CN102786290A - Technology for manufacturing green sintered wall material through utilizing construction wastes - Google Patents
Technology for manufacturing green sintered wall material through utilizing construction wastes Download PDFInfo
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- CN102786290A CN102786290A CN2012102491403A CN201210249140A CN102786290A CN 102786290 A CN102786290 A CN 102786290A CN 2012102491403 A CN2012102491403 A CN 2012102491403A CN 201210249140 A CN201210249140 A CN 201210249140A CN 102786290 A CN102786290 A CN 102786290A
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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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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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Abstract
A technology for manufacturing a green sintered wall material through utilizing construction wastes is characterized in that the wall material is prepared through adding 60-50 parts by volume of loess having a high plasticity, gangue having a high plasticity, or a mixture of the loess and the gangue to 40-50 parts by volume of the construction wastes as a binder, through extrusion molding, and through sintering. The technology enables a limit resource to be reutilized, and environmental protection and resource problems to be solved.
Description
Technical field
The invention belongs to sintering walling production field, is to utilize building waste to make sinter walling materials technology.
Background technology
The handling problems of building waste has become the major issue of domestic common concern.The Eleventh Five-Year Plan period, the made from construction refuse resource disposal technology of exploitation can effectively solve the handling problems of part building waste, but to the disposal of architecture sediment and the resource utilization problem of part building waste, still be difficult to solve.
At present; Domestic to produce the research of Technology and equipment of non-sintering walling goods comparatively deep with made from construction refuse resource, and set up the demonstration production line, still; Produce the research of sinter walling materials for building waste; Domesticly just rest on the laboratory study stage, do not form industrialization, and equipment is also developed targetedly.Therefore, green sinter walling materials molding technology thereof of research building waste and equipment make construction refuse regenerated building resource technology increase a disposal approach again.
In recent years, Urbanization in China is accelerated, and housing industrialization and living standards of the people improve constantly, and urban construction, middle town development, new countryside construction scale increase substantially, to the demand rapid growth of high quality, multifunctional green building materials.China proposes the ambitious goal of " building a New Socialist Countryside "; The most important living conditions that will guarantee people exactly improve and improve; And the increase living space is strengthened the transformation of original villages and small towns, must drive increasing substantially to high quality, novel wall material consumption.Along with the expansion of China's materials for wall scope of the enterprise, process unit will be developed to big-and-middle-sized scale direction by middle-size and small-size, certainly will require to equip the mass-producing of output.The brick extruding production equipment of exploitation top grade, high level, robotization, last scale is sent exhibition trend elsewhere to adapt to wall, has also become the inexorable trend of development.
On the other hand, each big city not only produces building waste, and in subway work scene and construction site, produces a large amount of architecture sediments and construction dregs, has become the obstacle and the requirement of urban development.Particularly the Central Shanxi Plain-economy area, the sky and water increases severely to the requirement of building construction year by year, also must bring the handling problems of building waste and architecture sediment.
The handling problems of building waste has become the major issue of social common concern.Along with improving constantly of scale of urbanization and consumption of resident level, the growth of building waste also very rapidly.According to statistics, China is since 1979, and building waste is with the speed increase of annual 8-10%, and national large, medium and small city (town) building waste YO is near 200,000,000 tons, and occupation of land reaches about 3,750 ten thousand m.The Western European countries such as Britain, Germany, Austria, Holland show calculating, measurement, the record result of a large amount of old building (dwelling house more than 50 years, more than 80 years, more than 100 years, public and Industrial buildings) at the scene of removing; According to the difference of fabric structure form, the amount of waste material of unit volume average generation is between 375-401kg/m.The buildings waste material total quantity that possibly occur when terminate the work-ing life of these City Buildings will reach 45,000,000,000 tons.The handling problems of building waste has become the major issue of domestic common concern.The Eleventh Five-Year Plan period, the made from construction refuse resource disposal technology of exploitation can effectively solve the handling problems of part building waste, but to the disposal of architecture sediment and the resource utilization problem of part building waste, still be difficult to solve.Therefore, building waste and architecture sediment recycling are produced sintered article, for solve the handling problems of building waste and architecture sediment effectively, comprehensively; Another effective way and method are provided; Thereby make limited resources be able to utilize again, solved environmental protection and resource problem again, this is to develop a circular economy; The friendly type material of construction of development environment is realized one of important behave of buildings and resources environment sustainable development.
Summary of the invention
The present invention seeks to propose a kind of technology of utilizing building waste to produce sinter walling materials, thereby make limited resources be able to utilize again, solved environmental protection and resource problem again.
