WO2013065940A1 - Bille de laitier de nickel respectueuse de l'environnement et trempée qui utilise un gaz à grande vitesse, procédé de fabrication de cette dernière et appareil permettant de fabriquer cette dernière - Google Patents

Bille de laitier de nickel respectueuse de l'environnement et trempée qui utilise un gaz à grande vitesse, procédé de fabrication de cette dernière et appareil permettant de fabriquer cette dernière Download PDF

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WO2013065940A1
WO2013065940A1 PCT/KR2012/006829 KR2012006829W WO2013065940A1 WO 2013065940 A1 WO2013065940 A1 WO 2013065940A1 KR 2012006829 W KR2012006829 W KR 2012006829W WO 2013065940 A1 WO2013065940 A1 WO 2013065940A1
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nickel slag
speed gas
slag ball
ball
friendly
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PCT/KR2012/006829
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English (en)
Korean (ko)
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오상윤
김창학
강기웅
문영배
강정훈
이원영
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주식회사 에코마이스터
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Publication of WO2013065940A1 publication Critical patent/WO2013065940A1/fr

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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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/14—Waste materials; Refuse from metallurgical processes
    • C04B18/141—Slags
    • C04B18/144—Slags from the production of specific metals other than iron or of specific alloys, e.g. ferrochrome slags
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/54—Processes yielding slags of special composition
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/14—Waste materials; Refuse from metallurgical processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/04—Working-up slag
    • 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
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling
    • 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

Definitions

  • the present invention relates to a quench-friendly environmentally friendly nickel slag ball using a high-speed gas, a method for manufacturing the same and a manufacturing apparatus thereof, and more particularly, to tungsten molten nickel slag generated in the process of producing ferronickel, which is a raw material of stainless steel. Dropping the molten nickel slag into fine droplets by injecting a high-speed gas to the molten nickel slag that is dropped, and quenching the finely separated molten nickel slag droplets by the injected high-speed gas and the surrounding atmosphere. It relates to an environmentally friendly nickel slag ball (aka LS Ball) excellent in hardness, a manufacturing method and a manufacturing apparatus.
  • an environmentally friendly nickel slag ball aka LS Ball
  • Nickel has a clark number of 0.01, which is equivalent to copper in the earth's crust, but is known to be present in large quantities with iron in the earth's core, and the amount in seawater is 5 g / l and contains about 8% in cloud. It is.
  • Nickel is a silver-white metal with chemical properties similar to iron, and is used as a raw material for stainless steel because of its excellent corrosion resistance and ease of processing. It can be forged and annealed, rich in malleability, ductility, and polished. Although it has strong magnetism, it is weaker than iron and has an electrical conductivity of 14.9% of copper, and is more stable than iron due to air and moisture, and does not oxidize well, and also does not erode by alkali. Easily soluble in dilute nitric acid, but concentrated nitric acid is immobilized like iron and does not erode, and reacts violently with chlorine and bromine.
  • the main natural minerals containing nickel are pentlandite and millerite, which are produced as sulfide minerals, and nickele and garnierite as well.
  • Pentlandite is an equiaxed system and is produced as a bulk or isomeric aggregate, accompanied by magnetite or brass in superbasic rocks. Hardness is 3.5-4 and specific gravity is 4.6-5. It is bimodal, has a metallic luster and is tan.
  • Millerite belongs to the hexagonal system and is often formed in the pores as a low temperature modified product of other nickel minerals.
  • Nickel is hexagonal and is often produced in bulk or kidney form. Hardness is 5 ⁇ 5.5, specific gravity is 7.78. It is easily distinguished by red color.
  • Ganilite is a nickel-magnesium silicate mineral with a large change in Ni: Mg ratio and green color. It is produced as a weathered product of olivine, a basic silicate mineral.
  • Nickel is a raw material of ferronickel (Ferronickel), a raw material for manufacturing stainless steel, to produce ferronickel by reducing nickel ore by using coke or the like in an electric furnace-type furnace using nickel ore.
  • the slag is nickel slag (ferronickel slag).
  • the nickel slag is discharged by the crushing and slow cooling method, the crushing method is discharged per day, at least about 500tons to as much as 1,500tons, and is immediately discharged by the spraying facility. It is sprinkled and cooled to slag temperature below 100 °C, and then sent to the processing company for crushing treatment.
