CN218502930U

CN218502930U - Steel slag fine aggregate processing production line

Info

Publication number: CN218502930U
Application number: CN202221607088.XU
Authority: CN
Inventors: 谭箭
Original assignee: Hunan Xingang Industrial Co ltd
Current assignee: Hunan Xingang Industrial Co ltd
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2023-02-21
Anticipated expiration: 2032-06-23

Abstract

The utility model discloses a steel slag fine aggregate processing production line, which comprises a storage bin, a vibrating feeder, a feeding conveyer belt, a hanging magnetic separator, an electromagnetic roller, a feeding conveyer belt, a first vibrating screen, a demagnetizing conveyer belt, a first double-roller magnetic separator, a screening conveyer belt, a probability screen, an aggregate conveyer belt and a feeding screw machine which are connected in sequence in the working procedure; the steel slag is fed to the feeding conveyer belt through the vibrating feeder after entering the storage bin, is sequentially screened by the hanging magnetic separator, the electromagnetic roller, the feeding conveyer belt and the first vibrating screen, is magnetically separated by the first double-roller magnetic separator, and enters the probability screen through the screening conveyer belt to obtain aggregates with different particle sizes. Adopt the utility model discloses a production line processing slag, the aggregate grain shape that obtains is good, the gradation proportion relation is continuous, relevant grade is incessant, can fully fill the space between the aggregate, and the powder content is extremely low, can reach the requirement that the road was built to pitch coarse aggregate, and it has the significance to the development of building the road to the highway.

Description

Slag fine aggregate processing production line

Technical Field

The utility model belongs to the technical field of slag processing production, specifically speaking, the utility model relates to a slag exquisite aggregate processing lines.

Background

The yield of steel slag in China is nearly 1 hundred million tons every year, the current utilization channel is narrow due to the reasons of unstable volume, high content of phosphorus and sulfur impurities, high grinding energy consumption and the like, the comprehensive utilization rate is low, the ground powder is generally adopted as a blending material to be added into steel slag cement, the blending amount is very small, and a large amount of steel slag can only be stacked to form industrial solid waste. The steel slag treatment process comprises a cold abandoning method, a disc water cooling method, a hot splashing method, a water quenching method, an air quenching method, a hot stuffiness method, a roller method, a pressurized steam aging method and the like. The cold-disposal method has long aging time, and the treated steel slag has large lumpiness and is not beneficial to the utilization and processing of the steel slag; the water cooling method by splashing water has high cost and large pollution; the water quenching and air quenching methods are easy to explode and are not beneficial to operation, and the methods are not popularized in a large scale at home and abroad.

At present, the common methods for treating the steel slag in China are a hot splashing method, a roller method and a hot stuffiness method. The cold disposal method is to pour the steel slag into a slag pot for slow cooling and then directly transport the slag to a slag yard for disposal, although the investment is small and the equipment is small, the process is not beneficial to the processing and reasonable utilization of the steel slag, and sometimes the steel making is affected due to unsmooth slag discharge. The hot splashing method is that after the steel-making slag is poured into a slag pot, the slag pot is transported to a slag hot splashing workshop by a vehicle, slag of the slag pot is poured on a slag bed layer by a crane, and when the temperature is reduced to 350-400 ℃ by air cooling, a proper amount of water is sprayed to rapidly cool and crack the steel slag; then the slag is transported to a waste slag yard or a steel slag treatment workshop for the process treatments such as crushing, screening, magnetic separation and the like. The hot splashing method needs large-scale loading excavating machinery, and has the disadvantages of large equipment loss, large occupied area, large dust crushing amount and large steel slag processing amount. The methods all can generate more waste materials, cannot realize full processing and utilization of the steel slag, and have low utilization rate of the steel slag.

In summary, there is a need to develop a steel slag fine aggregate processing production line to fully process and utilize steel slag, improve the economic value of steel slag, turn steel slag into wealth, and thoroughly solve the problem of environmental pollution caused by steel slag.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the steel slag fine aggregate processing production line is provided to realize full processing and utilization of steel slag, improve the economic value of the steel slag, change the steel slag into valuables and thoroughly solve the problem of environmental pollution caused by the steel slag.

In order to realize the purpose, the utility model discloses the technical scheme who takes does:

a steel slag fine aggregate processing production line comprises a storage bin, a vibrating feeder, a feeding conveyer belt, a hanging magnetic separator, an electromagnetic roller, a feeding conveyer belt, a first vibrating screen, a demagnetizing conveyer belt, a first double-roller magnetic separator, a screening conveyer belt, a probability screen, an aggregate conveyer belt and a feeding screw machine which are sequentially connected in the process; the steel slag enters the storage bin, is fed to the feeding conveyer belt through the vibrating feeder and is hung on the top side of the feeding conveyer belt, the hanging magnetic separator is used for sucking iron-containing particles in the steel slag to the surface, the steel slag passing through the hanging magnetic separator is then subjected to magnetic separation of the iron-containing materials through the electromagnetic roller, the steel slag passing through the feeding conveyer belt is conveyed to the first vibrating screen for screening, the screened steel slag passes through the demagnetizing conveyer belt and enters the first double-roller magnetic separator for magnetic separation, the steel slag passing through the screening conveyer belt after magnetic separation enters the probability screen for screening, steel slag aggregates with different particle sizes are respectively conveyed to a storage yard through the aggregate conveyer belt corresponding to each other, and the screened powdery materials are conveyed to a storage container through the feeding screw.

