CN1171669C - Method for preparing photocatalysis material by using iron blast-furnace slag containing titanium - Google Patents
Method for preparing photocatalysis material by using iron blast-furnace slag containing titanium Download PDFInfo
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- CN1171669C CN1171669C CNB021097712A CN02109771A CN1171669C CN 1171669 C CN1171669 C CN 1171669C CN B021097712 A CNB021097712 A CN B021097712A CN 02109771 A CN02109771 A CN 02109771A CN 1171669 C CN1171669 C CN 1171669C
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Abstract
The present invention relates to a method for preparing materials containing titanium and having photocatalytic performance by blast-furnace slag, and belongs to a preparation method of ceramic materials. The method mainly uses blast-furnace slag containing titanium dioxide and having wide source, and adds a small quantity of transition group metal or rare earth compounds. Slurry materials are attached to the surfaces of ceramic, metal and glass organic matters and building materials to form membrane materials through the technique steps of crushing, sorting, presintering, proportioning, ball milling, cating, drying, calcinating and cooling raw materials. The membrane materials of the present invention have the properties of common membrane materials besides, and also have photocatalytic performance, and the membrane materials can be used for decomposing organic pollutants in water, purifying environmental air, and carrying out sterilization and deodorization. The present invention not only reduces the cost of the materials, but also utilizes a large quantity of industrial waste slag, and the combination properties of the materials are superior. The method can also be used for making block materials.
Description
Affiliated technical field
The invention belongs to a kind of preparation method of ceramic material, particularly a kind of method for preparing catalysis material with titanium-containing blast furnace slag.
Background technology
Use pure titinium dioxide to come out as the glass and the ceramic material of catalysis material, but will contain the titanium dioxide blast furnace slag as catalysis material do not appear in the newspapers at present to.Utilize pure titinium dioxide very high as the glass and the ceramic material cost of catalysis material, and the blast furnace slag that contains titanium dioxide is a kind of metallurgical discarded object, bulk deposition pollutes easily.
Summary of the invention
Use glass and the ceramic material cost height of pure titinium dioxide at having now, and contain the unavailable problem of blast furnace slag of titanium dioxide, the invention provides a kind of method for preparing catalysis material with titanium-containing blast furnace slag as catalysis material.Characteristics of the present invention are to use the huge blast furnace slag discarded object that contains titanium dioxide of current production rate as raw material, add a spot of magnesium-yttrium-transition metal or rare earth compound, by specific machinery and physics chemical action, can be carried on the surface of materials such as pottery, metal, glass and organic matter, form the photocatalysis membrana material.
The present invention is raw materials used to be: contain the blast furnace slag (content that wherein requires titanium dioxide is more than 15%) of titanium dioxide, waterglass for building, rare earth, tungsten oxide.
The method of concrete preparation is as follows: (1) raw material fragmentation; (2) sorting of raw material; (3) pre-burning; (4) batching; (5) ball milling; (6) load; (7) drying; (8) burn till; (9) cooling.
(1) raw material fragmentation: the slag of independent broken bulk obtains the granule of diameter 1 millimeter by the fragmentation of 2-3 level.
(2) sorting of raw material: sub-elect metallic iron in the titanium-containing blast furnace slag in advance with magnetic selection method.
(3) pre-burning: the titanium-containing blast furnace slag after the sorting is calcined in oxidizing atmosphere, be warmed up to 550～600 ℃, be incubated 2～3 hours.
(4) batching: according to the composition of prepared material to through pre-burning contain titanium blast furnace slag and other raw material accurate dosings, rare earth accounts for 2～6%, tungsten oxide 0.2～0.6%, waterglass 3～8%, surplus is the titanium-containing blast furnace slag through fragmentation, sorting, pre-burning.
(5) ball milling: the raw material after will preparing burden is put into ball mill and is ground, and the powder size that grinds mainly is distributed between 3～20 μ m.
