CN113501672A - Fatifacient steel slag micro powder particle and preparation method thereof - Google Patents
Fatifacient steel slag micro powder particle and preparation method thereof Download PDFInfo
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- CN113501672A CN113501672A CN202110904665.5A CN202110904665A CN113501672A CN 113501672 A CN113501672 A CN 113501672A CN 202110904665 A CN202110904665 A CN 202110904665A CN 113501672 A CN113501672 A CN 113501672A
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- steel slag
- slag micro
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- micro powder
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a degenerated steel slag micro powder particle and a preparation method thereof, wherein the degenerated steel slag micro powder particle comprises the following raw materials in parts by weight: 1000 parts of steel slag particles, 15-25 parts of sodium silicate binder and 0.4-0.8 part of epoxy resin coating liquid. The raw materials for preparing the steel slag micro-powder particles do not need to reach the specific surface area of 600 plus 750 square meters per kg, and the fine grinding process can be omitted in the production process. Optional equipment in the pre-grinding process is increased, and equipment investment and energy consumption can be saved. The utilization mode of the steel slag micro powder particles is changed from chemical component utilization to physical utilization, and the steel slag with high activity and the inert components of RO phase do not need to be specially selected, so that the utilization of the steel slag with low activity is facilitated.
Description
Technical Field
The invention relates to the technical field of steel slag cement, in particular to degenerated steel slag micro-powder particles and a preparation method thereof.
Background
The steel slag utilization is widely researched in China, and important research results are obtained, so that the direction is pointed for the high-value recycling of the steel slag in China; the steel slag is ground into steel slag micro powder with a certain fineness, so that the steel slag micro powder has remarkable economic benefit, environmental benefit and social benefit, accords with national industrial policy, and has a wide market.
At present, the utilization mode of the steel slag is single, and the steel slag is usually crushed to select iron from naturally pulverized steel slag blocks, and the crushed iron-selecting particles are further ground to obtain steel slag micro powder with the specific surface area of 600 plus 750 square meters per kg. The steel slag micro powder is mixed into the cement in a mixed material mode according to a proportion to prepare the steel slag cement, wherein the mixing amount is not more than 20%. However, the steel slag cement manufactured by using the steel slag at the present stage has the following defects:
1. the specific surface area of the steel slag micro powder used as the cement mixing material is 600-750 square meters per kg. The requirements can be met after pre-grinding and fine grinding processes, and the existing fine grinding equipment is generally a ball mill. The ball mill has large power consumption and complex fine grinding process.
2. The steel slag micropowder used as a cement admixture needs to be screened for the inert component RO phase. The RO phase in the steel slag accounts for about 20 to 30 percent in proportion, no better treatment mode exists, and new solid waste can be formed when the steel slag is treated.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the degenerated steel slag micro-powder particles and the preparation method thereof.
The degenerated steel slag micro powder particle comprises the following raw materials in parts by weight: 1000 parts of steel slag particles, 15-25 parts of sodium silicate binder and 0.4-0.8 part of epoxy resin coating liquid.
