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WO2009014255A1 - Matière d'agglomération de poudre de minerai servant à accroître la résistance à chaud, boulette formée avec celle-ci et procédé servant à produire celle-ci - Google Patents

Matière d'agglomération de poudre de minerai servant à accroître la résistance à chaud, boulette formée avec celle-ci et procédé servant à produire celle-ci Download PDF

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Publication number
WO2009014255A1
WO2009014255A1 PCT/JP2008/063709 JP2008063709W WO2009014255A1 WO 2009014255 A1 WO2009014255 A1 WO 2009014255A1 JP 2008063709 W JP2008063709 W JP 2008063709W WO 2009014255 A1 WO2009014255 A1 WO 2009014255A1
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WIPO (PCT)
Prior art keywords
parts
ore powder
hot strength
solidified material
slag
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/JP2008/063709
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English (en)
Japanese (ja)
Inventor
Taiichiro Mori
Ryoetsu Yoshino
Atsumu Ishida
Tetsuya Ando
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.)
Denka Co Ltd
Original Assignee
Denki Kagaku Kogyo KK
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 Denki Kagaku Kogyo KK filed Critical Denki Kagaku Kogyo KK
Priority to CN2008800251233A priority Critical patent/CN101755064B/zh
Priority to JP2009524536A priority patent/JP5474543B2/ja
Priority to KR20107000415A priority patent/KR101489537B1/ko
Priority to BRPI0814206-8A priority patent/BRPI0814206B1/pt
Publication of WO2009014255A1 publication Critical patent/WO2009014255A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • C04B18/02—Agglomerated materials, e.g. artificial aggregates
    • C04B18/021—Agglomerated materials, e.g. artificial aggregates agglomerated by a mineral binder, e.g. cement
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0046—Making spongy iron or liquid steel, by direct processes making metallised agglomerates or iron oxide
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • 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
    • C22B1/2406—Binding; Briquetting ; Granulating pelletizing
    • 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
    • C22B1/2413—Binding; Briquetting ; Granulating enduration of pellets
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00215—Mortar or concrete mixtures defined by their oxide composition

