US20070144308A1 - Briquette for use as metal stock and method for manufacturing the same - Google Patents

Briquette for use as metal stock and method for manufacturing the same Download PDF

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Publication number
US20070144308A1
US20070144308A1 US10/592,124 US59212405A US2007144308A1 US 20070144308 A1 US20070144308 A1 US 20070144308A1 US 59212405 A US59212405 A US 59212405A US 2007144308 A1 US2007144308 A1 US 2007144308A1
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US
United States
Prior art keywords
briquette
powder dust
metal
powder
manufacturing
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.)
Abandoned
Application number
US10/592,124
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English (en)
Inventor
Mitsuma Matsuda
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.)
JTEKT Corp
Original Assignee
JTEKT Corp
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 JTEKT Corp filed Critical JTEKT Corp
Assigned to JTEKT CORPORATION reassignment JTEKT CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MATSUDA, MITSUMA
Publication of US20070144308A1 publication Critical patent/US20070144308A1/en
Abandoned legal-status Critical Current

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    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/248—Binding; Briquetting ; Granulating of metal scrap or alloys
    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • 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
    • C22B7/02—Working-up flue dust
    • 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

Definitions

  • the present invention relates to a briquette for use as metal stock and a method for manufacturing the same. Particularly, the invention relates to a technique for effectively utilizing metal-bearing powder dust occurring in steelmaking/smelting processes or the like.
  • the recovery powder dust contains powder metal in an amount on the order of 75 to 95 wt %, offering a potentially effective resource as metal stock.
  • the powder dust is prone to scattering, leading to a disadvantage in the handling operations thereof such as transportation and storage.
  • powder dust bearing ferrous metal powder is prone to ignition and hence, the handling thereof is more difficult.
  • the above briquette is decreased in strength if a content of the powder dust exceeds 10 wt %. Hence, it is essential for the briquette to be composed mostly of the undesired powder coal. Accordingly, an attempt to reuse the powder dust more effectively is disadvantaged in terms of cost. In reality, therefore, the most of the powder dust is committed to landfill disposal as industrial waste. Such a landfill disposal of the powder dust is not favorable from the standpoint of effectively utilizing the resources. What is more, the landfill disposal of the powder dust not only entails the environmental deterioration but also requires a high disposal cost.
  • the invention has been accomplished and has an object to provide a briquette for use as metal stock which provides easy, low-cost reuse of the powder dust, as well as to provide a method for manufacturing the briquette.
  • a briquette for use as metal stock is a dry briquette and is formed by solidifying metal-bearing powder dust using a solidification assistant containing at least one of sodium silicate and colloidal silica.
  • the briquette having such compositions is capable of exhibiting a proper mechanical strength because the solidification assistant comprises at least one of sodium silicate and colloidal silica.
  • the briquette facilitates the handling operations thereof such as transportation and storage. Since a large quantity of powder dust can be solidified using a small quantity of solidification assistant, the briquette of good quality is manufactured at low costs.
  • the briquette is a dry, solid mass so that the briquette, when directly charged into a blast furnace, involves no fear of causing bumping or of being scatteringly carried upward to be discharged from the furnace. Accordingly, the briquette permits the powder dust to be reused as a less-expensive metal stock of good quality, thus contributing to the environmental conservation and to the reduction of the disposal cost of the powder dust.
  • the above briquette may preferably contain the above solidification assistant in an amount of 0.5 to 5.0 wt %, so that the briquette can provide the metal stock of even higher quality.
  • the powder metal may be ferrous metal powder.
  • the briquette can be used as a favorable steelmaking material.
  • a method for manufacturing a briquette for use as metal stock comprises: a step of impregnating water into metal-bearing powder dust; a step of compression molding the powder dust impregnated with water; a step of impregnating the compression-molded powder dust with a solidification assistant containing at least one of sodium silicate and colloidal silica; and a step of drying the powder dust impregnated with the solidification assistant.
