CN105859162B - A kind of method for leaching slag fine powder granulation and preparing sound-absorbing material - Google Patents
A kind of method for leaching slag fine powder granulation and preparing sound-absorbing material Download PDFInfo
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- CN105859162B CN105859162B CN201510026005.6A CN201510026005A CN105859162B CN 105859162 B CN105859162 B CN 105859162B CN 201510026005 A CN201510026005 A CN 201510026005A CN 105859162 B CN105859162 B CN 105859162B
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Abstract
The present invention relates to a kind of method for leaching slag fine powder granulation and preparing sound-absorbing material, it is characterized in that using the slag of steelmaking process discharge as raw material, Selectively leaching is realized to the calcium and magnesium component in slag by multiphase double solvents first, slag will be leached again wearing into fine-powdered and being mixed with cement and aqueous slkali and be granulated, resulting materials are sound-absorbing material coarse aggregate.This coarse aggregate and binding agent, early strength agent, dispersant and water are mixed and repressed shaping, maintenance, drying finally give sound-absorbing material.The acoustic absorptivity for the sound-absorbing material that this method makes is up to more than 0.59, and compression strength is up to more than 5.5MPa.The present invention provides a kind of effective utilization ways for slag, and it has the advantages that, and prepared sound-absorbing material density is small, technological process energy consumption is low, slag added value increases, and has preferable environmental benefit and economic benefit.
Description
Technical field
The invention belongs to solid waste resource recovery to utilize field, is related to the utilization of slag and the making of sound-absorbing material is matched somebody with somebody
Side and technique.
Background technology
Slag is the slag discharged in steelmaking process, is the accessory substance of steelmaking process.The composition of slag is more complicated, with
Raw material, make steel the difference of mode, production phase, steel grade and heat etc. and change.In general, slag be by Ca, Fe, Si,
The oxides such as Mg, Al, Mn, P form, and its primary chemical composition is CaO, SiO2、Al2O3、FeO、Fe2O3、MgO、MnO、P2O5, have
A little slags also contain V2O5、TiO2.The main mineral composition of slag is calcium and magnesium rhodonite (3CaORO2SiO2), calcium and magnesium olive
Olive stone (CaOMgOSiO2), tricalcium silicate (3CaOSiO2), dicalcium silicate (2CaOSiO2), dicalcium ferrite (2CaO
Fe2O3), RO (R represents Mg, Fe, Mn, the solid solution that RO MgO, FeO, MnO are formed) etc., also part fluor-apatite (9CaO
3P2O5·CaF2), free lime (f-CaO) etc..The mineral composition of slag depends mainly on its chemical composition, particularly with its alkali
Spend relevant.According to statistics, about 180 kilograms of slag can all be discharged by often producing 1 ton of crude steel.At present, China has accumulated slag 300,000,000
Ton, common more than 10,000 mus of land occupation, the slag not only appropriation of land, and it produces alkali during storage because of weathering of flood tide
Property dust, the environment around serious pollution.
At present, worldwide it is divided into following a few classes using the main path of slag：
1. produce slag cement：Levigate rear obtained slag cement will be mixed together after slag crushing with other admixtures.
2. concrete batching：Applied using ground steel slag admixture substitution part of cement in concrete.
3. it is used as cement admixture：Substitute Iron Ore Powder and part lime stone is used for the admixture of manufacture of cement.
4. produce steel slag brick and building block：Slag is mixed with binding agent, exciting agent according to certain proportioning, and passed through necessarily
Process route is made, and its quality can reach the standard of unselected clay fired brick.
5. it is used as foundation material：Used simultaneously with building stones, native horsestone etc., through being compacted as foundation material use.
Although the utilization ways of slag are a lot, the exploitation and application of Comprehensive Utilization of Steel Slag technology also achieve certain achievement.
But in general, the utilization rate of China's slag is not also high, many restraining factors using slag reliablely and stablely also be present.Example
When such as by the use of slag production cement or as cement admixture, because slag contains a large amount of free calcium oxides, this can deposit product
Volume stability is bad the problem of.And fail to make full use of the latent of slag with slag concrete batching or as foundation material
It is being worth, and economic benefit is little.