On the basis of the scheme, in another improved scheme, a crusher, a discharging conveyer belt and a second vibrating screen are sequentially arranged between the first vibrating screen and the demagnetizing conveyer belt, steel slag with the diameter smaller than or equal to the preset size enters the demagnetizing conveyer belt through an undersize conveyer belt after the first vibrating screen is screened, the steel slag with the diameter larger than or equal to the preset size enters the crusher to be crushed after the first vibrating screen is screened, the crushed steel slag enters the demagnetizing conveyer belt to be sieved again through the discharging conveyer belt, and the steel slag with the diameter smaller than or equal to the preset size after the second sieving is conveyed to the first double-roller magnetic separator to be magnetically separated through the demagnetizing conveyer belt.

On the basis of the scheme, in another improved scheme, a material returning conveying belt is further arranged between the second vibrating screen and the crusher, and after the second vibrating screen is sieved again, the steel slag with the diameter larger than or equal to the preset size is conveyed to the crusher through the material returning conveying belt to be crushed again.

On the basis of the scheme, in another improved scheme, a reshaping conveying belt and a reshaping machine are sequentially arranged between the first double-roller magnetic separator and the screening conveying belt, steel slag subjected to magnetic separation in the first double-roller magnetic separator is conveyed to the reshaping machine through the reshaping conveying belt, and the steel slag subjected to reshaping in the reshaping machine enters the probability screen through the screening conveying belt to be screened.

On the basis of the scheme, in another improved scheme, a re-magnetic separation conveying belt and a second double-roller magnetic separator are further arranged between the shaping machine and the screening conveying belt, steel slag shaped in the shaping machine enters the second double-roller magnetic separator through the re-magnetic separation conveying belt to be subjected to magnetic separation again, and then enters the probability screen through the screening conveying belt.

On the basis of the scheme, in another improved scheme, the dust collector further comprises a first dust collector and a spiral conveyor, wherein the first dust collector is used for sucking out dust in the probability sieve, and the spiral conveyor is used for conveying the sucked-out dust to a storage container.

On the basis of the scheme, in another improved scheme, the device further comprises a feeding screw machine, a lifting machine and a loading screw machine, wherein the feeding screw machine is used for conveying the dust screened in the probability screen to the lifting machine, the lifting machine is used for conveying the dust to the storage container, and the loading screw machine is used for loading and conveying the powdery material in the storage container.

On the basis of the scheme, in another improved scheme, the dust collector further comprises a closed box and a second dust remover, the first vibrating screen, the undersize conveyer belt, the crusher, the discharge conveyer belt, the return conveyer belt and the second vibrating screen are all located in the closed box, the second dust remover is arranged on the closed box, and the second dust remover is used for sucking out dust in the closed box.

On the basis of the scheme, in another modified scheme, including sieve tray, sieve case, steady feed bin, two-way cloth mechanism and vibrating mechanism, sieve case flexonics is in on the sieve tray, the gate valve is installed to steady feed bin's bottom opening part, vibrating mechanism is used for driving sieve case vibration, the one end of sieve case is the feed end, the other end is the discharge end, the inside from the top down of sieve case has set gradually at least two-layer screen cloth, the discharge end is provided with two at least row material chutes, every row material chute with the screen cloth one-to-one, two-way cloth mechanism includes two-way distributing device, power pack and two-way cloth baffle, two-way distributing device sets up gate valve with between the feed end of sieve case, power pack is used for driving the vibration of two-way distributing device, two-way distributing device's inside is provided with vertical division board, the division board will two-way distributing device's inside separates into two vertical baffle boxes, two-way cloth baffle sets up the top layer in the sieve incasement screen cloth top.

On the basis of the scheme, in another improved scheme, an air locking valve is arranged at each discharging chute, a dust suction port is formed in the top of the screen box, an air inlet is formed in the bottom of the screen box, and an air pipe of the first dust remover is connected with the dust suction port; the sieve pores of the sieve are rhombic sieve pores, and the length of the short axis of each rhombic sieve pore is 1.1-1.2 times of the granularity of the material to be screened.

The technical scheme of the utility model the beneficial technological effect who gains is:

the utility model discloses a slag fine-quality aggregate processing lines, with the slag through the magnetic separation, broken, plastic and the process such as screening process become the medium and fine aggregate and the ore concentrate powder of different diameters. The medium and fine aggregates of the steel slag have rough surface strength, good wear resistance, good anti-sliding performance, good durability, heavy volume, good stability, high temperature resistance, low temperature resistance and no cracking, and are firmly combined with the asphalt and have good adhesion. The fine aggregate processed by adopting the special physical stone crushing technology for the steel slag has good particle shape, continuous grading proportion relation and uninterrupted related particle size, can fully fill gaps among aggregates, has extremely low powder content, ensures that the surface of the fine aggregate particles obtained by screening is clean through a matched powder suction and air sweeping device, can meet the requirement of the asphalt road building coarse aggregate, can replace basalt, diabase and the like for paving, relieves the problem of lack of the asphalt road building coarse aggregate, reduces transitional development of natural resources, benefits future generations, is green and environment-friendly, reduces the road building cost, develops the steel slag as the road building coarse aggregate, can realize the regeneration and cyclic utilization of industrial solid wastes by changing waste into valuable, and has important significance for the development of road building.

Drawings

The accompanying drawings, which form a part of the present disclosure, are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and together with the description serve to explain the present disclosure.

