CN114214526B - Device and method for separating cobalt from cobalt-containing alloy by using segregation crystallization method - Google Patents
Device and method for separating cobalt from cobalt-containing alloy by using segregation crystallization method Download PDFInfo
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Abstract
The invention discloses a device and a method for separating cobalt from a cobalt-containing alloy by using a segregation crystallization method, and relates to the technical field of metallurgy. The device comprises a separation bag, a vibrator is arranged in the middle of the separation bag, an electromagnetic stirrer is arranged below the separation bag, a bag bottom heater is arranged at the bottom of the separation bag, the separation bag is placed on a bag bottom water cooling device, and an electromagnet is arranged below the bag bottom water cooling device. By utilizing the principles of different Curie point temperatures and crystallization segregation of various metal elements in the cobalt-containing alloy, the alloy is put into a special separation device in a molten hot state to be vibrated, stood, controlled in temperature, added with a crystal inducing agent, subjected to cobalt crystal segregation, electromagnetically adsorbed and discharged, and finally, cobalt in the alloy is subjected to crystal enrichment at the bottom of a separation bag and is discharged at a raised temperature, so that the aim of separating the cobalt is fulfilled. The invention saves investment, is environment-friendly and low-carbon, and has no waste liquid and waste residue generated by the traditional wet process. The method is favorable for solving the problem of difficult recovery of cobalt in the cobalt-containing alloy, and is suitable for popularization in the nickel-cobalt smelting industry.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a device and a method for separating cobalt from a cobalt-containing alloy by using a segregation crystallization method, which are particularly suitable for enriching and separating cobalt from a cobalt-containing alloy product and cobalt-containing battery metal waste obtained by using laterite nickel ore pyrometallurgy.
Background
Nickel and cobalt are strategic resources of China and are one of the core raw materials of new energy batteries. At present, most of nickel products in China adopt laterite-nickel ore to smelt and produce ferronickel alloy, the typical process is to smelt high-grade laterite-nickel ore (Ni in dry raw ore is more than 1.3 wt%) by adopting a RKEF (Rotary kiln electric furnace) technology of a Rotary kiln and an electric furnace, and meanwhile, some factories smelt low-grade laterite-nickel ore (Ni in dry raw ore is less than 1.2 wt%). The raw ore components of the common laterite nickel ore contain 0.01-0.1wt% of cobalt element, so that the smelting product contains 0.05-1.0wt% of cobalt element.
No matter the RKEF process or the blast furnace process is adopted, more than 90 percent of products are used as stainless steel raw materials: for example, the RKEF process produces alloy products for 300 series stainless steel (typical products contain about 8-12% nickel), while the blast furnace products produce 200 series stainless steel (typical products contain about 1-2% nickel).
Because the properties of iron, cobalt and nickel in the cobalt-containing alloy are similar and are limited by technology and economy at present, cobalt cannot be separated from the cobalt-containing alloy, and the cobalt in the alloy is directly brought into stainless steel by downstream processes.
In stainless steel, however, excessive amounts of cobalt are detrimental, mainly in two ways: firstly, stainless steel with cobalt content over 0.2wt% has large downstream processing deformation resistance, is difficult to process and has reduced welding performance, for example, stainless steel welding materials in certain nuclear power require cobalt content less than 0.20wt%; second, when the content of cobalt in the stainless steel is more than 0.3wt%, the pitting rate thereof is increased remarkably, indicating that cobalt may decrease the pitting corrosion resistance of the stainless steel.
Meanwhile, the problem of difficult separation and recovery is also encountered in the recovery of the cobalt-containing battery. For example, the separation and recovery of ternary materials of the nickel-cobalt-manganese ternary lithium ion battery anode material usually adopts a wet method, so that a large amount of waste liquid and waste residues are generated.
China is poor in cobalt resources, and most of the primary cobalt resources are mainly used for extracting cobalt from copper-nickel associated ores of nickel sulfide ores and Congo gold by adopting a wet process at present.
In 2020, the average price of cobalt is about 45 million RMB/ton, and the cobalt is a valuable metal resource, and has important strategic and economic significance for extracting the cobalt from the alloy smelted from the laterite-nickel ore. In addition to the expensive wet process technology which generates a lot of waste residues and waste water, a simple, environment-friendly and low-carbon device and method are needed, cobalt in a cobalt-containing alloy product is enriched and separated, waste of cobalt in a laterite-nickel ore pyrometallurgy product is reduced, and cobalt harm to downstream stainless steel is avoided.
