CN105347684A - Blast-furnace-slag glass ceramics and preparation method therefor - Google Patents
Blast-furnace-slag glass ceramics and preparation method therefor Download PDFInfo
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- CN105347684A CN105347684A CN201510837083.4A CN201510837083A CN105347684A CN 105347684 A CN105347684 A CN 105347684A CN 201510837083 A CN201510837083 A CN 201510837083A CN 105347684 A CN105347684 A CN 105347684A
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Abstract
The invention belongs to the technical field of waste-slag treatment of steel works and particularly relates to a preparation method for blast-furnace-slag glass ceramics and a product of the preparation method. The preparation method comprises the steps of melting a mixture, which is prepared through grinding and mixing the raw materials proportioned in percentage by mass: 67-84% of blast-furnace slag, 1-8% of SiO2, 3-5% of Na2CO3, 9-10% of MgF2, 0-5% of P2O5 and 1-5% of TiO2, for 2.5-3.5 hours at the temperature of 1,300-1,450 DEG C so as to prepare molten glass, pouring the molten glass into a copper mold, which is preheated at the temperature of 300 DEG C, for molding, carrying out annealing for 2 hours at the temperature of 600 DEG C, finally, carrying out devitrification for 2 hours at the temperature of 710-740 DEG C, carrying out crystallization for 2-3 hours at the temperature of 850-900 DEG C, and then, carrying out annealing and cooling. The preparation method disclosed by the invention is simple in process, low in melting temperature and easy in production process control, and the prepared glass ceramics are good in mechanical properties and obvious in wear-resisting and corrosion-resisting effects and show an excellent application prospect when the glass ceramics are applied to the industrial field.
Description
Technical field
The invention belongs to the technical field of steel mill's Solid state fermentation, particularly a kind of preparation method of blast furnace slag glass-ceramic and product.
Background technology
The refuse of discharging from blast furnace when blast furnace slag is manUfaCtUre of pig iron, when furnace temperature reaches 1400-1600 DEG C, furnace charge melting, the gangue in ore, the ash content in coke and solubility promoter and other impurity that can not enter in the pig iron form the slag floated over above molten iron for master with silicate and aluminate.In blast furnace slag, main component is CaO, SiO
2, Al
2o
3.Due to the chemical composition of blast furnace slag and glassy phase seemingly, conventional glass-ceramic composition is: 12-15%CaO, 57-65%SiO
2, 6-8%Al
2o
3, 6-9%MgO, composition adjustment can be carried out thus direct production goes out glass-ceramic to blast furnace slag, usually containing the even nano level crystal of 55 ~ 98% (volume) micron in its structure, there are very high wear resistance, high-strength light, well thermal characteristics and chemical corrosion resistance nature and good insulating property, be widely used in the aspects such as machinery, electronics and electrician, space flight, chemical anticorrosion, mine, road, building, medical science.Blast furnace slag glass-ceramic can substitute manganese steel, stainless steel and cast stone and be applied to a lot of industrial circle, and such as, steel can be replaced in mining industry to be used as the lining of guide groove, hopper chute, and work-ing life can improve 5 ~ 10 times; As the cone in coal separating plant's hydrocyclone, be equivalent to carbon steel or grey cast iron 10 ~ 12 times work-ing life, weight reduction 20% simultaneously.Not using as industrial waste blast furnace slag main raw material in the production technology of current glass-ceramic, the invention provides a kind ofly can to fully utilize industrial waste blast furnace slag, production method that production cost is low.
Summary of the invention
Object of the present invention, the invention provides a kind of blast furnace slag glass-ceramic and preparation method thereof, and the mechanical property of this glass-ceramic is good, wear resistant corrosion resistant successful, preparation melt temperature lower.
Object of the present invention can be achieved through the following technical solutions:
A preparation method for blast furnace slag glass-ceramic, its step comprises:
(1) by following mass percent proportioning raw material:
(2) described raw mill is mixed;
(3) compound after above-mentioned raw materials ground and mixed is become glass metal through 1300-1450 DEG C of melting 2.5-3.5h
(4) by the mould molding of described glass metal down to 300 DEG C of preheatings, 600 DEG C of annealing 2h;
(5) finally by 710-740 DEG C of crystallization 2h, 850-900 DEG C of crystallization 2-3h after annealing, cooling.
