CN112195311A - Process for producing steelmaking deoxidization fluxing slag refining complexing agent by using waste electrolyte - Google Patents
Process for producing steelmaking deoxidization fluxing slag refining complexing agent by using waste electrolyte Download PDFInfo
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- CN112195311A CN112195311A CN202011014695.0A CN202011014695A CN112195311A CN 112195311 A CN112195311 A CN 112195311A CN 202011014695 A CN202011014695 A CN 202011014695A CN 112195311 A CN112195311 A CN 112195311A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/076—Use of slags or fluxes as treating agents
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
- C21C7/0645—Agents used for dephosphorising or desulfurising
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides a process for producing a steelmaking deoxidization fluxing slag refining complexing agent by using waste electrolyte, and relates to the technical field of complexing agents. The process for producing the steelmaking deoxidization fluxing slag refining complexing agent by using the waste electrolyte comprises the following steps: s1, sorting and preparing waste electrolyte: collecting solid waste electrolyte generated after certain mass of electrolytic aluminum, adding equal mass of additives for later use, and S2, primarily crushing: the solid mixture prepared in S1 was injected into a jaw crusher and crushed for further use. When the process for producing the steelmaking deoxidization fluxing slag refining complexing agent by using the waste electrolyte is used, 0.5-2kg of finished product is added into each ton of molten steel according to the actual use condition, so that sodium, fluorine, aluminum, calcium fluoride and aluminum oxide in the finished product can effectively prepare sodium hexafluoroaluminate and aluminum fluoride, the melting point of aluminum during aluminum electrolysis can be effectively reduced, and the conductivity of the electrolyte can be effectively improved.
Description
Technical Field
The invention relates to the technical field of complexing agents, in particular to a process for producing a steelmaking deoxidization fluxing slag refining complexing agent by using waste electrolytes.
Background
The electrolytic aluminum is aluminum obtained by electrolysis, the modern electrolytic aluminum industrial production adopts a cryolite-alumina molten salt electrolysis method, the molten cryolite is a solvent, the alumina is a solute, a carbon body is used as an anode, aluminum liquid is used as a cathode, and after strong direct current is introduced, electrochemical reaction is carried out on two poles in an electrolytic cell at 950 ℃ -970 ℃.
Disclosure of Invention
The invention aims to provide a process for producing a steelmaking deoxidization fluxing slag refining complexing agent by using waste electrolytes, which can effectively reduce or replace the input of auxiliary materials, further effectively reduce the input of actual production cost, improve the actual economic benefit, effectively collect and treat harmful substances, reduce the emission of the harmful substances and improve the actual production effect.
In order to achieve the purpose, the invention is realized by the following technical scheme: a process for producing a steelmaking deoxidization fluxing slag refining complexing agent by using waste electrolytes comprises the following steps: s1, sorting and preparing waste electrolyte: collecting solid waste electrolyte generated after certain mass of electrolytic aluminum, and adding additives with equal mass for later use.
S2, primary crushing: the solid mixture prepared in S1 was injected into a jaw crusher and crushed for further use.
S3, particle screening: and (4) filtering and screening the solid mixture crushed in the step (S2) by a screening machine to screen solid mixture particles with the particle size of 5-50mm for later use.
S4, complete crushing: and (4) crushing the solid mixture with the excessive particle size screened in the step (S3) again through a jaw crusher, screening the grains after crushing again, and repeating the steps (S2-S3) until the particle sizes of all the solid grains of the mixture are 5-50 mm.
S5, mixing and pressing balls: and (3) injecting the 5-50mm solid particles prepared in the S3 and the S4 into a ball mill for grinding and crushing, injecting the ground mixture powder into a mixing container containing a binder, uniformly stirring and mixing the mixture by a stirrer, and injecting the uniformly mixed mixture into a high-pressure ball press for shaping.
S6, drying and refining: and (5) putting the sphere mixture prepared in the step (S5) into drying equipment for drying treatment to obtain a finished product.
As a further scheme of the invention: according to the operation step in S1, the additive comprises alumina, calcium fluoride, sodium, fluorine and aluminum, wherein the alumina content accounts for 3-8% of the total mass of the additive, the calcium fluoride content accounts for 4-8% of the total mass of the additive, the sodium content accounts for 20-28% of the total mass of the additive, the fluorine content accounts for 45-52% of the total mass of the additive, and the aluminum content accounts for 14-25% of the total mass of the additive.