Definitions

  • the present invention relates to a hot-strength solidifying material for ore powder used for pelletizing ore powder generated at steelworks, steelworks, and non-ferrous steel mills, pellets using the same, and a method for producing the same.
  • pelletizing of ore powder has been carried out against the background of effective use of ore powder such as dust generated in steel mills, steel mills, and non-ferrous steel mills, and the depletion of high-quality mineral resources.
  • Known pelletizing methods for ore powder include a baking pellet method that uses a drum-type or bread-type granulator for baking after granulation, and a cold pellet method that omits the baking process for the purpose of energy saving.
  • the ore powder solidifying material used in the pelletizing method of these ore powders is usually solidified material made of Portland cement, solidified material made of quick lime and blast furnace slag, solidified material made of calcium aluminate compound and finely divided inorganic material. Solidified materials made of wood, ordinary portland cement and calcium aluminate are known (see Non-Patent Document 1, Non-Patent Document 2, Patent Document 1, and Patent Document 2).
  • the hot strength refers to, for example, the compressive strength after firing at 600 to 1,000 ° C after putting pellets using ore powder and its solidified material with increased hot strength into the blast furnace.
  • Normal In solidified material using Portland cement is about 3 ⁇ 5 N / mm 2.
  • the cold strength, after curing outdoors, the compressive strength of the just prior to charging to the blast furnace and fingers are usually required about 3 ⁇ 10N / mm 2.
  • Non-Patent Document 1 Shigeru Amano, Yukihiro Abe, Naru Yamaro, Hironao Matsuoka, Masaichi Takano, Mio Aida, Kazuyuki Morita, Development of cementless cold pellets, Iron and Steel, 77th (1991) 6th No., pp. 45-52
  • Non-Patent Document 2 Masanori Nakano, Masaaki Naito, Kenichi Higuchi and Koji Morimoto, Non-spherical Carbon Composite Agglomerates: Lab-scale Manufacture and Quality Assessment, ISIJ International, Vol. 44, No. 12, pp. 2079 ⁇ 2085 (2004)
  • Patent Document 1 Japanese Patent Application Laid-Open No. 05-5 1 7 1 300
  • Patent Document 2 Japanese Patent Publication No. 0 5-0 7 3 7 0 7 Disclosure of Invention
  • the object of the present invention is to provide an ore powder hot strength enhanced solidified material having a cold strength equal to or higher than that of a conventional ore powder solidified material and excellent in hot strength, and a pellet using the same. , And a method for manufacturing the same. Means for solving the problem
  • the present invention includes: any one or two or cement or lime, made by blending slag, the ⁇ Pi ⁇ acid substances, chemical composition, Ca0, AI2O3, total in ⁇ Pi Si0 2, CaO 3 to 56%, A1 20 3 is 3-40%, and Si0 2 is 31-86%, which is a solidified material for increasing the hot strength of ore powder, one or two types of cement and lime, and slag , And a solidifying material in which the mixing ratio of the siliceous substance is 1 to 76 parts of cement or lime, 2 to 76 parts of slag, and 2 to 95 parts of siliceous substance, a solidifying material Si0 2 component of the material is 45% or more, further solidifying comprising a gypsum The solidifying material is less than 5 parts in 100 parts of the solidifying material, and further includes the water reducing agent.
  • the water reducing agent is 100 parts of the solidifying material. 0.5 to 5 parts of the solidifying material, and the water reducing agent is R10 (A10) mR2 [wherein A10 is one or a mixture of two or more oxyalkylene groups having 2 to 3 carbon atoms.
  • R1 is an alkenyl group having 2 to 5 carbon atoms
  • R2 is an alkyl group having 1 to 4 carbon atoms
  • m is an average added mole number of an oxyalkylene group of 20 to 150]
  • Z [0 (A20) nR3] a [wherein Z is a compound containing 2 to 8 hydroxyl groups
  • A20 is a residue of one or a mixture of two or more oxyalkylene groups having 2 to 3 carbon atoms.
  • R3 is an alkenyl group having 2 to 5 carbon atoms
  • n is an average addition number of oxyalkylene groups, and is 0 or 1 or more
  • a is 2 to 8
  • a solidified material comprising a copolymer of a polyalkenyl ether represented by the formula (1) and maleic anhydride, and a pellet comprising ore powder, the solidified material, and water, wherein the solidified material is 3 to 20 parts of the pellets with respect to 100 parts of ore powder, and the pellets having a water Z (ore powder + solidifying material) ratio of 0.03 to 0.3. It is a manufacturing method of G.
  • the invention's effect comprising a copolymer of a polyalkenyl ether represented by the formula (1) and maleic anhydride, and a pellet comprising ore powder, the solidified material, and water, wherein the solidified material is 3 to 20 parts of the pellets with respect to 100 parts of ore powder, and the pellets having a water Z (
  • the cold strength is equal to or higher than that of the conventional solidified material, and the hot strength is enhanced, and the hot strength enhanced solidified material of ore powder, pellets using the same, and production thereof Can provide a method.
  • Figure 1 shows the effect of water reducing agents on room temperature strength and slow cooling strength (hot strength).
  • Fig. 2 shows the effect of gypsum (when a water reducing agent is added) on room temperature strength and slow cooling strength (hot strength).
  • the present invention relates to a solidified material for increasing the hot strength of ore powder, which has a specific chemical composition, containing cement, slag, and a siliceous substance.
  • the cement used in the present invention is not particularly limited, and ordinary cement can be used. Specifically, various Portland cements such as normal, early strength, ultra-early strength, moderate heat, and low heat, filler cement in which these limestone cements are mixed with limestone fine powder, waste-based cement, so-called eco cement One or more of these can be used in combination.
