CN115007312A - Iron tailings and red mud electrochemical iron and aluminum extraction silicate removal system - Google Patents

Iron tailings and red mud electrochemical iron and aluminum extraction silicate removal system Download PDF

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Publication number
CN115007312A
CN115007312A CN202210548201.XA CN202210548201A CN115007312A CN 115007312 A CN115007312 A CN 115007312A CN 202210548201 A CN202210548201 A CN 202210548201A CN 115007312 A CN115007312 A CN 115007312A
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electrochemical
iron
lead oxide
metallic tin
electrode
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许裕金
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • B03C1/02Magnetic separation acting directly on the substance being separated
    • B03C1/30Combinations with other devices, not otherwise provided for
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

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Abstract

The invention provides an iron tailing and red mud electrochemical iron and aluminum extracting and silicate removing system which is provided with a permanent magnet cylinder, a transmission device, an ore feeding pipe and a separation tank body, the magnetic system and the magnetic system adjusting device comprise a frame, and are provided with a pulse power supply (1), an electrochemical lead oxide anode electrode (9), an electrochemical porous metallic tin cathode electrode (10), the electrochemical lead oxide anode electrode (9) and the electrochemical porous metallic tin cathode electrode (10) are arranged between a permanent magnet cylinder (2) and a separation tank body (5), the interval between the electrochemical lead oxide anode electrode (9) and the electrochemical porous metallic tin cathode electrode (10) is 15cm, the electrochemical lead oxide anode electrode (9), the electrochemical cathode electrode (10) and the separation tank body (5) are respectively separated by an insulating material (11), and an aluminum concentrate discharge port (12) is arranged between the electrochemical lead oxide anode electrode (9) and the electrochemical porous metallic tin cathode electrode (10). The method can obtain low silicon dioxide content and high iron and aluminum recovery rate for tailings containing high silicate iron and red mud, and solves the problem of poor iron and aluminum extraction effect on fine iron ores and red mud in the prior art.

