System for extracting metal from stainless steel slag

Abstract

The utility model discloses a system for extracting metal from stainless steel slag, which relates to the technical field of stainless steel slag extraction and comprises a surge bin, a magnetic separator is arranged at the bottom end of the surge bin, a steel slag pulverizer is arranged on one side of the magnetic separator, a steel slag conveyor is arranged on one side of the steel slag pulverizer, and the steel slag conveyor is communicated with the steel slag pulverizer. With the adoption of the structure, when in use, the electric furnace slag is conveyed from the surge bin to the steel slag pulverizer by the steel slag conveyor for primary pulverizing treatment, then pulverized materials discharged from the outlet of the steel slag pulverizer can be conveyed to the winnowing machine for winnowing, fine materials in the pulverized materials are pneumatically conveyed to the fine tailing bin, and the fine tailings are conveyed to the fine tailing bin. The residual coarse material is subjected to primary magnetic separation through the magnetic separator, the granular steel in the residual coarse material is conveyed into the granular steel bin, and the residual coarse material is conveyed back to the steel slag grinding machine again to be subjected to secondary circulating grinding and magnetic separation, so that the purpose of recycling valuable metals in the stainless steel slag to the maximum extent can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of stainless steel slag extraction, especially relates to a stainless steel slag metal extraction system. BACKGROUND

[0002] Stainless steel is a very important material in the industrial field, but about 30% of stainless steel slag is produced in the smelting process of stainless steel, the stainless steel slag contains oxides of calcium, silicon and other elements, and also contains valuable metals of iron, nickel, chromium and other elements, according to the production process of stainless steel, the stainless steel slag is divided into electric furnace slag and AOD slag, the molten electric furnace slag becomes blocky after cooling and can be broken into granular, the molten AOD slag will naturally powder after cooling to a certain temperature.

[0003] At present, the treatment of stainless steel slag in China generally adopts wet process, but there are still some deficiencies, the wet process of stainless steel slag is relatively complex, needs to invest in the construction of water treatment system, and the investment and operation cost is relatively high, the wet process of stainless steel slag will cause great waste of water resources and secondary pollution to water resources, the tailing obtained by the wet process of stainless steel slag has high water content and low activity, which seriously restricts the subsequent treatment and utilization, therefore, a dry treatment equipment for extracting valuable metals from stainless steel slag is designed, which can maximize the recycling of valuable metals in stainless steel slag, save resources for enterprises, widen the use of tailings, protect the environment and enhance social benefits. SUMMARY

[0004] In view of the problems in the background art, the utility model aims to provide a stainless steel slag metal extraction system to solve the problems in the background art.

[0005] The above technical purpose of the utility model is realized by the following technical scheme.

[0006] A stainless steel slag metal extraction system, comprising a buffer bin, a magnetic separator is arranged at the bottom end of the buffer bin, a steel slag pulverizer is arranged at one side of the magnetic separator, and a steel slag conveyor is arranged at one side of the steel slag pulverizer.

[0007] As a preferred technical scheme, the steel slag conveyor and the steel slag pulverizer are in communication with each other, an air separator is arranged at one side of the steel slag conveyor, and the air separator and the steel slag conveyor are in communication with each other.

[0008] As a preferred technical scheme, an air separator is arranged at one side of the air separator, the air separator and the air separator are in communication with each other, and a granular steel bin is arranged at the bottom end of the magnetic separator.

[0009] As a preferred technical scheme, a coarse tailing bin is arranged at the bottom end of the fine tailing bin, a fine powder bin is arranged at the bottom end of the fine tailing bin, and the coarse tailing bin is arranged at one side close to the fine powder bin.

[0010] The bottom end of the fine tailing bin is provided with a coarse tailing bin.

[0011] The bottom end of the fine tailing bin is provided with a fine powder bin, and the coarse tailing bin is located at a side close to the fine powder bin.

