CN105777002A - High-performance synthetic slag block material and preparation method thereof - Google Patents
High-performance synthetic slag block material and preparation method thereof Download PDFInfo
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- CN105777002A CN105777002A CN201610131219.4A CN201610131219A CN105777002A CN 105777002 A CN105777002 A CN 105777002A CN 201610131219 A CN201610131219 A CN 201610131219A CN 105777002 A CN105777002 A CN 105777002A
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- slag
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B1/00—Preparing the batches
- C03B1/02—Compacting the glass batches, e.g. pelletising
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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
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
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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
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a high-performance synthetic slag block material.The high-performance synthetic slag block material is prepared from, by mass, cement 8%-15%, granulated blast furnace slag 45%-60%, quartz sand 6%-15%, pulverized fuel ash 6%-15% and waste rock wool 10%-15%.Because output of steel slag (dried slag) of steelworks has banned in our country, slag wool production needs the granulated blast furnace slag (water slag), the slag wool production costs are increased, and a process becomes complicated.The high-performance synthetic slag block material can be produced by using the granulated blast furnace slag, and the slag wool production process can be simple.The excellent effects of waste utilization and environmental protection are successively achieved, and the high-performance synthetic slag block material has the advantages of being controllable in refractoriness, chemical component proportion, product block diameter and product density and the like.
Description
Technical field
The present invention relates to chemical field, particularly relate to a kind of high-performance synthesis slag bulk and preparation method thereof.
Background technology
A kind of grain slag discharged from blast furnace when blast-furnace cinder is manUfaCtUre of pig iron.When manUfaCtUre of pig iron, add the raw material of blast furnace, except iron ore and fuel (coke), also have flux.When furnace temperature reaches 1400 DEG C～1600 DEG C, flux generates the pig iron and slag with iron ore generation pyroreaction.The eutectic mixture that blast-furnace cinder is made up of stone-like pulse, ash, flux and other impurity that can not enter in the pig iron.Slag is one of important composition of " three wastes " in commercial production, and it produces from digging, washing, smelting, purification, processing, each link of use, and wherein a large portion is silicate.Industrial silicon hydrochlorate grain slag lacks biological activity mostly, and what have also has bio-toxicity, accounts for heap ground and even also can not can endanger the mankind by growing plant.
Being not used to the waste material quartz sand making glass, common processing method is landfill or melts down and again refine, and melts down and again refines costly, and landfill can produce rubbish and may affect soil quality.
Flyash, is receive to catch the fine ash got off from the flue gas after coal combustion, and flyash is the primary solids refuse that coal-burning power plant discharges.The main oxides of power plants flyash consists of: silicon dioxide (SiO2), aluminium sesquioxide (Al2O3), ferrum oxide (FeO), iron sesquioxide (Fe2O3), calcium oxide (CaO), titanium oxide (TiO2) etc..Flyash is one of industrial grain slag that the current discharge capacity of China is bigger, and along with the development of power industry, the flyash discharge capacity of coal-burning power plant increases year by year.Substantial amounts of flyash is untreated, will produce airborne dust, atmosphere pollution；River can be caused to silt up if entering water system, and human body and biology also can be worked the mischief by toxic chemical substance therein.The flyash of current country level can be divided into three grades:
GB one-level: high-quality fly ash and high efficiency water reducing agent complex technique can be adopted to produce high-grade concrete, be mainly used in Portland cement and mixed earth factory.
GB two grades: secondary high-quality fly ash is particularly well-suited to preparation pump concrete, mass concrete, impervious structural concrete, sulfate resistance concrete and anti-soft water corrosion concrete and underground, Underwater Engineering concrete, prepakt concrete and grinding coagulation soil.
GB three grades: this type of flyash concrete has the advantages such as workability is good, pumpability strong, finish improvement, impact resistance raising, frost resistance enhancing.But commercial production can not use three grades of flyash at present.
Need time traditional handicraft makes mineral wool to add basalt and dolomite as adjuvant.Basalt is a kind of base effusive rock, mainly can at deep-sea oceanic ridge, archipelago in ocean basin, and active continental margin and inland fissure eruption mouth are exploited, and exploitation difficulty is big, belongs to mineral resources.DOLOMITE CRYSTALS belongs to the carbonate mineral of trigonal system, dolomite is present in crystalline limestone and other is rich in the metamorphic rock of magnesium, part originates in the hole of hydrothermal solution mineral ore and In Carbonate Rock, once in a while as the cement of various sedimentary rocks, for a kind of rock-forming mineral modal in carbonate rock.Massif environment can be caused and have a strong impact on by exploitation dolomite, destroys natural environment, and cost of winning is of a relatively high, causes that use cost improves.Country has ordered to forbid dolomite and basaltic private are dug and has disorderly adopted simultaneously, causes that the price of both Ores improves further.