Briefly; Utilize building waste to produce the technology of sinter walling materials; It is characterized in that adopting parts by volume to add higher loess of plasticity or coal gangue or its mixture as sticker, and the sticker parts by volume is 60-50, processes materials for wall through sintering after the extrusion molding for the 40-50 building waste.
Specifically, the present invention implements according to following steps:
(1) batch mixing: the building waste parts by volume is 40-50, and the 60-50 parts by volume is the sticker of the higher loess of plasticity or coal gangue or its mixture work formation, adds 100-1500 parts in water after mixing; Compound is stirred more than the 5min, carry out ageing afterwards and be no less than 4h; Compound is subsequent use;
(2) extrusion moulding: be extruded into the base material with forcing machine;
(3) natural drying 10h;
(4) oven dry: initial temperature was 40 ℃ when the base material was inserted baking oven, per hour heated up average 50 ℃, and baking 8-9h is to the base substrate complete drying;
(5) sintering: the base material is inserted sintering oven, and 100 ℃ of initial temperatures per hour on average heat up 100 ℃, and temperature is opened to 990 ℃, and penetrating back keeps 3h-4h, behind the naturally cooling, take out.
The present invention is through the understanding to building waste and mixture performance thereof, and exploitation is fit to the green sinter walling materials mass-producing of the building waste Technology of novel wall material large-scale development demand.Domestic have some research institutions to do this type of research, but be to become regeneration aggregate to construction waste crushing mostly, substitutes natural sandstone, is used to make recycled concrete block, wallboard and paving brick etc.; But there are big, easy to crack, the congenital not enough problems such as unit weight is high, heat conductivility difference of shrinking in these non-sintered articles.Therefore, make sintered article, can address these problems, and market is accepted fast with it.Yet building waste is produced the sinter walling materials goods, at present the domestic experimental stage that also rests on mostly.Project team through repeatedly, repeatedly the test of preparing burden, the building waste spike is than reaching 40%～50%.
Embodiment
Utilize building waste make green sinter walling materials produce in as the recovery powder that uses when too low,
Plastic material is handled comparatively difficulty with the homogenizing that reclaims powder; When recovery powder add-on is too high, in moulding, have any problem again.Test shows that in the time of will making homo-effect and molding effect reach optimum regime, the ratio that reclaims powder and plastic material is (respectively the accounting for 50%) that equates haply, and at this moment, green compact also have enough intensity.After 1100 ℃ of following roastings, the unit weight of finished product is 1.5-1.95t/m, and product strength is also better.
1, building waste and the research of compound raw material use characteristics thereof
(1) material chemical component and plasticity composition test.
1., mix after pulverizing in (1:1) ratio with useless brick+broken concrete, its chemical constituents determination value is:
| Chemical ingredients | SiO 2 | Al 2O 3 | Fe 2O 3 | Ca0 | MgO |
| (%) content | 59.23 | 12.95 | 3.23 | 2.56 | 2.97 |
2., mix after pulverizing by 1:1 with useless brick+useless ash+dirt sand+concrete blocks, its chemical constituents determination value is:
| Chemical ingredients | SiO 2 | Al 2O 3 | Fe 2O 3 | Ca0 | MgO |
| (%) content | 59.63 | 13.08 | 3.27 | 3.65 | 3.45 |
3., through test, these two kinds of basic non-plastics of raw material.
(2) chemical composition analysis of spike clay and plasticity test.
1., its chemical constituents determination value is:
| Chemical ingredients | SiO 2 | Al 2O 3 | Fe 2O 3 | Ca0 | MgO |
| (%) content | 61.96 | 11.99 | 4.82 | 4.58 | 2.17 |
2., clay water ratio (natural moisture content): 5.35%
3., the clay plasticity index is measured: IP=13.93
(3) building waste and spike additive clay bulk testing
Step 1: material fiting ratio example (volume ratio) is according to brick powder: sticker=60:40;
Step 2: raw material is mixed, add water 100mL-1500mL after mixing;
Step 3: compound is stirred 5min, carry out ageing 4h afterwards.
(4) material homogenizer treatment process exploitation
Research makes inductile solid waste building waste and the full and uniform material treatment process technology of mixing of jointing compound, for plasticity-and the processability that improves the solid waste raw material provides safeguard.The special homogenizing process technology of paying attention to raw material on Germany, France, Italian hollow brick production line, principal feature is:
Homogenization degree is high, and wear resisting property is good, technology such as energy saving.
The index that the material homogenizer technology reaches:
Homogenizing rate: >=95%
Plasticity index improves: 5～7
Reduce moulding moisture: 3%～5%
(5) extrusion moulding test
Step 1: with small-scale test brick machine extrusion moulding (3 hole);
Step 2: natural drying 10h;
Step 3: oven dry: initial temperature was 40 ℃ when sample was inserted baking oven, (on average) 50 ℃ that per hour heat up, and baking 8-9h is to the base substrate complete drying.
