CN116871306A - Steelmaking metal solid waste treatment method - Google Patents
Steelmaking metal solid waste treatment method Download PDFInfo
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- CN116871306A CN116871306A CN202310788864.3A CN202310788864A CN116871306A CN 116871306 A CN116871306 A CN 116871306A CN 202310788864 A CN202310788864 A CN 202310788864A CN 116871306 A CN116871306 A CN 116871306A
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- Prior art keywords
- slag
- waste
- desulfurization slag
- desulfurization
- steel
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- 239000002184 metal Substances 0.000 title claims abstract description 73
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 73
- 238000009628 steelmaking Methods 0.000 title claims abstract description 29
- 238000009270 solid waste treatment Methods 0.000 title abstract description 8
- 239000002893 slag Substances 0.000 claims abstract description 140
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 97
- 230000023556 desulfurization Effects 0.000 claims abstract description 97
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000002699 waste material Substances 0.000 claims abstract description 49
- 239000002910 solid waste Substances 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 39
- 229910052742 iron Inorganic materials 0.000 claims abstract description 29
- 239000012535 impurity Substances 0.000 claims abstract description 26
- 238000003723 Smelting Methods 0.000 claims abstract description 11
- 238000012216 screening Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 28
- 239000010959 steel Substances 0.000 claims description 28
- 239000010881 fly ash Substances 0.000 claims description 11
- 239000004115 Sodium Silicate Substances 0.000 claims description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 10
- 239000002956 ash Substances 0.000 claims description 8
- 239000002826 coolant Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 2
- 238000003672 processing method Methods 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 11
- 238000004064 recycling Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000000428 dust Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/80—Destroying solid waste or transforming solid waste into something useful or harmless involving an extraction step
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/30—Destroying solid waste or transforming solid waste into something useful or harmless involving mechanical treatment
- B09B3/35—Shredding, crushing or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/70—Chemical treatment, e.g. pH adjustment or oxidation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B2101/00—Type of solid waste
- B09B2101/55—Slag
-
- 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
Abstract
The application relates to the technical field of steelmaking, in particular to a steelmaking metal solid waste treatment method. The processing method comprises the following steps: screening the desulfurization slag into a first part of desulfurization slag and a second part of desulfurization slag, wherein the diameter of the first part of desulfurization slag is smaller than or equal to a value a, and the diameter of the second part of desulfurization slag is larger than the value a; adding the first part of desulfurization slag into a ladle, wherein molten iron in the ladle can melt metal components in the first part of desulfurization slag so as to separate out nonmetallic impurities; adding the second part of desulfurization slag into a converter for smelting, wherein the converter can melt metal components in the second part of desulfurization slag to separate out nonmetallic impurities; separating out nonmetallic impurities, and finishing the treatment of the desulfurization slag. The method for treating the steel-making metal solid waste provided by the application has the advantages that the metal components in the desulfurization slag are recovered through the molten iron and the converter, and only nonmetallic impurities are needed to be separated, so that the waste emission is reduced, and the cost is reduced.
Description
Technical Field
The application relates to the technical field of steelmaking, in particular to a steelmaking metal solid waste treatment method.
Background
The steelmaking rectification process flow is that the blast furnace molten iron firstly enters a KR desulfurization station to carry out desulfurization operation, then enters a converter to smelt the molten iron into molten steel, then enters refining to carry out fine adjustment, and finally is cast into billets through a casting machine. In the related art, a large amount of metal solid wastes are generated in the whole production process of the steel billet, and the treatment of the metal solid wastes can cause a large amount of waste discharge, so that the implementation cost is high.
Disclosure of Invention
The application provides a steelmaking metal solid waste treatment method, which solves the technical problems of large waste emission caused by metal solid waste treatment in the related technology and high implementation cost.
