CN112961959A - Oil-containing iron-containing dust mud and hot-state casting residue cooperative production and utilization method - Google Patents
Oil-containing iron-containing dust mud and hot-state casting residue cooperative production and utilization method Download PDFInfo
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- CN112961959A CN112961959A CN202110140053.3A CN202110140053A CN112961959A CN 112961959 A CN112961959 A CN 112961959A CN 202110140053 A CN202110140053 A CN 202110140053A CN 112961959 A CN112961959 A CN 112961959A
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- oil
- oily
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 166
- 239000000428 dust Substances 0.000 title claims abstract description 113
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 81
- 238000005266 casting Methods 0.000 title claims abstract description 71
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000010802 sludge Substances 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 69
- 239000010959 steel Substances 0.000 claims description 69
- 239000000463 material Substances 0.000 claims description 57
- 238000001035 drying Methods 0.000 claims description 24
- 238000007670 refining Methods 0.000 claims description 17
- 239000002893 slag Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 9
- 238000007602 hot air drying Methods 0.000 claims description 8
- 238000010079 rubber tapping Methods 0.000 claims description 8
- 239000002436 steel type Substances 0.000 claims description 8
- 239000002344 surface layer Substances 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 238000005097 cold rolling Methods 0.000 claims description 6
- 238000005098 hot rolling Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- 230000002195 synergetic effect Effects 0.000 claims 1
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 10
- 238000005272 metallurgy Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 58
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 11
- 239000002910 solid waste Substances 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000010731 rolling oil Substances 0.000 description 2
- 238000004227 thermal cracking Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0066—Preliminary conditioning of the solid carbonaceous reductant
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/008—Use of special additives or fluxing agents
-
- 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)
- Manufacturing & Machinery (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to the technical field of metallurgy, and discloses a method for cooperatively returning oil-containing and iron-containing dust and sludge and hot-state casting residue to production and utilization. The method for producing and utilizing the oily and iron-containing dust and the hot-state casting residue in a collaborative mode effectively solves the problems of harmlessness of the oily and iron-containing dust and the high-quality ferrite resource in production and utilization.
Description
Technical Field
The invention relates to the technical field of solid waste resource utilization, in particular to a method for cooperatively returning and utilizing oil-containing iron-containing dust mud and hot-state casting residue.
Background
The oil-containing and iron-containing dust mud is solid waste generated in hot rolling and cold rolling processes of iron and steel production enterprises, and comprises hot rolling oil mud, cold rolling emulsion oil mud and the like. The solid wastes contain oil substances with certain viscosity, and the problems of material adhesion of a conveying belt and the like are easily caused if the solid wastes are directly sintered and utilized, so that the production is influenced; if the smoke is easy to smoke when the smoke is directly returned to the converter, the smoke emission of the converter is influenced, and the environmental protection problem is caused.
The disposal of such solid wastes by professional companies is an effective and environmentally friendly way. At present, the common oily sludge treatment method is to carry out thermal cracking on the oily sludge so as to realize the harmlessness of the oily sludge.
The Chinese patent application (published: 11/30/2018, publication No. CN108911456A) discloses a novel method and a system for treating oily sludge, which divide the treatment of oily sludge into three thermal cracking stages, and each stage solves a specific problem of the oily sludge, so that the oily sludge can be more effectively treated and is harmless.
However, when the steel works are shipped from factories, the steel works must pay a considerable amount of disposal cost to professional companies, which results in high costs. Meanwhile, since the oily and ferrous dust and mud generated in the hot and cold rolling processes still contains a large amount of ferrite, the oily and ferrous dust and mud is a high-quality low-impurity element iron resource after oil removal, the ferrite cannot be recovered by factory disposal, and high-quality ferrite loss and resource waste are further caused. Therefore, if the oily and iron-containing dust and mud are directly returned to production, obvious economic and environmental benefits are brought to steel enterprises.
