CN112143915B - Tin refining nickel removing process and device - Google Patents
Tin refining nickel removing process and device Download PDFInfo
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- CN112143915B CN112143915B CN202011042706.6A CN202011042706A CN112143915B CN 112143915 B CN112143915 B CN 112143915B CN 202011042706 A CN202011042706 A CN 202011042706A CN 112143915 B CN112143915 B CN 112143915B
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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
- C22B25/00—Obtaining tin
- C22B25/08—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
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
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Abstract
The invention relates to a tin refining nickel removal process and a tin refining nickel removal device, which belong to the technical field of metal smelting, effectively avoid the adoption of aluminum adding nickel removal operation, and do not produce high-risk waste residue aluminum slag; meanwhile, a set of tin refining nickel removing device is designed aiming at the new nickel removing process, so that the nickel removing rate is improved, and the production cost, the labor intensity and the safety risk of labor operation are reduced. The method not only realizes the high-efficiency removal of impurity nickel, but also avoids the production of aluminum slag, and the produced nickel slag can be directly subjected to wet electrolytic refining or be mixed into various metallurgical furnaces for smelting, thereby avoiding the vicious circle of nickel in the fire refining process.
Description
Technical Field
The invention belongs to the technical field of metal smelting, and particularly relates to a tin refining nickel removal process and device.
Background
Along with the complication of the structure of the raw materials for smelting tin, the depletion of tin ore resources, the enrichment of impurities such as nickel and the like is higher and higher, and no obvious open circuit exists in the pyrometallurgy of tin. The traditional method for removing nickel by refining tin by fire method usually adopts a method of adding aluminum and removing nickel, namely adding aluminum particles at high temperature to react with impurity nickel in tin liquid to generate nickel aluminum dross with low density and high melting point, and fishing out to achieve the purpose of removing impurities. The produced aluminum slag has high safety risk and can generate fatal arsine gas when meeting water. And the high-nickel crude tin produced after the aluminum slag is reduced and smelted by the ore-smelting electric furnace returns to the refining system to add aluminum again to remove nickel, so as to form a vicious circle of impurity nickel.
The prior nickel removal has the following defects:
the nickel element has inactive physical and chemical properties and is difficult to be removed from the tin product.
Secondly, the existing effective method for removing nickel by the tin fire method is only an aluminum-adding nickel-removing method, and the treatment technology is single. The produced aluminum slag has high safety management risk, and can only enter the ore-smelting electric furnace for reduction smelting when generating fatal arsine gas when meeting water, and the risk of unorganized emission such as 'material collapse' in the process of smelting the electric furnace is increased because water cannot be added for granulation.
The existing nickel removal method is characterized in that an operator adds a impurity removing agent by experience, so that the impurity removing effect is influenced and the residue amount is increased.
The currently added impurity removing agent is manually shoveled into the liquid surface of the metal, and then is stirred into the lower part of the liquid metal by a stirring machine, only 65-70% of the impurity removing agent reaches the middle-lower part of the liquid tin metal, most of the impurity removing agent floats on the surface of the liquid metal, so that the nickel removing is influenced, the impurity removing agent is wasted, and the quality technical index of the next procedure is increased. Increasing the production operating costs of the company.
The prior manual operation mode has high labor intensity, poor field operation environment, splashing of tin liquid in the operation process and certain potential safety hazard.
Disclosure of Invention
In order to overcome the problems in the background art, the invention provides a tin refining nickel removal process and a tin refining nickel removal device, which avoid the adoption of aluminum adding nickel removal operation and do not produce high-risk waste residue aluminum slag; meanwhile, a tin refining nickel removing device is designed aiming at the new nickel removing process, so that the nickel removing rate is improved, and the production cost, the labor intensity and the safety risk of labor operation are reduced. The method not only realizes the high-efficiency removal of impurity nickel, but also avoids the production of aluminum slag, and the produced nickel slag can be directly subjected to wet electrolytic refining or be mixed into various metallurgical furnaces for smelting, thereby avoiding the vicious circle of nickel in the fire refining process.
