CN103922699A - Method of preparing domestic ceramic by coal ash - Google Patents
Method of preparing domestic ceramic by coal ash Download PDFInfo
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- CN103922699A CN103922699A CN201410114554.4A CN201410114554A CN103922699A CN 103922699 A CN103922699 A CN 103922699A CN 201410114554 A CN201410114554 A CN 201410114554A CN 103922699 A CN103922699 A CN 103922699A
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- ceramic
- feldspar
- flyash
- coal ash
- clay
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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Abstract
The invention relates to a method of preparing a domestic ceramic by coal ash. The method comprises the following steps: by mainly taking a solid waste coal ash, clay and feldspar as raw materials, preparing a ceramic blank; carrying out surface treatment on the ceramic blank; and finally, sintering at a high temperature to obtain the domestic ceramic with excellent performance. The domestic ceramic is produced by taking the industrial solid waste coal ash, clay and feldspar as the raw materials, and the doping amount of the coal ash can reach up to 60%, so that the production cost of the ceramic is lowered, thereby solving the condition that the coal ash is insufficient to use and pollutes the environment and protecting the ecological environment. The produced domestic ceramic has the advantages of smooth surface, durability and the like, and can be widely applied to the ceramic manufacturing field and the field of comprehensive utilization of the industrial solid wastes.
Description
Technical field
The invention belongs to industrial solid castoff comprehensive utilization field, relate to the novel method of comprehensive utilization industrial solid castoff flyash.
Background technology
Modern coal-fired boiler in thermal power plant all be take levigate coal dust as fuel. in coal dust sprays into stove; just with the form of fine particle or group, burn. due to the high about 1200-1600 ℃ of temperature in stove; coal ash is subject to high temperature action to be molten state. most of combustiblematerials after-flame in stove in coal; unburned carbon and inorganic mineral components majority rise with high temperature gas flow; under induced draft fan air-extraction function; along flue temperature decrease when superheater, economizer flow to air preheater; melting ash, because condensing its internal gas that makes is compressed, becomes hollow spheres ash; And under capillary effect, make most of soot particle surface be smooth spherical, also some soot particle collision mutually under molten state, produce surface irregularity, the more honeycomb particulate of corner angle. before induced draft fan enters atmosphere by flue gas, above-mentioned particle is separated through fly-ash separator, collection, is flyash or flying dust.Lime-ash after coal dust firing generally accounts for the 15-40% of raw coal quality.Lime-ash has two kinds of forms: the one, and flying dust, accounts for the 70-85% of lime-ash total amount; Another is the granular lime-ash combining at burner hearth, enters boiler bottom, and what have forms bulk, after fragmentation, from furnace bottom, collects out, is called furnace bottom ash, accounts for the 15-30% of lime-ash total amount.
The comprehensive reutilization rate that generally believes now Coal Ash in China can reach more than 60%, but show according to the report of survey to Coal Ash in China in 2010, practical situation may connect this target half less than, the current total utilization of PCA rate of China only has 30% left and right, that is to say and has at least every year the flyash of 2.63 hundred million tons to dispose storage at Hui Chang.So the flyash that utilizes how can be efficiently a large amount of remains a difficult task.
Over nearly 20 years, ceramic industry has entered developmental stage with rapid changepl. never-ending changes and improvements, a large amount of uses of new technology, new installation, and ceramic yield also increases by a fairly big margin.At present, due to a large amount of exploitations, china clay resource reduces just with surprising rapidity, and the flying apsaras Yan Citukuang that the most ceramic producers in Chaozhou rely on of take is example, between the short more than ten years, from original " high mountain ", becomes " hillock ".Someone predicts, with such recovery rate at present, after 10 years, the difficult situation without china clay exploitation may appear in town of porcelain.
So, contaminate environment insufficient for utilization of fly ash, and the present situation such as ceramic clay resource scarcity, how increasing the added value of flyash, in the new purposes of developing industrial solid castoff flyash, alleviating ceramic clay resource raw material present situation in short supply is when last difficult task.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is exactly how to increase the added value of flyash, in the new purposes of developing industrial solid castoff flyash, alleviate ceramic clay resource raw material present situation in short supply.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of coal ash for manufacturing that utilizes for the method for domestic ceramics, said method comprising the steps of:
Step 1: by flyash, clay, feldspar batch mixing, the material being uniformly mixed;
Step 2: the material that step 1 is obtained by ball milling, deironing sieve, old, after secondary pugging, be cut into cake mass;
Step 3: cake mass, by gypsum mold moulding, obtains ceramic body;
Step 4: ceramic body is dried, then ceramic body is carried out to surface treatment;
Step 5: carry out high temperature sintering after ceramic body is dried, make ceramic product.
Preferably, the add-on scope of flyash is 10%-60% during batch mixing.
