CN108249767B - Method for producing heat-insulating foam glass by using furnace slag - Google Patents
Method for producing heat-insulating foam glass by using furnace slag Download PDFInfo
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- CN108249767B CN108249767B CN201810394337.3A CN201810394337A CN108249767B CN 108249767 B CN108249767 B CN 108249767B CN 201810394337 A CN201810394337 A CN 201810394337A CN 108249767 B CN108249767 B CN 108249767B
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C11/00—Multi-cellular glass ; Porous or hollow glass or glass particles
- C03C11/007—Foam glass, e.g. obtained by incorporating a blowing agent and heating
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/06—Other methods of shaping glass by sintering, e.g. by cold isostatic pressing of powders and subsequent sintering, by hot pressing of powders, by sintering slurries or dispersions not undergoing a liquid phase reaction
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/08—Other methods of shaping glass by foaming
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
- C03C1/002—Use of waste materials, e.g. slags
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/28—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material
- C03C17/32—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material with synthetic or natural resins
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Dispersion Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Glass Compositions (AREA)
Abstract
The invention relates to a method for producing heat insulation foam glass by utilizing slag, belonging to the field of high-valued utilization of wastes, the foam glass is produced by taking waste incineration slag as a main raw material, the waste incineration slag is ground and sieved after removing impurities, sodium carbonate solution is added for uniform mixing, the mixture is naturally cooled to be caked after microwave-assisted heating, a foaming agent, a foam stabilizer, a fluxing agent and an accelerant are added after a massive raw material is crushed, then all the materials are crushed and sieved and uniformly mixed, the mixture is placed into a mold, the mold is placed into a sintering furnace, the foam glass raw material is sequentially subjected to preheating, softening, foaming and annealing stages to obtain sintered massive foam glass, a colorless and transparent acrylic resin organic protective film is coated on the surface of the massive foam glass, and the heat insulation foam glass with excellent performance can be obtained after cooling. The invention takes the waste slag as the main raw material, has reasonable process parameters, fully embodies the secondary utilization of waste resources and realizes the purposes of environmental protection and high-value utilization.
Description
Technical Field
The invention relates to the technical field of high-value utilization, energy conservation and consumption reduction of waste incineration slag, in particular to a method for producing heat-insulating foam glass by using slag.
Background
With the rapid development of national economy, the yield of household garbage is increased greatly. According to recent survey data, domestic garbage generated in China per year is up to 1.7 hundred million tons at present, the speed of domestic garbage is rapidly increased by 10% per year, but the domestic garbage which can be subjected to harmless treatment only accounts for about 66%, and a large amount of garbage which cannot be treated can only be simply treated in a landfill mode. The method not only occupies a large amount of land, but also pollutes surrounding water resources, and brings great inconvenience to national production and life.
The garbage incineration method is a high-temperature heat treatment technique, namely, a certain amount of excess air and garbage are subjected to oxidation combustion reaction in an incinerator at a high temperature (800-1000 ℃). The reduction effect of treating the household garbage by the incineration method is obvious, the garbage quality can be generally reduced by 70 percent, and the volume is reduced by 90 percent. The waste incineration has the characteristics of obvious volume reduction effect and thorough harmless degree, waste heat can be recovered for power generation when the waste heat value is higher and the treatment reaches a certain scale, the occupied area is small, and the influence on the surrounding environment is small, so that the waste incineration is widely applied.
The widespread use of the waste incineration process necessarily produces a large amount of slag, the main disposal of which is to feed the slag to landfills for disposal. In order to fully utilize slag resources and save increasingly tense landfill sites, many enterprises begin to research the feasibility of slag resource utilization in consideration of economic cost.
The resource utilization of the waste incineration slag is fully studied at home and abroad. For example, in patent CN 1331796A, the domestic waste incineration slag is used for producing cement clinker, and all physical properties of the prepared cement meet the GB/T3183-2003 standard of building cement, but the utilization rate of the slag is low and is only about 10%. The invention patent CN 1558030A discloses a method for producing civil engineering structure layer by using domestic garbage incineration slag, which uses the incineration slag as aggregate for road base material of municipal roads or replaces soil source as covering material of domestic garbage landfill, part of heavy metals contained in the slag easily cause secondary pollution, and has potential influence on environment, and the heavy metal substances and free calcium oxide and free magnesium oxide with unstable contents cause poor durability of the road base material.
The waste incineration slag is applied to the production of the foam glass, so that not only can resources be fully utilized, but also the problem of environmental pollution caused by the waste slag can be solved, the land is saved, the treatment cost is reduced, and considerable economic benefits are brought.