FIG. 1 is a schematic view of a fine aggregate processing line for steel slag according to example 1;

FIG. 2 is a schematic view of a fine aggregate processing line for steel slag according to example 2;

FIG. 3 is a schematic view of a fine aggregate processing line for steel slag according to example 3;

FIG. 4 is a schematic view of a fine aggregate processing line for steel slag according to example 4;

FIG. 5 is a schematic view of a steel slag fine aggregate processing line in example 5 (a closed box is indicated by a dotted line frame);

FIG. 6 is a schematic view of a fine aggregate processing line for steel slag according to example 9;

FIG. 7 is a schematic view of the production process of the steel slag fine aggregate processing line in example 9.

Reference numerals are as follows:

1-stock bin 2-vibrating feeder 3-feeding conveyer belt

4-hanging magnet 5-electromagnetic roller 6-feeding conveyer belt

7-first vibrating screen 8-stabilizing hopper 9-cone crusher

10-second dust remover 11-undersize conveyer belt 12-second vibrating screen

13-returning material conveyer belt 14-discharging conveyer belt 14-demagnetizing separation conveyer belt

16-a first double-roller magnetic separator 17-a reshaping conveying belt 18-a slag iron conveying belt I

19-shaper 20-re-magnetic separation conveyer belt 21-second double-roller magnetic separator

22-slag iron conveying belt II 23-screening conveying belt 24-material stabilizing bin

25-double-channel distributor 26-screen box 27-first dust remover

28-feeding screw machine 29-aggregate finished product conveying belt 30-aggregate finished product

31-slag iron 32-probability sieve 33-powder tank

34-loading screw conveyor 35-screw conveyor 36-silencer

37-loading dust-settling device 38-elevator

Detailed Description

The present invention will be described in detail with reference to the drawings, which are provided for illustrative and explanatory purposes only and should not be construed as limiting the scope of the present invention in any way. Furthermore, those skilled in the art can combine features from the embodiments in this document and from different embodiments accordingly, based on the description in this document.

Example 1

Referring to the schematic illustration of fig. 1, the fine aggregate processing production line for steel slag in the embodiment includes a storage bin 1, a vibrating feeder 2, a feeding conveyer belt 3, a hanging magnetic separator, an electromagnetic roller 5, a feeding conveyer belt 6, a first vibrating screen 7, a demagnetizing conveyer belt 15, a first double-roller magnetic separator 16, a screening conveyer belt 23, a probability screen 32, an aggregate finished product conveyer belt 29 and a feeding screw machine 28, which are connected in sequence in the process; after steel slag enters a storage bin 1, the steel slag is fed to a feeding conveyer belt 6 through a vibrating feeder 2, a hanging magnetic separator suspended on the top side of the feeding conveyer belt 6 is used for sucking iron-containing particles in the steel slag out to the surface, the steel slag passing through the hanging magnetic separator is subjected to magnetic separation of the iron-containing materials through an electromagnetic roller 5, then the steel slag is conveyed to a first vibrating screen 7 through the feeding conveyer belt 6 for screening, the screened steel slag enters a first double-roller magnetic separator 16 through a demagnetizing conveyer belt 15 for magnetic separation, the steel slag after magnetic separation is subjected to screening through a screening conveyer belt 23 and then enters a probability screen 32 for screening, steel slag aggregate finished products 30 with different particle sizes after screening are respectively conveyed to a storage yard through corresponding aggregate finished product conveyer belts 29, the screened powdery materials are conveyed to a storage container through a feeding screw machine 28, a powder tank 33 is used as the storage container in the embodiment, and other containers or the powdery materials can be directly placed in a designated storage yard in other embodiments.

With continued reference to the schematic illustration of fig. 1, in a modification of the present embodiment, the probability screen 32 is further connected with a first dust separator 27, and the first dust separator 27 is connected with a screw conveyor 35. The first dust collector 27 is used for sucking out dust in the probability sieve 32, and the screw conveyor 35 conveys the dust to the powder tank 33. The first dust remover 27 is also provided with a muffler 36, which can reduce the influence of noise.

With reference to the schematic illustration of fig. 1, in the modified example of the present embodiment, a feeding screw 28, a lifting machine 38 and a loading screw 34 are further provided, the feeding screw 28 sends the dust sieved by the probability sieve 32 to the lifting machine 38, the lifting machine 38 sends the dust to the powder tank 33, and the loading screw 34 is used for loading and transporting the powdery material in the powder tank 33. The loading screw machine 34 is also provided with a loading dust-settling device 38, so that dust transmission during loading is reduced.

The steel slag selected in the embodiment is Hunan steel converter steel slag which comprises two types of hot stuffy slag and hot splashing slag, is subjected to primary breaking and primary magnetic separation, is conveyed to a processing site for an open storage period of more than six months, and is subjected to necessary inspection before processing, and each quality index of the steel slag meets the quality requirement and 4.8.3 specification requirement of 4.8.2 in the highway asphalt pavement construction technical specification of the Ministry of transportation. And when various detection indexes of the steel slag to be processed meet the standard requirements, the fine aggregate processing production line for the steel slag in the embodiment is adopted for processing. The steel slag has the main control indexes that the content of free calcium oxide is not more than 3 percent, the water immersion expansion is not more than 2 percent, the water content is controlled to be less than 3 percent, and the reasonable gradation of various specifications is ensured during processing.

