CN102358919A - Method for extracting valuable metal from submarine metallic ore - Google Patents
Method for extracting valuable metal from submarine metallic ore Download PDFInfo
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- CN102358919A CN102358919A CN2011103414490A CN201110341449A CN102358919A CN 102358919 A CN102358919 A CN 102358919A CN 2011103414490 A CN2011103414490 A CN 2011103414490A CN 201110341449 A CN201110341449 A CN 201110341449A CN 102358919 A CN102358919 A CN 102358919A
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Abstract
The invention discloses a method for extracting valuable metal from submarine metallic ore, which comprises the following steps: coarsely crushing submarine metallic ore, drying the coarsely crushed ore materials; levigating the dried ore materials to obtain ore powder; placing the ore powder in a reaction bed, injecting hydrogen under a heating condition to perform a reduction reaction; adding the reduced discharged material into an acid solution for acid leaching; concentrating the leached ore pulp after acid leaching, collecting the supernatant, performing pressure filtration of the concentrated underflow, combining the filtrate and the supernatant, removing impurities, extracting, and recovering valuable metal by an electrodeposition method. The method of the invention has the advantages of resource saving, low energy consumption, low pollution, zero carbon discharge capacity, high reduction and leaching rates, and the like.
Description
Technical field
The invention belongs to metallurgical metal field, relate in particular to a kind of method that from metallic ore, adopts pyrogenic process-wet method combined metallurgy.
Background technology
Oceanic multi-metal nodule and cobalt-bearing crust are human total huge seabed mineral metal products resources.(about 2,517 hundred million km of the total area in the international sea-bed area
2Take up an area of the ball total area 49%) the marine bottom sediment top layer of 4km～6km; Containing has abundant polymetallic nodule ore deposit, and total resources reaches 3,000,000,000,000 tons, has the stock number of commercial extraction value to reach 75,000,000,000 tons; Wherein the average content of nickel, cobalt, copper, manganese is respectively 1.3%, 0.22%, 2% and 25%, and its stock number is respectively the several times of land respective resources amount to thousands of times.Cobalt-bearing crust is composed and is stored in the seamount of seabed 800m～4000m, the basement rock top layer of Hai Po, and the average content of cobalt is 0.8%～2.0%, exceeds tens of times than land resources, and its stock number also is tens of times of land.Along with the aggravation of global economy active, the spending rate of resource is accelerated, and the metals resources that land can supply exploit is day by day exhausted, and seabed mineral metal products resource will become the important source that the mankind obtain various metals resources, and 21 century will become human ocean century.
The essential mineral composition of oceanic multi-metal nodule and cobalt-bearing crust is a vernadite, secondly is the hydrous oxide of iron, and aluminosilicate mineral such as zeolite, quartz, clay.Nickel, cobalt, copper etc. are composed with the isomorph form and are stored in the lattice of iron and manganese oxides; Part is adsorbed on iron and manganese oxides and shows that be the crystallite attitude, mineral grain is very tiny; Adopt the physical concentration method to be difficult to its separation, enrichment; The direct smelting mode of general employing is processed, and main smelting process has technologies such as smelting-rust corrosion-extraction process, reduction roasting-ammonia leaching method, sulphur dioxide reduction-pickling process, carbon monoxide reduction-ammonia leaching process, but these technologies all come with some shortcomings.For example smelting-rust corrosion-extraction process, reduction roasting-ammonia leaching method flow process are long, energy consumption is higher, the carbon emission amount high, and there are the problem that reductive agent recycle difficulty is big, pollution is big, the carbon emission amount is big in sulphur dioxide reduction-pickling process and carbon monoxide reduction-pickling process.
Summary of the invention
The technical problem that the present invention will solve be high to the energy consumption that exists in the prior art, pollute big, defectives such as the carbon emission amount is big, raw material transportation cost height, proposed a kind ofly to save resource, the method for energy consumption is low, pollutions is low, the carbon emission amount is zero, reduction and leaching yield are high from the metallic ore of seabed extraction valuable metal.