Report of the prepared from steel slag for sound-absorbing material is related at present, in application publication number be the A of CN 101696092 and application is public
Cloth number is in the B of CN 101695850 patent application, discloses a kind of method of prepared from steel slag for sound-absorbing material.This method is present
The defects of one be to use undressed slag, hidden danger in terms of volume stability be present in prepared sound absorption building block；Second, its
Sound absorption building block directly is prepared by aggregate of slag, the unit weight of gained building block is in 1.300gcm-3More than, density is larger, it is difficult to
As Lightweight acoustical materials'use；Third, the preparation of its sound-absorbing material needs 1100 DEG C of high-temperature calcination 1-6h, a large amount of heat energy are expended.
Research on steel scoria unburned brick also has some reports, open in the patent specification of Application No. 200810014015.8
A kind of that non-burning brick method is produced as raw material using Steel-slag Sand and steel-making slag powder, it mixes Steel-slag Sand, steel-making slag powder, blast furnace slag and lime
Close, sized mixing with water, after compressing under pressure and natural curing, be aged in autoclave under 0.1-2.0MPa pressure
3-48 hours obtain steel scoria unburned brick.Need to carry out in autoclave during the method ageing of above-mentioned production steel scoria unburned brick, pair set
Standby to require higher, equipment investment cost is high.In addition, the steel scoria unburned brick of its production is common bearing bricks, not there is spy
Different use function, therefore its added economic value is smaller.The application publication number that this seminar proposes is the A of CN 101134155
Patent application propose a kind of method for the fixed carbon dioxide cogeneration carbonate that is carbonated using slag, this method is by slag
Carbon sequestration element optionally leach and the calcium ion in leachate be changed into a kind of aragonite calcium carbonate product, and this patent
The shortcomings that be leach after slag fail to make full use of, generate a large amount of solid waste again.
The content of the invention
It is an object of the invention to provide a kind of Processes For Effective Conversion of solid waste slag, for above-mentioned steel slag brick volume
Stability is bad, density is larger, energy consumption is high, added value is relatively low and prepared from steel slag is underused for residue during carbonate
Defect proposes a solution and makes improvement.Both the comprehensive utilization of slag had been promoted, its environmental problem brought has been alleviated, also creates
A kind of method for preparing the sound-absorbing material with excellent sound absorption performance has been made, has improved the surcharge of slag.
The present invention is used as binding agent to leach slag as raw material using cement.The preparation technology flow of the sound-absorbing material is for example attached
Shown in Fig. 1.Specific steps are described below：
I slag Selectively leachings
(1) a kind of organic acid and a kind of organic solvent are mixed, obtain organic phase, water is added into described organic phase,
Obtain multiphase composite solution；
(2) the multiphase composite solution that step (1) obtains is impregnated into slag 30-150min at a temperature of 30-100 DEG C, filtered
Solid residue is obtained, by residual washing-out 3 times and is dried with water；
II leaches slag fine powder and is granulated
(3) the leaching slag obtained using step (2) is raw material, with planetary ball mill by its ball milling 1h, with square hole screen pair
Above-mentioned slag is sieved, and obtains particle diameter 0.048-0.380mm slag fine powder；
(4) slag fine powder 30-60 parts that step (3) obtains are taken, Portland cement 5-40 parts, are well mixed, upwards
The sodium hydrate aqueous solution 5-40 parts for adding that mass fraction concentration is 3-6% in well mixed material are stated, stirs and infiltrates
20min；
(5) slurry for obtaining step (4) is compressing under 1.0-3.5MPa, dwell time 10min；
(6) in temperature it is 10-40 DEG C after the sample demoulding obtained step (5), relative humidity is 70-100% constant temperature
2d is conserved in constant humidity cabinet, the sample for conserving completion is placed in baking oven 8h is dried at a temperature of 80-100 DEG C；
It is prepared by III sound-absorbing materials
(7) drying sample that step (6) obtains is crushed with disintegrating machine, screening obtains particle diameter 0.38-4.00mm's
Coarse aggregate；
(8) coarse aggregate 50-80 parts that step (7) obtains are taken, add Portland cement 5-30 parts, add cement quality
2-6% early strength agent and cement quality 1-3% dispersant, water 10-40 parts are added after being well mixed, stir 20min；
(9) slurry for obtaining step (8) is compressing under 1.0-5.0MPa pressure, dwell time 10min；
(10) in temperature it is 10-40 DEG C after the sample demoulding obtained step (9), relative humidity is 70-100% constant temperature
2d is conserved in constant humidity cabinet, the sample for conserving completion is placed in baking oven 8h is dried at a temperature of 80-100 DEG C, obtains sound-absorbing material.