  • Nickel slag discharged by slow cooling method is bulky and is produced through high temperature melting step of 1500 °C or higher. Since there is no harmfulness, the applicability as aggregate is highly appreciated.
  • the hydrocracked and slow cooling ferronickel slag is 40 to 70% by weight SiO 2 , 20 to 40% by weight MgO, 0.01 to 5% by weight CaO, 0.01 to 5% by weight Al 2 O 3 , 1 to 10% by weight FeO
  • the wear rate is 70 to 75%
  • the aggregate hardness is very low, there is a problem that does not meet the standard properties as aggregate.
  • a rovan aggregate aggregate composition using a ferronickel slag including 50 parts by weight to 99.99 parts by weight of a converter slag and 0.01 to 50 parts by weight of ferronickel slag and a method of manufacturing the same are provided.
  • the molten nickel slag is dropped through a tundish, and the molten nickel slag is sprayed at a high speed by dropping the molten nickel slag into fine droplets by separating the molten nickel slag into fine droplets.
  • Technical task is to provide an environmentally friendly nickel slag ball (aka LS Ball) having excellent hardness by using the step of quenching the separated molten nickel slag droplets by the injected gas and the ambient atmosphere.
  • the present invention is a spherical or elliptical particles having a diameter of 5mm or less compared to the conventional amorphous chain or slow cooling ferronickel slag ball, the dry density of 2.5 ⁇ 3.0 g / cm2, unit volume mass 1.5 ⁇ 2.0 Rapid cooling eco-friendly nickel slag ball using high-speed gas, characterized in that the kg / l, the performance rate 60 ⁇ 65%, the absorption rate 0.1 ⁇ 2.0%, Vickers hardness 1200 ⁇ 1400 HV 0.1 as a technical solution.
  • the nickel slag ball is cast sand, abrasives, building materials, ready-mixed concrete, ascon, polymer concrete material, soil pollution restoring material, water treatment media, reinforcement mortar material, concrete secondary products, non-slip material, bicycle road flooring, trails and athletics
  • the technical solution to the quenching environment-friendly nickel slag ball using high-speed gas characterized in that it is used as facility flooring material, cover material, sand mat material, roban material or building material.
  • the present invention comprises the steps of dropping the molten nickel slag of 1,500 ⁇ 1600 °C produced in the process of producing ferronickel as a raw material of stainless steel through a tundish (tundish); Separating the molten nickel slag into fine droplets by injecting a high-speed gas into the falling molten nickel slag; Quenching the separated fine droplets by the injected high-speed gas and the surrounding atmosphere to produce nickel slag balls; spherical or elliptical particles having a diameter of 5 mm or less, and a dry density of 2.5 to 3.0 g / cm 3, Quenched eco-friendly nickel slag ball using high-speed gas, characterized in that the nickel slag ball with a unit volume mass of 1.5-2.0 kg / l, 60-65% yield, 0.1-2.0% absorption, Vickers hardness 1200-1400 HV 0.1 is produced.
  • the manufacturing method is a technical solution.
  • the present invention is a device used in the quenching environment-friendly nickel slag ball manufacturing method using the high-speed gas, the molten nickel slag is supplied to be dropped while letting a certain amount of tapping;
  • a waste heat recovery system installed on the ceiling to recover the high temperature heat generated from the scattered spherical nickel slag ball and reusable, and are spherical or elliptical particles having a diameter of 5 mm or less, and are reconstituted.
  • High speed characterized by producing a nickel slag ball having a density of 2.5 to 3.0 g / cm 3, a unit volume mass of 1.5 to 2.0 kg / l, a yield of 60 to 65%, an absorption of 0.1 to 2.0%, and a Vickers hardness of 1200 to 1400 HV 0.1.
  • the high-speed gas injection nozzle is further configured to further include a flow guide to scatter in a constant trajectory by adjusting the direction and the fall distance of the scattered nickel slag ball in the spherical droplet state, the coolant jacket outside the flow guide It is formed, the inside of the quenching environment-friendly nickel slag ball production apparatus using a high-speed gas, characterized in that the cooling water injection unit is installed as a technical solution.
  • Lamina flow chamber is formed of a cylindrical body having an inlet and an outlet, quenching using a high-speed gas, characterized in that a plurality of dampers to adjust the amount and speed of air by acting as a valve by rotating and varying about an axis in the center
  • Environmentally friendly nickel slag ball production equipment is a technical solution.
