CN112934378A - Preparation system for producing building material products by gradient utilization of hot stuffy steel slag - Google Patents

Preparation system for producing building material products by gradient utilization of hot stuffy steel slag Download PDF

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Publication number
CN112934378A
CN112934378A CN202110117124.8A CN202110117124A CN112934378A CN 112934378 A CN112934378 A CN 112934378A CN 202110117124 A CN202110117124 A CN 202110117124A CN 112934378 A CN112934378 A CN 112934378A
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China
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steel slag
hot
building material
fine powder
vertical mill
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CN202110117124.8A
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CN112934378B (en
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杜鑫
聂文海
何小龙
刘畅
徐达融
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Tianjin Cement Industry Design and Research Institute Co Ltd
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Tianjin Cement Industry Design and Research Institute Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/16—Magnetic separation acting directly on the substance being separated with material carriers in the form of belts
    • B03C1/22—Magnetic separation acting directly on the substance being separated with material carriers in the form of belts with non-movable magnets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention belongs to the technical field of building material metallurgy, and particularly relates to a preparation system for producing building material products by utilizing hot disintegrating steel slag in a gradient manner. The invention provides a preparation system for producing building material products by gradient utilization of hot disintegrating steel slag, which utilizes the hot disintegrating steel slag in a grading way according to the characteristics of the raw materials of the hot disintegrating steel slag, prepares easily ground components into micro powder, and prepares difficultly ground components into coarse aggregate and fine aggregate, thereby saving the production energy consumption, reducing the production cost, diversifying the product types and meeting the requirements of different customers.

Description

Preparation system for producing building material products by gradient utilization of hot stuffy steel slag
Technical Field
The invention belongs to the technical field of building material metallurgy, and particularly relates to a preparation system for producing building material products by gradient utilization of hot disintegrating steel slag.
Background
The prior art and the defects are as follows:
the steel slag is a byproduct in the steel making process and is about 10 to 15 percent of the yield of the crude steel. The steel slag has complicated and variable components, and the main reason is that the steel-making furnaces have different furnace types and different steel-making process flows, and even the steel slag of different furnaces in the same steel-making plant has great difference in chemical components. The main treatment process of the steel slag comprises the following steps: hot sealing, hot spraying, disc spraying, water quenching, air quenching, roller method, granulation wheel method, etc.
The main chemical components of the steel slag are CaO and SiO2、Al2O3、FeO、Fe2O3、MgO、TiO2、K2O、Na2O、SO3、Cl、MnO、P2O5And the like. The main mineral in steel slag is tricalcium silicate (C)3S), dicalcium silicate (C)2S), dicalcium ferrite (C)2F) Fayalite (CFS), RO phase (Mg)2+、Fe2+、Mn2+Solid solution of (2), f-CaO, f-MgO, magnesium multiflower rose pyroxene (C)3MS2) Spinel (FeO. Al)2O3). The steel slag with low alkalinity is black, light in weight and more in pores; the steel slag with high alkalinity is black gray, grey brown, grey white, hard and dense. The steel slag block is loose, non-adhesive, hard and compact in texture, low in porosity and poor in grindability.
At present, the utilization rate of steel slag in China is low, most of the steel slag is piled up untreated, the surrounding environment is polluted, and a large amount of resources are wasted. The key reason that the steel slag is not recycled in a large scale is that the steel slag is poor in grindability and high in production cost; the activity is low, and the use amount in cement concrete is limited; the steel slag contains dead burnt CaO and MgO, which may cause poor stability, but the hot stuffy steel slag is obtained by pouring hot steel slag discharged from a steel ladle into a hot stuffy pit, adding water and keeping a certain pressure, so that iron and slag in the steel slag are effectively separated, and the dead burnt CaO and MgO are digested in advance, so that the hot stuffy steel slag does not have a stable potential risk.