  • the lime used in the present invention refers to quick lime whose chemical formula is represented by CaO and slaked lime whose chemical formula is represented by Ca (0 H) 2 .
  • quick lime is not particularly limited, industrial products with a calcium oxide (CaO) content of 90% or more can usually be used, and slaked lime is not particularly limited, but calcium oxide (CaO ) Can use 65% or more industrial products. These can also be used in combination.
  • CaO calcium oxide
  • the particle size of the lime, Blaine specific surface area value (hereinafter, referred to as Blaine value), 2, 000Cm is preferably not less than 2 / g, 3,000cm 2 / g or more is more preferable. Outside this range, the expression of cold strength and hot strength may be reduced.
  • the slag used in the present invention includes blast furnace water slag produced as a by-product when producing pig iron in the blast furnace, blast furnace slow-cooled slag, and converter slag produced in the steelmaking process. Steelmaking slag such as furnace slag can be used, and one or more of these can be used, and blast furnace granulated slag is preferred from the viewpoint of economy and availability.
  • the particle size of the slag, in Blaine value, 2, 000Cm is preferably not less than 2 / g, 3, 000cm 2 / g or more is more preferable. Outside this range, the expression of cold strength and hot strength may be reduced.
  • the siliceous material used in the present invention refers to a Si0 2 component of 45% or more including the material as chemical components, for example, silica fume, fly ash, coarse ash (coal ash), volcanic ash, diatomaceous earth, silicate clay , Fused silica, shirasu balloon, silica sand, rice husk ash (rice husk ash), etc., one or more of which can be used. Of these, the use of fly ash is preferred from the economic viewpoint. ,
  • the particle shape of the siliceous substance is preferably spherical from the viewpoint of particle filling properties and neck growth during sintering reaction.
  • siliceous substance that does not contain sodium, potassium, and phosphorus components that hinder the operation of the blast furnace.
  • the particle size of the siliceous substance is preferably 2, OOOcmVg or more, more preferably 3,000cmVg or more, in terms of Blaine value. Outside this range, there is a risk that the coldness and hot strength will be reduced.
  • the mixing ratio of one or two types of cement or lime and slag and siliceous material is not particularly limited, but one or two types of cement or lime 1 to 76 parts, slag 2 to 95 parts and 2 to 95 parts of siliceous material are preferred.
  • cement When cement is used, 1 to 76 parts of cement, 2 to 76 parts of slag, and 2 to 95 parts of siliceous material are more preferred, and 3 to 75 parts of cement, 4 to 74 parts of slag, and siliceous material 4 ⁇ 85 parts is particularly preferred.
  • lime lime 1-50 parts, slag 2-95 parts, and siliceous substance 3-95 parts are more preferable, lime 2-48 parts, slag 4-93 parts, and siliceous substance 5- 93 parts are particularly preferred. Outside this range, there is a risk that sufficient cold strength and hot strength may not be obtained.
  • one or two types of cement and lime, slag, and siliceous material are blended, and the chemical composition is Ca0, A1 2 0 3 and The total strength of SiO 2 is CaO force S 3 ⁇ 56%, A1 2 0 3 is 3 ⁇ 40%, and Si0 2 is 30 ⁇ 86%. Can be made to contain gypsum.
  • Examples of the gypsum include dihydrate gypsum, hemihydrate gypsum, type II anhydrous gypsum, or type II type anhydrous gypsum, among which type II anhydrous gypsum and type III anhydrous gypsum are preferable.
  • the gypsum content is preferably less than 5 parts, more preferably less than 3 parts. If the gypsum content exceeds this range, the hot strength may decrease.
  • the particle size of gypsum is preferably 2, OOOcmVg or more, more preferably 3, OOOcmVg or more in terms of the brane value. Outside this range, the expression of cold strength and hot strength may be reduced.
  • water reducing agents include alkylaryl sulfonates, naphthalene sulfonates, formalin condensates of melamine sulfonates, polycarboxylsan-based high molecular compounds, and the like. It uses a water reducing agent and can be either liquid or powder.
  • R10 (A10) mR2 [However, A10 is one or a mixture of two or more oxyalkylene groups having 2 to 3 carbon atoms.
  • R1 is an alkenyl group having 2 to 5 carbon atoms
  • R2 is an alkyl group having 1 to 4 carbon atoms
  • m is an average addition mole number of an oxyalkylene group of 20 to 150.
  • Alkenyl ether, and Z [0 (A20) nR3] a [wherein Z is a residue of a compound containing a hydroxyl group having 2 to 8; A20 is one kind of oxyalkylene group having 2 to 3 carbon atoms; Or a mixture of two or more types, and when two or more types are added, they may be added in blocks or randomly, R3 is an alkenyl group having 2 to 5 carbon atoms, and n is an oxyalkylene group The average added mole number is 0 or 1 or more, and a is 2 to 8.] With the use of water-reducing agent comprising a copolymer of anhydrous Ma maleic acid are preferred.
  • the amount of water reducing agent used is preferably 0.5 to 8 parts, and 1 to 6 parts per 100 parts of the solidifying material. More preferred. Less than 5 parts is not effective, and more than 8 parts is not preferable because improvement in hot strength is not recognized or uneconomical.
  • blast furnace cement can be used as cement and slag
  • mixed cement of silica cement or fly ash cement can be used as cement and siliceous material.
  • the chemical composition of the solidified material is CaO 3 to 56%, A1 20 3 3 to 40%, and Si0 2 30 to 86% in the total of Ca0, A1 20 3 and Si0 2 , and CaO 7 to 45 %, AI2O3 5 to 35%, S1O2 32 to 76% are preferable. Outside this range, sufficient hot strength may not be obtained.