As a further scheme of the invention: according to the operation step in S2, the jaw crusher has a maximum feed particle size of 1020mm and a feed inlet size of 1200X 1500 mm.
As a further scheme of the invention: according to the operation in S5, the sieving filtration treatment of the mixture powder is performed before the mixture powder is mixed with the binder.
As a further scheme of the invention: the screen mesh of the screening machine is 100-200 meshes, the wire diameter of the screen mesh of the screening machine is 0.05-0.09mm, and the aperture of the screen mesh of the screening machine is 0.15-0.075 mm.
As a further scheme of the invention: according to the operation step in S5, the diameter of the grinding ball of the ball mill is 3-12mm, and the rotating speed of the ball mill is 50 r/min.
As a further scheme of the invention: according to the operation step in S5, the rotation speed of the stirrer is 300-410r/min, and the running time of the stirrer is 15-20 min.
As a further scheme of the invention: according to the operation step in S5, the diameter of the mixture sphere produced by the high-pressure sphere press is 5-50mm, and the rotating speed of the main shaft of the high-pressure sphere press is 11 r/min.
The invention provides a process for producing a steelmaking deoxidization fluxing slag refining complexing agent by using waste electrolyte. The method has the following beneficial effects:
the process for producing the steelmaking deoxidization fluxing slag refining complexing agent by using the waste electrolyte comprises the steps of adding 0.5-2kg of finished product into each ton of molten steel according to the actual using condition when in use, so that sodium, fluorine, aluminum, calcium fluoride and aluminum oxide in the finished product can effectively prepare sodium hexafluoroaluminate and aluminum fluoride, further the melting point of aluminum during aluminum electrolysis can be effectively reduced, the conductivity of the electrolyte can be effectively improved, the slagging speed of wastes is accelerated, the slag fluidity at low temperature is better, desulfurization and dephosphorization can be carried out more quickly, the molten steel is purer, further the use of the finished product and auxiliary materials is effectively reduced, the effect of reducing the production cost is achieved, and simultaneously, the process is influenced by the high temperature in the steelmaking slagging process, so that more mineral compound steel slags can be produced in the actual production process and can be used as cement production raw materials and can generate hydration reaction in actual use, further, fluorine and fluoride can be effectively sealed in the cementing material for producing cement, so that the emission of harmful substances is effectively reduced, the harmless conversion of the fluoride is realized, and simultaneously, the used resources can be fully used.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The invention is illustrated below with reference to specific examples. It will be understood by those skilled in the art that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention in any way.
Embodiment 1, a process for producing steelmaking deoxidization fluxing slag refining complexing agent by waste electrolyte, comprising the following steps: the method comprises the following steps of sorting and preparing the waste electrolyte: collecting solid waste electrolyte generated after electrolytic aluminum with a certain mass, adding additives with equal mass for later use, wherein the additives comprise aluminum oxide, calcium fluoride, sodium, fluorine and aluminum, the aluminum oxide content accounts for 3-8% of the total mass of the additives, the calcium fluoride content accounts for 4-8% of the total mass of the additives, the sodium content accounts for 20-28% of the total mass of the additives, the fluorine content accounts for 45-52% of the total mass of the additives, and the aluminum content accounts for 14-25% of the total mass of the additives, the additives can effectively generate sodium hexafluoroaluminate and aluminum fluoride, so that the melting point of aluminum during electrolytic aluminum can be effectively reduced, the conductivity of the electrolyte can be effectively improved, the speed of waste slag is increased, the slag fluidity at low temperature is better, the desulfurization and desulfurization treatment are effectively accelerated, and the second step is a primary crushing step: injecting the solid mixture prepared in the step one into a jaw crusher for crushing for later use, wherein the maximum feeding granularity of the jaw crusher is 1020mm, and the size of a feeding hole is 1200 multiplied by 1500mm, so that the crushing efficiency can be effectively improved through the selection of the structure, the crushing treatment of the waste electrolyte solid block is accelerated, and the step three is a particle screening step: filtering and screening the solid mixture subjected to the crushing treatment in the step two through a screening machine, screening solid mixture particles with the particle size of 5-50mm for later use, further facilitating the grinding treatment of the mixture particles, and completely crushing the mixture particles in the step four: carrying out crushing treatment on the solid mixture with the oversize particle size screened in the step three again through a jaw crusher, screening the