Stainless steel dedusting ash conveying device and steelmaking system with same

Abstract

The utility model relates to the technical field of stainless steel production equipment, and discloses a stainless steel dedusting ash conveying device and a steelmaking system with the same. The stainless steel dedusting ash conveying device comprises a raw material bin, a first conveying channel is installed at the output end of the raw material bin, and roller stirring equipment is installed at the tail end of the first conveying channel; a second conveying channel is communicated between the input end of the transfer bin and the output end of the roller stirring equipment; and the high-position stock bin is communicated with the transfer bin through a third conveying channel, the third conveying channel is provided with material gasification injection equipment, and steelmaking equipment is installed below the high-position stock bin. The first conveying channel, the second conveying channel and the third conveying channel are all closed channels. The conveying device is located in the closed space in the conveying process, dust generated in the conveying and stirring process of stainless steel dedusting ash and auxiliary materials can be greatly reduced, and therefore the influence of smoke dust on the environment and personnel in the stainless steel production process is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to stainless steel production equipment technical field, concretely relates to a stainless steel dust conveying device and have its steelmaking system. BACKGROUND

[0002] A large amount of smoke dust is usually generated in the stainless steel production process, in order to reduce the gas phase pollution and recover nickel, chromium and iron resources, the smoke dust is generally collected by using the bag dust collector. The main phase of the stainless steel dust is the oxide of metal iron and chromium.

[0003] Because the dust contains chromium in the form of Cr 3+ and Cr 6+ , the stainless steel dust is easy to produce dust in the feeding production process. About 40kg of dust is generated per ton of stainless steel in the Cr-Ni stainless steel smelting production process, and the dust contains a large amount of heavy metal elements such as chromium and nickel. If not properly treated, it is a waste of resources and can cause great harm to the environment and the physical and mental health of production workers. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the utility model provides a stainless steel dust conveying device and a steelmaking system with the same to solve the problem that the stainless steel production process is easy to produce smoke dust, which affects the environment and the health of personnel.

[0005] In the first aspect, the utility model provides a stainless steel dust conveying device, which comprises:

[0006] A raw material bin is provided with a first conveying channel at the output end, and a drum stirring device is installed at the end of the first conveying channel.

[0007] A second conveying channel is connected between the input end of the transfer bin and the output end of the drum stirring device.

[0008] A high-position material bin is connected with the transfer bin through a third conveying channel, a material gasification injection device is installed on the third conveying channel, and a steelmaking device is installed below the high-position material bin.

[0009] The first conveying channel, the second conveying channel and the third conveying channel are all closed channels.

[0010] The stainless steel dust conveying device adds the stainless steel dust and carbon powder, silicon slag, silicon carbide powder, lime and other raw materials into the raw material bin, and then the raw materials are conveyed to the drum stirring equipment through the closed first conveying channel for stirring and mixing. After the stirring and mixing is completed, the mixed raw materials are conveyed to the transfer bin through the second conveying channel. The materials in the transfer bin are sent to the high-position bin by the material gasification injection equipment, and then into the lower steelmaking equipment for smelting. During the conveying process, only raw materials are added at the raw material bin, and the subsequent first conveying channel, drum stirring equipment, second conveying channel, transfer bin, third conveying channel, high-position bin and steelmaking equipment are all in a closed space, which can greatly reduce the dust generated during the conveying and stirring of the stainless steel dust and auxiliary materials, thereby reducing the impact of smoke dust on the environment and personnel during the production of stainless steel.

[0011] In an optional embodiment, the drum stirring equipment includes a drum screen and a stirrer, the first conveying channel is in communication with an inlet of the drum screen, and the second conveying channel is in communication with an output end of the stirrer. The drum screen is adapted to screen and convey material particles with a particle size less than a predetermined size to the stirrer. By screening the particle size of the material entering the stirrer, the particle material larger than the predetermined size is screened out, and the particle material mixture smaller than the predetermined size is added to the stirrer for sufficient stirring and mixing. It is ensured that only the material particles with a particle size less than the predetermined size are sent to the stirrer for mixing, avoiding the problem of uneven mixing or equipment damage caused by oversized particles, improving the mixing efficiency and uniformity of the mixed material.

