CN113462894A - Device and method for recovering nickel, copper and cobalt from nickel smelting water-quenched slag - Google Patents
Device and method for recovering nickel, copper and cobalt from nickel smelting water-quenched slag Download PDFInfo
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- CN113462894A CN113462894A CN202110619184.XA CN202110619184A CN113462894A CN 113462894 A CN113462894 A CN 113462894A CN 202110619184 A CN202110619184 A CN 202110619184A CN 113462894 A CN113462894 A CN 113462894A
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- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 179
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 88
- 239000002893 slag Substances 0.000 title claims abstract description 77
- 238000003723 Smelting Methods 0.000 title claims abstract description 57
- 239000010949 copper Substances 0.000 title claims abstract description 54
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 50
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 229910052803 cobalt Inorganic materials 0.000 title claims abstract description 49
- 239000010941 cobalt Substances 0.000 title claims abstract description 49
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 49
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000003756 stirring Methods 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000002386 leaching Methods 0.000 claims abstract description 21
- 239000007789 gas Substances 0.000 claims abstract description 19
- 239000002440 industrial waste Substances 0.000 claims abstract description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003546 flue gas Substances 0.000 claims abstract description 13
- 238000010521 absorption reaction Methods 0.000 claims abstract description 12
- 238000000227 grinding Methods 0.000 claims abstract description 11
- 238000010791 quenching Methods 0.000 claims abstract description 10
- 230000000171 quenching Effects 0.000 claims abstract description 10
- 239000002912 waste gas Substances 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 238000011084 recovery Methods 0.000 abstract description 19
- 229910052751 metal Inorganic materials 0.000 abstract description 10
- 239000002184 metal Substances 0.000 abstract description 9
- 150000002739 metals Chemical class 0.000 abstract description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000002253 acid Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 229910052681 coesite Inorganic materials 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000005712 crystallization Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 3
- 229910052904 quartz Inorganic materials 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- KTVIXTQDYHMGHF-UHFFFAOYSA-L Cobalt(II) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 150000004763 sulfides Chemical class 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- ARUVKPQLZAKDPS-UHFFFAOYSA-L Copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 229910003301 NiO Inorganic materials 0.000 description 1
- LGQLOGILCSXPEA-UHFFFAOYSA-L Nickel(II) sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 1
- MRIRHFHBPJKCFV-UHFFFAOYSA-N [Fe]=S.[Cu].[Co].[Ni] Chemical compound [Fe]=S.[Cu].[Co].[Ni] MRIRHFHBPJKCFV-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(II) oxide Inorganic materials [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910000366 copper(II) sulfate Inorganic materials 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052840 fayalite Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910052839 forsterite Inorganic materials 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052909 inorganic silicate Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N nickel(II) oxide Inorganic materials [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 1
- 229910052609 olivine Inorganic materials 0.000 description 1
- 239000010450 olivine Substances 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052611 pyroxene Inorganic materials 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- -1 sulfate ions Chemical class 0.000 description 1
- 210000001519 tissues Anatomy 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0065—Leaching or slurrying
- C22B15/0067—Leaching or slurrying with acids or salts thereof
- C22B15/0071—Leaching or slurrying with acids or salts thereof containing sulfur
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0407—Leaching processes
- C22B23/0415—Leaching processes with acids or salt solutions except ammonium salts solutions
- C22B23/043—Sulfurated acids or salts thereof
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a device for recovering nickel, copper and cobalt from nickel smelting water-quenched slag, which comprises a tank body (1), a transmission mechanism (2), a stirring paddle (3) and a lifting mechanism (4), wherein the stirring paddle (3) is arranged inside the tank body (1), and the transmission mechanism (2) is connected with the stirring paddle (3); one end of the tank body (1) is provided with an overflow port (5), and the other end is provided with a tailing discharge port (6); the lifting mechanism (4) is arranged at one end of the tank body (1); the tank body (1) is provided with a feed inlet (7), a plurality of flue gas inlet openings (8) and a waste gas absorption opening (9). The recovery method comprises the following steps: finely grinding nickel smelting water-quenched slag; adding the levigated water quenching slag and water into a tank body; introducing the smelting industrial waste gas containing sulfur dioxide into the tank body, and starting the stirring paddle to obtain a leaching product containing nickel, copper and cobalt and leached residues. The method can recover valuable metals in the water-quenched slag at lower cost.
Description
Technical Field
The invention belongs to the technical field of non-ferrous metal smelting, and particularly relates to a device and a method for recovering nickel, copper and cobalt from nickel smelting water-quenched slag.
