CN105481407A - Calcium oxide material and preparation method thereof - Google Patents
Calcium oxide material and preparation method thereof Download PDFInfo
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- CN105481407A CN105481407A CN201610002626.5A CN201610002626A CN105481407A CN 105481407 A CN105481407 A CN 105481407A CN 201610002626 A CN201610002626 A CN 201610002626A CN 105481407 A CN105481407 A CN 105481407A
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- preparation
- fine powder
- calcium oxide
- calcia
- hydroxide fine
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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
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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
- 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
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
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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
- 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
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
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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
- 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
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5212—Organic
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- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention relates to a calcium oxide material and a preparation method thereof. According to the technical scheme, the calcium oxide material is obtained by using, by weight, 90-99.9% of calcium hydroxide fine powder and 0.1-10% of zirconium hydroxide fine powder as the raw materials, adding polypropylene fiber accounting for 0.1-0.7% of the weight of the raw materials, conducting stirring for 2-30 minutes, conducting pressing forming, drying a formed blank for 8-24 hours at the temperature of 110 DEG C, conducting heat preservation for 1-8 hours at the temperature of 1400-1800 DEG C, and conducting natural cooling. The preparation process is simple, and the prepared calcium oxide material is good in chemical stability, hydration resistance and thermal shock resistance, is excellent in melt erosion prevention performance and permeation prevention performance, can adsorb impurities in melt and is suitable for refractory materials used for high-purity metal or alloy smelting.
Description
Technical field
The invention belongs to calcia material technical field.Particularly relate to a kind of calcia material and preparation method thereof.
Background technology
When smelting super clean metal and alloy, people often wish containing free calcium oxide in smelting refractory materials, and with in the process of melt contacts, free calcium oxide has the ability that sulphur, phosphorus and absorbing oxide are mingled with.In known refractory oxide, the high-temperature stability of calcium oxide is best, and it is also little to the oxygenation in melt.So calcium oxide is optimal smelting cylinder-packing refractory raw material.
But free calcium oxide is easy to aquation in an atmosphere, is difficult to deposit, therefore, directly does raw material for refractory with calcium oxide and can face very large difficulty.To make steel working lining, way conventional is at present preparing direct introducing a part of Wingdale, i.e. CaCO in refractory materials process
3, allow Wingdale decompose at baking and use procedure situ and to form CaO and pore.Adopt this technology, material can be made before baking completely not containing free CaO, thoroughly avoid because of the aquation problem caused by the existence of free CaO.Meanwhile, can also ensure that liner in dundish has certain void content and turn over the needs of bag after meeting molten steel insulation and casting, and the CaO that Wingdale pyrolytic decomposition obtains has very high activity, be conducive to being mingled with in de-S, de-P and absorption steel.And the cylinder-packing refractory materials adopting this technology to prepare at high temperature forms vesicular structure, thus in casting process, reduce the temperature drop of molten steel in tundish, there is obvious insulation effect.But adopt refractory materials prepared by this technology, the content of calcium oxide is generally below 50%, and magnesian content exceedes half, because too high Wingdale add-on at high temperature sharply declines causing the intensity of material to, smelting needs cannot be met.But the deficiency of calcium oxide content is restricted causing the effect of its purify hot metal and alloy molten solution in material.Meanwhile, directly adopt Wingdale to be raw material in raw material, the carbon content of melt in smelting process can be caused to increase.
About the preparation of calcia material also studies have reported that, take calcium oxide as main raw material, add the materials such as compound rare-earth, titanium oxide, ferric oxide, aluminum oxide and silicon oxide as water resistant agent and agglutinant, additional bonding agent, at high temperature sinters after shaping.This technology is adopted to prepare calcia material, technique is comparatively complicated, also can reduce stability when material contacts with metal melt or aluminium alloy simultaneously, such as: add the increase that ferric oxide and silicon oxide will cause total oxygen content in melt, because ferric oxide and silicon oxide with can to melt oxygen supply during high-temperature fusant contact process.
Summary of the invention
The present invention is intended to overcome prior art deficiency, object is to provide the preparation method of the simple calcia material of a kind of technique, the calcia material prepared by the method is chemical stability, hydration resistance and good thermal shock stability not only, and anti-melt attack and penetrating quality excellent, the inclusion in melt can also be adsorbed; Be applicable to high pure metal or alloy smelting refractory materials.
For achieving the above object, the technical solution adopted in the present invention is: with the zirconium hydroxide fine powder of the calcium hydroxide fine powder of 90 ~ 99.9wt% and 0.1 ~ 10wt% for raw material, the polypropylene fibre of additional described raw material 0.1 ~ 0.7wt%, stirs 2 ~ 30 minutes, compression moulding; Base substrate after shaping under 110 DEG C of conditions dry 8 ~ 24 hours, then under 1400 ~ 1800 DEG C of conditions, be incubated 1 ~ 8 hour, naturally cooling, obtains calcia material.
