CN113293306A - Preparation method of raw material for producing cupronickel B30 from copper-nickel slag - Google Patents
Preparation method of raw material for producing cupronickel B30 from copper-nickel slag Download PDFInfo
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- 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
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- C—CHEMISTRY; METALLURGY
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
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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
- C22B15/0026—Pyrometallurgy
- C22B15/0028—Smelting or converting
- C22B15/0052—Reduction smelting or converting
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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
- C22B15/0026—Pyrometallurgy
- C22B15/0054—Slag, slime, speiss, or dross treating
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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
- C22B15/0026—Pyrometallurgy
- C22B15/006—Pyrometallurgy working up of molten copper, e.g. refining
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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
- C22B23/02—Obtaining nickel or cobalt by dry processes
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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
- C22B23/06—Refining
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
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- 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
- C22B7/001—Dry processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
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- Y02P10/20—Recycling
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Abstract
The invention discloses a preparation method of a raw material for producing cupronickel B30 from copper-nickel slag, which comprises the steps of smelting by a direct current arc furnace, producing copper-nickel alloy by adding a fluxing agent and a reducing agent into a non-ferrous smelting intermediate material of the copper-nickel slag, and producing a qualified raw material for preparing cupronickel B30 by refining and impurity removal, wherein the chemical composition of the raw material meets the requirement of processing cupronickel B30 in GB/T5231-2012. The invention solves the problems of valuable metal loss, energy consumption loss and the like, and simultaneously enables the cupronickel B30 alloy to be widely applied in industry. The method adopts the direct current arc furnace for reduction smelting slagging and the refining impurity removal treatment of the copper-nickel alloy to produce the raw material which meets the requirement of producing the cupronickel B30 alloy, has short flow, low energy consumption and high recovery rate, can greatly reduce the cost of producing the copper-nickel alloy, is a new process for comprehensively developing and utilizing nonferrous smelting slag and preparing the cupronickel B30 alloy with low cost, and has important significance in wider industrial application of the cupronickel B30 alloy in the fields of shipbuilding, electric power, chemical engineering and the like.
Description
Technical Field
The invention relates to the technical field of smelting, and also relates to the technical field of resource recovery of valuable metals recovered by open-circuit treatment of non-ferrous smelting intermediate materials, in particular to a preparation method of a cupronickel B30 raw material produced from copper-nickel slag.
Background
The copper-nickel alloy is widely used in various fields such as heat exchangers and condensers in seawater pipelines, desalination plants, power plants, and ship hulls, by virtue of its good corrosion resistance, excellent processability, and excellent thermal conductivity. The cupronickel B30 is a copper-based alloy with nickel as the main additive element, is silvery white and has metallic luster, so it is named cupronickel. The copper and the nickel can be dissolved with each other to form a continuous solid solution, are constant alpha-single phase alloy, have good corrosion resistance, medium strength and high plasticity, can be processed by hot and cold state pressure, have good electrical property, are widely used in the fields of shipbuilding, petrochemical industry, electrical appliances, instruments, appliances, daily necessities, artware and the like, are used as corrosion-resistant structural members, and are also important resistance and thermocouple alloys. The chemical components (Ni + Co) of the cupronickel B30 alloy are 29.00-33.00%, Fe0.40-2.30%, Mn1.00-2.50%, S0.01-0.03%, C0.05%, and Cu in balance, and the total amount of impurities are as follows: 0.60-2.50%. The traditional production process of the cupronickel B30 alloy takes electrolytic nickel, electrolytic copper and pure iron as raw materials, and carries out melting and material production through melting equipment such as an intermediate frequency furnace, and the like.
In the secondary copper concentrate treatment, the intermediate material copper-nickel slag (Cu 30%, Ni17.00%, Fe6.00%, Co0.10%, S0.20%, CaO2.60%, MgO1.60%, SiO 0) produced by removing nickel by pure oxygen blowing in a Kaldo furnace is adopted220.00%) of the prior art, the process flow is complex, the cost is high, the loss of valuable metals is large, the treatment capacity is limited, a large amount of funds are accumulated, and the like, the copper-nickel alloy obtained by adopting the new process of open-circuit treatment of direct-current arc furnace smelting can be subjected to impurity removal refining such as desulfurization, decarburization and the like to obtain the low-iron copper-nickel alloy, and the chemical components of the copper-nickel alloy are as follows: cu65.00-67.90 percent of Cu65.00-32.90 percent of Ni30.00-32.78 percent of Ni0.90-1.50 percent of Fe0.01-0.02 percent of S, 0.05 percent of C and less than 2.5 percent of impurity total amount, thus meeting the requirements of raw materials for producing the cupronickel B30 alloy.