Description

Iron tailings and red mud electrochemical iron and aluminum extraction silicate removal system
One, the technical field
The invention provides an iron tailing and red mud electrochemical iron and aluminum extracting and silicate removing system, and belongs to the technical field of mineral separation.
Second, background Art
The recycling of iron tailings and red mud resources is an important project beneficial to environmental protection and national economic development. However, the iron tailings and the red mud usually contain a large amount of silicate impurities, and the presence of the silicate impurities has adverse effects on the recleaning utilization of the iron tailings and the red mud iron separation and the improvement of the iron concentrate grade, so that the silicate content in the iron tailings and the red mud substances must be greatly reduced, and the iron and aluminum concentrate grade of the iron tailings and the red mud recleaning is improved.
One common process for removing silicates from iron tailings and the recleaning iron and aluminum of red mud is the froth reverse flotation and magnetic separation process, where the flotation silicates are enriched in froth and the iron-containing iron ore concentrate of interest is present in the reverse flotation equipment bottom fraction.
A large amount of iron-containing silicate ores cannot be utilized in China, and except for an oxidation roasting method with extremely high energy consumption and no economic value, an economic and environment-friendly ore dressing technology for separating iron from silicate is not available so far.
Various reverse flotation reagents and equipment and magnetic separation equipment are proposed in the prior art to improve the recovery rate of iron and aluminum and reduce the level of silicon dioxide. These anti-flotation agent solutions typically involve grinding the ore to fine particles, and when the ore is ground very finely to sufficiently dissociate the minerals, anti-flotation problems occur with the froth structure in anti-flotation, and the fine particle minerals adversely affect the froth volume generation and froth stability and anti-flotation performance.
The flotation reagents of the existing flotation technology have single functions, and particularly, iron silicate and iron can not be separated and floated for iron ore containing iron silicate, so that a large amount of iron ore containing iron silicate in China can not be utilized.
Red mud is produced in the industrial production process of alumina, and is named as red or brown because iron, titanium and other impurities in ores are insoluble in most silicon to form solid waste slag. The red mud dam has the characteristics of fine granularity, complex composition, radioactivity and strong alkalinity, is very easy to cause a series of environmental problems such as soil alkalization, underground water pollution, atmospheric pollution, radioactive pollution and the like, and has the risk of red mud dam collapse. Meanwhile, the red mud contains iron, aluminum, titanium, sodium and various rare earth elements, and is a precious secondary resource.
The existing red mud treatment modes have great safety worry and mainly comprise the following aspects: firstly, the sea filling of the red mud can lead alkaline waste liquid, heavy metal ions and radioactive elements in the red mud to enter the ocean, thus destroying the ecological balance of the ocean; secondly, due to long-time piling up of the red mud, a series of problems such as soil alkalization, groundwater pollution and the like can be caused, and damage is caused to local agriculture and fishery production; thirdly, the surface layer of the dried red mud is easy to peel off, dust is raised, the dust content of the atmosphere is increased, and the atmosphere pollution is caused; fourthly, the existence of radioactive elements in the red mud can harm the healthy growth of surrounding animals and plants; fifthly, the construction of the red mud dam not only occupies land resources, but also along with the continuous increase of the red mud stockpile, the maintenance cost of the red mud yard is increased day by day, and the dam break risk is easy to occur, so the technology for recycling the red mud is important,
third, the invention
The invention aims to provide an iron tailing and red mud electrochemical iron and aluminum extracting and silicate removing system aiming at the defects of the prior art, and overcomes the defect of poor flotation or magnetic separation effect of the prior art on the micro weak magnetic iron tailings and the red mud. The invention forms an iron tailing and red mud electrochemical iron and aluminum extracting and silicate removing system by using and specifically combining equipment components, and performs electrochemical and magnetic separation combination on ores to extract iron and aluminum and remove silicate. The combined system is found to be capable of obtaining low silicon dioxide content and high iron-aluminum recovery rate for the iron tailings containing high silicate and the red mud, and solves the problem of poor iron-aluminum extraction effect for the fine iron ore and the red mud in the prior art, and the iron tailings and red mud electrochemical iron-aluminum extraction silicate removal system comprises:
the electrochemical anode electrode, the electrochemical cathode electrode, the pulse power supply, the cylinder, the magnetic system, the tank body and the like.
In order to achieve the purpose, the invention provides the following technical scheme:
an iron tailings and red mud electrochemical iron and aluminum extraction silicate removal system is characterized in that: the electrochemical cell consists of six main parts, namely an electrochemical anode electrode, an electrochemical cathode electrode, a pulse power supply, a cylinder, a magnetic system, a cell body and the like. The electrochemical anode electrode is a lead oxide anode electrode, the electrochemical cathode electrode is a porous metallic tin cathode electrode, a pulse power supply is arranged, the electrochemical lead oxide anode and the electrochemical porous metallic tin cathode are arranged between the permanent magnet cylinder and the separation tank body, the electrochemical anode and the electrochemical cathode are separated by 15cm, and the electrochemical anode, the electrochemical cathode and the separation tank body are respectively separated by insulating materials. An aluminum concentrate discharge port is arranged between the electrochemical anode (9) and the electrochemical cathode (10).
