A method of inhibiting or eliminating a ladle bond

Abstract

The application relates to a method for inhibiting or eliminating the adhesion of molten iron ladle, belonging to the technical field of steel metallurgy, comprehensive utilization of metallurgical resources and smelting slag metallurgy. The method for inhibiting the adhesion of molten iron ladle is that an oxidizing substance is added into molten iron in a molten iron channel or a molten iron ladle, low-valence titanium oxide in the molten iron is oxidized, the melting temperature of the system is reduced, the molten iron is kept in a molten state and distributed on the surface of the molten iron; the method for eliminating the adhesion of molten iron ladle is that molten blast furnace slag, electric furnace melting separation slag and molten reduction slag are poured into the molten iron ladle with adhesion, an oxidizing atmosphere is introduced, the adhesion in the molten iron ladle is gradually dissolved and enters the molten blast furnace slag, the electric furnace melting separation slag and the molten reduction slag, and the entrained metal iron in the adhesion and the metal iron in the molten blast furnace slag containing titanium are settled at the bottom.

Description

Technical Field

[0001] This invention belongs to the fields of iron and steel metallurgy, comprehensive utilization of metallurgical resources and slag metallurgy, and specifically relates to a method for inhibiting or eliminating adhesions in molten iron ladles. Background Technology

[0002] In steel production, to extend the lifespan of blast furnaces (averaging over 14 years) and protect the furnace lining, titanium-containing materials are added during blast furnace production. Some steel companies add low-titanium iron ore to their blast furnace feedstock to reduce costs and lower the proportion of imported iron ore. Many steel companies use blast furnace processes to process vanadium-titanium magnetite, obtaining products such as vanadium-containing molten iron, titanium-containing blast furnace slag, and vanadium slag.

[0003] However, when the titanium dioxide load is ≥5kg / ton of pig iron, the slag viscosity increases, the slag-metal separation is poor, the blast furnace operation is not smooth, and the molten iron ladle sticks severely, making it impossible to achieve "one-ladle" production.

[0004] In modern steel production, the "one-ladle system" steelmaking can reduce the number of times molten iron ladles are transported, increase the safety factor, reduce the number of molten iron ladles, extend the life of molten iron ladles, reduce the consumption of refractory materials, lower costs, reduce the number of times molten iron ladles need to be built, and improve working conditions.

[0005] However, due to the titanium dioxide load in the furnace charge being ≥5kg / ton of pig iron, the molten iron ladle is severely stuck, making it impossible to adopt the "one-ladle system". This reduces the lifespan of the molten iron ladle, increases the consumption of refractory materials, raises costs, requires more molten iron ladle transportation, reduces on-site safety, requires a large amount of molten iron ladle, requires more molten iron ladle construction, and results in poor working conditions.

[0006] The adhesive material in molten iron ladles is mainly low-priced titanium oxide, with some metallic iron mixed in. This adhesive has high viscosity and a high melting temperature, easily forming a solid phase and creating a refractory adhesive. The problem of molten iron ladles sticking to the ladle can also occur during the production of nickel-iron or ferrochrome alloys. Summary of the Invention

[0007] To address the severe problem of molten iron sticking to the ladle, this invention provides a method for inhibiting or eliminating sticking material in the molten iron ladle. The method for inhibiting sticking material involves adding an oxidizing substance to the molten iron in the trough or ladle to oxidize the low-valence titanium oxides in the molten iron, lowering the melting temperature of the system and keeping it in a molten state, thus distributing it on the surface of the molten iron. The method for eliminating sticking material involves pouring molten blast furnace slag, electric furnace slag, and molten reducing slag into the ladle containing the sticking material, introducing an oxidizing atmosphere, causing the sticking material in the ladle to gradually melt and enter the molten blast furnace slag, electric furnace slag, and molten reducing slag. The metallic iron entrained in the sticking material and the metallic iron mixed in the titanium-containing blast furnace slag settle to the bottom.

[0008] The present invention provides a method for inhibiting or eliminating adhesions in molten iron ladles, comprising the following two methods:

[0009] Method A: A method for inhibiting adhesion of substances to molten iron ladles, the steps of which are as follows:

[0010] (A-1) Add binder inhibitor to one or more of the following situations: molten iron in a molten iron trough, molten iron in a molten iron ladle, or empty molten iron ladle (to which molten iron is later poured in).

[0011] (A-2) The binder inhibitor works in two ways: Method 1: Under the high temperature of molten iron, the binder inhibitor can first oxidize the low-valence titanium in the binder to high-valence titanium oxide. The high-valence titanium oxide gradually melts with the binder inhibitor and the binder after the reaction, entering or forming a low melting temperature slag; Method 2: Under the high temperature of molten iron, the binder inhibitor directly reacts with the binder to form a slag-forming reaction, gradually melting and entering or forming a low melting temperature slag. However, during the reaction, the low-valence titanium in the binder does not undergo oxidation.

[0012] (A-3) During the process of the binder being suppressed or melted, metallic iron entrained in the binder enters the molten iron.

[0013] Furthermore, in step (A-1) of method A, the binder inhibitor is one or both of oxidizing substances and slag-forming agents;

[0014] Furthermore, the oxidizing substance is:

[0015] (a) One or two of iron oxides (>+2 valence), or a mixture of one or more minerals containing iron oxides (>2 valence); preferably: a mixture of one or more of Fe3O4, Fe2O3, magnetite concentrate or hematite concentrate, and the mass content of Fe3O4 and Fe2O3 in magnetite concentrate and hematite concentrate needs to be ≥30%; or;

[0016] (b) One or both of the oxides of chromium (+6 valence) or manganese (≥+4 valence), or a mixture of one or more of the minerals containing oxides of chromium (+6 valence) or manganese (≥+4 valence); or;

[0017] (c) A mixture of one or more of the following slags containing oxides of iron (>+2 valence), chromium (+6 valence), or manganese (≥+4 valence): preferably a mixture of one or more of the following slags containing Fe2O3 and Fe3O4: the slag being a mixture of one or more of the following heavy metal pyrometallurgical slags: copper, lead, zinc, nickel, tin, and steel slag.

[0018] Furthermore, the slag-forming agent is:

[0019] (aa)FeO; or;

[0020] (bb) One or more of CaO, Al2O3, FeO, MnO, and MgO are mixed and used with SiO2; or;

[0021] (cc) A mixture of one or more of the following: copper, lead, nickel, zinc, tin heavy metal pyrometallurgical slag and ordinary blast furnace slag; wherein the ordinary blast furnace slag is in a molten or cold state; wherein the mass content of TiO2 in the ordinary blast furnace slag is ≤3%;

[0022] Furthermore, the selection and application method of the adhesive inhibitor in step (A-1) of method A is as follows:

[0023] i. When the binder contains low-valent titanium:

[0024] (1.1) Oxidizing agent (a) can be used alone or in combination with slagging agent. The ways of using it in combination with slagging agent include: ① in combination with slagging agent (aa); ② in combination with slagging agent (bb); ③ in combination with ordinary blast furnace slag in slagging agent (cc); ④ in combination with slagging agent (aa) and slagging agent (bb); ⑤ in combination with slagging agent (aa) and ordinary blast furnace slag in slagging agent (cc); ⑥ in combination with slagging agent (bb) and ordinary blast furnace slag in slagging agent (cc); ⑦ in combination with slagging agent (aa), slagging agent (bb) and ordinary blast furnace slag in slagging agent (cc); When slagging agent (bb) is used in combination with oxidizing agent, SiO2 can be used alone as a slagging agent in combination with oxidizing agent.

[0025] When oxidizing substances (a) are used alone or in combination with slag-forming agents, the addition amount of each substance is limited as follows: the mass of iron oxide (>+2 valence) added per ton of molten iron is 0.3 kg to 3 kg.

[0026] (1.2) Oxidizing substances (b) cannot be used alone and need to be used in combination with slagging agents. The ways to use them in combination with slagging agents include: ① mixing with slagging agent (aa); ② mixing with slagging agent (bb); ③ mixing with ordinary blast furnace slag in slagging agent (cc); ④ mixing with slagging agent (aa) and slagging agent (bb); ⑤ mixing with ordinary blast furnace slag in slagging agent (aa) and slagging agent (cc); ⑥ mixing with ordinary blast furnace slag in slagging agent (bb) and slagging agent (cc); ⑦ mixing with ordinary blast furnace slag in slagging agent (aa), slagging agent (bb), and slagging agent (cc).

[0027] The limits for the amount of each substance added are as follows: based on the oxides of chromium (+6 valence) and / or manganese (≥+4 valence) contained in the mixture, the oxides of chromium (+6 valence) and / or manganese (≥+4 valence) contained in the mixture account for 5% to 15% of the total mass of the mixture, and the mass of oxides of chromium (+6 valence) and / or manganese (≥+4 valence) added per ton of molten iron is 0.3 kg to 3.0 kg.

[0028] (1.3) When oxidizing substance (c) is used alone, the addition amount is limited to 0.3 kg to 6 kg of oxidizing substance (c) per ton of molten iron.

[0029] (1.4) Oxidizing substance (a), oxidizing substance (b) and slagging agent are used in combination, or oxidizing substance (a) is used in combination with oxidizing substance (b). The methods of use include: ① using with slagging agent (aa); ② using with slagging agent (bb); ③ using with ordinary blast furnace slag in slagging agent (cc); ④ using with slagging agent (aa) and slagging agent (bb); ⑤ using with ordinary blast furnace slag in slagging agent (aa) and slagging agent (cc); ⑥ using with ordinary blast furnace slag in slagging agent (bb) and slagging agent (cc); ⑦ using with ordinary blast furnace slag in slagging agent (aa), slagging agent (bb) and slagging agent (cc); ⑧ using oxidizing substance (a) and oxidizing substance (b).

[0030] The limiting conditions for the proportion of each substance in the mixture are: the mass percentage of oxides containing iron (>+2 valence), chromium (+6 valence) and / or manganese (≥+4 valence) in the mixture is ≥5%, and the mass percentage of oxides containing chromium (+6 valence) and / or manganese (≥+4 valence) in the mixture is ≤15%.

