CN115888948A - Preparation method of slag micro powder - Google Patents

Abstract

The invention belongs to the technical field of slag micro powder preparation, and particularly relates to a slag micro powder preparation method which comprises the following steps: s1: conveying the slag raw materials into a factory by a loading vehicle, and conveying the slag raw materials into a slag piling shed for storage and airing by a discharge hopper and a belt conveyor; s2: the stacked slag is taken by a forklift, is metered by a hopper and a constant feeder and is conveyed to a lifter through a belt conveyor; s3: in the conveying process, the raw slag material is deironized through an iron remover and then is screened under the action of a vibrating screen. The invention can remove ferromagnetic impurities mixed in the raw slag materials through the iron remover, and the ferromagnetic impurities are pulled to the electric roller by the iron-discarding adhesive tape to be unloaded, thereby achieving the purpose of automatically removing iron, ensuring the safe and normal operation of mechanical equipment such as a pulverizer and the like, and finally conveying the slag micro-powder meeting the fineness requirement to the dust collector for collection, and then conveying the slag micro-powder into a finished product warehouse for storage under the action of the air conveying chute and the hoister.

Description

A kind of preparation method of slag micropowder

technical field

The invention relates to the technical field of slag fine powder preparation, in particular to a preparation method of slag fine powder.

Background technique

Slag micropowder is an admixture for high-performance concrete. Slag micropowder replaces the amount of cement in concrete and cement products for various purposes in equal amounts, which can significantly improve the comprehensive performance of concrete and cement products, and can greatly increase the strength of cement concrete. , to prepare ultra-high-strength cement concrete, and can significantly reduce the bleeding of cement concrete, improve the workability of concrete, and have high use value. At present, slag powder has become the main trend of the building materials industry.

As a new type of admixture for high-performance concrete, slag powder is made from the waste slag produced when smelting pig iron in iron and steel plants after drying and grinding. It is called granulated blast furnace slag powder. Slag grinding is an important part of slag powder production. Grinding efficiency and grinding quality directly affect the cost and quality of slag grinding production, and ferromagnetic impurities are usually mixed in slag, when ferromagnetic impurities follow the slag into the grinding machine and other mechanical equipment When it is inside, it will affect the working status of mechanical equipment such as pulverizers, and there will be accidents of scratching the conveyor belt.

Contents of the invention

Impurities based on ferromagnetism will follow the slag into the mechanical equipment such as the pulverizer, which will affect the working state of the mechanical equipment such as the pulverizer, and there is a technical problem of the accident of scratching the conveyor belt. The present invention proposes a Preparation method of slag fine powder.

A kind of slag micropowder preparation method that the present invention proposes, comprises the following steps:

S1: The slag raw material is transported into the factory by the loading truck, and sent to the slag shed for storage and drying through the unloading hopper and belt conveyor;

S2: The stacked slag is picked up by a forklift, and is transported to the hoist through the belt conveyor after being measured by the hopper and the quantitative feeder;

S3: During the conveying process, the slag raw material is removed through the iron remover, and then screened under the action of the vibrating screen;

S4: After the iron removal and screening are completed, it is sent to the pulverizer for pulverization through air-lock feeding equipment such as a screw conveyor;

S5: The ground slag powder is separated by the powder separator with the help of the hot air provided by the hot blast stove, and is dried at the same time;

S6: After powder selection and drying, the slag coarse powder that does not meet the fineness requirements is discharged from the coarse powder outlet of the separator, and the slag coarse powder is collected centrally through the sealed collection box;

S7: After powder selection and drying, the slag powder that meets the fineness requirements is finally transported to the dust collector for collection, and then enters the finished product warehouse for storage under the action of the air conveying chute and the elevator.

As a preferred embodiment of the present invention, in the above S3, the slag raw material is deironed by the iron remover, and the ferromagnetic impurities in the slag raw material are absorbed, and the ferromagnetic impurities mixed in the slag raw material can be removed.

As a preferred embodiment of the present invention, in the above S3 and S4, the slag raw material is screened through a vibrating screen, and due to the vibration of the screen frame, when the slag raw material flows onto the screen surface, the coarser solid raw material stays on the screen. and discharged from one end along the slope, and the finer solid raw materials are sent to the pulverizer for grinding through the wind-lock feeding equipment such as screw conveyor.