Disclosure of Invention
The invention aims to provide a device and a method for separating cobalt from a cobalt-containing alloy by using a segregation crystallization method, so as to solve the problems in the background art.
The invention specifically adopts the following technical scheme for realizing the purpose:
the utility model provides an utilize device of segregation crystallization method separation cobalt from cobalt-containing alloy, includes separation package 2, separation package 2 top is equipped with heat preservation be built by contract 1, and separation package 2 middle part is equipped with vibrator 3, and separation package 2 below is equipped with electromagnetic agitator 4, and separation package 2 bottom is equipped with package end heater 5, and separation package 2 bottom is placed on package end water cooling plant 6, and package end water cooling plant 6 below is provided with electro-magnet 7.
The separation bag 2 is of an inverted cone structure, and the ratio of the lower surface area to the upper surface area of the cone is 1:5-100.
A fixed bracket 8 is arranged outside the separation bag 2.
The separation bag 2 comprises a bag ear 201 and a bag body 202 arranged in the bag ear, a bag body water cooling system 203 is arranged in the bag body 202, and a bag body temperature control heater 204 is arranged outside the bag body 202.
The bag body 202 is provided with a plurality of liquid discharge ports 205.
The bag body 202 is composed of a steel outer shell and a refractory material built inside the steel outer shell.
A method for separating cobalt from a cobalt-containing alloy by using a segregation crystallization method comprises the following steps:
1) By utilizing the principles of different Curie point temperatures and crystallization segregation of various elements in the cobalt-containing alloy, putting the cobalt-containing alloy into a separation bag 2 of the cobalt separation device in a molten hot state, and performing vibration homogenization, standing purification and deslagging through a vibrator 3;
2) Opening the ladle body water cooling system 203 to control the alloy temperature in the separation ladle 2 to be 1300-1320 ℃;
3) The liquid cobalt-containing alloy is enabled to be in the range of the crystallization point temperature thereof plus 100 ℃ by the ladle body temperature control heater 204;
4) Opening the electromagnetic stirrer 4, uniformly adding a cobalt crystal inducing agent into the separation bag 2, and gradually cooling to gradually generate segregation crystal nuclei of cobalt in the liquid alloy, wherein the nuclei collide with the bottom of the separation bag externally added with a magnetic field under the action of the electromagnetic stirrer 4;
5) Opening a ladle bottom water cooling device 6, and further controlling the temperature at the bottom of the separation ladle 2 to enable the temperature of the liquid alloy at the bottom to be within 1150 +/-50 ℃ of the Curie point of cobalt by matching with a ladle bottom heater 5, so as to further promote the crystal nucleus to grow;
6) And (3) opening the electromagnet 7, adsorbing large crystal nuclei by the magnetic force of the electromagnet 7 at the bottom of the cobalt separation device, so that the cobalt crystal nuclei are adsorbed at the bottom of the cobalt separation device by the magnetic force, enriched and cooled and solidified, continuously stirring the nonmagnetic non-cobalt alloy at the temperature of the step (4) until the non-cobalt alloy at the upper part of the separation bag is discharged through an upper discharge port, melting the cobalt-enriched alloy at the bottom of the separation bag under the heating of the bag bottom heater 5, and discharging the cobalt-enriched alloy through a lowest discharge port to complete the separation of cobalt in the alloy.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the device is simple, the occupied area is small, and the investment is small; the device designed by the invention can be directly arranged in a ferronickel smelting workshop for production, thereby greatly saving the investment cost;
2. after the laterite-nickel ore is smelted by using the blast furnace or the submerged arc furnace, the discharged cobalt-containing liquid alloy in the molten state saves energy and does not need to be melted and heated;
3. the invention simultaneously utilizes a plurality of metallurgical principles without generation of major pollutants, realizes nonequilibrium solidification, unbalanced crystallization, temperature control segregation and magnetic absorption enrichment, has no generation of major pollutants in the whole process, is environment-friendly and low-carbon, and develops a new process method for obtaining cobalt resources;
4. the invention effectively solves the problem that cobalt in the stainless steel smelted by the laterite-nickel ore smelting product exceeds the standard, optimizes the performance of downstream stainless steel production, solves the problem of pitting corrosion caused by the cobalt exceeding the standard in the stainless steel, and turns the harm into the treasure;
5. the method can be matched with the process technology of lithium extraction from the ternary battery anode material waste, bear the cobalt-containing solid waste metal after the lithium extraction process is completed, sequentially extract the most expensive lithium (the average lithium price of about 115 ten thousand/ton of metal lithium in 11 months in 2021) and cobalt (the average cobalt price of about 45 ten thousand/ton of metal cobalt in 11 months in 2021) in the ternary battery anode material, and directly sell the rest manganese and nickel as special steel material additives, so that the economy and the environmental protection are greatly enhanced.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for separating cobalt according to the present invention;