[0031] The addition of the mixture is limited under the following conditions: provided that the proportions of each substance in the mixture are met, the mass of oxides containing iron (>+2 valence) and chromium (+6 valence) and / or manganese (≥+4 valence) added per ton of molten iron is 0.3 kg to 3.0 kg.

[0032] ii. When the adhesive does not contain low-valence titanium substances

[0033] (2.1) Slag-forming agent (aa) is used alone. The addition amount is limited to 0.3 kg to 3 kg of slag-forming agent (aa) per ton of molten iron.

[0034] (2.2) Slag-forming agent (bb) is used alone. The addition amount is limited to 0.3 kg to 3 kg of slag-forming agent (bb) per ton of molten iron.

[0035] (2.3) Slag-forming agent (cc) is used alone. The addition amount is limited to 0.3 kg to 6 kg per ton of molten iron.

[0036] (2.3) When slag-forming agent (aa) and slag-forming agent (bb) are used in combination, the following conditions apply: the mass of the mixture of slag-forming agent (aa) and slag-forming agent (bb) added per ton of molten iron is 0.3 kg to 3 kg.

[0037] (2.4) Slag-forming agent (aa) and slag-forming agent (cc) are used in combination. The addition amount is limited to 0.3 kg to 3 kg per ton of molten iron.

[0038] (2.5) When slag-forming agent (bb) and slag-forming agent (cc) are used in combination, the following conditions apply: the mass of the mixture of slag-forming agent (bb) and slag-forming agent (cc) added per ton of molten iron is 0.3 kg to 3 kg.

[0039] (2.6) Slag-forming agent (aa), slag-forming agent (bb) and slag-forming agent (cc) are used in combination. The addition amount is limited to 0.3 kg to 3 kg per ton of molten iron.

[0040] Table 1. Chemical composition (%) of heavy metal pyrometallurgical slag (copper smelting slag)

[0041] FeO <![CDATA[Fe3O4]]> <![CDATA[SiO2]]> Other components 30.00～60.00 8.00～40.00 20.00～40.00 3.00～10.00

[0042] Table 2 Chemical composition of heavy metal pyrometallurgical slag (nickel smelting slag)

[0043] FeO <![CDATA[Fe3O4]]> <![CDATA[SiO2]]> Other components 25～50.00 6.00～25.00 28.00～40.00 6～12.00

[0044] Table 3 Chemical composition of heavy metal pyrometallurgical slag (lead smelting slag)

[0045] FeO <![CDATA[Fe3O4]]> <![CDATA[SiO2]]> Other components 25.00～50.00 6.00～25.00 15.00～40.00 8.00～20.00

[0046] Table 4 Chemical composition of heavy metal pyrometallurgical slag (tin smelting slag)

[0047] FeO <![CDATA[Fe3O4]]> <![CDATA[SiO2]]> Other components 25.00～50.00 6.00～25.00 15.00～42.00 3.00～18.00

[0048] Table 5 Chemical composition of heavy metal pyrometallurgical slag (zinc smelting slag)

[0049] FeO <![CDATA[Fe3O4]]> <![CDATA[SiO2]]> Other components 20.00～50.00 6.00～30.00 7.00～40.00 3.00～18.00

[0050] Table 6 Chemical composition of ordinary blast furnace slag

[0051] CaO <![CDATA[SiO2]]> MgO <![CDATA[Al2O3]]> Other components 35.00～46.00 33.00～45.00 4.00～10.00 4.00～16.00 3.00～7.00

[0052] Table 7 Chemical composition of steel slag

[0053] CaO <![CDATA[SiO2]]> MgO <![CDATA[Fe2O3]]> Other components 35.00～60.00 2.00～15.00 1.00～5.00 8.00～25.00 8.00～20.00

[0054] Furthermore, the adhesive inhibitor in step (A-1) of method A also has the function of eliminating adhesives; the elimination of adhesives is achieved by repeating the process of step (A-1) and step (A-2) until the adhesives that have been formed disappear, with the number of cycles being 20-500.

[0055] Furthermore, in step (A-1) of method A, the method of adding the binder inhibitor is as follows: directly adding the binder inhibitor to the molten iron during the pouring process, and / or, adding the binder inhibitor to the bottom of an empty molten iron ladle before pouring in the molten iron, and / or, spraying the binder inhibitor around the empty molten iron ladle; the empty molten iron ladle is a molten iron ladle that has been baked or poured out of the molten iron, and the temperature of the empty molten iron ladle is ≥700℃; the temperature of the molten iron in the molten iron ladle is ≥1300℃.

[0056] Furthermore, in step (A-2) of method A, the melting temperature of the low melting temperature slag is ≤1350℃; the main crystalline phase in the formed low melting temperature slag is one or two of the following: olivine structure, ordinary blast furnace slag structure, and FeO, but does not include magnesium olivine and calcium magnesium olivine structures; the main crystalline phase in the ordinary blast furnace slag is feldspar; and the TiO2 mass content in the ordinary blast furnace slag is ≤3%.

[0057] Method B: A method for removing adhering substances from molten iron ladles, the steps of which are as follows:

[0058] (B-1) Pour one or more of the following slags into an empty ladle containing adhesive material: molten blast furnace slag, electric furnace molten iron slag, molten reduction iron slag, and ferroalloy slag; and then introduce gas to agitate the ladle.

[0059] (B-2) The binder in the molten iron ladle gradually melts and enters one or more of the following slag mixtures: molten blast furnace slag, electric furnace molten slag, molten reduction slag, and ferroalloy slag, and carries metallic iron to the bottom.

[0060] Steps (B-1) and (B-2) are repeated multiple times to remove the adhesive residue from the molten iron ladle, with the number of cycles being 2-5.

[0061] Furthermore, in step B (B-1) of the method, the molten blast furnace slag is one or both of ordinary blast furnace slag and titanium-containing blast furnace slag; the TiO2 mass content in the ordinary blast furnace slag is ≤3%, and the TiO2 mass content in the titanium-containing blast furnace slag is >3%; the temperature of the molten blast furnace slag, electric furnace smelting slag, molten reduction smelting slag, and ferroalloy slag is ≥1280℃, and when the slag temperature is <1280℃, it is heated by an electric furnace; the molten blast furnace slag, electric furnace smelting slag, molten reduction smelting slag, and ferroalloy slag are directly derived from the blast furnace, electric furnace, and molten reduction furnace smelting processes.

[0062] Furthermore, in step (B-1) of method B, the gas is one or more of an oxidizing gas, nitrogen, and argon; the oxidizing gas is one or more of oxygen, air, and oxygen-enriched air; when the binder in step (B-1) contains low-valent titanium, an oxidizing gas is used, or one or more of nitrogen and argon are mixed with the oxidizing gas; when the binder in step (B-1) does not contain low-valent titanium, one or more of an oxidizing gas, nitrogen, and argon are used.

[0063] The principle of this invention:

[0064] In method A, option one:

[0065] When the binder contains low-valent titanium, the binder has a high melting temperature and is difficult to dissolve. Adding an oxidized substance oxidizes the low-valent titanium to high-valent titanium, thus decreasing the melting temperature and viscosity of the system: (Ti 2+ Ti 3+ )+(Fe 3+ )=(Ti 4+ )+(Fe 2+ As the melting temperature of the binder decreases, the binder reacts with the inhibitor to form a slag with a low melting temperature, thus achieving melting.

[0066] Adding heavy metal smelting slag with a low melting temperature (containing Fe3O4, olivine structure) not only oxidizes low-valent titanium to high-valent titanium, but also, the heavy metal smelting slag with a low melting temperature or slag-forming agents containing SiO2 causes the binder to form slag (2FeO-SiO2, FeO-CaO-SiO2, FeO-CaO-Al2O3-SiO2, 2FeO-SiO2, MgO-CaO-Al2O3-SiO2, etc.), forming a low melting temperature system (≤1350℃), such as an olivine structure, or a structure similar to ordinary blast furnace slag.

[0067] When oxidizing substances (Fe > +2 valence) react with low-valence titanium, the resulting FeO has a low melting point and can lower the melting temperature of the slag system. It can also react with binders to dissolve them, thus facilitating the dissolution of the binders.

[0068] In method two of method A:

[0069] Without the presence of low-valent titanium in the binder, no oxidant is needed. The slag-forming agent and binder react to form a slag system that reaches a low melting temperature (olivine structure or ordinary blast furnace slag structure, 2FeO-SiO2, FeO-CaO-SiO2, FeO-CaO-Al2O3-SiO2, 2FeO-SiO2, MgO-CaO-Al2O3-SiO2, etc.), including heavy metal smelting slag with fir olivine structure and ordinary blast furnace slag, etc. The binder is suppressed or melted away.

[0070] When low-priced titanium is present in the binder, the addition of a slag-forming agent and an oxidant is beneficial to the dissolution of the binder, and its dissolution effect is better than that of adding an oxidant alone.

[0071] In both methods of method A, the inhibitors act in the following ways:

[0072] The binder is composed of oxides and metallic iron. The inhibitor reacts only with the oxides of the binder to form a low melting temperature slag system. The oxides in the binder are gradually eroded, that is, the binder skeleton is destroyed, the binder becomes loose and broken, which is conducive to removal.

[0073] In method B, the binder contains low-valent titanium:

[0074] Taking advantage of the high and low melting temperatures of metallurgical slag discharge, under gas oxidation and agitation conditions, low-valence titanium is oxidized to high-valence titanium, the melting temperature of the binder decreases, and the oxides in the binder gradually melt into the high physical heat blast furnace slag, electric furnace smelting ironmaking slag, molten reduction ironmaking slag, and ferroalloy slag, thus dissolving the binder.