[0012] In an optional embodiment, the stirrer is fixedly installed below the drum screen. The material conveying process is simplified, so that the qualified particle size material screened by the drum screen can directly fall into the stirrer below without additional conveying equipment or transfer steps, thereby reducing the loss and energy consumption in the material transfer process and improving the compactness of the overall equipment and the continuity of the material processing.

[0013] In an optional embodiment, the output end of the raw material bin is located at the bottom, the input end of the drum stirring equipment is located at the top, and the first conveying channel is a spiral conveying feeder.

[0014] In an optional embodiment, the second conveying channel is a powder pneumatic conveyor.

[0015] In an optional embodiment, a batching bin is further installed between the drum stirring equipment and the transfer bin, the output end of the second conveying channel is in communication with the batching bin, and the batching bin and the transfer bin are in communication through an auxiliary channel.

[0016] In an alternative embodiment, the auxiliary channel is provided with a material gasification injection device, and the dust material is pumped twice by the two material gasification injection devices on the third conveying channel through the auxiliary channel, so that the energy consumption of the pneumatic conveying is greatly reduced, and the operation cost of the device is reduced.

[0017] In a second aspect, the utility model also provides a steelmaking system, including the stainless steel dust conveying device of the application. Because the steelmaking system includes the stainless steel dust conveying device, has the same effect with the stainless steel dust conveying device, and will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the utility model or the technical scheme in the prior art, the drawings needed in the specific embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0019] Figure 1 The schematic diagram of the stainless steel dust conveying device provided by the embodiments of the utility model.

[0020] The reference signs are explained as follows: 1, raw material bin; 2, drum screen; 3, mixer; 4, batching bin; 5, transfer bin; 6, high-position bin; 7, first conveying channel; 8, second conveying channel; 9, third conveying channel; 10, auxiliary channel; 11, steelmaking equipment. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model more clear, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments are some embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] The embodiments of the utility model will be described below in conjunction with Figure 1 , the embodiments of the utility model.

[0023] According to the embodiments of the utility model, on the one hand, a stainless steel dust conveying device is provided, which comprises raw material bin 1, drum screen 2, transfer bin 5 and high-position bin 6 arranged in sequence.

[0024] The first conveying channel 7 is installed at the output end of the raw material bin 1, and a drum stirring device is installed at the end of the first conveying channel 7. The second conveying channel 8 is in communication between the input end of the transfer bin 5 and the output end of the drum stirring device. The third conveying channel 9 is in communication between the high-position bin 6 and the transfer bin 5, and the material gasification injection device is installed on the third conveying channel 9. The steelmaking device 11 is installed below the high-position bin 6. The first conveying channel 7, the second conveying channel 8 and the third conveying channel 9 are all closed channels.

[0025] In the operation process of the stainless steel dust conveying device, first, the stainless steel dust, carbon powder, silicon slag, silicon carbide powder, lime and other raw materials are added into the raw material bin 1. Then, the raw materials are conveyed to the drum stirring device through the closed first conveying channel 7. The drum stirring device is the core link in the whole process, which is responsible for fully stirring and mixing the raw materials to ensure that the various components in the raw materials are evenly mixed before entering the steelmaking device 11. After completing the stirring and mixing, the mixed raw materials are conveyed into the transfer bin 5 through another closed second conveying channel 8 for temporary storage. The transfer bin 5 as a buffer zone can ensure the continuity of the stainless steel dust conveying production process, and facilitate the management and deployment of the mixed and stirred output materials and the materials to be fed into the steelmaking device 11 for smelting. The materials in the transfer bin 5 are sent to the high-position bin 6 by the material gasification injection device. The high-position bin 6 is located directly above the steelmaking device 11, so that the materials can enter the steelmaking device 11 below by their own gravity, avoiding the entry of large-density material dust into the high-temperature steelmaking device 11. In the whole conveying process, only the raw material adding operation is performed at the raw material bin 1. In the subsequent first conveying channel 7, drum stirring device, second conveying channel 8, transfer bin 5, third conveying channel 9, high-position bin and steelmaking device 11, all materials are conveyed and processed in a completely closed space. It can effectively control the dust problem that may be generated during the conveying and stirring of stainless steel dust and auxiliary materials, thereby reducing the adverse effects of smoke dust on the surrounding environment and the health of operators during the production of stainless steel.

