CN102268235A - Infrared absorption material prepared by using coal gangue, and preparation method thereof - Google Patents
Infrared absorption material prepared by using coal gangue, and preparation method thereof Download PDFInfo
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- CN102268235A CN102268235A CN2010101970952A CN201010197095A CN102268235A CN 102268235 A CN102268235 A CN 102268235A CN 2010101970952 A CN2010101970952 A CN 2010101970952A CN 201010197095 A CN201010197095 A CN 201010197095A CN 102268235 A CN102268235 A CN 102268235A
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Abstract
The invention belongs to the field of infrared absorption material producing, specifically relates to an infrared absorption material prepared by using coal gangue, and a preparation method thereof. The material is characterized in that: the coal gangue is adopted as a raw material; the used coal gangue comprises, by weight, 40-65% of SiO2, 15-45% of Al2O3, less than or equal to 5% of Fe2O3, less than or equal to 2% of CaO, less than or equal to 0.5% of MgO, less than or equal to 1.5% of K2O, less than or equal to 1.5% of Na2O and less than or equal to 25% of the loss on ignition. The preparation method for the infrared absorption material by using the coal gangue comprises the following steps: (1) crushing; (2) fine grinding; (3) heat treating comprising three phases of heating, holding and cooling; (4) grinding. The prepared infrared absorption material provided by the present invention has the following properties: the absorption rate of the material is more than or equal to 0.1 in the wavelength range of 2.5-6.7 mum; the absorption rate of the material is up to 1.76 and low to 0.4 in the wavelength range of 6.7-20 mum. According to the present invention, the raw material cost for the infrared absorption material is substantially reduced; the production process is simplified; high value-added utilization of the coal gangue is realized; the pollution to the environment due to the coal gangue is reduced; the method has wide applicability, and the coal gangue in most areas in our country can be applicable for preparing the infrared absorption material through the method.
Description
Technical field
The invention belongs to the infrared absorbing material production field, specifically is a kind of infrared absorbing material that utilizes the coal gangue manufacturing and preparation method thereof.
Background technology
Infrared absorbing material is the novel optical-thermal conversion material of a class, it has higher photo-thermal conversion performance in specific temperature range, can be used for buildings, metallurgy, petrochemical industry, machinery, automobile and other industries and play energy-conserving action, also can be used for fields such as weaving, plastics, medical treatment and play health-care effect, in recent years, infra-red material also is used for the fields such as hatching cultivation of food fresh keeping, drying even agricultural sector.
The production of infrared absorbing material at present mainly contains two kinds of methods: solid phase method and liquid phase method.The raw material majority that solid phase method uses is oxide compound, as SiO
2, Al
2O
3, CaO, MgO, TiO
2, Fe
2O
3Deng, the preparation method is: with raw material weighing in proportion, mixing and stirring, being heated to high temperature then carries out sintering, grinds behind the cool to room temperature.Liquid phase method mainly uses metal-salt to do raw material, as AlCl
3, CaCl
2, MgCl
2, FeCl
2Deng, the preparation method is: material dissolution is prepared into the aqueous solution in water, mix then, stir, the back that stirs adds material such as ammoniacal liquor and makes it that chemical reaction take place to generate precipitation, then with sedimentation and filtration, wash and carry out drying, at high temperature carry out sintering at last, then product is pulverized and ground.Two kinds of production methods of this of infrared absorbing material all have shortcomings such as production cost height, production process complexity.
Coal gangue is one of maximum industrial solid castoff of China's quantity discharged, totally piles up more than 3,000,000,000 tons at present, and also annual still in speed increment with hundred million tons of 1-2.Coal gangue has taken a large amount of soils, and all can cause severe contamination to surrounding enviroment.For a long time, people are administering and are fully utilizing coal gangue by number of ways always.At present, utilization to coal gangue mainly concentrates on aspects such as brickmaking, making cement raw material, yet because these value-added contents of product are lower, limited to the economic benefit that enterprise produces, therefore enterprise to coal gangue utilize enthusiasm not high, thereby cause at present not high to the utilization ratio of coal gangue.