In order to realize the purpose, the invention is realized by the following technical scheme:
a tin refining nickel removal process comprises the following steps:
step 1) cooling, condensing and pre-removing nickel, adding a metal solution needing nickel removal into a refining pot for heating, then adding a mixed flocculant into crude tin for 3 times, and fully stirring, wherein the added mixed flocculant comprises sawdust: flour: rosin = 0-100%: 0-100%: 0-30%, stirring for 10min each time, and fishing out floating slag after stopping stirring;
step 2), removing nickel through vulcanization and strengthening, and mixing sulfur: adding a vulcanizing agent of sodium sulfite = 1-5: 1 into crude tin, and stirring for a period of time: fishing out floating slag after stopping stirring for 10-20 min;
step 3), deeply removing nickel by chlorination, adding ammonium chloride, and stirring strongly for: and (5) fishing out the floating slag after stopping stirring for 10-20 min.
Preferably, in step 1), the flocculant addition temperature is: the addition amount is 0.5-5 kg/ton of crude tin at 220-230 ℃.
Preferably, in step 2), the addition temperature of the vulcanizing agent is: adding the following components in percentage by weight: nickel content = 1: 1-3 of the additive.
Preferably, in the step 3), the temperature of adding the ammonium chloride is more than or equal to 300 ℃, and the adding amount is as follows: 2-4 kg/ton crude tin.
A tin refining nickel removing device comprises a hopper 1, a double-layer airlock valve 2, an impurity pump 3, an inert gas adding device 4, a feeding pipe 7, a melting box 8, a melting pump 9, a refining pot 10, a mobile platform 12, a material collecting box 13, a discharging pipe 14 and a discharging disc 15, wherein the mobile platform 12 is arranged above the refining pot 10, the melting pump 9 is fixedly arranged on the mobile platform 12, the impurity pump 3 is fixedly arranged on the mobile platform 12, a feeding hole of the impurity pump 3 is connected with an outlet of the material collecting box 13, a feeding hole of the material collecting box 13 is connected with a discharging hole of the double-layer airlock valve 2, a feeding hole of the double-layer airlock valve 2 is connected with a discharging hole of the hopper 1, and the material collecting box 13 is also connected with the inert gas adding device 4; the discharge gate of trash pump 3 is through being connected with 7 feed ends of filling tube, and a melting box 8 is installed to the discharge end of filling tube 7, and 8 bottoms of melting box set up a discharging pipe 14, and discharging pipe 14 is connected with play charging tray 15, and the gas outlet of melting pump 9 is connected with play charging tray 15.
Further, the tin refining nickel removing device can also adjust a fixed adjusting device 16 of the position of the mobile station 12.
Further, the fixed adjusting device 16 comprises a moving base 17, a moving column 18, a cantilever 19, a lead screw i 20, a motor i 21, a slide rail 22, a slide block 23, a lead screw ii 24, a through type linear lead screw motor 25, a motor ii 26 and a gear transmission mechanism 27, wherein the moving column 18 is mounted on the moving base 17 through a bearing, the cantilever 19 is mounted on the moving column 18 in a sleeved manner, a threaded hole parallel to the moving column 18 is formed in the cantilever 19, the motor i 21 is mounted at the top of the moving column 18, the output end of the motor i 21 is connected with the lead screw i 20, and the lead screw i 20 is in threaded connection with the threaded hole in the cantilever 19; the cantilever 19 is provided with a slide rail 22 and a lead screw II 24 which are parallel to each other, the slide rail 22 is provided with a slide block 23, the slide block 23 is provided with a screw hole in threaded connection with the lead screw II 24, the slide block 23 is provided with a through type linear lead screw motor 25 connected with the lead screw II 24, the slide block 23 is provided with a mobile platform 13, a motor II 26 is arranged in the mobile base 17, and a power output shaft of the motor II 26 is connected with the lower end of the mobile column 18 through a gear transmission mechanism 27.
Further, the motor I21, the through type linear screw motor 25 and the motor II 26 are respectively connected with the control module 28 through relays; the double-layer airlock valve 2, the impurity pump 3 and the melting pump 9 are respectively connected with a control module 28.