  • the method of mixing these materials used is not particularly limited, and it is possible to mix in advance before pelletizing, or to mix each material used during pelletizing.
  • the particle size of the solidifying material is a Blaine value, 2 is preferably at least OOOcmVg, 4, 000cm 2 / g or more on a more preferred. Outside this range, the cold strength may decrease.
  • the amount of the solidified material used is preferably 3 to 20 parts, more preferably 5 to 15 parts with respect to 100 parts of ore powder. If it is less than this range, the expression of cold strength and hot strength may be poor, and if it exceeds this range, it will be uneconomical.
  • the ratio of water (ore powder + solidified material) is not particularly limited, but is preferably 0.03 to 0.3, more preferably 0.05 to 0.2. Below this range, the cold strength may be poor, and the reduction reaction after charging the blast furnace may be poor.
  • water reducing agent high performance water reducing agent
  • the method for producing pellets using the solidified material is not particularly limited.
  • a pressure molding method for example, in addition to granulation using a drum-type or bread-type granulator, a pressure molding method, a wet pressure molding method, And an extrusion molding method.
  • the curing method of the manufactured pellets is not particularly limited, and examples include normal temperature and normal pressure curing, autoclave curing, steam curing, wet air curing, and heating curing.
  • the prepared pellets were cured by normal temperature and pressure curing, and the cold strength and hot strength of the pellets were measured. The results are also shown in Table 1.
  • Cement a manufactured by Denki Kagaku Kogyo Co., Ltd., trade name “ordinary Portland cement”, brain value 3,150cm 2 / g, specific gravity 3.13, CaO 72%, AI2O3 6%, S 1O2 22%
  • Slag Blast furnace slag, manufactured by Nippon Steel Blast Furnace Cement Co., Ltd., trade name “ESMENT SUPER 1 60 P ”, Blaine value 6,000 cm 2 / g, Specific gravity 2.91, CaO 49%, AI2O3 16%, S1O2 35% Silicate substance A: Fly ash, coal-fired power plant, JIS type II compliant product, Brain value 3,700cm 2 / g, specific gravity 2.35, CaO 6%, A1 2 0 3 27%, S1O2 67%
  • Silicic substance B Fly ash, coal-fired power plant, JIS type II compliant product, brane value 3,700cm 2 / g, specific gravity 2.35, CaO 0%, AI2O3 32%, S1O2 68%
  • Silicic substance C fly ash, coal-fired power plant, JIS II compliant product, brane value 3,700cm 2 / g, specific gravity 2, 37, CaO 0%, A1 2 0 3 46%, S1O2 54%
  • Silicic substance D fused silica, manufactured by Denki Kagaku Kogyo Co., Ltd., trade name “den-force fused silica”, BET specific surface area value 11.3m 2 / g, specific gravity 2.26, CaO 0%, AI2O3 0%, Si0 2 100 %
  • Silicic substance E Masagome earth powder, manufactured by Izumi Kogyo Co., Ltd., Brain value 10,400cm 2 / g, Specific gravity 3.63, CaO 3%, A1 2 0 3 34%, Si0 2 63%
  • Silicic substance F ⁇ -2Ca0-SiOs, reagent calcium carbonate and reagent silica are blended so that the molar ratio of CaOZSi0 2 is 2.0 and calcined in an electric furnace at a temperature of 1,500 ° C. Synthesized. The resulting fired product was cooled to a brain value of 6,000 cm 2 / g. Specific gravity 3.01, Ca 0 63%, AI2O3 2%, Si0 2 35%
  • Ore powder iron ore powder, hematite ore, specific gravity 4.95, 3 sieves
  • Hot strength The prepared pellets were cured at room temperature and normal pressure in a room temperature environment of 20 ° C, and fired at a maximum temperature of 860 ° C at a heating rate of 10 ° C / min in a nitrogen atmosphere at a temperature of 14 days. After reaching temperature, it was taken out of the furnace and the compressive strength was measured. table 1
  • the solidified material exhibits a cold strength equal to or higher than that of the comparative example and is excellent in hot strength expression by appropriately blending cement, slag, and siliceous material. .
  • CaO, AI2O3, and Si0 total in 2 CaO is 3 to 56% A1 2 0 3 3 to 40%, and S i0 2 is 30 to 86 percent" within the chemical composition of the present invention in
  • the pellets using solidified material are excellent in both cold and hot strength (Experiment No. 1-2 to 1-6, No. 1-9 to 1-13, No. 1-15 to 1-20, 1-22, 1-23).
  • CaO is less than 3%, the hot strength is high but the cold strength is extremely reduced (Experiment No. 1-1).
  • CaO exceeds 56% the cold strength is high but the hot strength is high. of expressing is not sufficient (No.
  • experiment 1-7) the A1 2 0 3 is less than 3%, hot strength is high but reduces the cold strength (experiment No. l-8), A1 When 2 0 3 exceeds 40%, cold strength, hot strength of decreases both (experiment No. 1-14), the Si0 2 is less than 30%, cold strength is high hot strength instead of expressing enough, the Si0 2 exceeds 86%, cold strength, since hot strength is reduced to co (experiment No. 1-21), the chemical composition of the solidifying material, the above range is preferable.
  • Cement, slag, and siliceous materials are (part) From the results in Table 2, it can be seen that the solidified material is excellent in improving the hot strength. In other words, the solidified material should have a cold strength equal to or higher than that of the comparative example by appropriately blending cement, slag, and siliceous material, and exhibit excellent hot strength. Recognize.
  • Cement b Medium-heated Portland cement, manufactured by Denki Kagaku Kogyo Co., Ltd., trade name “Den force medium-heated Portland cement”, brane value 3, 050 cmVg, specific gravity 3.20, CaO 70%, A 1 2 . 3 4%, Si0 2 26%
  • Blast Furnace Cement manufactured by Denki Kagaku Kogyo Co., Ltd., trade name “Den Power Blast Furnace Cement”, Blaine value 3. 970cm 2 / g, Specific gravity 3, 05, CaO 63%, A1 2 0 3 9%, S 1O2 28%
  • Fly ash cement manufactured by Denki Kagaku Kogyo Co., Ltd., trade name “Denka Fly Ash Cement (Type B)”, Brain value 3, 500 cm 2 / g, Specific gravity 2. 96, CaO 71%, AI2O3 5%, Si0 2 24%