(6) load: the slip behind the ball milling is coated on film forming on the carriers such as ceramic batch, can spray, also can dip coating, and thickness is at 0.1-0.5mm.
(7) drying: with the air dry or in air of the material of coating in the oven dry of 100～120 ℃ of temperature.
(8) burn till: burn till under oxidizing atmosphere and normal pressure, sintering temperature is incubated 1-2 hour at 800～1100 ℃.
(9) cooling: adopting cooling fast more than 850 ℃, cooling velocity is controlled at 150～250 ℃/h; Cooling velocity below 850 ℃ the time is at 50～100 ℃/h.
The raw material sources of the catalysis material of the present invention's preparation are extensive, be mainly the blast furnace slag that contains titanium dioxide, this is a kind of discarded object of metallurgical industry, as not utilizing not only contaminated environment, and be the huge waste of resource, the present invention utilizes this discarded object of blast furnace slag that contains titanium dioxide for disposable (integral body) and has sought a no new Litter, no new pollution, made waste residue rise in value, meet the rational and effective approach of ecological rule.
Product of the present invention has photocatalysis performance, not only can be used for sewage disposal, and can remove airborne pernicious gas, as sulfide, nitride etc.; Can also be applied to places such as health care, play the effect of deodorization and sterilization, be novel environment-friendly materials.This method also can be made block materials.
The specific embodiment
Example 1
Prepare a kind of photocatalysis architectural pottery goods according to process provided by the invention: the base substrate that uses once burning of common building pottery, the coating low temperature glaze, dry back spraying material of the present invention, thickness is 0.2mm.The proportioning of material is a blast furnace slag (wherein content of titanium dioxide 22.6%) 88.7%, waterglass 8%, rare earth 3%, tungsten oxide 0.3%.Through the calcining of super-dry and 800-1100 ℃, obtain outward appearance and common building pottery goods similar and that have photocatalysis performance.
Use goods of the present invention in sewage disposal, the area of goods spraying catalysis material is 20cm
2, experiment is estimated the photocatalysis effect of catalysis material with the resolution ratio of the dyestuff methylene blue in inertia dyestuff methylene blue dilute aqueous solution (200ml, concentration is 5mg/L), at irradiation intensity greater than 20mWcm
-2Under ultraviolet light (wavelength 254nm) irradiation, the resolution ratio of inertia dyestuff methylene blue can reach 50～60% after 4 hours.
Example 2
Prepare a kind of light catalyzed coating according to process provided by the invention: the proportioning of material is: blast furnace slag (wherein content of titanium dioxide 22.6%) 88.7%, waterglass 8%, rare earth 3%, tungsten oxide 0.3%.Material of the present invention is sprayed at not dried cement slurry surface, and thickness is 0.4mm, combines in the hydration and hardening process of cement, obtains the coating of outer appearnce like the cement mortar color.Make little test block with the method, the area of spraying catalysis material is 20cm
2, maintenance was tested after seven days in the running water.Test block is put in the inertia dyestuff methylene blue dilute aqueous solution (200ml, concentration is 5mg/L), estimates the photocatalysis effect of catalysis material with the resolution ratio of the dyestuff methylene blue in the solution, at irradiation intensity greater than 20mWcm
-2Under ultraviolet light (wavelength 254nm) irradiation, the resolution ratio of inertia dyestuff methylene blue can reach 40～50% after 4 hours.