SiO
2reinforcing glass pottery stability, but its melt temperature is too high, is unfavorable for industrialization, and too high levels can reduce crystal production rate in glass-ceramic, therefore, will reach compromise, will add fusing assistant, Na on cost and performance
2cO
3a kind of well addition material, Na
2cO
3can ensure to improve Vitrea chemical stability when reducing melt temperature in the optional compositional ranges of glass-ceramic.MgF
2and P
2o
5synergy improve vitreum phase-splitting degree, at Nucleating Agent TiO
2effect under a large amount of and stablize crystallization.
During preparation glass-ceramic, under sufficiently high melt temperature, raw material could fully mix, and is conducive to the heat treatment process in later stage.The melt temperature of general preparation glass-ceramic is 1500-1600 DEG C, melt temperature is too high, reaction process is not easy to control, higher to the equipment requirements such as High Temperature Furnaces Heating Apparatus and refractory materials, and electric power resource consumption can become the increase of geometricprogression along with the rising of melt temperature, is unfavorable for the requirement of cost control and environmental protection.Na is added in the present invention
2cO
3, Na
2cO
3being a kind of well addition material, the melt temperature of glass-ceramic can being reduced to 1400 DEG C, reaction process is controlled well, the stability maintaining glass-ceramic when reducing melt temperature can also being ensured simultaneously.
In preferred described step (1), mass percent proportioning is slag 71-76%, SiO
25-8%, Na
2cO
34-5%, MgF
29-10%, P
2o
51-2%, TiO
23-5%.
TiO2 is Nucleating Agent, makes crystal grain tiny and increases physical strength and chemical stability, but TiO
2mix and significantly can raise vitreum melt temperature, therefore to control overall volume.
In described step (1), the mass percent of the chemical composition of blast furnace slag is SiO
231-38%, Al
2o
312-15%, Fe
2o
32-4%, CaO35-42%, SO
30.1-0.3%, MgO6-8%, MnO0.3-0.6%, TiO
20.3-0.5%.
Melting in described step (3) from room temperature, thus makes High Temperature Furnaces Heating Apparatus in rational temperature elevating range, ensure stable the changing to molten state of raw material with 10 DEG C/min.
Compound in described step (3), through 1400 DEG C of melting 3h, is of value to and ensures the sufficient melting of glass metal and clarification.
The temperature of the annealing in described step (5) is 500-600 DEG C, and the time is 1-2h, is of value to the elimination of female glass internal stress under softening temperature, prevents female glass to ftracture in follow-up heat treatment process.
The temperature of described annealing is 600 DEG C, and the time is 2h.Can better eliminate glass internal stress.
Cooling in described step (5), with the cooling of the speed of average 3 DEG C/min, is of value to the internal stress eliminated glass-ceramic and produce in crystallization process, prevents the too fast glass-ceramic that causes of cooling from ftractureing.
The blast furnace slag glass-ceramic obtained according to above-mentioned method.
The alternative manganese steel of blast furnace slag glass-ceramic of the present invention, stainless steel and cast stone are applied to a lot of wear resistant corrosion resistant industrial circle.
The invention has the beneficial effects as follows:
Preparation method's technique of the present invention is simple, and melt temperature is low, and production process easily controls, and the glass-ceramic mechanical property prepared is good, wear resistant corrosion resistant successful, during for industrial circle, demonstrates fabulous application prospect.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1
Adopt dried blast furnace slag 71%, SiO
28%, Na
2cO
35%, MgF
210%, P
2o
51%, TiO
25% is raw material, by the accurate raw materials weighing of proportioning.Raw material is after ball mill grinding mixes, pour crucible into, then crucible is inserted High Temperature Furnaces Heating Apparatus, be warming up to 1400 DEG C with the speed of 10 DEG C/min, insulation 3h, after by the copper-made mould of glass metal down to 300 DEG C of preheatings, then 600 DEG C of annealing 2h, 720 DEG C of crystallization 2h, 870 DEG C of crystallization 2h, 600 DEG C of annealing 1h, are finally cooled to room temperature with the speed of average 2 DEG C/min, obtain blast furnace slag glass-ceramic again.
