CN101913842A - Baked light-weight environmental-friendly bricks prepared from paper mill sludge and manufacturing method thereof - Google Patents
Baked light-weight environmental-friendly bricks prepared from paper mill sludge and manufacturing method thereof Download PDFInfo
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- CN101913842A CN101913842A CN2010102344922A CN201010234492A CN101913842A CN 101913842 A CN101913842 A CN 101913842A CN 2010102344922 A CN2010102344922 A CN 2010102344922A CN 201010234492 A CN201010234492 A CN 201010234492A CN 101913842 A CN101913842 A CN 101913842A
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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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention relates to baked light-weight environmental-friendly bricks prepared from paper mill sludge and a manufacturing method thereof. The method is characterized by comprising the following steps of: mixing the paper mill sludge, engineering waste sludge, river sludge, refuse ash, slag, ground quick lime, calcium sulfate, sodium carbonate, borax, ferrous sulphate, magnesium sulfate, Li high molecular heavy metal collector, water and the like serving as raw materials, stirring the mixture into a damp product by using a double-shaft mixer and extruding the damp product into a rectangular strip-shaped product by using a de-airing extruder; cutting and molding the extruded product by using a blank cutter; manufacturing paper mill sludge light-weight environmental-friendly bricks under the pressure of between 20 and 30 MPa; feeding the molded and naturally-dried light-weight environmental-friendly bricks into a tunnel kiln by using a battery car to bake the bricks; and obtaining light-weight environmental-friendly brick products after baking. The raw materials can be prepared into hollow bricks and sidewalk bricks with different specifications. The product has the advantages of light weight, high intensity, no pollution, low cost and good benefit.
Description
Technical field
The present invention relates to a kind of baked light-weight environmental-friendly bricks of producing with paper mill sludge, specifically it is with the papermaking sludge discharged, through the dried mud powder after the dehydration, the useless body refuse of engineering, river surge silt, cinder and slag is the baked light-weight environmental-friendly bricks of main material production, belongs to the waste treatment field.
The invention still further relates to the manufacture method of this baked light-weight environmental-friendly bricks.
Background technology
The sanitary sewage of living quarters discharging in paper mill sludge trade effluent that to be the paper mill produce in manufacturing various paper product processes and the factory, adopt physics through sewage work, a kind of blended solid waste of the floating foam gained that sedimentable matter that produces in the chemical process treating processes and sewage surface drift out, the composition of the paper mill sludge equal more complicated of originating, wherein contain a large amount of cadmiums, mercury, plumbous, chromium, arsenic, nickel, zinc, copper, prussiate, pathogenic bacteria, parasitic ovum, heavy metal element and hazardous and noxious substances such as organic pollutant, production and rapid development of economy along with China's paper industry, the quantity of papermaking enterprise increases year by year, scale is increasing, the quantity discharged of the sanitary sewage in paper-making industrial waste water and living quarters is increasing, and the generation of paper mill sludge also increases sharply.The paper mill sludge of a large amount of accumulation not only will take a large amount of soils, and objectionable constituent wherein such as heavy metal; Copper, chromium, arsenic, mercury, cadmium, lead, nickel, zinc etc., pathogenic bacteria, parasitic ovum, organic pollutant and foul smell will become big public hazards that influence urban environmental hygiene, effective treatment technology is all actively being sought by governments at all levels and relevant department, China is to the treatment process of paper mill sludge at present, mainly be to adopt burying method to handle, to reduce pollution to environment.But, the composition more complicated of paper mill sludge, water ratio height, particularly heavy metal, if unprocessed direct landfill, will contaminated soil and groundwater resource, be easy to generate secondary pollution, environment is caused serious harm.Long-term landfill need take a large amount of land resources, how properly scientifically paper mill sludge to be carried out treatment and disposal, make it reach minimizing, stabilization, innoxious and resource utilization, become a big research topic of scientific and technical personnel's extensive concern of China and even whole world environment circle.Current common recognition is exactly that paper mill sludge is effectively utilized as a kind of resource, turns waste into wealth when administering pollution.
Summary of the invention
It is the main material production baked light-weight environmental-friendly bricks for the problem that solves above-mentioned existence with paper mill sludge, the useless body refuse of engineering, river surge silt, cinder and slag that purpose of the present invention provides a kind of just, thereby solved the pollution of paper mill sludge, the useless body refuse of engineering, river surge silt, cinder, slag to environment, also solved the resource regeneration of paper mill sludge, the useless body refuse of engineering, river surge silt, cinder and slag, turn waste into wealth, change evil and be benefit, realized that the resource benign cycle of refuse utilizes.