[0075] In method B, under the condition that no low-valent titanium is present in the binder:

[0076] Taking advantage of the high discharge temperature and low melting temperature of metallurgical slag, under gas agitation conditions, the binder gradually melts into the blast furnace slag with high physical heat, the electric furnace smelting ironmaking slag, the molten reduction ironmaking slag, and the ferroalloy slag, and finally the binder melts.

[0077] In methods A and B:

[0078] As the oxides in the binder gradually dissolve, the pig iron in the binder also dissolves and enters the molten pig iron.

[0079] Advantages and beneficial effects of the present invention:

[0080] (1) The raw materials and process costs are low, no equipment investment is required, and the physical heat of the molten slag can be directly utilized without heating.

[0081] (2) The low cost, short process, low energy consumption and low melting temperature of the inhibitor are features of the present invention, which inhibit or eliminate the adhesive with the fewest steps.

[0082] (3) The ability to recover iron inclusions in the binder is a feature of this invention.

[0083] (4) Oxidizing substances (Fe2O3, Fe3O4) are reduced to reducing substances (FeO), slag-forming agents and binders form slag, forming low melting temperature slag, which is distributed on the surface of molten iron to protect the temperature of molten iron and prevent molten iron from oxidizing, thus replacing the heat-insulating rice husk. Detailed Implementation

[0084] i. When the binder contains low-valent titanium:

[0085] Example 1 (Method A, Approach 1, Oxidizing Substance (a))

[0086] Magnetite concentrate (Fe3O4 content 30%) is added to molten iron in a ladle (molten iron temperature 1300℃, empty ladle temperature 700℃). The amount of magnetite concentrate added is 3.0 kg / ton of molten iron, based on the Fe3O4 content in the magnetite concentrate. Fe3O4 oxidizes low-valence titanium in the molten iron to high-valence titanium, and Fe3O4 is reduced to FeO. The low melting temperature FeO forms a low melting temperature slag with the binder, inhibiting the formation of the binder. The low melting temperature slag has a melting temperature of 1280℃ and covers the surface of the molten iron, playing a heat-insulating role. At the same time, metallic iron in the binder enters the molten iron.

[0087] Comparative Example 1

[0088] Other conditions were the same as in Example 1. The temperature of the molten iron in the ladle was 1290°C, which was too low to allow the oxidant and binder to dissolve.

[0089] Comparative Example 2

[0090] Other conditions were the same as in Example 1, except that the amount of magnetite concentrate added was 3.1 kg per ton of molten iron, and the oxidant...

[0091] High addition amounts result in an excess of magnetite, leading to a high melting temperature and inhibiting the melting of the binder.

[0092] Comparative Example 3

[0093] Other conditions are the same as in Example 1. Magnetite concentrate (Fe3O4 content is 29%). The low Fe3O4 content cannot completely oxidize the low-valence titanium in the binder, and the high melting temperature inhibits the melting of the binder.

[0094] Comparative Example 4

[0095] Other conditions were the same as in Example 1, but no magnetite was added, which prevented the oxidation of low-valence titanium in the binder and increased the amount of binder.

[0096] Example 2 (Method A, Method 1, Oxidizing Substance (a))

[0097] Fe2O3 is added to molten iron in a ladle (molten iron temperature 1300℃, empty ladle temperature 700℃). The mass of Fe2O3 added per ton of molten iron is 0.3 kg. Fe2O3 oxidizes the low-valence titanium in the molten iron to high-valence titanium, and then gradually reduces Fe2O3 to FeO. The low-melting-temperature FeO forms a low-melting-temperature slag with the binder, inhibiting the formation of the binder. This low-melting-temperature slag, with a melting temperature of 1270℃, covers the surface of the molten iron, providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0098] Comparative Example 5

[0099] Other conditions were the same as in Example 2, with Fe2O3 at 0.2 kg / ton of molten iron, which could not oxidize the low-valence titanium in the binder, resulting in a high melting temperature and inhibiting the melting of the binder.

[0100] Example 3 (Method A, Method 1, Oxidizing substance (a) + Slag-forming agent (aa))

[0101] A mixture of magnetite concentrate (Fe3O4 content 30%) and slagging agent FeO (Fe3O4 content 20%) is added to molten iron in a ladle (molten iron temperature 1300℃, empty ladle temperature 700℃). The amount of Fe3O4 added is 3.0 kg per ton of molten iron. Fe3O4 oxidizes low-valence titanium in the molten iron to high-valence titanium, and Fe3O4 is reduced to FeO. The low melting temperature FeO forms a low melting temperature slag with the binder, inhibiting the formation of the binder. The low melting temperature slag has a melting temperature of 1260℃ and covers the surface of the molten iron, playing a heat-preserving role. At the same time, metallic iron in the binder enters the molten iron.

[0102] Example 4 (Method A, Option 1, Oxidizing substance (a) + Slag-forming agent (aa))

[0103] A mixture of Fe3O4 and FeO (containing 20% ​​Fe3O4) is added to molten iron in a ladle (molten iron temperature 1300℃, empty ladle temperature 700℃). The amount of Fe3O4 added is 0.3 kg per ton of molten iron. Fe3O4 oxidizes low-valence titanium in the molten iron to high-valence titanium, and Fe3O4 is reduced to FeO. The low-melting-temperature FeO forms a low-melting-temperature slag with the binder, inhibiting the formation of the binder. The low-melting-temperature slag has a melting temperature of 1250℃ and covers the surface of the molten iron, providing insulation. At the same time, metallic iron from the binder enters the molten iron.

[0104] Example 5 (Method A, Scheme 1, Oxidizing substance (a) + Slag-forming agent (bb))

[0105] A mixture of Fe3O4 and SiO2 (with a FeO to SiO2 molar ratio of 2:1) is added to the molten iron in the ladle (molten iron temperature is 1320℃, empty ladle temperature is 730℃). The amount of mixture added is calculated based on the Fe3O4 content, with 0.3 kg of Fe3O4 added per ton of molten iron mixture. Fe3O4 oxidizes the low-valence titanium in the molten iron to high-valence titanium, reducing Fe3O4 to FeO, which reacts with SiO2 to form a low-melting-temperature slag of the fir olivine type. The binder enters the low-melting-temperature slag, inhibiting its formation. The slag has a melting temperature of 1240℃ and covers the surface of the molten iron, providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0106] Comparative Example 6

[0107] Other conditions were the same as in Example 5, but Fe3O4 was not added. The low-valence titanium in the binder was not oxidized, resulting in a high melting temperature. At the same time, no low-melting-temperature slag was formed, which could not inhibit melting.

[0108] Example 6 (Method A, Scheme 1, Oxidizing substance (a) + Slag-forming agent (bb))

[0109] A mixture of Fe3O4, CaO, Al2O3, MgO, and SiO2 (Fe3O4 mass fraction 6%, CaO / SiO2 ratio 1.1, Al2O3 7%, MgO 6%) is added to the molten iron in the ladle (molten iron temperature 1320℃, empty ladle temperature 700℃). The amount of mixture added is based on the Fe3O4 content, with 1.8 kg of Fe3O4 added per ton of molten iron. Fe3O4 oxidizes low-valence titanium in the molten iron to high-valence titanium, reducing Fe3O4 to FeO. FeO then reacts with CaO, Al2O3, MgO, and SiO2 to form a low-melting-temperature slag, typical of blast furnace slag. The binder enters the low-melting-temperature slag, inhibiting its formation. The slag has a melting temperature of 1270℃ and covers the surface of the molten iron, providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0110] Example 7 (Method A, Scheme 1, Oxidizing substance (a) + Slagging agent (cc))

[0111] A mixture of Fe3O4 and ordinary blast furnace slag (Fe3O4 mass fraction 6%, CaO / SiO2 1.1%, Al2O3 5%, MgO 5%, other components 3%) is added to the molten iron in the ladle (molten iron temperature 1320℃, empty ladle temperature 700℃). Based on the Fe3O4 in the mixture, 2.3 kg of Fe3O4 is added per ton of molten iron. Fe3O4 oxidizes the low-valence titanium in the molten iron to high-valence titanium, reducing Fe3O4 to FeO. This FeO reacts with the ordinary blast furnace slag to form a low-melting-temperature slag of ordinary blast furnace slag type. The inclusion of binders in the low-melting-temperature slag inhibits binder formation. The slag has a melting temperature of 1240℃ and covers the surface of the molten iron, simultaneously providing insulation.

[0112] Example 8 (Method A, Scheme 1, Oxidizing substance (a) + Slag-forming agent (aa) + Slag-forming agent (bb))

[0113] A mixture of Fe3O4, FeO, CaO, Al2O3, MgO, and SiO2 (6% Fe3O4, 1.1 CaO / SiO2 ratio, 7% Al2O3, 6% MgO, and 1% FeO) is added to the molten iron in the ladle (molten iron temperature is 1320℃, empty ladle temperature is 700℃). The amount of mixture added is based on the Fe3O4 content, with 1.9 kg of Fe3O4 added per ton of molten iron. Fe3O4 oxidizes low-valence titanium in the molten iron to high-valence titanium, reducing Fe3O4 to FeO. FeO then reacts with CaO, Al2O3, MgO, and SiO2 to form a low-melting-temperature slag, typical of blast furnace slag. The binder enters the low-melting-temperature slag, inhibiting its formation. The slag has a melting temperature of 1260℃ and covers the surface of the molten iron, providing insulation. Metallic iron from the binder is incorporated into the molten iron.

[0114] Example 9 (Method A, Scheme 1, Oxidizing substance (a) + Slag-forming agent (aa) + Slag-forming agent (cc))

[0115] A mixture of Fe3O4, FeO, and ordinary blast furnace slag (6% Fe3O4, 1% FeO, 1.1% CaO / SiO2, 5% Al2O3, 5% MgO, and 3% others) is added to the molten iron in the ladle (molten iron temperature is 1320℃, empty ladle temperature is 700℃). The amount of mixture added is based on the Fe3O4 content, at 2.1 kg / ton of molten iron. Fe3O4 oxidizes the low-valence titanium in the molten iron to high-valence titanium, and Fe3O4 is reduced to FeO. It reacts with ordinary blast furnace slag to form a low melting temperature slag of ordinary blast furnace slag type. The binder enters the low melting temperature slag, inhibiting the formation of binders. The melting temperature of the slag is 1240℃, covering the surface of the molten iron and playing a heat-preserving role. At the same time, metallic iron in the binder enters the molten iron.