According to the research of the prior art, the thermal smoldering steel slag can effectively decompose CaO and MgO which are dead burned in the steel slag, so that the stability of the steel slag in the later application process is prevented from being stable. From the application prospect, the utilization mode with large scale consumption of the solid waste of the steel slag and prospect is to prepare the steel slag into building material products, such as road engineering, cement admixture, concrete admixture, building product production and the like.
The patent "a method for preparing steel slag sand, activated slag powder and RO phase from steel slag CN 201410785730.7" provides a method for preparing steel slag sand, activated slag powder and RO phase from steel slag, comprising the following steps:
(1) steel slag grinding pretreatment: adding an activation modifier into the steel slag, wherein the dosage of the activation modifier is 0.05-8.0% of the mass of the steel slag, crushing, screening and deironing the steel slag, returning and crushing coarse granules with the particle size of more than or equal to 10mm, and sending fine granules with the particle size of less than 10mm to the next step for treatment;
(2) dissociative grinding: dissociative grinding the fine particle material which contains the activation modifier and has the particle size less than 10mm and mainly comprises steel slag to obtain a material with the particle size of 1-2000 mu m;
(3) separating activated slag powder and steel slag sand: sorting and screening the materials ground in the step (2), and separating the materials into materials with the particle size less than 80 microns, namely activated slag powder and sand with the particle size more than or equal to 80 microns, and removing iron from the sand with the particle size more than or equal to 80 microns to obtain steel slag sand;
(4) and (3) RO phase extraction: and (2) periodically stopping, throwing, grinding and screening the mixture of the RO phase material and the steel particles which are deposited and enriched in the equipment during the steel slag grinding pretreatment in the step (1) and the steel slag grinding in the step (2), removing iron to obtain powder material enriched in the RO phase, purifying the powder material enriched in the RO phase to obtain the RO phase, wherein impurities separated in the process of purifying the RO phase are activated slag powder.
The main drawbacks of this technique are: an activation modifier is added in the grinding pretreatment process of the steel slag, the modifier is attached to the surface of large particles, the loss rate is very high, the effective action is weak, and the usability in the actual production is poor; secondly, the fine particle materials are subjected to dissociative grinding to be 1-2000 mu m, all the materials are ground in the dissociating process, the production energy consumption is high, the production cost is high, the steel slag particles which are not subjected to hot stuffy treatment possibly contain dead-burned CaO and MgO, and the risk of poor stability exists in the subsequent application process; the RO phase extraction only screens and purifies materials deposited by the grinding equipment, a large amount of RO-phase-rich particles are ground in the dissociation process, and a large amount of energy is consumed.
The patent "steel slag sand cascade production and grading application method CN 109809718A" provides a steel slag sand cascade production and grading application method, which comprises a pretreatment process, a drying process, a primary production process, a secondary production process, a finish machining process and an iron removal process, wherein: the pretreatment procedure comprises the steps of crushing and screening the steel slag raw material for the first time to obtain steel slag sand fine aggregate; the drying procedure adopts a dryer to dry, so as to obtain a dry material of the steel slag sand; the primary production process is to carry out secondary screening and primary negative pressure dust collection treatment to obtain coarse sand; the second-stage production procedure is to carry out third screening and second negative pressure dust collection treatment on the coarse-grade sand to obtain first-stage sand; the fine processing procedure is to perform fine processing and grinding on the primary sand to obtain fine sand; the iron removal process is to arrange a plurality of sets of electromagnetic iron removal devices to remove iron from the steel slag sand.
The technology only obtains three steel slag sand products with different fineness moduli and suitable for different purposes by adopting a 'cascade production process', the steel slag materials have high iron content and complex components and are easy to generate rust, active components in the steel slag can not effectively play a role, and steel slag particles which are not subjected to hot stuffiness treatment possibly contain dead-burned CaO and MgO, so that the risk of poor stability exists in the subsequent application process.
