JP2002226865A - Method for producing highly reactive coke for blast furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing highly reactive coke for blast furnace, making blast furnace operation feasible with reducing the fuel rate of blast furnace and increasing productivity. SOLUTION: This method for producing highly reactive coke for blast furnace is characterized by comprising dissolving and/or dispersing a catalyst, for activating reaction of producing carbon monoxide from carbon and carbon dioxide, in water and contacting the thus obtained liquid with coke so as to stick the catalyst on the coke.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a highly reactive coke for a blast furnace, which enables a blast furnace operation to reduce the fuel ratio of the blast furnace and improve productivity.

[0002]

2. Description of the Related Art In a normal blast furnace, iron ore (sinter) and normal blast furnace coke are charged in layers from the furnace top.
After reducing this iron ore in a furnace, pig iron in a molten state is produced.

[0003] In the blast furnace, there is a substantially constant region called a heat preservation zone at a temperature of about 1000 ° C, which usually corresponds to the gasification start temperature of coke for blast furnace.
That is, in order to cause a gasification reaction of coke represented by C + CO ₂ = 2CO in the blast furnace, a temperature of about 1000 ° C. or more is required. About 70% of the reduction of iron ore occurs in the higher temperature region than the heat preservation zone. However, as the temperature increases, the composition of the reduction equilibrium gas becomes higher and the CO concentration becomes higher. A gas having a CO concentration composition is required. Furthermore, at about 1100 ° C. or higher, a melt is generated from iron ore, and as a result, permeation of the reducing gas into iron ore (sinter) is suppressed. For this reason, if the heat storage zone temperature is high, the indirect reduction of iron ore by CO gas cannot be effectively used, and the reduction efficiency does not improve to a certain value or more.

Therefore, conventionally, the production of highly reactive coke for blast furnaces has been attempted as follows. For example, non-coking coal or steam coal, which becomes highly reactive when coked, is blended into the raw coal, or alkalis or iron, which plays a role as a catalyst for promoting the coke gasification reaction, are converted into raw materials. A method of blending with charcoal may be used.

Since highly reactive coke for blast furnaces has high reactivity, when CO ₂ in the blast furnace comes into contact with the coke surface,
The reaction of C + CO ₂ = 2CO is actively performed from a lower temperature. As a result, the CO gas generated in the furnace effectively reacts with the iron ore to promote the reduction reaction.

The reaction of C + CO ₂ = 2CO is an endothermic reaction, and has the effect of lowering the temperature of the heat storage zone in the blast furnace. That is, when using coke for normal blast furnace, 1000
While a heat storage zone of about ℃ is generated and its temperature hardly changes, the use of a highly reactive coke for a blast furnace makes it possible to lower the heat storage zone temperature to 900 to 950 ° C. As a result, the composition of the reduction equilibrium gas is on the low CO concentration side, and the reduction equilibrium reaching point can be afforded, so that the reduction proceeds more and the reduction efficiency is improved. For this reason, if the high-reactivity coke for blast furnace can be used by replacing part or all of the coke for normal blast furnace, the reduction efficiency of the blast furnace can be improved and the coke ratio can be reduced.

[0007]

However, in the method of blending non-slightly caking coal or general coal, if the blending amount is small, the reactivity is not improved, and if the blending amount is large, it is difficult to maintain coke strength. Met. When the coke strength is low, the coke is powdered when charged from the top of the blast furnace, which deteriorates the permeability of the blast furnace. Further, when iron is mixed with coal and carbonized in a coke oven, at a certain temperature or more, the silica brick and the iron constituting the furnace wall of the coke oven react with each other to damage the furnace wall, which is not desirable.

As described above, since a method for producing a highly reactive coke for a blast furnace suitable for use in a blast furnace has not been established, there is a limit in improving the reduction efficiency of the blast furnace.

Therefore, in the present invention, a highly reactive coke for a blast furnace is manufactured, which can maintain the coke strength and maintain the air permeability of the blast furnace, and have no problems in terms of the blast furnace life and the stable operation of the blast furnace. The aim is to provide a method.