[0116] Example 10 (Method A, Scheme 1, Oxidizing substance (a) + Slag-forming agent (aa) + Slag-forming agent (bb) + Slag-forming agent (cc))

[0117] Add a mixture of Fe3O4, FeO, SiO2, Al2O3, and ordinary blast furnace slag (Fe3O4 6%, FeO 1%, SiO2 1%, Al2O3 1%, ordinary blast furnace slag 91% (CaO / SiO2 1.1, Al2O3 4%, MgO 5%, others 4%) to the molten iron in the ladle (molten iron temperature 1320℃, empty ladle temperature 700℃). The amount of mixture added is based on the proportion of Fe3O4, FeO, SiO2, Al2O3, Al2O3, Al2O3, and MgO in the mixture. Based on Fe3O4, 2.1 kg of Fe3O4 is added per ton of molten iron. Fe3O4 oxidizes low-valence titanium in the molten iron to high-valence titanium, while Fe3O4 is reduced to FeO. This FeO reacts with ordinary blast furnace slag to form a low-melting-temperature slag of the ordinary blast furnace slag type. The binder enters the low-melting-temperature slag, inhibiting the formation of binders. The slag has a melting temperature of 1240℃ and covers the surface of the molten iron, playing a heat-insulating role. At the same time, metallic iron in the binder enters the molten iron.

[0118] Example 11 (Method A, Option 1, Oxidizing substance (b) + Slag-forming agent (aa))

[0119] A mixture of CrO6 and FeO (15% CrO6 content) is added to molten iron in a ladle (molten iron temperature 1300℃, empty ladle temperature 700℃). The amount of CrO6 added is 1.8 kg per ton of molten iron. CrO6 oxidizes low-valence titanium in the molten iron to high-valence titanium and reduces CrO6 to Cr2O3. FeO, with its low melting temperature, forms a low-melting-temperature slag with the binder, inhibiting the formation of the binder. The low-melting-temperature slag has a melting temperature of 1290℃ and covers the surface of the molten iron, providing insulation. Metallic iron from the binder enters the molten iron.

[0120] Example 12 (Method A, Method 1, Oxidizing substance (b) + Slag-forming agent (aa))

[0121] A mixture of pyrolusite (MnO2) and slagging agent FeO (15% MnO2 content) is added to molten iron in a ladle (molten iron temperature 1300℃, empty ladle temperature 700℃). The amount of mixture added is 1.9 kg of MnO2 per ton of molten iron. MnO2 oxidizes low-valence titanium in the molten iron to high-valence titanium, and MnO2 is reduced to MnO. FeO, with its low melting temperature, forms a low melting temperature slag with the binder, inhibiting the formation of the binder. The low melting temperature slag has a melting temperature of 1290℃ and covers the surface of the molten iron, providing insulation. Metallic iron in the binder enters the molten iron.

[0122] Example 13 (Method A, Option 1, Oxidizing substance (b) + Slag-forming agent (bb))

[0123] A mixture of MnO2, CrO6, MgO, CaO, Al2O3, and SiO2 (CrO6 content 3%, MnO2 2%, basicity CaO / SiO2 1.1, MgO 6%, Al2O3 7%) is added to the molten iron in the ladle (molten iron temperature 1320℃, empty ladle temperature 710℃). The amount of mixture added is based on the MnO2+CrO6 content, with 1.7 kg of MnO2+CrO6 added per ton of molten iron. Fe3O4 oxidizes low-valence titanium in the molten iron to high-valence titanium and reduces CrO6 to Cr2O3. These react with the slagging agent to form a low-melting-temperature slag of ordinary blast furnace slag type. The binder enters the low-melting-temperature slag, inhibiting its formation. The slag melting temperature is 1270℃, covering the surface of the molten iron and providing insulation. The metallic iron in the binder enters the molten iron.

[0124] Comparative Example 7

[0125] Other conditions were the same as in Example 13, but MnO2 and CrO6 were not added. The low-valence titanium in the binder was not oxidized, resulting in a high melting temperature. At the same time, no low-melting-temperature slag was formed, which could not inhibit melting.

[0126] Example 14 (Method A, Option 1, Oxidizing substance (b) + Slagging agent (cc))

[0127] A mixture of MnO2 and ordinary blast furnace slag (MnO2 content 5%, basicity CaO / SiO2 1.1, MgO 5%, Al2O3 5%, other components 3%) is added to the molten iron in the ladle (molten iron temperature 1320℃, empty ladle temperature 700℃). The mass of MnO2 added per ton of molten iron is 2.1 kg. MnO2 oxidizes low-valence titanium in the molten iron to high-valence titanium, reducing MnO2 to MnO. This reacts with the ordinary blast furnace slag to form a low-melting-temperature slag of ordinary blast furnace slag type. The binder enters the low-melting-temperature slag, inhibiting its formation. The slag has a melting temperature of 1250℃ and covers the surface of the molten iron, providing insulation. Metallic iron from the binder enters the molten iron.

[0128] Example 15 (Method A, Option 1, Oxidizing substance (b) + Slagging agent (cc))

[0129] A mixture of CrO6, MnO2, and ordinary blast furnace slag (CrO6 content 1%, MnO2 content 4%, basicity CaO / SiO2 1.1, MgO 5%, Al2O3 5%, others 3%) is added to the molten iron in the ladle (molten iron temperature 1320℃, empty ladle temperature 700℃). Based on the CrO6+MnO2 content in the mixture, the mass of (CrO6+MnO2) added per ton of molten iron is 2.0 kg. (CrO6+MnO2) oxidizes low-valence titanium in the molten iron to high-valence titanium, reduces CrO6 to Cr2O3, and reduces MnO2 to MnO. It reacts with ordinary blast furnace slag to form a low-melting-temperature slag of ordinary blast furnace slag type. The binder enters the low-melting-temperature slag, inhibiting its formation. The slag melting temperature is 1260℃, covering the surface of the molten iron and providing insulation. Metallic iron from the binder enters the molten iron.

[0130] Example 16 (Method A, Scheme 1, Oxidizing substance (b) + Slag-forming agent (aa) + Slag-forming agent (bb))

[0131] A mixture of MnO2, FeO, CaO, Al2O3, MgO, and SiO2 (5% MnO2, 1.1 CaO / SiO2 ratio, 7% Al2O3, 6% MgO, and 1% FeO) is added to the molten iron in the ladle (molten iron temperature is 1320℃, empty ladle temperature is 700℃). The amount of mixture added is based on the amount of MnO2 in the mixture, with 1.8 kg of MnO2 added per ton of molten iron. Fe3O4 oxidizes the low-valence titanium in the molten iron to high-valence titanium, and Fe3O4 is reduced to FeO. It then reacts with CaO, Al2O3, MgO, and SiO2 to form a low-melting-temperature slag of the ordinary blast furnace slag type. The binder enters the low-melting-temperature slag, inhibiting the formation of binders. The slag melting temperature is 1270℃, covering the surface of the molten iron and playing a heat-insulating role. At the same time, metallic iron in the binder enters the molten iron.

[0132] Example 17 (Method A, Scheme 1, Oxidizing substance (b) + Slag-forming agent (aa) + Slag-forming agent (cc))

[0133] A mixture of CrO6, MnO2, FeO, and ordinary blast furnace slag (CrO6 1%, MnO2 4%, FeO 1%, CaO / SiO2 1.1%, Al2O3 5%, MgO 5%, others 3%) is added to the molten iron in the ladle (molten iron temperature is 1320℃, empty ladle temperature is 700℃). The amount of mixture added is based on the (CrO6+MnO2) content in the mixture, with 2.1 kg of (CrO6+MnO2) added per ton of molten iron. Fe3O4 oxidizes the low-valence titanium in the molten iron to high-valence titanium, and Fe3O4 is reduced to FeO, which reacts with ordinary blast furnace slag to form a low melting temperature slag of ordinary blast furnace slag type. The binder enters the low melting temperature slag, inhibiting the formation of binders. The melting temperature of the slag is 1250℃, covering the surface of the molten iron and playing a heat-preserving role. At the same time, metallic iron in the binder enters the molten iron.

[0134] Example 18 (Method A, Scheme 1, Oxidizing substance (b) + Slag-forming agent (aa) + Slag-forming agent (bb) + Slag-forming agent (cc))

[0135] A mixture of MnO2, FeO, SiO2, Al2O3, and ordinary blast furnace slag (MnO2 6%, FeO 1%, SiO2 1%, Al2O3 1%, ordinary blast furnace slag 91% (CaO / SiO2 1.1, Al2O3 4%, MgO 5%, others 4%)) is added to the molten iron in the ladle (molten iron temperature 1320℃, empty ladle temperature 700℃). The amount of mixture added is 2.1 kg / ton of molten iron, based on the MnO2 content. MnO2 oxidizes low-valence titanium in the molten iron to high-valence titanium, reducing MnO2 to MnO. This reacts with the ordinary blast furnace slag to form a low-melting-temperature slag of ordinary blast furnace slag type. The slag, with a melting temperature of 1240℃, covers the surface of the molten iron and also provides insulation.