Therefore, the resource utilization of the steel slag is imperative, a large-scale treatment and resource utilization mode is urgently needed, and the problems of poor grindability, low activity, high production cost and resource utilization degree of the steel slag are solved.
The difficulty and significance for solving the technical problems are as follows:
therefore, based on the problems of poor grindability, low activity, high production cost and resource utilization degree of the existing steel slag, the preparation system for producing the building material product by gradient utilization of the hot disintegrating steel slag, which has the advantages of saving production energy consumption, reducing production cost, diversifying product types and meeting the requirements of different customers, is provided for utilizing the hot disintegrating steel slag in a grading manner, preparing the components which are easy to grind into micro powder and preparing the components which are difficult to grind into coarse aggregate and fine aggregate according to the raw material characteristics of the hot disintegrating steel slag, and has important practical significance.
Disclosure of Invention
The invention aims to provide a preparation system for producing building material products by gradient utilization of hot disintegrating steel slag, which can utilize the hot disintegrating steel slag in a grading way according to the characteristics of the raw materials of the hot disintegrating steel slag, prepare the components which are easy to grind into micro powder, and prepare the components which are difficult to grind into coarse aggregate and fine aggregate, thereby saving the production energy consumption, reducing the production cost, realizing diversified product types and meeting the requirements of different customers.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows:
a preparation system for producing building material products by utilizing hot disintegrating steel slag in a gradient manner comprises a raw material bin, a suspended iron remover A, a conveying reamer, a steel slag vertical mill, a suspended iron remover B, a built-in conveying reamer, a lifter A, a magnetic separator, a vibrating screen, a hot blast stove, a cyclone cylinder, a ball mill, a conveying chute, a lifter B, a micro-powder bin, a circulating fan, a dust collector A, a dust collecting fan A, a chimney, a dust collector B and a dust collecting fan B, wherein the raw material bin is connected with the steel slag vertical mill through the conveying reamer, the suspended iron remover A is arranged between the raw material bin and the steel slag vertical mill, a grinding disc, a grinding roller and a powder selecting component are arranged in the steel slag vertical mill, fine powder passing through the powder selecting component is collected by the cyclone cylinder, fine aggregate beaten by the powder selecting component is conveyed out of the steel slag vertical mill through the built-in conveying reamer, the coarse aggregate escaping from the grinding disc under the action of centrifugal force enters an air ring and is discharged outside the steel slag vertical mill through a conveying belt, a suspended iron remover B is arranged at the upper part of the conveying belt for removing iron, the fine aggregate and the coarse aggregate enter a magnetic separator through a lifting machine A, and the material after iron removal through the magnetic separator enters a vibrating screen; after the gas separated by the cyclone cylinder passes through a circulating fan, returning one part of the gas to the steel slag vertical mill again, allowing the other part of the gas to enter a dust collector A for dust removal and purification, discharging the purified gas into air through a dust collection fan A and a chimney, allowing fine powder separated by the cyclone cylinder to enter a ball mill, carrying part of fine powder by wind of the ball mill, removing dust by a dust collector B, and discharging the fine powder into the air through a dust collection fan B; and the other part of the fine powder discharged by the ball mill, the fine powder collected by the dust collector A and the fine powder collected by the dust collector B enter a fine powder bin through a conveying chute and a lifter B.
A preparation system for producing building material products by utilizing hot disintegrating steel slag in a gradient manner is characterized in that the steel slag is utilized in a gradient manner according to the grindability of different components in the hot disintegrating steel slag, the grindable components are ground into micro powder, and the grindable components are used for preparing coarse aggregate and fine aggregate according to the particle size. Because the energy consumption for grinding the easily ground components is low, the production cost for further grinding is low, and the activity of the micro powder is increased after grinding, the easily ground components are ground; the components difficult to grind consume more energy and have poor activity when being ground, so the parts difficult to grind are kept into particles and are used as coarse and fine aggregate building material products after being deironized and screened.