The fine aggregate processing production line for steel slag in the embodiment is provided with two bins 1, and a vibrating feeder 2 is arranged below each bin 1. The steel slag to be processed which meets the requirements after detection is loaded into a storage bin 1 and is vibrated to fall down through a vibrating feeder 2; a hanging magnet 4 is arranged above the feeding conveyer belt 3, so that iron blocks in the steel slag are removed through magnet attraction, and iron slag 31 is removed through an electromagnetic roller 5; the steel slag after iron removal is vibrated by a first vibrating screen 7, and the diameter of the steel slag under the screen is less than or equal to the preset size (the preset size is 25mm in the embodiment); and conveying the steel slag to a first double-roller magnetic separator 16 through a demagnetizing conveyer belt 15 for magnetic separation, conveying the magnetically separated steel slag 31 to a steel slag storage yard through a first steel slag conveyer belt 18, and screening the magnetically separated steel slag in a probability screen 32. In other improved embodiments, manual impurity removal can be performed on the feeding conveyor belt 3, so that impurities are prevented from entering a subsequent processing link.

The probability sieve 32 in this embodiment is provided with 4 layers of screens, and can sieve the steel slag after magnetic separation into 4 aggregate finished products with different diameters, and the aggregate is used for road building of the road asphalt pavement. The medium and fine aggregates obtained by the processing production line of the fine aggregate of the steel slag of the embodiment have high strength, rough surface, good wear resistance, good skid resistance, good durability, large volume capacity, good stability, high temperature resistance, low temperature resistance, no cracking and good bonding and adhesion with asphalt; the processed fine aggregate has good grain shape, continuous grading proportion relation and uninterrupted related grain size, can fully fill gaps among aggregate finished products, has extremely low powder content, is matched with a powder suction air sweeping device to ensure that the particle surface is clean, and can meet the requirement of the coarse aggregate for asphalt road construction.

Each equipment that fine aggregate processing production line of slag in this embodiment involves has the product among the prior art for, adopts belt and motor as the conveyer belt between each equipment, does not give unnecessary detail here to the concrete structure and the theory of operation of each equipment and conveyer belt.

Example 2

Referring to the schematic illustration of fig. 2, the steel slag fine aggregate processing production line in the embodiment further comprises a step of steel slag shaping on the basis of the embodiment 1. A reshaping conveyor belt 17 and a reshaping machine 19 are sequentially arranged between the first double-roller magnetic separator 16 and the screening conveyor belt 23, steel slag subjected to magnetic separation from the first double-roller magnetic separator 16 is conveyed to the reshaping machine 19 through the reshaping conveyor belt 17, and steel slag subjected to reshaping from the reshaping machine 19 enters the probability screen 32 through the screening conveyor belt 23 for screening. Through the step of setting up the slag plastic, carry out the plastic with the slag after accomplishing the magnetic separation, irregular shape's slag gets into probability sieve 32 through the plastic and sieves, is difficult for blockking up the screen cloth, improves the efficiency of screening.

Example 3

Referring to the schematic illustration of fig. 3, the steel slag fine aggregate processing production line in the embodiment further comprises the steps of crushing the steel slag and performing secondary vibration screening after crushing on the steel slag on the basis of the embodiment 1. A crusher, a discharging conveyor belt 14 and a second vibrating screen 12 are further sequentially arranged between the first vibrating screen 7 and the demagnetizing conveyor belt 15, steel slag with the diameter smaller than or equal to a preset size after being screened by the first vibrating screen 7 enters the demagnetizing conveyor belt 15 through the undersize conveyor belt 11, steel slag with the diameter larger than or equal to the preset size after being screened by the first vibrating screen 7 enters the crusher to be crushed, the crushed steel slag enters the second vibrating screen 12 through the discharging conveyor belt 14 to be screened again, and the steel slag with the diameter smaller than or equal to the preset size after being screened again is conveyed to the first double-roller magnetic separator 16 through the demagnetizing conveyor belt 15 to be magnetically separated. In this embodiment, the cone crusher 9 for steel slag is adopted, and the large-particle steel slag is utilized by setting the steps of crushing and secondary vibration screening after crushing the steel slag, so that the utilization rate of the steel slag is improved.

Example 4

Referring to the schematic illustration of fig. 4, in the fine aggregate processing line for steel slag in this embodiment, on the basis of embodiment 3, a step of crushing the steel slag with large diameter again after the crushing and the secondary vibration screening is further added, a material returning conveyer belt 13 is further disposed between the second vibrating screen 12 and the crusher, and the steel slag with the size larger than the predetermined size after the secondary screening by the second vibrating screen 12 enters the crusher through the material returning conveyer belt 13 to be crushed again. Therefore, the large-particle steel slag is fully crushed, and the steel slag is fully utilized.

Example 5

Referring to the schematic diagram of fig. 5, in the production line for fine aggregate of steel slag in this embodiment, on the basis of embodiment 4, a closed box and a second dust remover 10 are further added, wherein the first vibrating screen 7, the undersize conveyer belt 11, the crusher, the discharging conveyer belt 14, the returning conveyer belt 13 and the second vibrating screen 12 are all arranged in the closed box, the second dust remover 10 is arranged at the top of the closed box, and an air suction port of the second dust remover 10 is communicated with the inside of the closed box. Therefore, the second dust remover 10 can absorb dust in the closed box when in work, so that the dust generated in the crushing process is prevented from polluting air, and the environment-friendly requirement is met.

Example 6

On the basis of the embodiment 2, the steel slag fine aggregate processing production line in the embodiment also adds the step of shaping the steel slag and then magnetically separating the shaped steel slag. And a re-magnetic separation conveyer belt 20 and a second double-roller magnetic separator 21 are also arranged between the shaping machine 19 and the screening conveyer belt 23, the steel slag shaped in the shaping machine 19 enters the second double-roller magnetic separator 21 through the re-magnetic separation conveyer belt 20 to be subjected to magnetic separation again, and then enters the probability screen 32 through the screening conveyer belt 23. By the arrangement, the scraps generated by the shaped steel slag are magnetically separated again, the scraps steel slag after the scrap iron 31 is separated can continue to enter the subsequent screening step of the probability screen 32, and the utilization rate of the steel slag is improved.

Example 7

The fine aggregate processing production line for steel slag in the embodiment is a combination of the embodiment 2 and the embodiment 4, that is, the steel slag entering the feeding conveyer belt 6 is crushed by the first vibrating screen 7, the crusher (the steel slag after being crushed once can be crushed again as required), the second vibrating screen 12 and then enters the first double-roller magnetic separator 16 for magnetic separation; the steel slag after magnetic separation from the first double-roller magnetic separator 16 is conveyed to the shaping machine 19 through the reshaping conveyer belt 17, and the steel slag after shaping from the shaping machine 19 enters the probability screen 32 through the screening conveyer belt 23 for screening. Therefore, the steel slag with large diameter is fully crushed into small particles, and the steel slag with irregular shape enters the probability sieve 32 for sieving after shaping, so that the sieve is not easy to block.

Example 8

The fine aggregate processing production line for steel slag in the embodiment is a combination of the embodiment 6 and the embodiment 7, that is, the steel slag entering the feeding conveyer belt 6 is crushed by the first vibrating screen 7 and the crusher (the steel slag after being crushed once can be crushed again as required), the second vibrating screen 12 and then enters the first double-roller magnetic separator 16 for magnetic separation; the steel slag after completing the magnetic separation from the first double-roller magnetic separator 16 is conveyed to the shaping machine 19 through the reshaping conveying belt 17, the shaped steel slag from the shaping machine 19 enters the second double-roller magnetic separator 21 through the re-magnetic separation conveying belt 20 for carrying out the magnetic separation again, and then enters the probability sieve 32 through the sieving conveying belt 23.

Example 9

The processing production line of the fine aggregate of the steel slag in the embodiment is the combination of the embodiment 5 and the embodiment 8. With reference to fig. 6 and fig. 7 (as the conveyer belts in this embodiment all adopt the structure of motor-driven belt, the process flow in fig. 7 all adopts the name of belt instead of conveyer belt to simplify the expression of characters in the process diagram), the process of processing steel slag in the fine aggregate processing production line of steel slag in this embodiment is briefly described:

steel slag is fed into a material bin 1 by a loader, a vibrating feeder 2 is arranged below the material bin 1, various impurities are removed from the steel slag through manual hand selection from the feeding conveyer belt 3 fed by the vibrating feeder 2, a hanging magnet 4 and an electromagnetic roller 5 are arranged on the front section of the feeding conveyer belt 3 to carry out magnetic separation on iron-containing materials (removing iron slag in the steel slag and preventing the iron slag from entering a crusher to damage a blade), the materials are conveyed to a first vibrating screen 7 through a feeding conveyer belt 6 to be screened, the materials larger than or equal to 25mm on a screen enter a special cone crusher 9 for the steel slag, and the materials smaller than or equal to 25mm below the screen are conveyed to another magnetic separation conveyer belt 15 through a screen lower conveyer belt 11 to carry out magnetic separation. The material on the upper layer of the separating screen enters the cone crusher 9, the discharging granularity of the discharging port is controlled and adjusted, the material is conveyed to the second vibrating screen 12 through the undersize conveyer belt 11 under the cone crusher 9 to be sieved, and the material with the diameter larger than 25mm returns to the upper material stabilizing hopper 8 of the cone crusher 9 through the return conveyer belt 13 to be crushed again. Materials with the size of less than or equal to 25mm below the sieve of the second vibrating screen 12 are gathered by the undersize conveyer belt 11 and materials under the sieve of the first vibrating screen 7 on the undersize conveyer belt 11 and are conveyed to the first double-roller double-magnetic separator together, and the rotating speed of the double magnetic rollers of the first double-roller magnetic separator 16 is adjusted for magnetic separation. And conveying the iron-containing materials discharged after magnetic separation to a storage yard, conveying the tailings subjected to magnetic separation by the first double-magnetic-roller magnetic separator to a special steel slag shaping machine 19 through a shaping conveying belt 17, conveying the shaped and processed steel slag to a second double-roller magnetic separator 21 through a magnetic separation conveying belt 20, and adjusting the rotating speed of the magnetic separator to perform sufficient magnetic separation. The iron-containing materials after magnetic separation are conveyed to a storage yard through a second slag iron conveying belt 22, and tailings after magnetic separation are conveyed to a material stabilizing bin 24 at the upper part of the high-efficiency probability sieve 32 through a screening conveying belt 23. The stable material bin is provided with a high-level material level instrument and a low-level material level instrument, the material level instrument sends a signal when the steel slag reaches the high level, the vibrating double-channel distributor 25 is arranged below the high-level stable material bin 24 to start linkage work, the material is conveyed to the screen box 26 of the high-efficiency probability screen 32 to be screened, and otherwise, the material level instrument sends a signal to stop feeding linkage work when the material reaches the low level. The feeding amount of the double-channel distributor 25 is properly adjusted according to the screening condition of the high-efficiency probability screen 32, and the double-channel distributor is adjusted to work in the optimal state. The high-efficiency probability sieve 32 can properly adjust the frequency according to the quality condition of the material screening so as to fully screen the material. The high-efficiency probability sieve 32 is matched with the first dust remover 27 to realize the functions of positive suction, back blowing and blockage prevention of the screen, and dust is collected into the first dust remover 27 and is concentrated and discharged into the corresponding powder tank 33 through the screw conveyer 35.