The present invention also provides the manufacture method of this baked light-weight environmental-friendly bricks.
A kind of baked light-weight environmental-friendly bricks of producing with paper mill sludge, it is made by the following weight proportion raw material;
30～40 parts of paper mill sludge powders
28～38 parts of the useless body refuse powders of engineering
25～35 parts of river surge silt powders
18～28 parts of cinder powders
18～28 parts of slag powders
12～18 parts of unslaked lime powders
3～6 parts of calcium sulfate powders
1～2 part in yellow soda ash
1～2 part of borax
2～3 parts in ferrous sulfate
5～9 parts in sal epsom
0.5～0.8 part of Li high molecular heavy metals trapping agent
15～25 parts in water,
The sanitary sewage of living quarters discharging in described paper mill sludge powder trade effluent that to be the paper mill produce in producing the paper product process and the factory, through a kind of mixed waste of separating after sewage work's processing, through dehydration, deodorizing, disinfection, chelation treatment, drying, after abrasive dust, sorting, make particle diameter again and be powder less than-2mm;
The useless body refuse powder of described engineering is a kind of solid waste of the argillaceous sand stone that discharges in the discarded body refuse that discharges when digging basis and underground parking in the dwelling construction and the urban engineering project, through sorting, fragmentation, pulverizing, screening, drying, make particle diameter again after abrasive dust, the sorting and be powder less than-2mm;
Described river surge silt powder is that all are poured into the useless husky a kind of waste of a large amount of mud that discharges in the row cleaning regulation process by the river of sewage pollution, close processings, drying through dehydration, deodorizing, disinfection, huge legendary turtle, make particle diameter again after abrasive dust, the sorting and be powder less than-2mm;
Described cinder powder is the waste residue of discharging behind the domestic garbage burning electricity generation, remove scrap metal through sorting, pulverizing, magnetic separation after, make particle diameter through abrasive dust, sorting and be powder less than-2mm;
Described slag powder is the waste residue that discharge briquette boiler burning back, remove scrap metal through fragmentation, sorting, pulverizing, magnetic separation after, to make particle diameter be powder less than-2mm for abrasive dust, sorting again.
A kind of manufacture method of the baked light-weight environmental-friendly bricks of producing with paper mill sludge, it is undertaken by following step:
(a) with the paper mill sludge powder of 30～40 weight parts, the engineering of 28～38 weight parts body refuse powder that gives up, the river surge silt powder of 25～35 weight parts, the cinder powder of 18～28 weight parts, the slag powder of 18～28 weight parts, the unslaked lime powder of 12～18 weight parts, the calcium sulfate of 3～6 weight parts, 1～2 weight parts of sodium carbonate, the borax of 1～2 weight part, the ferrous sulfate of 2～3 weight parts, the sal epsom of 5～9 weight parts, 0.5 the Li high molecular heavy metals trapping agent of～0.8 weight part and the water of 15～25 weight parts are raw material, adopt the double-shaft mixing agitator stirring to be moist shape and be squeezed into rectangular stripe shape with de-airing extruder, through the blank cutter excision forming, under the pressure of 20～30Mpa, make the paper mill sludge light-weight environment-friendly adobe of moulding, carry out seasoning
(b) (a) paper mill sludge light-weight environment-friendly adobe after seasoning being sent to tunnel furnace carries out roasting and makes paper mill sludge baked light-weight environmental-friendly bricks product again.
Raw material with the environmental protection brick also can be made into paper mill sludge baked light-weight holllow building block,
Its powder particle diameter of described unslaked lime and calcium sulfate is the powder less than-0.08mm.