  • the hot strength-enhanced solidifying material of the present invention is excellent in improving the hot strength regardless of the type of cement. It can also be seen that the functions of the present invention can be expressed by appropriately blending blast furnace cement and siliceous material, fly ash cement and slag.
  • the solidified material can improve the cold strength by containing an appropriate amount of gypsum.
  • the hot-strength-enhanced solidifying material of the present invention can improve the cold strength as compared with the comparative example by appropriately blending cement, slag, siliceous material, and gypsum, and has high hot strength. It can be seen that the expression is excellent.
  • Solidifying material is 100 parts of ore powder.
  • this solidified material shows a cold strength equivalent to or better than that of the comparative example by blending an appropriate amount into the ore powder, and has excellent hot strength. Recognize.
  • Water is based on the sum of the ore powder and the solidified material (mass ° / 0 )
  • this solidified material can improve the hot strength by adjusting the water Z (ore powder + solidified material) ratio to an appropriate range.
  • the hot-strength-enhanced solidifying material of the present invention contains cement, slag, and siliceous material, and has an appropriate ratio of water (ore powder + main-solidifying material). It can be seen that it exhibits strength and exhibits excellent hot strength.
  • Cement a 32 parts, slag 44 parts, and siliceous substance A24 parts were used to prepare a solidified material, 100 parts of iron ore powder were mixed with 13 parts of the prepared solidified material, and iron ore and the prepared solidified material were mixed.
  • a pellet was prepared by blending 15 parts of water with a total of 100 parts.
  • Heat curing After producing pellets, they were sealed and cured for one day at room temperature at 20 ° C. After curing for one day in a 20 ° C environment, it was cured in a dryer at 40 ° C for 13 days.
  • Water reducing agent is 100 parts of solidification material (part)
  • the hot-strength-enhanced solidifying material of the present invention can improve the cold-strength as compared with the comparative example by appropriately blending cement, slag, siliceous substance, gypsum, and water reducing agent, and heat. It can be seen that the interstitial strength is excellent.
  • Gypsum is 100 parts of solidified material (part)
  • Lime a Quick lime, manufactured by Wako Pure Chemical Industries, special grade for reagent, ground product, plain value 6,000cm 2 / g, specific gravity 3.31, CaO 100%, AI2O3 0%, Si0 20 %
  • the solidified material is excellent in improving the hot strength. That is, the solidified material has a cold strength equal to or higher than that of the comparative example by appropriately mixing lime, slag, and siliceous material, and has excellent hot strength. I understand.
  • A1 2 0 3 is less than 3% or A1 2 0 3 exceeds 40%, hot strength is high but cold during strength decreases (experiment No. 10-8, experiment No. 10- 14), Si0 if 2 is less than 30%, cold strength is high not sufficient expression of the hot strength (experiment No . 10 - 15), the Si0 2 exceeds 86%, since the hot strength is high cold strength is extremely decreased (experiment No. 10- 21), the chemical composition of the solidifying material, the above range is preferable.
  • Lime b Slaked lime, manufactured by Wako Pure Chemical Industries, reagent grade, powdered product, brane value 6,000cm 2 / g, specific gravity 2.08, CaO 100%, Al 2 0a 0%, Si0 20 %
  • the solidified material is excellent in improving the hot strength. That is, the solidified material has a cold strength equal to or higher than that of the comparative example by appropriately mixing lime, slag, and siliceous material, and has excellent hot strength. I understand.
  • this solidified material is excellent in improving hot strength.
  • this solidified material shows a cold strength equal to or higher than that of the comparative example by mixing lime, slag, and siliceous material appropriately, and has excellent hot strength. I understand that.
  • the solidified material is excellent in improving the hot strength.
  • this solidified material shows a cold strength equal to or higher than that of the comparative example by mixing lime, slag, and siliceous material appropriately, and has excellent hot strength. I can speak.
  • Anhydrous gypsum Thai type II natural anhydrous gypsum, brane value 8, 100cm 2 / g, specific gravity 2.94, Ca 0 95%, AI2O3 2%, Si0 2 3% Table 1 4
  • this solidified material can improve the cold strength compared with the comparative example by combining lime, slag, siliceous substance, and gypsum appropriately, and has excellent expression of hot strength. I understand that.
  • Solidifying material is 100 parts of ore powder. From the results shown in Table 15, the solidified material should have a cold strength equivalent to or better than that of the comparative example by blending an appropriate amount into the ore powder, and has excellent hot strength. I understand.
  • Water is (%) of the sum of ore powder and this solidified material.
  • this solidified material can improve the hot strength by adjusting the water (ore powder + solidified material) ratio to an appropriate range.
  • this solidified material contains lime, slag, and siliceous material and has an appropriate ratio of water (ore powder + main solidified material) to show a cold strength equal to or higher than that of the comparative example. In other words, it can be seen that the hot strength is excellent.
  • the ore powder hot solidified material according to the present invention not only exhibits a cold strength equivalent to or better than that of a conventional solidified material, but also exhibits good hot strength. It can be suitably used for pelletizing dust collection dust generated in steelworks and non-ferrous steel mills.