For solving the problems of the technologies described above, the technical scheme that the present invention proposes is a kind of method of from the metallic ore of seabed, extracting valuable metal, may further comprise the steps:
(1) coarse crushing is dry: said seabed metallic ore is carried out coarse crushing earlier, then the mineral aggregate after the coarse crushing is carried out drying;
(2) levigate: the mineral aggregate that obtains after the above-mentioned steps (1) is levigate, obtain the breeze material;
(3) hydrogen reduction: the breeze material that obtains after the above-mentioned steps (2) is placed reaction bed, under heating condition, feed hydrogen and carry out reduction reaction;
(4) acidleach: will add to through the discharging after above-mentioned steps (3) reduction and carry out acidleach in the acid solution;
(5) thickening filtration: will concentrate through the leaching ore pulp after above-mentioned steps (4) acidleach, collect supernatant, the underflow after concentrating will be filtrated and said supernatant merging after press filtration, after removal of impurities, extraction, reclaim valuable metal wherein through the electrodeposition method again.
Above-mentioned extracts in the method for valuable metal from the metallic ore of seabed, and said seabed metallic ore is preferably oceanic multi-metal nodule and/or cobalt-bearing crust.Said valuable metal is preferably one or more in manganese metal, copper, cobalt, the nickel.
The above-mentioned method of from the metallic ore of seabed, extracting valuable metal, in the said coarse crushing drying step, said coarse crushing preferably is meant the metallic ore coarse crushing of said seabed to 30mm.
The above-mentioned method of from the metallic ore of seabed, extracting valuable metal, in the said coarse crushing drying step, said drying preferably is meant the mineral aggregate after the coarse crushing is dried to moisture content below 18%.
The above-mentioned method of from the metallic ore of seabed, extracting valuable metal; When said seabed metallic ore is oceanic multi-metal nodule; Saidly levigately preferably be meant this oceanic multi-metal nodule levigately to 0.5mm, wherein the particle below the 0.1mm accounts for more than 60% of said breeze material quality;
When said seabed metallic ore is oceanic multi-metal nodule and cobalt-bearing crust; The mass ratio of said oceanic multi-metal nodule and cobalt-bearing crust is preferably (1～4): 1; Saidly levigately preferably be meant the compound of this oceanic multi-metal nodule and cobalt-bearing crust levigately to 0.5mm, wherein the particle below the 0.075mm accounts for more than 60% of said breeze material quality (mixing again after also can be to oceanic multi-metal nodule and cobalt-bearing crust levigate respectively).
The above-mentioned method of from the metallic ore of seabed, extracting valuable metal; In the said hydrogen reduction step; Said heating condition is meant that preferably the temperature of reaction of said reduction reaction preferably is controlled at 380 ℃～580 ℃ more than the heat temperature raising to 380 ℃, and the time of reduction reaction is preferably 15min～90min.Said reaction bed is preferably horizontal type fixed bed or gas-solid formula fluidized-bed.
The above-mentioned method of from the metallic ore of seabed, extracting valuable metal, said hydrogen reduction step preferably (is preferably nitrogen atmosphere) under protection of inert gas atmosphere carries out, and the rare gas element of feeding and the volume ratio of said hydrogen are preferably 1: (0.5～4).Preferred, in the said hydrogen reduction step, the ventilation flow rate scope of said rare gas element and said hydrogen all preferably feeds 3m by breeze material PM per ton
3～50m
3Calculate.
The above-mentioned method of from the metallic ore of seabed, extracting valuable metal; In the said step of acid dipping; The acid solution of selecting for use is preferably sulphuric acid soln or is sulfuric acid-nitric acid mixing solutions; Said vitriolic concentration preferably is controlled at 150g/l～300g/l, and the concentration of said nitric acid preferably is controlled at 50g/l～150g/l.Preferred; In the said step of acid dipping, the temperature during said acidleach is 80 ℃～110 ℃, and the liquid-solid ratio during said acidleach is (5～10): 1; Said leaching time is that 0.5h～3h (most preferably is 1h～2h), the stirring intensity 250r/min～600r/min during acidleach.But aerating oxygen is to improve leaching effect in the said acidleach process.