The invention can also adopt the following technical scheme:
in the above system for producing building material products by gradient utilization of hot and stuffy steel slag, further, the hot blast stove provides hot air for drying the steel slag, a cold air valve is arranged at an outlet of the hot blast stove, the air enters the steel slag vertical mill and then carries the materials to move upwards from the millstone, and the temperature of the air at the outlet of the steel slag vertical mill is more than or equal to 90 ℃.
In the preparation system for producing building material products by utilizing hot smoldering steel slag in a gradient manner, further, the fine powder is ground to be more than or equal to 600m in a ball mill2/kg。
In the above preparation system for producing building material products by gradient utilization of hot smoldering steel slag, further, an activator adding device is arranged on the conveying chute.
In the preparation system for producing building material products by utilizing the hot stuffy steel slag in a gradient manner, fine aggregate is arranged below the screen of the vibrating screen, and coarse aggregate is arranged above the screen of the vibrating screen.
In the preparation system for producing building material products by utilizing the hot stuffy steel slag in a gradient manner, the coarse aggregate is further conveyed to the steel slag vertical mill by the conveying device to be ground until all materials become micro-fine powder and fine aggregate.
The hot disintegrating steel slag gradient utilization production technology is characterized in that according to the difference of grindability of different mineral phases in the hot disintegrating steel slag, easily-ground materials are ground, and difficultly-ground materials are kept to be granular, and the steel slag is utilized in a gradient mode to produce fine powder, fine aggregate and coarse aggregate, or to produce fine powder and fine aggregate.
In conclusion, the invention has the following advantages and positive effects:
1. according to the invention, the hot disintegrating steel slag is utilized in a grading way according to the characteristics of the raw materials of the hot disintegrating steel slag, the components which are easy to grind are prepared into micro powder, and the components which are difficult to grind are prepared into coarse aggregate and fine aggregate, so that the production energy consumption is saved, the production cost is reduced, the product types are diversified, and the requirements of different customers can be met.
2. The refined materials ground by the vertical mill are collected by the cyclone, part of the gas containing heat is recycled, and part of the gas is purified and exhausted by the dust collector dust remover, so that the specification of the dust collector can be effectively reduced, and the investment cost is reduced.
3. After the ball mill is used for secondary grinding, the specific surface area of the micro powder is more than or equal to 600m2And/kg, the activity of the micro powder is improved, the adding proportion of the micro powder in the cement concrete is increased, and the popularization and the application of saving resources and recycling steel slag are facilitated.
4. The proportion of the coarse aggregate, the fine aggregate and the micro powder can be flexibly adjusted through the grinding pressure, the opening degree of the fan and the opening degree of the powder concentrator, so that the market demand is met, and the economic benefit of enterprises is improved.
Drawings
The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus do not limit the scope of the present invention. Furthermore, unless otherwise indicated, the drawings are intended to be illustrative of the structural configurations described herein and are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
In the figure:
1. a raw material bin 2, suspension type iron removers A and 3, a conveying reamer 4, a steel slag vertical mill 5, suspension type iron removers B and 6, a built-in conveying reamer 7, elevators A and 8 and a magnetic separator; 9. the device comprises a vibrating screen, 10 parts, a hot blast stove, 11 parts, a cyclone cylinder, 12 parts, a ball mill, 13 parts, a conveying chute, 14 parts, a hoister B, 15 parts, a micro powder bin, 16 parts, a circulating fan, 17 parts, dust collectors A, 18 parts, dust collecting fans A, 19 parts, a chimney, 20 parts, dust collectors B, 21 parts, dust collecting fans B, 22 parts and an exciting agent adding device.
Detailed Description
The present invention will be specifically described with reference to fig. 1.