A preparation method of degenerated steel slag micro-powder particles comprises the following steps:
the method comprises the following steps: putting the steel slag particles with the particle size of 4-5mm into a pulverizer for pulverizing to form steel slag micro powder with the particle size of 0.1-50 mu m, the specific surface area of 380-420 square meters per kg and the water content of 0.2-0.4 percent;
step two: the ground steel slag micro powder is transmitted into a granulating system of a boiling granulator through quantitative conveying equipment;
step three: the circulating air system of the boiling granulator drives the steel slag micro powder qualified in powder selection to continuously roll in the granulating system of the boiling granulator, and meanwhile, the heat supply system of the boiling granulator continuously supplies hot air of 200-230 ℃ to the granulating system to dry the steel slag micro powder;
step four: atomizing a liquid sodium silicate binder by an atomizing system of the boiling granulator and spraying the atomized liquid sodium silicate binder into a granulating system;
step five: the atomized sodium silicate binder is fully contacted with the steel slag micro powder rolling in the granulation system and wraps the surface of the steel slag micro powder, and the sodium silicate binder is rapidly solidified within 5-10 min at the environmental temperature of 200-230 ℃ to form steel slag micro powder particles;
step six: after entering a powder selecting system of a boiling granulator, the steel slag micro powder particles are screened under the action of a circulating air system, and qualified steel slag micro powder particles are screened by the powder selecting system and enter a coating machine for coating treatment;
step seven: the steel slag micro powder particles roll in the coating machine, and an atomization system of the coating machine atomizes the liquid epoxy resin coating liquid and then sprays the liquid epoxy resin coating liquid into the coating machine;
step eight: the atomized epoxy resin coating liquid is fully contacted with the steel slag micro-powder particles rolled in the coating machine and coated on the surfaces of the steel slag micro-powder particles, and the epoxy resin coating liquid is completely cured within 15-20 min at the ambient temperature of 75-85 ℃ to form the degenerated steel slag micro-powder particles.
Further, in the sixth step, the qualified steel slag micro-powder particles screened by the powder selecting system have the particle size of 1.5mm-2 mm.
Further, in the sixth step, the granules with the particle size of more than 2mm screened by the powder selecting system enter a defective product warehouse, the granules with the particle size of less than 1.5mm enter a granulating system, and the operation of the fifth step is repeated.
In conclusion, the invention has the following beneficial effects:
1. the raw materials for preparing the steel slag micro-powder particles do not need to reach the specific surface area of 600 plus 750 square meters per kg, and the fine grinding process can be omitted in the production process. Optional equipment in the pre-grinding process is increased, and equipment investment and energy consumption can be saved.
2. The utilization mode of the steel slag micro powder particles is changed from chemical component utilization to physical utilization, and the steel slag with high activity and the inert components of RO phase do not need to be specially selected, so that the utilization of the steel slag with low activity is facilitated.
Detailed Description
Example one
The degenerated steel slag micro powder particle is characterized by comprising the following raw materials in parts by weight: 1000 parts of steel slag particles, 15 parts of sodium silicate binder and 0.4 part of epoxy resin coating liquid.
A preparation method of degenerated steel slag micro-powder particles is characterized by comprising the following steps:
the method comprises the following steps: putting the steel slag particles with the particle size of 4-5mm into a pulverizer for pulverizing to form steel slag micro powder with the particle size of 0.1-50 mu m, the specific surface area of 380-420 square meters per kg and the water content of 0.2-0.4 percent;
step two: the ground steel slag micro powder is transmitted into a granulating system of a boiling granulator through quantitative conveying equipment;
step three: the circulating air system of the boiling granulator drives the steel slag micro powder with qualified powder selection to continuously roll in the granulation system of the boiling granulator, and meanwhile, the heating system of the boiling granulator continuously supplies hot air with the temperature of 200 ℃ to the granulation system to dry the steel slag micro powder;
step four: atomizing a liquid sodium silicate binder by an atomizing system of the boiling granulator and spraying the atomized liquid sodium silicate binder into a granulating system;
step five: the atomized sodium silicate binder is fully contacted with the steel slag micro powder rolling in the granulation system and wraps the surface of the steel slag micro powder, and the sodium silicate binder is rapidly solidified within 5min at the environmental temperature of 200 ℃ to form steel slag micro powder particles;
step six: after entering a powder selecting system of a boiling granulator, steel slag micro powder particles are screened under the action of a circulating air system, the steel slag micro powder particles with the particle size of 1.5mm-2mm enter a coating machine for coating treatment, the particles with the particle size of more than 2mm enter a defective product warehouse, the particles with the particle size of less than 1.5mm enter a granulating system, and the operation of the fifth step is repeated;
step seven: the steel slag micro powder particles roll in the coating machine, and an atomization system of the coating machine atomizes the liquid epoxy resin coating liquid and then sprays the liquid epoxy resin coating liquid into the coating machine;
step eight: the atomized epoxy resin coating liquid is fully contacted with steel slag micro-powder particles rolled in the coating machine and coated on the surfaces of the steel slag micro-powder particles, and the epoxy resin coating liquid is completely cured within 15min at the ambient temperature of 75 ℃ to form degenerated steel slag micro-powder particles.