It is the main raw material of baked light-weight environmental-friendly bricks that the present invention adopts paper mill sludge, the useless body refuse of engineering, river surge silt, cinder, slag, is that paper mill sludge self contains a large amount of organic substances, can play the incendiary effect.Utilize borax, calcium lime powder for disinfection and calcium sulfate as solidifying agent; utilize cinder and slag to replace coal internal combustion raw material as paper mill sludge sintering environmental protection brick; be because cinder and slag itself contain a certain amount of fixed carbon and volatile matter; be generally 20%～30%; its thermal value is 1300～2500KJ/kg, can burn, and is the castoff regenerative utilization; be save energy, protect environment again.Meet the technical requirements of national energy-saving and emission-reduction, development low-carbon economy.Cause the adobe of paper mill sludge light-weight environment-friendly with the chemical feedstocks of unslaked lime, calcium sulfate, yellow soda ash, borax, the agent of Li high molecular heavy metals trapping is mixed, the rate of drying of adobe is accelerated, performance is good, utilizes tunnel furnace to carry out roasting.With ferrous sulfate is reductive agent, and sal epsom is ferrous retention agent, and the foul smell in the mud is fully decomposed, and reaches rapid de-odorised purpose.
The manufacture method of paper mill sludge baked light-weight environmental-friendly bricks of the present invention, be with carry out disinfection sterilization and adopt the agent of Li high molecular heavy metals trapping that it is carried out chelation treatment of paper mill sludge with borax, calcium lime powder, make paper mill sludge reach the reinforcement chemical stabilization, high-load heavy metal element is captured, generate the huge legendary turtle compound of cross-linked structure, realized the efficient stableization of paper mill sludge.Mixes with the useless body refuse powder of engineering, river surge silt powder, slag powder, cinder powder, calcium sulfate, yellow soda ash, ferrous sulfate, sal epsom and water and to utilize de-airing extruder to be squeezed into rectangular stripe shape after adopting the biaxial rneader stirring to be moist shape, through the blank cutter excision forming, under the pressure of 20～30Mpa, make the adobe of paper mill sludge light-weight environment-friendly, carry out seasoning after 7 days.Again moulding after sending tunnel furnace to, the paper mill sludge light-weight environment-friendly adobe electricity consumption bottle car of seasoning is carried out roasting.After roasting, make paper mill sludge baked light-weight environmental-friendly bricks product.Thereby solved the high problem of handling difficulty of paper mill sludge heavy metal content, realized the resource recycling of paper mill sludge, to reduce pollution to physical environment.
Also can be made into the holllow building block and the pavement bricks of different size with raw material of the present invention.
The paper mill sludge baked light-weight environmental-friendly bricks of producing according to the technology of the present invention, through the relevant building materials quality detection department check of Country family's regulation, every technical indicator all reaches the construction material standard-required that Country family stipulates.
Building material product quality test center detected result is as follows through Guangdong Province's building materials research institute:
Paper mill sludge baked light-weight environmental-friendly solid brick detects: according to Guangzhou capital construction commission file: (2002) No. 15 literary compositions of fringe building and GB13545-2003 standard.Specification: 240x115x53mm.
A) ultimate compression strength: 10 mean value: 14Mpa, monolithic minimum value: 11.03Mpa.
B) anti-folding Strong degree: mean value: 3.3Mpa, monolithic minimum value: 2.8Mpa.
C) water-intake rate 16.6%.
D) volume density is: 1462Kg/m
3
E) radioactivity: internal radiation: 0.10, external radiation exposure: 0.53, be better than national standard.Test basis: GB6566-2001 " the radioactive material nucleic is limited the quantity of "
The test basis of paper mill sludge light-weight hollow building block made: GB/T15229-2002, specification is: 390X190X190mm, ultimate compression strength mean value is: 8.0Mpa, the monolithic minimum value is: 6.8Mpa, dry apparent density is: 1000Kg/m
3, contract with dry rate is: 0.023%, all be better than 5.0 grades the standard that Country family stipulates.
Owing to take technique scheme the technology of the present invention compared with the prior art to have following advantage and effect:
A) paper mill sludge baked light-weight environmental-friendly bricks of the present invention is all sealed the high-content toxic heavy metal of paper mill sludge up for safekeeping in adobe in high-temperature calcination process, has killed all unwanted bacterias through high temperature, has avoided secondary pollution.And brick do not have the peculiar smell hole many, has certain sound insulation, effect of heat insulation etc.; Because the relative density of paper mill sludge, slag, cinder is littler than clay, therefore, each piece light-weight environment-friendly brick is than more than the light 0.7kg of clay solid brick, and it is lighter more than 35% than stone flour cement block to make holllow building block.Therefore can alleviate the deadweight of buildings and the work-ing life of prolongation high-rise building;
B) production technique is simple, three-waste free discharge, meet national energy-saving and emission-reduction, development low-carbon economy and No. 66 literary compositions of circular economy policy and Country affair institute " energy-conservation, save land, water saving, material-saving, sharp useless, insulation, new construction material such as heat insulation " and require spirit about greatly developing, and less investment, See imitate fast, cost is low, profitable;
C) utilize paper mill sludge, river surge silt, slag, cinder brickmaking to substitute traditional solid clay brick, be green, environmental protection, energy-saving building material, development prospect is widely arranged;
D) adopt paper mill sludge cinder and slag as the internal combustion roasting raw material of light-weight environment-friendly brick, can make full use of flammable industrial wastes such as paper mill sludge cinder and slag, save energy reduces cost, and reduces environmental pollution again.Also can accelerate the rate of roasting of tunnel furnace, quicken the turnover of tunnel furnace, improve the quality and the output of finished bricks.Shorten the body drying cycle, alleviate the apparent density of finished bricks.Reduce thermal conductivity and thermosteresis, improve the heat-insulation and heat-preservation ability; Increase the benefit.