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
the first embodiment is as follows:
a preparation system for producing building material products by utilizing hot disintegrating steel slag in a gradient manner comprises a raw material bin, a suspended iron remover A, a conveying reamer, a steel slag vertical mill, a suspended iron remover B, a built-in conveying reamer, a lifter A, a magnetic separator, a vibrating screen, a hot blast stove, a cyclone cylinder, a ball mill, a conveying chute, a lifter B, a micro-powder bin, a circulating fan, a dust collector A, a dust collecting fan A, a chimney, a dust collector B and a dust collecting fan B, wherein the raw material bin is connected with the steel slag vertical mill through the conveying reamer, the suspended iron remover A is arranged between the raw material bin and the steel slag vertical mill, a grinding disc, a grinding roller and a powder selecting component are arranged in the steel slag vertical mill, fine powder passing through the powder selecting component is collected by the cyclone cylinder, fine aggregate beaten by the powder selecting component is conveyed out of the steel slag vertical mill through the built-in conveying reamer, the coarse aggregate escaping from the grinding disc under the action of centrifugal force enters an air ring and is discharged outside the steel slag vertical mill through a conveying belt, a suspended iron remover B is arranged at the upper part of the conveying belt for removing iron, the fine aggregate and the coarse aggregate enter a magnetic separator through a lifting machine A, and the material after iron removal through the magnetic separator enters a vibrating screen; after the gas separated by the cyclone cylinder passes through a circulating fan, returning one part of the gas to the steel slag vertical mill again, allowing the other part of the gas to enter a dust collector A for dust removal and purification, discharging the purified gas into air through a dust collection fan A and a chimney, allowing fine powder separated by the cyclone cylinder to enter a ball mill, carrying part of fine powder by wind of the ball mill, removing dust by a dust collector B, and discharging the fine powder into the air through a dust collection fan B; and the other part of the fine powder discharged by the ball mill, the fine powder collected by the dust collector A and the fine powder collected by the dust collector B enter a fine powder bin through a conveying chute and a lifter B.
A preparation system for producing building material products by utilizing hot disintegrating steel slag in a gradient manner is characterized in that the steel slag is utilized in a gradient manner according to the grindability of different components in the hot disintegrating steel slag, the grindable components are ground into micro powder, and the grindable components are used for preparing coarse aggregate and fine aggregate according to the particle size. Because the energy consumption for grinding the easily ground components is low, the production cost for further grinding is low, and the activity of the micro powder is increased after grinding, the easily ground components are ground; the components difficult to grind consume more energy and have poor activity when being ground, so the parts difficult to grind are kept into particles and are used as coarse and fine aggregate building material products after being deironized and screened.
Furthermore, in an embodiment, the hot blast stove provides hot air for drying the steel slag, a cold air valve is arranged at an outlet of the hot blast stove, the air enters the steel slag vertical mill and carries the materials to move upwards from the grinding disc, and the temperature of the air at the outlet of the steel slag vertical mill is more than or equal to 90 ℃.
It is pointed out that the fine powder is ground to more than or equal to 600m in a ball mill2/kg。
It is noted that the conveying chute is provided with a trigger adding device.
It should be noted that fine aggregate is arranged below the screen of the vibrating screen, and coarse aggregate is arranged above the screen of the vibrating screen.
In the embodiment, for example, hot smoldering steel slag is conveyed from a raw material storage to a raw material bin 1, raw materials are metered from the raw material bin and then are roughly separated into iron by a suspended iron remover A2, and the iron-removed materials are fed into a steel slag vertical mill 4 by a conveying reamer 3;
the steel slag vertical mill 4 internally comprises two or more grinding roller members, the grinding roller members are pressed on the grinding disc members under certain pressure, the grinding roller members are driven by the movement of the grinding disc members to rotate along with the grinding roller members, materials are ground under the action of pressure and friction force, the materials which are easy to grind are ground and refined, and the materials which are difficult to grind are rolled and shaped.