  • the powder dust impregnated with water is compression molded so that the powder dust can be solidified to such a degree as not to be detrimental to the handling operations such as transportation. Furthermore, the compression-molded powder dust is impregnated with the solidification assistant containing at least one of sodium silicate and colloidal silica and hence, a large quantity of powder dust can be rigidly solidified using a small quantity of solidification assistant.
  • a method for manufacturing a briquette for use as metal stock comprises: a step of adding a solidification assistant containing at least one of sodium silicate and colloidal silica to metal-bearing powder dust; a step of compression molding the powder dust admixed with the solidification assistant; and a step of drying the compression-molded powder dust.
  • the compression molding of the powder dust permits the solidification assistant added thereto to permeate substantially into the overall mass of the powder dust. Accordingly, a large quantity of powder dust can be rigidly solidified using a small quantity of solidification assistant.
  • the above manufacture method of briquette may further comprise a step of impregnating the powder dust with the solidification assistant containing at least one of sodium silicate and colloidal silica, the step being interposed between the step of compression molding the powder dust and the step of drying the compression-molded powder dust.
  • a briquette further increased in mechanical strength can be obtained.
  • the powder metal may be ferrous metal powder.
  • the above manufacturing methods are particularly preferred as a method for manufacturing a briquette for use as steelmaking material.
  • the powder dust can be solidified to a desired strength by impregnating the powder dust with the solidification assistant or by compression molding the powder dust.
  • the briquette for use as metal stock can be manufactured easily and at low costs.
  • FIG. 1 is a step chart illustrating a method for manufacturing a briquette for use as metal stock according to one embodiment of the invention
  • FIG. 2 is a step chart illustrating a method for manufacturing a briquette for use as metal stock according to another embodiment of the invention
  • FIG. 3 is a step chart illustrating a method for manufacturing a briquette according to still another embodiment of the invention.
  • FIG. 4 is a partially cut-away perspective view showing a briquette.
  • FIG. 1 is a step chart illustrating a method for manufacturing a briquette for use as metal stock according to one embodiment of the invention.
  • metal-bearing powder dust F FIG. 1 ( a )
  • water W is added dropwise to the powder dust F ( FIG. 1 ( b )).
  • the powder dust F occurs in a steelmaking process and is recovered by means of a collector.
  • the powder dust F contains 75 to 95 wt % of ferrous metal powder.
  • the powder dust F with the above solidification assistant D added dropwise is allowed to stand for, say one day, whereby the water W added dropwise is allowed to fully permeate into the powder dust F ( FIG. 1 ( c )).
  • a press is operated for compression molding the powder dust F in a mold 3 , the powder dust having the above water W permeated therein ( FIG. 1 ( d )).
  • the compression molding solidifies the powder dust F to such a strength as not to collapse when transported to the subsequent step.
  • the compression-molded powder dust F is impregnated with the solidification assistant D.
  • the solidification assistant D is impregnated by, for example, dipping the powder dust F in the solidification assistant D filled in a tank 8 as carrying the powder dust on a belt conveyor 7 ( FIG. 1 ( e )).
  • the solidification assistant D filled in the tank 8 is a solution of sodium silicate diluted with water to a concentration on the order of 25 to 35 wt %.
  • the powder dust F impregnated with the solidification assistant D ( FIG. 1 ( f )) is allowed to cure (dry) for say two days or so ( FIG. 1 ( g )), whereby the solidification assistant D is solidified.
  • the powder dust may also be quickly cooled by applying thereto air blow at normal temperatures or cooled air blow.
  • the dry, porous briquette A can be manufactured by performing the above steps.
  • the briquette A may preferably contain 95 to 99.5 wt % of powder dust F and 0.5 to 5.0 wt % of solidification assistant D.
  • the compositions ensure the quality of the briquette as the steelmaking material and also provide easy and rigid solidification of the powder dust F. If the content of the solidification assistant D is less than 0.5 wt %, the resultant briquette has such a low mechanical strength as to be susceptible to fracture during transportation or other handling operations. If the content of the solidification assistant exceeds 5.0 wt %, the content of the ferrous metal is accordingly decreased and hence, the briquette is lowered in the quality as the steelmaking material.