FIG. 2 is a process flow diagram for separating cobalt from a lateritic nickel ore production cobalt-containing alloy in accordance with the present invention;
FIG. 3 is a flow chart of the process for enriching and separating cobalt from the metal waste of cobalt-containing batteries according to the present invention;
FIG. 4 is a schematic diagram of electromagnetic stirring during segregation crystallization according to the present invention;
FIG. 5 is a diagram illustrating the components of the phase in the separation package after the segregation crystallization of the Fe-Co-Ni alloy is completed;
shown in the figure: a heat preservation bag cover 1; separating the packet 2; a vibrator 3; an electromagnetic stirrer 4; a bottom-wrapping heater 5; a ladle bottom water cooling device 6; an electromagnet 7; a fixed bracket 8; a lug 201; a bag body 202; a ladle body water cooling system 203; a body temperature control heater 204; a drain port 205.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
The invention provides a device for separating cobalt from cobalt-containing alloy by using a segregation crystallization method, which comprises a separation bag 2, wherein the top of the separation bag 2 is provided with a heat-preservation bag cover 1, the middle part of the separation bag 2 is provided with a vibrator 3, an electromagnetic stirrer 4 is arranged below the separation bag 2, the bottom of the separation bag 2 is provided with a bag bottom heater 5, the bottom of the separation bag 2 is placed on a bag bottom water cooling device 6, and an electromagnet 7 is arranged below the bag bottom water cooling device 6. A fixed bracket 8 is arranged outside the separation bag 2.
The separation bag 2 comprises a bag ear 201 and a bag body 202 arranged in the bag ear, a bag body water cooling system 203 is arranged in the bag body 202, and a bag body temperature control heater 204 is arranged outside the bag body 202. The bag body 202 is provided with a plurality of liquid discharge ports 205. The bag body 202 is composed of a steel outer shell and a refractory material built inside the steel outer shell.
The separation bag 2 is of an inverted cone structure, and the ratio of the lower surface area to the upper surface area of the cone is 1:5-100. If the cone is a cone, the ratio of the height H to the bottom diameter A is H: A =3-20; the above ratio is designed according to the cobalt content in the alloy which is often processed.
The invention utilizes that the Curie point (the temperature of spontaneous magnetization in the magnetic material which is reduced to zero, namely the temperature of loss of magnetism of the magnetic material) of cobalt is 1150 ℃, the Curie point temperature of the magnetic material iron which is often associated with cobalt is 786 ℃, and the Curie point temperature of nickel is 376 ℃. The common cobalt-containing alloy has the advantages that each metal and cobalt are mutually infinitely mutually soluble and are solid solutions, the cobalt is firstly enabled to be subjected to segregation crystallization in the alloy when the cobalt is required to be separated, and then the cobalt crystal nucleus which is gradually enlarged is magnetically attracted by utilizing the high Curie point of the cobalt crystal nucleus so as to be enriched and separated at the bottom of the separation bag in the crystallization and cooling processes. In order to achieve the purpose, the invention adopts the theory of non-equilibrium solidification and non-equilibrium crystallization to lead cobalt crystals to generate the intragranular segregation within controllable temperature. The specific technological process includes temperature control, crystal inducing agent addition, electromagnetic stirring, magnetic attraction and other steps. The further process method comprises the following steps: the method is characterized in that the method utilizes the principles of different Curie point temperatures and crystallization segregation of main elements in the cobalt-containing alloy, and the cobalt-containing alloy is put into a special separation device in a molten hot state to be subjected to vibration homogenization, standing, purification and deslagging; then the temperature of the ladle body is controlled so that the liquid cobalt-containing alloy is in the range of the freezing point plus 100 ℃; then adding a cobalt crystal inducing agent for gradually cooling, so that segregation crystal nuclei of cobalt are gradually generated in the liquid alloy, and the crystal nuclei collide with the bottom of a separation bag externally added with a magnetic field under the action of electromagnetic stirring; the separation package bottom is provided with quench water circulation system and strong magnetism electromagnetic adsorption device, and further accuse temperature makes the liquid alloy temperature in bottom 1150 ℃ of curie point temperature 1150 ℃ ± 50 ℃ within range of cobalt, further makes the crystal nucleus grow up, and big crystal nucleus receives separation device bottom magnetic force and adsorbs for cobalt crystal nucleus segregation is enriched in the separation device bottom, reaches the purpose with cobalt enrichment separation.