After grinding, the refined materials less than 0.075mm are brought to a powder selecting component of the steel slag vertical mill 4 by wind, the materials are selected by the powder selecting component, and the materials less than 0.075mm pass through the powder selecting component and are collected by the cyclone barrel 11; materials of not less than 0.075 are beaten down by the powder selecting component and are conveyed out of the steel slag vertical mill 4 through the built-in conveying reamer 6; the particle size of the grinded hard-to-grind materials is 3-7 mm, the materials escape from the grinding disc under the action of centrifugal force, enter an air ring, are discharged to the outside of the steel slag vertical mill 4 through a conveying belt, and a suspended iron remover B5 is arranged at the upper part of the conveying belt for removing iron; materials more than or equal to 0.075 and particles with the particle size of 3-7 mm after iron removal enter a magnetic separator 8 through an elevator A7 to remove iron, the materials after iron removal enter a vibrating screen 9, and the vibrating screen 9 screens the materials into building material products, namely coarse aggregates and fine aggregates.
When the coarse aggregate proportion is required to be high, the grinding pressure can be reduced or the rotating speed of a fan can be reduced, otherwise, the operation parameters are opposite; when the fine aggregate is needed to be in high proportion, the grinding pressure can be increased or the rotating speed of the fan can be increased, otherwise, the operation parameters are opposite; when the fine powder proportion is required to be high, the grinding pressure can be increased, or the rotating speed of the fan can be increased, or the rotating speed of the powder concentrator can be reduced, otherwise, the operation parameters are opposite.
The hot blast stove 10 provides hot air for drying the steel slag, a cold air valve is arranged at the outlet of the hot blast stove 10, the gas enters the steel slag vertical mill 4 and carries the materials to move upwards from the mill, the temperature of the gas at the outlet of the steel slag vertical mill 4 is more than or equal to 90 ℃, and the carried refined materials are collected by the cyclone 11 after passing through a powder selecting component; after passing through the cyclone 11 and the circulating fan 16, a part of the gas containing heat returns to the steel slag vertical mill 4 again, a part of the gas enters the dust collector A17 for dust removal and purification, and the purified gas is discharged into the air through the dust collecting fan A18 and the chimney 19.
Less than 0.075mm of material (the specific surface area is 250-350 m)2/kg) is collected by the cyclone 11 and enters the ball mill 12 for secondary grinding, and fine particles move from one end of the ball mill to the other end under the action of wind until the powder is ground to be more than or equal to 600m2The/kg is the finished product which is discharged outside the mill; the air passing through the ball mill 12 carries part of the fine powder, and the fine powder is discharged into the air through a dust collection fan B21 after being dedusted by a dust collector B20; finished products discharged by the ball mill 12, the fine powder collected by the dust collector A17 and the fine powder collected by the dust collector B20 pass through a conveying chute 13 and a lifter B14 and enter a fine powder bin 15, and an exciting agent adding device is arranged on the conveying chute 13.
Example two:
further, in an embodiment, the coarse aggregate is conveyed to the steel slag vertical mill by the conveying device to be ground until the whole material becomes fine powder and fine aggregate.
The hot disintegrating steel slag gradient utilization production technology is characterized in that according to the difference of grindability of different mineral phases in the hot disintegrating steel slag, easily-ground materials are ground, and difficultly-ground materials are kept to be granular, and the steel slag is utilized in a gradient mode to produce fine powder, fine aggregate and coarse aggregate, or to produce fine powder and fine aggregate.
In conclusion, the invention provides the preparation system for producing the building material product by utilizing the hot disintegrating steel slag in a gradient manner, wherein the hot disintegrating steel slag is utilized in a grading manner according to the characteristics of the raw materials of the hot disintegrating steel slag, the easily ground components are prepared into micro powder, and the difficultly ground components are prepared into coarse aggregate and fine aggregate, so that the production energy consumption is saved, the production cost is reduced, the product types are diversified, and the requirements of different customers can be met.