The foam glass is an inorganic non-metallic glass material with uniform bubbles and a diameter of 1-2 mm, which is prepared from cullet, a foaming agent, a modified additive, a foaming promoter and the like through fine crushing, uniform mixing, high-temperature melting, foaming and annealing. Because the foam glass has countless small bubbles inside, the foam glass has the advantages of different performance from common glass, small density, high strength, small heat conducting system and other excellent physical properties, and practical properties of heat preservation, heat insulation, sound absorption, moisture protection, fire prevention and the like. As one of the new heat insulating materials, foam glass has an increasingly important role in the fields of high-temperature heat insulation, moisture-proof engineering, sound absorption engineering, and the like due to its excellent properties. The material development of the foam glass is based on the field of waste utilization, the environmental pollution is avoided, the production process is clean, and no secondary pollution is caused.
Disclosure of Invention
Aiming at the problems that most of the existing foam glass has poor stability, low strength and no high temperature resistance, and aiming at solving the defects of the prior art, the invention aims to provide a method for producing heat-insulating foam glass by utilizing slag, which is reliable to implement, has low cost and realizes resource recycling.
In order to achieve the technical purpose, the invention adopts the technical scheme that:
a method for producing heat insulation foam glass by utilizing slag comprises the steps of carrying out crushing and screening pretreatment on waste incineration slag, removing coarse particles with the particle size larger than 31.5mm, then mixing the screened waste incineration slag with sodium carbonate, a foaming agent, a foam stabilizer and a fluxing agent, and then sintering and cooling in sequence to obtain the foam glass.
Further, the foam glass comprises the following raw material components in parts by weight:
43-54 parts of waste incineration slag;
42.5-55 parts of sodium carbonate;
0.8-2.5 parts of a foaming agent;
0.3-0.6 part of a foam stabilizer;
0.6-0.8 part of fluxing agent.
Preferably, the waste incineration slag is slag powder obtained by drying powder of incineration slag generated in the waste incineration process, and the granularity of the slag powder is more than 150 meshes.
Preferably, the foaming agent is formed by mixing at least one of sodium bicarbonate, calcium carbonate, soda ash, carbon black and silicon carbide, and the granularity of the foaming agent is more than 150 meshes.
Preferably, the foam stabilizer is formed by mixing at least one of polyacrylamide, polyvinyl alcohol, cellulose and alkylolamide, and the granularity of the foam stabilizer is more than 150 meshes.
Preferably, the fluxing agent is sodium fluosilicate, borax, sodium sulfate, calcium sulfate and MnO
2The granularity of the fluxing agent is more than 150 meshes.
A method for producing heat insulation foam glass by using slag comprises the following steps:
(1) weighing 35-45 parts of waste incinerator slag and 45-55 parts of sodium carbonate to prepare a solution, uniformly mixing, performing auxiliary heating on a mixed system through microwaves, naturally cooling the mixed system to form blocks, crushing the blocks, adding 0.1-3.9 parts of foaming agent, 0.1-0.9 part of foam stabilizer and 0.1-0.9 part of fluxing agent, and uniformly mixing to obtain a foam glass mixed raw material;
(2) putting the foam glass mixed raw material prepared in the step (1) into a mold, preheating for 25-30 min at the temperature of 350-450 ℃, then heating the preheated foam glass mixed raw material to 700 ℃ for sintering treatment, and then heating to 850 ℃ for constant-temperature foaming treatment for 30-40 min;
(3) cooling the temperature of the foamed glass mixed raw material after the foaming treatment to 600 ℃, and carrying out constant temperature annealing for 20-30 min to obtain blocky foamed glass;
(4) and coating a layer of transparent organic protective film on the surface of the annealed massive foam glass, and completely cooling the massive foam glass to obtain the heat-insulating foam glass.
Further, the transparent organic protective film in the step (4) is acrylic resin or polyvinyl acetate resin.
By adopting the technical scheme, the beneficial effects of the scheme of the invention are as follows:
(1) the main raw material of the invention is the furnace slag which has no corrosivity and no toxicity to other articles, thereby eliminating the pollution of solid waste to the environment, turning waste into treasure and realizing the cyclic utilization of resources;
(2) the foam glass produced by the scheme of the invention has a uniform small-pore structure, the pore diameter is generally 0.2-5.5 mm, the porosity is generally 80-90%, the compressive strength is good, the compressive strength in the foaming parallel direction is generally 1-1.5 MPa, and the compressive strength in the foaming vertical direction is 0.4-0.8 MPa;
(3) the foamed glass prepared by the scheme of the invention has the characteristics of light weight, multiple pores, high porosity, fine and uniform pores, high water retention rate, large adsorption capacity and the like, and can be widely applied to waterproof materials, heat insulation materials, construction sites, sound absorption projects and the like.