Example 1
Referring to fig. 1, 2, 4 and 5, the present embodiment provides a method for separating cobalt from a cobalt-containing alloy by using a segregation crystallization method, comprising the following steps:
1) A rotary kiln and an ore-smelting electric furnace RKEF process technology are adopted in a certain ferronickel factory to smelt high-nickel low-iron laterite-nickel ore, and the produced ferronickel product is refined by the following main components: 0.13 percent of cobalt-containing wt, 18 percent of nickel-containing wt, 76 percent of iron-containing wt, 2.6 percent of chromium-containing wt, 2.8 percent of carbon-containing wt and the balance of impurities; the temperature in a separation bag 2 of a device for separating cobalt after refining is about 1390 ℃, about 5 tons of alloy are put in once, and the crystallization temperature of the component alloy is about 1260 ℃ through calculation and actual measurement;
2) Firstly, using a vibrator 3 on a device for separating cobalt to homogenize alloy components and remove gas and floating impurities, then opening a ladle body water cooling system 203 to control the alloy temperature in a separation ladle 2 to be 1310-1360 ℃, and if the temperature is lower than the range in the process, using a ladle body temperature control heater 204 for matching control;
3) Opening the electromagnetic stirrer 4, uniformly adding about 1kg of 200-mesh nickel-cobalt alloy powder (Ni 70% Co 30%) serving as a crystal inducing agent into the separation bag 2, stirring all the time, further controlling the temperature of the bag body to 1250-1280 ℃ by using a bag body temperature control heater 204, and gradually segregating cobalt crystals;
4) Opening the ladle bottom water cooling device 6 to be matched with the ladle bottom heater 5, and controlling the temperature of the refractory material at the bottom of the separation ladle 2 to be 1100-1200 ℃;
5) Opening the electromagnet 7 at the bottom of the separation bag, adding 500-1000g of cobalt particles with the particle size of 10-30mm into the separation bag 2, and sinking part of unmelted cobalt particles into the bottom of the separation bag to be adsorbed at the bottom of the separation bag 2; according to the principle of similarity and compatibility, under the action of electromagnetic stirring, the segregated cobalt crystals collided to the bottom of the separation bag are gradually enriched and solidified to the bottom of the separation bag under the adsorption of electromagnetic and cobalt particles;
6) The aim of enriching and separating cobalt in the alloy is achieved through multiple enrichment operations, the upper layer alloy of the separation bag is discharged through an upper discharge port, and after the upper layer nickel-iron alloy is emptied, the upper layer nickel-iron alloy is sent to a stainless steel factory for use in a hot state; the cobalt-rich alloy at the bottom of the separation ladle is melted by heating of the ladle bottom heater 5 and is discharged through the lowest discharge port, thereby completing the separation of cobalt in the alloy.