  • the briquette A manufactured by performing the above steps is a porous mass formed by solidifying the powder dust F, such that the briquette can be readily and assuredly removed of water by curing. Therefore, when the briquette is directly charged into a blast furnace, the briquette involves no fear of causing bumping or of being scatteringly carried upward to be discharged from the furnace. Furthermore, the briquette can exhibit a proper degree of mechanical strength to facilitate the handling operations thereof such as transportation and storage, because the briquette uses sodium silicate as the solidification assistant D. What is more, the briquette A is composed mostly of the powder dust F so that the briquette contains a substantial quantity of ferrous metal and is manufactured at low costs. Accordingly, the briquette permits the powder dust F to be reused as a less-expensive steelmaking material of high quality.
  • FIG. 2 is a step chart illustrating a method for manufacturing a briquette according to another embodiment of the invention.
  • the solidification assistant D is first added dropwise to the dust F bearing the ferrous metal powder ( FIG. 2 ( a )) being carried on, for example, the belt conveyor 1 ( FIG. 2 ( b )).
  • a 30-50% sodium silicate solution is used as the solidification assistant D.
  • the press is operated for compression molding the powder dust F added with the solidification assistant D in the mold 3 ( FIG. 2 ( c )).
  • the solidification assistant D added to the powder dust F is allowed to permeate substantially into the overall mass of the powder dust F.
  • the powder dust F impregnated with the solidification assistant D ( FIG. 2 ( d )) is allowed to cure (dry) for say two days ( FIG. 2 ( e )), thereby solidifying the solidification assistant D.
  • the briquette A for use as metal stock ( FIG. 2 ( f )).
  • the dry, porous briquette A can be manufactured by performing the above steps. It is also preferred that the briquette A contains 95 to 99.5 wt % of powder dust F and 0.5 to 5.0 wt % of solidification assistant D.
  • the compositions ensure the quality of the briquette as the steelmaking material and also provide the easy and rigid solidification of the powder dust F.
  • the compression molding step permits the solidification assistant D to permeate substantially into the overall mass of the powder dust F, so that the briquette A as the final product may have a further increased mechanical strength.
  • FIG. 3 is a step chart illustrating a method for manufacturing a briquette according to still another embodiment of the invention. This embodiment differs from the embodiment shown in FIG. 2 in that an additional step of impregnating the powder dust F with the solidification assistant D is interposed between the step of compression molding the powder dust F and the step of drying the compression-molded powder dust F.
  • the solidification assistant D can be impregnated by, for example, dipping the compression-molded powder dust F in the solidification assistant D filled in the tank 8 as carrying the powder dust on the belt conveyor 7 ( FIG. 3D )
  • the solidification assistant D filled in the tank 8 is a solution of sodium silicate diluted with water. This ensures that the solidification assistant D favorably permeates into the compression-molded powder dust F.
  • the embodiment is adapted to further increase the mechanical strength of the briquette A.
  • colloidal silica and a mixture of sodium silicate and colloidal silica can be also used as the solidification assistant D in any of the above embodiments.
  • Any of these solidification assistants is capable of readily and rigidly solidify the powder dust F.
  • the briquette A may have not only a circular cylindrical shape shown in FIG. 1 to FIG. 3 , but also a pillow-like shape, such as of eggs, almond, rug by ball and the like.
  • the pillow-like shape has a rounded circumferential edge and is gradually increased in thickness from the circumferential edge toward its center ( FIG. 4 ). Molding the powder dust into such a shape provides the briquette A which is hard to collapse against a compressive load and is less susceptible to partial fracture at its corner or the like.
  • the briquette A may also be formed by solidifying powder dust F bearing any of the various powder metals with the solidification assistant D.
  • the powder metals include copper, lead, tin oxide, brass and the like, which occur in metal smelting processes. In this case, the briquette can be effectively reused as a metal stock according to the type of the powder metal.
  • any of the briquettes A may preferably contain the powder dust F in an amount of 75 wt % or more from the standpoint of ensuring the quality as the metal stock.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Processing Of Solid Wastes (AREA)
US10/592,124 2004-03-12 2005-03-10 Briquette for use as metal stock and method for manufacturing the same Abandoned US20070144308A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2004-071191 2004-03-12
JP2004071191A JP2005256116A (ja) 2004-03-12 2004-03-12 金属原料用のブリケット及びその製造方法
PCT/JP2005/004230 WO2005087956A1 (ja) 2004-03-12 2005-03-10 金属原料用のブリケット及びその製造方法