The invention has the beneficial effects that:
the invention effectively avoids the aluminum adding and nickel removing operation and does not produce high-risk waste residue aluminum slag; meanwhile, a tin refining nickel removing device is designed aiming at the new nickel removing process, so that the nickel removing rate is improved, and the production cost, the labor intensity and the safety risk of labor operation are reduced. The method not only realizes the high-efficiency removal of impurity nickel, but also avoids the production of aluminum slag, and the produced nickel slag can be directly subjected to wet electrolytic refining or be mixed into various metallurgical furnaces for smelting, thereby avoiding the vicious circle of nickel in the fire refining process.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the fixing and adjusting device of the present invention;
fig. 3 is a wiring diagram of a control circuit of the present invention.
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 the accompanying drawings, 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 tin refining nickel removal process comprises the following steps:
step 1) cooling, condensing and pre-removing nickel, adding a metal solution needing nickel removal into a refining pot for heating, then adding a mixed flocculant into crude tin for 3 times, and fully stirring, wherein the added mixed flocculant comprises sawdust: flour: rosin = 0-100%: 0-100%: 0-30%, stirring for 10min each time, and fishing out floating slag after stopping stirring. During the precipitation process, Ni is added to the crude tin above the melting point of tin 3 Sn 2 、Ni 3 Sn 4 The solid solution is crystallized and precipitated, the cohesiveness of the solid solution is small, fine particles are suspended in the tin liquid, and the solid solution is promoted to be separated from the tin liquid by the pushing of an external force. Then adding mixed flocculant to make Ni 3 Sn 2 、Ni 3 Sn 4 And the crystals are stuck on the mixed flocculating agent and are brought to the surface of the molten tin to form scum for removal. The mixed flocculant in the present application comprises: wood chip sawing: flour: rosin; formation of carbon residue pair Ni in high-temperature tin liquor by using sawdust 3 Sn 2 、Ni 3 Sn 4 The crystal has better adsorption capacity, the flour can also form carbon residue in high-temperature tin liquid, the compactness is higher, the adsorption capacity is stronger, tin-nickel solid solution wrapped in the tin liquid can be separated from the tin liquid, the rosin can loosen nickel residue particles, the tin liquid mechanically carried in the nickel residue is reduced, and the tin content of the residue can be effectively reduced. Tests prove that the wood dust: flour: rosin =0 ~ 100Percent: 0-100%: 0 to 30% of Ni 3 Sn 2 、Ni 3 Sn 4 The adsorption capacity of the crystals is stronger, the particles of the formed nickel slag are loose, the tin content of the slag is lower, but the rosin has higher grease content and overhigh proportion, which can cause overlarge smoke gas in the stirring process and damage to a cloth bag dust collection and a fan of a dust collection system. Adding flocculant to remove nickel three times, properly reducing operation temperature and increasing Ni in the processes of adding additive, stirring and dragging slag 3 Sn 2 、Ni 3 Sn 4 When crystals are separated out, the processes of stirring and slag dragging for many times can ensure that Ni is precipitated 3 Sn 2 、Ni 3 Sn 4 When the crystal condensate is fully contacted with the additive, the removal efficiency is accelerated. Temperature of flocculant addition: the addition amount is 0.5-5 kg/ton of crude tin at 220-230 ℃; at the temperature of 220 ℃ and 230 ℃, the tin-nickel solid solution is fully crystallized and separated out near the melting point of tin, and the addition amount is 0.5-5 kg/ton of crude tin, so that the maximum removal of nickel can be ensured.
Step 2), removing nickel through vulcanization and strengthening, and mixing sulfur: adding a vulcanizing agent of sodium sulfite = 1-5: 1 into crude tin, and stirring for a period of time: and (5) fishing out the floating slag after stopping stirring for 10-20 min. Temperature of the vulcanizing agent: adding the following components in percentage by weight: nickel content = 1: 1-3 of the additive. The simple substance nickel reacts with sulfur to generate nickel sulfide (NiS) and low-sulfur nickel (Ni) 3 S 2 ) The nickel sulfide is unstable and easy to dissociate into low-nickel sulfide at high temperature, and the nickel sulfide has high melting point (797 ℃) and low density (5.8 g/ml) and is separated from tin liquid, so that the enhanced nickel sulfide removal can be realized. The mixed flocculant removes nickel from 0.2% to below 0.05%, and then removes nickel from 0.05% to below 0.01% by removing nickel through vulcanization. Meanwhile, sodium sulfite has strong reducibility and can be deeply wrapped with Ni in tin liquid 3 Sn 2 、Ni 3 Sn 4 Performing solid solution reaction to replace partial nickel and promote the reaction of nickel and sulfur; meanwhile, sulfur and nickel can fully react at 250-400 ℃ to generate low-nickel sulfide.