The using method comprises the following steps: the iron tailing granularity of 74um accounts for 95-100%, the ore pulp concentration is 21-36%, the cylinder motor is started, ore pulp is fed, when the ore pulp flows out of the system, the electrochemical power supply is started, the ore pulp is continuously fed into the system, and the ore pulp is subjected to electrochemical magnetic separation. The cylindrical magnetic adsorption is iron ore, aluminum ore is discharged between the cathode and the anode, and impurity tailings such as silicate are discharged from the bottom of the system.
Compared with the existing permanent magnet machine, the permanent magnet machine has the following advantages after adopting the technical scheme:
1. under the action of a pulse electric field, the lead oxide anode electrode generates protonized acid in ore pulp to ionize iron minerals in advance, and meanwhile, the lead oxide anode electrode has extremely strong ionization lattice dispersion effect on a combination of gangue and iron, so that the aim of removing silicate dissociation combined with iron ore is fulfilled. The porous metal tin cathode electrode has good reduction effect on iron dispersed in ionized lattices to enhance the magnetism of the iron ore, and then the iron ore with good magnetism is magnetically separated by using a specific magnetic field to fully separate the iron from the silicate gangue, so that the historical problem that the silicate iron ore cannot be used is solved.
2. Due to the synergistic function of the combined system, the selective separation of iron minerals is improved, the recovery rate and the grade of iron ore concentrate are improved, aluminum is fully recovered, and the problems of impurities, poor selectivity, poor magnetic separation and flotation effect on micro weak magnetic iron ore, or foam stickiness and ore concentrate impurities in the existing magnetic separation and foam reverse flotation are solved.
3. The manufacturing method of the lead oxide anode electrode and the metallic tin cathode electrode comprises the following steps:
taking a metal lead plate with the area of 10cm multiplied by 16cm as an anode, taking a metal tin plate with the area of 10cm multiplied by 16cm as a cathode, inserting the metal lead plate and the metal tin plate into a plastic electrolytic tank with the volume of 1000 ml, wherein the distance between the anode and the cathode is 10cm, the metal lead plate is connected with the anode of a direct current power supply, the metal tin plate is connected with the cathode of the direct current power supply, 600 plus 800 ml of 10-15% sodium hypochlorite solution is added into the plastic electrolytic tank with the volume of 1000 ml as an electrolyte, and direct current is electrified into the electrolytic tank, wherein the current density is 16mA/cm 2 -36mA/cm 2 The forward electrification and the reverse electrification are carried out for 15 to 30 minutes and 1 to 3 minutes each time, and the forward electrification and the reverse electrification are carried out to obtain the productThe positive electrode and the negative electrode of the power supply are exchanged, and the electrolytic oxidation and reduction are repeated for 3 to 6 hours, so that a layer of lead oxide is formed on the surface of the metal lead, namely the lead oxide anode. And forming a porous metallic tin layer on the surface of the metallic tin, namely the metallic tin cathode electrode.
Description of the drawings
FIG. 1 is a schematic view of the front view of a system for electrochemically extracting iron and aluminum from iron tailings and red mud and removing silicate according to the present invention.
Fig. 2 is a sectional view taken along a-a in fig. 1.
Fifth, detailed description of the invention
In order to achieve the purpose of the invention, the iron tailings and red mud electrochemical iron and aluminum silicate extracting and removing system is described in more detail below by combining the attached drawings and a using method.
As can be seen from a schematic view of a system for electrochemically extracting iron and aluminum and removing silicate from red mud shown in figure 1 and combined with figure 2, the system for electrochemically extracting iron and aluminum and removing silicate from iron tailings and red mud comprises a pulse power supply (1), a permanent magnet cylinder (2), a transmission device (3), an ore feeding pipe (4), a separation tank body (5), a magnetic system (6), a magnetic system adjusting device (7), a frame (8), an electrochemical lead oxide anode electrode (9) and an electrochemical porous metallic tin cathode electrode (10), wherein the permanent magnet cylinder (2) is arranged in the separation tank body (5), the electrochemical lead oxide anode electrode (9) and the electrochemical porous metallic tin cathode electrode (10) are arranged between the permanent magnet cylinder (2) and the separation tank body (5), the electrochemical lead oxide anode electrode (9) and the electrochemical porous metallic tin cathode electrode (10) are separated by 15cm, an electrochemical lead oxide anode electrode (9), an electrochemical porous metallic tin cathode electrode (10) and a separation tank body (5) are respectively isolated by an insulating material (11), an aluminum concentrate discharge port (12) is arranged between the electrochemical lead oxide anode electrode (9) and the electrochemical porous metallic tin cathode electrode (10), a tailing discharge port (13) is arranged at the bottom of the separation tank body (5), an iron concentrate flushing port (14) is arranged at the upper part between the electrochemical lead oxide anode electrode (9) and the permanent magnet cylinder body (2), an iron concentrate reverse flushing port (15) is arranged at the upper part of the separation tank body (5), a magnetic system (6) is arranged at the lower part in the permanent magnet cylinder body (2), and an iron concentrate discharge port (16) is arranged at one side of the separation tank body (5).
The use method of the iron tailings and red mud electrochemical iron and aluminum extraction silicate removal system comprises the following steps: the iron tailing granularity of 74um accounts for 95-100%, the ore pulp concentration is 21-36%, the cylinder motor is started, ore pulp is fed, when the ore pulp flows out of the system, the pulse power supply is started, the ore pulp is continuously fed into the system, and the electrochemical magnetic separation ore dressing is carried out on the ore pulp. The cylindrical magnetic adsorption is iron ore, aluminum ore is discharged between the electrochemical lead oxide anode electrode and the electrochemical porous metal tin cathode electrode, and impurity tailings such as silicate are discharged from a tailing discharge port (13).