In addition, the direct return production and utilization of the thermal-state casting residue is an energy-saving consumption-reducing and solid waste resource utilization technology widely adopted by domestic steel mills in recent years. After the converter taps steel, the hot casting residue is directly poured into the ladle, so that the refining slagging material can be saved, the latent heat of the casting residue can be utilized, the iron resource in the casting residue is directly recovered, and three purposes are achieved at one stroke.
Disclosure of Invention
The invention aims to provide a method for cooperatively returning and producing and utilizing the oily and iron-containing dust and the hot-state casting residue aiming at the defects of the technology, and effectively solves the problems of harmlessness of the oily and iron-containing dust and returning and producing and utilizing high-quality ferrite resources.
In order to realize the purpose, the method for producing and utilizing the oily and iron-containing dust mud and the hot-state casting residue in a coordinated way comprises the following steps:
A) collecting oil-containing and iron-containing dust and mud, loading the oil-containing and iron-containing dust and mud into a trolley, feeding the oil-containing and iron-containing dust and mud into a hot air drying furnace, adjusting the temperature of hot air to be 105-120 ℃, and drying for 30-60 min;
B) after drying, taking out the trolley together with the dried oily and ferrous dust and mud;
C) drying the oil-containing and iron-containing dust and mud, dehydrating, then binding the oil-containing and iron-containing dust and mud to form a whole material, and manually crushing the material into 10-40 cm dust and mud materials;
D) after tapping of the steel ladle, retaining hot casting residues in the steel ladle, hoisting the steel ladle to a special station, and immediately adding 10-40 cm of dust and mud materials obtained in the step C) into the steel ladle, wherein the adding proportion is that 20-80 kg of dust and mud materials are added into each ton of casting residues;
E) after the dust and mud materials are fed, immediately covering the steel ladle to seal the steel ladle, and preserving heat for 5-25 min to obtain casting residues after reaction;
F) and opening a ladle cover, hoisting the ladle and the casting residues after reaction to a refining station, slowly pouring the steel into the surface layer of the molten steel, and finishing refining operation according to the steel type.
Preferably, in the step a), the oil-containing and iron-containing dust mud is oil-containing and iron-containing dust mud produced in a hot rolling or cold rolling process of a steel mill, the water content of the oil-containing and iron-containing dust mud is 10-30%, the oil content of the oil-containing and iron-containing dust mud is 5-10%, and the dry-based oil removal chemical composition is characterized in that: TFe is not less than 72.0%, C is not more than 2.0%, MnO is not more than 0.5%, CaO is not more than 1.0%, MgO is not more than 0.5%, SiO2≤2.0％，Al2O3≤0.5％，Na2O≤0.5％，K2Less than or equal to 0.5 percent of O, less than or equal to 0.5 percent of Cl, less than or equal to 0.2 percent of S, less than or equal to 0.1 percent of P, and the balance of O element combined with Fe element and other inevitable impurities.
Preferably, in the step B), the water content of the dried oil-containing iron-containing dust mud is less than or equal to 1.0%.
Preferably, in the step D), the temperature of the hot casting slag is 1450-1550 ℃.
Preferably, in the step D), 40-60 kg of dust and mud materials are put into each ton of casting residues.
Preferably, in the step E), the temperature of the casting residue after reaction is 1200-1350 ℃.
Preferably, in the step E), the temperature is kept for 10-15 min.
The principle of the invention is as follows:
the oil-containing and iron-containing dust mud contains a part of water, oil and iron oxide substances, rolling oil or lubricating oil used in a steel rolling process generally has a high boiling point (over 300 ℃), and mainly water in the oil is volatilized and oil is difficult to volatilize in an environment of 105-120 ℃.
The oil contains carbon as the main component, generally accounts for more than 80% of the molecular weight, is carbonized at high temperature, has reducibility, and is reduced to ferrite completely as long as the carbon content is sufficient and the iron oxide is reduced to ferrite at 1010K or more according to the equilibrium diagram of solid carbon reduced iron oxide.