The above-mentioned method of from the metallic ore of seabed, extracting valuable metal, in the said thickening filtration step, said concentrating is meant that preferably the employing thickener concentrates, the solid content that concentrates the said underflow in back is controlled at more than 35%.Before the leaching ore pulp is filtered, through adopting thickener to concentrate, can alleviate the load of follow-up filtration step, the washing lotion after the filtration is returned leaching, helps improving the recovery of metal.
Compared with prior art; The invention has the advantages that: the present invention through efficient reduction and acid leaching process can effectively extract valuable metal manganese in oceanic multi-metal nodule and the cobalt-bearing crust, copper, cobalt, nickel etc., the particularly leaching yield of cobalt more in the past technology be significantly increased.Hydrogen reduction-pickling process of the present invention is through adopting hydrogen as reductive agent; The mixture of reduction oceanic multi-metal nodule ore deposit or polymetallic nodule ore deposit and cobalt-bearing crust under static state or fluidized state; Material after the reduction adopts the mixture of sulfuric acid or sulfuric acid and nitric acid to leach metals such as manganese, copper, cobalt, nickel, and the electric energy water of decomposition that hydrogen can pass through sun power, nuclear energy generation produces, or from sea-bottom natural gas, combustible ice, extracts; Generate free of contamination water behind the hydrogen reducing; Water generates hydrogen and oxygen through electrolysis again, and hydrogen is used for circulation, and oxygen can be used for the acidleach process to improve metal acidleach effect; A large amount of basement rock tailings that processing produces can be poured the deep-sea into, avoid the secondary pollution to land.It is thus clear that; Hydrogen reduction-acid leaching process of the present invention have energy consumption low, pollute characteristics such as little, carbon emission amount is zero, reductive agent is renewable; Can realize cleaner production; The in-situ processing and the large-scale industrialization that help the seabed metalliferous mineral are used, and can save a large amount of raw material transport charges, realize the economy of seabed mineral metal products resource, comprehensive utilization.
Description of drawings
Fig. 1 is the process flow sheet that extracts the valuable metal method in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is further described.
Embodiment 1:
A kind of method of from the metallic ore of seabed, extracting valuable metal of the present invention as shown in Figure 1 may further comprise the steps:
(1) coarse crushing is dry: oceanic multi-metal nodule (manganese nodule) coarse crushing to 30mm, is dried to moisture＜18%;
(2) levigate: it is levigate to 0.5mm to get the dried polymetallic nodule of 45g, and wherein the particle below the 0.1mm accounts for 60%;
(3) hydrogen reduction: with the polymetallic nodule powder add tube type resistance furnace (horizontal type fixed bed or gas-solid formula fluidized-bed all can, down with) in, feed N when being heated to 300 ℃
2, feed H in the time of 390 ℃
2And reduction 60min under keeping 390 ℃.N
2And H
2Ratio 1: 1 (volume ratio), N
2And H
2Flow is controlled at 15m respectively
3/ t material min; The reduction back is at N
2Be cooled to come out of the stove below 150 ℃ under the protection, get the 33g discharging;
(4) acidleach: the discharging of getting after the 25g reduction joins agitation leach in sulfuric acid-nitric acid mixing solutions, vitriolic concentration 230g/l wherein, and concentration of nitric acid 100g/l, liquid-solid ratio is 7: 1,90 ℃ of extraction temperatures, extraction time 2h, stirring intensity 250r/min;
(5) thickening filtration: will in thickener, concentrate through the leaching ore pulp after above-mentioned steps (4) acidleach, collect supernatant, the underflow after concentrating (solid content control 35%) after press filtration, will be filtrated and supernatant merges, and washing lotion is returned leaching; After removal of impurities, extraction, reclaim wherein valuable metal manganese, copper, cobalt and nickel again through the electrodeposition method.The slip filtered while hot be will leach, filter cake and filtrating obtained.Weigh sample examination behind the filtration cakes torrefaction.The leaching yield 95.89% of cobalt.
