CN114672641A - Dressing and smelting combined process for refractory dip-dyed copper-nickel oxide ore - Google Patents
Dressing and smelting combined process for refractory dip-dyed copper-nickel oxide ore Download PDFInfo
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- CN114672641A CN114672641A CN202210395442.5A CN202210395442A CN114672641A CN 114672641 A CN114672641 A CN 114672641A CN 202210395442 A CN202210395442 A CN 202210395442A CN 114672641 A CN114672641 A CN 114672641A
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- LDSIKPHVUGHOOI-UHFFFAOYSA-N copper;oxonickel Chemical compound [Ni].[Cu]=O LDSIKPHVUGHOOI-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000003723 Smelting Methods 0.000 title claims abstract description 17
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 124
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 87
- 229910052802 copper Inorganic materials 0.000 claims abstract description 84
- 239000010949 copper Substances 0.000 claims abstract description 84
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 62
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 54
- 238000002386 leaching Methods 0.000 claims abstract description 51
- 238000000227 grinding Methods 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 229910000570 Cupronickel Inorganic materials 0.000 claims abstract description 25
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000001914 filtration Methods 0.000 claims abstract description 21
- 238000005406 washing Methods 0.000 claims abstract description 21
- 230000001590 oxidative effect Effects 0.000 claims abstract description 19
- 230000001376 precipitating effect Effects 0.000 claims abstract description 18
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 16
- 229910052742 iron Inorganic materials 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000003647 oxidation Effects 0.000 claims abstract description 13
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 claims abstract description 11
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 claims abstract description 9
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 8
- 239000007800 oxidant agent Substances 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 8
- 229910052979 sodium sulfide Inorganic materials 0.000 claims abstract description 8
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000000151 deposition Methods 0.000 claims abstract description 7
- 238000002791 soaking Methods 0.000 claims abstract description 7
- 239000002244 precipitate Substances 0.000 claims description 24
- 238000001556 precipitation Methods 0.000 claims description 11
- 229910000510 noble metal Inorganic materials 0.000 claims 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- IYRDVAUFQZOLSB-UHFFFAOYSA-N copper iron Chemical compound [Fe].[Cu] IYRDVAUFQZOLSB-UHFFFAOYSA-N 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- -1 sericite Chemical compound 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229910052889 tremolite Inorganic materials 0.000 description 1
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- 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
- C22B1/00—Preliminary treatment of ores or scrap
-
- 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
- C22B15/0084—Treating solutions
- C22B15/0089—Treating solutions by chemical methods
- C22B15/0091—Treating solutions by chemical methods by cementation
-
- 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
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- 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
- C22B23/0453—Treatment or purification of solutions, e.g. obtained by leaching
- C22B23/0461—Treatment or purification of solutions, e.g. obtained by leaching by chemical methods
- C22B23/0469—Treatment or purification of solutions, e.g. obtained by leaching by chemical methods by chemical substitution, e.g. by cementation
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention relates to a dressing and smelting combined process for refractory dip-dyed copper-nickel oxide ores, which comprises the following steps: firstly, grinding ore: grinding the dip-dyed copper-nickel oxide ore to obtain ore with the grinding fineness of less than 0.074mm and the content of 20-40%; secondly, pool leaching: adding water into the obtained ore, then adding sulfuric acid until the ore is immersed, standing and soaking for 25-30 days to obtain a copper-nickel leaching solution; thirdly, replacing copper by iron powder in the copper-nickel leaching solution: adding excessive iron powder into the copper-nickel leaching solution to replace copper, and filtering and washing to obtain copper sponge and copper replacement solution respectively; fourth, oxidizing and precipitating iron in the copper replacement liquid: adding an oxidant into the copper replacement liquid, and heating the copper replacement liquid after the oxidation is completed; then adding calcium carbonate powder, keeping the temperature for 2 hours, washing and filtering to respectively obtain iron filter residue and nickel-containing pregnant solution; fifthly, depositing nickel from the nickel-containing pregnant solution: adding sodium hydrosulfide or sodium sulfide into the nickel-containing pregnant solution, washing and filtering to respectively obtain nickel sulfide and residual liquid. The invention is simple, low in cost and convenient for industrial popularization and application.
Description
Technical Field
The invention relates to the technical field of mineral processing, in particular to a dressing and smelting combined process of refractory dip-dyed copper-nickel oxide ores.
Background
The dip-dyed copper-nickel oxide ore belongs to the industrial type of super-basic rock weathered shell copper-nickel ore, and has high copper and nickel oxidation rate. The gangue minerals are altered minerals such as serpentine, talc, tremolite, chlorite, sericite, carbonate, celadon and the like, and the gangue minerals are severely weathered, contain large mud, have large influence on the recovery of copper and nickel and belong to more difficultly selected ores.