Hydrogen in oil is cracked at high temperature and possibly as H2The content of oil-containing materials in the casting residue is less than 8 percent, the content of oil in the dried oil-containing materials is not more than 20 percent of the total material content, and the content of hydrogen in the oil is not more than 10 percent in general, namely the content of the hydrogen in the total material is only less than 0.16 percent. After uncovering, the total amount of hydrogen generated escapes into the air, and although it may be oxidized again to water, it is difficult to reach the explosion limit of hydrogen in the air. The invention thus relates to a method of operation without risk of explosion.
Compared with the prior art, the invention has the following advantages:
1. the oil-containing and iron-containing dust mud is produced again and the thermal-state casting residue is combined, so that the harmless treatment and production return utilization of the oil-containing and iron-containing dust mud are realized;
2. because the converter has negative pressure, the oily material is put into the converter, wherein the oil content volatilizes and carbonizes immediately to easily form black smog, enters a dust removal system along with the air draft of the converter, the converter cannot be closed or capped, and the like, and the ladle operation is more flexible, in the closed condition in the ladle, the oil content carbonizes at high temperature and then reacts with the iron oxide in the iron-containing dust mud to reduce the iron oxide into metallic iron, and then the metallic iron and the metallic iron are returned to the production together, so that the ferrite is recovered without causing pollution;
3. the operation is simple, the moisture content of the oily and iron-containing dust mud is greatly reduced after the oily and iron-containing dust mud is dried, and the oily and iron-containing dust mud is in contact with hot slag, so that the explosion risk is avoided;
4. compared with the ex-factory treatment of oily and iron-containing dust and mud, the method has obvious technical economy
Drawings
FIG. 1 is a flow chart of the method for producing and utilizing the oily and iron-containing dust and sludge and the hot casting residue in a cooperative way.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
Example one (as shown in fig. 1):
A) collecting oil-containing and iron-containing dust and mud, loading into a trolley, feeding into a hot air drying furnace, adjusting the temperature of hot air to 105 ℃, and drying for 30 min;
B) after drying, taking out the trolley together with the dried oily and ferrous dust and mud;
C) drying the oil-containing and iron-containing dust and mud, dehydrating, then binding the oil-containing and iron-containing dust and mud to form a whole material, and manually crushing the material into 10-40 cm dust and mud materials;
D) after tapping of the steel ladle, retaining hot casting residues in the steel ladle, hoisting the steel ladle to a special station, and immediately adding 10-40 cm of dust and mud materials obtained in the step C) into the steel ladle, wherein the adding proportion is that 20kg of dust and mud materials are added into each ton of casting residues;
E) after the dust and mud materials are fed, immediately covering the steel ladle to seal the steel ladle, and preserving heat for 5min to obtain casting residues after reaction;
F) and opening a ladle cover, hoisting the ladle and the casting residues after reaction to a refining station, slowly pouring the steel into the surface layer of the molten steel, and finishing refining operation according to the steel type.
Example two:
A) collecting oil-containing and iron-containing dust and mud, loading into a trolley, feeding into a hot air drying furnace, adjusting the temperature of hot air to 120 ℃, and drying for 60 min;
B) after drying, taking out the trolley together with the dried oily and ferrous dust and mud;
C) drying the oil-containing and iron-containing dust and mud, dehydrating, then binding the oil-containing and iron-containing dust and mud to form a whole material, and manually crushing the material into 10-40 cm dust and mud materials;
D) after tapping of the steel ladle, retaining hot casting residues in the steel ladle, hoisting the steel ladle to a special station, and immediately adding 10-40 cm of dust and mud materials obtained in the step C) into the steel ladle, wherein the adding proportion is that 80kg of dust and mud materials are added into each ton of casting residues;
E) after the dust and mud materials are fed, immediately covering the steel ladle to seal the steel ladle, and preserving heat for 25min to obtain casting residues after reaction;
F) and opening a ladle cover, hoisting the ladle and the casting residues after reaction to a refining station, slowly pouring the steel into the surface layer of the molten steel, and finishing refining operation according to the steel type.
