CN116463476A - Novel slag former for semisteel steelmaking production and preparation method thereof - Google Patents
Novel slag former for semisteel steelmaking production and preparation method thereof Download PDFInfo
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- CN116463476A CN116463476A CN202310385610.7A CN202310385610A CN116463476A CN 116463476 A CN116463476 A CN 116463476A CN 202310385610 A CN202310385610 A CN 202310385610A CN 116463476 A CN116463476 A CN 116463476A
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- 239000002893 slag Substances 0.000 title claims abstract description 117
- 238000009628 steelmaking Methods 0.000 title claims abstract description 75
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000002699 waste material Substances 0.000 claims abstract description 60
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910000616 Ferromanganese Inorganic materials 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 35
- 239000000428 dust Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 22
- 239000006004 Quartz sand Substances 0.000 claims abstract description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011230 binding agent Substances 0.000 claims abstract description 19
- 239000010936 titanium Substances 0.000 claims abstract description 17
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 17
- 238000009749 continuous casting Methods 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 150000003839 salts Chemical class 0.000 claims description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- 239000005416 organic matter Substances 0.000 claims description 6
- 239000011572 manganese Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 229910021487 silica fume Inorganic materials 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims 1
- 239000010802 sludge Substances 0.000 abstract description 11
- 239000002994 raw material Substances 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 description 24
- 239000010959 steel Substances 0.000 description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 15
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 6
- 235000011941 Tilia x europaea Nutrition 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000004571 lime Substances 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 239000011574 phosphorus Substances 0.000 description 5
- 229910052698 phosphorus Inorganic materials 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 229910052720 vanadium Inorganic materials 0.000 description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000011419 magnesium lime Substances 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229960004887 ferric hydroxide Drugs 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
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
- 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
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a novel slag former for semisteel steelmaking production and a preparation method thereof, wherein the novel slag former comprises the following components: steel-making dust, ferro-manganese slag, waste tundish dry material, quartz sand and binder. The novel slag former is added with the ferro-manganese slag and the tundish waste dry material, has no influence on the original process, does not produce a large amount of harmful substances, can replace steelmaking dust and steelmaking sludge to produce the slag former, solves the problems of waste ferro-manganese slag generated in the titanium resource development process, waste tundish generated in the steelmaking continuous casting production process and the like, realizes the aim of changing waste into valuables, reduces the steelmaking dust and sludge amount, and can be used as a sinter raw material for adding.
Description
Technical Field
The invention relates to the technical field of ferrous metallurgy, in particular to a novel slag former for semisteel steelmaking and a preparation method thereof.
Background
The steel mill adopts the processes of spray vanadium extraction, converter vanadium extraction and the like to extract metals such as vanadium and titanium, the molten iron after the treatment has low silicon and manganese content, and certain smelting loss of carbon, namely semisteel. Slag formers are added in the semisteel entering into the smelting process of the steelmaking converter to participate in slag formation in the steelmaking process so as to ensure that slag with corresponding metallurgical effects is formed. The existing converter slag former is an environment-friendly product produced by taking steelmaking dust and sludge as main raw materials and adding quartz sand and other raw materials according to a certain proportion, and the technical index requirements are shown in a table 1 and a table 2.
Table 1 converter slag former formulation
| Name of the name | Dust-removing ash | Quartz sand | Steelmaking sludge | Adhesive agent |
| Mass fraction ratio/% | 42 | 43 | 0～10 | 5 |
Table 2 technical index requirements for converter slag formers
The existing slag former adopts a ball pressing mode with steelmaking dust and quartz sand as main raw materials, the sulfur content is close to 0.2 percent, the average increase [ S ] of molten steel is 0.002 to 0.005 percent in the use process, and the difficulty is brought to smelting ultra-low sulfur steel (the steel grade is judged that the S is less than or equal to 0.005 percent).
In addition, about 90% of the titanium resources in China are assigned to vanadium titanomagnetite in Panxi area, and the development of the titanium resources comprises titanium dioxide, titanium sponge, titanium metal, titanium alloy and the like, wherein a large amount of waste salts are generated when the titanium sponge is obtained through a molten salt chlorination method, and the waste salts cannot be directly discharged due to the fact that the waste salts contain higher chloride ions. The method of crushing, lime mixing and piling is generally adopted in China for treatment, and the pollution of chloride to the environment is not fundamentally solved, so that the popularization and the application of a molten salt chlorination method are hindered, and the titanium resources in China cannot be utilized in a large-scale and high-end manner. In order to meet the production requirements of the high-end titanium industry, waste salt needs to be treated, and main dry basis substances of byproducts generated in the treatment process of the waste salt are ferromanganese slag (namely, dry basis ferric hydroxide mixture), belong to metal oxides such as iron, manganese and the like, contain Fe (25% -38%), mn (about 4% -5%), and have practical utilization values.