At present, the documents for recycling copper-nickel oxide ores at home and abroad are few, and the conventional flotation is difficult to recycle copper and nickel; the stirring, heating and acid leaching conditions are harsh, the production cost is high, and the requirement on equipment is high; and heap leaching and column leaching of ore have large mud and poor permeability, which is difficult to realize.
Disclosure of Invention
The invention aims to solve the technical problem of providing a simple and low-cost combined process for selecting and smelting refractory dip-dyed copper-nickel oxide ores.
In order to solve the problems, the invention provides a dressing and smelting combined process of refractory dip-dyed copper-nickel oxide ore, which comprises the following steps:
firstly, grinding ore:
grinding the dip-dyed copper nickel oxide ore, wherein the grinding concentration is 50% -60%, and the ore with the grinding fineness of less than 0.074mm and the content of 20% -40% is obtained;
secondly, pool leaching:
adding water into the ore obtained in the step, then adding sulfuric acid with the concentration of 30-40 g/L until the ore is immersed, standing and soaking for 25-30 days to obtain a copper-nickel leaching solution with the copper leaching rate of 81-83% and the nickel leaching rate of 59-61%;
thirdly, replacing copper by iron powder in the copper-nickel leaching solution:
adding excessive iron powder into the copper-nickel leaching solution at the temperature of 50-60 ℃ to replace copper, and filtering and washing to obtain copper sponge and copper replacement solution respectively;
fourth, oxidizing and precipitating iron in the copper replacement liquid:
adding an oxidant into the copper replacement solution according to the dosage of 15-17 g/L to perform Fe2+Oxidizing for 30-45 min; heating the copper replacement solution to 40-50 ℃ after complete oxidation to enable Fe3+Precipitating; then adding calcium carbonate powder according to the using amount of 40-45 g/L, keeping the heating time for 2 hours to obtain a precipitate A, and washing and filtering the precipitate A to respectively obtain iron filter residue and nickel-containing pregnant solution;
fifthly, depositing nickel from the nickel-containing pregnant solution:
and adding sodium hydrosulfide or sodium sulfide into the nickel-containing pregnant solution to obtain a precipitate B, and washing and filtering the precipitate B to respectively obtain nickel sulfide and residual liquid.
The method comprises the steps of enabling copper grade in the dip-dyed copper oxide nickel ore to be 0.89-1.1%, enabling nickel grade to be 0.55-0.7%, enabling the oxidation rate of copper to be 72-75% and enabling the oxidation rate of nickel to be 95-98%.
The method comprises the step of mixing the water and the ore in a mass ratio of 4-5: 1-0.5.
The ratio of the copper-nickel leaching solution to the iron powder in the step three is 1L: 6-9 g.
And (3) replacing in the step (iii) for 35-40 min.
The ratio of the nickel-containing pregnant solution to sodium hydrosulfide or sodium sulfide in the step fifthly is 1L: 5-6 g.
The precipitation temperature in the step fifthly is 60-70 ℃, and the precipitation time is 40-50 min.
Compared with the prior art, the invention has the following advantages:
1. the invention aims at the characteristics of large mud content and high oxidation rate of the dip-dyed copper-nickel oxide ore, and adopts tank leaching to recover copper and nickel.
2. Because the fineness has larger influence on the tank leaching, the too fine permeability is poor, and the too coarse leaching rate is lower, the invention adopts ore with the ore grinding fineness of less than 0.074mm and the content of 20-40% to perform the tank leaching, thereby obtaining higher leaching rates of copper and nickel.
3. The invention controls the dosage of the oxidant to be 15-17 g/L, the oxidation time to be 30-45 min, and Fe3+The precipitation temperature is 40-50 ℃, the dosage of the calcium carbonate powder is 40-45 g/L, and the heating time is 2h, so that the loss of nickel in the iron removal operation is reduced.
4. The invention adopts a combined process of rough grinding, tank leaching, iron powder replacement, copper-iron oxidation, precipitation and nickel precipitation, realizes the recovery of copper and nickel, and realizes the separation of copper and nickel, and simultaneously has the advantages of simpler process conditions, less investment, low cost, low requirement on equipment, easier realization in production and convenient industrial popularization and application.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a flow chart of the present invention.