[0010]

The gist of the present invention is to provide: (1) an alkaline earth metal, an alkaline earth metal compound, and an alkaline earth metal which are catalysts for activating a reaction for producing carbon monoxide from carbon and carbon dioxide. A blast furnace characterized in that after dissolving and / or dispersing a mixture of a metal and an alkaline earth metal compound or a mixture of alkaline earth metal compounds in water, the liquid is brought into contact with coke and a catalyst is attached to the coke. A method for producing highly reactive coke. (2) a transition metal, a transition metal compound, which is a catalyst for activating a reaction to generate carbon monoxide from carbon and carbon dioxide;
After dissolving and / or dispersing a mixture of a transition metal and a transition metal compound or a mixture of transition metal compounds in water, the liquid is brought into contact with coke, and a catalyst is attached to the coke. Coke production method. (3) dissolving and / or dissolving an alkali metal, an alkali metal compound, a mixture of an alkali metal and an alkali metal compound, or a mixture of alkali metal compounds, which is a catalyst for activating a reaction for generating carbon monoxide from carbon and carbon dioxide, in water; A method for producing highly reactive coke for a blast furnace, comprising, after dispersing, bringing the liquid into contact with coke and causing a catalyst to adhere to the coke. (4) As a catalyst for activating a reaction to generate carbon monoxide from carbon and carbon dioxide, a transition metal, a transition metal compound,
A mixture of a transition metal and a transition metal compound, a group consisting of a mixture of transition metal compounds, or an alkali metal, an alkali metal compound, a mixture of an alkali metal and an alkali metal compound,
A group consisting of a mixture of alkali metal compounds, wherein at least one of the groups is used in combination,
(1) The method for producing a highly reactive coke for a blast furnace according to (1). (5) The transition metal of the group consisting of transition metals, transition metal compounds, mixtures of transition metals and transition metal compounds or mixtures of transition metal compounds is nickel and iron, or cobalt and iron, (2). Or the method for producing a highly reactive coke for a blast furnace according to (4). (6) an alkaline earth metal of the group consisting of an alkaline earth metal, an alkaline earth metal compound, a mixture of an alkaline earth metal and an alkaline earth metal compound or a mixture of alkaline earth metal compounds is calcium; The transition metal of the group consisting of a transition metal compound, a mixture of a transition metal and a transition metal compound or a mixture of transition metal compounds is iron or nickel, and the production of the highly reactive coke for a blast furnace according to (4), Method. (7) When dissolving and / or dispersing the catalyst in water,
(1) The high reactivity for blast furnace according to any one of (1) to (6), wherein a substance having a hydrophobic group and a hydrophilic group in one molecule and / or a substance having an adhesive function is added to the liquid. Coke production method.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present inventors studied a method for producing highly reactive and strong coke,
The inventors invented a method of improving reactivity while maintaining the strength of coke by physically attaching a catalyst to the surface of coke produced in a coke oven.

Since the temperature of the blast furnace coke discharged from the coke oven is as high as 900 ° C. to 1100 ° C., it is cooled immediately after discharging. Cooling methods can be roughly divided into two types: wet fire extinguishing and dry fire extinguishing.

In wet fire extinguishing, coke is discharged to a fire extinguishing train, then conveyed to a fire extinguisher tower, and cooled by sprinkling water from above. The wet-fired coke is
It is discharged onto a cork wharf and transported to a blast furnace by a belt conveyor.

[0014] On the other hand, in dry fire extinguishing, coke is discharged to a receiving bucket, then conveyed to a dry fire extinguishing device, and cooled in a closed vessel by nitrogen gas. The cooled coke is discharged from the dry fire extinguisher and is conveyed to a blast furnace by a belt conveyor.

Since the catalyst is usually a powder, even if the coke and the powder are mixed as they are, almost no catalyst particles remain on the coke surface.

The inventor has found that the catalyst is dissolved and / or dispersed in water in advance and the liquid is brought into contact with coke, whereby the residual ratio of catalyst particles on the coke surface is dramatically improved.