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  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention concerne une matière d'agglomération de poudre de minerai laquelle est destinée à être utilisée pour accroître la résistance à chaud lors du bouletage d'une poudre de minerai. Ladite matière d'agglomération donne une résistance à froid supérieure ou égale à celle donnée par des matières d'agglomération classiques et elle est excellente pour conférer une résistance à chaud. L'invention concerne également une boulette formée avec la matière d'agglomération et un procédé servant à produire la boulette. La matière d'agglomération de poudre de minerai servant à accroître la résistance à chaud comprend l'un ou l'autre du ciment et de la chaux ou les deux, du laitier et une substance siliceuse et a une composition chimique comprenant CaO, Al2O3 et SiO2, les teneurs en CaO, Al2O3 et SiO2 étant de 3-56 %, 3-40 % et 30-86 %, respectivement, sur la base de la somme de ceux-ci. La matière d'agglomération peut en être une dans laquelle la proportion de l'un ou l'autre du ciment et de la chaux ou des deux est de 1-76 parties, celle du laitier est de 2-95 parties et celle de la substance siliceuse est de 2-95 parties. La matière d'agglomération peut en être une qui comprend en plus du gypse. La boulette comprend une poudre de minerai, la matière d'agglomération et de l'eau. La boulette peut en être une dans laquelle la quantité de la matière d'agglomération est de 3-20 parties pour 100 parties de la poudre de minerai et le rapport eau/(poudre de minerai + matière d'agglomération) est de 0,03-0,3.
PCT/JP2008/063709 2007-07-25 2008-07-24 Matière d'agglomération de poudre de minerai servant à accroître la résistance à chaud, boulette formée avec celle-ci et procédé servant à produire celle-ci Ceased WO2009014255A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN2008800251233A CN101755064B (zh) 2007-07-25 2008-07-24 矿石粉的热强度增强固化材料、使用该材料的粒料及其制造方法
JP2009524536A JP5474543B2 (ja) 2007-07-25 2008-07-24 鉄石粉の熱間強度増進固化材、それを用いたペレット、及びその製造方法
KR20107000415A KR101489537B1 (ko) 2007-07-25 2008-07-24 광석분의 열간 강도증진 고화재, 이를 이용한 펠릿, 및 그 제조방법
BRPI0814206-8A BRPI0814206B1 (pt) 2007-07-25 2008-07-24 Agglutinating material for increasing heat resistance of oil powder and method of obtaining pellets from agglutinating material