Preferably, in the step (1) organic acid in oxalic acid, acetic acid, propionic acid, lactic acid, citric acid and butyric acid one
Kind or several, one or more of the organic solvent in n-octyl alcohol, benzene, toluene, tributyl phosphate and trioctylphosphine oxygen phosphorus.
Preferably, the volume ratio of organic phase and aqueous phase is 0.5-5 in the step (1):1.
Preferably, concentration of the organic acid in organic phase is 0.5-2molL in the step (1)-1。
Preferably, the mass ratio of slag and organic acid is 0.5-5 in the step (2):1.
Preferably, slag fine powder particle diameter is 0.048-0.380mm in the step (3).
Preferably, slag fine powder 30-60 parts used in being granulated in the step (4), Portland cement 5-40 parts, hydrogen-oxygen
Change sodium water solution 5-40 parts, sodium hydrate aqueous solution concentration 3-6%.
Preferably, pressure used in shaping is 1.0-3.5MPa when being granulated in the step (5).
Preferably, when being granulated in the step (6) curing temperature be 10-40 DEG C, relative humidity 70-100%, conserved
It it is 80-100 DEG C into rear drying temperature.
Preferably, coarse aggregate size 0.38-4.00mm in the step (7).
Preferably, sound-absorbing material formula is specially in the step (8)：Coarse aggregate 50-80 parts, Portland cement 5-
30 parts, early strength agent is the 2-6% of cement quality, and dispersant is the 1-3% of cement quality.
Preferably, early strength agent is one kind or several in triethanolamine, calcium formate and triisopropanolamine in the step (8)
Kind, dispersant is the one or more in sodium tripolyphosphate, calgon and sodium pyrophosphate.
Preferably, sound-absorbing material typed pressure is 1.0-5.0MPa in the step (9).
Preferably, in the step (10) sound-absorbing material curing temperature be 10-40 DEG C, relative humidity 70-100%, inhale
Sound material drying temperature is 80-100 DEG C.
The present invention provides a kind of effective utilization ways for slag, existing body when solving prepared from steel slag for sound-absorbing material
Stability is bad for product, density is big, high energy consumption, added value is low and prepared from steel slag does not fill for the residue after Selectively leaching during carbonate
Divide the problems such as utilizing.One of features of the present invention is to pre-process slag, using more containing organic acid and organic solvent
Phase composite solution carries out Selectively leaching to slag, removes a part of free calcium oxide therein, fundamentally controls free
The problem of volume stability is bad caused by calcium oxide.Another feature of the present invention is that slag fine powder is granulated and does sound-absorbing material bone
Material, this process reduces the density of coarse aggregate, so as to reduce the unit weight of sound-absorbing material, to reach wanting for sound-absorbing material lightweight
Ask and provide possibility.The application publication number that the 3rd feature of the present invention is to solve the proposition of this seminar is CN
The problem of prepared from steel slag utilizes for residue after carbonate in 101134155 A patent application.The present invention both promotes Industrial Solid Waste
The comprehensive utilization of slag, reduce its problem of environmental pollution brought, it was also proposed that a kind of to prepare excellent Lightweight acoustical material
Method, the surcharge of slag is improved, there is certain economic benefit and preferable prospects for commercial application.
Brief description of the drawings
Fig. 1 is the process chart of the present invention.
Embodiment
Patent of the present invention is further illustrated with reference to embodiment.
Embodiment 1.
