CN104876519B - A kind of Pb-Zn tailings and Aggregate of recycled concrete prepare autoclaved lime-sand brick method - Google Patents
A kind of Pb-Zn tailings and Aggregate of recycled concrete prepare autoclaved lime-sand brick method Download PDFInfo
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- CN104876519B CN104876519B CN201410155278.6A CN201410155278A CN104876519B CN 104876519 B CN104876519 B CN 104876519B CN 201410155278 A CN201410155278 A CN 201410155278A CN 104876519 B CN104876519 B CN 104876519B
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Processing Of Solid Wastes (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
A kind of method that Pb-Zn tailings and Aggregate of recycled concrete prepare autoclaved lime-sand brick, belongs to comprehensive utilization of resources and building material field.The autoclaved lime-sand brick is characterized in that being made of Pb-Zn tailings, Aggregate of recycled concrete and quick lime, and each material component percentage by weight is：Pb-Zn tailings 50%~85%, Aggregate of recycled concrete 10%~40%, quick lime 5%~15%；Preparation process is：Raw material crushes, once plus water stirring, stands the processes such as digestion, the stirring of secondary plus water, compressing, Jing Tingduiduo and steam press maintenance.Autoclaved lime-sand brick prepared by the present invention is up to MU15~20 grade, with characteristics such as high intensity, high elastic modulus and good frost resistances, utilization rate of solid waste is up to 85%, open new utilization ways to Pb-Zn tailings and Aggregate of recycled concrete the solid waste resource comprehensive utilization being difficult to be utilized, advantageously account for solid waste largely occupy cultivated land caused by stockpiling, environmental pollution and social safety problem.
Description
Technical field
The present invention relates to one kind steam-pressing brisk method is prepared as primary raw material using Pb-Zn tailings and Aggregate of recycled concrete.It is one
Kind can large scale using Pb-Zn tailings and Aggregate of recycled concrete production autoclaved lime-sand brick technology of preparing.The invention belongs to provide
Source field of comprehensive utilization and building material field.
Background technology
At present, during China's Pb-Zn deposits are adopted, selected, the Mine Solid Wastes of substantial amounts, these solid wastes are produced
Thing is handled using Tailings Dam stockpiling mode more.As coloured industry grows rapidly expansion and the mining of Development of lead-zinc mine scale
The extension of history, the increase of the accumulating amounts of Pb-Zn tailings also year by year.
With the development of urbanization process, building will produce number with ten million ton every year during dismounting and construction
Discarded concrete, and these discarded concrete are handling as building waste and are taking substantial contribution in stacking process, also
Secondary pollution can be caused to surrounding environment.
China is the few country of typical per capita cultivated land, as country is to the further protection in policy of land resource, for
It is also critical problem urgently to be resolved hurrily to stack the land resource taken by industrial residue and building waste.Simultaneous is former
The famine of year coal price continuous rise and some areas coal resources, State Economic and Trade Commission forbid the production of fired brick,
Therefore no-firing brick is needed to replace.The steam-pressing brisk produced with solid waste is one of typical no-firing brick, then such as
What comprehensively utilizes the mine solid waste Pb-Zn tailings and discarded concrete of accumulation, it has also become bargh, colleges and universities,
One of problem of institute's primary study.
Mainly concentrated on the secondary use technology of Pb-Zn tailings and building waste both at home and abroad at present and prepare Building wood
Material, including prepare fired brick, steam-cured standard brick, cement products etc..
Patent of invention《A kind of autoclaved Brick from high content construction garbage and its production method》(publication number CN101306929A, it is public
Open a day 2008.11.19) disclose and a kind of produce MU10 using discarded concrete, discarded brick powder, pulverized limestone and carbide slag for raw material
Steam-pressing brisk.Its production technology is：Discarded concrete and brick powder are first made suitable granularity, then with pulverized limestone or calcium carbide
Slag mixing and water adding stirs, and then carries out steam pressure shaping.Its main feature is that largely having used industrial residue in raw material, and can reach
To the features such as low, discharge amount of exhaust gas is low of consuming energy.But its shortcoming is：First, the steam-pressing brisk of its production has only reached national mark
MU10 ranks in standard, the scope that can be applicable in are smaller；Second, the content of its carbide slag effective CaO is smaller, production is so easy to cause
The compressing defect rate of steam pressure adobe it is high.
Patent of invention《A kind of method that Pb-Zn tailings prepare silicate brick》(publication number CN103058618A, publication date
2013.04.24) disclose one kind and make aggregate using Pb-Zn tailings, then add lime, quartz sand powder and river sand and prepare silicate
The method of steam-pressing brisk.Its production technology is：Once plus water stirring, treat lime fully digests, secondary plus water is stirred, rolled, pressurizeing,
Stand, steam pressure.Its main feature is that it make use of Pb-Zn tailings that there is higher real density easily by the compressing spy of silicate steam-pressing brisk
Point.But the drawback is that the utilization rate of industrial residue is too low, and the raw materials such as river sand, quartz sand have been used, add cost.
Patent of invention《Steam-curing-free light-weight wall body carbonized brick and preparation method thereof》(publication number CN103011740A, publication date
2013.04.03) disclose one kind and prepare non-evaporating foster lightweight wall using Pb-Zn tailings, quick lime, gypsum, cement and additive
The method of carbonated lime brick.Its production technology is：Raw material crushes plus water stirring, injection mould, carbonized maintaining, shaping.Its advantage is not
With steam pressure environment, but utilize the high-temperature flue gas for producing and being discharged during cement, environmental protection.But be outside its foot raw material for
The utilization rate of industrial residue is low, while the construction of carbonization environment is cumbersome with managing.
The invention discloses a kind of method that steam-pressing brisk is prepared with Pb-Zn tailings, Aggregate of recycled concrete, lime, lead is utilized
Activity SiO in zinc tailing2Aquation hydro-thermal reaction occurs under the conditions of autoclave at high temperature with lime, the hydrated product Tuo Beimo of generation comes
Stone, mirabilitum crystallina pomegranate stone and C-S-H gels, hydrated product and have neither part nor lot in reactionlessness particle and Aggregate of recycled concrete is well combined,
The steam-pressing brisk intensity of preparation meets production requirement, not only the national policy of environmental protection is being responded, also for Pb-Zn tailings and again
The comprehensive utilization of growing concrete aggregate provides a new direction.
Process flow chart is shown in Figure of description 1.
The content of the invention
The present invention is to utilize Pb-Zn tailings, Aggregate of recycled concrete and a kind of steam-pressing brisk of lime production.Raw materials for production are simple
It is easy to get, production technology simplicity is understandable, and its main purpose is the comprehensive profit for industrial residue Pb-Zn tailings and Aggregate of recycled concrete
With one new thinking of offer.
The present invention's comprises the following steps that：
1. Pb-Zn tailings are carried out sieve classification in hydrocyclone, fine fraction product of skimming, coarse fraction product is made
For brick-making raw material, and make its clay content<5%, -0.074mm content account for 85%.
2. Aggregate of recycled concrete is crushed most 5-10mm with jaw crusher, then particle is rinsed to containing mud
Amount<5%
3. lime is carried out single stage crushing in double-roll crusher, it is 1mm to be crushed to fineness, the thing that then will have been crushed
Material is put in dry grinding to -0.074mm contents in ball mill and accounts for 85%.
4. ready material in steps 1 and 2,3 is added to the water of its siccative gross mass 8-12%, in machine,massing
10min is stirred, it is fully mixed.2h is stood, carries out the stirring of secondary plus water, secondary amount of water is 2%, and mixing time is
5min.Mixed mixture is pressed into the adobe of 240mm × 115mm × 53mm, briquetting pressure 20KN.Then will suppress
Adobe be sent into still kettle in carry out steam pressure, autoclaved condition is：Heat up 2h, constant temperature 6h (maximum pressure 1.25MPa, temperature 185
DEG C), cool down 3h.Go out kettle after cooling.
Embodiment
Embodiment 1：
1. Pb-Zn tailings are carried out sieve classification in hydrocyclone, fine fraction product of skimming, coarse fraction product is made
For brick-making raw material, and make its clay content<5%, -0.074mm content account for 85%.；Aggregate of recycled concrete is broken with crusher
5-7mm is broken to, then particle is rinsed to clay content<5%；Quick lime is crushed to 1mm in double-roll crusher, then
It is accounted for 85% as dry grinding to -0.074mm contents in ball mill.