Embodiment 2
Adopt dried blast furnace slag 73%, SiO
28%, Na
2cO
35%, MgF
210%, TiO
24% is raw material, by the accurate raw materials weighing of proportioning.Raw material is after ball mill grinding mixes, pour crucible into, then crucible is inserted High Temperature Furnaces Heating Apparatus, be warming up to 1400 DEG C with the speed of 10 DEG C/min, insulation 3h, after by the copper-made mould of glass metal down to 300 DEG C of preheatings, then 600 DEG C of annealing 2h, 730 DEG C of crystallization 2h, 880 DEG C of crystallization 2h, 600 DEG C of annealing 1h, are finally cooled to room temperature with the speed of average 2 DEG C/min, obtain blast furnace slag glass-ceramic again.
Embodiment 3
Adopt dried blast furnace slag 74%, SiO
27%, Na
2cO
34%, MgF
29%, P
2o
51%, TiO
25% is raw material, by the accurate raw materials weighing of proportioning.Raw material is after ball mill grinding mixes, pour crucible into, then crucible is inserted High Temperature Furnaces Heating Apparatus, be warming up to 1400 DEG C with the speed of 10 DEG C/min, insulation 3h, after by the copper-made mould of glass metal down to 300 DEG C of preheatings, then 600 DEG C of annealing 2h, 740 DEG C of crystallization 2h, 890 DEG C of crystallization 2h, 600 DEG C of annealing 1h, are finally cooled to room temperature with the speed of average 2 DEG C/min, obtain blast furnace slag glass-ceramic again.
Embodiment 4
Adopt dried blast furnace slag 76%, SiO
25%, Na
2cO
34%, MgF
29%, P
2o
51%, TiO
25% is raw material, by the accurate raw materials weighing of proportioning.Raw material is after ball mill grinding mixes, pour crucible into, then crucible is inserted High Temperature Furnaces Heating Apparatus, be warming up to 1400 DEG C with the speed of 10 DEG C/min, insulation 3h, after by the copper-made mould of glass metal down to 300 DEG C of preheatings, then 600 DEG C of annealing 2h, 710 DEG C of crystallization 2h, 860 DEG C of crystallization 2h, 600 DEG C of annealing 1h, are finally cooled to room temperature with the speed of average 2 DEG C/min, obtain blast furnace slag glass-ceramic again.
Test result:
1, blast furnace slag glass-ceramic obtained in above-mentioned four embodiments tested, concrete data are as shown in table 1 below
Table 1
| Bending strength (MPa) | Toughness (kJ/m 2) | |
| Embodiment 1 | 75.3 | 1.97 |
| Embodiment 2 | 76.7 | 1.97 |
| Embodiment 3 | 76.9 | 2.03 |
| Embodiment 4 | 75.1 | 1.96 |
The above is preferred embodiment of the present invention, but the present invention should not be confined to the content disclosed in this embodiment.The equivalence completed under not departing from spirit disclosed in this invention so every or amendment, all fall into the scope of protection of the invention.
Claims (9)
1. a preparation method for blast furnace slag glass-ceramic, its step comprises:
(1) by following mass percent proportioning raw material:
(2) described raw material mixed grinding is also crossed 100 order steel sieves;
(3) compound after above-mentioned raw materials mixed grinding is become glass metal through 1300-1450 DEG C of melting 2.5-3.5h;
(4) by the mould molding of described glass metal down to 300-350 DEG C of preheating, 500-600 DEG C of annealing 1-2h;
(5) finally by 710-740 DEG C of crystallization 2h, 850-900 DEG C of crystallization 2-3h after annealing, cooling.
2. blast furnace slag glass-ceramic according to claim 1, is characterized in that: in described step (1), mass percent proportioning is slag 71-76%, SiO
25-8%, Na
2cO
34-5%, MgF
29-10%, P
2o
51-2%, TiO
23-5%.
3. blast furnace slag glass-ceramic according to claim 1 and 2, is characterized in that: in described step (1), the mass percent of the chemical composition of blast furnace slag is SiO
231-38%, Al
2o
312-15%, Fe
2o
31-4%, CaO35-42%, SO
30.1-0.3%, MgO6-8%, MnO0.3-0.6%, TiO
20.3-0.5%.