Main component is in the slag selected in the present embodiment：~45%CaO ,~10%MgO ,~20%SiO2,~
20%FeO and~5% other impurities, specific embodiment are as follows：
I slag Selectively leachings
(1) 70mL oxalic acid and 730mL n-octyl alcohols are mixed, obtains organic phase, 800mL is added into described organic phase
Water, obtain multiphase composite solution；
(2) slag 150g is added in the multiphase composite solution obtained to step (1), impregnates 150min, mistake at a temperature of 60 DEG C
Filter obtains solid residue, by residual washing-out 3 times and is dried with water；
II leaches slag fine powder and is granulated
(3) the leaching slag obtained using step (2) is raw material, with planetary ball mill by its ball milling 1h, with square hole screen pair
Above-mentioned slag is sieved, and obtains particle diameter 0.074-0.150mm slag fine powder；
(4) slag fine powder 400g, the Portland cement 400g that step (3) obtains are taken, is well mixed, to above-mentioned mixing
The sodium hydrate aqueous solution 200g that mass fraction is 3% is added in uniform material, stirs and infiltrates 20min；
(5) slurry for obtaining step (4) is compressing under 2.0MPa, dwell time 10min；
(6) in temperature it is 20 DEG C after the sample demoulding obtained step (5), relative humidity is 100% climatic chamber
Middle maintenance 2d, the sample for conserving completion are placed in baking oven and dry 8h at a temperature of 100 DEG C；
It is prepared by III sound-absorbing materials
(7) drying sample that step (6) obtains is crushed with disintegrating machine, screening obtains the thick of particle diameter 1.0-1.7mm
Aggregate；
(8) the coarse aggregate 300g for taking step (7) to obtain, add Portland cement 100g, add triethanolamine 2g and
Calgon 1g, water 100g is added after being well mixed, stirs 20min；
(9) slurry for obtaining step (8) is compressing under 3.0MPa pressure, dwell time 10min；
(10) in temperature it is 20 DEG C after the sample demoulding obtained step (9), relative humidity is 100% climatic chamber
Middle maintenance 2d, the sample for conserving completion are placed in baking oven and dry 8h at a temperature of 100 DEG C, obtain sound-absorbing material.
Using the acoustic absorptivity of standing-wave-tube method measure sound-absorbing material, the basic parameter and testing sound absorption performance result of sample are such as
Table 1, table 2.
The sample basic parameter of 1 embodiment of table one
| Sample number into spectrum | Quality/g | Diameter/cm | Thickness/cm | Unit weight/gcm-3 | Compression strength/MPa |
| Sample 1 | 450 | 9.80 | 4.59 | 1.3009 | 4.5 |
The sample sound absorbing capabilities of 2 embodiment of table one
Embodiment 2.
Main component is in the slag selected in the present embodiment：~45%CaO ,~10%MgO ,~20%SiO2,~
20%FeO and~5% other impurities, specific embodiment are as follows：
I slag Selectively leachings
(1) 70mL oxalic acid and 730mL n-octyl alcohols are mixed, obtains organic phase, 800mL is added into described organic phase
Water, obtain multiphase composite solution；
(2) slag 150g is added in the multiphase composite solution obtained to step (1), impregnates 150min, mistake at a temperature of 70 DEG C
Filter obtains solid residue, by residual washing-out 3 times and is dried with water；
II leaches slag fine powder and is granulated
(3) the leaching slag obtained using step (2) is raw material, with planetary ball mill by its ball milling 1h, with square hole screen pair
Above-mentioned slag is sieved, and obtains particle diameter 0.048-0.074mm slag fine powder；
(4) slag fine powder 450g, the Portland cement 350g that step (3) obtains are taken, is well mixed, to above-mentioned mixing
The sodium hydrate aqueous solution 200g that mass fraction is 3% is added in uniform material, stirs and infiltrates 20min；
(5) slurry for obtaining step (4) is compressing under 2.0MPa, dwell time 10min；
(6) in temperature it is 20 DEG C after the sample demoulding obtained step (5), relative humidity is 100% climatic chamber
Middle maintenance 2d, the sample for conserving completion are placed in baking oven and dry 8h at a temperature of 100 DEG C；
It is prepared by III sound-absorbing materials
(7) sample for the drying for obtaining step (6) is crushed with disintegrating machine, and screening obtains particle diameter 1.0-2.8mm's
Coarse aggregate；
(8) the coarse aggregate 300g for taking step (7) to obtain, add Portland cement 100g, add triethanolamine 2g and
Calgon 1g, water 100g is added after being well mixed, stirs 20min；
(9) slurry for obtaining step (8) is compressing under 3.5MPa pressure, dwell time 10min；
(10) in temperature it is 20 DEG C after the sample demoulding obtained step (9), relative humidity is 100% climatic chamber
Middle maintenance 2d, the sample for conserving completion are placed in baking oven and dry 8h at a temperature of 100 DEG C, obtain sound-absorbing material.
Using the acoustic absorptivity of standing-wave-tube method measure sound-absorbing material, the basic parameter and testing sound absorption performance result of sample are such as
Table 3, table 4.
The sample basic parameter of 3 embodiment of table two
| Sample number into spectrum | Quality/g | Diameter/cm | Thickness/cm | Unit weight/gcm-3 | Compression strength/MPa |
| Sample 2 | 463 | 9.80 | 4.62 | 1.3276 | 4.3 |
The sample sound absorbing capabilities of 4 embodiment of table two
Embodiment 3.