Step 3), deeply removing nickel by chlorination, adding ammonium chloride, and stirring strongly for: and (5) fishing out the floating slag after stopping stirring for 10-20 min. The temperature of adding ammonium chloride is more than or equal to 300 ℃, and the adding amount is as follows: 2 to 4 kg/ml-Ton of crude tin. Nickel and ammonium chloride are reacted to produce nickel chloride (NiCl) 2 ) The deep removal of nickel is realized, and when the temperature is more than or equal to 300 ℃, the nickel and ammonium chloride can have violent chlorination reaction to generate nickel chloride, and the reaction formula is as follows: 2Ni +4NH 4 Cl+O 2 =2NiCl 2 +2H 2 O+4NH 3； The nickel can be removed from 0.01 percent to below 0.005 percent through deep nickel removal by chlorination, and the product quality standard is met.
As shown in figures 1-2, a tin refining nickel removing device comprises a hopper 1, a double-layer airlock valve 2, an impurity pump 3, an inert gas adding device 4, a feeding pipe 7, a melting tank 8, a melting pump 9, a refining pot 10, a mobile station 12, a material collecting box 13, a material discharging pipe 14 and a material discharging disc 15, a smoke hood 11 is arranged at the top of the refining pot 10, a strip-shaped opening is arranged on the smoke hood 11, one end of a mobile station 12 extends into the smoke hood 11 from the strip-shaped opening on the smoke hood 11, a melting pump 9 is fixedly arranged on the mobile station 12, the melting pump 9 is positioned in the smoke hood 11, the impurity pump 3 is fixedly arranged on the mobile station 12, the feed inlet of the impurity pump 3 is connected with the outlet of the material collecting box 13, the feed inlet of the material collecting box 13 is connected with the discharge outlet of the double-layer air locking valve 2, the feed inlet of the double-layer air locking valve 2 is connected with the discharge outlet of the hopper 1, and the material collecting box 13 is also connected with the inert gas adding device 4; the discharge gate and the filling tube 7 feed end of trash pump 3 are connected, set up solenoid valve 5 and check valve 6 between trash pump 3 and the filling tube 7, and a melting box 8 is installed to the discharge end of filling tube 7, and 8 bottoms in melting box set up a discharging pipe 14, and discharging pipe 14 is connected with play charging tray 15, and the gas outlet and the play charging tray 15 of melting pump 9 are connected. Adding a metal solution to be subjected to nickel removal into a refining pot 10, heating, wherein the liquid level of the metal solution is higher than the upper surface of a discharge disc 15, placing a certain amount of mixed flocculant into a hopper 1, then opening an impurity pump 3, opening a double-layer air locking valve 2, an electromagnetic valve 5 and a check valve 6, enabling the mixed flocculant to enter a material collecting box 13 through the double-layer air locking valve 2, meanwhile, introducing inert gas into the material collecting box 13 through an inert gas adding device 4, fluidizing the mixed flocculant entering the material collecting box 13 by wind under the action of the impurity pump 3 and the inert gas, sending the mixed flocculant into a feed pipe 7 and further entering a melting box 8, melting the mixed flocculant in the melting box 8 by utilizing the temperature of the metal solution, then starting a melting pump 9, adding the mixed flocculant melted in the melting box 8 into the metal solution through the discharge disc 15, wherein the flocculant pumped by the melting pump 9 has impulsive force, so can make the flocculating agent can be quick with metal solution intensive mixing, stop after mixing to refine pot 10 heating, make the metal solution after reacting with the flocculating agent cooling flocculation formation take the dross of nickel, then drag for the dross to remove. And then, the steps are repeated for 3 times to realize the addition of the flocculating agent and enhance the removal of the nickel. Then adding a certain amount of vulcanizing agent into the hopper 1, repeating the feeding process, adding the vulcanizing agent into the metal solution in the refining pot 10, removing nickel through the vulcanizing agent by means of strengthening, and fishing out the scum with nickel. Finally, adding a certain amount of ammonium chloride into the hopper 1, repeating the feeding process, adding the ammonium chloride into the metal solution in the refining pot 10, deeply removing nickel through the ammonium chloride, and removing the scum with nickel to finish the removal of nickel impurities; in the nickel removing process, the addition of a flocculating agent, a vulcanizing agent and an impurity removing agent of ammonium chloride is realized by adopting inert gas, so that the oxidation of tin is effectively avoided in the impurity removing process; meanwhile, after the inert gas enters the metal solution in the refining kettle 10 under the action of the melting pump 9, the turnover of the metal solution can be improved, various impurity removing agents can be fully mixed with the metal solution, the impurity removing time is shortened, and the impurity removing efficiency and effect are improved. By providing the check valve 6 during the nickel removal process, the check valve 6 prevents the backflow of the liquid tin produced during shutdown.