E) solve paper mill sludge, river surge silt, cinder and slag and in the landfill process, needed the difficult problem that takies a large amount of land resources and cause secondary pollution easily; both protected environment; saved the soil again, made the resource regeneration rate of paper mill sludge reach 100%.
Embodiment
Embodiment 1
The sanitary sewage of living quarters discharging in trade effluent that the paper mill is produced in producing the paper product process and the factory, through a kind of mixed waste of separating after sewage work's processing, through dehydration, deodorizing, disinfection, chelation treatment, drying, after abrasive dust, sorting, make particle diameter again and be paper mill sludge powder less than-2mm;
A kind of solid waste of the argillaceous sand stone that discharges in discarded body refuse that discharges when digging basis and underground parking in the dwelling construction and the urban engineering project, through sorting, fragmentation, pulverizing, screening, drying, make particle diameter again after abrasive dust, the sorting and be the useless body refuse powder of engineering less than-2mm;
All are poured into the useless husky a kind of waste of a large amount of mud that discharges in the row cleaning regulation process by the river of sewage pollution, close processings, drying through dehydration, deodorizing, disinfection, huge legendary turtle, make particle diameter again after abrasive dust, the sorting and be river surge silt powder less than-2mm;
With the waste residue of discharging behind the domestic garbage burning electricity generation, remove scrap metal through sorting, pulverizing, magnetic separation after, make particle diameter through abrasive dust, sorting and be cinder powder less than-2mm;
The waste residue that briquette boiler burning back is discharged, remove scrap metal through fragmentation, sorting, pulverizing, magnetic separation after, to make particle diameter be slag powder less than-2mm for abrasive dust, sorting again.
Get the paper mill sludge powder 30kg of above-mentioned preparation, the engineering body refuse powder 38kg that gives up, river surge silt powder 25kg, cinder powder 28kg, slag powder 18kg, particle diameter is-the unslaked lime powder 18kg of 0.08mm, calcium sulfate 3kg, yellow soda ash 2kg, borax 1kg, ferrous sulfate 3kg, sal epsom 5kg, Li high molecular heavy metals intercalating agent 0.8kg and water 15kg, utilize de-airing extruder to be squeezed into rectangular stripe shape after above-mentioned raw materials mix adopted biaxial rneader to stir to be moist shape, through the blank cutter excision forming, under the pressure of 28Mpa, make the adobe of paper mill sludge light-weight environment-friendly, carry out seasoning after 7 days, again moulding is carried out roasting after the light-weight environment-friendly adobe electricity consumption bottle car of seasoning is sent tunnel furnace to, after roasting, make paper mill sludge baked light-weight environmental-friendly bricks product.Average after testing resistance to compression Strong degree is: 14Mpa, folding strength is: 3.3Mpa.Water-intake rate 16.6%, volume density 1462kg/m
3, radioactivity: internal radiation 0.10, external radiation exposure 0.53, requirement all is up to state standards.