When the solubility of the catalyst in water is low and the catalyst particles are dispersed in water, the catalyst particles enter the unevenness or coke surface of the coke and are physically attached to the coke by the water, It is retained even after the water has evaporated. In addition, when the catalyst has high solubility in water and is soluble in water in an ionic state, the specific surface area of the catalyst that has entered the unevenness of the coke surface or into the pores is further improved, and the reactivity is dramatically improved. I do.

Examples of the catalyst for activating the reaction of C + CO ₂ = 2CO include alkaline earth metals, alkaline earth metal compounds, mixtures of alkaline earth metals and alkaline earth metal compounds or mixtures of alkaline earth metal compounds. .

The term "alkaline earth metal" is a general term for Be, Mg, Ca, Sr, and Ba belonging to Group 2 of the periodic table, and the term "alkaline earth metal compound" refers to a hydroxide or an oxide of an alkaline earth metal. Substances, peroxides, hydroxides, nitrides, carbides, salts (eg, halides, nitrates, carbonates, sulfates, acetates, oxalates, etc.), double salts and the like. Typical examples include quicklime and limestone, which are conventionally used industrially in the iron making process, are easily and inexpensively available, and can use abundant resources in nature. .

Here, as the amount of the added alkaline earth metal, the larger the added amount, the greater the effect as a catalyst.
Although there is no particular upper limit or lower limit, it is generally desirable that the loading amount is 0.01 mol% or more with respect to the carbon in the coke. This amount is, for example, quicklime (C
aO) and limestone (CaCO ₃ ) in an amount of 0.048% by mass or more, respectively, based on the carbon in the coke.
This corresponds to a supported amount of 084% by mass or more. Also, since about 10% ash is contained in coke, quicklime (Ca
O) and limestone (CaCO ₃ ), respectively, at least 0.043% by mass and 0.076% by mass with respect to the coke mass.
It corresponds to a supported amount of not less than mass%.

As a catalyst for activating the reaction of C + CO ₂ = 2CO, there are a transition metal, a transition metal compound, a mixture of a transition metal and a transition metal compound or a mixture of transition metal compounds. A transition metal is an atom that has an incompletely filled d-shell or an element that produces such a cation, and is an element from groups 3 to 11 of the periodic table (Sc, Y,
Ti, Zr, V, Nb, Cr, Mo, Mn, Tc, F
e, Ru, Co, Rh, Ni, Pd, Cu, Ag, etc.)
Wherein the transition metal compound is a hydroxide, oxide, peroxide, hydroxide, nitride, carbide, salt (eg, halide, nitrate, carbonate, sulfate, acetate, acetate) of these transition metals. Oxalate), double salts and the like. The mixture of a transition metal and a transition metal compound is a mixture containing at least one kind of each of the above transition metals and transition metal compounds.
The mixture of transition metal compounds is a mixture containing two or more of the above transition metal compounds.

A typical transition metal is iron.
In the iron making process, there is a merit that iron powder, iron oxide, or a slurry containing iron powder and iron oxide, which is inferior for reuse as a resource, can be easily and inexpensively obtained.

The upper limit and lower limit of the amount of the transition metal added are not particularly defined since the effect of the catalyst increases as the amount of the transition metal increases. It is desirable that the supporting amount is 0.01 mol% or more. For example, in the case of iron (Fe) and iron ore, this amount is 0.04 to carbon in coke, respectively.
This corresponds to a supported amount of 7% by mass or more and 0.078% by mass or more. Further, since about 10% of ash is contained in coke, in the case of iron (Fe) and iron ore, it corresponds to a supported amount of 0.042% by mass or more and 0.068% by mass or more based on the mass of coke, respectively. .

Further, as a catalyst for activating the reaction of C + CO ₂ = 2CO, there is an alkali metal, an alkali metal compound or a mixture of alkali metal compounds.

The alkali metal is L belonging to Group 1 of the periodic table.
i, Na, K, Rb, Cs, and Fr are general terms for alkali metal compounds, such as alkali metal hydroxides, oxides, peroxides, hydroxides, nitrides, carbides, and salts (eg, halogens). Compounds, nitrates, carbonates, sulfates, acetates, oxalates, etc.), double salts and the like.