The Ca (OH) of described calcium hydroxide fine powder
2content>=97wt%; Particle diameter is 1 ~ 500 μm.
The Zr (OH) of described zirconium hydroxide fine powder
4content>=95wt%; Particle diameter is 1 ~ 500 μm.
The length of described polypropylene fibre is 2 ~ 22mm, diameter 2 ~ 80 μm.Owing to adopting technique scheme, the present invention compared with prior art has following positively effect:
The present invention directly adopts calcium hydroxide to be raw material, decomposing and is transformed into calcium oxide, avoiding the problem causing metal melt carburetting because adopting Wingdale in high temperature preparation process; Secondly, in high-temperature heat treatment process, zirconium hydroxide decomposes the zirconium white generated can promote that the calcium oxide that calcium hydroxide generates sinters, and simultaneous oxidation zirconium can improve the toughness of material.Again, based on calcium oxide component in prepared material, the purity of metal smelting or alloy farthest can be improved.
Calcia material prepared by the present invention is after testing: CaO content>=85wt%; Volume density>=2.80g/cm
3; Compressive strength>=20MPa.
Therefore, preparation technology of the present invention is simple, and prepared calcia material is chemical stability, hydration resistance and good thermal shock stability not only, and anti-melt attack and penetrating quality excellent, the inclusion in melt can also be adsorbed, be applicable to the refractory materials of high pure metal or alloy smelting.
Embodiment
Below in conjunction with embodiment, the present invention will be further described, the restriction not to its protection domain.
For avoiding repetition, existing by as follows for the technical parameter Unify legislation involved by this embodiment, repeat no more in embodiment:
The Ca (OH) of described calcium hydroxide fine powder
2content>=97wt%; Particle diameter is 1 ~ 500 μm.
The Zr (OH) of described zirconium hydroxide fine powder
4content>=95wt%; Particle diameter is 1 ~ 500 μm.
The length of described polypropylene fibre is 2 ~ 22mm, diameter 2 ~ 80 μm.
embodiment 1
A kind of calcia material and preparation method thereof.The present embodiment is with the zirconium hydroxide fine powder of the calcium hydroxide fine powder of 90 ~ 93wt% and 7 ~ 10wt% for raw material, and the polypropylene fibre of additional described raw material 0.1 ~ 0.3wt%, stirs 2 ~ 15 minutes, compression moulding; Base substrate after shaping under 110 DEG C of conditions dry 8 ~ 13 hours, then under 1400 ~ 1600 DEG C of conditions, be incubated 6 ~ 8 hours, naturally cooling, obtains calcia material.
Calcia material prepared by the present embodiment is after testing: CaO content>=85wt%; Volume density>=3.00g/cm
3; Compressive strength>=25MPa.
embodiment 2
A kind of calcia material and preparation method thereof.The present embodiment is with the zirconium hydroxide fine powder of the calcium hydroxide fine powder of 93 ~ 97wt% and 3 ~ 7wt% for raw material, and the polypropylene fibre of additional described raw material 0.3 ~ 0.5wt%, stirs 10 ~ 20 minutes, compression moulding; Base substrate after shaping under 110 DEG C of conditions dry 13 ~ 18 hours, then under 1600 ~ 1700 DEG C of conditions, be incubated 3 ~ 6 hours, naturally cooling, obtains calcia material.
Calcia material prepared by the present embodiment is after testing: CaO content>=90wt%; Volume density>=2.90g/cm
3; Compressive strength>=22MPa.
embodiment 3
A kind of calcia material and preparation method thereof.The present embodiment is with the zirconium hydroxide fine powder of the calcium hydroxide fine powder of 97 ~ 99.9wt% and 0.1 ~ 3wt% for raw material, and the polypropylene fibre of additional described raw material 0.5 ~ 0.7wt%, stirs 20 ~ 30 minutes, compression moulding; Base substrate after shaping under 110 DEG C of conditions dry 18 ~ 24 hours, then under 1700 ~ 1800 DEG C of conditions, be incubated 1 ~ 3 hour, naturally cooling, obtains calcia material
Calcia material prepared by the present embodiment is after testing: CaO content>=92wt%; Volume density>=2.80g/cm
3; Compressive strength>=20MPa.
This embodiment compared with prior art has following positively effect:
This embodiment directly adopts calcium hydroxide to be raw material, decomposing and is transformed into calcium oxide, avoiding the problem causing metal melt carburetting because adopting Wingdale in high temperature preparation process; Secondly, in high-temperature heat treatment process, zirconium hydroxide decomposes the zirconium white generated can promote that the calcium oxide that calcium hydroxide generates sinters, and simultaneous oxidation zirconium can improve the toughness of material.Again, based on calcium oxide component in prepared material, the purity of metal smelting or alloy farthest can be improved.
Calcia material prepared by this embodiment is after testing: CaO content>=85wt%; Volume density>=2.80g/cm
3; Compressive strength>=20MPa.