Example three:
A) collecting oil-containing and iron-containing dust and mud, loading into a trolley, feeding into a hot air drying furnace, adjusting the temperature of hot air to 110 ℃, and drying for 45 min;
B) after drying, taking out the trolley together with the dried oily and ferrous dust and mud;
C) drying the oil-containing and iron-containing dust and mud, dehydrating, then binding the oil-containing and iron-containing dust and mud to form a whole material, and manually crushing the material into 10-40 cm dust and mud materials;
D) after tapping of the steel ladle, retaining hot casting residues in the steel ladle, hoisting the steel ladle to a special station, and immediately adding 10-40 cm of dust and mud materials obtained in the step C) into the steel ladle, wherein the adding proportion is that 50kg of dust and mud materials are added into each ton of casting residues;
E) after the dust and mud materials are fed, immediately covering the steel ladle to seal the steel ladle, and preserving heat for 15min to obtain casting residues after reaction;
F) and opening a ladle cover, hoisting the ladle and the casting residues after reaction to a refining station, slowly pouring the steel into the surface layer of the molten steel, and finishing refining operation according to the steel type.
Example four:
A) collecting oily and iron-containing dust and mud, loading into a trolley, feeding into a hot air drying furnace, adjusting the temperature of hot air to 110 ℃, and drying for 40 min;
B) after drying, taking out the trolley and the dried oily and ferrous dust mud, wherein the water content of the dried oily and ferrous dust mud is 1.0%;
C) drying the oil-containing and iron-containing dust and mud, dehydrating, then binding the oil-containing and iron-containing dust and mud to form a whole material, and manually crushing the material into 10-40 cm dust and mud materials;
D) after tapping of the steel ladle, retaining the thermal-state casting residue in the steel ladle, wherein the temperature of the thermal-state casting residue is 1450 ℃, hoisting the thermal-state casting residue to a special station, immediately adding 10-40 cm of dust and mud material obtained in the step C), and adding 40kg of dust and mud material into each ton of casting residue;
E) after the dust and mud materials are fed, immediately covering a steel ladle to seal the steel ladle, and preserving heat for 10min to obtain the casting residue after reaction, wherein the temperature of the casting residue after reaction is 1200 ℃;
F) and opening a ladle cover, hoisting the ladle and the casting residues after reaction to a refining station, slowly pouring the steel into the surface layer of the molten steel, and finishing refining operation according to the steel type.
Example five:
A) collecting oil-containing and iron-containing dust and mud, loading into a trolley, feeding into a hot air drying furnace, adjusting the temperature of hot air to 115 ℃, and drying for 50 min;
B) after drying, taking out the trolley and the dried oil-containing and iron-containing dust mud, wherein the water content of the dried oil-containing and iron-containing dust mud is 0.9%;
C) drying the oil-containing and iron-containing dust and mud, dehydrating, then binding the oil-containing and iron-containing dust and mud to form a whole material, and manually crushing the material into 10-40 cm dust and mud materials;
D) after tapping of the steel ladle, retaining hot casting residues in the steel ladle, wherein the temperature of the hot casting residues is 1550 ℃, hoisting the hot casting residues to a special station, immediately adding 10-40 cm of dust and mud materials obtained in the step C), and adding 60kg of dust and mud materials into each ton of casting residues;
E) after the dust and mud materials are fed, immediately covering a steel ladle to seal the steel ladle, and preserving heat for 20min to obtain the casting slag after reaction, wherein the temperature of the casting slag after reaction is 1350 ℃;
F) and opening a ladle cover, hoisting the ladle and the casting residues after reaction to a refining station, slowly pouring the steel into the surface layer of the molten steel, and finishing refining operation according to the steel type.