  • the waste heat recovery system of the quench-friendly environmentally friendly nickel slag ball manufacturing apparatus using the high-speed gas is composed of a closed circuit so that the temperature in the nickel slag ball manufacturing apparatus is maintained at a high temperature and high temperature air is recovered to increase the heat recovery efficiency.
  • Rapid cooling eco-friendly nickel slag ball manufacturing apparatus using a high-speed gas characterized in that configured to trap the heat in the closed circuit so that the temperature in the ball manufacturing apparatus rises to a specific temperature and to send such high-temperature air to the waste heat recovery apparatus if a certain temperature is exceeded.
  • the molten nickel slag is dropped through a tundish, and the molten nickel slag is separated into fine droplets by spraying a high-speed gas to the molten nickel slag that is dropped, thereby finely separating the molten nickel slag droplets.
  • a high-speed gas to the molten nickel slag that is dropped, thereby finely separating the molten nickel slag droplets.
  • 1 is a view showing a conventional water treatment process of nickel slag
  • FIG. 2 is a view showing a slow cooling process of a conventional nickel slag
  • Figure 3 is a schematic diagram for manufacturing a nickel slag ball by injecting a high-speed gas of the present invention
  • Figure 4 is a nickel slag ball particle shape of the present invention
  • FIG. 5 is an overall configuration diagram of a nickel slag ball production apparatus of the present invention
  • FIG. 6 is an overall plan view of the nickel slag ball production apparatus of the present invention
  • Figure 7 is a closed circuit configuration of the waste heat recovery system of the nickel slag ball production apparatus of the present invention
  • FIG. 8 is a configuration diagram of a tundish of the nickel slag ball production apparatus of the present invention
  • FIG. 9 is a block diagram of a lamina flow chamber of the nickel slag ball production apparatus of the present invention
  • the present invention is spherical or elliptical particles having a diameter of 5 mm or less compared to conventional amorphous hydrocracked or slow-cooled ferronickel slag balls, with a dry density of 2.5 to 3.0 g / cm 3, unit volume mass of 1.5 to 2.0 kg / l, and a yield of 60.
  • the quenching environment-friendly nickel slag ball using high-speed gas characterized in that ⁇ 65%, absorption rate 0.1 ⁇ 2.0%, Vickers hardness 1200 ⁇ 1400 HV 0.1 is characterized by the technical configuration.
  • the nickel slag ball particles are green, black green, gray green, greenish brown, grayish brown, blackish brown, blackish gray or black color or quenched eco-friendly nickel slag using high-speed gas, characterized in that two or more of the colors are mixed.
  • the ball is characterized by a technical configuration.
  • the nickel slag ball is cast sand, abrasives, building materials, ready-mixed concrete, ascon, polymer concrete material, soil pollution restoring material, water treatment media, reinforcement mortar material, concrete secondary products, non-slip material, bicycle road flooring, trails and athletics
  • the quenching environment-friendly nickel slag ball using high-speed gas characterized in that it is used as facility flooring material, cover material, sand mat material, furnace material or building material is characterized by the technical configuration.
  • the present invention comprises the steps of dropping the molten nickel slag of 1,500 ⁇ 1600 °C produced in the process of producing ferronickel as a raw material of stainless steel through a tundish (tundish); Separating the molten nickel slag into fine droplets by injecting a high-speed gas into the falling molten nickel slag; Quenching the separated fine droplets by the injected high-speed gas and the surrounding atmosphere to produce nickel slag balls; spherical or elliptical particles having a diameter of 5 mm or less, and a dry density of 2.5 to 3.0 g / cm 3, Quenched eco-friendly nickel slag ball using high-speed gas, characterized in that the nickel slag ball with a unit volume mass of 1.5-2.0 kg / l, 60-65% yield, 0.1-2.0% absorption, Vickers hardness 1200-1400 HV 0.1 is produced.
  • the manufacturing method is characterized by the technical configuration.
  • the present invention is a device used in the quenching environment-friendly nickel slag ball manufacturing method using the high-speed gas, the molten nickel slag is supplied to be dropped while letting a certain amount of tapping;
  • a waste heat recovery system installed on the ceiling to recover the high temperature heat generated from the scattered spherical nickel slag ball and reusable, and are spherical or elliptical particles having a diameter of 5 mm or less, and are reconstituted.
  • High speed characterized by producing a nickel slag ball having a density of 2.5 to 3.0 g / cm 3, a unit volume mass of 1.5 to 2.0 kg / l, a yield of 60 to 65%, an absorption of 0.1 to 2.0%, and a Vickers hardness of 1200 to 1400 HV 0.1.