Step 4: sintering: sample is inserted the sintering retort furnace, 100 ℃ of initial temperatures, per hour heat up 100 ℃ (on average), temperature is opened to 990 ℃; The sample sintering is penetrating in the stove, keeps 3h-4h, powered-down; Close stove (fire door), wait naturally cooling after, sample is taken out.
(6) small sample is carried out the performance test test, obtains as drawing a conclusion:
Burst test: maximal destruction size 8mm; Meet the salable product requirement;
Freezing test: crackle, layering, scaling, truncation phenomenon do not occur; Meet the salable product requirement;
The scum test: slight cold cream, most of samples do not have cold cream; Meet the salable product requirement.
2, the research of the green sinter walling materials molding technology thereof of building waste
This project has been studied the molding technology thereof that is suitable for 50% clay and building waste proportioning emphatically to the characteristics of the green sinter walling materials complex forming technology of building waste; Develop moulds such as the core print that is easy to hole and forms, core frame; Develop high extrusion pressure electricity-saving type vacuum forming equipment; Mud cylinder liner and screw reamer wear resisting property are studied, wear-resisting reamer is reached >=400h work-ing life.
The index that forming technique reaches is:
Extrusion pressure: >=4.0MPa
Vacuum tightness: >=95%
Moulding water ratio: 16%～22%
Hourly output: 22000
(1) demonstration brick field experimental study
The East China brick field carries out production test in Hua Zhu township, Fuping County, Shaanxi Province with this testing data in project team.
Test one: building waste with 60% and 40% clay mix, and carry out the moulding test, because local clay is a clay inferior, plasticity does not reach the moulding requirement, and processability is relatively poor.
The clay inferior of coal gangue+30% of testing two: 45% building waste+30% is carried out to the type test, and effect is better.
Test the building waste of three: 60% clay+40%, with or respectively account for 50% mixed, to equip (vacuum tightness is more than 4.0mba) effect better with the extrusion molding of moulding firmly of big pressure, condition of high vacuum degree, otherwise relatively poor.
Building waste 40-50, all the other are sticker, loess, coal gangue that plasticity is higher
3. technical characterstic
The selection of construction waste sintering brick jointing compound and proportioning gordian technique break through.
Building waste is as the raw material of vitrified brick, owing to be discarded concrete and vitrified brick mostly, its basic non-plastic; Be difficult to moulding, must add certain jointing compound, like the higher loess of plasticity, coal gangue etc.; In town and country construction; Take now the foundation treatment mode of heavy excavation mostly, produce a large amount of architecture sediments---foundation pit earth, side slope are native, also can be used as the main raw material of construction waste sintering brick.Project team through repeatedly, repeatedly prepare burden the test and the certain process means, can realize that the utilization ratio of building waste or architecture sediment reaches 40%～50%.
The fineness of bond and several kinds of raw material uniform mixing Technologies, can will directly determine extrusion moulding.In the raw material of building waste process in small, broken bits, must pulverize through letter sorting, screening, multiple tracks, it is crushed into the aggregate about 1-2mm; Just can brickmaking, it is thin more that aggregate is pulverized, and moulding just is easier to; Otherwise; Aggregate is thick more, not only can influence moulding, but also influences the inner quality and the overall dimensions and attractive in appearance of adobe., after pulverizing, adding a certain amount of jointing compound, need carry out adding the water ageing about 72h to the building waste aggregate, make its group's of formation material shape, but moisture be unsuitable excessive, is advisable to remain on 3～12%.
Plasticity characteristics according to raw material adopt different molding modes and water ratio.Plasticity index can be selected hard expressing technique 7 for use when following; Plasticity index can adopt semihard to mould extrusion moulding between 7～11; Plasticity index can adopt soft moulding to extrude 11 when above.Extrude firmly, semihard moulds to extrude with the soft extrusion moulding moisture of moulding and is respectively more than 14%～16%, 17%～18% and 19%; The forcing machine WP is respectively 2.0～2.2MPa, 1.2～1.9Mpa and below the 1.1Mpa.Like this, under the situation that can satisfy output, guarantee that the even extrusion moulding of raw materials mix is the key on the whole production line; According to solid waste Material Characteristics such as building waste or architecture sediment exploitations condition of high vacuum degree, big extrusion pressure mould vacuum-extruder (and 60 type semihards are moulded vacuum-extruder) firmly, wet basis water ratio 12%-16%, the blank strength of extruding is high; Shrinking percentage is little; Not yielding, drying cycle is short, can directly carry out kinds of processes to product surface and handle; Like surface galling, glaze spraying etc., be fit to semi-stiff extrusion process.