Detailed Description
The scheme of the invention is further illustrated by the following specific embodiments:
a method for producing heat insulation foam glass by utilizing slag comprises the steps of carrying out crushing and screening pretreatment on waste incineration slag, removing coarse particles with the particle size larger than 31.5mm, then mixing the screened waste incineration slag with sodium carbonate, a foaming agent, a foam stabilizer and a fluxing agent, and then sintering and cooling in sequence to obtain the foam glass.
Further, the foam glass comprises the following raw material components in parts by weight:
43-54 parts of waste incineration slag;
42.5-55 parts of sodium carbonate;
0.8-2.5 parts of a foaming agent;
0.3-0.6 part of a foam stabilizer;
0.6-0.8 part of fluxing agent.
Preferably, the waste incineration slag is slag powder obtained by drying powder of incineration slag generated in the waste incineration process, and the granularity of the slag powder is more than 150 meshes.
Preferably, the foaming agent is formed by mixing at least one of sodium bicarbonate, calcium carbonate, soda ash, carbon black and silicon carbide, and the granularity of the foaming agent is more than 150 meshes.
Preferably, the foam stabilizer is formed by mixing at least one of polyacrylamide, polyvinyl alcohol, cellulose and alkylolamide, and the granularity of the foam stabilizer is more than 150 meshes.
Preferably, the fluxing agent is sodium fluosilicate, borax, sodium sulfate, calcium sulfate and MnO
2The granularity of the fluxing agent is more than 150 meshes.
Example 1
A method for producing heat insulation foam glass by using slag comprises the following steps:
(1) after impurity removal and cleaning, the waste incinerator slag is placed in an oven for drying, then the waste incinerator slag is added into dry ball milling equipment for ball milling until the granularity of the waste incinerator slag can pass through a 150-mesh sieve, and the sieved waste incinerator slag is placed in a dry environment for temporary storage;
(2) weighing and uniformly mixing a solution prepared from 43 parts of screened waste incinerator slag and 55 parts of sodium carbonate, performing auxiliary heating on the mixed system through microwaves, naturally cooling the mixed system to form blocks, crushing the blocks, adding 0.8 part of foaming agent, 0.4 part of foam stabilizer and 0.8 part of fluxing agent, and uniformly mixing to obtain a foam glass mixed raw material, wherein the components are uniformly mixed to uniformly disperse bubbles;
(3) putting the foam glass mixed raw material prepared in the step (2) into a mould, preheating for 25min at the temperature of 450 ℃, then heating the preheated foam glass mixed raw material to 700 ℃ for sintering treatment, and then heating to 850 ℃ for constant-temperature foaming treatment for 35 min;
(4) cooling the temperature of the foamed glass mixed raw material after the foaming treatment to 600 ℃, and carrying out constant temperature annealing for 20min to obtain blocky foamed glass;
(5) and coating a layer of transparent organic protective film on the surface of the annealed massive foam glass, and completely cooling the massive foam glass to obtain the heat-insulating foam glass.
The material characterization of the insulating foam glass prepared in this example was carried out to obtain a porosity of 85%, a pore diameter of 250 μm, a water absorption of 120%, and a bulk density of 1000kg/m
3The compressive strength is 1.1 MPa.
The foam glass finished product obtained by the embodiment integrates the advantages of the traditional heat preservation and insulation material, has the advantages of small volume weight, high strength, corrosion resistance, good fire resistance, low water absorption rate, low heat conductivity and the like, is a material for heat preservation and cold preservation, and is widely applied to various places. The fireproof shockproof fireproof paint can be used in severe environments such as low-temperature and high-temperature alternation, humidity and the like, cannot deteriorate after being used for a long time, and can play roles in fire prevention and shock prevention.