2. the Pb-Zn tailings that step 1 is prepared, Aggregate of recycled concrete and lime are according to siccative mass percent lead zinc tail
After mixing, the water for adding siccative gross weight 8% is fully stirred for ore deposit 55%, Aggregate of recycled concrete 30%, lime 15%
Mix, mixing time is 10 minutes.The stirring of secondary plus water is carried out after standing 2h, secondary amount of water is the 2% of siccative gross weight, is stirred
Time is 5min.
3. the slurry stirred evenly in step 2 is poured into a mould, then suppressed, pressing pressure 20KN.Will pressure
Make molding adobe and be put into still kettle and conserve.Autoclaved condition is：Heat up 2h, and (maximum pressure 1.25MPa, temperature are constant temperature 6h
185 DEG C), cool down 3h.Go out kettle after cooling.
The performance indicator of the steam-pressing brisk prepared by above-mentioned steps is as shown in table 1.
Steam-pressing brisk performance indicator prepared by 1 embodiment 1 of table
Embodiment 2：
1. Pb-Zn tailings are carried out sieve classification in hydrocyclone, fine fraction product of skimming, coarse fraction product is made
For brick-making raw material, and make its clay content<5%, -0.074mm content account for 85%.；Aggregate of recycled concrete is broken with crusher
7-10mm is broken to, then particle is rinsed to clay content<5%；Quick lime is crushed to 1mm in double-roll crusher, then
It is accounted for 85% as dry grinding to -0.074mm contents in ball mill.
2. the Pb-Zn tailings that step 1 is prepared, Aggregate of recycled concrete and lime are according to mass percent Pb-Zn tailings
60%th, after mixing, the water for adding siccative gross weight 9% is sufficiently stirred for Aggregate of recycled concrete 25%, lime 15%,
Mixing time is 10 minutes.Stand and the stirring of secondary plus water is carried out after 2h, secondary amount of water is the 2% of siccative gross weight, during stirring
Between be 5min.
3. the slurry stirred evenly in step 2 is poured into a mould, then suppressed, pressing pressure 20KN.Will pressure
Make molding adobe and be put into still kettle and conserve.Autoclaved condition is：Heat up 2h, and (maximum pressure 1.25MPa, temperature are constant temperature 6h
185 DEG C), cool down 3h.Go out kettle after cooling.
The performance indicator of the autoclaved lime-sand brick prepared by above-mentioned steps is as shown in table 2.
Steam-pressing brisk performance indicator prepared by 2 embodiment 2 of table
Embodiment 3：
1. Pb-Zn tailings are carried out sieve classification in hydrocyclone, fine fraction product of skimming, coarse fraction product is made
For brick-making raw material, and make its clay content<5%, -0.074mm content account for 85%.；Aggregate of recycled concrete is broken with crusher
5-10mm is broken to, then particle is rinsed to clay content<5%；Quick lime is crushed to 1mm in double-roll crusher, then
It is accounted for 85% as dry grinding to -0.074mm contents in ball mill.
2. the Pb-Zn tailings that step 1 is prepared, Aggregate of recycled concrete and lime are according to mass percent Pb-Zn tailings
65%th, after mixing, the water for adding siccative gross weight 10% is fully stirred for Aggregate of recycled concrete 20%, lime 15%
Mix, mixing time is 10 minutes.The stirring of secondary plus water is carried out after standing 2h, secondary amount of water is the 2% of siccative gross weight, is stirred
Time is 5min.
3. the slurry stirred evenly in step 2 is poured into a mould, then suppressed, pressing pressure 20KN.Will pressure
Make molding adobe and be put into still kettle and conserve.Autoclaved condition is：Heat up 2h, constant temperature 6h (maximum pressure 1.25MPa, temperature is
185 DEG C), cool down 3h.Go out kettle after cooling.The performance indicator of the autoclaved lime-sand brick prepared by above-mentioned steps is as shown in table 3.
Steam-pressing brisk performance indicator prepared by 3 embodiment 3 of table
Embodiment 4：
1. Pb-Zn tailings are carried out sieve classification in hydrocyclone, fine fraction product of skimming, coarse fraction product is made
For brick-making raw material, and make its clay content<5%, -0.074mm content account for 85%.；Aggregate of recycled concrete is broken with crusher
6-8mm is broken to, then particle is rinsed to clay content<5%；Quick lime is crushed to 1mm in double-roll crusher, then will
It accounts for 85% as dry grinding to -0.074mm contents in ball mill.