Example two
The degenerated steel slag micro powder particle is characterized by comprising the following raw materials in parts by weight: 1000 parts of steel slag particles, 25 parts of sodium silicate binder and 0.8 part of epoxy resin coating liquid.
A preparation method of degenerated steel slag micro-powder particles is characterized by comprising the following steps:
the method comprises the following steps: putting the steel slag particles with the particle size of 4-5mm into a pulverizer for pulverizing to form steel slag micro powder with the particle size of 0.1-50 mu m, the specific surface area of 380-420 square meters per kg and the water content of 0.2-0.4 percent;
step two: the ground steel slag micro powder is transmitted into a granulating system of a boiling granulator through quantitative conveying equipment;
step three: the circulating air system of the boiling granulator drives the steel slag micro powder with qualified powder selection to continuously roll in the granulation system of the boiling granulator, and meanwhile, the heat supply system of the boiling granulator continuously supplies hot air with the temperature of 230 ℃ to the granulation system to dry the steel slag micro powder;
step four: atomizing a liquid sodium silicate binder by an atomizing system of the boiling granulator and spraying the atomized liquid sodium silicate binder into a granulating system;
step five: the atomized sodium silicate binder is fully contacted with the steel slag micro powder rolling in the granulation system and wraps the surface of the steel slag micro powder, and the sodium silicate binder is rapidly solidified within 10min at the ambient temperature of 230 ℃ to form steel slag micro powder particles;
step six: after entering a powder selecting system of a boiling granulator, steel slag micro powder particles are screened under the action of a circulating air system, the steel slag micro powder particles with the particle size of 1.5mm-2mm enter a coating machine for coating treatment, the particles with the particle size of more than 2mm enter a defective product warehouse, the particles with the particle size of less than 1.5mm enter a granulating system, and the operation of the fifth step is repeated;
step seven: the steel slag micro powder particles roll in the coating machine, and an atomization system of the coating machine atomizes the liquid epoxy resin coating liquid and then sprays the liquid epoxy resin coating liquid into the coating machine;
step eight: the atomized epoxy resin coating liquid is fully contacted with steel slag micro-powder particles rolled in the coating machine and coated on the surfaces of the steel slag micro-powder particles, and the epoxy resin coating liquid is completely cured within 20min at the ambient temperature of 85 ℃ to form degenerated steel slag micro-powder particles.
EXAMPLE III
The degenerated steel slag micro powder particle is characterized by comprising the following raw materials in parts by weight: 1000 parts of steel slag particles, 20 parts of sodium silicate binder and 0.6 part of epoxy resin coating liquid.
A preparation method of degenerated steel slag micro-powder particles is characterized by comprising the following steps:
the method comprises the following steps: putting the steel slag particles with the particle size of 4-5mm into a pulverizer for pulverizing to form steel slag micro powder with the particle size of 0.1-50 mu m, the specific surface area of 380-420 square meters per kg and the water content of 0.2-0.4 percent;
step two: the ground steel slag micro powder is transmitted into a granulating system of a boiling granulator through quantitative conveying equipment;
step three: the circulating air system of the boiling granulator drives the steel slag micro powder with qualified powder selection to continuously roll in the granulating system of the boiling granulator, and meanwhile, the heat supply system of the boiling granulator continuously supplies 215 ℃ hot air to the granulating system to dry the steel slag micro powder;
step four: atomizing a liquid sodium silicate binder by an atomizing system of the boiling granulator and spraying the atomized liquid sodium silicate binder into a granulating system;
step five: the atomized sodium silicate binder is fully contacted with the steel slag micro powder rolling in the granulation system and wraps the surface of the steel slag micro powder, and the sodium silicate binder is rapidly solidified within 8min at the environmental temperature of 215 ℃ to form steel slag micro powder particles;
step six: after entering a powder selecting system of a boiling granulator, steel slag micro powder particles are screened under the action of a circulating air system, the steel slag micro powder particles with the particle size of 1.5mm-2mm enter a coating machine for coating treatment, the particles with the particle size of more than 2mm enter a defective product warehouse, the particles with the particle size of less than 1.5mm enter a granulating system, and the operation of the fifth step is repeated;
step seven: the steel slag micro powder particles roll in the coating machine, and an atomization system of the coating machine atomizes the liquid epoxy resin coating liquid and then sprays the liquid epoxy resin coating liquid into the coating machine;
step eight: the atomized epoxy resin coating liquid is fully contacted with steel slag micro-powder particles rolled in the coating machine and coated on the surfaces of the steel slag micro-powder particles, and the epoxy resin coating liquid is completely cured within 17min at the ambient temperature of 80 ℃ to form degenerated steel slag micro-powder particles.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (4)
1. The degenerated steel slag micro powder particle is characterized by comprising the following raw materials in parts by weight: 1000 parts of steel slag particles, 15-25 parts of sodium silicate binder and 0.4-0.8 part of epoxy resin coating liquid.