In addition, about 2 ten thousand tons of waste continuous casting tundish are generated each year in the steelmaking process, and the waste continuous casting tundish contains MgO with higher components and has recycling value, and the waste continuous casting tundish is crushed and is called as waste tundish dry material, and the chemical components are shown in Table 3.
TABLE 3 Main chemical Components of waste tundish Dry Material
Therefore, in order to solve the problems of recycling of waste ferro-manganese slag generated in the development process of titanium resources and waste of continuous casting, the patent performs exploration tests in the aspect of producing steelmaking slag formers and verifies the feasibility of the steelmaking slag formers.
Disclosure of Invention
The invention aims to provide a novel slag former for semisteel steelmaking and a preparation method thereof, which are used for solving the problem of how to prepare the slag former by utilizing waste iron-manganese slag and continuous casting waste generated in the development process of titanium resources.
In order to achieve the above object, the present invention provides a novel slag former for steel-making production of semisteel, the novel slag former comprising: steel-making dust, ferro-manganese slag, waste tundish dry material, quartz sand and binder.
Optionally, the steelmaking dust, the ferro-manganese slag, the waste tundish dry material, the quartz sand and the binder are 25%, 10%, 50% and 5% by mass respectively.
Optionally, the steelmaking dust, the ferro-manganese slag, the waste tundish dry material, the quartz sand and the binder are 25%, 15%, 10%, 45% and 5% by mass respectively.
Optionally, crushing the waste continuous casting tundish generated in the steelmaking process to obtain the waste tundish dry material.
Optionally, treating waste salt generated by titanium resource development to obtain the ferro-manganese slag.
Optionally, the Fe content in the ferro-manganese slag is about 25% -38%, and the Mn content is about 4% -5%.
Optionally, the main component in the waste tundish dry material is MgO.
Optionally, the steelmaking dust removal ash comprises: caO, mgO, siO 2 And FeO.
Optionally, the binder includes: organic matter and inorganic matter, wherein, the organic matter includes: carboxymethyl cellulose, the inorganic substance includes: sodium carbonate, bentonite, silica fume, etc.
The invention also provides a preparation method of the novel slag former for semisteel steelmaking production, which comprises the following steps:
uniformly mixing steelmaking dust, ferro-manganese slag, waste tundish dry material, quartz sand and binder according to a proportion to obtain a mixture;
performing ball pressing operation on the mixture to obtain balls;
and drying the spherical objects to obtain the novel slag former.
The invention has the technical effects and advantages that:
the invention provides a novel slag former for semisteel steelmaking production, which comprises the following components in percentage by weight: steel-making dust, ferro-manganese slag, waste tundish dry material, quartz sand and binder. The novel slag former is added with the ferro-manganese slag and the tundish waste dry material, has no influence on the original process, does not produce a large amount of harmful substances, can replace steelmaking dust and steelmaking sludge to produce the slag former, solves the problems of waste ferro-manganese slag generated in the titanium resource development process, waste tundish generated in the steelmaking continuous casting production process and the like, realizes the aim of changing waste into valuables, reduces the steelmaking dust and sludge amount, and can be used as a sinter raw material for adding.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
FIG. 1 is a flow chart of a method of preparing a novel slag former for use in semisteel steelmaking.
Detailed Description
The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, the structures, proportions, sizes and the like shown in the drawings attached to the present specification are used for understanding and reading only in conjunction with the disclosure of the present specification, and are not intended to limit the applicable limitations of the present invention, so that any modification of the structures, variation of proportions or adjustment of sizes of the structures, proportions and the like should not be construed as essential to the present invention, and should still fall within the scope of the disclosure of the present invention without affecting the efficacy and achievement of the present invention. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
In order to solve the defects of the prior art, the invention discloses a novel slag former for semisteel steelmaking production, which comprises the following components: steel-making dust, ferro-manganese slag, waste tundish dry material, quartz sand and binder. The invention prepares the slag former by utilizing waste iron-manganese slag and continuous casting waste generated in the development process of titanium resources, thereby realizing effective utilization of resources and relieving the problems of environmental pollution and the like.
For a better understanding of the present solution, a detailed description of a novel slag former for use in the steelmaking of semisteel follows.
The novel slag former comprises: steel-making dust, ferro-manganese slag, waste tundish dry material, quartz sand and binder.
In order to recycle waste iron-manganese slag generated in the development process of titanium resources and waste tundish dry material generated in the steelmaking continuous casting production process, novel slag formers are prepared from the two wastes according to the table 4. Formula I: the mass percentages of the steelmaking dust, the ferro-manganese slag, the waste tundish dry material, the quartz sand and the binder are 25%, 10%, 50% and 5% respectively. And the formula II: the mass percentages of the steelmaking dust, the ferro-manganese slag, the waste tundish dry material, the quartz sand and the binder are 25%, 15%, 10%, 45% and 5% respectively.