  • the quenching environment-friendly nickel slag ball manufacturing apparatus using gas is a feature of technology construction.
  • the high-speed gas injection nozzle is further configured to further include a flow guide to scatter in a constant trajectory by adjusting the direction and the fall distance of the scattered nickel slag ball in the spherical droplet state, the coolant jacket outside the flow guide It is formed, the inside of the quenching environment-friendly nickel slag ball production apparatus using a high-speed gas, characterized in that the cooling water injection unit is characterized in that the technical configuration.
  • Lamina flow chamber is formed of a cylindrical body having an inlet and an outlet, quenching using a high-speed gas, characterized in that a plurality of dampers to adjust the amount and speed of air by acting as a valve by rotating and varying about an axis in the center Eco-friendly nickel slag ball production device is characterized by its technical configuration.
  • the waste heat recovery system of the quench-friendly environmentally friendly nickel slag ball manufacturing apparatus using the high-speed gas is composed of a closed circuit so that the temperature in the nickel slag ball manufacturing apparatus is maintained at a high temperature and high temperature air is recovered to increase the heat recovery efficiency.
  • Rapid cooling eco-friendly nickel slag ball manufacturing apparatus using a high-speed gas characterized in that configured to trap the heat in the closed circuit so that the temperature in the ball manufacturing apparatus rises to a specific temperature and to send such high-temperature air to the waste heat recovery apparatus if a certain temperature is exceeded. It is characterized by the technical configuration.
  • molten nickel slag is discharged into a treatment plant and sprayed with a large amount of water to cool and solidify (water-slag slag) or slow-cool (slow-slag slag) in air, that is, tapping ⁇ dumping ⁇ watering or air cooling ⁇ excavation
  • transfer ⁇ primary yards ⁇ shredding and sorting methods were common.
  • the nickel slag of the water-cooled or slow-cooled method is a block, added to the process to be crushed in the post-process, requires a yard for slow cooling, there is a limit to recycle because of the low hardness of the nickel slag.
  • the present invention comprises the steps of dropping the molten nickel slag of 1,500 ⁇ 1600 °C produced in the process of producing ferronickel as a raw material of stainless steel through a tundish (tundish); Separating the molten nickel slag into fine droplets by injecting a high-speed gas into the falling molten nickel slag; Quenching the separated fine droplets by the injected high-speed gas and the surrounding atmosphere to produce nickel slag balls; spherical or elliptical particles having a diameter of 5 mm or less, and a dry density of 2.5 to 3.0 g / cm 3, To manufacture nickel slag balls (also called LS Balls) with 1.5 ⁇ 2.0 kg / l of unit volume, 60 ⁇ 65% of performance rate, 0.1 ⁇ 2.0% of absorption rate, and Vickers hardness of 1200 ⁇ 1400 HV 0.1, to be recycled for various purposes. In order to complete the present invention.
  • FIG. 1 is a view showing a conventional process for the hydrolysis of nickel slag
  • Figure 2 is a view showing a slow cooling process of the conventional nickel slag
  • Figure 3 is a schematic diagram of manufacturing a nickel slag ball by spraying the high-speed gas of the present invention
  • Figure 4 is a nickel slag ball particle shape photograph of the present invention
  • Figure 5 is an overall configuration of the nickel slag ball production apparatus of the present invention
  • Figure 6 is an overall plan view of the nickel slag ball production apparatus of the present invention
  • Figure 7 is the present invention
  • Fig. 8 is a configuration diagram of a tundish of the nickel slag ball production device of the present invention
  • Fig. 9 is a lamina flow chamber of the nickel slag ball production device of the present invention.
  • 10 and 11 are flow guide configuration diagrams of the nickel slag ball manufacturing apparatus of the present invention.
  • the molten nickel slag of 1,500 to 1,600 ° C. generated in the process of producing ferronickel, which is a raw material of stainless steel, is dropped through tundish, and the molten falling is performed.
  • the molten nickel slag is separated into fine droplets by injecting high-speed gas into the nickel slag, and the separated fine droplets are quenched by the injected high-speed gas and the surrounding atmosphere to produce nickel slag balls.
  • the unit volume mass refers to the mass of the material that enters the unit volume, which has a close relationship with the performance rate, and serves as a major factor in determining the quality of the aggregate.