Example 2
Referring to fig. 1, 2, 4 and 5, the present embodiment provides a method for separating cobalt from a cobalt-containing alloy by using a segregation crystallization method, comprising the following steps:
1) Some ferronickel factories adopt a blast furnace to smelt low-nickel high-iron high-cobalt laterite-nickel ore. The produced ferronickel product is refined by the following main components: 0.2 percent of cobalt-containing wt, 3.8 percent of nickel-containing wt, 90 percent of iron-containing wt, 1.6 percent of chromium-containing wt, 4.12 percent of carbon-containing wt and the balance of impurities; the temperature in a separation bag 2 of a device for separating cobalt after refining is about 1380 ℃, and about 5 tons of alloy is put into the separation bag at one time, and the crystallization temperature of the alloy of the component is about 1250 ℃ through calculation and actual measurement;
2) Using a vibrator 3 on a cobalt separation device to homogenize alloy components and remove gas and floating impurities, then opening a ladle body water cooling system 203 to control the alloy temperature in a separation ladle 2 to be 1300-1320 ℃, and if the temperature is lower than the range in the process, using a ladle body temperature control heater 204 to cooperate and control;
3) Opening the electromagnetic stirrer 4, uniformly adding about 500g of tungsten steel particles containing cobalt carbide with the particle size of 1-5mm and 500g of 100-mesh nickel powder into the separation bag 2 as a crystal inducing agent, stirring all the time, further controlling the temperature of the bag body to be 1230-1270 ℃, and gradually segregating cobalt crystals;
4) Opening the ladle bottom water cooling device 6 to be matched with the ladle bottom heater 5, and controlling the temperature of the refractory material at the bottom of the separation ladle 2 to be 1100-1180 ℃;
5) Opening the electromagnet 7 at the bottom of the separation bag, adding 300-500g of cobalt particles with the particle size of 10-30mm into the separation bag 2, and sinking part of unmelted cobalt particles into the bottom of the separation bag to be adsorbed at the bottom of the separation bag; according to the principle of similarity and compatibility, under the action of electromagnetic stirring, the segregated cobalt crystals collided to the bottom of the separation bag are gradually enriched and solidified to the bottom of the separation bag under the adsorption of electromagnetic and cobalt particles;
6) The aim of enriching and separating cobalt in the alloy is achieved through multiple enrichment operations, the upper layer alloy of the separation bag is discharged through an upper discharge port, and after the upper layer nickel-iron alloy is emptied, the upper layer nickel-iron alloy is sent to a stainless steel factory for use in a hot state; the cobalt-rich alloy at the bottom of the separation ladle is melted by heating of the ladle bottom heater 5 and is discharged through the lowest discharge port, thereby completing the separation of cobalt in the alloy.
Example 3
Referring to fig. 1, 3, 4 and 5, the present embodiment provides a method for separating cobalt from a cobalt-containing alloy by using a segregation crystallization method, comprising the following steps:
the positive electrode material of the cobalt-containing battery can gradually extract and separate the contained metal according to the content of the metal value in the positive electrode material of the battery.
1) For example, a certain battery dismantling plant disassembles cobalt-containing ternary positive electrode waste. The most valuable lithium is extracted through the raw material process (the average lithium price is about 115 ten thousand per ton of metallic lithium in 11 months in 2021), and the rest solid waste oxide containing cobalt is reduced and refined into alloy containing cobalt.
2) The cobalt-containing fine alloy provided after lithium extraction of the ternary battery positive electrode material is exemplified by the following components: 18 percent of cobalt, 18 percent of nickel, 55 percent of manganese, 5 percent of iron (mainly brought by a shell and a package), 2.3 percent of carbon (brought by a reduction process) and the balance of impurities, wherein the temperature in a separation bag 2 of a device for separating cobalt after refining is about room temperature cold state, and about 2 tons of alloy are put into the separation bag at one time, and the crystallization temperature of the component alloy is about 1220 ℃ after calculation and actual measurement;
3) After the feeding is finished, a ladle body temperature control heater 204 (medium frequency induction) on the cobalt separation device is started to heat and melt the alloy in the separation ladle 2, and when all the metal is melted, the temperature is raised to 1300-1350 ℃;
4) Next, using a vibrator 3 on the device for separating cobalt to homogenize alloy components and remove gas and floating impurities, then opening a ladle body water cooling system 203 to control the alloy temperature in the separation ladle 2 to be 1270-1300 ℃, and if the temperature is lower than the range in the process, using a ladle body temperature control heater 204 for matching control;
5) Opening the electromagnetic stirrer 4, uniformly adding about 500g of tungsten steel particles containing cobalt carbide with the particle size of 1-5mm and 200g of 100-mesh nickel powder into the separation bag 2 to serve as a crystal inducing agent, stirring all the time, further controlling the temperature of the bag body to 1200-1250 ℃, and gradually segregating cobalt crystals;
6) Opening the ladle bottom water cooling device 6 to be matched with the ladle bottom heater 5, and controlling the temperature of the refractory material at the bottom of the separation ladle 2 to be 1100-1150 ℃;
7) Opening the electromagnet 7 at the bottom of the separation bag, adding about 200g of permalloy particles with the particle size of 10-30mm into the separation bag 2, and allowing part of particles not to sink into the bottom of the separation bag and to be adsorbed at the bottom of the separation bag 2; according to the principle of similarity and intermiscibility, segregated cobalt crystals which collide the bottom of the separation bag 2 under the action of electromagnetic stirring are gradually enriched and solidified to the bottom of the separation bag under the adsorption of electromagnetism and cobalt particles;
8) Discharging the upper alloy of the separation bag through an upper discharge port, and using the upper alloy as a special steel raw material containing manganese and nickel or an outer pin after emptying the upper layer and removing cobalt alloy; the cobalt-rich alloy at the bottom of the separation ladle is melted by heating of the ladle bottom heater 5 and is discharged through the lowest discharge port, thereby completing the separation of cobalt in the alloy.