Background
The water quenching slag is a process waste slag discharged in the nickel smelting process and is FeO & SiO2The granulated slag formed by water quenching of the solution as the main component is discharged 150 ten thousand tons of water quenched slag every year in a certain nickel smelting plant, the annual utilization is about 10 ten thousand tons, the rest is accumulated in an enterprise slag yard, the accumulated storage amount reaches about 3000 ten thousand tons, and the balance is aboutThe ecological environment and the living environment around the enterprise cause serious environmental impact.
The main mineral phases of the water-quenched slag include pyroxene (magnesium-containing), olivine and the like, and in addition, the water-quenched slag contains a large amount of glass phases, and three main structures exist: (1) iron forsterite (Fe, Mg) in columnar distribution2SiO4And fayalite FeSi4A crystalline phase; (2) irregular silicon oxide fill phases between crystalline phases; (3) copper nickel cobalt iron sulfide distributed between the two tissues in a scattered manner. The water quenching slag contains a large amount of iron elements and silicon dioxide, and a small amount of metal elements such as nickel, copper, cobalt, lead, zinc and the like mainly exist in the form of oxides and sulfides. The long-term storage of the water-quenched slag not only causes environmental pollution, but also is huge resource waste, and simultaneously shows that the nickel smelting waste slag has huge development and utilization values.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a device and a method for recovering nickel, copper and cobalt from nickel smelting water-quenched slag, which can fully utilize waste nickel smelting water-quenched slag resources and recover valuable metals in the water-quenched slag at lower cost.
The invention adopts the following technical scheme:
the device for recovering nickel, copper and cobalt from nickel smelting water-quenched slag is characterized by comprising a tank body (1), a transmission mechanism (2), a stirring paddle (3) and a lifting mechanism (4), wherein the stirring paddle (3) is arranged inside the tank body (1), and the transmission mechanism (2) is connected with the stirring paddle (3); an overflow port (5) is processed at one end of the tank body (1), and a tailing discharge port (6) is processed at the other end of the tank body (1); the lifting mechanism (4) is arranged at one end of the tank body (1) which is provided with the overflow port (5); the tank body (1) is provided with a feed inlet (7), a plurality of flue gas inlet openings (8) and a waste gas absorption opening (9).
The device for recovering nickel, copper and cobalt from nickel smelting water-quenched slag is characterized in that the tank body (1) is obliquely arranged, and one end of the tank body (1) provided with the tailing discharge port (6) is higher than one end of the tank body (1) provided with the overflow port (5). The included angle between the bottom surface of the tank body (1) and the horizontal plane is 14-18 degrees.
The device for recovering nickel, copper and cobalt from nickel smelting water-quenched slag is characterized in that the stirring paddle (3) is a spiral stirring paddle; the lifting mechanism (4) is a spiral lifting mechanism; an exhaust gas absorption cover is arranged above the exhaust gas absorption opening (9).
The recovery method based on the device for recovering nickel, copper and cobalt from nickel smelting water-quenched slag is characterized by comprising the following steps of:
step (I): finely grinding the nickel smelting water-quenched slag to obtain finely ground water-quenched slag;
step (II): adding the levigated water quenching slag and water into a tank body; the mass ratio of the water-quenched slag after grinding to water is 1: (4-6);
step (three): introducing smelting industrial waste gas containing sulfur dioxide into the tank body through a plurality of flue gas inlets, and starting a stirring paddle to obtain a leaching product containing nickel, copper and cobalt and leached residues; leaching products containing nickel, copper and cobalt overflow through the overflow port, and residues after leaching are discharged through a tailing discharge port; the mass ratio of the flow of the smelting industrial waste gas containing sulfur dioxide to the water quenching slag is (2-3): 1, the concentration of sulfur dioxide in the smelting industrial waste gas containing sulfur dioxide is 8-10%, and the temperature of the smelting industrial waste gas containing sulfur dioxide is 120-220 ℃.
The recovery method of the device for recovering nickel, copper and cobalt from nickel smelting water-quenched slag is characterized in that the content of the water-quenched slag with the granularity of less than 3mm after being ground in the step (I) is more than or equal to 80 percent.
The recovery method of the device for recovering nickel, copper and cobalt from nickel smelting water-quenched slag is characterized in that the rotating speed of the stirring paddle in the step (III) is 3r/min-10 r/min.