The present invention has been described in detail with reference to the above examples, but the description is only for the preferred examples of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims (6)

1. A preparation system for producing building material products by gradient utilization of hot stuffy steel slag is characterized in that: the preparation system for producing building material products by gradient utilization of hot and stuffy steel slag comprises a raw material bin, a suspended iron remover A, a conveying reamer, a steel slag vertical mill, a suspended iron remover B, a built-in conveying reamer, a lifting machine A, a magnetic separator, a vibrating screen, a hot blast stove, a cyclone cylinder, a ball mill, a conveying chute, a lifting machine B, a micro-powder bin, a circulating fan, a dust collector A, a dust collecting fan A, a chimney, a dust collector B and a dust collecting fan B, wherein the raw material bin is connected with the steel slag vertical mill through the conveying reamer, the suspended iron remover A is arranged between the raw material bin and the steel slag vertical mill, a grinding disc, a grinding roller and a powder selecting component are arranged in the steel slag vertical mill, fine aggregate which is beaten by the powder selecting component is collected by the cyclone cylinder, is conveyed to the outside the steel slag vertical mill through the built-in conveying reamer, coarse aggregate which escapes from the, the fine aggregate and the coarse aggregate enter a magnetic separator through a hoisting machine A, and the materials after iron removal through the magnetic separator enter a vibrating screen; after the gas separated by the cyclone cylinder passes through a circulating fan, returning one part of the gas to the steel slag vertical mill again, allowing the other part of the gas to enter a dust collector A for dust removal and purification, discharging the purified gas into air through a dust collection fan A and a chimney, allowing fine powder separated by the cyclone cylinder to enter a ball mill, carrying part of fine powder by wind of the ball mill, removing dust by a dust collector B, and discharging the fine powder into the air through a dust collection fan B; and the other part of the fine powder discharged by the ball mill, the fine powder collected by the dust collector A and the fine powder collected by the dust collector B enter a fine powder bin through a conveying chute and a lifter B.
2. The system for producing building material products by gradient utilization of hot steel slag smoldering according to claim 1, is characterized in that: the hot blast stove provides hot air for steel slag drying, a cold air valve is arranged at an outlet of the hot blast stove, gas enters the steel slag vertical mill and then carries materials to move upwards from the mill, and the temperature of the gas at the outlet of the steel slag vertical mill is more than or equal to 90 ℃.
3. The hot steel stuffer according to claim 1The preparation system for producing building material products by gradient utilization of slag is characterized in that: the fine powder is ground in a ball mill to be more than or equal to 600m2/kg。
4. The system for producing building material products by gradient utilization of hot steel slag smoldering according to claim 1, is characterized in that: and the conveying chute is provided with an exciting agent adding device.
5. The system for producing building material products by gradient utilization of hot steel slag smoldering according to claim 1, is characterized in that: the undersize of the vibrating screen is fine aggregate, and the oversize of the vibrating screen is coarse aggregate.
6. The system for producing building material products by gradient utilization of hot steel slag smoldering according to claim 5, is characterized in that: and conveying the coarse aggregate to a steel slag vertical mill through a conveying device for grinding until all materials become micro-fine powder and fine aggregate.
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CN113399032A (en) * 2021-06-23 2021-09-17 中材（天津）粉体技术装备有限公司 Efficient gradient combined grinding system and grinding process
CN114107581A (en) * 2021-11-17 2022-03-01 四川通达再生资源综合利用有限公司 Steel slag recycling device and method
CN115041290A (en) * 2022-06-14 2022-09-13 佛山市博晖机电有限公司 Micro powder production system and production method and dry powder making system

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CN112156854A (en) * 2020-10-13 2021-01-01 南京凯盛国际工程有限公司 Coarse and fine aggregate simultaneous preparation system
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CN115041290B (en) * 2022-06-14 2024-03-29 佛山市博晖机电有限公司 Micro powder production system and production method and dry powder preparation system

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