[0012] In summary, the utility model mainly has the following beneficial effects:

[0013] First, when using, the electric furnace slag is conveyed from the buffer bin to the steel slag conveying machine and then to the steel slag grinding machine for primary grinding treatment, and the ground material from the outlet of the steel slag grinding machine can be conveyed to the air separator for air separation, the fine material is conveyed to the fine tailing bin by air force, the remaining coarse material is subjected to primary magnetic separation by the magnetic separator, the granular steel is conveyed to the granular steel bin, the remaining coarse material is conveyed back to the steel slag grinding machine for secondary grinding and magnetic separation, thereby achieving the purpose of maximum recycling of valuable metals in the stainless steel slag.

[0014] Second, when the steel slag is in the air separator, different airflow speeds and gravity characteristics of the steel slag are used to effectively separate steel slag particles of different qualities, under the action of the airflow, the light powder is easily separated by the airflow, thereby being conveyed into the fine tailing bin by air force, and the heavy steel slag is settled to the bottom of the settling chamber under the action of gravity, under the action of the rotating movement of the drum, the steel slag is further separated according to weight, the light steel slag is thrown out, and the heavy steel slag remains in the drum, the air separator has the advantages of simple structure, convenient operation, easy maintenance, low energy consumption, good separation effect, etc., especially when a large amount of material is processed, the air separator can efficiently separate materials of different particle sizes, improve production efficiency, and at the same time, the use of the tailing can be widened to achieve the effect of protecting the environment. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Reference signs: 1, buffer bin; 2, magnetic separator; 3, steel slag grinding machine; 4, steel slag conveying machine; 5, air separator; 6, fine tailing bin; 7, fine powder bin; 8, coarse tailing bin; 9, granular steel bin. DETAILED DESCRIPTION

[0017] EMBODIMENT

[0018] REFERENCE Figure 1The embodiment of the system for extracting metal from stainless steel slag includes a buffer bin 1, the bottom end of the buffer bin 1 is provided with a magnetic separator 2, one side of the magnetic separator 2 is provided with a steel slag pulverizer 3, one side of the steel slag pulverizer 3 is provided with a steel slag conveyor 4, the electric furnace slag and the AOD slag are respectively subjected to the air separation and magnetic separation process by adopting the magnetic enhancement measures, the steel slag treatment process of the stainless steel production enterprise is optimized, the valuable metals of the electric furnace slag and the AOD slag are recycled and utilized to the maximum extent, the use of the tail slag is widened, and the saving, environmental protection and efficient production of the stainless steel production enterprise are realized. In use, the dry steel slag is pulverized by the steel slag pulverizer 3, the pulverized steel slag is conveyed into the air separator 5 by the bucket elevator arranged in the steel slag pulverizer 3, the air separator 5 is provided with a centrifugal fan, the centrifugal fan can generate strong airflow, the steel slag is subjected to effective separation according to different airflow speeds and gravity characteristics of the steel slag in the air separator 5, under the action of the airflow, the light powder is separated and carried by the airflow, and then the light powder is further conveyed into the fine tail slag bin 6 by the air force, or the rotary drum separation unit is provided, the light steel slag is thrown out under the action of the rotary motion of the drum body, the heavy steel slag remains in the drum, the steel slag is screened by the air separator 5, different particle categories are screened out, the iron is further selected by the magnetic separator 2, and the subsequent treatment process is entered.

[0019] Reference Figure 1 The steel slag conveyor 4 and the steel slag pulverizer 3 are in communication with each other, one side of the steel slag conveyor 4 is provided with the air separator 5, the air separator 5 and the steel slag conveyor 4 are in communication with each other, the fine material screened by the vibrating screen is conveyed to the fine tail slag bin 6 by the air force, the coarse material screened by the vibrating screen is conveyed to the steel slag pulverizer 3 to be subjected to primary pulverization treatment, the pulverized material discharged from the steel slag pulverizer 3 enters the bucket elevator, and then enters the air separator 5 to be subjected to air separation, the fine material in the air separator 5 is conveyed to the fine tail slag bin 6 by the air force, the coarse material separated by the air separator 5 is conveyed to the coarse tail slag bin 8 by the belt conveyor, the magnetic separator 2 is used to select iron during the conveying process, the selected fine powder is conveyed to the fine powder bin 7 by the belt conveyor, the remaining coarse material of the air separator 5 is subjected to magnetic separation by the magnetic separator 2, the steel particles in the magnetic separator 2 are conveyed to the steel particle bin 9 by the belt conveyor, and the remaining coarse material is conveyed back to the rod mill to be subjected to secondary cycle pulverization and magnetic separation.