  • the structure of densities is high and the hardness is high, indicating that the aggregate quality is excellent.
  • the quenched nickel slag ball of the present invention has a dry density of 2.5 to 3.0 g / cm3 and a unit volume mass of 1.5 to 2.0 kg / l as compared with the dry quality of 2.4 or more g / cm 3 and the water absorption of 4% or less, which are the quality standards of sand. It can be seen that the physical properties are excellent as the water absorption of 0.1 to 2.0%.
  • Nickel slag tapping and sputtering into spherical liquid droplets during the high-speed gas injection process is cooled and solidified, and at the same time, slag particles and high-speed gas are rubbed, and as a result, as shown in FIG.
  • the nickel slag particles are spherical or elliptical, and the surface color of the particles is green, black green, gray green, green brown, gray brown, black brown, black gray or black, or two or more of the above colors are mixed, Smooth slag particles can be obtained, and have a spherical or elliptical shape as opposed to the shape of amorphous nickel slag by conventional water chain or slow cooling.
  • the nickel slag ball manufacturing apparatus is a molten nickel slag port (1), a tundish (2), a lamina flow chamber (3), a gas injection nozzle (4), a flow guide (5), and a waste heat recovery system (7).
  • the molten nickel slag port (1) flows the molten nickel slag to the tundish (2), inclined at an appropriate angle to cause the molten nickel slag to be discharged to the tundish (2), the tundish (2) As shown in FIG. 8, the molten nickel slag 2a discharged from the molten nickel slag port 1 flows in a fluid manner.
  • the amount of tapping of the molten nickel slag 2a is measured in real time by the camera C1 and the camera C2 and fed back to the computer P connected to the MCC (PLC) (M), thereby providing a molten nickel slag ( It is possible to control the discharge amount of 2a) and determine the abnormality of the process, calculate the measured value in the computer (P) and transmit the maximum value, the minimum value and the average value to the comprehensive management computer to automatically control the device, the melting
  • the amount of tapping of nickel slag is calculated in the computer P by reflecting the volume and specific gravity of the molten slag on the basis of measuring how much slag occupies the cross section of the tundish in real time in the camera.
  • the tundish 2 is inclined at an angle of 10 to 60 ° downward in the horizontal direction so that the molten nickel slag 2a can stay and be discharged smoothly, and the molten nickel of the tundish 2 is The slag 2a is discharged by a predetermined amount and falls to the gas injection nozzle 4.
  • the gas injection nozzle 4 is for quenching the molten nickel slag while simultaneously dropping the falling molten nickel slag 2a into fine droplets.
  • a flow guide 5 is provided in front of the gas injection nozzle 4, The lamina flow chamber 3 is connected and installed.
  • the laminar flow chamber 3 is formed of a cylinder having an inlet and an outlet as shown in FIG. 9, and rotates and changes about an axis in the center to act as a valve to control the amount and speed of air.
  • a plurality of dampers (3a) are installed to adjust the flow trajectory (flow) of the nickel slag ball produced by variously adjusting the amount, speed and distribution of the air injected from the gas injection nozzle (4) during the molten nickel slag fine spherical droplets and The cooling rate is controlled.
  • FIG. 10 illustrates an upper flow guide
  • FIG. 11 illustrates a flow guide side.
  • the flow guide 5 controls the flight trajectory of the high temperature nickel slag balls scattered upward and left and right when the nickel slag fine spherical droplets are formed.
  • the inside is composed of a water jacket, and the outside is a jet of water spray nozzle.
  • the molten nickel slag (2a) is tapping into the tundish (2), wherein molten nickel
  • the amount of slag 2a is measured in real time by cameras C1 and C2.
  • the molten nickel slag 2a is scattered into a fine spherical droplet of nickel slag ball through the gas spray nozzle 4 under the tundish 2, and at this time, the nickel slag ball is moved up and down by the flow guide 5. It prevents irregular scattering from side to side, and causes a constant scattering trajectory.
  • the high temperature heat (about 200 ° C. or more) generated in the nickel slag ball passing through the flow guide 5 is recovered to be recycled through the waste heat recovery system 7.
  • the waste heat recovery system 7 As shown in FIG. 7, the temperature in the nickel slag ball manufacturing apparatus is specified so that the temperature in the nickel slag ball manufacturing apparatus is maintained at a high temperature by using the closed circuit duct 15 and high temperature air is recovered to increase the heat recovery efficiency. The heat is trapped in a closed circuit to circulate to a value, and when a certain temperature is exceeded, the hot air is sent to the waste heat recovery device.