[0026] In one embodiment, the drum stirring device includes a drum screen 2 and a mixer 3, the first conveying channel 7 is in communication with the inlet of the drum screen 2, and the second conveying channel 8 is in communication with the output end of the mixer 3. The drum screen 2 is adapted to screen and convey the material particles with a particle size less than a predetermined size to the mixer 3. By screening the particle size of the material entering the mixer 3, the particle material with a particle size greater than the predetermined size is screened out, and the particle material mixture with a particle size less than the predetermined size is added to the mixer 3 for sufficient stirring and mixing. It ensures that only the material particles with a particle size less than the predetermined size are sent to the mixer 3 for mixing, avoiding the problem of uneven mixing or equipment damage caused by too large particles, improving the mixing efficiency and uniformity of the mixed material.

[0027] In one embodiment, the mixer 3 is fixedly installed below the drum screen 2. The material conveying process is simplified, so that the qualified particle size material screened out by the drum screen 2 can directly fall into the mixer 3 below, without the need for additional conveying equipment or transfer steps, thereby reducing the loss and energy consumption in the material transfer process, and improving the compactness of the overall equipment and the continuity of the material processing.

[0028] In one embodiment, the output end of the raw material bin 1 is located at the bottom, the input end of the drum mixing device is located at the top, and the first conveying channel 7 is a spiral conveying feeder. The raw material naturally falls to the bottom of the raw material bin 1 under the action of gravity, and after the spiral conveying feeder is started, the spiral blades inside it begin to rotate, gradually lifting the raw material from the bottom to the top and smoothly feeding it into the drum mixing device. This ensures the continuity of material transmission, avoids blockage problems caused by material accumulation, and improves production efficiency. At the same time, the first conveying channel 7 is a closed channel. Since the entire transmission process is carried out in a closed space, dust dispersion is reduced, the health of operating personnel is protected, and environmental pollution is reduced.

[0029] In one embodiment, the second conveying channel 8 is a powder pneumatic conveyor. The material after mixing is quickly and continuously conveyed to the next processing link by the powder pneumatic conveyor. During the conveying process, the material is suspended and pushed by the airflow, avoiding the wear and pollution that may occur in traditional mechanical conveying methods.

[0030] In one embodiment, a batching bin 4 is installed between the drum mixing device and the transfer bin 5, the output end of the second conveying channel 8 communicates with the batching bin 4, and the batching bin 4 communicates with the transfer bin 5 through an auxiliary channel 10. The material after mixing first enters the batching bin 4, where it is temporarily stored according to production requirements. Then, the material is conveyed to the transfer bin 5 through the auxiliary channel 10.

[0031] Further, the auxiliary channel 10 is provided with a material gasification injection device. The dust material is pumped twice by the two material gasification injection devices on the auxiliary channel 10 and the third conveying channel 9, using a two-stage conveying method, which can greatly reduce the energy consumption of pneumatic conveying and reduce the operating cost of the device. In the two-stage conveying method, the material first obtains initial kinetic energy and a suspended state through the first-stage material gasification injection device, and then continues to move in the auxiliary channel 10 and receives further acceleration and stabilization from the second-stage material gasification injection device. This ensures the stable suspension and efficient conveying of the material in the pipeline, and the synergistic effect of the two-stage injection can reduce energy consumption and cost. At the same time, since the entire conveying process is carried out in a closed space, dust dispersion and pollution problems are effectively reduced, providing a strong guarantee for the cleanliness and safety of the production environment.

[0032] The stainless steel dust and carbon powder, silicon slag, silicon carbide powder, lime are added into the raw material bin 1, and are uniformly screened by the roller screen 2 and stirred by the stirrer 3, and the mixture after uniform stirring is conveyed to the transfer bin 5 by using the gas conveying system, and then the mixture in the transfer bin 5 is conveyed to the high-level bin 6 on the furnace top platform by using the bin pump, and finally the material is put into the smelting furnace as the steelmaking equipment 11 through the high-level bin 6, so that the dust pollution of the stainless steel dust and auxiliary materials to the environment in the feeding process is solved. The stainless steel dust conveying device in the form of pneumatic closed conveying provided by the application conveys the stainless steel dust to the smelting furnace, including the following steps: material preparation: preparing stainless steel dust, carbon powder, silicon slag, silicon carbide powder and lime, all of which are dry powder materials; weighing: weighing the stainless steel dust, carbon powder, silicon slag, silicon carbide powder and lime according to the required weight; screening: screening the materials with particle size greater than 4mm through the roller screen 2; discharging: adding the mixture with particle size not greater than 4mm into the stirrer 3; stirring: uniformly stirring the stainless steel dust, carbon powder, silicon slag, silicon carbide powder and lime; conveying: conveying the uniformly stirred mixture to the transfer bin 5 by the bin pump, and then conveying the material to the high-level bin 6 on the furnace top by the bin pump of the transfer bin 5, wherein the bin pump is an air compressor gas bin pump, and the material is discharged through the horn discharge port; and the mixture in the high-level bin 6 on the furnace top is guided into the smelting furnace through the pipe.