The high-efficiency probability sieve 32 in this embodiment is provided with 4 layers of sieve meshes, 4 kinds of medium and fine aggregate finished products 30 and one kind of powdery material below 0.3 mm are arranged under the sieve meshes, the 4 kinds of medium and fine aggregate finished products 30 are conveyed to a storage yard through an aggregate finished product conveyor belt 29, the powdery material below 0.3 mm is conveyed to a lifting machine 38 through a feeding screw machine 28, and the lifting machine 38 is conveyed into a corresponding powder tank 33 for storage. Two powder tanks 33 are arranged in the embodiment, the powder tanks 33 are matched with a loading dust-settling device 37, and the powder tanks are loaded at any time and transported out through a loading screw 34.

In the embodiment, a cone crusher 9 special for steel slag and a shaper 19 special for steel slag are adopted.

1) The special cone crusher 9 of slag absorbs current up-to-date technique to combine the required grain shape of slag physical characteristic and a section high performance cone crusher 9 of customization, be equipped with broken overload protection, can shield the iron plate and unload in an organic whole, upper portion is equipped with the ability size control of the 8 feed capacities of surge hopper, and even feed reaches the granularity size even, and the grain shape is good, reaches the requirement of primary processing material grain shape and size.

2) The special steel slag shaper 19 adopts a deep-cavity impeller, optimizes motion parameters, has a high-efficiency runner wheel, improves the passing rate, combines a high-performance wear-resistant throwing head, adopts 'stone beating', combines or replaces stone beating iron, and shapes and processes by combining the physical characteristics of steel slag, realizes vortex circulation in a cavity, has strong sealing performance, ensures that dust does not overflow and runs environment-friendly, ensures that the product has cubic uniform grain shape and reasonable gradation, meets the quality requirement of asphalt road aggregate, has extremely low needle sheet content, is suitable for the production of steel slag aggregate finished products, and is special steel slag shaping equipment.

The high-efficient probability sieve 32 of two-channel cloth in this embodiment includes the sieve tray, sieve case 26, material stabilizing bin 24, two-channel cloth mechanism and vibrating mechanism, sieve case 26 flexible connection is on the sieve tray, the gate valve is installed to material stabilizing bin 24's bottom opening part, vibrating mechanism is used for driving sieve case 26 vibration, sieve case 26's one end is the feed end, the other end is the discharge end, sieve case 26's inside from the top down has set gradually at least two-layer screen cloth, the discharge end is provided with two at least row material chutes, every row material chute and screen cloth one-to-one, two-channel cloth mechanism includes two-channel distributing device 25, power unit and two-channel cloth baffle, two-channel distributing device 25 sets up between the feed end of gate valve and sieve case 26, power unit is used for driving two-channel distributing device 25 vibration, two-channel distributing device 25's inside is provided with vertical division board, divide two-channel distributing device 25's inside into two vertical baffle boxes, two-channel cloth baffle sets up the top screen cloth top in sieve case 26. The vibrating mechanism comprises a vibrator and a vibrating motor, the vibrator is connected with an output shaft of the vibrating motor through a universal joint, the vibrating motor is fixed on the sieve base, and the vibrating motor is used for driving the vibrator to vibrate. The vibrating motor in this embodiment is inverter motor, and inverter motor provides power for the vibrator, and the small size high frequency vibration of vibrator for the small size high frequency vibration of screen cloth guarantees that the material is from the quick screening of each layer screen cloth. Each set of vibrator comprises two groups of vibration exciters. The matching two sets of four sets of vibration exciters, eccentric blocks with equal mass perform vibration realized by reverse synchronous rotation, the component forces of centrifugal force along the vibration direction are always superposed, and the component forces along the reverse direction are always mutually offset, so that a single vibration direction exciting force is formed, and the high-efficiency probability sieve 32 is driven to perform linear reciprocating motion, the probability sieve 32 completes the whole sieving process of materials by utilizing the self-synchronization principle of probability theory and non-forced connection, and the frequency conversion control of a special frequency conversion motor is adopted according to the small amplitude of 0.5-5m/m and the high frequency of 600-3000 times/min of the principle, and the frequency conversion is properly adjusted according to the quantity of the materials, the size change of particles, the quantity of powder and the dryness and humidity of the materials so as to achieve the purpose of optimally controlling the product quality.