Main component is in the slag selected in the present embodiment：~45%CaO ,~10%MgO ,~20%SiO2,~
20%FeO and~5% other impurities, specific embodiment are as follows：
I slag Selectively leachings
(1) 70mL oxalic acid and 730mL n-octyl alcohols are mixed, obtains organic phase, 800mL is added into described organic phase
Water, obtain multiphase composite solution；
(2) slag 150g is added in the multiphase composite solution obtained to step (1), impregnates 150min, mistake at a temperature of 80 DEG C
Filter obtains solid residue, by residual washing-out 3 times and is dried with water；
II leaches slag fine powder and is granulated
(3) the leaching slag obtained using step (2) is raw material, with planetary ball mill by its ball milling 1h, with square hole screen pair
Above-mentioned slag is sieved, and obtains particle diameter 0.048-0.74mm slag fine powder；
(4) slag fine powder 500g, the Portland cement 300g that step (3) obtains are taken, is well mixed, to above-mentioned mixing
The sodium hydrate aqueous solution 200g that mass fraction is 3% is added in uniform material, stirs and infiltrates 20min；
(5) slurry for obtaining step (4) is compressing under 2.0MPa, dwell time 10min；
(6) in temperature it is 20 DEG C after the sample demoulding obtained step (5), relative humidity is 100% climatic chamber
Middle maintenance 2d, the sample for conserving completion are placed in baking oven and dry 8h at a temperature of 100 DEG C；
It is prepared by III sound-absorbing materials
(7) drying sample that step (6) obtains is crushed with disintegrating machine, screening obtains the thick of particle diameter 1.0-1.7mm
Aggregate；
(8) the coarse aggregate 350g for taking step (7) to obtain, Portland cement 50g is added, adds triethanolamine 1g and six
Sodium metaphosphate 0.5g, water 100g is added after being well mixed, stirs 20min；
(9) slurry for obtaining step (8) is compressing under 3.0MPa pressure, dwell time 10min；
(10) in temperature it is 20 DEG C after the sample demoulding obtained step (9), relative humidity is 100% climatic chamber
Middle maintenance 2d, the sample for conserving completion are placed in baking oven and dry 8h at a temperature of 100 DEG C, obtain sound-absorbing material.
Using the acoustic absorptivity of standing-wave-tube method measure sound-absorbing material, the basic parameter and testing sound absorption performance result of sample are such as
Table 5, table 6.
The sample basic parameter of 5 embodiment of table three
| Sample number into spectrum | Quality/g | Diameter/cm | Thickness/cm | Unit weight/gcm-3 | Compression strength/MPa |
| Sample 3 | 473 | 9.80 | 4.71 | 1.3305 | 4.3 |
The sample sound absorbing capabilities of 6 embodiment of table three
Embodiment 4.
Main component is in the slag selected in the present embodiment：~45%CaO ,~10%MgO ,~20%SiO2,~
20%FeO and~5% other impurities, specific embodiment are as follows：
I slag Selectively leachings
(1) 50mL oxalic acid and 750mL n-octyl alcohols are mixed, obtains organic phase, 1000mL is added into described organic phase
Water, obtain multiphase composite solution；
(2) slag 200g is added in the multiphase composite solution obtained to step (1), impregnates 120min, mistake at a temperature of 90 DEG C
Filter obtains solid residue, by residual washing-out 3 times and is dried with water；
II leaches slag fine powder and is granulated
(3) the leaching slag obtained using step (2) is raw material, with planetary ball mill by its ball milling 1h, with square hole screen pair
Above-mentioned slag is sieved, and obtains particle diameter 0.074-0.150mm slag fine powder；
(4) slag fine powder 550g, the Portland cement 300g that step (3) obtains are taken, is well mixed, to above-mentioned mixing
The sodium hydrate aqueous solution 150g that mass fraction is 5% is added in uniform material, stirs and infiltrates 20min；
(5) slurry for obtaining step (4) is compressing under 2.5MPa, dwell time 10min；
(6) in temperature it is 25 DEG C after the sample demoulding obtained step (5), relative humidity is in 90% climatic chamber
2d is conserved, the sample for conserving completion is placed in baking oven and dries 8h at a temperature of 100 DEG C；
It is prepared by III sound-absorbing materials
(7) drying sample that step (6) obtains is crushed with disintegrating machine, screening obtains the thick of particle diameter 1.7-2.8mm
Aggregate；
(8) the coarse aggregate 350g for taking step (7) to obtain, add Portland cement 50g, add triethanolamine 1.5g and
Calgon 1g, water 100g is added after being well mixed, stirs 20min；
(9) slurry for obtaining step (8) is compressing under 4.0MPa pressure, dwell time 10min；
(10) in temperature it is 25 DEG C after the sample demoulding obtained step (9), relative humidity is 90% climatic chamber
Middle maintenance 2d, the sample for conserving completion are placed in baking oven and dry 8h at a temperature of 100 DEG C, obtain sound-absorbing material.