Example 2
A method for producing heat insulation foam glass by using slag comprises the following steps:
(1) after impurity removal and cleaning, the waste incinerator slag is placed in an oven for drying, then the waste incinerator slag is added into dry ball milling equipment for ball milling until the granularity of the waste incinerator slag can pass through a 150-mesh sieve, and the sieved waste incinerator slag is placed in a dry environment for temporary storage;
(2) weighing and uniformly mixing a solution prepared from 50 parts of screened waste incinerator slag and 47 parts of sodium carbonate, performing auxiliary heating on the mixed system through microwaves, naturally cooling the mixed system to form blocks, crushing the blocks, adding 1.8 parts of foaming agent, 0.6 part of foam stabilizer and 0.6 part of fluxing agent, and uniformly mixing to obtain a foam glass mixed raw material, wherein the components are uniformly mixed to uniformly disperse bubbles;
(3) putting the foam glass mixed raw material prepared in the step (2) into a mould, preheating for 28min at the temperature of 350 ℃, then heating the preheated foam glass mixed raw material to 700 ℃ for sintering treatment, and then heating to 850 ℃ for constant-temperature foaming treatment for 40 min;
(4) cooling the temperature of the foamed glass mixed raw material after the foaming treatment to 600 ℃, and carrying out constant temperature annealing for 30min to obtain blocky foamed glass;
(5) and coating a layer of transparent organic protective film on the surface of the annealed massive foam glass, and completely cooling the massive foam glass to obtain the heat-insulating foam glass.
The material characterization of the insulating foam glass prepared in this example was carried out to obtain a foam glass having a porosity of 80%, a pore diameter of 310 μm, a water absorption of 110%, and a bulk density of 1800kg/m
3The compressive strength is 1.2 MPa.
The foam glass finished product obtained by the embodiment has higher mechanical strength, small specific gravity, strong water absorption and retention and excellent air permeability due to the pore size, so that the foam glass finished product can prevent insects and inhibit bacteria, can be used as a decorative outer wall of a building, and cannot age and deteriorate even being subjected to ultraviolet rays or heat radiation for a long time.
Example 3
A method for producing heat insulation foam glass by using slag comprises the following steps:
(1) after impurity removal and cleaning, the waste incinerator slag is placed in an oven for drying, then the waste incinerator slag is added into dry ball milling equipment for ball milling until the granularity of the waste incinerator slag can pass through a 150-mesh sieve, and the sieved waste incinerator slag is placed in a dry environment for temporary storage;
(2) weighing and uniformly mixing 54 parts of garbage incinerator slag after screening treatment and 42.5 parts of sodium carbonate to prepare a solution, then carrying out auxiliary heating on a mixed system through microwaves, naturally cooling the mixed system to form blocks, crushing the blocks, adding 2.5 parts of foaming agent, 0.3 part of foam stabilizer and 0.7 part of fluxing agent, and uniformly mixing to obtain a foam glass mixed raw material, wherein the components are uniformly mixed to uniformly disperse bubbles;
(3) putting the foam glass mixed raw material prepared in the step (2) into a mould, preheating for 30min at the temperature of 400 ℃, then heating the preheated foam glass mixed raw material to 700 ℃ for sintering treatment, and then heating to 850 ℃ for constant-temperature foaming treatment for 30 min;
(4) cooling the temperature of the foamed glass mixed raw material after the foaming treatment to 600 ℃, and carrying out constant temperature annealing for 25min to obtain blocky foamed glass;
(5) and coating a layer of transparent organic protective film on the surface of the annealed massive foam glass, and completely cooling the massive foam glass to obtain the heat-insulating foam glass.
The material characterization of the insulating foam glass prepared in this example was carried out to obtain a porosity of 88%, a pore diameter of 350um, a water absorption of 90%, and a bulk density of 1200kg/m
3The compressive strength is 1.5 MPa.
The foam glass finished product obtained by the embodiment has the characteristic of high adsorption and water purification performance, and can be used for purifying and decomposing dirt in water, such as river sewage, domestic sewage, aquaculture water and the like, after being crushed, the foam glass obtained by the embodiment is put into a water source; the water bank is protected, and the pressure on the upper part of the river bank, the coast and the dam is reduced.