When making mineral wool, raw material needs combustion of coke to melt, and generally producing one ton of mineral wool needs to consume 300Kg coke.Coke burns produce substantial amounts of carbon dioxide (CO completely2), carbon dioxide is the one of greenhouse gases, is also one of reason causing global warming, and global climate is had certain negative effect by substantial amounts of CO2 emission.Coke imperfect combustion can produce carbon monoxide (CO), carbon monoxide is a kind of colourless, odorless, non-irritating toxic gas, it is practically insoluble in water, not easily produces chemical reaction with other materials in atmosphere, therefore can stop in an atmosphere 2～3 years as long as.If draining in a large number in air and health can being produced greatly negative effect, carbon monoxide poisoning time serious, even can be caused.It addition, combustion of coke can produce sulfur dioxide (SO2), sulfur dioxide is one of major pollutants of air, can form sulfurous acid, and sulfurous acid is the main component of acid rain when carbon dioxide is dissolved in water time.
The rock wool that rock cotton board contains more slag ball in producing is picked out becomes waste rock wool, and melted cullet body is also one of grain slag waste material in rock wool production process, and these waste materials are due to difficult degradation, contaminated environment, and major part is dumped buries.This part grain slag amount of waste material of getting off every year tons up to ten thousand at most of several kilotons at least, topple over and bury not only waste of manpower, transport power, and in the face of very big environmental protection pressure, future architecture garbage as resource utilization can make building waste zero padding bury, rock wool factory grain slag waste material rethink with building waste landfill will become impossible.
Prior art has shortcomings in that:
Chemical composition is unfixing or improper, and producing user does not have assay device, is unfavorable for material mixture ratio, it is easy to cause unstable product quality and waste of fuel.
Block footpath is not of uniform size, and powder face composition is more, adds in proportion, can increase production cost after needing screening in process of production.
Product price and supply are not fixed, can with the factor change such as market, season.Cost control and the price of enterprise can be had undesirable effect.
Summary of the invention
The technical problem to be solved in the present invention is to provide the high-performance synthesis slag bulk that a kind of simple in construction, cost are low, simple for production.
The preparation method that present invention also offers a kind of described high-performance synthesis slag bulk, described method is easy and simple to handle, cost is low, pollution-free.
A kind of high-performance synthesis slag bulk, is made up of the material of following mass percent:
Cement: 8%～15%；
Granulated blast-furnace slag: 45%～60%；
Quartz sand: 6%～15%；
Flyash: 6%～15%；
Waste rock wool: 10%～15%.
High-performance of the present invention synthesis slag bulk, wherein, described cement is Portland cement.
High-performance of the present invention synthesis slag bulk, wherein, described granulated blast-furnace slag is steel plant's grain slag.
High-performance of the present invention synthesis slag bulk, wherein, described quartz sand is the quartz sand powder or the polishing remaining quartz sand powder of glass that are not suitable for producing glass.
High-performance of the present invention synthesis slag bulk, wherein, described flyash is three grades of flyash of country.
High-performance of the present invention synthesis slag bulk, it is the one in following four:
(1) described high-performance synthesis slag bulk is made up of the material of following mass percent:
Cement: 15%；
Granulated blast-furnace slag: 60%；
Quartz sand: 6%；
Flyash: 9%；
Waste rock wool: 10%；
(2) described high-performance synthesis slag bulk is made up of the material of following mass percent:
Cement: 8%；
Granulated blast-furnace slag: 52%；
Quartz sand: 10%；
Flyash: 15%；
Waste rock wool: 15%；
(3) described high-performance synthesis slag bulk is made up of the material of following mass percent:
Cement: 13%；
Granulated blast-furnace slag: 45%；
Quartz sand: 15%；
Flyash: 14%；
Waste rock wool: 13%；
(4) described high-performance synthesis slag bulk is made up of the material of following mass percent:
Cement: 11%；
Granulated blast-furnace slag: 58%；
Quartz sand: 11%；
Flyash: 6%；
Waste rock wool: 14%.
High-performance of the present invention synthesis slag bulk, for column, its cross section is circle, ellipse, rhombus, hexagon or octagon.