In the utility model, the feed end of the middle screen box 26 is higher than the discharge end, four layers of screen meshes are obliquely arranged in the screen box 26 from top to bottom, the discharge end of each layer of screen mesh is provided with a corresponding discharge chute, and materials can be screened into four aggregate finished products 30 with different particle diameters and discharged from the corresponding discharge chutes in the working process; the gate valve adopts an electric control gate valve. Briefly introduce the workflow: firstly, a conveyor conveys materials with the water content controlled below 3% to a material stabilizing bin 24, when the materials in the material stabilizing bin 24 reach a higher position, an electric control gate valve is opened, and the materials are divided into two paths through a double-path distributor 25 and a double-path distribution partition plate and fall onto the topmost screen mesh in a screen box 26; then the vibration mechanism drives the sieve box 26 to perform linear vibration with small amplitude and high frequency, medium and fine-grained materials are rapidly scattered on the surface of the four layers of sieve meshes and move to the discharge end, and the materials with different grain diameters are discharged from the discharge chutes corresponding to the four layers of sieve meshes respectively, so that the materials are rapidly screened. The time required for the high-efficiency probability sieve 32 to sieve the materials is about 1/3 of that of the common probability sieve 32, and the processing capacity per unit area is about 5 times larger than that of the common probability sieve 32.

In the embodiment of the efficient probability sieve 32, the air inlet is arranged at the bottom of the sieve box 26, the air pipe of the first dust remover 27 is connected with the dust suction port, the air inlet pipe is arranged inside the sieve box 26, and the air inlet pipe is communicated with the air inlet. The air inlet is arranged at the bottom of the screen box 26 through a flange, and an adjusting butterfly valve for adjusting the air inlet amount is also arranged at the air inlet; the air quantity at the air inlet can be adjusted as required by arranging the adjusting butterfly valve, and the flowing effect of the air which is sucked and blown back in the screen box 26 is ensured. From steady feed bin 24 through probability sieve 32 to the whole set of system of bin outlet can both reach the purpose of lock wind, the low material level of steady feed bin 24 is not empty storehouse, the discharge end of probability sieve 32 is equipped with the lock wind valve and locks the wind, fully reach the requirement of inhaling the powder operation, both sides are equipped with the air-supply line in the middle of the four-layer net lower part of high-efficient probability sieve 32 in order to prevent that fine material and powder from blockking up the screen cloth, and can adjust the intake, reach the purpose of just inhaling the blowback, prevent that fine material and powder from blockking up the net, the screen cloth adopts diamond-shaped hole design to have anti-blocking effect, the effect is better, it does not contain the powder to reach the aggregate finished product. The air locking valve in the embodiment adopts a double-layer electric air locking flap valve, which belongs to the prior art, the structure of the air locking flap valve is not described in detail, and the air locking flap valve can play a role in preventing air leakage and short circuit of the screen box 26; the top of the screen box 26 is also provided with a dust cover; the high-efficiency probability sieve 32 is arranged in this way, and dust can not fly away in the working process. Ensuring that the screen box 26 forms an enclosed structure. Because the screen box 26 is of a surrounding closed structure, after the first dust remover 27 is opened, the air in the screen box 26 is sucked away, negative pressure is formed inside the screen box 26, so that the air in the screen box 26 enters the screen box 26 through the air inlet and the air inlet pipe, and a positive suction and back blowing air flow mode is formed inside the screen box 26. According to the relationship between the wind speed, the wind quantity, the size and the size of the particles which can be separated, the wind quantity and the wind speed can be adjusted, so that the materials are positively sucked and reversely blown away from the sieve pores by utilizing the characteristics of a positive suction and reverse blowing anti-blocking mechanism and a diamond-shaped hole sieve mesh in the screening process, the micro powder is stirred by the airflow and is synchronously sucked away from the micro powder suspended in the sieve box 26, and the micro powder is sucked into the first dust remover 27 together, thereby effectively solving the technical problem that the fine particles block the sieve mesh.

The included angle between the screen and the horizontal plane is 23-60 degrees. The moving speed of the material on the sieve surface with the large inclination angle is 3-4 times of the moving speed of the material on the common sieve surface in the prior art, the speed is obviously increased to thin the material layer on the sieve surface, and the material can more fully penetrate the sieve and prevent blockage by adopting the double-channel distributing device 25 to carry out double-channel distribution on the material entering the sieve and the rhombic screen to sieve, so that the sieving effect is better. The screen mesh of the screen mesh is a rhombic mesh, and the length of the short axis of the rhombic mesh is 1.1-1.2 times of the granularity of the materials to be screened. The screen is made of high-strength wear-resistant materials, has rigidity and elasticity, and does not rust; change ordinary square sieve mesh among the prior art into the rhombus sieve mesh, but the condition of the fine material jam screen cloth of greatly reduced, the minor axis of sieve mesh is about 1.2 times of required material granularity, can make the material pass through the sifter rapidly like this, reduces and blocks up.

Probability sieve 32 in this embodiment has set up two-way distributing device 25 for the material can divide into two parts and comparatively evenly spread out the surface to the first layer screen cloth after falling down from steady feed bin 24, then starts vibrating motor and drives each layer screen cloth vibration of sieve box 26 inside, thereby accomplishes the separation to the material of different particle sizes. The material layer shunt thinning of the material entering the screen by the double-channel material distribution mechanism is achieved, the time for rapidly passing through the screen by the centering and fine particle materials is shortened, and the more accurate technical effects of screening material particles in sufficient time and sorting particle size are achieved. The high-efficiency probability sieve 32 with double-path distribution can achieve adjustable and controllable product quality of the sieve, the medium and fine aggregate finished products have good sieving effect and reasonable gradation, no powder exists in the medium and fine aggregate finished products, the whole set of equipment is specially designed and customized for processing the medium and fine aggregates in the steel slag asphalt road building aggregate, the maintenance is convenient, the maintenance time is short, the equipment is high-efficiency and energy-saving, the steel slag aggregate finished products at all levels of the sieve can achieve no powder, the fine steel slag aggregate finished products can be achieved, the working environment is free of dust and low in noise, and the requirements of high efficiency, energy conservation and environmental protection can be achieved.