The application provides a method for treating steel-making metal solid waste, wherein the metal solid waste comprises desulfurization slag, and the method comprises the following steps:
screening the desulfurization slag into a first part of desulfurization slag and a second part of desulfurization slag, wherein the diameter of the first part of desulfurization slag is smaller than or equal to a value a, and the diameter of the second part of desulfurization slag is larger than the value a;
adding the first part of desulfurization slag into a ladle, wherein molten iron in the ladle can melt metal components in the first part of desulfurization slag so as to separate out nonmetallic impurities; adding the second part of desulfurization slag into a converter for smelting, wherein the converter can melt metal components in the second part of desulfurization slag to separate out nonmetallic impurities;
separating out the nonmetallic impurities, and finishing the treatment of the desulfurization slag.
In some embodiments, the value a is 130mm.
In some embodiments, the metal solid waste further comprises waste residue, and the treatment method further comprises:
screening the waste slag into a first part of waste slag and a second part of waste slag, wherein the metal rate of the first part of waste slag is smaller than or equal to a value b, and the metal rate of the second part of waste slag is larger than the value b;
the first part of waste slag is used as roadbed materials, and the second part of waste slag is added into a converter for smelting so as to separate out nonmetallic impurities;
separating out the nonmetallic impurities, and finishing the waste residue treatment.
In some embodiments, the screening the waste residue into a first portion of waste residue and a second portion of waste residue specifically comprises:
cutting and grinding the waste residues, and then screening the waste residues into a first part of waste residues and a second part of waste residues.
In some embodiments, the value of b is 55-65%.
In some embodiments, the metal solid waste further comprises waste residue fly ash, and the treatment method further comprises:
and adding sodium silicate gel into the dust-removing ash to manufacture the dust-removing ash into cold-set balls, and using the cold-set balls as a coolant.
In some embodiments, the cold set ball is used as a coolant, and specifically includes: and transferring the cold-set balls into a steelmaking high-level bin to be used as a coolant.
In some embodiments, the sodium silicate gum is at a concentration of 5.5-6%.
In some embodiments, the sodium silicate gum has a baume of 43% and a modulus of 2.6 to 2.9%.
In some embodiments, the metal solid waste further comprises a head and a tail of a slab, and the treatment method further comprises: cutting the head and the tail of the billet into small billets, and smelting the small billets into molten steel.
The application has the following beneficial effects:
according to the steel-making metal solid waste treatment method provided by the application, the desulfurization slag in the metal solid waste is screened into the first part desulfurization slag with the diameter smaller than or equal to the value a and the second part desulfurization slag with the diameter larger than the value a according to the size, then the first part desulfurization slag is added into a ladle, and molten iron in the ladle can be used for melting metal components in the first part desulfurization slag, so that the content of molten iron is increased, the recycling of the metal components in the small-diameter desulfurization slag is realized, and nonmetallic impurities are separated out; the second part of the desulfurization slag is added into a converter, and the converter can melt metal components in the second part of the desulfurization slag, so that the molten steel content is increased, the recycling of the metal components in the large-diameter desulfurization slag is realized, nonmetallic impurities are separated out, and the treatment of the desulfurization slag is completed.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application.
FIG. 1 is a flow chart of a method for treating steel-making metal solid wastes, which is provided by an embodiment of the application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The steelmaking rectification process flow is that the blast furnace molten iron firstly enters a KR desulfurization station to carry out desulfurization operation, then enters a converter to smelt the molten iron into molten steel, then enters refining to carry out fine adjustment components (comprising 2 RH, 1 CAS and 1 LF), and finally is cast into billets through a casting machine. The whole production flow of the steel billet is produced by different kinds of metal solid wastes according to different processes and equipment, and the components and the sizes of the metal solid wastes are different due to different production reasons, and meanwhile, the consumption of the metal solid wastes becomes a larger problem.
According to different working procedures, the metal solid wastes generated at present mainly comprise the following steps:
1. the KR desulfurization process is mainly used for preprocessing the molten iron for desulfurization, and slag removal is carried out before and after the molten iron is processed due to the process requirement, so that desulfurization slag is generated, and the solid waste has higher sulfur content and cannot be used in a large area.