2. A preparation method of degenerated steel slag micro-powder particles is characterized by comprising the following steps:
the method comprises the following steps: putting the steel slag particles with the particle size of 4-5mm into a pulverizer for pulverizing to form steel slag micro powder with the particle size of 0.1-50 mu m, the specific surface area of 380-420 square meters per kg and the water content of 0.2-0.4 percent;
step two: the ground steel slag micro powder is transmitted into a granulating system of a boiling granulator through quantitative conveying equipment;
step three: the circulating air system of the boiling granulator drives the steel slag micro powder qualified in powder selection to continuously roll in the granulating system of the boiling granulator, and meanwhile, the heat supply system of the boiling granulator continuously supplies hot air of 200-230 ℃ to the granulating system to dry the steel slag micro powder;
step four: atomizing a liquid sodium silicate binder by an atomizing system of the boiling granulator and spraying the atomized liquid sodium silicate binder into a granulating system;
step five: the atomized sodium silicate binder is fully contacted with the steel slag micro powder rolling in the granulation system and wraps the surface of the steel slag micro powder, and the sodium silicate binder is rapidly solidified within 5-10 min at the environmental temperature of 200-230 ℃ to form steel slag micro powder particles;
step six: after entering a powder selecting system of a boiling granulator, the steel slag micro powder particles are screened under the action of a circulating air system, and qualified steel slag micro powder particles are screened by the powder selecting system and enter a coating machine for coating treatment;
step seven: the steel slag micro powder particles roll in the coating machine, and an atomization system of the coating machine atomizes the liquid epoxy resin coating liquid and then sprays the liquid epoxy resin coating liquid into the coating machine;
step eight: the atomized epoxy resin coating liquid is fully contacted with the steel slag micro-powder particles rolled in the coating machine and coated on the surfaces of the steel slag micro-powder particles, and the epoxy resin coating liquid is completely cured within 15-20 min at the ambient temperature of 75-85 ℃ to form the degenerated steel slag micro-powder particles.
3. The method for preparing degenerated steel slag micro-powder particles as claimed in claim 2, wherein in the sixth step, the size of the steel slag micro-powder particles qualified by the powder selection system is 1.5mm-2 mm.
4. The method as claimed in claim 3, wherein in the sixth step, the particles with a particle size of more than 2mm screened by the powder selection system enter the defective warehouse, the particles with a particle size of less than 1.5mm enter the granulation system, and the fifth step is repeated.
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2021
- 2021-08-07 CN CN202110904665.5A patent/CN113501672A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101343155A (en) * | 2008-08-29 | 2009-01-14 | 济南大学 | Regeneration aggregate made of carbonized maintaining castoff |
| CN101864274A (en) * | 2009-04-20 | 2010-10-20 | 宝山钢铁股份有限公司 | Powdery waterproof material produced by steel slag and production method thereof |
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