The invention has the beneficial technical effects that: by adopting the device and the method, on the basis of fully utilizing the industrial flue gas, the sulfur dioxide-containing industrial flue gas is utilized for quick leaching without adding new acid liquid, the nickel, copper and cobalt elements in the nickel smelting water-quenched slag are efficiently and comprehensively recovered, and the aim of comprehensively utilizing industrial solid waste resources is fulfilled.
Drawings
FIG. 1 is a schematic view of the structure of the apparatus of the present invention.
Detailed Description
Referring to fig. 1, the device for recovering nickel, copper and cobalt from nickel smelting water-quenched slag comprises a tank body 1, a transmission mechanism 2, a stirring paddle 3 and a lifting mechanism 4, wherein the stirring paddle 3 is arranged inside the tank body 1, the stirring paddle 3 is a spiral stirring paddle, the diameter of the stirring paddle 3 is 1000mm-2400mm, and the length of the stirring paddle 3 is 8000mm-14000 mm; the transmission mechanism 2 is connected with the stirring paddle 3; an overflow port 5 is processed at one end of the tank body 1, and a tailing discharge port 6 is processed at the other end of the tank body 1; the tank body 1 is obliquely arranged, and one end of the tank body 1, which is provided with a tailing discharge opening 6, is higher than one end of the tank body 1, which is provided with an overflow opening 5. The lifting mechanism 4 is arranged at one end of the tank body 1 where the overflow port 5 is processed, and the lifting mechanism 4 is a spiral lifting mechanism. The tank body 1 is provided with a feed inlet 7, a plurality of flue gas inlet openings 8 and a waste gas absorption opening 9, and a waste gas absorption cover is arranged above the waste gas absorption opening 9.
The working principle of the device is as follows: uniformly feeding the levigated water quenching slag into a tank body through a feeder, adding water into the tank body, introducing industrial high-temperature waste flue gas containing sulfur dioxide from a flue gas inlet, and carrying out acid leaching reaction under the action of spiral stirring, wherein the leaching solution is a product, and the leaching slag is a tailing. The flue gas inlet ports are distributed along the two sides of the tank body in a staggered mode, the distance between the flue gas inlet ports and the tank bottom is 100mm, the number of the inlet points is 5-6, the distance between the inlet points is 1000mm, the inlet amount is increased along with the depth of ore pulp, and the inlet amount is controlled by a valve. The inlet nozzle extends into the middle of the rotating blade, and the extending length of the inlet nozzle is 200 mm. The production capacity of the device is 4.0-7.0t/h, the specification and the model of the device can be increased according to the increase of unit production capacity, the groove body of the device needs anticorrosion treatment, and the stirring paddle and the blades need anticorrosion wear-resistant materials.
The recovery method of the device for recovering nickel, copper and cobalt from the nickel smelting water-quenched slag comprises the following steps:
step (I): finely grinding the nickel smelting water-quenched slag to obtain finely ground water-quenched slag; the nickel smelting water-quenched slag comprises the following components in percentage by mass: 1.5 to 14 percent of MgO, 0.8 to 5.0 percent of CaO, 0.15 to 0.5 percent of Ni, 0.2 to 0.3 percent of Cu, 0.06 to 0.3 percent of Co0.06 to 0.3 percent of Fe 30 to 45 percent of S, 0.5 to 1.2 percent of S and the balance of SiO2And compounds corresponding to the above metals. The nickel smelting water-quenched slag mainly comprises iron element and silicon dioxide, wherein the mass percentage of the iron element can reach 30-45%, and SiO2The mass percentage of the components can reach 30-42 percent. The content of the ground water-quenched slag with the granularity less than 3mm is more than or equal to 80 percent.
Step (II): uniformly feeding the levigated water-quenched slag into the tank body 1 through a feeder, and adding water into the tank body 1, wherein the mass ratio of the levigated water-quenched slag to the water is 1: (4-6).