2. Molten iron after KR desulfurization treatment enters a converter to carry out steelmaking operation, converter slag, converter lower slag and dust removal ash which are mainly generated in the process are mainly metal solid waste collected by a converter dust removal system, and the converter slag and the converter lower slag are mainly steel slag which is produced in the converter treatment process and after the converter treatment process is finished. The components of the part of steel slag are complex and cannot be consumed in time.
3. The molten steel treated by the converter needs to enter a refining process for fine adjustment of components, and the metal solid waste mainly generated in the process is dust, casting residue, RH cold steel, wrapping edge and slag adhesion. The dedusting ash is metal solid waste generated in the production process, casting residue is metal solid waste generated after the casting of the steel ladle is finished, RH cold steel is metal solid waste generated by the process specificity of RH process equipment, the edge of the steel ladle is metal solid waste cleaned out of the steel ladle, and the bonding slag is bonding slag of CAS and LF equipment.
4. And (3) after the components are finely adjusted, casting the slab in a casting machine, wherein iron scales are formed on the surface layer of the slab, tundish casting residues are formed after casting, and the slab is cut to length and then is subjected to slab head and slab tail.
Based on this, referring to fig. 1, an embodiment of the present application provides a method for treating steel-making metal solid waste, where the metal solid waste includes desulfurization slag, the method comprising:
s1: sieving the desulfurization slag into a first part of desulfurization slag and a second part of desulfurization slag, wherein the diameter of the first part of desulfurization slag is smaller than or equal to a value a, the diameter of the second part of desulfurization slag is larger than the value a,
firstly, hanging a desulfurization slag pot onto a slag ladle through a crown block, transporting the desulfurization slag pot to the rear of a ladle tipping trolley by the slag ladle, scraping iron slag on the surface of iron water in a ladle into the desulfurization slag pot by utilizing a slag plate, transporting the desulfurization slag pot to a water pouring area between steel slag by utilizing the slag ladle, requiring the water content of the slag pot to be 6% -10%, preventing water from overflowing, soaking for 30-60min, pouring the desulfurization slag of the desulfurization slag pot into a slag splashing pool, transporting the desulfurization slag to a desulfurization line through a dump truck, transporting the desulfurization slag onto a belt through a forklift, and crushing and screening the first part of desulfurization slag and the second part of desulfurization slag through a vibrating screen of 1500 x 3600mm and a jaw crusher of 750 x 1060.
Specifically, the value a is 130mm.
S2: adding the first part of desulfurization slag into a ladle, wherein molten iron in the ladle can melt metal components in the first part of desulfurization slag so as to separate out nonmetallic impurities; adding the second part of desulfurization slag into a converter for smelting, wherein the converter can melt metal components in the second part of desulfurization slag to separate out nonmetallic impurities;
transferring the first part of desulfurization slag into a ground bin of a desulfurization station by utilizing a dump truck, transferring the second part of desulfurization slag into a scrap steel room, and adding the first part of desulfurization slag into a ladle through a slag adding machine after the ladle enters a converter and is completely charged with iron, wherein molten iron in the ladle can melt metal components in the first part of desulfurization slag to separate out nonmetallic impurities; transferring the ladle added with the first part of desulfurization slag to a blast furnace to receive molten iron, then entering a desulfurization station to carry out slag skimming and desulfurization (the adding amount of 2t per ladle), enabling the second part of desulfurization slag entering the scrap steel space to enter a scrap steel bucket through a crown block, enabling the adding amount of each bucket to be less than or equal to 8 tons, hanging the scrap steel bucket to a converter mouth, aiming at the converter, adding the scrap steel bucket into the converter, and enabling the converter to melt metal components in the second part of desulfurization slag so as to separate out nonmetallic impurities.
S3: separating out nonmetallic impurities, and finishing the treatment of the desulfurization slag.
The non-metal impurities can be scraped into the slag pot by a slag scraper.