[0136] Example 19 (Method A, Method 1, Oxidizing Substance (c))

[0137] Nickel smelting slag (FeO 36%, Fe3O4 15%, SiO2 40%, other components 9%) is added to molten iron in a ladle (molten iron temperature 1360℃, empty ladle temperature 700℃) at a rate of 0.8 kg / ton of molten iron. The Fe3O4 in the nickel smelting slag oxidizes low-valence titanium in the chromium-containing molten iron to high-valence titanium, lowering the melting temperature of the binder. This binder then enters the low-melting-temperature nickel smelting slag (main crystalline phase is frital olivine), inhibiting binder formation. The slag melting temperature is 1290℃, covering the surface of the molten iron and providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0138] Example 20 (Method A, Method 1, Oxidizing Substance (c))

[0139] Lead smelting slag (FeO 36%, Fe3O4 15%, SiO2 38%, and other components 11%) is added to molten iron in a ladle (molten iron temperature 1330℃, empty ladle temperature 760℃) at a rate of 0.8 kg / ton of molten iron. The Fe3O4 in the lead smelting slag oxidizes low-valence titanium in the chromium-containing molten iron to high-valence titanium, lowering the melting temperature of the binder. This binder then enters the low-melting-temperature lead smelting slag (main crystalline phase is fritolite), forming a low-melting-temperature slag that inhibits binder formation. The slag has a melting temperature of 1280℃ and covers the surface of the molten iron, providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0140] Example 21 (Method A, Method 1, Oxidizing Substance (c))

[0141] Tin smelting slag (FeO 39%, Fe3O4 12%, SiO2 38%, other components 11%) is added to molten iron in a ladle (molten iron temperature 1310℃, empty ladle temperature 780℃) at a rate of 0.8 kg / ton of molten iron. The Fe3O4 in the tin smelting slag oxidizes the low-valence titanium in the molten iron to high-valence titanium, lowering the melting temperature of the binder. This binder then enters the low-melting-temperature nickel smelting slag (main crystalline phase is frital olivine), forming a low-melting-temperature slag that inhibits the formation of binders. The slag has a melting temperature of 1230℃ and covers the surface of the molten iron, providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0142] Example 22 (Method A, Method 1, Oxidizing Substance (c))

[0143] Copper smelting slag (43% FeO, 15% Fe3O4, 31% SiO2, and 11% other components) is added to molten iron in a ladle (molten iron temperature 1330℃, empty ladle temperature 710℃) at a rate of 0.6 kg / ton of molten iron. The Fe3O4 in the copper smelting slag oxidizes the low-valence titanium in the molten iron to high-valence titanium, lowering the melting temperature of the binder. This binder then enters the low-melting-temperature copper smelting slag (main crystalline phase is fritolite), forming a low-melting-temperature slag that inhibits the formation of binders. The slag has a melting temperature of 1220℃ and covers the surface of the molten iron, providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0144] Example 23 (Method A, Method 1, Oxidizing Substance (c))

[0145] Add a mixture of copper smelting slag (43% FeO, 15% Fe3O4, 31% SiO2, and 11% other components), zinc smelting slag (35% FeO, 22% Fe3O4, 35% SiO2, and 8% other components), and tin smelting slag (36% FeO, 15% Fe3O4, 38% SiO2, and 11% other components) to the molten iron (molten iron temperature 1350℃, empty molten iron temperature 700℃) in a ladle. The mixture contains 50% copper smelting slag, 20% tin smelting slag, and 30% zinc smelting slag. The addition amount is 0.8 kg per ton of molten iron. In the smelting slag, Fe3O4 oxidizes low-valence titanium in the molten iron to high-valence titanium, lowering the melting temperature of the binder. This binder then enters the smelting slag with a low melting temperature (the main crystalline phase is fritolite), forming a low-melting-temperature slag that inhibits the formation of binders. The slag has a melting temperature of 1270℃ and covers the surface of the molten iron, providing insulation. At the same time, metallic iron in the binder enters the molten iron.

[0146] Example 24 (Method A, Method 1, Oxidizing substance (a) + Oxidizing substance (b) + Slag-forming agent (aa))

[0147] A mixture of Fe2O3, CrO6, and FeO slagging agent (4% Fe2O3 and 1% CrO6) is added to molten iron in a ladle (molten iron temperature 1300℃, empty ladle temperature 700℃). The amount of mixture added is calculated based on the Fe2O3 + CrO6 content, with 1.7 kg of Fe2O3 + CrO6 added per ton of molten iron. Fe2O3 + CrO6 oxidizes low-valence titanium in the molten iron to high-valence titanium, reduces Fe2O3 to FeO, and reduces CrO6 to Cr2O3. The low-melting-temperature FeO forms a low-melting-temperature slag with the binder, inhibiting the formation of the binder. The low-melting-temperature slag has a melting temperature of 1270℃ and covers the surface of the molten iron, providing insulation. At the same time, metallic iron from the binder enters the molten iron.

[0148] Example 25 (Method A, Method 1, Oxidizing substance (a) + Oxidizing substance (b) + Slag-forming agent (aa))

[0149] A mixture of Fe3O4, pyrolusite (MnO2), and slagging agent FeO (3% Fe3O4 and 12% MnO2) is added to molten iron in a ladle (molten iron temperature 1300℃, empty ladle temperature 700℃). The amount of mixture added is calculated as Fe3O4 + MnO2, with 1.8 kg of Fe3O4 + MnO2 added per ton of molten iron. MnO2 oxidizes low-valence titanium in the molten iron to high-valence titanium, reduces Fe3O4 to FeO, and reduces MnO2 to MnO. The low-melting-temperature FeO forms a low-melting-temperature slag with the binder, inhibiting the formation of the binder. The low-melting-temperature slag has a melting temperature of 1270℃ and covers the surface of the molten iron, providing insulation. At the same time, metallic iron from the binder enters the molten iron.

[0150] Example 26 (Method A, Method 1, Oxidizing substance (a) + Oxidizing substance (b) + Slag-forming agent (bb))

[0151] A mixture of Fe3O4, MnO2, CrO6, MgO, CaO, Al2O3, and SiO2 (Fe3O4 content 1%, CrO6 content 2%, MnO2 content 2%, basicity CaO / SiO2 1.1, MgO 6%, Al2O3 7%) is added to the molten iron in the ladle (molten iron temperature is 1320℃, empty ladle temperature is 700℃). The amount of mixture added is based on the content of Fe3O4, MnO2, and CrO6 in the mixture, and the mass of Fe3O4, MnO2, and CrO6 added per ton of molten iron is 1.8 kg. Fe3O4, MnO2, and CrO6 oxidize low-valence titanium in molten iron to high-valence titanium, reduce MnO2 to MnO, and reduce CrO6 to Cr2O3. They react with slag-forming agents to form a low-melting-temperature slag of the ordinary blast furnace slag type. The binder enters the low-melting-temperature slag, inhibiting the formation of binders. The melting temperature of the slag is 1260℃, which covers the surface of the molten iron and plays a role in heat preservation. At the same time, metallic iron in the binder enters the molten iron.

[0152] Example 27 (Method A, Scheme 1, Oxidizing agent (a) + Oxidizing agent (b) + Slagging agent (cc))

[0153] A mixture of Fe3O4, MnO2, and ordinary blast furnace slag (Fe3O4 content 1%, MnO2 content 4%, CaO / SiO2 ratio 1.1, Al2O3 5%, MgO 5%, other components 3%) is added to the molten iron in the ladle (molten iron temperature 1320℃, empty ladle temperature 700℃). Based on the Fe3O4 and MnO2 content in the mixture, the mass of Fe3O4 and MnO2 added per ton of molten iron is 2.2 kg. Fe3O4 and MnO2 oxidize the low-valence titanium in the molten iron to high-valence titanium, Fe3O4 is reduced to FeO, and MnO2 is reduced to MnO. These react with the ordinary blast furnace slag to form a low-melting-temperature slag of ordinary blast furnace slag type. The binder enters the low-melting-temperature slag, inhibiting its formation. The slag has a melting temperature of 1250℃ and covers the surface of the molten iron, providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0154] Example 28 (Method A, Option 1, Oxidizing substance (b) + Slag-forming agent (cc))

[0155] A mixture of Fe3O4, CrO6, MnO2, and ordinary blast furnace slag (Fe3O4 content 1%, CrO6 content 1%, MnO2 content 3%, CaO / SiO2 ratio 1.1, Al2O3 content 5%, MgO content 5%, and others 3%) is added to the molten iron in the ladle (molten iron temperature is 1320℃, empty ladle temperature is 700℃). Based on the mixture of Fe3O4+CrO6+MnO2, the mass of (Fe3O4+CrO6+MnO2) added per ton of molten iron is 2.1 kg. (Fe3O4+CrO6+MnO2) oxidizes low-valent titanium in molten iron to high-valent titanium, reduces Fe3O4 to FeO, reduces CrO6 to Cr2O3, and reduces MnO2 to MnO. It reacts with ordinary blast furnace slag to form a low melting temperature slag of ordinary blast furnace slag type. The binder enters the low melting temperature slag, inhibiting the formation of binders. The melting temperature of the slag is 1250℃. It covers the surface of molten iron and plays a heat preservation role. At the same time, metallic iron in the binder enters the molten iron.

[0156] Example 29 (Method A, Method 1, Oxidizing substance (a) + Oxidizing substance (b) + Slagging agent (aa) + Slagging agent (bb))

[0157] A mixture of Fe3O4, MnO2, FeO, CaO, Al2O3, MgO, and SiO2 (1% Fe3O4, 4% MnO2, CaO / SiO2 ratio 1.1, 7% Al2O3, 6% MgO, and 1% FeO) is added to the molten iron in the ladle (molten iron temperature is 1320℃, empty ladle temperature is 700℃). The amount of mixture added is based on Fe3O4 + MnO2 in the mixture, and the mass of Fe3O4 + MnO2 added per ton of molten iron is 1.9 kg. Fe3O4 oxidizes low-valence titanium in molten iron to high-valence titanium, and Fe3O4 is reduced to FeO. It then reacts with CaO, Al2O3, MgO, and SiO2 to form a low-melting-temperature slag, which is typical of blast furnace slag. The binder enters the low-melting-temperature slag, inhibiting its formation. The slag has a melting temperature of 1240℃ and covers the surface of the molten iron, providing insulation. At the same time, metallic iron from the binder enters the molten iron.