Therefore, the preparation technology of this embodiment is simple, and prepared calcia material is chemical stability, hydration resistance and good thermal shock stability not only, and anti-melt attack and penetrating quality excellent, the inclusion in melt can also be adsorbed, be applicable to the refractory materials of high pure metal or alloy smelting.
Claims (5)
1. a preparation method for calcia material, its technical scheme is: with the zirconium hydroxide fine powder of the calcium hydroxide fine powder of 90 ~ 99.9wt% and 0.1 ~ 10wt% for raw material, the polypropylene fibre of additional described raw material 0.1 ~ 0.7wt%, stirs 2 ~ 30 minutes, compression moulding; Base substrate after shaping under 110 DEG C of conditions dry 8 ~ 24 hours, then under 1400 ~ 1800 DEG C of conditions, be incubated 1 ~ 8 hour, naturally cooling, obtains calcia material.
2. the preparation method of calcia material according to claim 1, is characterized in that the Ca (OH) of described calcium hydroxide fine powder
2content>=97wt%; Particle diameter is 1 ~ 500 μm.
3. the preparation method of calcia material according to claim 1, is characterized in that the Zr (OH) of described zirconium hydroxide fine powder
4content>=95wt%; Particle diameter is 1 ~ 500 μm.
4. the preparation method of calcia material according to claim 1, is characterized in that the length of described polypropylene fibre is 3 ~ 22mm, diameter 2 ~ 80 μm.
5. a calcia material, is characterized in that described calcia material is the calcia material prepared by preparation method of the calcia material according to any one of claim 1 ~ 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610002626.5A CN105481407A (en) | 2016-01-06 | 2016-01-06 | Calcium oxide material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610002626.5A CN105481407A (en) | 2016-01-06 | 2016-01-06 | Calcium oxide material and preparation method thereof |
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| CN105481407A true CN105481407A (en) | 2016-04-13 |
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| CN201610002626.5A Pending CN105481407A (en) | 2016-01-06 | 2016-01-06 | Calcium oxide material and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106631074A (en) * | 2017-01-05 | 2017-05-10 | 武汉科技大学 | High-calcium-oxide-content calcium oxide material and preparation method thereof |
| CN106631121A (en) * | 2017-01-05 | 2017-05-10 | 武汉科技大学 | Calcium oxide foam ceramic and preparation method thereof |
| CN107056255A (en) * | 2017-01-18 | 2017-08-18 | 武汉科技大学 | A kind of calcium oxide filter and preparation method thereof |
| CN108383533A (en) * | 2018-03-01 | 2018-08-10 | 武汉科技大学 | A kind of hydration resistant calcia material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB919108A (en) * | 1958-06-03 | 1963-02-20 | Wacker Chemie Gmbh | Process for the manufacture of calcium oxide of low reactivity |
| CN1803703A (en) * | 2006-01-20 | 2006-07-19 | 东北大学 | Method for preparing compact calcium oxide sand |
| CN102285806B (en) * | 2011-06-03 | 2013-04-17 | 武汉科技大学 | Synthetic calcium magnesite and preparation method thereof |
| CN102225780B (en) * | 2011-04-19 | 2013-08-28 | 上海彭浦冶金辅料有限公司 | High-activity calcium oxide and production method thereof |
-
2016
- 2016-01-06 CN CN201610002626.5A patent/CN105481407A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB919108A (en) * | 1958-06-03 | 1963-02-20 | Wacker Chemie Gmbh | Process for the manufacture of calcium oxide of low reactivity |
| CN1803703A (en) * | 2006-01-20 | 2006-07-19 | 东北大学 | Method for preparing compact calcium oxide sand |
| CN102225780B (en) * | 2011-04-19 | 2013-08-28 | 上海彭浦冶金辅料有限公司 | High-activity calcium oxide and production method thereof |
| CN102285806B (en) * | 2011-06-03 | 2013-04-17 | 武汉科技大学 | Synthetic calcium magnesite and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 刘银等: "《无机非金属材料工艺学》", 30 September 2015, 中国科学技术大学出版社 * |
| 古瑞琴: "氧化钙基耐火材料的结构与性能", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 赵瑞: "烧结CaO的粒度对氧化钙质耐火材料抗水化性的影响", 《REFRACTORIES & LIME》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106631074A (en) * | 2017-01-05 | 2017-05-10 | 武汉科技大学 | High-calcium-oxide-content calcium oxide material and preparation method thereof |
| CN106631121A (en) * | 2017-01-05 | 2017-05-10 | 武汉科技大学 | Calcium oxide foam ceramic and preparation method thereof |
| CN107056255A (en) * | 2017-01-18 | 2017-08-18 | 武汉科技大学 | A kind of calcium oxide filter and preparation method thereof |
| CN108383533A (en) * | 2018-03-01 | 2018-08-10 | 武汉科技大学 | A kind of hydration resistant calcia material and preparation method thereof |
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