Here, the addition amount of the alkali metal is as follows.
The upper limit and the lower limit are not particularly defined because the effect of the catalyst is larger as the amount of addition is larger, but generally, the content is 0.01 mol% or more and 0.1 mol or less based on the carbon in the coke.
It is desirable that the loading amount is 1% or less. This amount corresponds to, for example, in the case of sodium (Na), a supported amount of 0.018% by mass or more and 0.18% by mass or less based on carbon in coke. Further, since about 10% of ash is contained in coke, in the case of sodium (Na), it corresponds to a supported amount of 0.016% by mass or more and 0.16% by mass or less based on the mass of coke.

A group consisting of an alkaline earth metal compound or a mixture of alkaline earth metal compounds, a transition metal, a transition metal compound, a mixture of a transition metal and a transition metal compound, a mixture of transition metal compounds, or an alkali metal; An alkali metal compound, a mixture of an alkali metal and an alkali metal compound, a group consisting of a mixture of alkali metal compounds,
The reaction can be more activated by using one or more of at least one group in combination.

The coke carrying the catalyst component by the above-described method has a lower C + CO ₂ = 2CO reaction temperature than the conventional coke in any of the methods. Depends on When nickel or cobalt, which is a transition metal, is supported alone, the low-temperature activity is the highest in a carbon dioxide atmosphere. descend. By using nickel and iron or cobalt and iron together when the catalyst is supported, a decrease in low-temperature activity in an atmosphere coexisting with carbon monoxide can be suppressed.

In particular, when nickel and iron are used together, the reaction initiation temperature can be reduced in the case of a composition with a high Ni ratio, and in the case of a composition with a high Fe ratio,
It has been newly found that the reaction rate can be improved. Therefore, the mixing ratio of Ni and Fe may be appropriately set according to the purpose.

Usually, these are nickel salts and iron salts or
Often used in the form of cobalt and iron salts.

When calcium alone, which is an alkaline earth metal, is supported alone, the low-temperature activity is reduced in the same manner as described above in an atmosphere coexisting with carbon monoxide. In the case of calcium, however, iron or nickel, which is a transition metal, is removed. By using them together, a decrease in low-temperature activity in an atmosphere coexisting with carbon monoxide can be suppressed.

These are also usually used in the form of calcium salts, iron salts or nickel salts.

In order to further penetrate the catalyst into the unevenness or pores of the coke surface, a substance having a hydrophobic group and a hydrophilic group in one molecule may be added to the aqueous catalyst solution. This is because coke is a substance mainly composed of carbon, and thus has almost no hydrophilic groups on the surface and has poor wettability with water. Examples of the substance having a hydrophobic group and a hydrophilic group in one molecule include an alcohol and a surfactant.

In order to improve the rate of catalyst particles remaining on the coke surface, a substance having an adhesive function may be added. This substance acts like a glue, and serves to attach the catalyst particles to the coke surface. Specifically, for example, a typical polyvinyl alcohol as an aqueous solution adhesive, polyvinyl alcohol-acrylic acid copolymer,
There are polyvinyl acetate and the like, and gelatin, starch, cellulose, carboxymethyl cellulose and the like can also be used.

Further, when dissolving and / or dispersing the catalyst, both a substance having a hydrophobic group and a hydrophilic group in one molecule and a substance having an adhesive function are added to the liquid, so that the catalyst can be used independently of each other. , A greater reactivity improving effect can be enjoyed.

Here, the state in which the catalyst is dissolved means a state in which the catalyst is dissolved in water in an ionic state. Also, the state in which the catalyst is dispersed, the solubility of the catalyst in water is low,
It means a state of being dispersed in a particle or colloidal state.

As a method of bringing the liquid in which the catalyst is dissolved and / or dispersed into contact with coke, a method of spraying the liquid from above the coke and a method of dipping the coke in the liquid can be considered. Since spraying is not always preferable for blast furnace operation, spraying is preferable.