Therefore, the copper-nickel slag is subjected to reduction smelting slagging in a direct current electric arc furnace and refining impurity removal treatment on the copper-nickel alloy to produce the raw material meeting the requirement of producing the cupronickel B30 alloy, the process flow is short, the energy consumption is low, the recovery rate is high, the copper-nickel alloy is a copper-nickel alloy with lower cost, the addition amount of the nickel, the copper and the pure iron can be replaced or reduced, the cost for producing the copper-nickel alloy can be greatly reduced, the process is not only comprehensive development and utilization of nonferrous smelting slag, but also a new process for preparing the cupronickel B30 alloy with low cost is developed, and the cupronickel B30 alloy has important significance in wider industrial application in the fields of shipbuilding, electric power, chemical industry and the like.
Disclosure of Invention
The invention aims to solve the technical problems that the cost of a cupronickel B30 alloy raw material is high, elements such as copper, nickel, iron and the like cannot be completely homogenized and the like in the prior art, and aims to provide a preparation method for producing a cupronickel B30 raw material from copper-nickel slag.
The purpose of the invention is realized by the following technical scheme:
a preparation method of a raw material for producing cupronickel B30 from copper-nickel slag comprises the following process steps:
a. crushing the copper-nickel-containing slag material to about 50mm, and drying to obtain water with the water content of less than 10%;
b. mixing the dried copper-nickel slag material, the reducing agent, the fluxing agent and the like in proportion, and adding the mixture into a direct current electric arc furnace;
c. controlling the temperature of a direct current arc furnace to be 1380-1500 ℃, feeding for 30-60 minutes, keeping the temperature for 30-60 minutes, and separating slag from copper-nickel alloy;
d. and the copper-nickel alloy is subjected to desulfurization, decarburization and impurity removal refining by using equipment such as an AOD furnace to prepare a qualified cupronickel B30 raw material.
And further, in the step b, the addition amount of the reducing agent is 5-7.5% of the dry-based copper-nickel slag.
And further, in the step b, the adding amount of the fluxing agent is 13-15% of the dry-based copper-nickel slag.
Further, the fluxing agent in the step b is limestone.
Further, the reducing agent in the step b is pulverized coal.
Further, the desulfurizing agent in the step d is limestone and fluorite.
The invention has the advantages and beneficial effects that:
the invention carries out reduction smelting enrichment on nonferrous intermediate materials containing copper and nickel oxide and a reducing agent to produce the copper-nickel alloy according to the direct current electric arc furnace technology, carries out component fine adjustment on the copper-nickel alloy, then carries out reduction desulfurization, oxygen blowing decarburization and other refining and impurity removal, and then carries out casting after chemical components meet the component requirements of a raw material of white copper B30.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A preparation method of a raw material for producing cupronickel B30 from copper-nickel slag comprises the following process steps:
a. crushing the copper-nickel-containing slag material to about 50mm, and drying to obtain water with the water content of less than 10%;
b. mixing the dried copper-nickel slag material, the reducing agent, the fluxing agent and the like in proportion, and adding the mixture into a direct current electric arc furnace;
c. controlling the temperature of a direct current arc furnace to be 1380-1500 ℃, feeding for 30-60 minutes, keeping the temperature for 30-60 minutes, and separating slag from copper-nickel alloy;
d. and the copper-nickel alloy is subjected to desulfurization, decarburization and impurity removal refining by using equipment such as an AOD furnace to prepare a qualified cupronickel B30 raw material.
And further, in the step b, the addition amount of the reducing agent is 5-7.5% of the dry-based copper-nickel slag.
And further, in the step b, the adding amount of the fluxing agent is 13-15% of the dry-based copper-nickel slag.
Further, the fluxing agent in the step b is limestone.
Further, the reducing agent in the step b is pulverized coal.
Further, the desulfurizing agent in the step d is limestone and fluorite.
Example 1
Firstly, naturally drying the copper-nickel slag, weighing a certain amount of dry-based copper-nickel slag with the water content less than 10%, weighing a reducing agent according to 5% of the amount of the copper-nickel slag, and weighing a fluxing agent according to 13% of the amount of the copper-nickel slag; weighing all the materials, mixing a small amount of the materials, adding the materials into a thermal state direct current electric arc furnace in batches, controlling the smelting temperature of the direct current electric arc furnace to 1380 ℃, the feeding time to 30 minutes and the heat preservation time to 30 minutes, separating slag from copper-nickel alloy after the heat preservation is finished, and transferring the copper-nickel alloy to an AOD furnace; weighing a desulfurizing agent according to 1% of the alloy amount; blowing oxygen for decarburization, adding a desulfurizing agent in batches for desulfurization and the like for refining, casting after impurity removal, cooling and sampling chemical composition analysis, wherein the results are shown in Table 1.
TABLE 1 comparison of copper-nickel alloys with GB-B30 chemical composition (%)
Example 2
Firstly, naturally drying the copper-nickel slag, weighing a certain amount of dry-based copper-nickel slag with the water content less than 10%, weighing a reducing agent according to 6% of the amount of the copper-nickel slag, and weighing a fluxing agent according to 14% of the amount of the copper-nickel slag; weighing all the materials, mixing a small amount of the materials, adding the materials into a thermal state direct current electric arc furnace in batches, controlling the smelting temperature of the direct current electric arc furnace to be 1450 ℃, the charging time to be 50 minutes and the heat preservation time to be 50 minutes, separating slag from copper-nickel alloy after the heat preservation is finished, and transferring the copper-nickel alloy to an AOD furnace; weighing a desulfurizing agent according to 1% of the alloy amount; blowing oxygen for decarburization, adding a desulfurizing agent in batches for desulfurization and the like for refining, casting after impurity removal, cooling and sampling chemical composition analysis, wherein the results are shown in Table 2.
TABLE 2 comparison of copper-nickel alloys with GB-B30 chemistry (%)
Example 3
Firstly, naturally drying the copper-nickel slag, weighing a certain amount of dry copper-nickel slag with the water content less than 10%, respectively weighing a reducing agent according to 7.5% of the amount of the copper-nickel slag, and respectively weighing a fluxing agent according to 15% of the amount of the copper-nickel slag; weighing all the materials, mixing a small amount of the materials, adding the materials into a thermal state direct current electric arc furnace in batches, controlling the smelting temperature of the direct current electric arc furnace to be 1500 ℃, the feeding time to be 60 minutes and the heat preservation time to be 60 minutes, separating slag from copper-nickel alloy after the heat preservation is finished, and transferring the copper-nickel alloy to an AOD furnace; weighing a desulfurizing agent according to 2% of the alloy amount; blowing oxygen for decarburization, adding a desulfurizing agent in batches for desulfurization and the like for refining, casting after impurity removal, cooling and sampling chemical composition analysis, wherein the results are shown in Table 3.
TABLE 3 comparison of copper-nickel alloys with GB-B30 chemistry (%)
Claims (6)
1. A preparation method of a raw material for producing cupronickel B30 from copper-nickel slag is characterized by comprising the following steps:
a. crushing the copper-nickel-containing slag material to about 50mm, and drying to obtain water with the water content of less than 10%;
b. mixing the dried copper-nickel slag material, the reducing agent, the fluxing agent and the like in proportion, and adding the mixture into a direct current electric arc furnace;
c. controlling the temperature of a direct current arc furnace to be 1380-1500 ℃, feeding for 30-60 minutes, keeping the temperature for 30-60 minutes, and separating slag from copper-nickel alloy;
d. and (3) carrying out impurity removal refining such as desulfurization, decarburization and the like on the copper-nickel alloy through equipment such as an AOD furnace and the like to prepare the qualified cupronickel B30 raw material.
2. The preparation method of the raw material for producing cupronickel B30 from the copper-nickel slag according to claim 1, wherein the method comprises the following steps: and in the step b, the addition amount of the reducing agent is 5-7.5% of the dry-based copper-nickel slag.
3. The preparation method of the raw material for producing cupronickel B30 from the copper-nickel slag according to claim 1, wherein the method comprises the following steps: and in the step b, the adding amount of the fluxing agent is 13-15% of the dry-based copper-nickel slag.
4. The preparation method of the raw material for producing cupronickel B30 from the copper-nickel slag according to claim 1, wherein the method comprises the following steps: and the fluxing agent in the step b is limestone.
5. The preparation method of the raw material for producing cupronickel B30 from the copper-nickel slag according to claim 1, wherein the method comprises the following steps: and the reducing agent in the step b is pulverized coal.
6. The preparation method of the raw material for producing cupronickel B30 from the copper-nickel slag according to claim 1, wherein the method comprises the following steps: and d, using limestone and fluorite as the desulfurizing agent in the step d.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114381607A (en) * | 2021-12-31 | 2022-04-22 | 金川镍钴研究设计院有限责任公司 | Comprehensive utilization and treatment method for Kaldo furnace slag |
| CN114657412A (en) * | 2022-03-15 | 2022-06-24 | 金川镍钴研究设计院有限责任公司 | Method for producing BFe10-1-1 ingot casting at low cost |
| CN114875245A (en) * | 2022-05-30 | 2022-08-09 | 金川镍钴研究设计院有限责任公司 | Method for producing 4J29 alloy raw material from nickel-cobalt slag |
| CN114990348A (en) * | 2022-05-30 | 2022-09-02 | 金川镍钴研究设计院有限责任公司 | Method for producing blister copper from copper-nickel slag |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN114657412A (en) * | 2022-03-15 | 2022-06-24 | 金川镍钴研究设计院有限责任公司 | Method for producing BFe10-1-1 ingot casting at low cost |
| CN114875245A (en) * | 2022-05-30 | 2022-08-09 | 金川镍钴研究设计院有限责任公司 | Method for producing 4J29 alloy raw material from nickel-cobalt slag |
| CN114990348A (en) * | 2022-05-30 | 2022-09-02 | 金川镍钴研究设计院有限责任公司 | Method for producing blister copper from copper-nickel slag |
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