Table 4 raw material ratio of novel slag former
It is also noted that the scrap ladle generated in the steelmaking process is crushed to obtain the scrap ladle dry material. Wherein the main component in the waste tundish dry material is MgO.
The waste salt generated by the development of the titanium resource is treated to obtain the ferro-manganese slag. Wherein, the Fe content in the ferro-manganese slag is about 25% -38%, and the Mn content is about 4% -5%.
The dust-collecting ash of steel-making converter is produced during smeltingThe smoke dust particles produced in the steel production process comprise CaO, mgO, siO 2 FeO, etc.
It should also be noted that the binder includes: organic matter and inorganic matter, wherein, the organic matter includes: carboxymethyl cellulose, the inorganic substance includes: sodium carbonate, bentonite, silica fume, etc.
It should be noted that the technical index requirements of the novel slag former are shown in table 5.
Table 5 technical index requirements for novel slag formers
| Composition of the components | SiO 2 | MgO | TFe | P | S | Moisture content |
| Requirement (%) | 50～60 | ≥5 | ≥10 | ≤0.1 | ≤0.2 | ≤1.0 |
To illustrate the feasibility of the novel slag former, several aspects are explained below.
Novel slag former chemical detection result
The novel slag former was sampled during use, with the following results:
TABLE 6 novel slag former compositions
As can be seen from table 6: the chemical components of the novel slag former of the two formulas meet the technical index requirements of the slag former of the converter, wherein the S element is less than 0.070, and compared with the S element (see table 2) in the prior slag former of the converter, the novel slag former of the two formulas greatly reduces the phenomenon of 'sulfur return' in the steelmaking process, and improves the smelting rate of the variety steel.
(II) addition and use conditions of novel slag former
1. Scheme 1 test heat: the addition of auxiliary materials such as lime, slag former and the like is carried out according to the existing regulations, and the alkalinity of the end slag is controlled to be 3-4. Wherein, current regulations are: the addition amount of lime is 22Kg/t steel-30 Kg/t steel, and the addition amount of slag former is 12Kg/t steel-14 Kg/t steel.
Scheme 2 test heat: the addition amount of the slag former is 1.1 times of that of the prior regulation, and the rest auxiliary materials are controlled to be 3-4 according to the slag condition and the molten steel component requirement. Wherein, current regulations are: the addition amount of lime is 22Kg/t steel-30 Kg/t steel, and the addition amount of slag former is 13Kg/t steel-15 Kg/t steel.
2. The molten iron conditions during use are shown in table 7. In terms of the addition amount of molten iron, the two schemes are basically consistent with the comparison heat. The average temperature of the charging of the comparison heat is 1313.7 ℃, which is slightly lower than that of the scheme 1 and the scheme 2, and the charging temperature of the novel slag former test heat is 12-24 ℃ higher than that of the comparison heat; the average tapping temperature of industrial mass production is 1651.1 ℃, which is lower than scheme 2 and higher than scheme 1, and the fact that the ratio of the two ferro-manganese slag has little influence on the tapping temperature is shown. The phosphorus content of the steel can be obtained from a small platform, and the phosphorus content is gradually reduced along with the addition of the ferro-manganese slag and the waste tundish dry material, so that the cold brittleness of the steel is reduced, and the plasticity and toughness of the steel at normal temperature are improved.
Wherein, the comparative example is steelmaking process data of slag former (prepared according to quartz sand and steelmaking sludge) in the background.
TABLE 7 molten iron conditions and smelting parameters
| Type(s) | Molten iron/t | Furnace temperature/°c | Tapping temperature/DEGC | Small plateau phosphorus content/% |
| Comparison | 134.40 | 1313.7 | 1651.1 | 0.013 |
| Scheme 1 | 133.85 | 1325.5 | 1647.5 | 0.012 |
| Scheme 2 | 134.66 | 1337.5 | 1655.7 | 0.011 |
The two schemes and the comparison of the furnace active lime and the high magnesium lime are basically unchanged, which shows that the addition of the ferro-manganese slag and the tundish waste dry material has no influence on slag formation in the steelmaking process, as shown in the table 8.
Table 8 steelmaking material consumption (kg/ton steel)
| Type(s) | Slag former for use in the prior art | Novel slag former | Active lime | High magnesium lime |
| Comparison | 17.76 | \ | 20.76 | 16.93 |
| Scheme 1 | \ | 17.21 | 20.89 | 17.12 |
| Scheme 2 | \ | 20.62 | 20.94 | 15.97 |
The two schemes are basically equivalent to the comparison of the heat, and the terminal carbon content is closely related to the smelting steel grade. The phosphorus content is reduced to some extent, and the phosphorus content is gradually reduced along with the increase of the content of the ferromanganese slag of the slag forming agent, so that the product quality of steel is facilitated, as shown in table 9.