Coal gangue generally comprises the SiO of 40-65%
2, 15-45% Al
2O
3, and small amount of Fe
2O
3, CaO, MgO, K
2O, Na
2O, and organic combustiblematerials of element such as a certain amount of carbon containing, sulphur also contain some rare metals, sometimes as gallium, vanadium, titanium, manganese, rare earth etc.From chemical ingredients, coal gangue and existing infrared absorbing material have a lot of similarities, based on this point, we think coal gangue processed according to certain method after, might have reasonable infrared property.Like this, by coal gangue is carried out the processing infrared absorbing material, can realize high value added utilization to this trade waste, turn waste into wealth, can produce good economic benefit, social benefit and environmental benefit, have important academic research meaning and engineering using value.
Summary of the invention:
The object of the present invention is to provide a kind of is the infrared absorbing material and preparation method thereof of main material production with the coal gangue.This invention can reduce the production cost of infrared absorbing material on the one hand, can realize the high value added utilization to coal gangue on the other hand.
The present invention relates to a kind of infrared absorbing material that utilizes coal gangue production and preparation method thereof, it is characterized in that with the coal gangue being raw material, prepare infrared absorbing material through fragmentation, grinding, thermal treatment, grinding.The main chemical compositions of coal gangue is SiO
2And Al
2O
3, but place of production difference, concrete content also has difference.The chemical constitution of the coal gangue that the preparation infrared absorbing material is used is the SiO of (mass percent): 40-65%
2, 15-45% Al
2O
3, Fe
2O
3≤ 5%, CaO≤2%, MgO≤0.5%, K
2O≤1.5%, Na
2O≤1.5%, loss on ignition≤25%.
The preparation method who utilizes coal gangue to produce infrared absorbing material is:
(1) with crusher with the fragmentation of lumped coal spoil, particle size after cracking≤15mm;
(2) with Raymond mill the coal gangue fragment is worn into powder, powder granularity can be crossed 325 mesh sieves;
(3) heat-treat.Be characterized as: the coal gangue powder is put into crucible, and the heat treatment furnace of at room temperature packing into heats up with stove; Maximum heating temperature is 500-900 ℃, is incubated 3 hours; Furnace cooling, fire door is closed all the time in process of cooling.
Process furnace can use common desk-top resistance furnace, also can use the process furnace of other type.
(4) after product is cooled to room temperature, takes out and grind, granularity can be crossed 325 mesh sieves.
Beneficial effect of the present invention:
With specific absorption 〉=0.1 of infrared absorbing material in 2.5-6.7 mum wavelength scope of the present invention's preparation, the specific absorption in 6.7-20 mum wavelength scope is up to 1.76, and minimum is 0.4.
The present invention is the raw material production infrared absorbing material with the coal gangue, considers from the raw material angle, and this is lower significantly than using metal-oxide powder and metal salt compound to do the cost of raw material, for the production of infrared absorbing material provides new low-cost raw material; From the preparation method, technology of the present invention is simple, and is lower to the requirement of equipment, and operators'skills is not had particular requirement yet, and therefore, the present invention can reduce production costs significantly, and Application Areas is extensive, and the enterprise that is suitable for multiple scale adopts.
In addition, the present invention is owing to use coal gangue to be production feedstock production infrared absorbing material, and the value ratio of infrared absorbing material is higher, therefore the invention belongs to high value added utilization to coal gangue, expanded the approach that utilizes of coal gangue effectively, reduced the pollution of coal gangue simultaneously, can produce huge economic benefit, social benefit and environmental benefit surrounding enviroment.
The present invention does not have harsh especially requirement to the chemical ingredients of coal gangue, and the most of geographic coal gangue of China can be used for as raw material of the present invention, and is therefore applied widely, running cost is low.
Description of drawings:
Fig. 1 is the production technique process flow sheet for preparing infrared absorbing material with coal gangue.
Embodiment:
Embodiment 1: by shown in Figure 1, getting 2 kilograms of chemical constitutions is SiO
2-45.26%, Al
2O
3-27.58%, Fe
2O
3-1.24%, TiO
2-0.12%, MgO-0.14%, CaO-0.32%, SO3-0.10%, K
2O-0.26%, the coal gangue of loss on ignition-15.73% is as raw material.