Step (three): introducing the sulfur dioxide-containing high-temperature smelting industrial waste gas into the tank body 1 through a plurality of flue gas addition ports 8, wherein the mass ratio of the introduction flow of the sulfur dioxide-containing high-temperature smelting industrial waste gas to the water quenching slag is (2-3): 1, the concentration of sulfur dioxide in the smelting industrial waste gas containing sulfur dioxide is 8-10%, the temperature of the smelting industrial waste gas containing sulfur dioxide is 120-220 ℃, and the temperature of the solution is ensured to be 40-90 ℃; starting the stirring paddle 3, wherein the rotating speed of the stirring paddle 3 is 3r/min-10r/min, and under the stirring of the stirring paddle, nickel, copper and cobalt in the water-quenched slag enter a solution in the form of sulfate ions to obtain a leaching product containing nickel, copper and cobalt and leached residues; the leached product containing nickel, copper and cobalt overflows through an overflow port 5, after the leached product is evaporated and crystallized, the leached product contains 4.0 to 8.0 percent of nickel, 2.0 to 5.0 percent of copper and 1.0 to 3.0 percent of cobalt, and is sent to a smelting system (a fire method or a wet method) to be treated and recycled with valuable metals of nickel, copper and cobalt; the leached residue is conveyed to a tailing discharge port 6 by a screw to be discharged, and is leached tailings. And the waste gas at the overflow part of the liquid level of the leaching tank is pumped out through a waste gas absorption port and enters an industrial tail gas absorption system for treatment.
The principle of the recovery method of the invention: grinding the water quenched slag evenly and feeding the water quenched slag into a device, adding water to form ore pulp, introducing high-temperature industrial waste gas containing sulfur dioxide into the ore pulp, wherein SO in the waste gas2Reacting with water and oxygen in the ore pulp to produce sulfuric acid, reacting sulfide or oxide containing nickel, copper and cobalt in the water-quenched slag with the sulfuric acid, and recovering the nickel, copper and cobalt in the form of sulfate entering the solution.
The main chemical reaction equation is:
2H2O+2SO2+O2→2H2SO4
2Ni3S2+2H2SO4+9O2→6NiSO4+2H2O
2Cu2S+2H2SO4+5O2→4CuSO4+2H2O
CoS+H2SO4+O2→CoSO4+H2O
NiO+H2SO4→NiSO4+H2O
CuO+H2SO4→CuSO4+H2O
CoO+H2SO4→CoSO4+H2O
example 1
Finely grinding the nickel smelting water-quenched slag, wherein the content of the finely ground water-quenched slag with the granularity of less than 3mm is 82 percent; the nickel smelting water-quenched slag comprises the following components in percentage by mass: 0.16% of Ni, 0.22% of Cu and 0.086% of Co.
Uniformly feeding the ground water-quenched slag into the tank body through a feeder, wherein the feeding amount is 4.0t/h, and adding water into the tank body to control the liquid-solid ratio to be 4: 1.
To the groove body at a distance of 9.6m3Introducing 8-10% sulfur dioxide smelting industrial waste gas at a flow rate of/h, and carrying out acid leaching reaction to obtain a leaching product containing nickel, copper and cobalt and leached residues; after evaporation and crystallization of the leached product, 4.16% of nickel, 4.14% of copper and 1.21% of cobalt are contained, the recovery rate of nickel is 37.2%, the recovery rate of copper is 26.7% and the recovery rate of cobalt is 19.3%. The product is sent to a pyrometallurgical system for further recovering valuable metals of nickel, copper and cobalt.
Example 2
Finely grinding the nickel smelting water-quenched slag, wherein the content of the finely ground water-quenched slag with the granularity less than 3mm is 83%; the nickel smelting water-quenched slag comprises the following components in percentage by mass: 0.31% of Ni, 0.24% of Cu and 0.20% of Co.
Uniformly feeding the ground water-quenched slag into the tank body through a feeder, wherein the feeding amount is 6.0t/h, and adding water into the tank body to control the liquid-solid ratio to be 4: 1.
To the groove body at a distance of 14.22m3Introducing 8-10% sulfur dioxide smelting industrial waste gas at a flow rate of/h, and carrying out acid leaching reaction to obtain a leaching product containing nickel, copper and cobalt and leached residues; after evaporation and crystallization of the leached product, 5.13% of nickel, 3.34% of copper and 1.94% of cobalt are contained, the recovery rate of nickel is 41.4%, the recovery rate of copper is 34.6% and the recovery rate of cobalt is 24.2%. The product is sent to a pyrometallurgical system for further recovering valuable metals of nickel, copper and cobalt.
Example 3
Finely grinding the nickel smelting water-quenched slag, wherein the content of the grinded water-quenched slag with the granularity less than 3mm is 84%; the nickel smelting water-quenched slag comprises the following components in percentage by mass: 0.43% of Ni, 0.25% of Cu and 0.22% of Co.
Uniformly feeding the ground water-quenched slag into the tank body through a feeder, wherein the feeding amount is 6.5t/h, and adding water into the tank body to control the liquid-solid ratio to be 4: 1.