The preparation method of a kind of described high-performance synthesis slag bulk, it comprises the steps: granulated blast-furnace slag, quartz sand, flyash and waste rock wool to be proportionally respectively put in four preparation storehouses, and is put in cement bin by Portland cement；Putting in blender by above five kinds of raw materials, the water adding 10% stirs 1-3 minute, and the raw material stirred is put into compressing formation semi-finished product in non-baking brick machine, and described semi-finished product natural drying is obtained product after 1-2 days.
The preparation method of high-performance of the present invention synthesis slag bulk, wherein, in preparation process, temperature is be more than or equal to 5 DEG C.
The preparation method of high-performance of the present invention synthesis slag bulk, wherein, described blender is arranged on the inside of described non-baking brick machine, and the stir storehouse of described blender is connected with the raw material cabin of described non-baking brick machine；The power of described blender and described non-baking brick machine is 22KW.
High-performance of the present invention synthesis slag bulk difference from prior art is in that:
The raw material overwhelming majority that high-performance of the present invention synthesis slag bulk adopts is the waste material produced in commercial production; granulated blast-furnace slag is the steelmaking wastes that originally cannot utilize or be difficult with; successfully reach twice laid, reduce the excellent results of landfill waste；The quartz sand that the present invention uses is the waste material being not used to making glass that quartz sand factory produces, and has successfully reached twice laid, the excellent results of protection environment；Present invention uses the three grades of flyash of country being presently believed to be waste material.Drastically increase the utilization rate of flyash, decrease and process a series of environment negative effects that this type of flyash produces, successfully reached twice laid, reduce the excellent results of environmental pollution.Waste rock wool now belongs to recovery article, it does not have acquisition cost, it is only necessary to about 5 yuan/ton of expense of shipping, with low cost, has reached the effect turned waste into wealth.
Need time traditional handicraft makes slag to add basalt and dolomite as adjuvant.Basalt is a kind of base effusive rock, mainly can at deep-sea oceanic ridge, archipelago in ocean basin, and active continental margin and inland fissure eruption mouth are exploited, and exploitation difficulty is big, belongs to mineral resources.DOLOMITE CRYSTALS belongs to the carbonate mineral of trigonal system, dolomite is present in crystalline limestone and other is rich in the metamorphic rock of magnesium, part originates in the hole of hydrothermal solution mineral ore and In Carbonate Rock, once in a while as the cement of various sedimentary rocks, for a kind of rock-forming mineral modal in carbonate rock.Massif environment can be caused and have a strong impact on by exploitation dolomite, destroys natural environment, and cost of winning is of a relatively high, causes that use cost improves.Country has ordered to forbid dolomite and basaltic private are dug and has disorderly adopted simultaneously, causes that the price of both Ores improves further.Use product high-performance of the present invention synthesis slag bulk; basalt and dolomite then need not be added as adjuvant when making mineral wool; can effectively reduce the use of mineral, while reducing cost, reduce the exploitation to mineral, thus having reached the excellent results of protection environment.Using product high-performance of the present invention synthesis slag bulk to make in the process of mineral wool can make coke make consumption reduce about 15%-20%, thus it is poisonous with some greatly to reduce greenhouse gases, and the discharge of dusty gas.Life-time service can reduce insulation material significantly and produce the pollution to environment.
Additionally, the product of the present invention also has the advantage that
(1) refractoriness is controlled, by the proportioning of the various raw material of product is regulated and controled, it is possible to reaches to control the effect of refractoriness, uses the mineral wool that production of the present invention goes out can reach, between refractoriness 1100 DEG C-1500 DEG C, fully to meet industrialization production requirement.
(2) chemical composition proportioning is controlled, and mineral wool feedstock acidity coefficient can regulate to 1.2-1.3 in factory, produces the mineral wool of high-quality when not increasing oxygen enrichment.
(3) product block footpath is controlled, reduces the raw material excessive, too small in use procedure and powder planar composition, and in Cupola, the permeability of air-flow produces wholesome effect.
(4) product density is controlled, can select the raw material of different densities according to coke composition and calorific value, it is simple to the position of maintenance melting band in process of production.
Below in conjunction with specific embodiment, the high-performance of the present invention is synthesized slag bulk to be described further.
Detailed description of the invention
Embodiment 1
A kind of high-performance synthesis slag bulk, is made up of the material of following mass percent:
Cement: 15%；
Granulated blast-furnace slag: 60%；
Quartz sand: 6%；
Flyash: 9%；
Waste rock wool: 10%；
Wherein, described cement is Portland cement；Described granulated blast-furnace slag is steel plant's grain slag；Described quartz sand is the quartz sand powder or the polishing remaining quartz sand powder of glass that are not suitable for producing glass；Described flyash is three grades of flyash of country.