Embodiment 2
Get the paper mill sludge powder 35kg of embodiment 1, the engineering body refuse powder 36kg that gives up, river surge silt powder 30kg, cinder powder 25kg, slag powder 25kg, particle diameter is the unslaked lime powder 15kg of 0.08mm, calcium sulfate powder 4.5kg, yellow soda ash 1.5kg, borax 1.5kg, ferrous sulfate 2.5kg, sal epsom 7kg, Li high molecular heavy metals trapping agent 0.6kg and water 20kg, utilize de-airing extruder to be squeezed into rectangular stripe shape after above-mentioned raw materials mix adopted biaxial rneader to stir to be moist shape, through the blank cutter excision forming, under the pressure of 29Mpa, make the adobe of paper mill sludge light-weight environment-friendly, carry out seasoning after 7 days, again moulding is carried out roasting after the paper mill sludge environmental protection adobe of seasoning is sent tunnel furnace to electromobile, after roasting, make paper mill sludge baked light-weight environmental-friendly bricks product.Average after testing resistance to compression Strong degree is: 12Mpa, anti-folding Strong degree is: 2.9Mpa.
Embodiment 3
Get the paper mill sludge powder 40kg of embodiment 1, the engineering body refuse powder 28kg that gives up, river surge silt powder 35kg, cinder powder 18kg, slag powder 28kg, particle diameter is the unslaked lime powder 12kg of 0.08mm, calcium sulfate powder 6kg, yellow soda ash 1kg, borax 2kg, ferrous sulfate 2kg, sal epsom 8kg, Li high molecular heavy metals trapping agent 0.5kg and water 25kg, use the mechanical vibration extrusion molding after above-mentioned raw materials mix adopted biaxial rneader to stir to be moist shape, under the pressure of 30Mpa, make the paper mill sludge light-weight hollow building block made, carry out seasoning after 7 days, again moulding is carried out roasting after the paper mill sludge light-weight hollow building block made of seasoning is sent tunnel furnace to electromobile, after roasting, make paper mill sludge light-weight hollow building block made product.Mean compressive strength is after testing: 8.0Mpa, and the monolithic minimum value is: 6.8Mpa, dry apparent density is: 1000kg/m3, contract with dry rate is: 0.023%, all be better than 5.0 grades standard of national regulation.
Embodiment 4
Get the paper mill sludge powder 35kg of embodiment 1, the engineering body refuse powder 32kg that gives up, river surge silt powder 30kg, cinder powder 23kg, slag powder 23kg, particle diameter is the unslaked lime powder 15kg of 0.08mm, calcium sulfate powder 5kg, yellow soda ash 1.5kg, borax 1.5kg, ferrous sulfate 2.5kg, sal epsom 7kg, Li high molecular heavy metals trapping agent 0.7kg and water 20kg, utilize de-airing extruder to be squeezed into rectangular stripe shape after above-mentioned raw materials mix adopted biaxial rneader to stir to be moist shape, through the blank cutter excision forming, under the pressure of 26Mpa, make the adobe of paper mill sludge light-weight environment-friendly, carry out seasoning after 7 days, again moulding is carried out roasting after the paper mill sludge environmental protection adobe of seasoning is sent tunnel furnace to electromobile, after roasting, make paper mill sludge baked light-weight environmental-friendly bricks product.Average after testing resistance to compression Strong fish degree is: 13Mpa, anti-folding Strong degree is: 3Mpa.
Embodiment 5
Get the paper mill sludge powder 38kg of embodiment 1, the engineering body refuse powder 35kg that gives up, river surge silt powder 33kg, cinder powder 25kg, slag powder 25kg, particle diameter is the unslaked lime powder 16kg of 0.08mm, calcium sulfate powder 6kg, yellow soda ash 1.8kg, borax 1.8kg, ferrous sulfate 2.8kg, sal epsom 8kg, Li high molecular heavy metals trapping agent 0.8kg and water 23kg, utilize de-airing extruder to be squeezed into rectangular stripe shape after above-mentioned raw materials mix adopted biaxial rneader to stir to be moist shape, through the blank cutter excision forming, under the pressure of 28Mpa, make the adobe of paper mill sludge light-weight environment-friendly, carry out seasoning after 7 days, again moulding is carried out roasting after the paper mill sludge environmental protection adobe of seasoning is sent tunnel furnace to electromobile, after roasting, make paper mill sludge baked light-weight environmental-friendly bricks product.Average after testing resistance to compression Strong degree is: 14Mpa, anti-folding Strong degree is: 3.5Mpa.
