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WO1995015929A1 - Procede et recipient de granulation de laitier utilisant le broyage par air - Google Patents

Procede et recipient de granulation de laitier utilisant le broyage par air Download PDF

Info

Publication number
WO1995015929A1
WO1995015929A1 PCT/CN1994/000098 CN9400098W WO9515929A1 WO 1995015929 A1 WO1995015929 A1 WO 1995015929A1 CN 9400098 W CN9400098 W CN 9400098W WO 9515929 A1 WO9515929 A1 WO 9515929A1
Authority
WO
WIPO (PCT)
Prior art keywords
slag
gas
pool
tundish
granulator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN1994/000098
Other languages
English (en)
Chinese (zh)
Inventor
Yongzhi Li
Tianfu Geng
Kaiji Li
Shirong Xia
Yi Peng
Bin Ye
Guomin Hu
Changjian Miao
Shuqi Lai
Shimin Li
Zhenqiang Zhou
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chengdu Iron & Steel Works
Original Assignee
Chengdu Iron & Steel Works
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chengdu Iron & Steel Works filed Critical Chengdu Iron & Steel Works
Priority to AU11901/95A priority Critical patent/AU683520B2/en
Publication of WO1995015929A1 publication Critical patent/WO1995015929A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C21B3/08—Cooling slag
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
    • B01J2/04—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a gaseous medium
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/066—Receptacle features where the slag is treated
    • C21B2400/072—Tanks to collect the slag, e.g. water tank