The fine aggregate processing production line for the steel slag in the embodiment is used for processing the steel slag, can obtain fine green environment-friendly steel slag, and processes fine coarse aggregate, the equipment is reasonable in matching, the magnetic separation iron is sufficient, the residual quantity is low, the crushing and shaping process is controllable, the powder removing effect is good, the equipment control is centralized in the control operation room, the process flow and the equipment running condition are displayed on a screen, the fine aggregate processing production line is orderly and reasonable, the fine aggregate processing production line can be controlled in a linkage mode and a single action mode, the degree of automation is high, no dust is generated during running, the products are stored in a finished product warehouse in a classified mode, the loading and transportation are convenient, the energy consumption is low, the running is reliable, and the fine aggregate finished product processing production line meeting the green environment-friendly requirements is achieved.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims

1. A steel slag fine aggregate processing production line is characterized by comprising a storage bin, a vibrating feeder, a feeding conveyer belt, a hanging magnetic separator, an electromagnetic roller, a feeding conveyer belt, a first vibrating screen, a demagnetizing conveyer belt, a first double-roller magnetic separator, a screening conveyer belt, a probability screen, an aggregate conveyer belt and a feeding screw machine which are sequentially connected in the process; the steel slag is fed to the feeding conveyer belt through the vibrating feeder after entering the storage bin, and the hanging magnetic separator hung on the top side of the feeding conveyer belt is used for sucking iron-containing particles in the steel slag out to the surface.

2. The steel slag fine aggregate processing production line according to claim 1, wherein a crusher, a discharge conveyor belt and a second vibrating screen are sequentially arranged between the first vibrating screen and the demagnetization conveyor belt, steel slag with the diameter smaller than or equal to a preset size after being screened by the first vibrating screen enters the demagnetization conveyor belt through an undersize conveyor belt, and steel slag with the diameter larger than or equal to the preset size after being screened by the first vibrating screen enters the crusher for crushing.

3. The steel slag fine aggregate processing production line of claim 2, wherein a material returning conveying belt is further arranged between the second vibrating screen and the crusher, and after the second vibrating screen is sieved again, the steel slag with the diameter larger than or equal to the preset size is conveyed to the crusher through the material returning conveying belt to be crushed again.

4. The steel slag fine aggregate processing production line according to any one of claims 1 to 3, wherein a reshaping conveyor belt and a reshaping machine are further sequentially arranged between the first double-roller magnetic separator and the screening conveyor belt.

5. The steel slag fine aggregate processing production line according to claim 4, wherein a re-magnetic separation conveyer belt and a second double-roller magnetic separator are further arranged between the shaping machine and the screening conveyer belt.

6. The steel slag fine aggregate processing production line of claim 4, further comprising a first dust remover for sucking out dust in the probability screen and a screw conveyor for conveying the sucked out dust to a storage container.

7. The steel slag fine aggregate processing production line according to claim 6, further comprising a feeding screw machine, a lifter and a loading screw machine, wherein the feeding screw machine sends the dust screened in the probability screen to the lifter, the lifter sends the dust to the storage container, and the loading screw machine is used for loading and transporting the powdery material in the storage container.

8. The steel slag fine aggregate processing production line of claim 3, further comprising a closed box and a second dust remover, wherein the first vibrating screen, the undersize conveyer belt, the crusher, the discharge conveyer belt, the return conveyer belt and the second vibrating screen are all located in the closed box, the second dust remover is arranged on the closed box, and the second dust remover is used for sucking out dust in the closed box.

9. The steel slag fine aggregate processing production line according to claim 6, wherein the probability sieve comprises a sieve base, a sieve box, a material stabilizing bin, a double-channel distributing mechanism and a vibrating mechanism, the sieve box is flexibly connected to the sieve base, a gate valve is installed at the bottom opening of the material stabilizing bin, the vibrating mechanism is used for driving the sieve box to vibrate, one end of the sieve box is a feeding end, and the other end of the sieve box is a discharging end, at least two layers of screens are sequentially arranged in the sieve box from top to bottom, the discharging end is provided with at least two discharging chutes, each discharging chute corresponds to one screen, the double-channel distributing mechanism comprises a double-channel distributor, a power unit and a double-channel distributing partition plate, the double-channel distributor is arranged between the gate valve and the feeding end of the sieve box, the power unit is used for driving the double-channel distributor to vibrate, the inside of the double-channel distributor is provided with a vertical guide chute, and the partition plate separates the inside of the double-channel distributor into two vertical guide chutes, and the double-channel distributing partition plate is arranged above the topmost screen in the sieve box.

10. The steel slag fine aggregate processing production line according to claim 9, wherein each discharge chute is provided with an air lock valve, the top of the sieve box is provided with a dust suction port, the bottom of the sieve box is provided with an air inlet, and an air pipe of the first dust remover is connected with the dust suction port; the sieve pores of the sieve are rhombic sieve pores, and the length of the short axis of each rhombic sieve pore is 1.1-1.2 times of the granularity of the material to be screened.