The tin refining nickel removing device can also adjust a fixed adjusting device 16 of the position of the mobile station 12. The fixed adjusting device 16 comprises a movable base 17, a movable column 18, a cantilever 19, a lead screw I20, a motor I21, a slide rail 22, a slide block 23, a lead screw II 24, a through type linear lead screw motor 25, a motor II 26 and a gear transmission mechanism 27, wherein the movable column 18 is arranged on the movable base 17 through a bearing, the cantilever 19 is arranged on the movable column 18 in a sleeved mode, a threaded hole parallel to the movable column 18 is formed in the cantilever 19, the motor I21 is arranged at the top of the movable column 18, the output end of the motor I21 is connected with the lead screw I20, and the lead screw I20 is in threaded connection with the threaded hole in the cantilever 19; the cantilever 19 is provided with a slide rail 22 and a lead screw II 24 which are parallel to each other, the slide rail 22 is provided with a slide block 23, the slide block 23 is provided with a screw hole in threaded connection with the lead screw II 24, the slide block 23 is provided with a through type linear lead screw motor 25 connected with the lead screw II 24, the slide block 23 is provided with a mobile platform 13, a motor II 26 is arranged in the mobile base 17, and a power output shaft of the motor II 26 is connected with the lower end of the mobile column 18 through a gear transmission mechanism 27. The whole fixed adjusting device 16 can be driven to move by moving the base 17, so that the position of the fixed adjusting device is adjusted, the position between the whole fixed adjusting device 16 and the refining pot 10 is suitable, and the sliding rail 22 can be ensured to extend into the refining pot 10 from the opening on the smoke hood 11. The motor II 26 can drive the moving column 18 to rotate through the gear transmission mechanism 27, so as to drive the cantilever 19 to rotate along with the moving column 18, and further the front and back positions of the melting pump 9, the discharging disc 15 and the melting box 8 are further arranged. And at this moment, the through type linear screw motor 25 can drive the screw II 24 to rotate, the sliding block 23 arranged on the screw II 24 moves along the length directions of the screw II 24 and the sliding rail 22, so that the sliding block 23 drives the melting pump 9, the discharging disc 15 and the melting box 8 to move along the length direction of the sliding rail 22, and the sliding rail 22 can move left and right above the metal solution in the refining pot 10. The motor I21 drives the screw rod I20 to rotate, the rotation of the screw rod I20 drives the cantilever 19 to move up and down along the screw rod I20 and the moving column 18, so that the height positions of the melting pump 9, the discharging disc 15 and the melting box 8 are adjusted according to the height of the metal solution in the refining pot 10, the discharging disc 15 and the melting box 8 can effectively extend into the middle lower part of the metal solution, the impurity removing agent sprayed out from the discharging disc 15 can be added into the metal solution finally, and the impurity removing agent is prevented from floating on the surface of the metal solution after being added into the refining pot 10; so as to improve the melting efficiency of the impurity removing agent and reduce the probability of oxidation reaction caused by the contact of the impurity removing agent and air. Meanwhile, the impurity removing agent is fed into the refining pot 10 by adopting inert gas, so that after the inert gas enters the refining pot 10, the impurity removing agent can be dispersed into the metal solution in the refining pot 10 in a wind pressure mode, the effect of stirring the impurity removing agent and the metal solution is achieved, and the impurity removing agent and the metal solution are fully mixed; and moreover, the inert gas conveys the impurity removing agent, so that the oxidation of tin is solved, the turnover of the metal solution is improved, the full mixing reaction of the impurity removing agent and the metal solution is realized, and the impurity removing time is shortened. Like this, can adjust the reinforced position of ejection of compact dish 15 and melting box 8 through