Embodiment 2:
A kind of method of from the metallic ore of seabed, extracting valuable metal of the present invention may further comprise the steps:
(1) coarse crushing is dry: oceanic multi-metal nodule (manganese nodule) coarse crushing to 30mm, is dried to moisture＜18%;
(2) levigate: it is levigate to 0.5mm to get the dried polymetallic nodule of 45g, and wherein the particle below the 0.1mm accounts for 60%;
(3) hydrogen reduction: the polymetallic nodule powder is added in the tube type resistance furnace, feed N when being heated to 300 ℃
2, feed H in the time of 450 ℃
2And reduction 30min under keeping 450 ℃, N
2And H
2Ratio 1: 4 (volume ratio), N
2And H
2Flow is controlled at 10m respectively
3/ t material min and 45m
3/ t material min, the reduction back is at N
2Be cooled to come out of the stove below 150 ℃ under the protection, get the 32.7g discharging;
(4) acidleach: the discharging of getting after the 25g reduction joins agitation leach in sulfuric acid-nitric acid mixing solutions, vitriolic concentration 230g/l wherein, and concentration of nitric acid 100g/l, liquid-solid ratio is 8: 1,90 ℃ of extraction temperatures, extraction time 2h, stirring intensity 300r/min;
(5) thickening filtration: will in thickener, concentrate through the leaching ore pulp after above-mentioned steps (4) acidleach, collect supernatant, the underflow after concentrating (solid content control＞45%) after press filtration, will be filtrated and supernatant merges, and washing lotion is returned leaching; After removal of impurities, extraction, reclaim wherein valuable metal manganese, copper, cobalt and nickel again through the electrodeposition method.
The slip filtered while hot be will leach, filter cake and filtrating obtained.Weigh sample examination behind the filtration cakes torrefaction.Through detecting, the leaching yield of various extraction metallic elements is as shown in table 1 below.
The leaching result of various metallic elements among table 1: the embodiment 2
| Element | Mn | Cu | Co | Ni |
| Leaching yield (%) | 99.53 | 99.64 | 96.74 | 99.41 |
Embodiment 3:
A kind of method of from the metallic ore of seabed, extracting valuable metal of the present invention may further comprise the steps:
(1) coarse crushing is dry: oceanic multi-metal nodule (manganese nodule) coarse crushing to 30mm, is dried to moisture＜15%;
(2) levigate: it is levigate to 0.5mm to get the dried polymetallic nodule of 45g, and wherein the particle below the 0.1mm accounts for 60%;
(3) hydrogen reduction: the polymetallic nodule powder is added in the tube type resistance furnace, feed N when being heated to 300 ℃
2, feed H in the time of 420 ℃
2And reduction 30min under keeping 420 ℃, N
2And H
2Ratio 2: 1 (volume ratio), N
2And H
2Flow is controlled at 10m respectively
3/ t material min and 5m
3/ t material min; The reduction back is at N
2Be cooled to come out of the stove below 150 ℃ under the protection, get the 32.8g discharging;
(4) acidleach: the discharging of getting after 25g reduces joins agitation leach in the sulphuric acid soln, and wherein vitriolic concentration is controlled at 250g/l, and liquid-solid ratio is 6.5: 1,90 ℃ of extraction temperatures, extraction time 2h, stirring intensity 300r/min;
(5) thickening filtration: will in thickener, concentrate through the leaching ore pulp after above-mentioned steps (4) acidleach, collect supernatant, the underflow after concentrating (solid content control＞40%) after press filtration, will be filtrated and supernatant merges, and washing lotion is returned leaching; After removal of impurities, extraction, reclaim wherein valuable metal manganese, copper, cobalt and nickel again through the electrodeposition method.Through detecting, will leach the slip filtered while hot, obtain filter cake and filtrating.Weigh behind the filtration cakes torrefaction, sample examination, the cobalt leaching yield reaches 90.63%.
