CN105541354A - A CaO refractory material used for a hydration-resisting crucible and a preparing method of the crucible - Google Patents

A CaO refractory material used for a hydration-resisting crucible and a preparing method of the crucible Download PDF

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Publication number
CN105541354A
CN105541354A CN201510977062.2A CN201510977062A CN105541354A CN 105541354 A CN105541354 A CN 105541354A CN 201510977062 A CN201510977062 A CN 201510977062A CN 105541354 A CN105541354 A CN 105541354A
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crucible
cao
hydration
hours
refractory materials
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Inventor
李重河
鲁雄刚
孟繁龙
陈光耀
林崇茂
汪宏斌
秦子威
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University of Shanghai for Science and Technology
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University of Shanghai for Science and Technology
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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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
    • C04B35/057—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on calcium oxide
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3225—Yttrium oxide or oxide-forming salts thereof
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6567—Treatment time
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
    • C04B2235/661—Multi-step sintering
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/77—Density

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)

Abstract

The invention relates to a CaO refractory material used for a hydration-resisting crucible and a preparing method of the crucible. The material comprises 92-99 mol% of calcium oxide and 1-8 mol% of yttrium oxide. Under the premise of not destroying properties of the CaO, the YaO3 which is an additive is introduced to improve hydration resistance and sintering properties of the CaO refractory material so as to obtain the better crucible refractory material for titanium alloy melting. Hydration tests (in atmosphere, at 25-30 DEG C, with humidity being 65-75%) prove that the 28-day weight gain of the crucible is less than 0.2%.

Description

The water resistant crucible preparation method of CaO refractory materials and crucible thereof
Technical field
The present invention relates to the preparation method of a kind of water resistant crucible CaO refractory materials and crucible thereof.
Technical background
Along with the high quality of molten steel, relevant refractory materials is had higher requirement, the particularly refractory materials requirement that can not pollute molten steel.CaO refractory materials does not only pollute molten steel and can catch the oxide inclusion in molten steel, has the effect of purify hot metal, and aboundresources, cheap; CaO refractory materials also has certain advantage in smelting titanium alloy in addition, but CaO very easily aquation in atmosphere, therefore its use is restricted.
Although the technology of the various CaO of preventing aquation constantly develops to some extent, aquation is still inevitable.Some surface preparations can improve the hydration resistance of CaO refractory materials to a certain extent, but do not solve the problem of the easy aquation of CaO material at all, and the film heat formed on surface is easily decomposed, the use properties of restriction goods.Another kind method introduces salt or oxide-based additive, coated CaO crystal grain, promotes grain growing, forms the hydration resistance combining and firmly organize and improve CaO refractory materials simultaneously.
Summary of the invention
An object of the present invention is to provide a kind of water resistant crucible CaO refractory materials.
Two of object of the present invention is the preparation method providing crucible.
A kind of water resistant crucible CaO refractory materials, is characterized in that the composition of this material and molar content are:
Calcium oxide 92 ~ 99mol%; Yttrium oxide 1 ~ 8mol%.
A kind of preparation method of crucible, above-mentioned water resistant crucible CaO refractory materials is adopted to be raw material, it is characterized in that the concrete steps of the method are: by the water-free organic solvent of above-mentioned water resistant crucible CaO refractory materials (such as: alcohol, ether), after ball milling 30 ~ 120 clock, compression moulding; Again by this shaping sample at 500 ~ 650 DEG C, sinter 1 ~ 6 hour, then be warming up to 1700 ~ 1780 DEG C through 9 ~ 14 hours, sinter 3 ~ 5 hours, then be cooled to room temperature through 9 ~ 14 hours, obtain finished product crucible.
Shown by XRD figure spectrum analysis and volume density test, its phase composite is CaO, CaY 2o 4deng.Aquation test (in an atmosphere, temperature is 25 ~ 30 DEG C, humidity is 65% ~ 75% to deposit) shows, crucible weightening finish in 28 days is less than 0.2%.
This research is exactly under the prerequisite not destroying CaO character, adopts and introduces additive Y 2o 3method improve hydration resistance and the sintering character of CaO refractory materials, obtain a kind of titanium alloy melting crucible refractory material preferably.
Embodiment
Embodiment one:
The calcium oxide refractory materials component of preventing hydration provided by the invention is as follows: (molar percentage)
Calcium oxide powder 99%, yttrium oxide powder 1%, all raw materials all adopt technical pure.
Weigh a certain amount of calcium oxide and yttrium oxide according to the above ratio, batch mixing is put into water-free organic solvent (such as: alcohol, ether), after ball milling 30 clock, compression moulding; Again by this shaping sample at 600 DEG C, sinter 6 hours, then be warming up to 1750 DEG C through 12 hours, sinter 3 hours, then be cooled to room temperature through 12 hours, obtain finished product crucible.
Gained preventing hydration calcium oxide fire-clay crucible: aquation rate (49 days) is 0.2%.
Embodiment two: the calcium oxide refractory materials component inventing the preventing hydration provided is as follows: (molar percentage)
Calcium oxide powder 94%, yttrium oxide powder 6%.All raw materials all adopt technical pure.
Weigh a certain amount of calcium oxide and yttrium oxide according to the above ratio, batch mixing is put into water-free organic solvent (such as: alcohol, ether), after ball milling 30 clock, compression moulding; Again by this shaping sample at 600 DEG C, sinter 6 hours, then be warming up to 1750 DEG C through 12 hours, sinter 3 hours, then be cooled to room temperature through 12 hours, obtain finished product crucible.
Gained preventing hydration calcium oxide refractory materials: its volume density is probably 3.34g/cm 3; Aquation rate (28 days) is 0.22%.
Embodiment three: the calcium oxide refractory materials component inventing the preventing hydration provided is as follows: (molar percentage)
Calcium oxide powder 92%, yttrium oxide powder 8%.All raw materials all adopt technical pure.
Weigh a certain amount of calcium oxide and yttrium oxide according to the above ratio, batch mixing is put into water-free organic solvent (such as: alcohol, ether), after ball milling 60 clock, compression moulding; Again by this shaping sample at 600 DEG C, sinter 8 hours, then be warming up to 1750 DEG C through 12 hours, sinter 5 hours, then be cooled to room temperature through 12 hours, obtain finished product crucible.
Gained preventing hydration calcium oxide refractory materials: its volume density is probably 3.34g/cm 3; Aquation rate (28 days) is 0.22%.