Preferably, described method for mixing is material by wet type mixing, comprises the following steps:
First, by flyash, clay, feldspar fragmentation, put in tank together with agate ball;
Secondly, add a certain amount of water in tank, then high speed rotating, reaches the even mixing of flyash, clay, feldspar by the motion of agate ball;
Finally, take out agate ball, the material being uniformly mixed.
Preferably, in described material by wet type mixing, material: agate ball: the weight ratio=1:2:0.5 of water.
Preferably, the surface treatment of ceramic body being carried out comprises successively: spraying transition layer, spraying glaze.
Preferably, billet surface is sprayed to two-layer glaze, obtain surperficial multilayered structure.
Preferably, described glaze is opaque glaze, composition is feldspar, Wingdale, zircon, kaolin, quartz, zinc oxide, barium carbonate, and wherein each composition quality per-cent is preferred: feldspar 22.5%, Wingdale 20%, zircon 15%, kaolin 12.5%, quartz 24%, zinc oxide 3%, barium carbonate 3%.
Preferably, described sintering temperature is 1100-1500 ℃, and sintering time is 1-6h.
(3) beneficial effect
The present invention proposes a kind of a kind of method that solid waste coal ash is processed, according to the general characteristic of flyash, adopt simple technological process, the ingenious characteristic of utilizing this solid waste of flyash, utilizes it as aggregate, to prepare high-performance domestic ceramics.The main component of flyash is silicon-dioxide and aluminium sesquioxide, and the present invention utilizes flyash to add other raw materials to prepare pottery, and wherein the incorporation of flyash can be up to 60%.In this way, not only can make full use of solid waste coal ash, and increase substantially the added value of product utilization, the domestic ceramics any surface finish of producing is durable in use.Realized the recycling of solid waste, reduced the place resource taking because of landfill and the environmental pollution therefore causing, alleviated ceramic clay resource raw material present situation in short supply, the excellent property of domestic ceramics, has good practicality simultaneously.The present invention meets the situation of national existing solid waste, is conducive to promote in practice.There is important economy, society and ecological, environmental protective meaning.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1: a kind of coal ash for manufacturing that utilizes of the present invention is for the technological line schematic diagram of the method for domestic ceramics;
Fig. 2: the high-performance domestic ceramic product that utilizes the inventive method manufacture to obtain;
Embodiment
Below in conjunction with drawings and Examples, embodiments of the present invention are described in further detail.Following examples are used for illustrating the present invention, but can not be used for limiting the scope of the invention.
Embodiment 1: by 60 parts, flyash, 30 parts of clays, 10 parts of feldspars are prepared burden, according to material: ball: the weight ratio=1:2:0.5 of water carries out batch mixing, time is 24h, the old time is 1 day, after secondary pugging, be cut into cake mass, adopt gypsum mold moulding, through 4h, take out to obtain base substrate, dry, at its top layer spraying one deck transition layer, (opaque glaze composition is feldspar 22.5% to spray the ultra-fine opaque glaze of one deck again, Wingdale 20%, zircon 15%, kaolin 12.5%, quartzy 24%, zinc oxide 3%, barium carbonate 3%), again dry, high temperature sintering, temperature is 1400 ℃, time is 2h.Cooling down obtains ceramic product.
Embodiment 2: by 40 parts, flyash, 40 parts of clays, 20 parts of feldspars are prepared burden, according to material: ball: the weight ratio=1:2:0.5 of water carries out batch mixing, time is 24h, the old time is 1 day, after secondary pugging, be cut into cake mass, adopt gypsum mold moulding, through 4h, take out to obtain base substrate, dry, at its top layer spraying one deck transition layer, (opaque glaze composition is feldspar 22.5% to spray the ultra-fine opaque glaze of one deck again, Wingdale 20%, zircon 15%, kaolin 12.5%, quartzy 24%, zinc oxide 3%, barium carbonate 3%), again dry, high temperature sintering, temperature is 1300 ℃, time is 4h.Cooling down obtains ceramic product.
Embodiment 3: by 20 parts, flyash, 50 parts of clays, 30 parts of feldspars are prepared burden, according to material: ball: the weight ratio=1:2:0.5 of water carries out batch mixing, time is 24h, the old time is 1 day, after secondary pugging, be cut into cake mass, adopt gypsum mold moulding, through 4h, take out to obtain base substrate, dry, at its top layer spraying one deck transition layer, (opaque glaze composition is feldspar 22.5% to spray the ultra-fine opaque glaze of one deck again, Wingdale 20%, zircon 15%, kaolin 12.5%, quartzy 24%, zinc oxide 3%, barium carbonate 3%), again dry, high temperature sintering, temperature is 1100 ℃, time is 6h.Cooling down obtains ceramic product.
In embodiment 1, embodiment 2, embodiment 3, the content of flyash reduces successively, and the color of corresponding ceramic body is thin out gradually, but spray sintering ceramic product out after glaze, is all the same color.
As the ceramic product of Fig. 2 for adopting the inventive method to obtain.
Above embodiment is only for the present invention is described, but not limitation of the present invention.Although the present invention is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is carried out to various combinations, revises or is equal to replacement, do not depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of claim scope of the present invention.