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2007193047 2007-07-25
JP2007-193047 2007-07-25
JP2007-203086 2007-08-03
JP2007203086 2007-08-03

Publications (1)

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WO2009014255A1 true WO2009014255A1 (fr) 2009-01-29

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PCT/JP2008/063709 Ceased WO2009014255A1 (fr) 2007-07-25 2008-07-24 Matière d'agglomération de poudre de minerai servant à accroître la résistance à chaud, boulette formée avec celle-ci et procédé servant à produire celle-ci

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JP (1) JP5474543B2 (fr)
KR (1) KR101489537B1 (fr)
CN (1) CN101755064B (fr)
BR (1) BRPI0814206B1 (fr)
WO (1) WO2009014255A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011118738A1 (fr) * 2010-03-25 2011-09-29 株式会社神戸製鋼所 Composition de briquette d'oxyde de fer contenant un matériau carboné, procédé de fabrication de cette dernière et procédé de fabrication du fer réduit à l'aide de cette dernière
JP2020204078A (ja) * 2019-06-18 2020-12-24 日本製鉄株式会社 高炉用非焼成塊成鉱の製造方法
WO2022056560A1 (fr) * 2020-09-14 2022-03-17 Mintek Liant pour un procédé d'agglomération

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101366167B1 (ko) * 2013-01-21 2014-02-25 주식회사 제철세라믹 소결용 결합제 및 상기 결합제와 자철광 극미분 철광석을 이용한 소결광 펠렛의 제조방법
CN104993031B (zh) 2015-06-12 2018-03-06 映瑞光电科技(上海)有限公司 高压倒装led芯片及其制造方法

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JP2007191748A (ja) * 2006-01-18 2007-08-02 Nippon Steel Corp 炭材含有ペレットの製造方法
JP5073707B2 (ja) * 2009-05-19 2012-11-14 文化シヤッター株式会社 開閉体の連結支持構造

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JP2007191748A (ja) * 2006-01-18 2007-08-02 Nippon Steel Corp 炭材含有ペレットの製造方法
JP5073707B2 (ja) * 2009-05-19 2012-11-14 文化シヤッター株式会社 開閉体の連結支持構造

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011118738A1 (fr) * 2010-03-25 2011-09-29 株式会社神戸製鋼所 Composition de briquette d'oxyde de fer contenant un matériau carboné, procédé de fabrication de cette dernière et procédé de fabrication du fer réduit à l'aide de cette dernière
CN102803523A (zh) * 2010-03-25 2012-11-28 株式会社神户制钢所 含碳氧化铁团块及其制造方法以及使用了它的还原铁制造方法
JP2020204078A (ja) * 2019-06-18 2020-12-24 日本製鉄株式会社 高炉用非焼成塊成鉱の製造方法
JP7252454B2 (ja) 2019-06-18 2023-04-05 日本製鉄株式会社 高炉用非焼成塊成鉱の製造方法
WO2022056560A1 (fr) * 2020-09-14 2022-03-17 Mintek Liant pour un procédé d'agglomération

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CN101755064A (zh) 2010-06-23
JP5474543B2 (ja) 2014-04-16
JPWO2009014255A1 (ja) 2010-10-07
CN101755064B (zh) 2011-12-28
KR101489537B1 (ko) 2015-02-03
BRPI0814206A2 (pt) 2015-01-27
KR20100043044A (ko) 2010-04-27
BRPI0814206B1 (pt) 2017-06-27

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