Embodiment 4:
A kind of method of from the metallic ore of seabed, extracting valuable metal of the present invention may further comprise the steps:
(1) coarse crushing is dry: oceanic multi-metal nodule (manganese nodule) coarse crushing to 30mm, is dried to moisture＜18%;
(2) levigate: it is levigate to 0.5mm to get the dried polymetallic nodule of 45g, and wherein the particle below the 0.1mm accounts for 60%;
(3) hydrogen reduction: the polymetallic nodule powder is added in the tube type resistance furnace, feed N when being heated to 300 ℃
2, feed H in the time of 420 ℃
2And reduction 90min under keeping 420 ℃, N
2And H
2Ratio 1: 1 (volume ratio), N
2And H
2Flow is controlled at 10m respectively
3/ t material min, the reduction back is at N
2Be cooled to come out of the stove below 150 ℃ under the protection, get the 32.8g discharging;
(4) acidleach: the discharging of getting after 25g reduces joins agitation leach in sulfuric acid-nitric acid mixing solutions, and wherein vitriolic concentration is controlled at 120g/l, and the concentration of nitric acid is controlled at 60g/l; Liquid-solid ratio is 8: 1; 90 ℃ of extraction temperatures, extraction time 2h, stirring intensity 400r/min;
(5) thickening filtration: will in thickener, concentrate through the leaching ore pulp after above-mentioned steps (4) acidleach, collect supernatant, the underflow after concentrating (solid content control＞45%) after press filtration, will be filtrated and supernatant merges, and washing lotion is returned leaching; After removal of impurities, extraction, reclaim wherein valuable metal manganese, copper, cobalt and nickel again through the electrodeposition method.Through detecting, will leach the slip filtered while hot, obtain filter cake and filtrating.Weigh behind the filtration cakes torrefaction, sample examination, the cobalt leaching yield reaches 91.72%.
Embodiment 5:
A kind of method of from the metallic ore of seabed, extracting valuable metal of the present invention may further comprise the steps:
(1) coarse crushing is dry: the oceanic multi-metal nodule coarse crushing to 30mm, is dried to moisture＜15%;
(2) levigate: it is levigate to 0.5mm to get the dried polymetallic nodule of 45g, and wherein the particle below the 0.1mm accounts for 60%;
(3) hydrogen reduction: the polymetallic nodule powder is added in the tube type resistance furnace, feed N when being heated to 300 ℃
2, feed H in the time of 420 ℃
2And reduction 15min under keeping 420 ℃, N
2And H
2Ratio 1: 2 (volume ratio), N
2And H
2Flow is controlled at 15m respectively
3/ t material min and 30m
3/ t material min; The reduction back is at N
2Be cooled to come out of the stove below 150 ℃ under the protection, get the 32.8g discharging;
(4) acidleach: the discharging of getting after 25g reduces joins agitation leach in sulfuric acid-nitric acid mixing solutions, and wherein vitriolic concentration is controlled at 230g/l, and the concentration of nitric acid is controlled at 100g/l; Liquid-solid ratio is 8: 1; 90 ℃ of extraction temperatures, extraction time 2h, stirring intensity 250r/min;
(5) thickening filtration: will in thickener, concentrate through the leaching ore pulp after above-mentioned steps (4) acidleach, collect supernatant, the underflow after concentrating (solid content control＞45%) after press filtration, will be filtrated and supernatant merges, and washing lotion is returned leaching; After removal of impurities, extraction, reclaim wherein valuable metal manganese, copper, cobalt and nickel again through the electrodeposition method.The slip filtered while hot be will leach, filter cake and filtrating obtained.Weigh sample examination behind the filtration cakes torrefaction.Through detecting, the cobalt leaching yield reaches 95.3%.
Embodiment 6:
A kind of method of from the metallic ore of seabed, extracting valuable metal of the present invention may further comprise the steps:
(1) coarse crushing is dry: oceanic multi-metal nodule (manganese nodule) and cobalt-bearing crust coarse crushing to 30mm, are dried to moisture＜15%;
(2) levigate: polymetallic nodule and the cobalt-bearing crust mixing of getting the dried mass ratio of 45g and be 3: 1 are levigate to 0.5mm, and wherein the particle below the 0.074mm accounts for 60%;
(3) hydrogen reduction: the polymetallic nodule powder is added in the tube type resistance furnace, feed N when being heated to 300 ℃
2, feed H in the time of 550 ℃
2And reduction 60min under keeping 550 ℃; N
2And H
2Ratio 1: 1 (volume ratio), N
2And H
2Flow is controlled at 7.5m respectively
3/ t material min and 7.5m
3/ t material min; The reduction back is at N
2Be cooled to come out of the stove below 150 ℃ under the protection, get the 32.7g discharging;
(4) acidleach: the discharging of getting after 25g reduces joins agitation leach in sulfuric acid-nitric acid mixing solutions, and wherein vitriolic concentration is controlled at 230g/l, and the concentration of nitric acid is controlled at 100g/l; Liquid-solid ratio is 8: 1; 90 ℃ of extraction temperatures, extraction time 2h, stirring intensity 550r/min;
(5) thickening filtration: will in thickener, concentrate through the leaching ore pulp after above-mentioned steps (4) acidleach, collect supernatant, the underflow after concentrating (solid content control＞45%) after press filtration, will be filtrated and supernatant merges, and washing lotion is returned leaching; After removal of impurities, extraction, reclaim wherein valuable metal manganese, copper, cobalt and nickel again through the electrodeposition method.The slip filtered while hot be will leach, filter cake and filtrating obtained.Weigh sample examination behind the filtration cakes torrefaction.Through detecting, the leaching yield of each metallic element is as shown in table 2 below.