TABLE 9 analysis of elemental composition of end point Steel samples in converter
The two schemes have smaller component difference from the steel slag sample of the comparative heat, have no obvious fluctuation and have no influence on the whole steelmaking system, as shown in table 10.
TABLE 10 analysis and detection results of steel slag sample
| Type(s) | P/％ | CaO/％ | FeO/％ | MgO/％ | MnO/％ | TFe/％ | SiO 2 /％ |
| Comparison | 0.778 | 37.48 | 20.57 | 12.98 | 1.01 | 25.66 | 11.27 |
| Scheme 1 | 0.760 | 37.31 | 22.67 | 12.64 | 0.89 | 25.78 | 11.69 |
| Scheme 2 | 0.646 | 37.11 | 22.28 | 13.41 | 0.88 | 25.83 | 10.59 |
According to the temperature of molten steel entering and exiting the furnace, the unit consumption of steel materials, and the component data of steel samples and steel slag samples, the novel slag former is added with ferro-manganese slag and tundish waste dry materials, so that the novel slag former has no influence on the original process, has no output of a large amount of harmful substances, can replace steelmaking dust and steelmaking sludge to produce slag formers, solves the problems of waste ferro-manganese slag generated in the titanium resource development process, waste continuous casting tundish generated in the steelmaking continuous casting production process and the like, realizes waste recycling, reduces the steelmaking dust and sludge amount, and can be used as a sinter raw material for carrying out addition.
The invention also provides a preparation method of the novel slag former for semisteel steelmaking production, as shown in figure 1. The method comprises the following steps: uniformly mixing steelmaking dust, ferro-manganese slag, waste tundish dry material, quartz sand and binder to obtain a mixture; performing ball pressing operation on the mixture to obtain balls; and drying the spherical objects to obtain the novel slag former.
The invention provides a novel slag former for semisteel steelmaking production, which comprises the following components in percentage by weight: steel-making dust, ferro-manganese slag, waste tundish dry material, quartz sand and binder. The novel slag former is added with the ferro-manganese slag and the tundish waste dry material, has no influence on the original process, does not produce a large amount of harmful substances, can replace steelmaking dust and steelmaking sludge to produce the slag former, solves the problems of waste ferro-manganese slag generated in the titanium resource development process, waste tundish generated in the steelmaking continuous casting production process and the like, realizes the aim of changing waste into valuables, reduces the steelmaking dust and sludge amount, and can be used as a sinter raw material for adding.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (10)
1. A novel slag former for semisteel steelmaking production, characterized in that the novel slag former comprises: steel-making dust, ferro-manganese slag, waste tundish dry material, quartz sand and binder.
2. The novel slag former for semisteel steelmaking production according to claim 1, wherein the mass percentages of the steelmaking dust, the ferro-manganese slag, the waste tundish dry material, the quartz sand and the binder are 25%, 10%, 50% and 5%, respectively.
3. The novel slag former for semisteel steelmaking production according to claim 1, wherein the mass percentages of the steelmaking dust, the ferro-manganese slag, the waste tundish dry material, the quartz sand and the binder are 25%, 15%, 10%, 45% and 5%, respectively.
4. The novel slag former for semisteel steelmaking as defined in claim 1 wherein said scrap tundish dry material is obtained by crushing scrap continuous casting tundish produced during steelmaking.
5. The novel slag former for semisteel steelmaking production according to claim 1, wherein said ferro-manganese slag is obtained by treating waste salts generated by titanium resource development.
6. The novel slag former for use in the production of semisteel according to claim 1, wherein the iron-manganese slag has a Fe content of about 25% to 38% and a Mn content of about 4% to 5%.
7. The novel slag former for semisteel steelmaking as defined in claim 1 or 2 wherein the main component of said scrap tundish dry material is MgO.
8. The novel slag former for semisteel steelmaking production according to claim 1, wherein said steelmaking fly ash comprises: caO, mgO, siO 2 And FeO.
9. The novel slag former for semisteel steelmaking as defined in claim 1 wherein said binder comprises: organic matter and inorganic matter, wherein, the organic matter includes: carboxymethyl cellulose, the inorganic substance includes: sodium carbonate, bentonite, silica fume, etc.
10. A method for preparing a novel slag former for semisteel steelmaking production, which is characterized by comprising the following steps:
uniformly mixing steelmaking dust, ferro-manganese slag, waste tundish dry material, quartz sand and binder according to a proportion to obtain a mixture;
performing ball pressing operation on the mixture to obtain balls;
and drying the spherical objects to obtain the novel slag former.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310385610.7A CN116463476A (en) | 2023-04-12 | 2023-04-12 | Novel slag former for semisteel steelmaking production and preparation method thereof |
Applications Claiming Priority (1)
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