  • the molten nickel slag flow rate per unit time is 50kg / sec and the high-speed gas injection rate is 100m / sec according to the following calculation formula of flow rate of molten nickel slag per unit time and high speed gas injection rate.
  • Slag ball (LS Ball) was prepared.
  • V flow rate of molten nickel slag per unit time (g / sec)
  • FIG. 4 Optical micrographs and scanning electron micrographs showing the spherical particle characteristics of the nickel slag ball (LS Ball) prepared in Example 1 are shown in FIG. 4, and the dry density, absorption rate, Vickers hardness, unit volume mass and performance by particle size are shown in FIG. 4. The rate (unit volume mass and performance test method of KS F 2505 aggregate) was calculated and shown in the following [Table 1].
  • the nickel slag ball of the present invention is a uniform spherical or elliptical, it can be seen that the unit volume weight and yield is increased, the color of the nickel slag ball particles green, black green, Gray green, greenish brown, grayish brown, blackish brown, blackish gray or black color or two or more of the above color can be confirmed that the mixture.
  • the nickel slag ball of the present invention has a good unit volume mass, yield rate, water absorption rate and hardness, so that foundry sand, abrasives, building materials, ready-mixed concrete, ascon, polymer concrete material, soil contamination restoration It can be used for various purposes such as ash, water treatment media, reinforcement mortar, concrete secondary products, non-slip materials, bicycle road flooring, walkway and athletic facility flooring, cover material, sand mat, roban or building materials. It is highly effective.
  • the present invention drops molten nickel slag generated during the production of ferronickel, which is a raw material of stainless steel, through tundish, and separates molten nickel slag into fine droplets by spraying a high-speed gas to the molten nickel slag that is dropped.
  • molten nickel slag generated during the production of ferronickel
  • the present invention drops molten nickel slag generated during the production of ferronickel, which is a raw material of stainless steel, through tundish, and separates molten nickel slag into fine droplets by spraying a high-speed gas to the molten nickel slag that is dropped.
  • the step of quenching the finely separated molten nickel slag droplets by the injected high-speed gas and the ambient atmosphere it is spherical and hardness-friendly environmentally friendly nickel slag ball, compared to the existing amorphous crushed or slow-cooled ferronickel slag balls.
  • nickel slag ball can be recycled into various building materials and civil engineering materials

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Abstract

La présente invention se rapporte à une bille de laitier de nickel respectueuse de l'environnement et trempée qui utilise un gaz à grande vitesse, à un procédé de fabrication de cette dernière et à un appareil permettant de fabriquer cette dernière. Plus particulièrement, la présente invention se rapporte à une bille de laitier de nickel respectueuse de l'environnement (également connue sous le nom de bille LS) qui présente une bonne dureté, à un procédé de fabrication de cette dernière et à un appareil permettant de fabriquer cette dernière. Le procédé consiste à laisser tomber un laitier de nickel fondu produit pendant la production du ferronickel, qui peut être la matière première pour produire un acier inoxydable, au moyen d'un panier de coulée ; à pulvériser un gaz à grande vitesse sur le laitier de nickel fondu qui tombe afin de séparer le laitier de nickel fondu en de minuscules gouttelettes liquides ; et à refroidir les minuscules gouttelettes liquides séparées du laitier de nickel fondu à l'aide de la pulvérisation de gaz à grande vitesse dans l'atmosphère ambiante.
PCT/KR2012/006829 2011-10-31 2012-08-27 Bille de laitier de nickel respectueuse de l'environnement et trempée qui utilise un gaz à grande vitesse, procédé de fabrication de cette dernière et appareil permettant de fabriquer cette dernière WO2013065940A1 (fr)

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KR10-2011-0112315 2011-10-31

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CN110218100A (zh) * 2019-07-20 2019-09-10 兰州理工大学 一种镍铁冶炼高温熔渣制备空心陶瓷微球的方法
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KR101975858B1 (ko) * 2017-04-20 2019-05-08 곽은구 아크릴 수지를 사용한 충격흡수 콘크리트 보도블록 제조용 모르타르 조성물 및 이를 이용한 충격흡수 콘크리트 보도블록
CN107840653A (zh) * 2017-11-29 2018-03-27 阳泉中创陶粒有限公司 一种铝镁尖晶石重熔球形铸造砂的制备方法

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