The leaching result of various metallic elements among table 2: the embodiment 6
| Element | Mn | Cu | Co | Ni |
| Leaching yield (%) | 94.33 | 94.28 | 88.14 | 94.21 |
Embodiment 7:
A kind of method of from the metallic ore of seabed, extracting valuable metal of the present invention may further comprise the steps:
(1) coarse crushing is dry: oceanic multi-metal nodule (manganese nodule) and cobalt-bearing crust coarse crushing to 30mm, are dried to moisture＜15%;
(2) levigate: polymetallic nodule and the cobalt-bearing crust mixing of getting the dried mass ratio of 45g and be 4: 1 are levigate to 0.5mm, and wherein the particle below the 0.074mm accounts for 60%;
(3) hydrogen reduction: the polymetallic nodule powder is added in the tube type resistance furnace, feed N when being heated to 300 ℃
2, feed H in the time of 420 ℃
2And reduction 30min under keeping 420 ℃; N
2And H
2Ratio 2: 1 (volume ratio), N
2And H
2Flow is controlled at 15m respectively
3/ t material min and 7.5m
3/ t material min; The reduction back is at N
2Be cooled to come out of the stove below 150 ℃ under the protection, get the 32.8g discharging;
(4) acidleach: the discharging of getting after 25g reduces joins agitation leach in sulfuric acid-nitric acid mixing solutions, and wherein vitriolic concentration is controlled at 230g/l, and the concentration of nitric acid is controlled at 60g/l; Liquid-solid ratio is 10: 1; 90 ℃ of extraction temperatures, extraction time 2h, stirring intensity 250r/min;
(5) thickening filtration: will in thickener, concentrate through the leaching ore pulp after above-mentioned steps (4) acidleach, collect supernatant, the underflow after concentrating (solid content control＞45%) after press filtration, will be filtrated and supernatant merges, and washing lotion is returned leaching; After removal of impurities, extraction, reclaim wherein valuable metal manganese, copper, cobalt and nickel again through the electrodeposition method.The slip filtered while hot be will leach, filter cake and filtrating obtained.Weigh sample examination behind the filtration cakes torrefaction.Through detecting, the cobalt leaching yield reaches 87.3%.
More than among each embodiment, the component list of the ocean manganese nodule of using is as shown in table 3 below.
Table 3: the component list of ocean manganese nodule
More than among each embodiment, the component list of the cobalt-bearing crust of using is as shown in table 4 below.
Table 4: the component list of oceanic cobalt-rich crust
Claims (10)
1. method of from the metallic ore of seabed, extracting valuable metal may further comprise the steps:
(1) coarse crushing is dry: said seabed metallic ore is carried out coarse crushing earlier, then the mineral aggregate after the coarse crushing is carried out drying;
(2) levigate: the mineral aggregate that obtains after the above-mentioned steps (1) is levigate, obtain the breeze material;
(3) hydrogen reduction: the breeze material that obtains after the above-mentioned steps (2) is placed reaction bed, under heating condition, feed hydrogen and carry out reduction reaction;
(4) acidleach: will add to through the discharging after above-mentioned steps (3) reduction and carry out acidleach in the acid solution;
(5) thickening filtration: will concentrate through the leaching ore pulp after above-mentioned steps (4) acidleach, collect supernatant, the underflow after concentrating will be filtrated and said supernatant merging after press filtration, after removal of impurities, extraction, reclaim valuable metal wherein through the electrodeposition method again.
