CN109321705A - Environment-friendly type pneumatic steelmaking slagging agent and preparation method thereof - Google Patents
Environment-friendly type pneumatic steelmaking slagging agent and preparation method thereof Download PDFInfo
- Publication number
- CN109321705A CN109321705A CN201811505471.2A CN201811505471A CN109321705A CN 109321705 A CN109321705 A CN 109321705A CN 201811505471 A CN201811505471 A CN 201811505471A CN 109321705 A CN109321705 A CN 109321705A
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- CN
- China
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- type pneumatic
- friendly type
- environment
- pneumatic steelmaking
- steel
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Classifications
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
-
- 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
-
- 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 present invention relates to environment-friendly type pneumatic steelmaking slagging agents and preparation method thereof, belong to Ferrous Metallurgy converter steeling technology field.Present invention solves the technical problem that being that the generally existing comprehensive utilization of waste difficulty of metallurgical process is big.Guarantor's type pneumatic steelmaking slagging agent provided by the invention mainly by 10-25 parts of steelmaking converter sludge, steel-making dedusting ash 20-35 part, tundish give up dry materials 10-20 parts, 40-50 parts of quartz sand, 5-10 parts of bonding agent be prepared, dedusting ash is first homogenized processing, then after mixing with other raw materials according to formula, pelletizing slagging agent is made using pressure ball granulation, drying, cooling technique.The present invention realizes to be recycled inside waste resource, has apparent environmentally friendly social benefit, while reducing the production cost of slag decomposing agent for smelting steel product, has larger economic benefit.
Description
Technical field
The invention belongs to Ferrous Metallurgy converter steeling technology fields, and in particular to environment-friendly type pneumatic steelmaking slagging agent and its system
Preparation Method.
Background technique
Converter slag-making is the key operation of converter smelting, and Fast Slag Melting is the core content of converter slag-making.To reach more
Good dephosphorization effect, steel-making initial stage just must rapid slagging, formed have certain basicity, low melting point, good fluidity clinker.It adopts
It is exactly to promote converter Fast Slag Melting with slagging agent.In addition, for protection converter lining, it usually needs with addition of part in smelting
Dolomitic lime is to increase content of MgO in clinker.However, the generally existing comprehensive utilization of waste difficulty of current steel mill metallurgical process
Big problem, and slagging agent often contains CaF2, pollute the environment, and slagging speed is slow, cause dephosphorization effect poor.
Summary of the invention
Present invention solves the technical problem that being that the generally existing comprehensive utilization of waste difficulty of metallurgical process is big.
Technical proposal that the invention solves the above-mentioned problems is to provide environment-friendly type pneumatic steelmaking slagging agent, including following component:
It is in parts by mass
Wherein, steel-making tundish gives up dry materials as the generation of steel-making continuous casting process, and tundish uses waste after offline disintegration.
Wherein, the mass percentage of each component is TFe 45-65%, SiO in steelmaking converter sludge23-5%, CaO
12-18%, P 0.05-0.08%, S 0.07-0.11%, remaining is inevitable impurity.
Wherein, the mass percentage for making steel each component in dedusting ash is TFe 25-35%, SiO25-15%, MgO 7-
12%, CaO 15-25%, P 0.04-0.08%, S 0.65-0.85%, remaining is inevitable impurity.
Wherein, the mass percentage of each component is MgO 58-68%, SiO in the useless dry materials of tundish29-13%,
CaO 3-5%, P 0.05-0.08%, S 0.08-0.10%, TFe 5-8%, remaining is inevitable impurity.
Wherein, dedusting ash is made steel, the granularity of bonding agent is 200-325 mesh.
Wherein, the partial size of rest materials is 0-5mm.
Wherein, bonding agent is at least one of cement, soda ash.
Preferably, the present invention provides environment-friendly type pneumatic steelmaking slagging agent, including following component: in parts by mass for
The present invention also provides the preparation method of above-mentioned environment-friendly type pneumatic steelmaking slagging agent, step includes carrying out dedusting ash
After then mixing with other raw materials according to formula, pelletizing slugging is made using pressure ball granulation, drying, cooling technique in change processing
Agent, homogenizing processing are that water spray carries out digestion process to CaO in converter dust-removing ash in whipping process.