As a preferred embodiment of the present invention, in the above S4, the screw conveyor uses a shaft screw conveyor to transport the slag raw material.

As a preferred embodiment of the present invention, in the above S5, after the slag raw material is ground by the pulverizer, the slag powder obtained by grinding is dried by means of the hot air provided by the hot blast stove, and at the same time is dried by the powder classifier. Powder selection, the slag coarse powder and slag fine powder are screened out.

As a preferred embodiment of the present invention, in said S6, the slag coarse powder that does not meet the fineness requirements after powder selection and drying is discharged from the coarse powder outlet of the separator, and the slag coarse powder is collected via a sealed collection box. Centralized collection, wherein the sealed collection box is installed at the coarse powder outlet in a detachable connection to collect the discharged slag coarse powder.

As a preferred embodiment of the present invention, in the above S7, the slag powder that meets the fineness requirements after powder selection and drying is finally transported to the dust collector for collection, and then enters the Stored in finished product warehouse.

Beneficial effects among the present invention are:

In the present invention, the iron remover installed can remove the ferromagnetic impurities mixed in the slag raw material, and the ferromagnetic impurities are dragged to the electric drum by the iron discarding tape to unload them, so as to achieve the purpose of automatic iron removal and ensure the grinding The machine and other mechanical equipment can work safely and normally. At the same time, it can effectively prevent the accidents caused by large and long slag cracking the conveyor belt. The slag raw material is screened through the vibrating screen. The thicker solid raw materials stay on the sieve surface and are discharged from one end along the slope, and the finer solid raw materials are sent to the pulverizer through the screw conveyor and other air lock feeding equipment for grinding, and the slag powder obtained by grinding is The hot air provided by the hot blast stove is used for drying, and at the same time, the powder is selected by the powder separator, and the slag coarse powder and slag fine powder are screened out. After the powder selection and drying, the slag coarse powder that does not meet the fineness requirements is exported from the powder separator. The slag coarse powder is discharged, and the slag coarse powder is collected centrally through the sealed collection box, wherein the sealed collection box is installed at the coarse powder outlet in a detachable connection to collect the discharged slag coarse powder, and then the slag fine powder that meets the fineness requirements is finally collected. It is transported to the dust collector for collection, and then enters the finished product warehouse for storage under the action of the air conveying chute and elevator, so as to complete the preparation of slag fine powder.

Description of drawings

Fig. 1 is the process flow chart of a kind of slag micropowder preparation method that the present invention proposes;

Fig. 2 is a powder selection flow chart of a method for preparing slag micropowder proposed by the present invention.

Detailed ways

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 some, not all, embodiments of the present invention.

Refer to Figure 1-2

A method for preparing slag fine powder, comprising the following steps:

S1: The slag raw material is transported into the factory by the loading truck, and sent to the slag shed for storage and drying through the unloading hopper and belt conveyor;

S2: The stacked slag is picked up by a forklift, and is transported to the hoist through the belt conveyor after being measured by the hopper and the quantitative feeder;

S3: During the conveying process, the slag raw material is removed through the iron remover, and then screened under the action of the vibrating screen;

S4: After the iron removal and screening are completed, it is sent to the pulverizer for pulverization through air-lock feeding equipment such as a screw conveyor;

S5: The ground slag powder is separated by the powder separator with the help of the hot air provided by the hot blast stove, and is dried at the same time;

S6: After powder selection and drying, the slag coarse powder that does not meet the fineness requirements is discharged from the coarse powder outlet of the separator, and the slag coarse powder is collected centrally through the sealed collection box;

S7: After powder selection and drying, the slag powder that meets the fineness requirements is finally transported to the dust collector for collection, and then enters the finished product warehouse for storage under the action of the air conveying chute and the elevator.

In a specific embodiment, in S3, the slag raw material is removed through the iron remover, so that the ferromagnetic impurities in the slag raw material are absorbed, the ferromagnetic impurities mixed in the slag raw material can be removed, and the iron is removed by the iron discarding tape. The magnetic debris is dragged to the electric drum to be unloaded, so as to achieve the purpose of automatic iron removal, so as to ensure the safe and normal operation of mechanical equipment such as pulverizers, and at the same time, it can effectively prevent the accident of the conveyor belt being scratched by large and long slag.