particles after secondary crushing, repeating the step two and the step three until the particle sizes of all the solid particles of the mixture are 5-50mm, ensuring that the grinding work can be efficiently carried out, and mixing and pressing the particles: injecting the 5-50mm solid particles prepared in the third step and the fourth step into a ball mill for grinding and crushing treatment to enable the solid particles to be more fully fused with the adhesive, injecting the ground mixture powder into a mixing container containing the adhesive, uniformly stirring and mixing the mixture powder through a stirrer, further effectively performing the shaping operation of the mixture, injecting the uniformly mixed mixture into a high-pressure ball press for shaping treatment, and conveniently storing and using the final product, performing screening and filtering treatment on the mixture powder before mixing the mixture powder and the adhesive, wherein the screen mesh of the screening machine is 100-mesh and 200-mesh, the wire diameter of the screen mesh of the screening machine is 0.05-0.09mm, the screen mesh diameter of the screening machine is 0.15-0.075mm, further effectively enabling the finished product to be more easily used in the actual use process, and the diameter of the grinding ball of the ball mill is 3-12mm, the rotating speed of the ball mill is 50r/min, the rotating speed of the stirring machine is 300-410r/min, the running time of the stirring machine is 15-20min, so that solid particles of the mixture can be fully ground, the diameter of a sphere of the mixture produced by the high-pressure ball press machine is 5-50mm, the rotating speed of a main shaft of the high-pressure ball press machine is 11r/min, so that a finished product can be conveniently stored and used, the actual using effect of the finished product is improved, and the step six is drying and refining: and (5) placing the sphere mixture prepared in the step five into drying equipment for drying treatment to prepare a finished product, so that the finished product is convenient to store for a long time, and the actual use effect of the finished product is improved.
When in use, 0.5-2kg of finished product is added into each ton of molten steel according to actual use conditions, so that sodium, fluorine, aluminum, calcium fluoride and aluminum oxide in the finished product can effectively prepare sodium hexafluoroaluminate and aluminum fluoride, further the melting point of aluminum in aluminum electrolysis can be effectively reduced, the conductivity of electrolyte can be effectively improved, the slagging speed of waste is accelerated, the fluidity of slag at low temperature is better, desulfurization and dephosphorization can be carried out more quickly, the molten steel is purer, the use of the finished product and auxiliary materials is effectively reduced, the effect of reducing production cost is achieved, and simultaneously, the mineral compound steel slag is influenced by high temperature in the steelmaking and slagging process, so that more mineral compound steel slag can be generated in the actual production process, can be used as cement production raw materials, can generate hydration reaction in actual use, and further can effectively seal fluorine and fluoride in a cementing material for producing cement, further effectively reducing the emission of harmful substances, realizing the harmless conversion of fluoride and simultaneously fully using the used resources.
The chemical reaction formula generated in the practical use process of the invention is as follows:
Na3AlF6+ AlF3+CaO+Al+CaF2+C+Al2O3→2CaOSiO2+Na2O+NaF∙SiO2+SiF4∙HF+4CaO2Ai2O3+CaO∙SiO2∙CaF2+2CO+Fe。
further, the low-melting-point compound and the gas phase are generated in the actual production process, so that the use of actual finished products and auxiliary materials is effectively reduced, and the aim of reducing the production cost is fulfilled.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (8)
1. A process for producing a steelmaking deoxidization fluxing slag refining complexing agent by using waste electrolytes is characterized by comprising the following steps:
s1, sorting and preparing waste electrolyte: collecting solid waste electrolyte generated after a certain mass of electrolytic aluminum, and adding additives with equal mass for later use;
s2, primary crushing: injecting the solid mixture prepared in the S1 into a jaw crusher for crushing for later use;
s3, particle screening: filtering and screening the solid mixture crushed in the step S2 by a screening machine to screen solid mixture particles with the particle size of 5-50mm for later use;
s4, complete crushing: crushing the solid mixture with the oversize particle size screened in the S3 again through a jaw crusher, screening the crushed particles again, and repeating the steps of S2-S3 until the particle sizes of all the solid particles of the mixture are 5-50 mm;
s5, mixing and pressing balls: injecting the 5-50mm solid particles prepared in S3 and S4 into a ball mill for grinding and crushing, injecting the ground mixture powder into a mixing container containing a bonding agent, stirring and mixing uniformly by a stirrer, and injecting the uniformly mixed mixture into a high-pressure ball press for shaping;
s6, drying and refining: and (5) putting the sphere mixture prepared in the step (S5) into drying equipment for drying treatment to obtain a finished product.