Through the method, the most expensive lithium (the average price of lithium at 11 months in 2021 is about 115 ten thousand per ton of metallic lithium) and cobalt (the average price of cobalt at 11 months in 2021 is about 45 ten thousand per ton of metallic cobalt) in the anode material of the ternary battery can be extracted by matching with the process technology of lithium extraction from the waste of the ternary battery, and the rest manganese and nickel are directly sold as additives of special steel materials, so that the economy and the environmental protection are greatly enhanced, and the method is a process technology worthy of popularization.
Claims (1)
1. The method for separating cobalt from cobalt-containing alloy by using a segregation crystallization method is characterized in that a device for separating cobalt is adopted, the device comprises a separation bag (2), a heat-preservation bag cover (1) is arranged at the top of the separation bag (2), a vibrator (3) is arranged in the middle of the separation bag (2), an electromagnetic stirrer (4) is arranged below the separation bag (2), a bag bottom heater (5) is arranged at the bottom of the separation bag (2), the bottom of the separation bag (2) is placed on a bag bottom water cooling device (6), an electromagnet (7) is arranged below the bag bottom water cooling device (6), the separation bag (2) comprises a bag lug (201) and a bag body (202) arranged in the bag lug, a bag body water cooling system (203) is arranged in the bag body (202), and a bag body temperature control heater (204) is arranged outside the bag body (202);
the method comprises the following steps:
1) putting the cobalt-containing alloy into a separation bag (2) of the cobalt separation device in a molten hot state by utilizing the principles of different Curie point temperatures and crystallization segregation of various elements in the cobalt-containing alloy, and performing vibration homogenization, standing purification and deslagging through a vibrator (3);
2) Opening a ladle body water cooling system (203) to control the alloy temperature in the separation ladle (2) to be 1300-1320 ℃;
3) Enabling the liquid cobalt-containing alloy to be in the range of the crystallization point temperature thereof plus 100 ℃ through a ladle body temperature control heater (204);
4) Opening the electromagnetic stirrer (4), uniformly adding a cobalt crystal inducer into the separation bag (2), and gradually cooling to gradually generate segregation crystal nuclei of cobalt in the liquid alloy, wherein the nuclei collide with the bottom of the separation bag externally added with a magnetic field under the action of the electromagnetic stirrer (4);
5) Opening a ladle bottom water cooling device (6), then matching with a ladle bottom heater (5), and further controlling the temperature at the bottom of the separation ladle (2) to ensure that the temperature of the liquid alloy at the bottom is in the range of 1150 +/-50 ℃ of the Curie point of cobalt, thereby further promoting the growth of crystal nuclei;
6) And (3) opening the electromagnet (7), adsorbing large crystal nuclei by the magnetic force of the electromagnet (7) at the bottom of the cobalt separation device, so that the cobalt crystal nuclei are adsorbed at the bottom of the cobalt separation device by the magnetic force, enriched and cooled and solidified, continuously stirring the nonmagnetic non-cobalt alloy at the temperature of the step (4) until the non-cobalt alloy is discharged from the upper part of the separation bag through an upper discharge port, melting the cobalt-rich alloy at the bottom of the separation bag under the heating of a bag bottom heater (5), and discharging the cobalt-rich alloy through a lowest discharge port to complete the separation of cobalt in the alloy.
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| GB569654A (en) * | 1940-09-21 | 1945-06-04 | Swift Levick And Sons Ltd | Improvements in or relating to the treatment of permanent magnet alloys |
| GB1452313A (en) * | 1972-11-14 | 1976-10-13 | Proler S | Method for enhancing the reduction of ores and oxides and the melting of metals using magnetic forces |
| GB1434214A (en) * | 1973-04-09 | 1976-05-05 | Tsnii Chernoj Metallurg | Method of procuing a metal part having at least one magnetic portion and at least one non-magnetic portion |
| GB1474368A (en) * | 1974-06-03 | 1977-05-25 | Sunderland Polytechnic | Method for the separation of rare earth metals lanthanum and yttrium |
| US5429583A (en) * | 1993-12-09 | 1995-07-04 | Pegasus Medical Technologies, Inc. | Cobalt palladium seeds for thermal treatment of tumors |
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