[0158] Example 30 (Method A, Scheme 1, Oxidizing substance (a) + Oxidizing substance (b) + Slag-forming agent (aa) + Slag-forming agent (cc))

[0159] Add a mixture of Fe3O4, CrO6, MnO2, FeO and ordinary blast furnace slag (Fe3O4 1%, CrO6 1%, MnO2 3%, FeO 1%, CaO / SiO2 1.1%, Al2O3 5%, MgO 5%, others 3%) to the molten iron in the ladle (molten iron temperature is 1320℃, empty ladle temperature is 700℃). The amount of mixture added is based on the mixture (Fe3O4+CrO6+MnO2), and 2.3 kg of (Fe3O4+CrO6+MnO2) is added per ton of molten iron. The Fe3O4+CrO6+MnO2 oxidizes low-valence titanium in molten iron to high-valence titanium, reduces Fe3O4 to FeO, reduces CrO6 to Cr2O3, and reduces MnO2 to MnO. It reacts with ordinary blast furnace slag to form a low melting temperature slag of ordinary blast furnace slag type. The binder enters the low melting temperature slag, inhibiting the formation of binders. The melting temperature of the slag is 1230℃. It covers the surface of the molten iron and plays a role in heat preservation. At the same time, the metallic iron in the binder enters the molten iron.

[0160] Example 31 (Method A, Scheme 1, Oxidizing substance (a) + Oxidizing substance (b) + Slag-forming agent (aa) + Slag-forming agent (bb) + Slag-forming agent (cc))

[0161] Add a mixture of Fe3O4, MnO2, FeO, SiO2, Al2O3, and ordinary blast furnace slag (Fe3O4 1%, MnO2 5%, FeO 1%, SiO2 1%, Al2O3 1%, ordinary blast furnace slag 91% (CaO / SiO2 1.1, Al2O3 4%, MgO 5%, others 4%) to the molten iron in the ladle (molten iron temperature 1320℃, empty ladle temperature 700℃). The amount of mixture added is based on the Fe3O4+ content in the mixture. Based on MnO2, 2.2 kg of Fe3O4+MnO2 is added per ton of molten iron. Fe3O4+MnO2 oxidizes low-valence titanium in the molten iron to high-valence titanium, Fe3O4 is reduced to FeO, and MnO2 is reduced to MnO. It reacts with ordinary blast furnace slag to form a low melting temperature slag of ordinary blast furnace slag type. The binder enters the low melting temperature slag, inhibiting the formation of binders. The melting temperature of the slag is 1220℃. It covers the surface of the molten iron and plays a role in heat preservation. At the same time, the metallic iron in the binder enters the molten iron.

[0162] Example 32 (Method A, Method 1, Oxidizing substance (a) + Oxidizing substance (b))

[0163] A mixture of Fe3O4 and MnO2 (6% Fe3O4, 1% MnO2) is added to molten iron in a ladle (molten iron temperature 1300℃, empty ladle temperature 700℃). The mass of Fe3O4 + MnO2 added per ton of molten iron is 0.5 kg. Fe3O4 oxidizes low-valence titanium in the molten iron to high-valence titanium, and Fe4O4 is gradually reduced to FeO. The low-melting-temperature FeO forms a low-melting-temperature slag with the binder, inhibiting the formation of the binder. The low-melting-temperature slag has a melting temperature of 1260℃ and covers the surface of the molten iron, providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0164] ii. When the binder does not contain low-valent titanium:

[0165] Example 34 (Method A, Mode 2, Single Slag-Forming Agent (aa))

[0166] FeO is added to an empty ladle (temperature 700℃), followed by molten iron (temperature 1350℃). The amount of FeO added is 1.5 kg per ton of molten iron. The low melting temperature FeO forms a low melting temperature slag with the binder, inhibiting the formation of the binder. The low melting temperature slag has a melting temperature of 1270℃ and covers the surface of the molten iron, providing insulation. At the same time, metallic iron from the binder enters the molten iron.

[0167] Example 35 (Method A, Mode 2, Single Slag-Forming Agent (aa))

[0168] FeO is added to an empty ladle (temperature 700℃) containing a binder, followed by molten iron (temperature 1350℃). The mixture is added at a rate of 1.5 kg per ton of molten iron. The low-melting-temperature FeO reacts with the binder to form a low-melting-temperature slag. The binder gradually melts, and the slag, with a melting temperature of 1270℃, covers the surface of the molten iron, providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0169] After 30 cycles of the above process, the adhesive residue in the molten iron ladle disappears.

[0170] Example 36 (Method A, Method 2, Slag-forming agent (bb))

[0171] Based on the mineral phase and chemical composition of ordinary blast furnace slag, CaO, Al2O3, MgO, and SiO2 were added to molten iron in a ladle (molten iron temperature 1350℃, empty ladle temperature 700℃). The basicity was CaO / SiO2 = 1.1, Al2O3 = 7%, and MgO = 6%, with a mixture addition of 3 kg / ton of molten iron. CaO, Al2O3, MgO, and SiO2 reacted to generate a slag with a low melting temperature (ordinary blast furnace slag structure, melting temperature 1280℃). The binder melted and entered, covering the surface of the molten iron, providing insulation. At the same time, metallic iron from the binder entered the molten iron.

[0172] Example 37 (Method A, Scheme 1, Slag-forming agent (cc))

[0173] Nickel smelting slag (FeO 36%, Fe3O4 15%, SiO2 40%, other components 9%) is added to molten iron in a ladle (molten iron temperature 1360℃, empty ladle temperature 700℃) at a rate of 0.8 kg / ton of molten iron. The Fe3O4 in the nickel smelting slag oxidizes low-valence titanium in the chromium-containing molten iron to high-valence titanium, lowering the melting temperature of the binder. This binder then enters the low-melting-temperature nickel smelting slag (main crystalline phase is frital olivine), inhibiting binder formation. The slag melting temperature is 1290℃, covering the surface of the molten iron and providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0174] Example 38 (Method A, Method 2, Slag-forming agent (cc))

[0175] Lead smelting slag (FeO 36%, Fe3O4 15%, SiO2 38%, and other components 11%) is added to molten iron in a ladle (molten iron temperature 1330℃, empty ladle temperature 760℃) at a rate of 0.8 kg / ton of molten iron. The Fe3O4 in the lead smelting slag oxidizes low-valence titanium in the chromium-containing molten iron to high-valence titanium, lowering the melting temperature of the binder. This binder then enters the low-melting-temperature lead smelting slag (main crystalline phase is fritolite), forming a low-melting-temperature slag that inhibits binder formation. The slag has a melting temperature of 1280℃ and covers the surface of the molten iron, providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0176] Example 39 (Method A, Mode 2, Slag-forming agent (cc))

[0177] Tin smelting slag (FeO 39%, Fe3O4 12%, SiO2 38%, other components 11%) is added to molten iron in a ladle (molten iron temperature 1310℃, empty ladle temperature 780℃) at a rate of 0.8 kg / ton of molten iron. The Fe3O4 in the tin smelting slag oxidizes the low-valence titanium in the molten iron to high-valence titanium, lowering the melting temperature of the binder. This binder then enters the low-melting-temperature nickel smelting slag (main crystalline phase is frital olivine), forming a low-melting-temperature slag that inhibits the formation of binders. The slag has a melting temperature of 1230℃ and covers the surface of the molten iron, providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0178] Example 40 (Method A, Method 2, Slag-forming agent (cc))

[0179] Copper smelting slag (43% FeO, 15% Fe3O4, 31% SiO2, and 11% other components) is added to molten iron in a ladle (molten iron temperature 1330℃, empty ladle temperature 710℃) at a rate of 0.6 kg / ton of molten iron. The Fe3O4 in the copper smelting slag oxidizes the low-valence titanium in the molten iron to high-valence titanium, lowering the melting temperature of the binder. This binder then enters the low-melting-temperature copper smelting slag (main crystalline phase is fritolite), forming a low-melting-temperature slag that inhibits the formation of binders. The slag has a melting temperature of 1220℃ and covers the surface of the molten iron, providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0180] Example 41 (Method A, Mode 2, Slag-forming agent (cc))

[0181] Add a mixture of copper smelting slag (43% FeO, 15% Fe3O4, 31% SiO2, and 11% other components), zinc smelting slag (35% FeO, 22% Fe3O4, 35% SiO2, and 8% other components), tin smelting slag (36% FeO, 15% Fe3O4, 38% SiO2, and 11% other components), and steel slag (55% CaO, 8% SiO2, 3% MgO, 20% Fe2O3, and 14% other components) to the molten iron (molten iron temperature 1350℃, empty molten iron temperature 700℃) in a ladle. The mixture consists of 50% copper smelting slag, 20% tin smelting slag, 27% zinc smelting slag, and 3% steel slag. The addition amount is 0.8 kg per ton of molten iron. In the smelting slag, Fe3O4 oxidizes low-valence titanium in the molten iron to high-valence titanium, lowering the melting temperature of the binder. This binder then enters the smelting slag with a low melting temperature (the main crystalline phase is fritolite), forming a low-melting-temperature slag that inhibits the formation of binders. The slag has a melting temperature of 1270℃ and covers the surface of the molten iron, providing insulation. At the same time, metallic iron in the binder enters the molten iron.

[0182] Example 42 (Method A, Method 2, Slag-forming agent (cc))

[0183] Ordinary blast furnace slag (basicity CaO / SiO2 1.1, Al2O3 5%, MgO 5%, TiO2 3%, other components 3%) is added to molten iron in a ladle (molten iron temperature 1360℃, empty ladle temperature 700℃) at a rate of 3.6 kg / ton of molten iron. The binder enters the ordinary blast furnace slag (with a melting temperature of 1280℃), which has a lower melting temperature, inhibiting the formation of binders. The molten slag, with a melting temperature of 1260℃, covers the surface of the molten iron, providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0184] Comparative Example 8 (Method A, Method 2, Slag-forming agent (cc))

[0185] Other conditions are the same as in Example 42, with a TiO2 content of 4% in the blast furnace slag, forming titanium-containing blast furnace slag. The titanium-containing blast furnace slag has a high melting temperature, and the binder cannot dissolve into the titanium-containing blast furnace slag.