Using the acoustic absorptivity of standing-wave-tube method measure sound-absorbing material, the basic parameter and testing sound absorption performance result of sample are such as
Table 7, table 8.
The example IV sample basic parameter of table 7
| Sample number into spectrum | Quality/g | Diameter/cm | Thickness/cm | Unit weight/gcm-3 | Compression strength/MPa |
| Sample 4 | 469 | 9.80 | 4.85 | 1.2825 | 5.1 |
The example IV sample sound absorbing capabilities of table 8
Embodiment 5.
Main component is in the slag selected in the present embodiment：~45%CaO ,~10%MgO ,~20%SiO2 ,~
20%FeO and~5% other impurities, specific embodiment are as follows：
I slag Selectively leachings
(1) 50mL oxalic acid and 750mL n-octyl alcohols are mixed, obtains organic phase, 1000mL is added into described organic phase
Water, obtain multiphase composite solution；
(2) slag 200g is added in the multiphase composite solution obtained to step (1), impregnates 90min at a temperature of 90 DEG C, is filtered
Solid residue is obtained, by residual washing-out 3 times and is dried with water；
II leaches slag fine powder and is granulated
(3) the leaching slag obtained using step (2) is raw material, with planetary ball mill by its ball milling 1h, with square hole screen pair
Above-mentioned slag is sieved, and obtains particle diameter 0.074-0.150mm slag fine powder；
(4) slag fine powder 550g, the Portland cement 300g that step (3) obtains are taken, is well mixed, to above-mentioned mixing
The sodium hydrate aqueous solution 150g that mass fraction is 5% is added in uniform material, stirs and infiltrates 20min；
(5) slurry for obtaining step (4) is compressing under 3.0MPa, dwell time 10min；
(6) in temperature it is 25 DEG C after the sample demoulding obtained step (5), relative humidity is in 95% climatic chamber
2d is conserved, the sample for conserving completion is placed in baking oven and dries 8h at a temperature of 100 DEG C；
It is prepared by III sound-absorbing materials
(7) drying sample that step (6) obtains is crushed with disintegrating machine, screening obtains the thick of particle diameter 1.4-2.4mm
Aggregate；
(8) the coarse aggregate 330g for taking step (7) to obtain, add Portland cement 70g, add triethanolamine 2.1g and
Calgon 2.1g, water 100g is added after being well mixed, stirs 20min；
(9) slurry for obtaining step (8) is compressing under 4.5MPa pressure, dwell time 10min；
(10) in temperature it is 25 DEG C after the sample demoulding obtained step (9), relative humidity is 95% climatic chamber
Middle maintenance 2d, the sample for conserving completion are placed in baking oven and dry 8h at a temperature of 100 DEG C, obtain sound-absorbing material.
Using the acoustic absorptivity of standing-wave-tube method measure sound-absorbing material, the basic parameter and testing sound absorption performance result of sample are such as
Table 9, table 10.