It should be noted that, the granularity of the first portion of the desulphurized slag is small, the first portion of the desulphurized slag can be directly added into the iron ladle after the iron is added, then the molten iron is connected, the first portion of the desulphurized slag enters a desulphurized station to carry out desulphurized slag skimming after the molten iron is connected, so that the cyclic utilization is realized, meanwhile, the first portion of the desulphurized slag has powder particles, has higher sulfur content, is suitable for recycling in the desulphurized station, and the second portion of the desulphurized slag has large size and cannot be added into the iron ladle, even if the second portion of the desulphurized slag is added, the second portion of the desulphurized slag cannot be melted, and the temperature of the molten iron can be influenced. The converter is internally provided with dust removal, and small-granularity desulfurization slag is easy to remove and suck away after being added. Therefore, the desulfurization slag is firstly screened according to the size, the large-size desulfurization slag enters a converter for recycling, and the small-size desulfurization slag enters a ladle for recycling.
According to the steel-making metal solid waste treatment method provided by the application, the desulfurization slag in the metal solid waste is screened into the first part desulfurization slag with the diameter smaller than or equal to the value a and the second part desulfurization slag with the diameter larger than the value a according to the size, then the first part desulfurization slag is added into a ladle, and molten iron in the ladle can be used for melting metal components in the first part desulfurization slag, so that the content of molten iron is increased, the recycling of the metal components in the small-diameter desulfurization slag is realized, and nonmetallic impurities are separated out; the second part of the desulfurization slag is added into a converter, and the converter can melt metal components in the second part of the desulfurization slag, so that the molten steel content is increased, the recycling of the metal components in the large-diameter desulfurization slag is realized, nonmetallic impurities are separated out, and the treatment of the desulfurization slag is completed.
In some embodiments, the metal solid waste further comprises a waste residue comprising converter slag, ladle casting residue, RH cold steel, ladle rim, tundish casting residue, and iron oxide scale, the treatment method further comprising:
t1: screening the waste slag into first part of waste slag and second part of waste slag, wherein the metal rate of the first part of waste slag is smaller than or equal to a value b, and the metal rate of the second part of waste slag is larger than the value b;
the waste residue can be cut and ground, processed into a proper particle size and then screened into a first part of waste residue and a second part of waste residue. In particular, it can be processed to a particle size of less than 130mm in diameter, and b can have a value of 55-65%.
T2: the first part of waste slag is used as roadbed materials, and the second part of waste slag is added into a converter for smelting, so that nonmetallic impurities are separated out;
t3: separating out nonmetallic impurities, and finishing the waste residue treatment.
In some embodiments, the metal solid waste further comprises fly ash, and the treatment method further comprises:
sodium silicate gel is added into the dust-removing ash to make the dust-removing ash into cold-set balls, and the cold-set balls are used as a coolant.
Specifically, the fly ash is transported to a raw material bin of a cold set ball production line through a tank truck and is pumped into the raw material bin of the cold set ball production line, 4.5-5.5% of water is added into the fly ash in the raw material bin, the fly ash is transported to a digestion bin for digestion, and the digested fly ash is transported to a stirrer through a zipper machine and a bucket lift and is added with sodium silicate gel for stirring. After being stirred uniformly, the fly ash of the sodium silicate glue is transferred to a common ball milling ball pressing machine by a zipper machine, the fly ash is pressed into balls, and after being dried by a dryer, the fly ash is transferred to a ground bin by a vehicle, and is transported to a steelmaking high-level bin by a belt to be used as a coolant, and 2t of fly ash is added into each furnace.
Optionally, the concentration of the sodium silicate gel is 5.5-6%, and the components are as follows: fe less than or equal to 0.05%, water insoluble content less than or equal to 0.6%, baume 43%, sodium oxide (Na 2O) content more than or equal to 10.2%, silicon dioxide (SiO 2) content more than or equal to 25.7%, modulus 2.6-2.9%.
The size of the cold set ball is 45mm 35mm, and the components are as follows: less than or equal to 1 percent of total water (Mt), less than or equal to 49 percent of calcium oxide (CaO), less than or equal to 50 percent of total iron (TFe), and less than or equal to 0.1 percent of sulfur (S).