Example six:
A) collecting oily and iron-containing dust and mud, loading into a trolley, feeding into a hot air drying furnace, adjusting the temperature of hot air to 108 ℃, and drying for 46 min;
B) after drying, taking out the trolley and the dried oil-containing and iron-containing dust mud, wherein the water content of the dried oil-containing and iron-containing dust mud is 0.96%;
C) drying the oil-containing and iron-containing dust and mud, dehydrating, then binding the oil-containing and iron-containing dust and mud to form a whole material, and manually crushing the material into 10-40 cm dust and mud materials;
D) after tapping of the steel ladle, retaining the thermal-state casting residue in the steel ladle, wherein the temperature of the thermal-state casting residue is 1500 ℃, hoisting the thermal-state casting residue to a special station, immediately adding 10-40 cm of dust and mud material obtained in the step C), and adding 60kg of dust and mud material into each ton of casting residue;
E) after the dust and mud materials are fed, immediately covering a steel ladle to seal the steel ladle, and preserving heat for 20min to obtain casting residues after reaction, wherein the temperature of the casting residues after reaction is 1280 ℃;
F) and opening a ladle cover, hoisting the ladle and the casting residues after reaction to a refining station, slowly pouring the steel into the surface layer of the molten steel, and finishing refining operation according to the steel type.
In the first step, the second step, the oil-containing and iron-containing dust mud is produced in the hot rolling or cold rolling process of a steel mill, the water content of the oil-containing and iron-containing dust mud is 10-30%, the oil content of the oil-containing and iron-containing dust mud is 5-10%, and the dry-based oil removal chemical composition is characterized in that: TFe is not less than 72.0%, C is not more than 2.0%, MnO is not more than 0.5%, CaO is not more than 1.0%, MgO is not more than 0.5%, SiO2≤2.0％，Al2O3≤0.5％，Na2O≤0.5％，K2Less than or equal to 0.5 percent of O, less than or equal to 0.5 percent of Cl, less than or equal to 0.2 percent of S, less than or equal to 0.1 percent of P, and the balance of O element combined with Fe element and other inevitable impurities.
The method for producing and utilizing the oily and iron-containing dust mud and the hot-state casting residue in a collaborative returning mode utilizes the latent heat of the hot-state casting residue to promote reductive organic matters in the oily and iron-containing dust mud to react with iron oxide under a closed condition, so that harmless digestion and ferrite reduction of oil are realized, and then the casting residue and the oily and iron-containing dust mud are returned to production and utilization together, so that the high-quality ferrite resource of steel enterprises is recycled, and the method has good technical and economic properties.
Claims (7)
1. A method for producing and utilizing oily and iron-containing dust and sludge and hot-state casting residue in a synergic manner is characterized by comprising the following steps: the method comprises the following steps:
A) collecting oil-containing and iron-containing dust and mud, loading the oil-containing and iron-containing dust and mud into a trolley, feeding the oil-containing and iron-containing dust and mud into a hot air drying furnace, adjusting the temperature of hot air to be 105-120 ℃, and drying for 30-60 min;
B) after drying, taking out the trolley together with the dried oily and ferrous dust and mud;
C) drying the oil-containing and iron-containing dust and mud, dehydrating, then binding the oil-containing and iron-containing dust and mud to form a whole material, and manually crushing the material into 10-40 cm dust and mud materials;
D) after tapping of the steel ladle, retaining hot casting residues in the steel ladle, hoisting the steel ladle to a special station, and immediately adding 10-40 cm of dust and mud materials obtained in the step C) into the steel ladle, wherein the adding proportion is that 20-80 kg of dust and mud materials are added into each ton of casting residues;
E) after the dust and mud materials are fed, immediately covering the steel ladle to seal the steel ladle, and preserving heat for 5-25 min to obtain casting residues after reaction;
F) and opening a ladle cover, hoisting the ladle and the casting residues after reaction to a refining station, slowly pouring the steel into the surface layer of the molten steel, and finishing refining operation according to the steel type.