Detailed Description
As shown in figure 1, the dressing and smelting combined process of the refractory dip-dyed copper-nickel oxide ore comprises the following steps:
the method comprises the steps of grinding:
and grinding the dip-dyed copper-nickel oxide ore by adopting a wet ball mill, wherein the grinding concentration is 50-60%, and the ore with the grinding fineness of less than 0.074mm and the content of 20-40% is obtained. In the dip-dyed copper oxide nickel ore, the copper grade is 0.89-1.1%, the nickel grade is 0.55-0.7%, the oxidation rate of copper is 72-75%, and the oxidation rate of nickel is 95-98%.
Secondly, pool leaching:
firstly adding water into the obtained ore to enable the liquid-solid ratio of the ore to be 4-5: 1-0.5, then adding sulfuric acid with the concentration of 30-40 g/L until the ore is immersed, standing and soaking for 25-30 days, and obtaining a copper-nickel leaching solution with the copper leaching rate of 81-83% and the nickel leaching rate of 59-61%.
Thirdly, replacing copper by iron powder in the copper-nickel leaching solution:
adding excessive iron powder into a copper-nickel leaching solution at the temperature of 50-60 ℃ according to the using amount of 6-9 g/L for replacing copper, wherein the replacing time is 35-40 min, and filtering and washing to respectively obtain sponge copper and a copper replacing solution; wherein the replacement rate of copper is more than 97 percent, and the grade of the generated sponge copper is more than 92 percent.
Fourth, iron in the copper replacement liquid is oxidized and precipitated:
since the copper replacement liquid contains Ni2+、Fe2+ 、Fe3+And so on, adding an oxidizing agent in an amount of 15 to 17 g/L to the copper replacement solution to carry out Fe2+Oxidizing for 30-45 min; when Fe is contained in the copper replacement liquid2+Fully oxidized into Fe3+Heating the copper displacement solution to 40-50 deg.C to make Fe3+Precipitating; and then adding calcium carbonate powder according to the using amount of 40-45 g/L, keeping the temperature for 2 hours to obtain a precipitate A, and washing and filtering the precipitate A to obtain iron filter residue and nickel-containing pregnant solution respectively.
Fifthly, depositing nickel from the nickel-containing pregnant solution:
adding sodium hydrosulfide or sodium sulfide into the nickel-containing pregnant solution according to the dosage of 5-6 g/L, precipitating at 60-70 ℃ for 40-50 min, obtaining a precipitate B after nickel is fully precipitated, and washing and filtering the precipitate B to respectively obtain nickel sulfide and residual liquid. Wherein the precipitation rate of nickel is more than 86 percent, and the grade of the generated nickel sulfide is more than 24 percent.
Example 1 Sinkiang Yiwu certain copper oxide nickel ore contains 0.89% copper and 0.55% nickel. The research of the process mineralogy proves that the ore belongs to dip-dyed copper oxide nickel ore, the ore is seriously weathered, the mud content is large, and the ore is difficult to select.
A dressing and smelting combined process for refractory dip-dyed copper-nickel oxide ores comprises the following steps:
firstly, grinding ore:
and (3) grinding the dip-dyed copper-nickel oxide ore by adopting a wet ball mill, wherein the grinding concentration is 55%, and the ore with the grinding fineness of less than 0.074mm and the content of 25% is obtained.
Secondly, pool leaching:
firstly adding water into the ore obtained in the step (A) to enable the liquid-solid ratio of the ore to be 4:1, then adding 35g/L sulfuric acid into a container until the ore is immersed, standing and soaking for 25 days to obtain a copper-nickel leaching solution with the copper leaching rate of 81.27% and the nickel leaching rate of 59.59%.
Thirdly, replacing copper by iron powder in the copper-nickel leaching solution:
adding excessive iron powder into 3L of copper-nickel leaching solution at 50 ℃ to replace copper, wherein the using amount of the iron powder is 6g/L, the replacement time is 35min, and filtering and washing to respectively obtain sponge copper and copper replacement solution. Wherein the substitution rate of copper is 97.35 percent, and the grade of the produced sponge copper is 92.05 percent.
Fourth, oxidizing and precipitating iron in the copper replacement liquid:
since the copper replacement liquid contains Ni2+、Fe2+ 、Fe3+And so on, adding an oxidant hydrogen peroxide into the copper replacement liquid according to the dosage of 15g/L to carry out Fe2+Oxidizing for 30 min; when Fe is contained in the copper replacement liquid2+Fully oxidized into Fe3+Heating the copper replacement solution to 50 ℃ to cause Fe3+Precipitating; then adding calcium carbonate powder according to the dosage of 40g/L, keeping the temperature for 2h to obtain a precipitate A, and washing and filtering the precipitate A by water to respectively obtain iron filter residue and nickel-containing pregnant solution.