As a place where the liquid in which the catalyst is dissolved and / or dispersed is sprayed on the coke, for example, the following places can be considered.

In the case of wet fire extinguishing, the catalyst may be dissolved and / or dispersed in water used for fire extinguishing. In the case of dry fire extinguishing, the coke temperature after discharging the dry fire extinguisher is 80.
Since the temperature is about 150 ° C., by spraying a liquid obtained by dissolving and / or dispersing the catalyst on the coke immediately after being discharged from the dry fire extinguisher, water is evaporated by the sensible heat of the coke, and only the catalyst is deposited on the coke surface. It is possible to adhere.

Alternatively, spraying can be performed on a belt conveyor for conveying coke to the blast furnace, or at a connecting chute.

In general, spraying a liquid in which a catalyst is dissolved and / or dispersed in a place close to a blast furnace has a higher catalyst retention rate on the coke surface. The spraying location may be determined.

[0042]

[Example] Furnace width 425 mm, furnace height 400 mm, furnace length 60
Using a 0 mm test coke oven, a blended coal of 65% caking coal and 35% non-fine caking coal was charged at a charge density of 0.83 dry-t / m.
Charge at a charge density of ³ , furnace temperature 1250 ° C, dry distillation time 1
It was distilled under the conditions of 8.5 hours. The coke after calcination was cooled with nitrogen, and then cooled by a drum rotation tester used in a coke drum strength test method according to JIS K2151.
The coke subjected to 0 rotation impact was sized to 20 ± 1 mm, and a catalyst was added by the following method.

In Example 1, a liquid in which limestone was dispersed in 5% by mass of water was sprayed on coke.

In Example 2, a liquid in which 5% by mass of fine iron ore was dispersed in water was sprayed onto coke.

In Example 3, a liquid in which limestone and fine iron ore were each dispersed in water at 2.5% by mass was sprayed onto coke.

In Example 4, a liquid in which limestone and fine iron ore were each dispersed in 2.5% by mass of a 1% by mass aqueous solution of sodium chloride was sprayed on coke.

In Example 5, limestone was dispersed in water by 5% by mass, and a solution containing 5% by mass of ethanol was sprayed on coke.

In Example 6, limestone was dispersed in water at 5% by mass, and a solution containing 5% by mass of ethanol and 1% by mass of polyvinyl alcohol was sprayed on coke.

The mass of the coke after drying was measured, and the mass of the catalyst carried on the coke surface was determined from the mass change before and after the addition of the catalyst. The catalyst loading was expressed as a percentage of the weight of the supported catalyst to the weight of carbon in the coke. In each of the examples, the supported amount of the catalyst was within the range of the desired supported amount. Further, the amount of supported Na having an upper limit was 0.04% by mass with respect to the carbon in the coke in Example 4, which was within the range of the present invention.

Further, the mass after the coke was treated with a vibrating sieve for 3 minutes was measured, and the amount of peeling of the catalyst due to impact was determined from the mass change before and after the sieve treatment. The catalyst residual ratio (%) after impact was represented by (1−catalyst exfoliated amount / catalyst added amount) × 100.

Thereafter, the coke was filled in a reaction vessel, and CO ₂ gas (5 liter / m ₂₎ was heated at a temperature of 1100 ° C.
in) and the mass after reacting for 1 hour was calculated, and (mass before the reaction / mass after the reaction) × 100 was determined as a reaction rate (%).

As shown in Table 1, the conversion was 8% of that of the comparative example.
On the other hand, it can be seen that it has increased to 20-35%.

[0053]

[Table 1]

As described above, according to the present invention, the reactivity is high.
It turns out that highly reactive coke for blast furnaces can be manufactured.

Next, a furnace width of 400 mm, a furnace height of 600 mm,
Using a test coke oven with a furnace length of 600 mm, caking coal 70
%, Non-sintered coal 30%, and blended coal in which the blending ratio of caking coal is slightly increased at a loading density of 0.81 dry-t / m ³ , and a furnace temperature of 1270 ° C. The carbonization was performed under the conditions of a carbonization time of 18.5 hours. The coke after calcination was cooled with nitrogen, and then the coke subjected to an impact of 30 rotations with a rotary tester used in a coke drum strength test method according to JIS K2151 was sized to 20 ± 1 mm. The catalyst was added in the same manner.