Described high-performance synthesis slag bulk is column, and its cross section is circle, ellipse, rhombus, hexagon or octagon.
Embodiment 2
A kind of high-performance synthesis slag bulk, is made up of the material of following mass percent:
Cement: 8%；
Granulated blast-furnace slag: 52%；
Quartz sand: 10%；
Flyash: 15%；
Waste rock wool: 15%；
Wherein, described cement is Portland cement；Described granulated blast-furnace slag is steel plant's grain slag；Described quartz sand is the quartz sand powder or the polishing remaining quartz sand powder of glass that are not suitable for producing glass；Described flyash is three grades of flyash of country.
Described high-performance synthesis slag bulk is column, and its cross section is circle, ellipse, rhombus, hexagon or octagon.
Embodiment 3
A kind of high-performance synthesis slag bulk, is made up of the material of following mass percent:
Cement: 13%；
Granulated blast-furnace slag: 45%；
Quartz sand: 15%；
Flyash: 14%；
Waste rock wool: 13%；
Wherein, described cement is Portland cement；Described granulated blast-furnace slag is steel plant's grain slag；Described quartz sand is the quartz sand powder or the polishing remaining quartz sand powder of glass that are not suitable for producing glass；Described flyash is three grades of flyash of country.
Described high-performance synthesis slag bulk is column, and its cross section is circle, ellipse, rhombus, hexagon or octagon.
Embodiment 4
A kind of high-performance synthesis slag bulk, is made up of the material of following mass percent:
Cement: 11%；
Granulated blast-furnace slag: 58%；
Quartz sand: 11%；
Flyash: 6%；
Waste rock wool: 14%.
Wherein, described cement is Portland cement；Described granulated blast-furnace slag is steel plant's grain slag；Described quartz sand is the quartz sand powder or the polishing remaining quartz sand powder of glass that are not suitable for producing glass；Described flyash is three grades of flyash of country.
Described high-performance synthesis slag bulk is column, and its cross section is circle, ellipse, rhombus, hexagon or octagon.
Embodiment 5
The preparation method of a kind of described high-performance synthesis slag bulk, it comprises the steps: granulated blast-furnace slag, quartz sand, flyash and waste rock wool to be proportionally respectively put in four preparation storehouses, and is put in cement bin by Portland cement；Above five kinds of raw materials are put in blender, add water 1-3 minute (the concrete time is depending on the degree of stirring) of stirring of 10%, the raw material stirred is put into compressing formation semi-finished product in non-baking brick machine, described semi-finished product natural drying is obtained product after 1-2 days.
Wherein, in preparation process temperature be more than or equal to 5 DEG C；Described blender is arranged on the inside of described non-baking brick machine, and the stir storehouse of described blender is connected with the raw material cabin of described non-baking brick machine, is integrated；The power of described blender and described non-baking brick machine is 22KW.
The proportioning of the present invention is not limited to the occurrence in embodiment 1～3, at cement: 8%～15%；Granulated blast-furnace slag: 45%～60%；Quartz sand: 6%～15%；Flyash: 6%～15%；Waste rock wool: 10%～15%, all combinations within the scope of this all can reach the purpose of the present invention.The product size of the present invention is the arbitrary dimension being arranged as required to, for instance, it is possible to being cylindrical, its cross section is the circle of diameter 8～12cm, and height is 8～10cm；Can being cylindrical body, its height be 7～10cm, and cross section is the square or hexagon that the length of side is 6～11cm etc. of the length of side 7～9cm.
Having ordered the output of the waste residue (dry slag) forbidding steel plant due to country, caused that the production of mineral wool needs to use granulated blast-furnace slag (grain slag), this production cost that may result in mineral wool increases, and technique complicates.Product of the present invention can produce a kind of high performance synthesis slag bulk with granulated blast-furnace slag, but makes the production technology of mineral wool become simple.The product of the present invention has successfully reached twice laid, and the excellent results of protection environment, it has the advantages such as refractoriness is controlled, chemical composition proportioning is controlled, product block footpath is controlled, product density is controlled.
The output efficiency of preparation method of the present invention:
Every non-baking brick machine is per minute can produce 400 kilograms of shaped articles (before dry in the sun).
The preparation process of product of the present invention has the advantage saving the energy:
Blender and non-baking brick machine power that product of the present invention uses are 22KW, and the ball press power used in traditional handicraft is up to 135KW, and when using output efficiency close, electric power energy is saved more than 6.14 times.