Fifthly, depositing nickel from the nickel-containing pregnant solution:
adding 5g/L sodium hydrosulfide into 1L of nickel-containing pregnant solution, precipitating at 60 deg.C for 40min to obtain precipitate B after nickel is fully precipitated, washing the precipitate B with water, and filtering to obtain nickel sulfide and residual liquid. Wherein the precipitation rate of nickel is 86.78%, and the grade of the generated nickel sulfide is 24.32%.
Example 2 a certain nickel oxide ore in Yunnanjiang contains 0.68% of copper and 0.83% of nickel. The research of process mineralogy proves that the ore belongs to dip-dyed copper oxide nickel ore, and the ore is difficult to select.
A dressing and smelting combined process for refractory dip-dyed copper-nickel oxide ores comprises the following steps:
firstly, grinding ore:
and (3) grinding the dip-dyed copper-nickel oxide ore by adopting a wet ball mill, wherein the grinding concentration is 58%, and the ore with the grinding fineness of less than 0.074mm and the content of 40% is obtained.
Secondly, pool leaching:
firstly adding water into the obtained ore to enable the liquid-solid ratio of the ore to be 10:1, then adding 30g/L sulfuric acid into a container until the ore is immersed, standing and soaking for 30 days to obtain a copper-nickel leaching solution with the copper leaching rate of 82.65% and the nickel leaching rate of 60.54%.
Thirdly, replacing copper by iron powder in the copper-nickel leaching solution:
adding excessive iron powder into 3L of copper-nickel leaching solution at 60 ℃ to replace copper, wherein the using amount of the iron powder is 8g/L, the replacement time is 40min, and filtering and washing to respectively obtain sponge copper and copper replacement solution. Wherein the replacement rate of copper is 98.12%, and the grade of the produced sponge copper is 93.14%.
Fourth, oxidizing and precipitating iron in the copper replacement liquid:
since the copper replacement liquid contains Ni2+、Fe2+ 、Fe3+And so on, adding an oxidant hydrogen peroxide into the copper replacement solution according to the dosage of 16 g/L to carry out Fe2+Oxidizing for 40 min; when Fe is contained in the copper replacement liquid2+Fully oxidized into Fe3+Heating the copper replacement solution to 45 ℃ to cause Fe3+Precipitating; then adding calcium carbonate powder according to the dosage of 44g/L, keeping the temperature for 2h to obtain a precipitate A, and washing and filtering the precipitate A by water to respectively obtain iron filter residue and nickel-containing pregnant solution.
Fifthly, depositing nickel from the nickel-containing pregnant solution:
adding 5.5g/L sodium hydrosulfide or sodium sulfide into 1L of nickel-containing pregnant solution, precipitating at 65 ℃ for 45min, fully precipitating nickel to obtain precipitate B, washing the precipitate B with water, and filtering to obtain nickel sulfide and residual liquid respectively. Wherein the precipitation rate of nickel is 87.15 percent, and the grade of the generated nickel sulfide is 25.64 percent.
Example 3 a certain foreign copper-nickel oxide ore contains 1.12% copper and 0.89% nickel. The research of the process mineralogy proves that the ore belongs to a dip-dyed copper nickel oxide ore, the industrial type belongs to super-basic rock weathered shell type copper-nickel ore, and the ore is difficult to separate.
A dressing and smelting combined process for refractory dip-dyed copper-nickel oxide ores comprises the following steps:
firstly, grinding ore:
and (3) grinding the dip-dyed copper-nickel oxide ore by adopting a wet ball mill, wherein the grinding concentration is 60%, and the ore with the grinding fineness of less than 0.074mm and the content of 20% is obtained.
Secondly, pool leaching:
firstly adding water into the obtained ore to ensure that the liquid-solid ratio is 6:1, then adding 40g/L sulfuric acid into a container until the ore is immersed, standing and soaking for 28 days to obtain a copper-nickel leaching solution with the copper leaching rate of 81.27% and the nickel leaching rate of 59.59%.
Thirdly, replacing copper by iron powder in the copper-nickel leaching solution:
adding excessive iron powder into 3L of copper-nickel leaching solution at 60 ℃ to replace copper, wherein the using amount of the iron powder is 9g/L, the replacement time is 40min, and filtering and washing to obtain sponge copper and copper replacement solution respectively. Wherein the replacement rate of copper is 97.44 percent, and the grade of the generated sponge copper is 92.34 percent.