[0020] Reference Figure 1, one side of the air separator 5 is provided with a fine tailings bin 6, the fine tailings bin 6 and the air separator 5 are communicated with each other, the bottom end of the magnetic separator 2 is provided with a granular steel bin 9, the air separator 5 is provided with a centrifugal fan, which can generate strong airflow, the steel slag is in the air separator 5, through different airflow velocities and gravity characteristics of the steel slag, the steel slag particles of different qualities are effectively separated, under the action of the airflow, the light powder is easily separated by the airflow, thereby further being transported into the fine tailings bin 6 by the air force, and the heavy steel slag is settled to the bottom settling chamber under the action of gravity, or, a rotating drum separation unit is provided, under the action of the rotating movement of the drum body, the steel slag is further separated according to the weight, the light steel slag is thrown out, and the heavy steel slag remains in the drum, the air separator 5 has the advantages of simple structure, convenient operation, easy maintenance, low energy consumption and good separation effect, especially when a large amount of material is processed, the air separator 5 can efficiently separate materials of different particle sizes, and the production efficiency is improved.

[0021] Reference Figure 1 , the bottom end of the fine tailings bin 6 is provided with a coarse tailings bin 8, the bottom end of the fine tailings bin 6 is provided with a fine powder bin 7, and the coarse tailings bin 8 is located on one side close to the fine powder bin 7, due to the existence of the coarse tailings bin 8, the coarse raw materials can be processed, which is beneficial to the processing of coarse and fine raw materials, and can also avoid damage of the coarse raw materials to the inside of the fine tailings bin 6.

[0022] Principle and advantages: when in use, the dry steel slag is ground by the steel slag grinding mill 3, the ground steel slag is transported into the air separator 5 by the bucket elevator arranged inside, the air separator 5 is provided with a centrifugal fan, which can generate strong airflow, the steel slag is in the air separator 5, through different airflow velocities and gravity characteristics of the steel slag, the steel slag particles of different qualities are effectively separated, under the action of the airflow, the light powder is easily separated by the airflow, thereby further being transported into the fine tailings bin 6 by the air force, and the heavy steel slag is settled to the bottom settling chamber under the action of gravity, or, a rotating drum separation unit is provided, under the action of the rotating movement of the drum body, the steel slag is further separated according to the weight, the light steel slag is thrown out, and the heavy steel slag remains in the drum, the steel slag is screened by the air separator 5, according to the different particle categories screened, the iron is further selected by the magnetic separator 2, and enters the subsequent processing process, due to the existence of the coarse tailings bin 8, the coarse raw materials can be processed, which is beneficial to the processing of coarse and fine raw materials, and can also avoid damage of the coarse raw materials to the inside of the fine tailings bin 6.

Claims

1. A metal extraction system for stainless steel slag, comprising a buffer tank (1), characterized in that: The bottom of the buffer chamber (1) is equipped with a magnetic separator (2), a steel slag grinding mill (3) is provided on one side of the magnetic separator (2), and a steel slag conveyor (4) is provided on one side of the steel slag grinding mill (3).

2. The stainless steel slag metal extraction system according to claim 1, characterized in that: The steel slag conveyor (4) is connected to the steel slag grinding mill (3), and an air classifier (5) is provided on one side of the steel slag conveyor (4). The air classifier (5) is connected to the steel slag conveyor (4).

3. The stainless steel slag metal extraction system according to claim 2, characterized in that: The air separator (5) has a fine tailings bin (6) on one side, and the fine tailings bin (6) is connected to the air separator (5). The magnetic separator (2) has a steel pellet bin (9) at its bottom.

4. A metal extraction system for stainless steel slag according to claim 3, characterized in that: The bottom end of the fine tailings bin (6) is provided with a coarse tailings bin (8).

5. A metal extraction system for stainless steel slag according to claim 4, characterized in that: The bottom end of the fine tailings bin (6) is provided with a fine powder bin (7), and the coarse tailings bin (8) is located on the side close to the fine powder bin (7).

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