The sample basic parameter of 9 embodiment of table five
| Sample number into spectrum | Quality/g | Diameter/cm | Thickness/cm | Unit weight/gcm-3 | Compression strength/MPa |
| Sample 5 | 456 | 9.80 | 4.81 | 1.2568 | 5.5 |
The sample sound absorbing capabilities of 10 embodiment of table five
Claims (5)
- A kind of 1. method for leaching slag fine powder granulation and preparing sound-absorbing material, it is characterised in that:I slag Selectively leaching(1) a kind of organic acid and a kind of organic solvent are mixed, obtains organic phase, add water into described organic phase, obtain Multiphase composite solution；(2) the multiphase composite solution that step (1) obtains is impregnated into slag 30-150min at a temperature of 30-100 DEG C, be filtrated to get Solid residue, by residual washing-out 3 times and dried with water；II, which leaches slag fine powder, is granulated(3) the leaching slag obtained using step (2) is raw material, with planetary ball mill by its ball milling 1h, with square hole screen to above-mentioned Slag is sieved, and obtains particle diameter 0.048-0.380mm slag fine powder；(4) slag fine powder 30-60 parts that step (3) obtains are taken, in terms of mass fraction, Portland cement 5-40 parts, mixing Uniformly, sodium hydrate aqueous solution 5-40 parts that mass fraction concentration is 3-6%, stirring are added into above-mentioned well mixed material And infiltrate 20min；(5) slurry for obtaining step (4) is compressing under 1.0-3.5MPa, dwell time 10min；(6) in temperature it is 10-40 DEG C after the sample demoulding obtained step (5), relative humidity is 70-100% constant temperature and humidity 2d is conserved in case, the sample for conserving completion is placed in baking oven 8h is dried at a temperature of 80-100 DEG C；It is prepared by III sound-absorbing material(7) drying sample that step (6) obtains is crushed with disintegrating machine, screening obtains particle diameter 0.38-4.00mm thick bone Material；(8) coarse aggregate 50-80 parts that step (7) obtains are taken, add Portland cement 5-30 parts, add cement quality 2- 6% early strength agent and cement quality 1-3% dispersant, water 10-40 parts are added after being well mixed, stir 20min；(9) slurry for obtaining step (8) is compressing under 1.0-5.0MPa pressure, dwell time 10min；(10) in temperature it is 10-40 DEG C after the sample demoulding obtained step (9), relative humidity is 70-100% constant temperature and humidity 2d is conserved in case, the sample for conserving completion is placed in baking oven 8h is dried at a temperature of 80-100 DEG C, obtains sound-absorbing material.
- 2. a kind of method for leaching slag fine powder granulation and preparing sound-absorbing material as claimed in claim 1, it is characterised in that described One or more of the organic acid in oxalic acid, acetic acid, propionic acid, lactic acid, citric acid and butyric acid in step (1), organic solvent choosing One or more from n-octyl alcohol, benzene, toluene, tributylphosphate and trioctylphosphine oxygen phosphorus.
- 3. a kind of method for leaching slag fine powder granulation and preparing sound-absorbing material as claimed in claim 1, it is characterised in that described The volume ratio of organic phase and aqueous phase is 0.5-5 in step (1)：1.
- 4. a kind of method for leaching slag fine powder granulation and preparing sound-absorbing material as claimed in claim 1, it is characterised in that described Concentration of the organic acid in organic phase is 0.5-2molL in step (1)-1。
- 5. a kind of method for leaching slag fine powder granulation and preparing sound-absorbing material as claimed in claim 1, it is characterised in that described Early strength agent is the one or more in triethanolamine, calcium formate and triisopropanolamine in step (8), and dispersant is tripolyphosphate One or more in sodium, calgon and sodium pyrophosphate.
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| CN110228960B (en) * | 2019-05-24 | 2021-06-25 | 东南大学 | Steel slag powder activating-digesting agent, steel slag powder modifying method and application |
| CN113601694A (en) * | 2021-07-08 | 2021-11-05 | 江西联达冶金有限公司 | System for preparing steel slag baked brick |
| CN113501672A (en) * | 2021-08-07 | 2021-10-15 | 山东欣润同创环保科技有限公司 | Fatifacient steel slag micro powder particle and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08245244A (en) * | 1995-03-10 | 1996-09-24 | Topy Ind Ltd | Slag killing material for steel making |
| CN101696092A (en) * | 2009-10-19 | 2010-04-21 | 北京科技大学 | Method for manufacturing porous sound absorption material by using blast furnace water quenching slag |
| CN103147520A (en) * | 2013-03-13 | 2013-06-12 | 南昌航空大学 | Method for fabricating light sound absorption and insulation core board with waste slag powder modified micro-foam grains |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08245244A (en) * | 1995-03-10 | 1996-09-24 | Topy Ind Ltd | Slag killing material for steel making |
| CN101696092A (en) * | 2009-10-19 | 2010-04-21 | 北京科技大学 | Method for manufacturing porous sound absorption material by using blast furnace water quenching slag |
| CN103147520A (en) * | 2013-03-13 | 2013-06-12 | 南昌航空大学 | Method for fabricating light sound absorption and insulation core board with waste slag powder modified micro-foam grains |
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