Claims (2)
1, a kind ofly prepare the method for catalysis material with titanium-containing blast furnace slag, it is characterized in that raw materials usedly being: contain the blast furnace slag of titanium dioxide, content of titanium dioxide accounts for more than 15%, waterglass for building, rare earth, tungsten oxide; Its processing step:
1) raw material fragmentation: the slag of bulk is broken separately, obtains the granule of diameter 1 millimeter by the fragmentation of 2-3 level;
2) sorting of raw material: sub-elect metallic iron in the titanium-containing blast furnace slag in advance with magnetic selection method;
3) pre-burning: the titanium-containing blast furnace slag after the sorting is carried out pre-burning in oxidizing atmosphere, be warmed up to 550～600 ℃, be incubated 2～3 hours;
4) batching: contain titanium blast furnace slag and other raw materials through pre-burning carry out accurate dosing according to the composition of prepared material, and rare earth accounts for 2～6%, tungsten oxide 0.2～0.6%, and waterglass 3～8%, surplus is the titanium-containing blast furnace slag through fragmentation, sorting, pre-burning;
5) grinding: the raw material after the batching is put into high energy ball mill and is ground, and the powder size that grinds mainly is distributed between 3～20 μ m;
6) load: the slip behind the ball milling is coated on film forming on the ceramic batch carrier, and thickness is at 0.1-0.5mm;
7) drying: the air dry or in the oven dry of 100～120 ℃ of temperature in air of the material after will applying;
8) burn till: burn till under oxidizing atmosphere and normal pressure, sintering temperature is incubated 1-2 hour at 800～1100 ℃;
9) cooling:
A, adopting cooling fast more than 850 ℃, cooling velocity is controlled at 150～250 ℃/h;
B, the cooling velocity below 850 ℃ the time are at 50～100 ℃/h.
2, titanium-containing blast furnace slag according to claim 1 prepares the method for catalysis material, it is characterized in that said load can adopt two kinds of methods:
A, spraying,
B, dip coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021097712A CN1171669C (en) | 2002-05-31 | 2002-05-31 | Method for preparing photocatalysis material by using iron blast-furnace slag containing titanium |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB021097712A CN1171669C (en) | 2002-05-31 | 2002-05-31 | Method for preparing photocatalysis material by using iron blast-furnace slag containing titanium |
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| CN1446624A CN1446624A (en) | 2003-10-08 |
| CN1171669C true CN1171669C (en) | 2004-10-20 |
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| CNB021097712A Expired - Fee Related CN1171669C (en) | 2002-05-31 | 2002-05-31 | Method for preparing photocatalysis material by using iron blast-furnace slag containing titanium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100362113C (en) * | 2005-11-25 | 2008-01-16 | 东北大学 | Ecological treating method for blast furnace slag containing titanium |
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| CN100430127C (en) * | 2006-07-10 | 2008-11-05 | 东北大学 | Process for preparing photo-catalytic materials by using strong magnetic field modified titanium-rich slag |
| CN100537023C (en) * | 2007-11-08 | 2009-09-09 | 武汉科技大学 | Photocatalyst having response to visible light and preparation thereof |
| CN102069001B (en) * | 2010-12-20 | 2012-07-04 | 武汉钢铁(集团)公司 | Preparation process for preparing photocatalyst from blast furnace slag serving as raw material |
| CN102416296A (en) * | 2011-10-24 | 2012-04-18 | 沈阳建筑大学 | Method for treating formaldehyde by using activated carbon fiber loaded titanium-containing blast furnace slag |
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| CN108546437A (en) * | 2018-05-07 | 2018-09-18 | 中国科学院宁波材料技术与工程研究所 | A kind of antifouling paint, preparation method and application based on solid waste resource |
| CN108996814B (en) * | 2018-07-19 | 2021-05-18 | 江苏澳洋生态园林股份有限公司 | Urban sewage and rainwater combined treatment process |
| CN108947486A (en) * | 2018-08-28 | 2018-12-07 | 攀枝花市恒岩钛洁新材料科技有限公司 | The method for preparing photocatalysis porous brick using high-titanium blast furnace slag |
| CN109680178B (en) * | 2018-12-05 | 2020-12-01 | 盐城工学院 | Preparation method and application of tungsten-based nanoflower material |
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- 2002-05-31 CN CNB021097712A patent/CN1171669C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100362113C (en) * | 2005-11-25 | 2008-01-16 | 东北大学 | Ecological treating method for blast furnace slag containing titanium |
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