To the groove body at a distance of 14.4m3Introducing 8-10% sulfur dioxide smelting industrial waste gas at a flow rate of/h, and carrying out acid leaching reaction to obtain a leaching product containing nickel, copper and cobalt and leached residues; after the leached product is evaporated and crystallized, 6.48 percent of nickel, 3.17 percent of copper and 2.30 percent of cobalt are contained, the recovery rate of nickel is 43.3 percent, the recovery rate of copper is 35.4 percent and the recovery rate of cobalt is 28.8 percent. The product is sent to a pyrometallurgical system for further recovering valuable metals of nickel, copper and cobalt.
Example 4
Finely grinding the nickel smelting water-quenched slag, wherein the content of the finely ground water-quenched slag with the granularity less than 3mm is 87%; the nickel smelting water-quenched slag comprises the following components in percentage by mass: 0.60% of Ni, 0.30% of Cu and 0.28% of Co.
Uniformly feeding the ground water-quenched slag into the tank body through a feeder, wherein the feeding amount is 7.0t/h, and adding water into the tank body to control the liquid-solid ratio to be 4: 1.
To the groove body at 16.59m3Flow introduction in/hCarrying out acid leaching reaction on smelting industrial waste gas with 8-10% of sulfur dioxide concentration to obtain a leaching product containing nickel, copper and cobalt and leached residues; after evaporation and crystallization of the leached product, the recovery rate of nickel is 7.68 percent, copper is 2.90 percent, cobalt is 2.16 percent, the recovery rate of nickel is 51.3 percent, the recovery rate of copper is 41.4 percent, and the recovery rate of cobalt is 30.8 percent. The product is sent to a pyrometallurgical system for further recovering valuable metals of nickel, copper and cobalt.
Claims (6)
1. The device for recovering nickel, copper and cobalt from nickel smelting water-quenched slag is characterized by comprising a tank body (1), a transmission mechanism (2), a stirring paddle (3) and a lifting mechanism (4), wherein the stirring paddle (3) is arranged inside the tank body (1), and the transmission mechanism (2) is connected with the stirring paddle (3); an overflow port (5) is processed at one end of the tank body (1), and a tailing discharge port (6) is processed at the other end of the tank body (1); the lifting mechanism (4) is arranged at one end of the tank body (1) which is provided with the overflow port (5); the tank body (1) is provided with a feed inlet (7), a plurality of flue gas inlet openings (8) and a waste gas absorption opening (9).
2. The device for recovering nickel, copper and cobalt from nickel smelting water-quenched slag according to claim 1, wherein the trough body (1) is obliquely arranged, and one end of the trough body (1) provided with a tailing discharge opening (6) is higher than one end of the trough body (1) provided with an overflow opening (5); the included angle between the bottom surface of the tank body (1) and the horizontal plane is 14-18 degrees.
3. The device for recovering nickel, copper and cobalt from nickel smelting water-quenched slag according to claim 1, wherein the stirring paddle (3) is a spiral stirring paddle; the lifting mechanism (4) is a spiral lifting mechanism; an exhaust gas absorption cover is arranged above the exhaust gas absorption opening (9).
4. A method for recovering nickel, copper and cobalt from nickel smelting water-quenched slag based on any one of claims 1 to 3, which comprises the following steps:
step (I): finely grinding the nickel smelting water-quenched slag to obtain finely ground water-quenched slag;
step (II): adding the levigated water quenching slag and water into a tank body; the mass ratio of the water-quenched slag after grinding to water is 1: (4-6);
step (three): introducing smelting industrial waste gas containing sulfur dioxide into the tank body through a plurality of flue gas inlets, and starting a stirring paddle to obtain a leaching product containing nickel, copper and cobalt and leached residues; leaching products containing nickel, copper and cobalt overflow through the overflow port, and residues after leaching are discharged through a tailing discharge port; the mass ratio of the flow of the smelting industrial waste gas containing sulfur dioxide to the water quenching slag is (2-3): 1, the concentration of sulfur dioxide in the smelting industrial waste gas containing sulfur dioxide is 8-10%, and the temperature of the smelting industrial waste gas containing sulfur dioxide is 120-220 ℃.
5. The method for recovering nickel, copper and cobalt from nickel smelting water-quenched slag according to claim 4, wherein the content of the water-quenched slag with the granularity of less than 3mm after being ground in the step (one) is more than or equal to 80%.
6. The method for recovering nickel, copper and cobalt from nickel smelting water-quenched slag according to claim 4, wherein the rotation speed of the stirring paddle in the step (III) is 3r/min to 10 r/min.
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