2. The process of claim 1, wherein the additives comprise alumina, calcium fluoride, sodium, fluorine and aluminum, the alumina content is 3-8% of the total mass of the additives, the calcium fluoride content is 4-8% of the total mass of the additives, the sodium content is 20-28% of the total mass of the additives, the fluorine content is 45-52% of the total mass of the additives, and the aluminum content is 14-25% of the total mass of the additives according to the step of S1.
3. The process of claim 1, wherein the jaw crusher has a maximum feed particle size of 1020mm and a feed inlet size of 1200 x 1500mm according to the step of S2.
4. The process of claim 1, wherein the step of screening and filtering the mixture powder is performed before the mixture powder is mixed with the binder according to the operation of S5.
5. The process for producing the steelmaking deoxidization fluxing slag refining complexing agent according to the claim 4, wherein the screen mesh of the screening machine is 100-200 mesh, the wire diameter of the screen mesh of the screening machine is 0.05-0.09mm, and the hole diameter of the screen mesh of the screening machine is 0.15-0.075 mm.
6. The process for producing steelmaking deoxidization fluxing slag refining complexing agent according to the claim 1, wherein according to the operation step of S5, the grinding ball diameter of the ball mill is 3-12mm, and the rotating speed of the ball mill is 50 r/min.
7. The process of claim 1, wherein the rotation speed of the stirrer is 300-410r/min and the running time of the stirrer is 15-20min according to the operation step of S5.
8. The process for producing the steelmaking deoxidization fluxing slag refining complexing agent according to the claim 1, wherein according to the operation step of S5, the high pressure ball press machine produces the mixture with the ball diameter of 5-50mm, and the rotating speed of the main shaft of the high pressure ball press machine is 11 r/min.
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| CN202011014695.0A CN112195311A (en) | 2020-09-24 | 2020-09-24 | Process for producing steelmaking deoxidization fluxing slag refining complexing agent by using waste electrolyte |
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| CN202011014695.0A CN112195311A (en) | 2020-09-24 | 2020-09-24 | Process for producing steelmaking deoxidization fluxing slag refining complexing agent by using waste electrolyte |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114854941A (en) * | 2022-05-11 | 2022-08-05 | 邹平积华环保科技有限公司 | Flux for steelmaking and preparation method thereof |
| CN115612785A (en) * | 2022-10-31 | 2023-01-17 | 西安建筑科技大学 | Steelmaking dephosphorizing agent prepared from electric arc furnace dust removal ash and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109628695A (en) * | 2019-01-29 | 2019-04-16 | 新疆中合大正冶金科技有限公司 | A kind of technique using the production LF submerged arc refining agent of electrolytic aluminium slag from delining |
| CN109735678A (en) * | 2019-02-21 | 2019-05-10 | 新疆中合大正冶金科技有限公司 | A method of converter slagging agent is produced using electrolytic aluminium slag from delining |
-
2020
- 2020-09-24 CN CN202011014695.0A patent/CN112195311A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109628695A (en) * | 2019-01-29 | 2019-04-16 | 新疆中合大正冶金科技有限公司 | A kind of technique using the production LF submerged arc refining agent of electrolytic aluminium slag from delining |
| CN109735678A (en) * | 2019-02-21 | 2019-05-10 | 新疆中合大正冶金科技有限公司 | A method of converter slagging agent is produced using electrolytic aluminium slag from delining |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114854941A (en) * | 2022-05-11 | 2022-08-05 | 邹平积华环保科技有限公司 | Flux for steelmaking and preparation method thereof |
| CN115612785A (en) * | 2022-10-31 | 2023-01-17 | 西安建筑科技大学 | Steelmaking dephosphorizing agent prepared from electric arc furnace dust removal ash and preparation method and application thereof |
| CN115612785B (en) * | 2022-10-31 | 2024-01-26 | 西安建筑科技大学 | Steelmaking dephosphorization agent prepared from electric arc furnace dust removal ash, and preparation method and application thereof |
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