Definitions

  • the invention relates to a method and a device for granulating slag, in particular to a method and a device for granulating and granulating copper slag. Background technique
  • Japanese Patent No. 8120.061 discloses a technology for blowing slag of a converter with compressed air and cooling it with water. Utilizing this patent, it is sprayed under water pressure of 0.7Mpa, water-cooled, the granulation rate reaches 91%, and the air consumption is 500-1000N Vt slag.
  • Chinese Patent No. 882 11 276 ⁇ 7 discloses a steel slag wind granulation device, which is composed of a tundish, a granulator, and a pool.
  • the bottom of the tundish and the flow slot have a certain slope.
  • the granulator uses compressed air as the air source, and the front side is arranged with a sparge-shaped spray hole.
  • the steel slag ladle needs to be hoisted and tilted to the tundish by a crane.
  • the working conditions are harsh, unsafe, and the productivity is not high.
  • the granulator with nozzles arranged in a ⁇ shape has a high air consumption and a low utilization rate of compressed air.
  • Gas is used as the gas source of the granulator.
  • the residual molten steel is severely oxidized during granulation.
  • the air pollution is serious and an air compressor and a gas supply line need to be installed.
  • the gas source investment is large.
  • the purpose of the present invention is to provide a method and a device for slag gas granulation with simple process, saving investment, convenient operation, safe and reliable, saving energy, eliminating environmental pollution and high productivity.
  • the slag gas granulation method according to the present invention includes the following steps:
  • crushed liquid slag droplets are cooled and solidified during forward flight, forming spherical slag particles, which are scattered in the sediment pool for further cooling;
  • the slag gas granulation device includes: a slag bag overturning device, a tundish, a granulator, a pool, a slag retaining wall and a gas source; a slag bag overturning mechanism for liquid
  • the slag is tipped to the tundish; the liquid slag flows out of the tundish.
  • the granulator is located below the tundish and is connected to an air source. The slag breaks and falls into the pool.
  • the pore diameter of the bottom row of the spray holes is larger than the pore diameters of both sides.
  • the angle of the centerline of the vertical apertures on both sides can be varied from 0-120 °.
  • the slag gas granulation device of the present invention further includes a dust removal device.
  • the device is composed of a water pipe arranged around the water pool, and a plurality of spray holes are distributed on the water pipe, and a dustproof leather is added to the pool.
  • the overturning mechanism provided by the slag gas granulation device of the present invention is used to overturn the slag containing bag, so that the slag therein is poured into the tundish.
  • the tipping mechanism further includes a slag bag supporting mechanism and a positioning device for preventing the slag bag from tipping over and falling off.
  • the slag gas granulation device of the present invention is further provided with a slag retaining wall to prevent the slag from flowing into the pool and causing an explosion, and the slag retaining wall is located between the granulator and the pool.
  • FIG. 1 is a general layout diagram of the present invention
  • Figure 2 is a top view of Figure 1, (remove dust prevention leather);
  • Figure 3 shows the dump bag tilting mechanism of the device of the present invention
  • FIG. 4 is a top view of FIG. 3;
  • Figure 5 shows the structure of the slag pack of the device of the present invention
  • FIG. 6 is a U-shaped structure of the granulating nozzle of the device of the present invention.
  • Fig. 7 shows a u-shaped structure of the granulator nozzle holes of the device of the present invention. Detailed description of the examples ⁇
  • the gas source of the granulator uses a large amount of surplus nitrogen or steam from a metallurgical plant, and compressed air can also be used. Nitrogen has the effect of preventing oxidation of residual metal in the slag.
  • the granulator uses nitrogen, and the working pressure of compressed nitrogen is 0.2-0.6Mpa, the gas consumption is 30-50Nm 3 / t, and the ability to treat slag is 2- 3, 5t / min. 0
  • a slag granulation device includes a slag bag tilting mechanism 1, a slag bag 2, a tundish 3, a granulator 9, a pool 4, a slag retaining wall 7, Dedusting device 6, air source 8.
  • the tipping mechanism as shown in FIG. 3, is mainly composed of three parts, that is, a slag bag supporting mechanism 10, a tipping frame 16, and a hydraulic tipping system.
  • a support ear 12 is provided on the upper end of the support 10, and a supporting shaft 13 of the tilting frame 16 is placed in the supporting ear 12.
  • the tilting frame 16 is further provided with a positioning base 17 and another supporting ear is formed on the positioning base 17.
  • the hydraulic system is hinged under the tilting frame through the piston rod of the hydraulic cylinder 19, and the iris of the hydraulic cylinder 19 and the support 20 are hinged.
  • the slag pack 2 has a shaft 21 and positioning 4 to 22, and the positioning shaft cooperates with the supporting ears on the positioning base 17 on the tilting frame.
  • a tundish 3 is provided on the tundish 3.
  • Figures 6 and 7 show that the nozzles of the granulator of the present invention are U-shaped and! ⁇ -Shaped arrangement.
  • the hole diameters 23 of the nozzle holes provided on the side 24 of the granulator 9 which are directly opposite to the slag are not the same.
  • the holes in the bottom row of the holes with a ⁇ -shaped or W-shaped arrangement are larger in diameter than the vertical holes on both sides. Changes between ⁇ 4-14.
  • the angle between the centerlines of the vertical apertures on both sides can be between 0-120. Changes within range.
  • the dust-removing device 6 of the present invention is provided at the periphery of the pool 4.
  • the device is composed of a water pipe 11, and water spray holes are arranged in the water pipe 11.
  • a slag retaining wall 7 is provided on the side of the pool 4 near the granulator.
  • the slag retaining wall is a water-cooled steel jacket. Because of its location between the tundish slag tank and the pool, when special conditions occur, such as sudden power failure Can avoid slag flow Into the pool to completely eliminate the hidden danger of explosion.
  • the water pipe 11 sprays water to form a water curtain around the pool.
  • the cooling and solidification process of the crushed liquid slag droplets is performed in the water curtain, which effectively prevents dust pollution. Adding a dust cover to the outside of the entire pool can effectively prevent water mist and dust mist from spreading and protect the environment.
  • the slag pack 2, the tundish 3, and the tipping mechanism 1 are located on a platform.
  • the cylinder of the hydraulic cylinder 19 is hinged with the support 20 located in the pit.
  • the granulator 9 is provided on the side wall of the platform.
  • a slag retaining wall is arranged between the tundish slag slag tank and the pool.
  • the water consumption is very small, and only the amount of water consumed by evaporation needs to be replenished into the pond. There is no sewage discharge and no secondary pollution will be caused.
  • the optimal gas consumption is 40-60Nm 3 / t slag, while the Fukuyama Iron and Steel Plant in Japan consumes 500-1000Nm 3 / t.
  • the gas source can use a large surplus of nitrogen or steam from the metallurgical plant (compressed air can also be used).
  • the use of nitrogen or steam can prevent the oxidation of residual metals in the slag, which can not only reduce environmental pollution, but also improve the recovery rate of residual metals. It can save a lot of energy and improve the comprehensive benefit of the steel mill.
  • Granulated steel slag is convenient for comprehensive utilization. It is an ideal substitute for the production of cement clinker. With small grains and easy grinding, it is very popular among cement plants.
  • steel slag can also be used as sintering raw material or blast furnace flux, and it can also be used as agricultural phosphate fertilizer after wind crushing in the early stage.
  • the device of the invention is simple, the design is advanced, and the effect is remarkable.
  • the hydraulic tipping mechanism and slag pack are safe and reliable, improving working conditions and productivity.
  • the granulators with different apertures and the spray holes in a "U" or shaped arrangement are scientifically and rationally designed, regardless of whether it is slag or metal liquid, which can be safely granulated and dispersed into the slag pool, with low gas consumption and granulation The rate is high.
  • the slag retaining wall can completely avoid the hidden danger of explosion of slag when it encounters water in the event of a power outage or gas outage.
  • the dust removal device improves the working environment and significantly reduces the dust content in the air.
  • the process and the device of the invention have low investment, high productivity, low energy consumption, comprehensive economic benefits and
  • the environmental protection effect is good, and it can be widely applied to the treatment of converter slag, open hearth, electric furnace steel slag, blast furnace smelting slag and non-ferrous smelting slag in metallurgical industry.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Furnace Details (AREA)
  • Manufacture Of Iron (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