Beneficial effects of the present invention:
Steel plant's steelmaking converter sludge, steel-making dedusting ash, tundish are given up what dry materials etc. were difficult to comprehensively utilize by the present invention
Waste is as the important component for preparing slagging agent so that these wastes are recycled, solve above-mentioned material stack or
The pollution problem to environment is filled, realizes and is recycled inside waste resource, there is apparent environmentally friendly social benefit, reduce simultaneously
The production cost of slag decomposing agent for smelting steel product has larger economic benefit；
The pneumatic steelmaking slagging agent that the present invention is prepared, can effectively shorten sludging time, can bessemerize
Initial stage rapid slagging improves dephosphorization effect in smelting process, achievees the purpose that high efficiency dephosphorating；
The invention avoids CaF2Use, and wherein give up dry materials bring a certain amount of magnesia into, can reduce initial stage slag
Furnace lining is protected in erosion to furnace lining, improves furnace life, while reducing dolomitic lime additional amount.
Specific embodiment
The present invention provides environment-friendly type pneumatic steelmaking slagging agent, including following component: in parts by mass for
Wherein, the mass percentage of each component is TFe 45-65%, SiO in steelmaking converter sludge23-5%, CaO
12-18%, P 0.05-0.08%, S 0.07-0.11%, remaining is inevitable impurity.Converter mud is refined from converter
Steel wet dedusting generates a large amount of flue dust in steelmaking process and produces a large amount of dirt after wet dedusting precipitating is dry
Mud.
Wherein, the mass percentage for making steel each component in dedusting ash is TFe 25-35%, SiO25-15%, MgO 7-
12%, CaO 15-25%, P 0.04-0.08%, S 0.65-0.85%, remaining is inevitable impurity.Make steel dedusting ash
The dust collected by negative pressure generated including positions such as desulfurization process, steel making working procedure, refining procedure and ground blanking bins.
Wherein, the mass percentage of each component is MgO 58-68%, SiO in the useless dry materials of tundish29-13%,
CaO 3-5%, P 0.05-0.08%, S 0.08-0.10%, TFe 5-8%, remaining is inevitable impurity.Steel-making is intermediate
Useless dry materials are wrapped as the generation of steel-making continuous casting process, tundish uses waste after offline disintegration.
Wherein, dedusting ash is made steel, the granularity of bonding agent is 200-325 mesh.
Wherein, it is 0-5mm that rest materials, which are partial size,.
Wherein, at least one of cement, soda ash can be selected in bonding agent.
Preferably, the present invention provides environment-friendly type pneumatic steelmaking slagging agent, including following component: in parts by mass for
The present invention also provides the preparation method of above-mentioned environment-friendly type pneumatic steelmaking slagging agent, step includes carrying out dedusting ash
After then mixing with other raw materials according to formula, pelletizing slugging is made using pressure ball granulation, drying, cooling technique in change processing
Agent.
Each process dedusting ash component unevenness, especially desulfurization and dedusting ash S content mean value are made steel up to 1.6%, it is difficult to directly single
Solely utilize.In addition, due to containing CaO in dedusting ash CaO chance water expanded by heating easily occurring in globulation, pelletizing being caused to crack
Phenomenon.Therefore, dedusting ash is first homogenized processing by the present invention, i.e., in whipping process water spray to converter dust-removing ash in CaO into
Row digestion process, ingredient is uniform after processing for dedusting ash, it is ensured that slagging agent stable components.
The following further explains the present invention by way of examples.
Embodiment 1
25 mass parts converter dust-removing ashes are homogenized processing by the present embodiment, then with 10 mass parts steelmaking converter sludge,
15 mass parts tundish give up dry materials, 45 mass parts quartz sands, 5 mass parts bonding agents be uniformly mixed, through pelletizing, drying, cooling
Environment-friendly type pneumatic steelmaking slagging agent is obtained, each component and its mass fraction are shown in Table 1.
Table 1
| Component | TFe | SiO2 | CaO | MgO | P | S |
| Content % | 10.39 | 46.59 | 9.70 | 13.92 | 0.031 | 0.310 |
Slagging agent first slag provided in this embodiment forms speed and dephosphorization is high-efficient；Slag former provided by the invention is recyclable
Iron and magnesia in sludge, reduce steel technology, the slag former provided using the present embodiment 1, while can save steel
1.26 kg/ton of steel of raw material.
Embodiment 2
20 mass parts dedusting ash of converter is homogenized processing by the present embodiment, then with 15 mass parts steelmaking converter sludge,
10 mass parts tundish give up dry materials, 45 mass parts quartz sands, 5 mass parts bonding agents be uniformly mixed, through pelletizing, drying, cooling
Environment-friendly type pneumatic steelmaking slagging agent is obtained, each component and its mass fraction are shown in Table 2.
Table 2
| Component | TFe | SiO2 | CaO | MgO | P | S |
| Content % | 12.36 | 45.98 | 10.45 | 12.47 | 0.028 | 0.289 |
Slagging agent first slag provided in this embodiment forms speed and dephosphorization is high-efficient；Slag former provided by the invention is recyclable
Iron and magnesia in sludge, reduce steel technology, the slag former provided using the present embodiment 2, while can save steel
1.52 kg/ton of steel of raw material.
