprises gas bubbles, at least 90 % of the gas bubbles having a diameter of from 0,2 to 250 µm.

公开(公告)号：WO2021255325A1

公开(公告)日：2021-12-23

申请号：PCT/FI2020/050438

申请日：2020-06-17

Applicant: METSO OUTOTEC FINLAND OY

Inventor： JANSSON, Kaj ,  SAARI, Eija

IPC: B03D1/02 ,  C02F1/24 ,  C02F1/52 ,  B03D103/02 ,  C02F101/10 ,  C02F103/10

Abstract: A method for removing soluble and/or colloidal Si-compounds from an aqueous stream (100, 200a, 300a, 400b) of a minerals processing plant is provided. The method comprises: adding coagulant(s) and/or flocculant(s) and/or flotation chemical(s) to the aqueous stream (100, 200a, 300a, 400b) in order to facilitate formation of flocs comprising at least some of the Si- compounds, and in order to form a treated aqueous stream (101, 201, 301, 401), subjecting the treated aqueous stream (101, 201, 301, 401) to cleaning flotation in order to separate at least some of the Si-compounds as a cleaning flotation overflow (103, 203, 303, 403), and removing the cleaning flotation overflow (103, 203, 303, 403). The cleaning flotation comprises gas bubbles, at least 90 % of the gas bubbles having a diameter of from 0,2 to 250 µm.

公开(公告)号：WO2020089506A1

公开(公告)日：2020-05-07

申请号：PCT/FI2018/050787

申请日：2018-10-29

Applicant: OUTOTEC (FINLAND) OY

Inventor： JANSSON, Kaj

IPC: B03D1/02 ,  B03D1/14 ,  C02F1/24 ,  C02F1/60 ,  B03B7/00

Abstract: A method for treating process water of a flotation arrangement (1) is disclosed. The process comprising the steps of a) dewatering overflow of a mineral flotation circuit (10) in a gravitational solid-liquid separator (21) to separate a sediment (212) from a supernatant (211) comprising water, silica-containing particles and soluble SiO 2 , fine particles, microbes, and residual flotation chemicals; b) subjecting the supernatant (211) to cleaning flotation, in which at least 90 % of the flotation gas bubbles have a size from 0,2 to 250 μm, in a cleaning flotation unit (23) for collecting at least silica-containing particles, for separating at least silica-containing particles from the supernatant into cleaning flotation overflow (232), and for forming purified process water (231) as cleaning flotation underflow; c) removing cleaning flotation overflow (232) as tailings; and d) recirculating purified process water (231) into the mineral flotation circuit (10). A process water treatment arrangement (20) is also disclosed.

公开(公告)号：WO2020169873A1

公开(公告)日：2020-08-27

申请号：PCT/FI2019/050125

申请日：2019-02-18

Applicant: OUTOTEC (FINLAND) OY

Inventor： JANSSON, Kaj

IPC: B03D1/02 ,  B03D1/14 ,  B03B7/00 ,  C02F1/24 ,  C02F1/60 ,  B03D103/02

Abstract: In a method for removing Si based compounds from a leaching liquor, the method comprises supplying the leaching liquor (2) from a leaching step (1) to a gravitational solid-liquid separator (3) for separating an overflow (4) and an underflow (15), supplying an overflow (4) from the gravitational solid-liquid separator (3) to a reactor (6) for forming a treated liquor (9), adding a source of aluminium (5) as a first coagulant to the overflow (4) in the reactor (6) for forming aluminium silicate containing particles in the treated liquor (9), adding at least a flocculant (7) to the treated liquor (9) after the reactor (6) for increasing particle size of the aluminium silicate containing particles, and supplying the treated liquor (9) to cleaning flotation in which at least 90 % of the flotation gas bubbles display a size from 0.2 to 250 pm in a cleaning flotation unit (10) for collecting at least the aluminium silicate containing particles, for separating at least the aluminium silicate containing particles from the treated liquor (9) into a cleaning flotation overflow and for forming a purified liquor (11) as a cleaning flotation underflow.

公开(公告)号：WO2020128137A1

公开(公告)日：2020-06-25

申请号：PCT/FI2018/050943

申请日：2018-12-18

Applicant: OUTOTEC (FINLAND) OY

Inventor： JANSSON, Kaj

IPC: B03D1/02 ,  B03D1/14 ,  B03B7/00 ,  C02F1/24 ,  C22B3/20 ,  C22B11/00 ,  C22B26/12 ,  B03D103/02 ,  C02F103/16

Abstract: A method of treating process water of a flotation plant (1) is disclosed. The flotation plant (1) comprises a mineral flotation line (10) and a process water circuit (20) for treating underflow and/or overflow of the flotation line. The process water circuit comprises a gravitational solid-liquid separator (21) for dewatering underflow and/or overflow of the mineral flotation line to separate sediment (212) from supernatant (211) comprising at least water and unrecovered fine particles comprising valuable material; and a recover water tank (25) for collecting process water (500). According to the method, prior to leading supernatant (211) from the gravitational solid-liquid separator (21) into the recover water tank (25), it is subjected to cleaning flotation, in which at least 90 % of the flotation gas bubbles have a size from 0,2 to 250 µm, in a cleaning flotation unit (23). An arrangement for treating process water of a flotation plant, and its use arealso disclosed.

公开(公告)号：WO2021084155A1

公开(公告)日：2021-05-06

申请号：PCT/FI2019/050768

申请日：2019-10-28

Applicant: OUTOTEC (FINLAND) OY

Inventor： JANSSON, Kaj

IPC: B03D1/02 ,  C02F1/24 ,  B03B7/00 ,  C22B15/00 ,  C22B23/00 ,  B03D103/02 ,  C02F103/16

Abstract: A method for treating process water of a flotation arrangement (1) is disclosed, the flotation arrangement comprising flotation arrangement (1) comprising a mineral flotation line (10) and a process water treatment arrangement (20) for treating underflow of the mineral flotation line. The method comprises the steps of a) dewatering underflow from the flotation in a gravitational solid-liquid separator (21); b) subjecting supernatant (221) from step a) to cleaning flotation for collecting at least fine particles and residual flotation chemicals, for separating at least fine particles and residual flotation chemicals from the supernatant into cleaning flotation overflow (232), and for forming purified process water (231) as cleaning flotation underflow; c) removing cleaning flotation overflow (232) as tailings, and d) recirculating purified process water (231) into the mineral flotation line (10).

公开(公告)号：WO2018050950A1

公开(公告)日：2018-03-22

申请号：PCT/FI2016/050639

申请日：2016-09-14

Applicant: OUTOTEC (FINLAND) OY

Inventor： JANSSON, Kaj ,  RUONALA, Mikko ,  KOTIRANTA, Tuukka

IPC: C22B11/00 ,  C22B7/00 ,  B03D1/02 ,  C22B3/20 ,  B03D1/14

Abstract: The present invention relates to a method for recovering at least one precious metal from an aqueous solution containing said metal and particularly to recovery of silver and optionally one or more other precious metals from overflow of a sedimentation unit such as a thickener, a clarifier or a pond.

Abstract translation: 本发明涉及从含有所述金属的水溶液中回收至少一种贵金属的方法，特别涉及从沉淀单元的溢流中回收银和任选的一种或多种其它贵金属的方法， 作为增稠剂，澄清剂或池塘。