Preparation process and processing parameter are:
(1) with crusher with the fragmentation of lumped coal spoil, particle size after cracking≤15mm;
(2) with Raymond mill the coal gangue fragment is worn into powder, powder granularity can be crossed 325 mesh sieves;
(3) heat-treat.Be characterized as: the coal gangue powder is put into crucible, and the desk-top resistance furnace of at room temperature packing into heats up with stove; Maximum heating temperature is 650 ℃, is incubated 3 hours; Furnace cooling, fire door is closed all the time in process of cooling;
(4) after product is cooled to room temperature, takes out and grind, granularity can be crossed 325 mesh sieves.
The performance of the infrared absorbing material of preparation is: the specific absorption in 2.5-6.7 mum wavelength scope is 0.34, and the specific absorption in 6.7-20 mum wavelength scope is up to 1.76, and minimum is 0.6.
Embodiment 2: by shown in Figure 1, getting 2 kilograms of chemical constitutions is SiO
2-40.39%, Al
2O
3-30.06%, Fe
2O
3-2.95%, TiO
2-1.04%, MgO-0.25%, CaO-0.68%, SO3-0.22%, K
2O-0.67%, the coal gangue of loss on ignition-23.28% is as raw material.
Preparation process and processing parameter are:
(1) with crusher with the fragmentation of lumped coal spoil, particle size after cracking≤15mm;
(2) with Raymond mill the coal gangue fragment is worn into powder, powder granularity can be crossed 325 mesh sieves;
(3) heat-treat.Be characterized as: the coal gangue powder is put into crucible, and the desk-top resistance furnace of at room temperature packing into heats up with stove; Maximum heating temperature is 650 ℃, is incubated 3 hours; Furnace cooling, fire door is closed all the time in process of cooling;
(4) after product is cooled to room temperature, takes out and grind, granularity can be crossed 325 mesh sieves.
The performance of the infrared absorbing material of preparation is: the specific absorption in 2.5-6.7 mum wavelength scope is 0.1, and the specific absorption in 6.7-20 mum wavelength scope is up to 1.45, and minimum is 0.4.
Embodiment 3: by shown in Figure 1, getting 2 kilograms of chemical constitutions is SiO
2-45.26%, Al
2O
3-27.58%, Fe
2O
3-1.24%, TiO
2-0.12%, MgO-0.14%, CaO-0.32%, SO3-0.10%, K
2O-0.26%, the coal gangue of loss on ignition-15.73% is as raw material.
Preparation process and processing parameter are:
(1) with crusher with the fragmentation of lumped coal spoil, particle size after cracking≤15mm;
(2) with Raymond mill the coal gangue fragment is worn into powder, powder granularity can be crossed 325 mesh sieves;
(3) heat-treat.Be characterized as: the coal gangue powder is put into crucible, and the desk-top resistance furnace of at room temperature packing into heats up with stove; Maximum heating temperature is 900 ℃, is incubated 3 hours; Furnace cooling, fire door is closed all the time in process of cooling;
(4) after product is cooled to room temperature, takes out and grind, granularity can be crossed 325 mesh sieves.
The performance of the infrared absorbing material of preparation is: the specific absorption in 2.5-6.7 mum wavelength scope is 0.26, and the specific absorption in 6.7-20 mum wavelength scope is up to 1.45, and minimum is 0.42.
Embodiment 4: by shown in Figure 1, getting 2 kilograms of chemical constitutions is SiO
2-40.39%, Al
2O
3-30.06%, Fe
2O
3-2.95%, TiO
2-1.04%, MgO-0.25%, CaO-0.68%, SO3-0.22%, K
2O-0.67%, the coal gangue of loss on ignition-23.28% is as raw material.
Preparation process and processing parameter are:
(1) with crusher with the fragmentation of lumped coal spoil, particle size after cracking≤15mm;
(2) with Raymond mill the coal gangue fragment is worn into powder, powder granularity can be crossed 325 mesh sieves;
(3) heat-treat.Be characterized as: the coal gangue powder is put into crucible, and the desk-top resistance furnace of at room temperature packing into heats up with stove; Maximum heating temperature is 900 ℃, is incubated 3 hours; Furnace cooling, fire door is closed all the time in process of cooling;
(4) after product is cooled to room temperature, takes out and grind, granularity can be crossed 325 mesh sieves.