2. the method for from the metallic ore of seabed, extracting valuable metal according to claim 1, it is characterized in that: said seabed metallic ore is oceanic multi-metal nodule and/or cobalt-bearing crust, said valuable metal is one or more in manganese metal, copper, cobalt, the nickel.
3. the method for from the metallic ore of seabed, extracting valuable metal according to claim 1 is characterized in that in the said coarse crushing drying step, said coarse crushing is meant the metallic ore coarse crushing of said seabed to 30mm.
4. the method for from the metallic ore of seabed, extracting valuable metal according to claim 1 is characterized in that in the said coarse crushing drying step, said drying is meant the mineral aggregate after the coarse crushing is dried to moisture content below 18%.
5. the method for from the metallic ore of seabed, extracting valuable metal according to claim 2 is characterized in that:
When said seabed metallic ore is oceanic multi-metal nodule, saidly levigately be meant this oceanic multi-metal nodule levigately to 0.5mm, wherein the particle below the 0.1mm accounts for more than 60% of said breeze material quality;
When said seabed metallic ore is oceanic multi-metal nodule and cobalt-bearing crust; The mass ratio of said oceanic multi-metal nodule and cobalt-bearing crust is (1～4): 1; Saidly levigately be meant the compound of this oceanic multi-metal nodule and cobalt-bearing crust levigately to 0.5mm, wherein the particle below the 0.075mm accounts for more than 60% of said breeze material quality.
6. the method for from the metallic ore of seabed, extracting valuable metal according to claim 1; It is characterized in that; In the said hydrogen reduction step; Said heating condition is meant that the temperature of reaction of said reduction reaction is controlled at 380 ℃～580 ℃ more than the heat temperature raising to 380 ℃, and the time of reduction reaction is 15min～90min.
7. the method for from the metallic ore of seabed, extracting valuable metal according to claim 6; It is characterized in that; Said hydrogen reduction step is under protection of inert gas atmosphere, to carry out; The rare gas element that feeds and the volume ratio of said hydrogen are 1: (0.5～4), the ventilation flow rate scope of said rare gas element and said hydrogen is for feeding 3m by breeze material PM per ton
3～50m
3Calculate.
8. the method for from the metallic ore of seabed, extracting valuable metal according to claim 1; It is characterized in that; In the said step of acid dipping, the acid solution of selecting for use is sulphuric acid soln or is sulfuric acid-nitric acid mixing solutions that said vitriolic concentration is controlled at 150g/l～300g/l; The concentration of said nitric acid is controlled at 50g/l～150g/l, aerating oxygen in leach liquor simultaneously in the acidleach process.
9. the method for from the metallic ore of seabed, extracting valuable metal according to claim 8; It is characterized in that; In the said step of acid dipping, the temperature during said acidleach is 80 ℃～110 ℃, and the liquid-solid ratio during said acidleach is (5～10): 1; Said leaching time is 0.5h～3h, the stirring intensity 250r/min～600r/min during acidleach.
10. the method for from the metallic ore of seabed, extracting valuable metal according to claim 1 is characterized in that, in the said thickening filtration step, said concentrating is meant that the employing thickener concentrates, and the solid content that concentrates the said underflow in back is controlled at more than 35%.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111876586A (en) * | 2020-07-29 | 2020-11-03 | 北京科技大学 | Method for comprehensively recovering all elements by roasting and reducing ocean cobalt-rich crusts through biomass |
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| CN112280979A (en) * | 2020-11-19 | 2021-01-29 | 金川集团股份有限公司 | Method for enriching precious metals from multi-metal alloy material |
| CN113582242A (en) * | 2021-06-23 | 2021-11-02 | 长沙矿冶研究院有限责任公司 | Method for preparing nickel-cobalt-manganese ternary positive electrode material precursor by using oceanic polymetallic nodule |
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| CN115725865A (en) * | 2021-08-30 | 2023-03-03 | 深圳市金航深海矿产开发集团有限公司 | Method for extracting valuable metal by selectively reducing ocean polymetallic nodule |
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