Embodiment 3
30 mass parts converter dust-removing ashes are homogenized processing by the present embodiment, then with 25 mass parts steelmaking converter sludge,
15 mass parts tundish give up dry materials, 45 mass parts quartz sands, 10 mass parts bonding agents be uniformly mixed, through pelletizing, drying, cooling
Environment-friendly type pneumatic steelmaking slagging agent is obtained, each component and its mass fraction are shown in Table 3.
Table 3
| Component | TFe | SiO2 | CaO | MgO | P | S |
| Content % | 11.54 | 47.69 | 9.48 | 11.58 | 0.026 | 0.302 |
Slagging agent first slag provided in this embodiment forms speed and dephosphorization is high-efficient；Slag former provided by the invention is recyclable
Iron and magnesia in sludge, reduce steel technology, the slag former provided using the present embodiment 3, while can save steel
1.47 kg/ton of steel of raw material.
Claims (9)
1. environment-friendly type pneumatic steelmaking slagging agent, it is characterised in that be prepared including following component: in parts by mass for
Wherein, tundish gives up dry materials as the generation of steel-making continuous casting process, and tundish uses waste after offline disintegration.
2. environment-friendly type pneumatic steelmaking slagging agent according to claim 1, it is characterised in that: each in the steelmaking converter sludge
The mass percentage of component is TFe 45-65%, SiO23-5%, CaO 12-18%, P 0.05-0.08%, S 0.07-
0.11%, remaining is inevitable impurity.
3. environment-friendly type pneumatic steelmaking slagging agent according to claim 1 or 2, it is characterised in that: in the steel-making dedusting ash
The mass percentage of each component is TFe 25-35%, SiO25-15%, MgO 7-12%, CaO 15-25%, P 0.04-
0.08%, S 0.65-0.85%, remaining is inevitable impurity.
4. described in any item environment-friendly type pneumatic steelmaking slagging agents according to claim 1~3, it is characterised in that: the tundish
The mass percentage of each component is MgO 58-68%, SiO in useless dry materials29-13%, CaO 3-5%, P 0.05-
0.08%, S 0.08-0.10%, TFe 5-8%, remaining is inevitable impurity.
5. environment-friendly type pneumatic steelmaking slagging agent according to any one of claims 1 to 4, it is characterised in that: the steel-making removes
Dust, the granularity of bonding agent are 200-325 mesh.
6. described in any item environment-friendly type pneumatic steelmaking slagging agents according to claim 1~5, it is characterised in that: the steel-making turns
The partial size of the useless dry materials of furnace sludge, tundish and quartz sand is 0-5mm.
7. described in any item environment-friendly type pneumatic steelmaking slagging agents according to claim 1~6, spy is that the bonding agent is water
At least one of mud, soda ash.
8. described in any item environment-friendly type pneumatic steelmaking slagging agents, spy are to be prepared by following component according to claim 1~7
Form: in parts by mass for
9. the preparation method of any one of the claim 1~8 environment-friendly type pneumatic steelmaking slagging agent, it is characterised in that including as follows
Step: being homogenized processing for dedusting ash, after then mixing with other raw materials according to formula, using pressure ball granulation, drying, cooling
Technique be made pelletizing slagging agent, homogenizing processing is that water spray carries out digestion process to CaO in converter dust-removing ash in whipping process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811505471.2A CN109321705A (en) | 2018-12-10 | 2018-12-10 | Environment-friendly type pneumatic steelmaking slagging agent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811505471.2A CN109321705A (en) | 2018-12-10 | 2018-12-10 | Environment-friendly type pneumatic steelmaking slagging agent and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110592374A (en) * | 2019-10-21 | 2019-12-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Converter slag melting agent pellet and binder for forming same |
| CN110863077A (en) * | 2019-12-18 | 2020-03-06 | 攀枝花钢城集团有限公司 | Converter steelmaking slag former and preparation method thereof |
| CN110951934A (en) * | 2019-12-20 | 2020-04-03 | 攀枝花钢城集团有限公司 | Comprehensive utilization method of converter fly ash |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110592374A (en) * | 2019-10-21 | 2019-12-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Converter slag melting agent pellet and binder for forming same |
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| CN110863077A (en) * | 2019-12-18 | 2020-03-06 | 攀枝花钢城集团有限公司 | Converter steelmaking slag former and preparation method thereof |
| CN110951934A (en) * | 2019-12-20 | 2020-04-03 | 攀枝花钢城集团有限公司 | Comprehensive utilization method of converter fly ash |
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Application publication date: 20190212 |
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