The performance of the infrared absorbing material of preparation is: the specific absorption in 2.5-6.7 mum wavelength scope is 0.15, and the specific absorption in 6.7-20 mum wavelength scope is up to 1.05, and minimum is 0.65.
Claims (2)
1. the infrared absorbing material that utilizes coal gangue to make is characterized in that it is raw material with the coal gangue, and the weight chemical constitution of used coal gangue is: the SiO of 40-65%
2, 15-45% Al
2O
3, Fe
2O
3≤ 5%, CaO≤2%, MgO≤0.5%, K
2O≤1.5%, Na
2O≤1.5%, loss on ignition≤25%.
2. the preparation method who utilizes the infrared absorbing material that coal gangue makes according to claim 1 is characterized in that it is realized by following step:
(1) with crusher with the fragmentation of lumped coal spoil, particle size after cracking≤15mm;
(2) with Raymond mill the coal gangue fragment is worn into powder, powder granularity can be crossed 325 mesh sieves;
(3) heat-treat; Be characterized as: the coal gangue powder is put into crucible, and the heat treatment furnace of at room temperature packing into heats up with stove; Maximum heating temperature is 500-900 ℃, is incubated 3 hours; Furnace cooling, fire door is closed all the time in process of cooling; Process furnace can use common desk-top resistance furnace, also can use the process furnace of other type;
(4) after product is cooled to room temperature, takes out and grind, granularity can be crossed 325 mesh sieves.
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|---|---|---|---|
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| CN2010101970952A CN102268235A (en) | 2010-06-01 | 2010-06-01 | Infrared absorption material prepared by using coal gangue, and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253924A (en) * | 2013-05-14 | 2013-08-21 | 由伟 | Coal gangue-based artificial ink stone and manufacturing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4226632A (en) * | 1978-09-18 | 1980-10-07 | Tatabanyai Szenbanyak | Process for producing high-purity alumina and hydraulic cement |
| DE3026453A1 (en) * | 1978-09-14 | 1982-02-11 | Heinz Ing.(grad.) 4390 Gladbeck Hölter | Underground-situated coal and gangue-separating installation - uses screen surfaces subjected to vibration or blowing and includes breaker and conveyor belt |
| DE3737046A1 (en) * | 1987-10-31 | 1989-05-11 | Hoelter Heinz | Processing and conversion of contaminated hazardous wastes into products for manufacturing building materials for underground mining |
| CN1772833A (en) * | 2005-10-25 | 2006-05-17 | 上海师范大学 | Infrared absorbing material and its prepn |
| CN1800022A (en) * | 2005-12-20 | 2006-07-12 | 山西大学 | Method for producing alumina by coal gangue |
-
2010
- 2010-06-01 CN CN2010101970952A patent/CN102268235A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3026453A1 (en) * | 1978-09-14 | 1982-02-11 | Heinz Ing.(grad.) 4390 Gladbeck Hölter | Underground-situated coal and gangue-separating installation - uses screen surfaces subjected to vibration or blowing and includes breaker and conveyor belt |
| US4226632A (en) * | 1978-09-18 | 1980-10-07 | Tatabanyai Szenbanyak | Process for producing high-purity alumina and hydraulic cement |
| DE3737046A1 (en) * | 1987-10-31 | 1989-05-11 | Hoelter Heinz | Processing and conversion of contaminated hazardous wastes into products for manufacturing building materials for underground mining |
| CN1772833A (en) * | 2005-10-25 | 2006-05-17 | 上海师范大学 | Infrared absorbing material and its prepn |
| CN1800022A (en) * | 2005-12-20 | 2006-07-12 | 山西大学 | Method for producing alumina by coal gangue |
Non-Patent Citations (3)
| Title |
|---|
| 冯奇: "煤矸石热活化及水泥水化的红外分析", 《建筑材料学报》 * |
| 宫晨琛，等: "煅烧活化煤矸石的机理探讨", 《材料科学与工程学报》 * |
| 李永峰，等: "煤矸石煅烧活化研究", 《化工矿物与加工》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253924A (en) * | 2013-05-14 | 2013-08-21 | 由伟 | Coal gangue-based artificial ink stone and manufacturing method thereof |
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Application publication date: 20111207 |