Claims (2)

1. a water resistant crucible CaO refractory materials, is characterized in that the composition of this material and molar content are:
Calcium oxide 92 ~ 99mol%; Yttrium oxide 1 ~ 8mol%.
2. the preparation method of a crucible, water resistant crucible CaO refractory materials according to claim 1 is adopted to be raw material, it is characterized in that the concrete steps of the method are: by the water-free organic solvent of above-mentioned water resistant crucible CaO refractory materials (such as: alcohol, ether), ball milling is after 30 ~ 120 minutes, compression moulding; Again by this shaping sample at 500 ~ 650 DEG C, sinter 1 ~ 6 hour, then be warming up to 1700 ~ 1780 DEG C through 9 ~ 14 hours, sinter 3 ~ 5 hours, then be cooled to room temperature through 9 ~ 14 hours, obtain finished product crucible.
CN201510977062.2A 2015-12-23 2015-12-23 A CaO refractory material used for a hydration-resisting crucible and a preparing method of the crucible Pending CN105541354A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107602139A (en) * 2017-10-24 2018-01-19 陕西海恩得工贸有限公司 A kind of material of melting titanium or titanium alloy crucible and the preparation method of crucible
CN114105614A (en) * 2021-12-03 2022-03-01 上海交通大学 Material for preparing fiber composite hydration-resistant calcium oxide crucible, crucible and preparation method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101462758A (en) * 2009-01-15 2009-06-24 东北大学 Method for preparing hydration resistant calcia material
CN101830715A (en) * 2010-05-06 2010-09-15 上海大学 Preparation method of CaO refractory and crucible for titanium alloy smelting

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101462758A (en) * 2009-01-15 2009-06-24 东北大学 Method for preparing hydration resistant calcia material
CN101830715A (en) * 2010-05-06 2010-09-15 上海大学 Preparation method of CaO refractory and crucible for titanium alloy smelting

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107602139A (en) * 2017-10-24 2018-01-19 陕西海恩得工贸有限公司 A kind of material of melting titanium or titanium alloy crucible and the preparation method of crucible
CN114105614A (en) * 2021-12-03 2022-03-01 上海交通大学 Material for preparing fiber composite hydration-resistant calcium oxide crucible, crucible and preparation method

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Application publication date: 20160504