In some embodiments, the metal solid waste further comprises a head and a tail of the slab, and the treatment method further comprises: cutting the head and the tail of the billet into small billets, and smelting the small billets into molten steel.
Specifically, the large-block billet head and tail can be processed into small-block billets through cutting operation, and the small-block billets are transferred into a scrap steel room to replace outsourcing scrap steel, added into a scrap steel bucket and finally added into a converter for smelting.
Of course, the molten steel can be used for drawing out a finished billet by continuous casting, thereby realizing the recycling of the billet head and the billet tail.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. A method for treating steel-making metal solid wastes, characterized in that the metal solid wastes comprise desulfurization residues, the method comprising:
screening the desulfurization slag into a first part of desulfurization slag and a second part of desulfurization slag, wherein the diameter of the first part of desulfurization slag is smaller than or equal to a value a, and the diameter of the second part of desulfurization slag is larger than the value a;
adding the first part of desulfurization slag into a ladle, wherein molten iron in the ladle can melt metal components in the first part of desulfurization slag so as to separate out nonmetallic impurities; adding the second part of desulfurization slag into a converter for smelting, wherein the converter can melt metal components in the second part of desulfurization slag to separate out nonmetallic impurities;
separating out the nonmetallic impurities, and finishing the treatment of the desulfurization slag.
2. The method for treating solid waste of steel-making metal as claimed in claim 1, wherein the value a is 130mm.
3. The method for treating steel-making metal solid wastes according to claim 1, wherein the metal solid wastes further comprise waste residues, the method further comprising:
screening the waste slag into a first part of waste slag and a second part of waste slag, wherein the metal rate of the first part of waste slag is smaller than or equal to a value b, and the metal rate of the second part of waste slag is larger than the value b;
the first part of waste slag is used as roadbed materials, and the second part of waste slag is added into a converter for smelting so as to separate out nonmetallic impurities;
separating out the nonmetallic impurities, and finishing the waste residue treatment.
4. The method for treating solid waste of steel-making metal as claimed in claim 3, wherein said screening said waste slag into a first portion of waste slag and a second portion of waste slag comprises:
cutting and grinding the waste residues, and then screening the waste residues into a first part of waste residues and a second part of waste residues.
5. The method for treating solid waste of steel-making metal as claimed in claim 3, wherein the value of b is 55 to 65%.
6. The method for treating steel-making metal solid waste as claimed in claim 1, wherein said metal solid waste further comprises waste residue fly ash, said method further comprising:
and adding sodium silicate gel into the dust-removing ash to manufacture the dust-removing ash into cold-set balls, and using the cold-set balls as a coolant.
7. The method for treating steel-making metal solid wastes according to claim 6, wherein said cold-set balls are used as a coolant, comprising: and transferring the cold-set balls into a steelmaking high-level bin to be used as a coolant.
8. The method for treating steel-making metal solid wastes according to claim 6, wherein the concentration of the sodium silicate gel is 5.5 to 6%.
9. The method for treating solid waste of steel-making metal as claimed in claim 6, wherein the sodium silicate gel has a baume of 43% and a modulus of 2.6 to 2.9%.
10. The method for treating steel-making metal solid wastes according to claim 1, wherein the metal solid wastes further comprise head and tail portions of slabs, the method further comprising: cutting the head and the tail of the billet into small billets, and smelting the small billets into molten steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310788864.3A CN116871306A (en) | 2023-06-30 | 2023-06-30 | Steelmaking metal solid waste treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310788864.3A CN116871306A (en) | 2023-06-30 | 2023-06-30 | Steelmaking metal solid waste treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116871306A true CN116871306A (en) | 2023-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310788864.3A Pending CN116871306A (en) | 2023-06-30 | 2023-06-30 | Steelmaking metal solid waste treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116871306A (en) |
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2023
- 2023-06-30 CN CN202310788864.3A patent/CN116871306A/en active Pending
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