Coke passivator

Abstract

The invention relates to the technical field of coke production assistants, in particular to a coke passivator which is composed of the following components: 50-60 parts of a boron compound; 3-5 parts of silica gel; 2-4 parts of activated carbon; 20 to 30 parts of silicon dioxide; 10 to 20 parts of a binder; and 1 part of water. The preparation method comprises the following steps: mixing a boron compound, silica gel, activated carbon, silicon dioxide, a binder and water according to a ratio, stirring the mixture for 1-2 hours at normal temperature to fully and uniformly mix, and filtering or centrifugally separating to obtain the coke passivator. The passivator is placed in a vacuum drying box, vacuum drying is conducted for 24-48 hours at the temperature of 80-100 DEG C, the coke passivator is smashed or ground after drying, and the coke passivator with the needed particle size is obtained. The method has the beneficial effects of reducing the coke activity and improving the heat intensity, thereby reducing the fuel ratio of the blast furnace, reducing the material collapse frequency of the blast furnace, realizing smooth operation of the blast furnace and improving the use effect and the economic benefit of the coke.

Description

Technical Field

[0001] The invention belongs to the technical field of coke production additives, and in particular relates to a coke passivating agent. Background Art

[0002] Coke is an important fuel and raw material, widely used in metallurgy, chemical industry and other industries. However, due to its high activity, coke is easily oxidized and burned under high temperature conditions, which leads to a decrease in the stability of coke, affecting its quality and use effect. Therefore, it is of great significance to develop a passivating agent that can reduce the activity of coke and improve its stability. Summary of the invention

[0003] In view of this, the present invention provides a coke passivator. By adding the coke passivator into the coke production process, the activity of the coke can be effectively reduced, the thermal strength of the coke can be improved, the blast furnace fuel ratio can be reduced, the number of blast furnace collapses can be reduced, and the blast furnace can run smoothly.

[0004] To achieve the above object, the present invention provides the following technical solutions, which mainly include:

[0005] A coke passivator comprises boron compound, silica gel, activated carbon, silicon dioxide, a binder and water, which are mixed in a specific ratio.

[0006] Preferably, in the above coke passivating agent, the boron compound includes boric acid, borax and boric oxide, and the weight ratio of the boric acid: borax: boric oxide is 1:1-3:1-3.

[0007] Preferably, in the above-mentioned coke passivator, the silica gel is microporous silica gel.

[0008] Preferably, in the above-mentioned coke passivator, the activated carbon is granular activated carbon.

[0009] Preferably, in the above coke passivator, the silicon dioxide is nano silicon dioxide.

[0010] Preferably, in the above-mentioned coke passivator, the binder is coal tar pitch or tar adhesive.

[0011] Preferably, in the above coke passivating agent, the water is deionized water.

[0012] The present invention also provides a method for preparing a coke passivating agent, comprising the following steps:

[0013] The boron compound, silica gel, activated carbon, silicon dioxide, a binder and water are mixed in a specific proportion, and the mixture is stirred at room temperature for 1-2 hours to make it fully mixed.

[0014] Preferably, in the above-mentioned method for preparing the coke passivator, the coke passivator is obtained by filtration or centrifugal separation.

[0015] Preferably, in the above-mentioned method for preparing the coke passivator, the passivator is placed in a vacuum drying oven and vacuum dried at 80-100° C. for 24-48 hours.

[0016] Preferably, in the above-mentioned method for preparing the coke passivator, after the drying step, the coke passivator is crushed or ground to obtain a coke passivator of a desired particle size.

[0017] It can be seen from the above technical solution that, compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. Reduce the activity of coke: The coke passivator of the present invention can effectively reduce the activity of coke, reduce the occurrence of oxidation reaction, and improve the stability of coke by adding ingredients such as boron compounds, silica gel, and activated carbon.

[0019] 2. Improve the thermal strength of coke: The components in the coke passivator of the present invention have good oxidation resistance and heat resistance, can enhance the thermal strength of coke, and extend the service life of coke.

[0020] In summary, the coke passivator of the present invention has the beneficial effects of reducing the activity of coke, improving the thermal strength of coke, etc., thereby reducing the blast furnace fuel ratio, reducing the number of blast furnace collapses, smoothing the blast furnace, and improving the use effect and economic benefits of coke. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The present invention mainly comprises:

[0023] Embodiment 1:

[0024] 100 g of boron compound, 50 g of silica gel, 30 g of activated carbon, 20 g of silicon dioxide, 10 g of binder and 100 mL of water were mixed according to a certain proportion, and the mixture was stirred at room temperature for 1 hour to be fully mixed. Then, the mixture was centrifuged to obtain a coke passivator.

[0025] The obtained coke passivator is added to the coke production process, which can effectively reduce the activity of coke, improve the thermal strength of coke, reduce the blast furnace fuel ratio, reduce the number of blast furnace collapses, and make the blast furnace run smoothly. The coke passivator in this embodiment can effectively reduce the activity of coke, thereby preparing high-quality coke. At the same time, the coke passivator of the present invention does not contain harmful substances, has the advantages of environmental protection and health, and is suitable for the preparation of coke in steelmaking and other metallurgical processes.

[0026] Embodiment 2:

[0027] 200 g of boron compound, 100 g of silica gel, 50 g of activated carbon, 30 g of silicon dioxide, 15 g of binder and 200 mL of water were mixed according to a certain proportion, and the mixture was stirred at room temperature for 2 hours to be fully mixed. Then, the coke passivator was obtained by filtering.

[0028] The obtained coke passivator is applied in the coke production process to effectively reduce the activity of the coke and improve the thermal strength of the coke.

[0029] The component ratio of the coke passivator in this embodiment is slightly different from that in the first embodiment, but both can effectively reduce the activity of coke, improve the mechanical strength and thermal stability of coke, and prepare high-quality coke. At the same time, the coke passivator of the present invention does not contain harmful substances, has the advantages of environmental protection and health, and is suitable for the preparation of coke in steelmaking and other metallurgical processes.

[0030] Reaction test

[0031] Step 1: Spray 21 kg of the aqueous solution of the coke passivator in Examples 1-2 on each ton of coke to test its reactivity and post-reaction strength, and at the same time measure the coke that is not sprayed with the coke passivator in Examples 1-2 as a control example.

[0032] Step 2: After repeating step 1 10 times, the 11 coke reaction data obtained are averaged.

[0033] Coke reaction test record sheet

[0034]

[0035] in conclusion:

[0036] After spraying 21 kg of coke passivator aqueous solution on each ton of coke, the reactivity of coke can be reduced by 3-5 percentage points, the strength after reaction can be increased by 1 percentage point, the blast furnace permeability index can be increased by 300-500 / mineMpa, the coke ratio can be reduced by 8-15kg / t, and the iron production can be increased by 2-4% physical and chemical indicators.

[0037] In summary, the present invention provides a coke passivator and a preparation method thereof, which can effectively reduce the activity of coke and improve the thermal strength of coke. It can improve production efficiency and reduce production costs. At the same time, since it does not contain harmful substances, the harm to the environment and human health is also effectively controlled. By adding the coke passivator, the use effect and economic benefits of coke can be improved, and it has a wide range of application prospects.

[0038] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0039] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coke passivator, characterized in that: The invention is composed of the following components: 50-60 parts of boron compound; 3-5 parts of silica gel; 2-4 parts of activated carbon; 20-30 parts of silicon dioxide; 10-20 parts of binder; and 1 part of water.

2. A coke passivator according to claim 1, characterized in that: The boron compound includes boric acid, borax and boric oxide, and the weight ratio of the boric acid: borax: boric oxide is 1:1-3:1-3.

3. A coke passivator according to claim 1 or 2, characterized in that, The silica gel is microporous silica gel.

4. A coke passivator according to claim 1 or 2, characterized in that: The activated carbon is granular activated carbon.

5. A coke passivator according to claim 1 or 2, characterized in that, The silicon dioxide is nano silicon dioxide.

6. A coke passivating agent according to claim 1 or 2, characterized in that: The binder is coal tar pitch or tar adhesive.

7. A coke passivating agent according to claim 1 or 2, characterized in that: The water is deionized water.

8. A coke passivating agent according to claim 1, characterized in that: The preparation method comprises the following steps: mixing boron compound, silica gel, activated carbon, silicon dioxide, binder and water according to the proportions described in claim 1, stirring the mixture at room temperature for 1-2 hours to make it fully mixed and uniform, and obtaining a coke passivator by filtering or centrifugal separation.

9. A coke passivating agent according to claim 8, characterized in that: The passivating agent is placed in a vacuum drying oven and vacuum dried at 80-100° C. for 24-48 hours.

10. A coke passivating agent according to claim 8 or 9, characterized in that: After the drying step, the coke passivator is crushed or ground to obtain a coke passivator of a desired particle size.

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