In Example 7, coke was immersed for 5 seconds in a liquid in which limestone was dispersed in water at 5% by mass.

In Example 8, coke was immersed for 5 seconds in a liquid in which fine iron ore was dispersed at 5% by mass in water.

In Example 9, coke was immersed for 5 seconds in a liquid in which limestone and fine iron ore were each dispersed in water at 2.5% by mass.

In Example 10, coke was immersed for 5 seconds in a liquid in which limestone and fine iron ore were each dispersed in 2.5% by mass of a 1% by mass aqueous solution of sodium chloride.

In Example 11, limestone was added to water in an amount of 5% by mass.
After the dispersion, the coke was immersed in a solution containing 5% by mass of ethanol for 5 seconds.

In Example 12, limestone was added to water in an amount of 5% by mass.
After the dispersion, the coke was immersed in a solution containing 5% by mass of ethanol and 1% by mass of polyvinyl alcohol for 5 seconds.

The mass of the coke after drying was measured, and the mass of the catalyst supported on the coke surface was determined from the change in mass before and after the addition of the catalyst. The catalyst loading was expressed as a percentage of the weight of the supported catalyst to the weight of carbon in the coke. In each of the examples, the supported amount of the catalyst was within the range of the desired supported amount. In addition, the amount of supported Na having an upper limit was 0.03% by mass with respect to the carbon in the coke in Example 4, which was within the range of the present invention.

Further, the mass after the coke was treated with a vibrating sieve for 3 minutes was measured, and the amount of catalyst peeled off by impact was determined from the change in mass before and after the sieve treatment. The catalyst residual ratio (%) after impact was represented by (1−catalyst exfoliated amount / catalyst added amount) × 100.

Thereafter, the coke was filled in a reaction vessel, and CO ₂ gas (5 liter / m ₂₎ was heated at a temperature of 1100 ° C.
in) and the mass after reacting for 1 hour was calculated, and (mass before the reaction / mass after the reaction) × 100 was determined as a reaction rate (%).

As shown in Table 2, the conversion was 7% in Comparative Example 2.
% To 19-25%.

[0066]

[Table 2]

Next, the coke produced under the same conditions as in Examples 1 to 6 was pulverized and sized to 150 to 300 μm.
The nitrates of Fe, Ni, Co, and Ca were dissolved in water in the combination shown in Table 3, and the respective metals supported 0.1 mol% of the carbon in the sized coke (total 0.2 mol).
1%). After drying the coke supporting the metal salt, CO / CO was measured using a thermobalance.
₂ = 10 ° C / 50/50 (vol / vol) atmosphere
The temperature was raised to 1000 ° C in min.
The mass reduction rate at 000 ° C. was determined. Here, the mass reduction starting temperature is the mass reduction rate for 10 seconds (that is, (mass reduction amount /
(Initial mass) x 100) was always the lowest temperature above 0.004%. The mass loss rate at 1000 ° C. is the ratio of the mass loss at 1000 ° C. to the initial mass. It can be seen that the addition of these catalysts significantly lowers the mass reduction start temperature and the mass reduction rate as compared with Comparative Example 3.

[0068]

[Table 3]

The catalyst of the above example used nitrate,
It was confirmed by similar experiments that, besides the nitrate, any other salt having solubility in water, such as sulfate, acetate, chloride, etc., could exhibit the same performance regardless of the kind of the salt.

Further, in the above embodiments, combinations of two kinds of metals are shown. However, these combinations are the minimum combinations necessary for achieving the function, and even combinations of three or more kinds of elements shown in the embodiments are possible. Needless to say, performance is exhibited.