fixed adjusting device 16, guarantee that the miscellaneous agent of taking off can add the different positions in refining pot 10, again under inert gas's impact for can both be even add in the metal solution in refining pot 10 and take off miscellaneous agent, improve the miscellaneous efficiency and the effect of taking off of crude tin, reduce the production of residue and reduce the residue treatment cost. Because the discharging disc 15 and the melting box 8 can extend into the middle lower part of the liquid level of the refining pot 10, when two or more impurity removing agents are added, the metal solution can not be splashed, and safety accidents caused by splashing of the metal solution are avoided.
As shown in fig. 3, the motor i 21, the through type linear screw motor 25 and the motor ii 26 are respectively connected with the control module 28 through relays; the double-layer airlock valve 2, the impurity pump 3, the electromagnetic valve 5 and the melting pump 9 are respectively connected with a control module 28. Through setting up control module 28, when the position that reciprocates is gone out to the material dish 15 and is melted case 8 in needs adjustment, can control motor I21 fast through control module 28, make motor I21 drive the operation of lead screw I20, make cantilever 19 reciprocate under the drive of lead screw I20. When the front and back movement positions of the discharging disc 15 and the melting box 8 need to be adjusted, the control module 28 rapidly controls the motor II 26 to work, so that the motor II 26 drives the moving column 18 to rotate, and the front and back movement of the discharging disc 15 and the melting box 8 is realized. When the left and right positions of the discharging disc 15 and the melting box 8 need to be adjusted, the control module 28 rapidly controls the through linear screw motor 25 to work, and drives the screw II 24 to rotate to drive the sliding block 23 to move left and right along the sliding block, so that the discharging disc 15 and the melting box 8 can move left and right. Thus, the motor I21, the through type linear screw motor 25 and the motor II 26 are automatically controlled to automatically work through the control module 28, so that the discharging disc 15 and the melting box 8 can extend into the middle lower part of the metal solution of the refining pot 10 and can move in the metal solution; ensuring that the impurity removing agent can be added to different positions in the refining kettle 10, and then enabling the impurity removing agent to be uniformly added into the tin solution in the refining kettle 10 under the impact action of inert gas, improving the impurity removing efficiency and effect, reducing the generation of residues and reducing the treatment cost of the residues.
Through a new nickel removing process and impurity removing agent adding equipment, the fed materials are more accurate, the impurity removing time of each batch of crude metal is shortened from the original 8 hours to the current 5.5 hours, and the slag amount is reduced by 50-100 kg per batch of crude tin; the impurity removal rate is improved from the original 90.5 percent to the current 99.2 percent. The qualification rate of the product after one-time nickel removal reaches 98.5 percent, and the operation cost is saved by 480 ten thousand yuan.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (8)
1. A tin refining nickel-removing process is characterized in that: the method comprises the following steps:
step 1) cooling, condensing and pre-removing nickel, adding a metal solution needing nickel removal into a refining pot for heating, then adding a mixed flocculant into crude tin for 3 times, and fully stirring, wherein the added mixed flocculant comprises sawdust: flour: rosin = (0-100%): (0-100%): (0-30%), stirring for 10min each time, and fishing out floating slag after stopping stirring;
step 2), removing nickel through vulcanization and strengthening, and mixing sulfur: adding a vulcanizing agent of sodium sulfite = (1-5) 1 into crude tin, stirring for a period of time: fishing out floating slag after stopping stirring for 10-20 min;
step 3), deeply removing nickel by chlorination, adding ammonium chloride, and stirring strongly for: and (5) fishing out the floating slag after stopping stirring for 10-20 min.