The foregoing is merely illustrative of the present invention, and it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A method for producing heat insulation foam glass by using slag is characterized in that: crushing and screening the waste incineration slag, removing coarse particles with the particle size larger than 31.5mm, mixing the screened waste incineration slag with sodium carbonate, a foaming agent, a foam stabilizer and a fluxing agent, sintering and cooling in sequence to prepare foam glass;
the foam glass comprises the following raw material components in parts by weight:
43-54 parts of waste incineration slag;
42.5-55 parts of sodium carbonate;
0.8-2.5 parts of a foaming agent;
0.3-0.6 part of a foam stabilizer;
0.6-0.8 part of fluxing agent;
the method specifically comprises the following steps:
(1) weighing 43-54 parts of waste incinerator slag and 42.5-55 parts of sodium carbonate to prepare a solution, uniformly mixing, performing auxiliary heating on a mixed system through microwaves, naturally cooling the mixed system to form blocks, crushing the blocks, adding 0.8-2.5 parts of foaming agent, 0.3-0.6 part of foam stabilizer and 0.6-0.8 part of fluxing agent, and uniformly mixing to obtain a foam glass mixed raw material;
(2) putting the foam glass mixed raw material prepared in the step (1) into a mold, preheating for 20-30 min at the temperature of 350-450 ℃, then heating the preheated foam glass mixed raw material to 700 ℃ for sintering treatment, and then heating to 850 ℃ for constant-temperature foaming treatment for 30-40 min;
(3) cooling the temperature of the foamed glass mixed raw material after the foaming treatment to 600 ℃, and carrying out constant temperature annealing for 20-30 min to obtain blocky foamed glass;
(4) and coating a layer of transparent organic protective film on the surface of the annealed massive foam glass, and completely cooling the massive foam glass to obtain the heat-insulating foam glass.
2. The method for producing an insulating foam glass using slag according to claim 1, wherein: the waste incineration slag is slag powder obtained by drying powder of incineration slag generated in the waste incineration process, and the granularity of the slag powder is more than 150 meshes.
3. The method for producing an insulating foam glass using slag according to claim 1, wherein: the foaming agent is formed by mixing at least one of sodium bicarbonate, calcium carbonate, soda ash, carbon black and silicon carbide, and the granularity of the foaming agent is more than 150 meshes.
4. The method for producing an insulating foam glass using slag according to claim 1, wherein: the foam stabilizer is formed by mixing at least one of polyacrylamide, polyvinyl alcohol, cellulose and alkylolamide, and the granularity of the foam stabilizer is more than 150 meshes.
5. The method for producing an insulating foam glass using slag according to claim 1, wherein: the fluxing agent is sodium fluosilicate, borax, sodium sulfate, calcium sulfate and MnO
2The granularity of the fluxing agent is more than 150 meshes.
6. The method for producing an insulating foam glass using slag according to claim 1, wherein: the transparent organic protective film in the step (4) is acrylic resin or polyvinyl acetate resin.
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| CN101274819A (en) * | 2008-02-22 | 2008-10-01 | 中国科学院生态环境研究中心 | Packaged technology for synthesizing foamed glass by using medical refuse incineration residue |
| CN101913756A (en) * | 2010-07-21 | 2010-12-15 | 刘阳生 | Glass-state waste residue resource utilization method |
| CN103073185A (en) * | 2013-02-04 | 2013-05-01 | 同济大学 | Low silicon oxide content foam glass and preparation method thereof |
| CN103420612A (en) * | 2013-07-31 | 2013-12-04 | 同济大学 | Method for preparing organic dry material and inorganic batch mixture from household garbage and for preparing microcrystalline foam glass material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030084683A1 (en) * | 2001-11-05 | 2003-05-08 | Robert Dejaiffe | Foam glass and method of making |
| CN104355541B (en) * | 2014-10-16 | 2016-08-31 | 中国建筑材料科学研究总院 | A kind of black slag crystallite stone material and preparation method thereof |
| CN104891815B (en) * | 2015-05-25 | 2017-10-24 | 东北大学 | A kind of method that utilization high-temperature liquid state metallurgical cinder prepares foam glass |
| CN106630648A (en) * | 2016-12-15 | 2017-05-10 | 武汉钢铁股份有限公司 | Method for producing foamed glass by melting blast furnace slag |
| CN107056073A (en) * | 2017-03-13 | 2017-08-18 | 常州易能科技有限公司 | A kind of method that blast furnace slag produces foamed glass |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101274819A (en) * | 2008-02-22 | 2008-10-01 | 中国科学院生态环境研究中心 | Packaged technology for synthesizing foamed glass by using medical refuse incineration residue |
| CN101913756A (en) * | 2010-07-21 | 2010-12-15 | 刘阳生 | Glass-state waste residue resource utilization method |
| CN103073185A (en) * | 2013-02-04 | 2013-05-01 | 同济大学 | Low silicon oxide content foam glass and preparation method thereof |
| CN103420612A (en) * | 2013-07-31 | 2013-12-04 | 同济大学 | Method for preparing organic dry material and inorganic batch mixture from household garbage and for preparing microcrystalline foam glass material |
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