Further, by changing the ratio of Fe to Ni with the combination of the additives of Example 13, the amount of Fe + Ni supported was set to 0.1.
(Constant 2 mol%) The sample was supported on coke, and the weight loss of coke was determined by a thermobalance under the same conditions as described above. Even with Ni alone (Example 17) or Fe alone (Example 22), a decrease in the mass reduction initiation temperature (that is, the reaction initiation temperature) and a mass reduction rate of 1000 ° C. (that is, an increase in the reaction rate) are observed as compared with Comparative Example 3. However, various reactive coke can be obtained by changing the mixing ratio of Ni and Fe. For example, when the main purpose is to lower the reaction start temperature,
Formulations with a high Ni ratio (Examples 13, 18, and 19) are preferred, and when aiming at improving the reaction rate rather than lowering the reaction initiation temperature, a composition with a high Fe ratio (Examples 20, 2 and 19).
1) is preferred (Table 4).

[0072]

[Table 4]

[0073]

According to the present invention, highly reactive coke for a blast furnace can be manufactured by an extremely simple method. According to the present invention, a method for producing a highly reactive coke for a blast furnace suitable for use in a blast furnace is established, and its industrial value is great in that reduction efficiency of the blast furnace can be expected.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kiyoshi Shibata 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Corporation Technology Development Division (72) Inventor Masaaki Naito 20-1 Shintomi, Futtsu-shi, Chiba New Japan F-term (Reference) 4H012 PA00 in Technology Development Division of Steel Corporation

Claims (7)

[Claims] 1. An alkaline earth metal, an alkaline earth metal compound, a mixture of an alkaline earth metal and an alkaline earth metal compound or an alkaline earth metal which is a catalyst for activating a reaction for producing carbon monoxide from carbon and carbon dioxide. A method for producing a highly reactive coke for a blast furnace, comprising dissolving and / or dispersing a mixture of metal compounds in water, and then bringing the liquid into contact with coke to attach a catalyst to the coke. 2. A catalyst for activating a reaction for producing carbon monoxide from carbon and carbon dioxide, wherein a transition metal, a transition metal compound, a mixture of a transition metal and a transition metal compound, or a mixture of transition metal compounds is dissolved in water. And / or dispersing the liquid and bringing the liquid into contact with coke to cause the catalyst to adhere to the coke, thereby producing a highly reactive coke for a blast furnace. 3. An alkali metal, an alkali metal compound, a mixture of an alkali metal and an alkali metal compound, or a mixture of alkali metal compounds, which is a catalyst for activating a reaction for producing carbon monoxide from carbon and carbon dioxide, is dissolved in water. And / or dispersing the liquid and bringing the liquid into contact with coke to cause the catalyst to adhere to the coke, thereby producing a highly reactive coke for a blast furnace. 4. A catalyst for activating a reaction for producing carbon monoxide from carbon and carbon dioxide, which is a transition metal, a transition metal compound, a mixture of a transition metal and a transition metal compound, a group consisting of a mixture of transition metal compounds, or an alkali. 2. The blast furnace according to claim 1, wherein at least one selected from the group consisting of a metal, an alkali metal compound, a mixture of an alkali metal and an alkali metal compound, and a mixture of an alkali metal compound is used in combination. A method for producing highly reactive coke. 5. The transition metal of the group consisting of a transition metal, a transition metal compound, a mixture of a transition metal and a transition metal compound or a mixture of transition metal compounds is nickel and iron or cobalt and iron. Item 5. The method for producing a highly reactive coke for a blast furnace according to item 2 or 4. 6. An alkaline earth metal of the group consisting of an alkaline earth metal, an alkaline earth metal compound, a mixture of an alkaline earth metal and an alkaline earth metal compound or a mixture of alkaline earth metal compounds is calcium, 5. The highly reactive coke for blast furnace according to claim 4, wherein the transition metal of the group consisting of a metal, a transition metal compound, a mixture of a transition metal and a transition metal compound or a mixture of transition metal compounds is iron or nickel. Manufacturing method. 7. When the catalyst is dissolved and / or dispersed in water, a substance having a hydrophobic group and a hydrophilic group in one molecule and / or a substance having an adhesive function is added to the liquid. A method for producing a highly reactive coke for a blast furnace according to any one of claims 1 to 6.