Claims (4)
1. baked light-weight environmental-friendly bricks of producing with paper mill sludge is characterized in that it is made by the following weight proportion raw material;
30～40 parts of paper mill sludge powders
28～38 parts of the useless body refuse powders of engineering
25～35 parts of river surge silt powders
18～28 parts of cinder powders
18～28 parts of slag powders
12～18 parts of unslaked lime powders
3～6 parts of calcium sulfate powders
1～2 part in yellow soda ash
1～2 part of borax
2～3 parts in ferrous sulfate
5～9 parts in sal epsom
0.5～0.8 part of Li high molecular heavy metals trapping agent
15～25 parts in water,
The sanitary sewage of living quarters discharging in described paper mill sludge powder trade effluent that to be the paper mill produce in producing the paper product process and the factory, through a kind of mixed waste of separating after sewage work's processing, through dehydration, deodorizing, disinfection, chelation treatment, drying, after abrasive dust, sorting, make particle diameter again and be powder less than-2mm;
The useless body refuse powder of described engineering is a kind of solid waste of the argillaceous sand stone that discharges in the discarded body refuse that discharges when digging basis and underground parking in the dwelling construction and the urban engineering project, through sorting, fragmentation, pulverizing, screening, drying, make particle diameter again after abrasive dust, the sorting and be powder less than-2mm;
Described river surge silt powder is that all are poured into the useless husky a kind of waste of a large amount of mud that discharges in the row cleaning regulation process by the river of sewage pollution, close processings, drying through dehydration, deodorizing, disinfection, huge legendary turtle, make particle diameter again after abrasive dust, the sorting and be powder less than-2mm;
Described cinder powder is the waste residue of discharging behind the domestic garbage burning electricity generation, removes rolling behind the scrap metal through sorting, pulverizing, magnetic separation, makes particle diameter through abrasive dust, sorting and is the powder less than-2mm;
Described slag powder is the waste residue that discharge briquette boiler burning back, remove scrap metal through fragmentation, sorting, pulverizing, magnetic separation after, to make particle diameter be powder less than-2mm for abrasive dust, sorting again.
2. as the manufacture method of a kind of baked light-weight environmental-friendly bricks of producing with paper mill sludge according to claim 1, it is characterized in that it is undertaken by following step:
(a) with the paper mill sludge powder of 30～40 weight parts, the engineering of 28～38 weight parts body refuse powder that gives up, the river surge silt powder of 25～35 weight parts, the cinder powder of 18～28 weight parts, the slag powder of 18～28 weight parts, the unslaked lime powder of 12～18 weight parts, the calcium sulfate of 3～6 weight parts, 1～2 weight parts of sodium carbonate, the borax of 1～2 weight part, the ferrous sulfate of 2～3 weight parts, the sal epsom of 5～9 weight parts, 0.5 the Li high molecular heavy metals trapping agent of～0.8 weight part and the water of 15～25 weight parts are raw material, adopt the double-shaft mixing agitator stirring to be moist shape and be squeezed into rectangular stripe shape with de-airing extruder, through the blank cutter excision forming, under the pressure of 20～30Mpa, make the paper mill sludge light-weight environment-friendly adobe of moulding, carry out seasoning
(b) (a) paper mill sludge light-weight environment-friendly adobe after seasoning being sent to tunnel furnace carries out roasting and makes paper mill sludge baked light-weight environmental-friendly bricks product again.
3. paper mill sludge baked light-weight environmental-friendly bricks according to claim 1 and 2 is characterized in that also can be made into paper mill sludge baked light-weight holllow building block with the raw material of environmental protection brick.
4. according to claim 1,2 or 3 described paper mill sludge baked light-weight environmental-friendly bricks, it is characterized in that its powder particle diameter of described unslaked lime and calcium sulfate is the powder less than-0.08mm.
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| CN102180698A (en) * | 2011-02-11 | 2011-09-14 | 李桓宇 | Sintered light environment-friendly brick produced from riverway bottom mud and manufacturing method thereof |
| CN102329110A (en) * | 2011-06-21 | 2012-01-25 | 东莞市保源达房地产开发有限公司 | Lightweight brick manufactured by utilizing paper mill sludge and manufacturing method thereof |
| CN108503334A (en) * | 2018-04-03 | 2018-09-07 | 河南理工大学 | A kind of large dosage paper mill sludge air-entrained concrete building block and preparation method thereof |
| CN108503334B (en) * | 2018-04-03 | 2020-12-25 | 河南理工大学 | High-dosage papermaking sludge aerated concrete block and preparation method thereof |
| CN110171956A (en) * | 2019-05-22 | 2019-08-27 | 福道联合(天津)大数据有限公司 | The method for preparing revetment brick using low concentration oil-polluted soils |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101913842B (en) | 2012-07-11 |
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