2. The tin refining nickel removal process of claim 1, wherein: in the step 1), adding a flocculating agent at a temperature: the addition amount is 0.5-5 kg/ton of crude tin at 220-230 ℃.
3. The tin refining nickel removal process of claim 1, wherein: in the step 2), adding a vulcanizing agent at a temperature: adding the following components in percentage by weight: nickel content = 1: 1-3 of the additive.
4. The tin refining nickel removal process of claim 1, wherein: in the step 3), the temperature of adding ammonium chloride is more than or equal to 300 ℃, and the adding amount is as follows: 2-4 kg/ton crude tin.
5. The process of any one of claims 1 to 4, wherein: smelting by adopting a tin refining nickel removal device; the tin refining nickel removing device comprises a hopper (1), a double-layer airlock valve (2), an impurity pump (3), an inert gas adding device (4), a feeding pipe (7), a melting box (8), a melting pump (9), a refining pot (10), a mobile platform (12), a material collecting box (13), a discharging pipe (14) and a discharging disc (15), a movable platform (12) is arranged above the refining pot (10), a melting pump (9) is fixedly arranged on the movable platform (12), an impurity pump (3) is fixedly arranged on the movable platform (12), a feed inlet of the impurity pump (3) is connected with an outlet of a material collecting box (13), a feed inlet of the material collecting box (13) is connected with a discharge outlet of a double-layer air locking valve (2), a feed inlet of the double-layer air locking valve (2) is connected with a discharge outlet of a hopper (1), and the material collecting box (13) is also connected with an inert gas adding device (4); the discharge port of the impurity pump (3) is connected with the feed end of the feed pipe (7), the discharge end of the feed pipe (7) is provided with a melting box (8), the bottom of the melting box (8) is provided with a discharge pipe (14), the discharge pipe (14) is connected with a discharge disc (15), and the gas outlet of the melting pump (9) is connected with the discharge disc (15).
6. The tin refining nickel removal process of claim 5, wherein: the tin refining nickel removing device also can adjust a fixed adjusting device (16) of the position of the mobile station (12).
7. The tin refining nickel removal process of claim 6, wherein: the fixed adjusting device (16) comprises a movable base (17), a movable column (18), a cantilever (19), a lead screw I (20), a motor I (21), a sliding rail (22), a sliding block (23), a lead screw II (24), a through type linear lead screw motor (25), a motor II (26) and a gear transmission mechanism (27), wherein the movable column (18) is installed on the movable base (17) through a bearing, the cantilever (19) is installed on the movable column (18) in a sleeved mode, a threaded hole parallel to the movable column (18) is formed in the cantilever (19), the motor I (21) is installed at the top of the movable column (18), the output end of the motor I (21) is connected with the lead screw I (20), and the lead screw I (20) is in threaded connection with the threaded hole in the cantilever (19); install slide rail (22) and II (24) of lead screw that are parallel to each other on cantilever (19), install sliding block (23) on slide rail (22), and set up the screw with II (24) threaded connection of lead screw on sliding block (23), install the through type linear screw motor (25) of being connected with II (24) of lead screw on sliding block (23), install moving platform (12) on sliding block (23), install motor II (26) in moving base (17), the power output shaft of motor II (26) passes through gear drive (27) and is connected with the lower extreme that removes post (18).
8. The tin refining nickel removal process of claim 7, wherein: the motor I (21), the penetrating type linear screw motor (25) and the motor II (26) are respectively connected with the control module (28) through relays; the double-layer airlock valve (2), the impurity pump (3) and the melting pump (9) are respectively connected with the control module (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011042706.6A CN112143915B (en) | 2020-09-28 | 2020-09-28 | Tin refining nickel removing process and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011042706.6A CN112143915B (en) | 2020-09-28 | 2020-09-28 | Tin refining nickel removing process and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112143915A CN112143915A (en) | 2020-12-29 |
| CN112143915B true CN112143915B (en) | 2022-08-02 |
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