Further, in S3 and S4, the slag raw material is screened through a vibrating screen, and due to the vibration of the screen frame, when the slag raw material flows onto the screen surface, the coarser solid material stays on the screen surface and is discharged from one end along the inclined plane , the finer solid raw materials are sent to the pulverizer for grinding through the wind-lock feeding equipment such as screw conveyor.

Further, in S4, the screw conveyor uses a shafted screw conveyor to transport the slag raw material, and the rotating helical blade pushes the slag raw material to be transported by the screw conveyor, so that the slag raw material does not rotate with the force of the screw conveyor blade. It is the frictional resistance of the slag raw material's own weight and the casing of the screw conveyor to the slag raw material.

Further, in S5, after the slag raw material is ground by the pulverizer, the slag powder obtained by grinding is dried by the hot air provided by the hot blast stove, and at the same time, the powder is selected by the powder classifier, and the slag coarse powder and slag The fine powder is sifted out.

Further, in S6, the slag coarse powder that does not meet the fineness requirements after powder selection and drying is discharged from the coarse powder outlet of the separator, and the slag coarse powder is collected centrally through the sealed collection box, wherein the sealed collection box adopts a The method of disassembling the connection is installed at the coarse powder outlet to collect the discharged slag coarse powder.

Furthermore, in S7, the slag powder that meets the fineness requirements after powder separation and drying is finally transported to the dust collector for collection, and then enters the finished product warehouse for storage under the action of the air conveying chute and the elevator.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (7)

1. a method for preparing slag micropowder, is characterized in that, comprises the following steps: S1: The slag raw material is transported into the factory by the loading truck, and sent to the slag shed for storage and drying through the unloading hopper and belt conveyor; S2: The stacked slag is picked up by a forklift, and is transported to the hoist through the belt conveyor after being measured by the hopper and the quantitative feeder; S3: During the conveying process, the slag raw material is removed through the iron remover, and then screened under the action of the vibrating screen; S4: After the iron removal and screening are completed, it is sent to the pulverizer for pulverization through air-lock feeding equipment such as a screw conveyor; S5: The ground slag powder is separated by the powder separator with the help of the hot air provided by the hot blast stove, and is dried at the same time; S6: After powder selection and drying, the slag coarse powder that does not meet the fineness requirements is discharged from the coarse powder outlet of the separator, and the slag coarse powder is collected centrally through the sealed collection box; S7: After powder selection and drying, the slag powder that meets the fineness requirements is finally transported to the dust collector for collection, and then enters the finished product warehouse for storage under the action of the air conveying chute and the elevator. 2. The preparation method of a kind of slag micropowder according to claim 1, characterized in that, in said S3, the slag raw material is deironed through the iron remover, and the ferromagnetic impurities in the slag raw material are sucked, and can be mixed in Ferromagnetic impurities in slag raw materials are removed. 3. A kind of slag micropowder preparation method according to claim 1, is characterized in that, in described S3 and S4, slag raw material is screened through vibrating screen, due to the vibration of sieve frame, when slag raw material flows to the sieve surface The thicker solid raw materials stay on the sieve surface and are discharged from one end along the slope, and the finer solid raw materials are sent to the pulverizer for grinding through the air lock feeding equipment such as screw conveyor. 4. A method for preparing slag fine powder according to claim 1, characterized in that, in said S4, said screw conveyor uses a shaft screw conveyor to transport the slag raw material. 5. A kind of slag powder preparation method according to claim 1, is characterized in that, in described S5, after the slag raw material is ground through pulverizer, the slag powder that grinding obtains is provided by the hot air of hot blast stove Drying is carried out, and at the same time, powder is selected through a powder separator to screen out coarse slag powder and fine slag powder. 6. a kind of slag fine powder preparation method according to claim 1, is characterized in that, in described S6, the slag coarse powder that does not meet the fineness requirement is discharged by the coarse powder outlet of powder classifier after powder selection and drying, And the slag coarse powder is collected centrally through the sealed collection box, wherein the sealed collection box is installed at the coarse powder outlet in a detachable connection to collect the discharged slag coarse powder. 7. The preparation method of a kind of slag micropowder according to claim 1, characterized in that, in said S7, the slag micropowder that meets the fineness requirements after powder selection and drying is finally transported to a dust collector for collection, and then in the air Under the action of the conveying chute and the elevator, it enters the finished product warehouse for storage.

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