[0033] The stainless steel dust conveying device adopts two-stage pneumatic conveying of the batching bin 4 and the transfer bin 5 for feeding, has high conveying efficiency, can realize continuous and efficient conveying of the stainless steel dust, carbon powder, silicon slag, silicon carbide powder and lime, and greatly improves the production efficiency. The stainless steel dust, carbon powder, silicon slag, silicon carbide powder and lime are conveyed in a fully sealed pipeline, effectively avoiding dust flying and leakage, and reducing environmental pollution. Since the conveying process and the stirring and screening process are carried out in a closed pipeline and equipment, no secondary pollution is generated.

[0034] According to the embodiment of the utility model, on the other hand, a kind of steelmaking system is also provided, including the stainless steel dust conveying device of the application.Stainless steel dust conveying device when running, after stainless steel dust and carbon powder, silicon slag, silicon carbide powder, lime and other raw materials are added to raw material bin 1, raw materials are collectively conveyed to drum stirring equipment by closed first conveying channel 7 and are stirred and mixed, after stirring and mixing are completed, the raw materials after mixing are conveyed to transfer bin 5 by second conveying channel 8, the material in transfer bin 5 is sent to high position bin 6 by material gasification injection equipment, and then into the lower steelmaking equipment 11 and smelted.In the conveying process, only raw materials are added at raw material bin 1, in subsequent first conveying channel 7, drum stirring equipment, second conveying channel 8, transfer bin 5, third conveying channel 9, high bin and steelmaking equipment 11, all are located in closed space, can greatly reduce the dust generated in the conveying and stirring process of stainless steel dust and auxiliary materials, to reduce the influence of smoke dust on environment and personnel in the process of stainless steel production.

[0035] Although the embodiments of the utility model are described in conjunction with the drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A stainless steel fly ash conveying device, characterized by, The application relates to a dust conveying device for stainless steel dust. The application relates to a dust conveying device for stainless steel dust. The application relates to a dust conveying device for stainless steel dust. The application relates to a dust conveying device for stainless steel dust. The application relates to a dust conveying device for stainless steel dust.

2. The stainless steel fly ash conveying device according to claim 1, characterized in that, The application relates to a dust conveying device for stainless steel dust.

3. The stainless steel fly ash conveying device according to claim 2, characterized in that, The application relates to a dust conveying device for stainless steel dust.

4. The stainless steel fly ash conveying device according to any one of claims 1 to 3, characterized in that The application relates to a dust conveying device for stainless steel dust.

5. The stainless steel fly ash conveying device according to any one of claims 1 to 3, characterized in that The application relates to a dust conveying device for stainless steel dust.

6. The stainless steel fly ash conveying device according to any one of claims 1 to 3, characterized in that The application relates to a dust conveying device for stainless steel dust.

7. The stainless steel fly ash conveying device according to claim 6, characterized in that, The application relates to a dust conveying device for stainless steel dust.

8. A steelmaking system, characterized by, The application relates to a dust conveying device for stainless steel dust. The application relates to a dust conveying device for stainless steel dust. The application relates to a dust conveying device for stainless steel dust. The application relates to a dust conveying device for stainless steel dust. The application relates to a dust conveying device for stainless steel dust. The application relates to a dust conveying device for stainless steel dust. The application relates to a dust conveying device for stainless steel dust. The application relates to a dust conveying device for stainless steel dust. The application relates to a dust conveying device for stainless steel dust. The application relates to a dust conveying device for stainless steel dust. The application relates to a dust conveying device for stainless steel dust. The application relates to a dust conveying device for stainless steel dust. 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