[0186] Example 43 (Method A, Mode 2, Slag-forming agent (aa) + slag-forming agent (bb))

[0187] A mixture of FeO and SiO2 (molar ratio of 2:1, based on the molar ratio of iron to silicon dioxide in the chemical formula of fir olivine) is sprayed around the molten iron ladle (molten iron temperature 1350℃, empty ladle temperature 700℃). The mixture is added at a rate of 1.2 kg per ton of molten iron. SiO2 reacts with FeO to generate slag with a low melting temperature (melting temperature 1200℃, main crystalline phase is fir olivine). The binder melts and enters, covering the surface of the molten iron, providing insulation. At the same time, metallic iron from the binder enters the molten iron.

[0188] Comparative Example 9

[0189] Other conditions were the same as in Example 43, but FeO was not added, so a low melting temperature slag system could not be formed, the melting temperature was high, and the melting of the binder was inhibited.

[0190] Example 44 (Method A, Mode 2, Slag-forming agent (aa) + slag-forming agent (bb))

[0191] FeO, MnO, and SiO2 are added to molten iron in a ladle (molten iron temperature 1350℃, empty ladle temperature 700℃). The FeO and MnO mixture comprises 60% FeO and 40% MnO. The molar ratio of the mixture ((FeO+MnO) to SiO2) is 2:1, based on the molar ratio of iron, manganese, and silicon dioxide in the chemical formula of ferromanganese olivine. The amount of mixture added is 1.5 kg per ton of molten iron. SiO2, FeO, and MnO react to form a slag with a low melting temperature (melting temperature 1270℃, main crystalline phase is manganese-ferromanganese olivine). The binder melts and coats the surface of the molten iron, providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0192] Comparative Example 10

[0193] Other conditions are the same as in implementation 44, but without the addition of SiO2, a low melting temperature slag system cannot be formed, the melting temperature is high, and the melting of the binder is inhibited.

[0194] Example 45 (Method A, Mode 2, Slag-forming agent (aa) + slag-forming agent (cc))

[0195] A mixture of FeO and copper smelting slag (5% FeO, 43% FeO, 15% Fe3O4, 31% SiO2, and 11% other components) is added to molten iron in a ladle (molten iron temperature 1330℃, empty ladle temperature 710℃) at a rate of 0.4 kg / ton of molten iron. The binder enters the copper smelting slag (main crystalline phase is fritillary olivine) at its low melting temperature, inhibiting binder formation. The slag melting temperature is 1210℃, covering the surface of the molten iron and providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0196] Example 46 (Method A, Mode 2, Slag-forming agent (aa) + slag-forming agent (cc))

[0197] A mixture of FeO and ordinary blast furnace slag (5% FeO, 700℃ for an empty ladle) is added to molten iron (molten iron temperature 1360℃, empty ladle temperature 700℃) at a rate of 3 kg per ton of molten iron. The ordinary blast furnace slag composition is: basicity CaO / SiO2 1.1, Al2O3 5%, MgO 5%, TiO2 1%, other components 3%). The binder enters the ordinary blast furnace slag with a low melting temperature (melting temperature 1220℃), inhibiting the formation of binders. The molten slag, with a melting temperature of 1260℃, covers the surface of the molten iron, providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0198] Example 47 (Method A, Mode 2, Slag-forming agent (bb) + slag-forming agent (cc))

[0199] A mixture of CaO, SiO2, and tin smelting slag (CaO 4%, SiO2 2%, tin smelting slag composition: FeO 36%, Fe3O4 15%, SiO2 38%, other components 11%) is added to molten iron in a ladle (molten iron temperature 1310℃, empty ladle temperature 780℃) at a rate of 0.9 kg / ton of molten iron. The binder enters the low-melting-temperature nickel smelting slag (main crystalline phase is fir olivine), forming a low-melting-temperature slag that inhibits the formation of binders. The slag has a melting temperature of 1250℃ and covers the surface of the molten iron, providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0200] Example 48 (Method A, Mode 2, Slag-forming agent (aa) + slag-forming agent (bb) + slag-forming agent (cc))

[0201] A mixture of FeO, CaO, SiO2, and ordinary blast furnace slag (FeO 5%, CaO 1%, SiO2 2%, ordinary blast furnace slag 91% (basicity CaO / SiO2 1.1, Al2O3 4%, MgO 5%, TiO2 1%, others 4%) is added to molten iron in a ladle (molten iron temperature 1360℃, empty ladle temperature 700℃). The addition amount is 3 kg / ton of molten iron. The binder enters the ordinary blast furnace slag with a low melting temperature, inhibiting the formation of binders. The slag melting temperature is 1270℃, covering the surface of the molten iron and providing insulation. At the same time, metallic iron from the binder enters the molten iron.

[0202] Example 49 (Method A, Mode 2, Slag-forming agent (aa) + slag-forming agent (bb) + slag-forming agent (cc))

[0203] A mixture of FeO, CaO, MgO, SiO2, and copper smelting slag (FeO 5%, CaO 2%, MgO 1%, SiO2 2%, copper smelting slag composition: FeO 43%, Fe3O4 15%, SiO2 31%, others 11%) is added to molten iron in a ladle (molten iron temperature 1330℃, empty ladle temperature 710℃). The addition amount is 0.5 kg / ton of molten iron. The binder enters the copper smelting slag (main crystalline phase is fritillary olivine) at its low melting temperature, inhibiting the formation of binders. The slag melting temperature is 1230℃, covering the surface of the molten iron and providing insulation. Simultaneously, metallic iron from the binder enters the molten iron.

[0204] Method B:

[0205] Example 50 (Method B, adhesive containing low-valent titanium)

[0206] Molten ordinary blast furnace slag (TiO2 content of 3%) is added to an empty ladle containing adhesive. The temperature of the molten ordinary blast furnace slag is 1500℃. Oxygen-enriched air is introduced, and the adhesive in the ladle gradually melts and is eliminated. The inclusions settle to the bottom of the ladle and are returned to the electric furnace for steelmaking.

[0207] Comparative Example 11

[0208] Other conditions were the same as in Example 50, but oxygen-enriched air was not introduced, the low-valence titanium in the binder was not oxidized, and the binder was not stirred and did not melt.

[0209] Example 51 (Method B, adhesive containing low-valent titanium)

[0210] Molten titanium-containing blast furnace slag is poured into an empty ladle containing adhering material, and oxygen is introduced. The temperature of the molten titanium-containing blast furnace slag is 1280℃, and the TiO2 content in the molten titanium-containing blast furnace slag is 5%. The adhering material in the ladle gradually melts and enters the blast furnace slag, carrying metallic iron which settles to the bottom and is returned to the converter for steelmaking.

[0211] Comparative Example 12 (Method B, the binder contains low-valent titanium)

[0212] Other conditions are the same as in Example 51, but the temperature of the molten titanium-containing blast furnace slag is 1270°C. The slag temperature is low, the oxidation rate is slow, oxygen cannot fully oxidize the low-valence titanium compounds in the binder, and the binder in the molten iron ladle cannot be melted.

[0213] Example 52 (Method B, the binder does not contain low-valent titanium)

[0214] Molten blast furnace slag and molten reduction blast furnace slag (in a ratio of 6:4) are added to an empty ladle containing adhesive material. The molten blast furnace slag is at a temperature of 1540°C. Air is introduced to agitate the ladle, and the adhesive material gradually melts and is eliminated. The inclusions settle to the bottom of the ladle and are returned to the electric furnace for steelmaking.

[0215] Example 53 (Method B, the binder does not contain low-valent titanium)

[0216] Molten ferroalloy slag (nickel-iron slag) is added to an empty ladle containing adhesive material. The temperature of the molten ordinary blast furnace slag is 1580℃. A mixture of nitrogen and argon is introduced. Under the agitation of the gas, the adhesive material in the ladle gradually melts and is eliminated. The mixed metals settle to the bottom of the ladle and are returned to the electric furnace for steelmaking.

[0217] Example 54 (Method B, the binder does not contain low-valent titanium)

[0218] Molten ferroalloy slag (nickel-iron slag) is added to an empty ladle containing binders. The temperature of the molten ordinary blast furnace slag is 1480℃. A mixture of nitrogen, argon and air is introduced. Under the agitation of the gas, the binders in the ladle gradually melt, and the mixed metals settle to the bottom of the ladle and are returned to the electric furnace for steelmaking.

[0219] After repeating the above process three times, the adhesive residue in the molten iron ladle will disappear.

Claims

1. A method for inhibiting or eliminating adhesions in molten iron ladles, characterized in that, Includes either of the following two methods: Method A: A method for inhibiting adhesion of substances to molten iron ladles, the steps of which are as follows: (A-1) Add binder inhibitor to one or more of the following situations: molten iron in a molten iron trough, molten iron in a molten iron ladle, or an empty molten iron ladle. (A-2) The binder inhibitor works in two ways: Method 1: Under the high temperature of molten iron, the binder inhibitor can first oxidize the low-valence titanium in the binder to high-valence titanium oxide. The high-valence titanium oxide gradually melts with the binder inhibitor and the binder after the reaction, entering or forming a low melting temperature slag; Method 2: Under the high temperature of molten iron, the binder inhibitor directly reacts with the binder to form a slag-forming reaction, gradually melting and entering or forming a low melting temperature slag. However, during the reaction, the low-valence titanium in the binder does not undergo oxidation. (A-3) During the process of the binder being suppressed or melted, metallic iron entrained in the binder enters the molten iron; Method B: A method for removing adhering substances from molten iron ladles, the steps of which are as follows: (B-1) Pour one or more of the following slags into an empty ladle containing adhesive material: molten blast furnace slag, electric furnace molten iron slag, molten reduction iron slag, and ferroalloy slag; and then introduce gas to agitate the ladle. (B-2) The binder in the molten iron ladle gradually melts and enters one or more of the following slag mixtures: molten blast furnace slag, electric furnace molten slag, molten reduction slag, and ferroalloy slag, and carries metallic iron to the bottom.