Fourth, oxidizing and precipitating iron in the copper replacement liquid:
since the copper replacement liquid contains Ni2+、Fe2+ 、Fe3+And so on, adding an oxidant hydrogen peroxide into the copper replacement liquid according to the dosage of 17 g/L to carry out Fe2+Oxidizing for 45 min; when Fe is contained in the copper replacement liquid2+Fully oxidized into Fe3+Heating the copper replacement solution to 40 ℃ to cause Fe3+Precipitating; then adding calcium carbonate powder according to the using amount of 45g/L, keeping the heating time for 2 hours to obtain a precipitate A, and washing and filtering the precipitate A by water to respectively obtain iron filter residue and nickel-containing pregnant solution.
Fifthly, depositing nickel from the nickel-containing pregnant solution:
adding 6g/L of sodium hydrosulfide or sodium sulfide into 1L of nickel-containing pregnant solution, precipitating at 70 ℃ for 50 min, fully precipitating nickel to obtain precipitate B, washing the precipitate B with water, and filtering to respectively obtain nickel sulfide and residual liquid. Wherein the precipitation rate of nickel is 87.15 percent, and the grade of the generated nickel sulfide is 26.54 percent.
Claims (7)
1. A dressing and smelting combined process for refractory dip-dyed copper-nickel oxide ores comprises the following steps:
the method comprises the steps of grinding:
grinding the dip-dyed copper nickel oxide ore, wherein the grinding concentration is 50% -60%, and the ore with the grinding fineness of less than 0.074mm and the content of 20% -40% is obtained;
secondly, pool leaching:
adding water into the ore obtained in the step, then adding sulfuric acid with the concentration of 30-40 g/L until the ore is immersed, standing and soaking for 25-30 days to obtain a copper-nickel leaching solution with the copper leaching rate of 81-83% and the nickel leaching rate of 59-61%;
thirdly, replacing copper by iron powder in the copper-nickel leaching solution:
adding excessive iron powder into the copper-nickel leaching solution at the temperature of 50-60 ℃ to replace copper, and filtering and washing to obtain copper sponge and copper replacement solution respectively;
fourth, oxidizing and precipitating iron in the copper replacement liquid:
adding an oxidant into the copper replacement solution according to the dosage of 15-17 g/L to perform Fe2+Oxidizing for 30-45 min; heating the copper replacement solution to 40-50 ℃ after complete oxidation to enable Fe3+Precipitating; then adding calcium carbonate powder according to the using amount of 40-45 g/L, keeping the heating time for 2 hours to obtain a precipitate A, and washing and filtering the precipitate A to respectively obtain iron filter residue and nickel-containing pregnant solution;
fifthly, depositing nickel from the nickel-containing pregnant solution:
and adding sodium hydrosulfide or sodium sulfide into the nickel-containing pregnant solution to obtain a precipitate B, and washing and filtering the precipitate B to respectively obtain nickel sulfide and residual liquid.
2. The combined process for dressing and smelting refractory dip-dyed copper-nickel oxide ore according to claim 1, wherein: the method comprises the steps of enabling copper grade in the dip-dyed copper oxide nickel ore to be 0.89-1.1%, enabling nickel grade to be 0.55-0.7%, enabling the oxidation rate of copper to be 72-75% and enabling the oxidation rate of nickel to be 95-98%.
3. The combined process for dressing and smelting refractory dip-dyed copper-nickel oxide ore according to claim 1, wherein the combined process comprises the following steps: the method comprises the following steps that the mass ratio of the reclaimed water to the ore is 4-5: 1-0.5.
4. The combined process for dressing and smelting refractory dip-dyed copper-nickel oxide ore according to claim 1, wherein the combined process comprises the following steps: the ratio of the copper-nickel leaching solution to the iron powder in the step three is 1L: 6-9 g.
5. The combined process for dressing and smelting refractory dip-dyed copper-nickel oxide ore according to claim 1, wherein: and step three, replacing time is 35-40 min.
6. The combined process for dressing and smelting refractory dip-dyed copper-nickel oxide ore according to claim 1, wherein: the ratio of the nickel-containing noble metal liquid to sodium hydrosulfide or sodium sulfide in the step I is 1L: 5-6 g.
7. The combined process for dressing and smelting refractory dip-dyed copper-nickel oxide ore according to claim 1, wherein the combined process comprises the following steps: the precipitation temperature in the step fifthly is 60-70 ℃, and the precipitation time is 40-50 min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210395442.5A CN114672641A (en) | 2022-04-15 | 2022-04-15 | Dressing and smelting combined process for refractory dip-dyed copper-nickel oxide ore |
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| CN202210395442.5A CN114672641A (en) | 2022-04-15 | 2022-04-15 | Dressing and smelting combined process for refractory dip-dyed copper-nickel oxide ore |
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