Claims (5)
1. utilize building waste to produce the technology of sinter walling materials; It is characterized in that adopting parts by volume is that the building waste of 40-50 adds higher loess of plasticity or coal gangue or its mixture as sticker; And the sticker parts by volume is 60-50, processes materials for wall through sintering after the extrusion molding.
2. the technology of utilizing building waste to produce sinter walling materials according to claim 1 is characterized in that implementing according to following steps:
(1) batch mixing: the building waste parts by volume is 40-50, and the 60-50 parts by volume is the sticker of the higher loess of plasticity or coal gangue or its mixture work formation, adds 100-1500 parts in water after mixing; Compound is stirred more than the 5min, carry out ageing afterwards and be no less than 4h; Compound is subsequent use;
(2) extrusion moulding: be extruded into the base material with forcing machine;
(3) natural drying 10h;
(4) oven dry: initial temperature was 40 ℃ when the base material was inserted baking oven, per hour heated up average 50 ℃, and baking 8-9h is to the base substrate complete drying;
(5) sintering: the base material is inserted sintering oven, and 100 ℃ of initial temperatures per hour on average heat up 100 ℃, and temperature is opened to 990 ℃, and penetrating back keeps 3h-4h, behind the naturally cooling, take out.
3. the technology of utilizing building waste to produce sinter walling materials according to claim 2 at first will be pulverized through letter sorting, screening, multiple tracks in the raw material of building waste process in small, broken bits in its characteristic compounding process, and it is crushed into the aggregate about 1-2mm; After adding sticker, need carry out near 72h add the water ageing, make its group's of formation material shape, water cut remains on 3～12% and is advisable.
4. the technology of utilizing building waste to produce sinter walling materials according to claim 2, controlling index is when it is characterized in that extrusion moulding: extrusion pressure: >=4.0MPa; Vacuum tightness: >=95%; Moulding water ratio: 16%～22%.
5. the technology of utilizing building waste to produce sinter walling materials according to claim 2, select following expressing technique according to the raw material plasticity index when it is characterized in that extrusion moulding:
Plasticity index is selected hard expressing technique when following for use 7; Plasticity index adopts semihard to mould extrusion moulding between 7～11; Plasticity index adopts when above soft moulding to extrude 11; And extrude firmly, semihard moulds to extrude with the soft extrusion moulding water ratio of moulding and is respectively more than 14%～16%, 17%～18% and 19%; The forcing machine WP is respectively 2.0～2.2MPa, 1.2～1.9Mpa and below the 1.1Mpa.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104016658A (en) * | 2014-06-17 | 2014-09-03 | 马东升 | Method of preparing interior wall tile by using local wastes in Inner Mongolia and interior wall tile product prepared by same |
| CN107056239A (en) * | 2017-04-26 | 2017-08-18 | 长沙锦佳环保科技有限公司 | A kind of metro shield sintering brick using schist as raw material and production method |
| CN107056240A (en) * | 2017-04-26 | 2017-08-18 | 长沙锦佳环保科技有限公司 | A kind of production method of utilization metro shield soil configuration sintered common clay brick |
| CN114620994A (en) * | 2022-04-24 | 2022-06-14 | 醴陵千汇实业有限公司 | Solid waste clay and preparation method thereof |
| CN115784710A (en) * | 2022-12-13 | 2023-03-14 | 福建七彩陶瓷有限公司 | Breathing floor tile and production method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016658A (en) * | 2014-06-17 | 2014-09-03 | 马东升 | Method of preparing interior wall tile by using local wastes in Inner Mongolia and interior wall tile product prepared by same |
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| CN107056239A (en) * | 2017-04-26 | 2017-08-18 | 长沙锦佳环保科技有限公司 | A kind of metro shield sintering brick using schist as raw material and production method |
| CN107056240A (en) * | 2017-04-26 | 2017-08-18 | 长沙锦佳环保科技有限公司 | A kind of production method of utilization metro shield soil configuration sintered common clay brick |
| CN114620994A (en) * | 2022-04-24 | 2022-06-14 | 醴陵千汇实业有限公司 | Solid waste clay and preparation method thereof |
| CN115784710A (en) * | 2022-12-13 | 2023-03-14 | 福建七彩陶瓷有限公司 | Breathing floor tile and production method thereof |
| CN115784710B (en) * | 2022-12-13 | 2023-10-20 | 福建七彩陶瓷有限公司 | Breathing floor tile and production method thereof |
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Application publication date: 20121121 |