2. The method for inhibiting or eliminating adhesions in molten iron ladles according to claim 1, characterized in that, In step (A-1) of method A, the binder inhibitor is one or both of oxidizing substances and slag-forming agents; The oxidizing substance is: (a) One or two of iron oxides with a valence greater than +2, or a mixture of one or more minerals containing iron oxides with a valence greater than +2; preferably: a mixture of one or more of Fe3O4, Fe2O3, magnetite concentrate or hematite concentrate, and the mass content of Fe3O4 and Fe2O3 in magnetite concentrate and hematite concentrate needs to be ≥30%; or; (b) One or two of oxides of chromium with a +6 valence or manganese with a ≥ +4 valence, or a mixture of one or more minerals containing oxides of chromium with a +6 valence or manganese with a ≥ +4 valence; or; (c) A mixture of one or more of the following: slag containing oxides of iron with a valence greater than +2, chromium with a valence greater than +6, or manganese with a valence greater than +4; preferably: a mixture of one or more of the following: slag containing Fe2O3 or Fe3O4; wherein the slag is a mixture of one or more of the following: heavy metal pyrometallurgical slags of copper, lead, zinc, nickel, and tin, and steel slag. The slag-forming agent is: (aa)FeO; or; (bb) One or more of CaO, Al2O3, FeO, MnO, and MgO are mixed and used with SiO2; or; (cc) A mixture of one or more of the following: copper, lead, nickel, zinc, tin heavy metal pyrometallurgical slag and ordinary blast furnace slag; wherein the ordinary blast furnace slag is in a molten or cold state; wherein the mass content of TiO2 in the ordinary blast furnace slag is ≤3%.

3. The method for inhibiting or eliminating adhesions in molten iron ladles according to claim 2, characterized in that, The selection and application method of the adhesive inhibitor in step (A-1) of method A are as follows: i. When the binder contains low-valent titanium: (1.1) Oxidizing agent (a) can be used alone or in combination with slagging agent. The ways of using it in combination with slagging agent include: ① in combination with slagging agent (aa); ② in combination with slagging agent (bb); ③ in combination with ordinary blast furnace slag in slagging agent (cc); ④ in combination with slagging agent (aa) and slagging agent (bb); ⑤ in combination with slagging agent (aa) and ordinary blast furnace slag in slagging agent (cc); ⑥ in combination with slagging agent (bb) and ordinary blast furnace slag in slagging agent (cc); ⑦ in combination with slagging agent (aa), slagging agent (bb) and ordinary blast furnace slag in slagging agent (cc); When slagging agent (bb) is used in combination with oxidizing agent, SiO2 can be used alone as a slagging agent in combination with oxidizing agent. When oxidizing substances (a) are used alone or in combination with slag-forming agents, the addition amount of each substance is limited as follows: based on iron oxides with a valence greater than +2, the mass of iron oxides with a valence greater than +2 added per ton of molten iron is 0.3 kg to 3 kg. (1.2) Oxidizing substances (b) cannot be used alone and need to be used in combination with slagging agents. The ways to use them in combination with slagging agents include: ① mixing with slagging agent (aa); ② mixing with slagging agent (bb); ③ mixing with ordinary blast furnace slag in slagging agent (cc); ④ mixing with slagging agent (aa) and slagging agent (bb); ⑤ mixing with ordinary blast furnace slag in slagging agent (aa) and slagging agent (cc); ⑥ mixing with ordinary blast furnace slag in slagging agent (bb) and slagging agent (cc); ⑦ mixing with ordinary blast furnace slag in slagging agent (aa), slagging agent (bb), and slagging agent (cc). The limits for the amount of each substance added are as follows: based on the oxides of chromium with a +6 valence and / or manganese with a valence of ≥ +4 valence contained in the mixture, the oxides of chromium with a +6 valence and / or manganese with a valence of ≥ +4 valence contained in the mixture account for 5% to 15% of the total mass of the mixture, and the mass of oxides of chromium with a +6 valence and / or manganese with a valence of ≥ +4 valence added per ton of molten iron is 0.3 kg to 3.0 kg. (1.3) When oxidizing substance (c) is used alone, the addition amount is limited to 0.3 kg to 6 kg of oxidizing substance (c) per ton of molten iron. (1.4) Oxidizing substance (a), oxidizing substance (b) and slagging agent are used in combination, or oxidizing substance (a) is used in combination with oxidizing substance (b). The methods of use include: ① using with slagging agent (aa); ② using with slagging agent (bb); ③ using with ordinary blast furnace slag in slagging agent (cc); ④ using with slagging agent (aa) and slagging agent (bb); ⑤ using with ordinary blast furnace slag in slagging agent (aa) and slagging agent (cc); ⑥ using with ordinary blast furnace slag in slagging agent (bb) and slagging agent (cc); ⑦ using with ordinary blast furnace slag in slagging agent (aa), slagging agent (bb) and slagging agent (cc); ⑧ using oxidizing substance (a) and oxidizing substance (b). The limiting conditions for the proportion of each substance in the mixture are: the mass percentage of oxides containing iron with a valence greater than +2, chromium with a valence greater than +6, and / or manganese with a valence greater than +4 is greater than 5% of the mixture, and the mass percentage of oxides containing chromium with a valence greater than +6 and / or manganese with a valence greater than +4 is less than 15% of the mixture. The addition of the mixture is limited under the following conditions: provided that the proportions of each substance in the mixture are met, the mass of oxides containing iron with a valence greater than +2, chromium with a valence greater than +6, and / or manganese with a valence greater than +4 is 0.3 kg to 3.0 kg per ton of molten iron. ii. When the adhesive does not contain low-valence titanium substances (2.1) Slag-forming agent (aa) is used alone. The addition amount is limited to 0.3 kg to 3 kg of slag-forming agent (aa) per ton of molten iron. (2.2) Slag-forming agent (bb) is used alone. The addition amount is limited to 0.3 kg to 3 kg of slag-forming agent (bb) per ton of molten iron. (2.3) Slag-forming agent (cc) is used alone. The addition amount is limited to 0.3 kg to 6 kg per ton of molten iron. (2.3) When slag-forming agent (aa) and slag-forming agent (bb) are used in combination, the following conditions apply: the mass of the mixture of slag-forming agent (aa) and slag-forming agent (bb) added per ton of molten iron is 0.3 kg to 3 kg. (2.4) Slag-forming agent (aa) and slag-forming agent (cc) are used in combination. The addition amount is limited to 0.3 kg to 3 kg per ton of molten iron. (2.5) When slag-forming agent (bb) and slag-forming agent (cc) are used in combination, the following conditions apply: the mass of the mixture of slag-forming agent (bb) and slag-forming agent (cc) added per ton of molten iron is 0.3 kg to 3 kg. (2.6) Slag-forming agent (aa), slag-forming agent (bb) and slag-forming agent (cc) are used in combination. The addition amount is limited to 0.3 kg to 3 kg per ton of molten iron. Furthermore, the binder inhibitor in step (A-1) of method A also has the function of eliminating binders. The elimination of binders is achieved by cyclic processing of steps (A-1) and (A-2), after which the binders that have been formed disappear. The number of cycles is 20-500.

4. The method for inhibiting or eliminating adhesions in molten iron ladles according to claim 1, characterized in that, In step (A-1) of method A, the binder inhibitor is added in the following ways: directly adding the binder inhibitor to the molten iron during the pouring process, and / or adding the binder inhibitor to the bottom of an empty molten iron ladle before pouring in the molten iron, and / or spraying the binder inhibitor around the empty molten iron ladle; the empty molten iron ladle is a molten iron ladle that has been baked or poured out of the molten iron, and the temperature of the empty molten iron ladle is ≥700℃; the temperature of the molten iron in the molten iron ladle is ≥1300℃.

5. The method for inhibiting or eliminating adhesions in molten iron ladles according to claim 1, characterized in that, In step (A-2) of method A, the melting temperature of the low melting temperature slag is ≤1350℃; the main crystalline phase in the formed low melting temperature slag is one or two of the following: olivine structure, ordinary blast furnace slag structure, and FeO, but excluding magnesium olivine and calcium magnesium olivine structures; the main crystalline phase in the ordinary blast furnace slag is feldspar; and the TiO2 mass content in the ordinary blast furnace slag is ≤3%.

6. The method for inhibiting or eliminating adhesions in molten iron ladles according to claim 1, characterized in that, Steps (B-1) and (B-2) are repeated multiple times to remove the adhesive residue from the molten iron ladle, with the number of cycles being 2-5.

7. The method for inhibiting or eliminating adhesions in molten iron ladles according to claim 1, characterized in that, In step B (B-1) of the method, the molten blast furnace slag is one or both of ordinary blast furnace slag and titanium-containing blast furnace slag; the TiO2 mass content in the ordinary blast furnace slag is ≤3%, and the TiO2 mass content in the titanium-containing blast furnace slag is >3%; the temperature of the molten blast furnace slag, electric furnace smelting slag, molten reduction smelting slag, and ferroalloy slag is ≥1280℃, and when the slag temperature is <1280℃, it is heated by an electric furnace; the molten blast furnace slag, electric furnace smelting slag, molten reduction smelting slag, and ferroalloy slag are directly derived from the blast furnace, electric furnace, and molten reduction furnace smelting processes.

8. The method for inhibiting or eliminating adhesions in molten iron ladles according to claim 1, characterized in that, In step (B-1) of method B, the gas is one or more of an oxidizing gas, nitrogen, and argon; the oxidizing gas is one or more of oxygen, air, and oxygen-enriched air; when the binder in step (B-1) contains low-valent titanium, an oxidizing gas is used, or one or more of nitrogen and argon are mixed with the oxidizing gas; when the binder in step (B-1) does not contain low-valent titanium, one or more of an oxidizing gas, nitrogen, and argon are used.