Claims (9)
1. utilize coal ash for manufacturing for a method for domestic ceramics, it is characterized in that, comprise the following steps:
Step 1: by flyash, clay, feldspar batch mixing, the material being uniformly mixed;
Step 2: the material that step 1 is obtained by ball milling, deironing sieve, old, after secondary pugging, be cut into cake mass;
Step 3: cake mass, by gypsum mold moulding, obtains ceramic body;
Step 4: ceramic body is dried, then ceramic body is carried out to surface treatment;
Step 5: carry out high temperature sintering after ceramic body is dried, make ceramic product.
2. method according to claim 1, is characterized in that, during batch mixing, the add-on scope of flyash is 10%-60%.
3. method according to claim 1, is characterized in that, described method for mixing is material by wet type mixing, comprises the following steps:
Step 1: by flyash, clay, feldspar fragmentation, put in tank together with agate ball;
Step 2: add a certain amount of water in tank, then high speed rotating, reaches the even mixing of flyash, clay, feldspar by the motion of agate ball;
Step 3: take out agate ball, the material being uniformly mixed.
4. method according to claim 3, is characterized in that, in described material by wet type mixing, and material: agate ball: the weight ratio=1:2:0.5 of water.
5. method according to claim 1, is characterized in that, the surface treatment that ceramic body is carried out comprises successively: spraying transition layer, spraying glaze.
6. method according to claim 5, is characterized in that, billet surface is sprayed to two-layer glaze, obtains surperficial multilayered structure.
7. method according to claim 5, is characterized in that, described glaze is opaque glaze, and composition is feldspar, Wingdale, zircon, kaolin, quartz, zinc oxide, barium carbonate.
8. method according to claim 7, is characterized in that, described composition quality per-cent is: feldspar 22.5%, Wingdale 20%, zircon 15%, kaolin 12.5%, quartz 24%, zinc oxide 3%, barium carbonate 3%.
9. method according to claim 1, is characterized in that, described sintering temperature is 1100-1500 ℃, and sintering time is 1-6h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410114554.4A CN103922699B (en) | 2014-03-25 | 2014-03-25 | A kind of coal ash for manufacturing that utilizes is for the method for domestic ceramics |
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| CN201410114554.4A CN103922699B (en) | 2014-03-25 | 2014-03-25 | A kind of coal ash for manufacturing that utilizes is for the method for domestic ceramics |
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| CN103922699A true CN103922699A (en) | 2014-07-16 |
| CN103922699B CN103922699B (en) | 2015-09-16 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105272158A (en) * | 2015-10-08 | 2016-01-27 | 北京大学 | Composite heat-insulation board and preparation method thereof |
| CN105769551A (en) * | 2016-05-13 | 2016-07-20 | 汪子朝 | Acupuncture and moxibustion health-preserving tank |
| CN105859252A (en) * | 2016-04-05 | 2016-08-17 | 安徽省含山民生瓷业有限责任公司 | Domestic ceramic tea set processing sludge |
| CN106673607A (en) * | 2016-12-08 | 2017-05-17 | 福建省德化荣鑫工艺品有限公司 | Light ceramic prepared by using waste ceramic gypsum mold and process |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103172348A (en) * | 2013-03-22 | 2013-06-26 | 朔州市朔湘陶瓷有限公司 | Coal ash flower pot |
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2014
- 2014-03-25 CN CN201410114554.4A patent/CN103922699B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103172348A (en) * | 2013-03-22 | 2013-06-26 | 朔州市朔湘陶瓷有限公司 | Coal ash flower pot |
Non-Patent Citations (3)
| Title |
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| 唐山建筑陶瓷厂《卫生陶瓷生产技术丛书》编写组: "《釉料》", 30 April 1981, article "釉料", pages: 77-79 * |
| 石棋 等: "《建筑陶瓷工艺学》", 31 August 2007, article "建筑陶瓷工艺学", pages: 155-158 * |
| 轻工业部第一轻工业局: "《日用陶瓷工业手册》", 31 December 1984, article "日用陶瓷工业手册" * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105272158A (en) * | 2015-10-08 | 2016-01-27 | 北京大学 | Composite heat-insulation board and preparation method thereof |
| CN105272158B (en) * | 2015-10-08 | 2017-05-24 | 北京大学 | Composite heat-insulation board and preparation method thereof |
| CN105859252A (en) * | 2016-04-05 | 2016-08-17 | 安徽省含山民生瓷业有限责任公司 | Domestic ceramic tea set processing sludge |
| CN105769551A (en) * | 2016-05-13 | 2016-07-20 | 汪子朝 | Acupuncture and moxibustion health-preserving tank |
| CN106673607A (en) * | 2016-12-08 | 2017-05-17 | 福建省德化荣鑫工艺品有限公司 | Light ceramic prepared by using waste ceramic gypsum mold and process |
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| CN103922699B (en) | 2015-09-16 |
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