2. The method for producing and utilizing the oily and iron-containing sludge and the hot casting slag in a coordinated manner as claimed in claim 1, wherein the method comprises the following steps: in the step A), the oily and iron-containing dust mud is oily and iron-containing dust mud generated in a hot rolling or cold rolling process of a steel mill, the moisture content of the oily and iron-containing dust mud is 10-30%, the oil content of the oily and iron-containing dust mud is 5-10%, and the dry-based oil removal chemical composition is characterized in that: TFe is not less than 72.0%, C is not more than 2.0%, MnO is not more than 0.5%, CaO is not more than 1.0%, MgO is not more than 0.5%, SiO2≤2.0％，Al2O3≤0.5％，Na2O≤0.5％，K2Less than or equal to 0.5 percent of O, less than or equal to 0.5 percent of Cl, less than or equal to 0.2 percent of S, less than or equal to 0.1 percent of P, and the balance of O element combined with Fe element and other inevitable impurities.
3. The method for producing and utilizing the oily and iron-containing sludge and the hot casting slag in a coordinated manner as claimed in claim 1, wherein the method comprises the following steps: in the step B), the water content of the dried oil-containing and iron-containing dust mud is less than or equal to 1.0%.
4. The method for producing and utilizing the oily and iron-containing sludge and the hot casting slag in a coordinated manner as claimed in claim 1, wherein the method comprises the following steps: in the step D), the temperature of the hot casting residue is 1450-1550 ℃.
5. The method for producing and utilizing the oily and iron-containing sludge and the hot casting slag in a coordinated manner as claimed in claim 1, wherein the method comprises the following steps: in the step D), 40-60 kg of dust and mud materials are put into each ton of casting residues.
6. The method for producing and utilizing the oily and iron-containing sludge and the hot casting slag in a coordinated manner as claimed in claim 1, wherein the method comprises the following steps: in the step E), the temperature of the casting residue after reaction is 1200-1350 ℃.
7. The method for producing and utilizing the oily and iron-containing sludge and the hot casting slag in a coordinated manner as claimed in claim 1, wherein the method comprises the following steps: and in the step E), preserving the heat for 10-15 min.
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| CN202110140053.3A CN112961959A (en) | 2021-02-01 | 2021-02-01 | Oil-containing iron-containing dust mud and hot-state casting residue cooperative production and utilization method |
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| CN202110140053.3A CN112961959A (en) | 2021-02-01 | 2021-02-01 | Oil-containing iron-containing dust mud and hot-state casting residue cooperative production and utilization method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014162976A (en) * | 2013-02-27 | 2014-09-08 | Jfe Steel Corp | Method of treating molten iron preliminarily |
| CN105347643A (en) * | 2015-12-13 | 2016-02-24 | 宝钢集团新疆八一钢铁有限公司 | Technology for treating steel-rolling oily sludge by means of steel slag waste heat |
| CN105695735A (en) * | 2015-11-26 | 2016-06-22 | 新疆八钢铁股份有限公司 | Self-reduction utilization process for steel rolling oily sludge and blast furnace gas dust |
-
2021
- 2021-02-01 CN CN202110140053.3A patent/CN112961959A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014162976A (en) * | 2013-02-27 | 2014-09-08 | Jfe Steel Corp | Method of treating molten iron preliminarily |
| CN105695735A (en) * | 2015-11-26 | 2016-06-22 | 新疆八钢铁股份有限公司 | Self-reduction utilization process for steel rolling oily sludge and blast furnace gas dust |
| CN105347643A (en) * | 2015-12-13 | 2016-02-24 | 宝钢集团新疆八一钢铁有限公司 | Technology for treating steel-rolling oily sludge by means of steel slag waste heat |
Non-Patent Citations (2)
| Title |
|---|
| 李永谦等: "热态铸余渣返生产可行性分析", 《宝钢技术》 * |
| 赵旭章等: "回收利用轧钢含油污泥的工艺实践", 《新疆钢铁》 * |
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