4. the preparation method of blast furnace slag glass-ceramic according to claim 1, is characterized in that: the melting in described step (3) with 10 DEG C/min from room temperature.
5. the preparation method of blast furnace slag glass-ceramic according to claim 1, is characterized in that: the compound in described step (3) is through 1400 DEG C of melting 3h.
6. the preparation method of blast furnace slag glass-ceramic according to claim 1, is characterized in that: the temperature of the annealing in described step (5) is 500-600 DEG C, and the time is 1-2h.
7. the preparation method of blast furnace slag glass-ceramic according to claim 5, is characterized in that: the temperature of described annealing is 600 DEG C, and the time is 2h.
8. the preparation method of blast furnace slag glass-ceramic according to claim 1, is characterized in that: the cooling in described step (5) cools with the speed of average 3 DEG C/min.
9. the blast furnace slag glass-ceramic that method according to claim 1 is obtained.
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| CN105347684B CN105347684B (en) | 2018-07-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106738204A (en) * | 2016-12-19 | 2017-05-31 | 四川省川东铸石有限责任公司 | A kind of chuck glass-ceramic tubre apparatus for pouring and its pouring procedure |
| CN108383390A (en) * | 2018-04-11 | 2018-08-10 | 四川名微晶科技股份有限公司 | A method of preparing devitrified glass new material using blast furnace hot slag |
| CN114873919A (en) * | 2022-06-18 | 2022-08-09 | 江西理工大学 | TiO 2 Method for harmless and high-value utilization of reinforced stainless steel slag in large quantity |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1613806A (en) * | 2004-11-24 | 2005-05-11 | 沈阳建筑大学 | Microcrystallizing glass for construction and produced from metal flume and its production |
| CN103145338A (en) * | 2013-03-27 | 2013-06-12 | 内蒙古科技大学 | Preparation method of blast furnace slag microcrystalline glass containing fluorine, potassium, sodium and rare earth |
-
2015
- 2015-11-26 CN CN201510837083.4A patent/CN105347684B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1613806A (en) * | 2004-11-24 | 2005-05-11 | 沈阳建筑大学 | Microcrystallizing glass for construction and produced from metal flume and its production |
| CN103145338A (en) * | 2013-03-27 | 2013-06-12 | 内蒙古科技大学 | Preparation method of blast furnace slag microcrystalline glass containing fluorine, potassium, sodium and rare earth |
Non-Patent Citations (1)
| Title |
|---|
| 西北轻工业学院: "《玻璃工艺学》", 31 January 1982, 中国轻工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106738204A (en) * | 2016-12-19 | 2017-05-31 | 四川省川东铸石有限责任公司 | A kind of chuck glass-ceramic tubre apparatus for pouring and its pouring procedure |
| CN108383390A (en) * | 2018-04-11 | 2018-08-10 | 四川名微晶科技股份有限公司 | A method of preparing devitrified glass new material using blast furnace hot slag |
| CN114873919A (en) * | 2022-06-18 | 2022-08-09 | 江西理工大学 | TiO 2 Method for harmless and high-value utilization of reinforced stainless steel slag in large quantity |
| CN114873919B (en) * | 2022-06-18 | 2023-11-28 | 江西理工大学 | TiO 2 Method for strengthening mass harmless and high-value utilization of stainless steel slag |
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|---|---|
| CN105347684B (en) | 2018-07-27 |
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Address after: 524000 rooms 107, 108, 109, 110 and 111, building 12, east area, Baosteel Zhanjiang iron and Steel Co., Ltd., Dongjian Town, Zhanjiang Economic and Technological Development Zone, Zhanjiang City, Guangdong Province Patentee after: Baowu huanke (Zhanjiang) Resources Recycling Co.,Ltd. Address before: 524072 rooms 107, 108, 109, 110 and 111, building 12, east area of Baosteel Zhanjiang iron and Steel Co., Ltd., Dongjian Town, Zhanjiang Economic and Technological Development Zone, Zhanjiang City, Guangdong Province Patentee before: ZHANJIANG BAOSTEEL NEW BUILDING MATERIALS TECHNOLOGY CO.,LTD. |
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