The using method of product of the present invention:
1. the fixed carbon content according to coke, calculates the mixing ratio of product of the present invention and coke.
2. directly add to mix with other raw materials by product of the present invention complete for proportioning and coke and put into use in production stove.
The application of product of the present invention:
Product of the present invention is put in industrialized production by Langfang City Dacheng County, Hebei province Tai Yue insulation material factory with Langfang City Dacheng County, Hebei province Qi Yuan insulation material factory, and properties of product are consistent with analyzing above completely with attribute.This product has reached Expected Results and commercial production standard.
Embodiment described above is only that the preferred embodiment of the present invention is described; not the scope of the present invention is defined; under the premise designing spirit without departing from the present invention; various deformation that technical scheme is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that claims of the present invention is determined.
Claims (10)
1. a high-performance synthesis slag bulk, it is characterised in that: it is made up of the material of following mass percent:
Cement: 8%～15%；
Granulated blast-furnace slag: 45%～60%；
Quartz sand: 6%～15%；
Flyash: 6%～15%；
Waste rock wool: 10%～15%.
2. high-performance according to claim 1 synthesis slag bulk, it is characterised in that: described cement is Portland cement.
3. high-performance according to claim 2 synthesis slag bulk, it is characterised in that: described granulated blast-furnace slag is steel plant's grain slag.
4. high-performance according to claim 3 synthesis slag bulk, it is characterised in that: described quartz sand is the quartz sand powder or the polishing remaining quartz sand powder of glass that are not suitable for producing glass.
5. high-performance according to claim 4 synthesis slag bulk, it is characterised in that: described flyash is three grades of flyash of country.
6. high-performance according to claim 5 synthesis slag bulk, it is characterised in that: the one in following four:
(1) described high-performance synthesis slag bulk is made up of the material of following mass percent:
Cement: 15%；
Granulated blast-furnace slag: 60%；
Quartz sand: 6%；
Flyash: 9%；
Waste rock wool: 10%；
(2) described high-performance synthesis slag bulk is made up of the material of following mass percent:
Cement: 8%；
Granulated blast-furnace slag: 52%；
Quartz sand: 10%；
Flyash: 15%；
Waste rock wool: 15%；
(3) described high-performance synthesis slag bulk is made up of the material of following mass percent:
Cement: 13%；
Granulated blast-furnace slag: 45%；
Quartz sand: 15%；
Flyash: 14%；
Waste rock wool: 13%；
(4) described high-performance synthesis slag bulk is made up of the material of following mass percent:
Cement: 11%；
Granulated blast-furnace slag: 58%；
Quartz sand: 11%；
Flyash: 6%；
Waste rock wool: 14%.
7. high-performance according to claim 1 synthesis slag bulk, it is characterised in that: for column, its cross section is circle, ellipse, rhombus, hexagon or octagon.
8. in a claim 1-7 described in any one high-performance synthesis slag bulk preparation method; it is characterized in that: comprise the steps: granulated blast-furnace slag, quartz sand, flyash and waste rock wool to be proportionally respectively put in four preparation storehouses, and Portland cement is put in cement bin；Putting in blender by above five kinds of raw materials, the water adding 10% stirs 1-3 minute, and the raw material stirred is put into compressing formation semi-finished product in non-baking brick machine, and described semi-finished product natural drying is obtained product after 1-2 days.
9. the preparation method of high-performance according to claim 8 synthesis slag bulk, it is characterised in that: in preparation process, temperature is be more than or equal to 5 DEG C.
10. the preparation method of high-performance according to claim 9 synthesis slag bulk, it is characterised in that: described blender is arranged on the inside of described non-baking brick machine, and the stir storehouse of described blender is connected with the raw material cabin of described non-baking brick machine；The power of described blender and described non-baking brick machine is 22KW.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111253140A (en) * | 2018-11-30 | 2020-06-09 | 华能中天节能科技集团有限责任公司 | Waste cotton residue block and preparation method thereof |
| CN112225508A (en) * | 2020-10-20 | 2021-01-15 | 上海握算实业有限公司 | Rock wool waste regenerated cement foam board and preparation method thereof |
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| CN111253140B (en) * | 2018-11-30 | 2022-04-19 | 华能中天节能科技集团有限责任公司 | Waste cotton residue block and preparation method thereof |
| CN112225508A (en) * | 2020-10-20 | 2021-01-15 | 上海握算实业有限公司 | Rock wool waste regenerated cement foam board and preparation method thereof |
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| CN105777002B (en) | 2018-03-30 |
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