Procédé et récipient de granulation, comportant un mécanisme (1) de basculement d'une poche à boues, une poche à boues (2), un bassin de coulée (3), un granulateur (9), un réservoir à eau (4), une paroi de séparation (7), un dispositif (6) de dépoussiérage par pulvérisation d'eau froide, et un courant d'air (8). Le laitier en fusion est versé dans le bassin à partir de la poche par le mécanisme de basculement, puis il s'écoule dans un chenal de coulée du bassin avant d'être dispersé par de l'air comprimé passant par des petits orifices sensiblement en forme de ou | | situés en amont du granulateur. Enfin, le laitier pénètre dans le dispositif de dépoussiérage où il se refroidit et durcit. Le laitier durci tombe dans le réservoir à eau. Les particules de laitier présentes dans le réservoir à eau sont évacuées par une benne preneuse.
PCT/CN1994/000098 1993-12-11 1994-12-09 Procede et recipient de granulation de laitier utilisant le broyage par air Ceased WO1995015929A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU11901/95A AU683520B2 (en) 1993-12-11 1994-12-09 Slag granulation method and container by air crushing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN93115409A CN1103667A (zh) 1993-12-11 1993-12-11 炉渣气碎粒化工艺及装置
CN93115409.X 1993-12-11

Publications (1)

Publication Number Publication Date
WO1995015929A1 true WO1995015929A1 (fr) 1995-06-15

Family

ID=4991034

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN1994/000098 Ceased WO1995015929A1 (fr) 1993-12-11 1994-12-09 Procede et recipient de granulation de laitier utilisant le broyage par air

Country Status (3)

Country Link
CN (1) CN1103667A (fr)
AU (1) AU683520B2 (fr)
WO (1) WO1995015929A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101691620B (zh) * 2009-09-10 2011-06-08 河北理工大学 一种液态钢渣处理工艺及装置
CN101660012B (zh) * 2009-09-25 2012-07-18 阳谷祥光铜业有限公司 冶金炉渣无水粒化工艺及装置
CN101886148A (zh) * 2010-07-08 2010-11-17 无锡市东方环境工程设计研究所有限公司 高温熔融渣回收方法
CN101886149A (zh) * 2010-07-08 2010-11-17 无锡市东方环境工程设计研究所有限公司 一种高温熔融渣回收方法
CN102329902B (zh) * 2011-10-15 2016-09-07 杜天宇 一种冶金气水连淬的设备结构
CN103710479B (zh) * 2014-01-17 2016-05-18 中冶华天工程技术有限公司 钢渣水淬处理系统
CN115418420B (zh) * 2022-09-26 2023-07-25 马鞍山钢铁股份有限公司 一种改善钢渣风碎结渣的处理装置及其处理方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5620061A (en) * 1979-06-27 1981-02-25 Crompton & Knowles Corp Direct black dye
JPS5919532A (ja) * 1982-07-26 1984-02-01 Nippon Steel Corp 半凝固粒集粒装置
JPS5943807A (ja) * 1982-09-03 1984-03-12 Nippon Kokan Kk <Nkk> タンデイツシユに対する溶融スラグの定量供給方法
CN88211276U (zh) * 1988-05-06 1988-12-21 马鞍山钢铁公司 钢渣风碎粒化装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5620061A (en) * 1979-06-27 1981-02-25 Crompton & Knowles Corp Direct black dye
JPS5919532A (ja) * 1982-07-26 1984-02-01 Nippon Steel Corp 半凝固粒集粒装置
JPS5943807A (ja) * 1982-09-03 1984-03-12 Nippon Kokan Kk <Nkk> タンデイツシユに対する溶融スラグの定量供給方法
CN88211276U (zh) * 1988-05-06 1988-12-21 马鞍山钢铁公司 钢渣风碎粒化装置

Also Published As

Publication number Publication date
AU683520B2 (en) 1997-11-13
AU1190195A (en) 1995-06-27
CN1103667A (zh) 1995-06-14

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