Claims (3)

1. An iron tailings and red mud electrochemical iron and aluminum extraction silicate removal system is characterized in that: the magnetic separation device is provided with a permanent magnet cylinder (2), a transmission device (3), an ore feeding pipe (4), a separation tank body (5), a magnetic system (6), a magnetic system adjusting device (7) and a rack (8), wherein the magnetic system (6) is arranged at the lower part in the permanent magnet cylinder (2), a tailing discharge port (13) is arranged at the bottom of the separation tank body (5), an iron concentrate reverse flushing port (15) is arranged at the upper part of the separation tank body (5), and an iron concentrate discharge port (16) is arranged at one side of the separation tank body (5).
2. The system for electrochemically extracting iron and aluminum and removing silicate from iron tailings and red mud according to claim 1, which is characterized in that: the device is provided with a pulse power supply (1), an electrochemical lead oxide anode electrode (9) and an electrochemical porous metallic tin cathode electrode (10), wherein the electrochemical lead oxide anode electrode (9) and the electrochemical porous metallic tin cathode electrode (10) are arranged between a permanent magnet cylinder (2) and a separation tank body (5), the interval between the electrochemical lead oxide anode electrode (9) and the electrochemical porous metallic tin cathode electrode (10) is 15cm, the electrochemical lead oxide anode electrode (9), the electrochemical porous metallic tin cathode electrode (10) and the separation tank body (5) are respectively separated by an insulating material (11), an aluminum concentrate discharge port (12) is arranged between the electrochemical lead oxide anode electrode (9) and the electrochemical porous metallic tin cathode electrode (10), an iron concentrate flushing port (14) is arranged at the upper part between the electrochemical lead oxide anode electrode (9) and the permanent magnet cylinder (2), and an iron concentrate flushing port (14) is arranged between the electrochemical lead oxide anode electrode (9) and the electrochemical porous metallic tin cathode electrode (10) An aluminium concentrate discharge outlet (12).
3. The iron tailings and hematite as claimed in claim 1Mud electrochemistry is carried iron aluminium and is removed silicate system, its characterized in that: a method for preparing anode electrode of lead oxide and cathode electrode of metallic tin includes such steps as providing a metallic lead plate (10 cm × 16 cm) as anode, providing a metallic tin plate (10 cm × 16 cm) as cathode, inserting them in a plastic electrolyzer with 1000 ml volume, 10cm distance between anode and cathode, connecting metallic lead plate to positive electrode of DC power supply, connecting metallic tin plate to negative electrode of DC power supply, adding 800 ml of 10-15% sodium hypochlorite solution (600 ml) as electrolyte to the plastic electrolyzer with 1000 ml volume, and supplying DC current to electrolyzer with current density of 16mA/cm 2 -36mA/cm 2 Carrying out forward electrification for 15-30 minutes and then carrying out reverse electrification for 1-3 minutes each time, wherein the forward electrification and the reverse electrification are realized by exchanging positive and negative electrode ends of a power supply, and then carrying out repeated electrolytic oxidation reduction for 3-6 hours to form a layer of lead oxide on the surface of the metal lead, namely a lead oxide anode electrode; and forming a porous metallic tin layer on the surface of the metallic tin, namely a metallic tin cathode electrode.
CN202210548201.XA 2022-04-27 2022-04-27 Iron tailings and red mud electrochemical iron and aluminum extraction silicate removal system Withdrawn CN115007312A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115121370A (en) * 2022-06-08 2022-09-30 许裕金 Iron tailings and red mud electrochemical iron and aluminum extraction silicate removal system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2702780Y (en) * 2004-06-29 2005-06-01 冶金工业部马鞍山矿山研究院 Permanent magnetic pulsating field wet drum type magnetic separator
WO2015173506A1 (en) * 2014-05-13 2015-11-19 Marashi Mohamad Ali Method and device for the processing of ore containing ferromagnetic particles
CN108722663A (en) * 2018-06-15 2018-11-02 甘肃酒钢集团宏兴钢铁股份有限公司 A kind of iron ore drum-type wet separation device
CN108993770A (en) * 2018-07-27 2018-12-14 湖南农业大学 A kind of ore-dressing technique of fine grain teeth cloth silicate-type iron oxide ore
CN115121370A (en) * 2022-06-08 2022-09-30 许裕金 Iron tailings and red mud electrochemical iron and aluminum extraction silicate removal system
CN217512041U (en) * 2022-04-11 2022-09-30 许裕金 Iron tailings and red mud electrochemical iron and aluminum extraction silicate removal system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2702780Y (en) * 2004-06-29 2005-06-01 冶金工业部马鞍山矿山研究院 Permanent magnetic pulsating field wet drum type magnetic separator
WO2015173506A1 (en) * 2014-05-13 2015-11-19 Marashi Mohamad Ali Method and device for the processing of ore containing ferromagnetic particles
CN108722663A (en) * 2018-06-15 2018-11-02 甘肃酒钢集团宏兴钢铁股份有限公司 A kind of iron ore drum-type wet separation device
CN108993770A (en) * 2018-07-27 2018-12-14 湖南农业大学 A kind of ore-dressing technique of fine grain teeth cloth silicate-type iron oxide ore
CN217512041U (en) * 2022-04-11 2022-09-30 许裕金 Iron tailings and red mud electrochemical iron and aluminum extraction silicate removal system
CN115121370A (en) * 2022-06-08 2022-09-30 许裕金 Iron tailings and red mud electrochemical iron and aluminum extraction silicate removal system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115121370A (en) * 2022-06-08 2022-09-30 许裕金 Iron tailings and red mud electrochemical iron and aluminum extraction silicate removal system

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