Publications (1)

Publication Number Publication Date
US20070144308A1 true US20070144308A1 (en) 2007-06-28

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US10/592,124 Abandoned US20070144308A1 (en) 2004-03-12 2005-03-10 Briquette for use as metal stock and method for manufacturing the same

Country Status (6)

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US (1) US20070144308A1 (ja)
EP (1) EP1734138A4 (ja)
JP (1) JP2005256116A (ja)
KR (1) KR20060133003A (ja)
CN (1) CN1930312A (ja)
WO (1) WO2005087956A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070163389A1 (en) * 2004-02-25 2007-07-19 Mitsuma Matsuda Briquette for use as steelmaking material and method of manufacturing the same

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5160848B2 (ja) * 2007-09-18 2013-03-13 株式会社神戸製鋼所 油分含有製鉄所ダストを用いた炭材内装ブリケットの製造方法
BR112012011771B1 (pt) * 2009-11-17 2019-10-08 Vale S.A. Aglomerado de finos de minério a ser usado em um processo de sinterização, e método para produção de aglomerado de finos de minério
CN101818226A (zh) * 2010-05-14 2010-09-01 贵州英吉尔机械制造有限公司 合成铸铁的炉料配比及其制备气缸盖铸件的方法
WO2013079647A1 (en) 2011-12-01 2013-06-06 Global Telecom Organisation S.A. Powder binding process
CN103589863A (zh) * 2013-11-08 2014-02-19 乔安平 炼钢用金属粉料成块技术

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3316083A (en) * 1964-06-10 1967-04-25 Mueller Co Briquetting of foundry materials
US20020152843A1 (en) * 2000-08-10 2002-10-24 Masataka Ishihara Briquette as material for steel making and method for production thereof
US20030075014A1 (en) * 2000-10-02 2003-04-24 Masataka Ishihara Brittle formed product and iron-based power material and method for manufacturing these materials

Family Cites Families (11)

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JPS53104514A (en) * 1977-02-25 1978-09-11 Akira Konishi Method of reusing dust produced in producing ferrosilicon
JP2001214222A (ja) * 2000-01-31 2001-08-07 Oji Cornstarch Co Ltd 製鋼ダスト塊成及びその製造方法
JP3711045B2 (ja) * 2000-08-10 2005-10-26 光洋精工株式会社 製鋼原料用のブリケット
JP3711046B2 (ja) * 2000-08-10 2005-10-26 光洋精工株式会社 製鋼原料用ブリケットの製造方法
JP3745657B2 (ja) * 2000-08-10 2006-02-15 光洋精工株式会社 製鋼原料用ブリケットの製造方法
JP3774652B2 (ja) * 2000-10-02 2006-05-17 株式会社ジェイテクト 固形物原料用粉体及びその製造方法
JP3789796B2 (ja) * 2000-10-02 2006-06-28 株式会社ジェイテクト 鉄系粉末材及びその製造方法
JP3746978B2 (ja) * 2000-10-11 2006-02-22 光洋精工株式会社 製鋼原料用ブリケットの製造方法
RU2197544C2 (ru) * 2001-04-11 2003-01-27 Общество с ограниченной ответственностью "Машгео ТНТЦ" Брикет для металлургического производства и способ изготовления брикетов
JP3709375B2 (ja) * 2002-01-31 2005-10-26 光洋精工株式会社 ブリケットの製造方法
JP2004076148A (ja) * 2002-08-15 2004-03-11 Mettsu Corporation:Kk 製鉄原料

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3316083A (en) * 1964-06-10 1967-04-25 Mueller Co Briquetting of foundry materials
US20020152843A1 (en) * 2000-08-10 2002-10-24 Masataka Ishihara Briquette as material for steel making and method for production thereof
US20030075014A1 (en) * 2000-10-02 2003-04-24 Masataka Ishihara Brittle formed product and iron-based power material and method for manufacturing these materials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070163389A1 (en) * 2004-02-25 2007-07-19 Mitsuma Matsuda Briquette for use as steelmaking material and method of manufacturing the same

Also Published As

Publication number Publication date
KR20060133003A (ko) 2006-12-22
EP1734138A1 (en) 2006-12-20
CN1930312A (zh) 2007-03-14
WO2005087956A1 (ja) 2005-09-22
EP1734138A4 (en) 2008-09-10
JP2005256116A (ja) 2005-09-22

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AS Assignment

Owner name: JTEKT CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MATSUDA, MITSUMA;REEL/FRAME:018354/0326

Effective date: 20060907

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION