Preparation method for cold-pressing dedusting coke powder into pellets

Abstract

The invention relates to the technical field of dedusting coke powder, and discloses a preparation method for cold-pressing dedusting coke powder into pellets, which comprises the following steps: S1, recycling dedusting coke powder; s2, mixing; s3, ball pressing; s4, standing is carried out; s5, drying; s6, finishing the granules; s7, steelmaking use, wherein S1 comprises the step of carrying out centralized recovery treatment on the dedusting coke powder raw material; the step S2 further comprises the steps that the dedusting coke powder collected in the step S1 and a carbon composite adhesive are stirred and mixed, the stirring speed is 50-80 r / min, and the mass ratio of the dedusting coke powder to the carbon composite adhesive is 200: 9; according to the preparation method for cold-pressing the dust-removed coke powder into the pellets, the dust-removed coke powder is pressed into the pellets which are cold-pressed, so that an exothermic agent or a carburant which can be easily digested and absorbed in a steelmaking process is digested in a converter smelting or refining link of steelmaking, and a converter and an LF ladle refining furnace become an absorption and absorption device for solid waste materials; and the steel mill is resource-saving and environment-friendly.

Description

Technical Field

[0001] The present invention relates to the technical field of dedusting coke powder, and particularly to a preparation method for cold-pressing dedusting coke powder into pellets. Background Technique

[0002] During the daily production process of coke-making and gas-making in a coking plant, some dry coke powder is generated and collected through a dust collector system. Wet coke powder is discharged into a sedimentation tank by wet dust removal in a coke oven, and then the wet coke powder is fished out of the tank by a grab crane and stacked for drying. The moisture content of the dried wet coke powder is 41.7% by weight. Originally, the dry and wet coke powder was processed by selling it externally. However, with the marketization of commodities, it is difficult to sell the dry and wet coke powder externally and it affects environmental protection.

[0003] Dedusting coke powder is a by-product generated during the production process of the dry quenching process in a coking plant, with a particle size of less than 3 mm, and more than 60,000 tons are generated annually. As a kind of waste, a small part of the dedusting coke powder is used for blending coal for coking and the blast furnace iron-making process. However, during the iron-smelting process, it will be blown away by the gas flow in the furnace and cannot play the role of a skeleton, resulting in a large loss. The application of dedusting coke powder in the steel-making process for increasing carbon in common carbon steel grades is relatively less; the fixed carbon requirement for the carbon-increasing agent used in steel-making is high, and the content requirements for impurities such as ash, volatile matter, sulfur, phosphorus, and nitrogen are low, and it is also required to be dry, clean, and have a particle size of 1 - 5 mm, with a moderate particle size. If the particle size is too small, it is easy to burn out, and if the particle size is too large, it will float on the surface of the molten steel after being added to the ladle and is not easily absorbed by the molten steel. The proportion of the particle size of the dedusting coke powder less than 0.5 mm accounts for 99%, and the particle size of the dedusting coke powder is much smaller than the requirement of the carbon-increasing agent. Therefore, it is necessary to process the dedusting coke powder before use; in view of this, we have proposed a preparation method for cold-pressing dedusting coke powder into pellets. Summary of the Invention

[0004] The purpose of the present invention is to provide a preparation method for cold-pressing dedusting coke powder into pellets to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A preparation method for cold-pressing dedusting coke powder into pellets, comprising the following steps:

[0006] S1. Recovery of dedusting coke powder;

[0007] S2. Mixing;

[0008] S3. Pelletizing;

[0009] S4. Standing;

[0010] S5. Drying;

[0011] S6. Screening;

[0012] S7. Use in steel-making.

[0013] Optionally, S1 further includes: centrally recycling and processing the dedusted coke powder raw material.

[0014] Optionally, S2 further includes: stirring and mixing the dedusted coke powder collected in S1 with the carbon composite binder at a stirring speed of 50 - 80 r / min, and the mass ratio of the dedusted coke powder to the carbon composite binder is: 200:9.

[0015] Optionally, S3 further includes: pouring the raw material after mixing the dedusted coke powder and the carbon composite binder into a powerful briquetting machine for briquetting.

[0016] Optionally, S4 further includes: standing and coupling for curing for more than 24 hours after forming the shaped balls.

[0017] Optionally, S5 further includes: continuously drying with a plate dryer for 40 minutes, and controlling the heating temperature of the hot blast stove at 150 - 300 °C.

[0018] Optionally, S6 further includes: crushing the dried material in S5 through a trough-type pair of rolls and forming it into dedusted coke powder pellets.

[0019] Optionally, S7 further includes: packing the material formed into dedusted coke powder pellets in S6 into standard bags for production tests.

[0020] Compared with the prior art, the present invention provides a preparation method for cold-pressing dedusted coke powder into pellets, having the following beneficial effects:

[0021] This preparation method for cold-pressing dedusted coke powder into pellets presses the dedusted coke powder into a cold-pressed pellet, making it an exothermic agent or carburizer that is easy to digest and absorb during the steelmaking process, and digesting it in the converter smelting or refining process of steelmaking, so that the converter and the LF ladle refining furnace become absorption and disposal devices for solid waste materials, enabling the steel plant to achieve resource conservation and environmental friendliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic flow diagram of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Such as Figure 1As shown in the figure, the present invention provides a technical solution: a preparation method for cold-pressing dedusted coke powder into pellets, comprising the following steps:

[0025] S1. Recycling of dedusted coke powder, centrally recycling and treating the raw material of dedusted coke powder;

[0026] S2. Mixing, stirring and mixing the dedusted coke powder collected in S1 with a carbon composite binder at a stirring speed of 50 - 80 r / min, and the mass ratio of the dedusted coke powder to the carbon composite binder is: 200:9;

[0027] S3. Pelletizing, pouring the raw material after mixing the dedusted coke powder and the carbon composite binder into a powerful pelletizing machine for pelletizing treatment;

[0028] S4. Standing, standing and coupling for curing for more than 24 hours after forming the shaped balls;

[0029] S5. Drying, continuously drying for 40 minutes by a plate dryer, and controlling the heating temperature of the hot blast stove at 150 - 300 °C;

[0030] S6. Granulating, crushing the dried material in S5 through grooved counter-rotating rollers, and forming it into dedusted coke powder pellets;

[0031] S7. Using in steelmaking, packing the material formed into dedusted coke powder pellets in S6 into standard bags for production tests.

[0032] As an application of this embodiment:

[0033] The preparation method for cold-pressing dedusted coke powder into pellets presses the dedusted coke powder into a cold-pressed pellet, making it an exothermic agent or carburizer that is easy to be digested and absorbed during the steelmaking process, and being digested in the converter smelting or refining process of steelmaking, making the converter and the LF ladle refining furnace become absorption and digestion devices for solid waste materials, enabling the steel plant to achieve resource conservation and environmental friendliness.

[0034] The above text generally describes the present invention in detail, but based on the present invention, some modifications or improvements can be made, which are obvious to those of ordinary skill in the technical field. Therefore, modifications or improvements made without departing from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A preparation method for cold-pressing dedusted coke powder into pellets, including xx, characterized in that: It includes the following steps: S1. Dust removal coke powder recovery; S2. Mixing; S3. Pelletizing; S4. Standing; S5. Drying; S6. Screening; S7. Used in steelmaking.

2. The preparation method of a dust-removing coke powder cold-pressed into pellets according to claim 1, characterized in that: The said S1 includes: carrying out centralized recovery treatment on the raw material of dust removal coke powder.

3. The preparation method of a pellet formed by cold pressing dedusting coke powder according to claim 2, characterized in that: The said S2 further includes: carrying out stirring and mixing treatment on the dust removal coke powder collected in S1 and the carbon composite binder, the stirring speed is 50 - 80 r / min, and the mass ratio of the dust removal coke powder to the carbon composite binder is: 200:

9.

4. A method for preparing dust-removing coke powder cold-pressed into pellets according to claim 3, characterized in that: The said S3 further includes: pouring the raw material after mixing the dust removal coke powder and the carbon composite binder into a powerful pelletizing machine for pelletizing treatment.

5. A method for preparing dust-removing coke powder cold-pressed into pellets according to claim 4, characterized in that: The said S4 further includes: standing and coupling for curing for more than 24 hours after forming pellets.

6. The preparation method of a dust-removing coke powder cold-pressed into pellets according to claim 5, characterized in that: The said S5 further includes: continuously drying with a plate dryer for 40 minutes, and controlling the heating temperature of the hot blast stove at 150 - 300 °C.

7. A preparation method for cold-pressing dust-containing coke powder into pellets according to claim 6, characterized in that: The said S6 further includes: passing the dried material in S5 through a trough-type pair of rollers for crushing and screening into dust removal coke powder pellets.

8. The preparation method of a dust-removing coke powder cold-pressed into pellets according to claim 7, characterized in that: The said S7 further includes: packing the material screened into dust removal coke powder pellets in S6 into standard bags for production tests.

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