2. the Pb-Zn tailings that step 1 is prepared, Aggregate of recycled concrete and lime are according to mass percent Pb-Zn tailings
70%th, after mixing, the water for adding siccative gross weight 11% is fully stirred for Aggregate of recycled concrete 15%, lime 15%
Mix, mixing time is 10 minutes.The stirring of secondary plus water is carried out after standing 2h, secondary amount of water is the 2% of siccative gross weight, is stirred
Time is 5min.
3. the slurry stirred evenly in step 2 is poured into a mould, then suppressed, pressing pressure 20KN.Will pressure
Make molding adobe and be put into still kettle and conserve.Autoclaved condition is：Heat up 2h, and (maximum pressure 1.25MPa, temperature are constant temperature 6h
185 DEG C), cool down 3h.Go out kettle after cooling.
The performance indicator of the autoclaved lime-sand brick prepared by above-mentioned steps is as shown in table 4.
Steam-pressing brisk performance indicator prepared by 4 embodiment 4 of table
Embodiment 5：
1. Pb-Zn tailings are carried out sieve classification in hydrocyclone, fine fraction product of skimming, coarse fraction product is made
For brick-making raw material, and make its clay content<5%, -0.074mm content account for 85%.；Aggregate of recycled concrete is broken with crusher
6-10mm is broken to, then particle is rinsed to clay content<5%；Quick lime is crushed to 1mm in double-roll crusher, then
It is accounted for 85% as dry grinding to -0.074mm contents in ball mill.
2. the Pb-Zn tailings that step 1 is prepared, Aggregate of recycled concrete and lime are according to mass percent Pb-Zn tailings
75%th, after mixing, the water for adding siccative gross weight 12% is fully stirred for Aggregate of recycled concrete 10%, lime 15%
Mix, mixing time is 10 minutes.The stirring of secondary plus water is carried out after standing 2h, secondary amount of water is the 2% of siccative gross weight, is stirred
Time is 5min.
3. the slurry stirred evenly in step 2 is poured into a mould, then suppressed, pressing pressure 20KN.Will pressure
Make molding adobe and be put into still kettle and conserve.Autoclaved condition is：Heat up 2h, and (maximum pressure 1.25MPa, temperature are constant temperature 6h
185 DEG C), cool down 3h.Go out kettle after cooling.
The performance indicator of the autoclaved lime-sand brick prepared by above-mentioned steps is as shown in table 5.
Steam-pressing brisk performance indicator prepared by 5 embodiment 5 of table
Embodiment 6：
1. Pb-Zn tailings are carried out sieve classification in hydrocyclone, fine fraction product of skimming, coarse fraction product is made
For brick-making raw material, and make its clay content<5%, -0.074mm content account for 85%.；Aggregate of recycled concrete is broken with crusher
6-9mm is broken to, then particle is rinsed to clay content<5%；Quick lime is crushed to 1mm in double-roll crusher, then will
It accounts for 85% as dry grinding to -0.074mm contents in ball mill.
2. the Pb-Zn tailings that step 1 is prepared, Aggregate of recycled concrete and lime are according to mass percent Pb-Zn tailings
80%th, after mixing, the water for adding siccative gross weight 12% is fully stirred for Aggregate of recycled concrete 5%, lime 15%
Mix, mixing time is 10 minutes.The stirring of secondary plus water is carried out after standing 2h, secondary amount of water is the 2% of siccative gross weight, is stirred
Time is 5min.
3. the slurry stirred evenly in step 2 is poured into a mould, then suppressed, pressing pressure 20KN.Will pressure
Make molding adobe and be put into still kettle and conserve.Autoclaved condition is：Heat up 2h, and (maximum pressure 1.25MPa, temperature are constant temperature 6h
185 DEG C), cool down 3h.Go out kettle after cooling.
The performance indicator of the autoclaved lime-sand brick prepared by above-mentioned steps is as shown in table 5.
Steam-pressing brisk performance indicator prepared by 6 embodiment 6 of table
Claims (1)
1. a kind of method that steam-pressing brisk is prepared using Pb-Zn tailings and Aggregate of recycled concrete, its characterization step are as follows：
(1) Pb-Zn tailings are subjected to sieve classification in hydrocyclone, fine fraction product of skimming, using coarse fraction product as system
Brick raw material, and make its clay content ＜ 5%, -0.074mm contents account for 85%；
(2) quick lime is crushed to 1.0mm in double-roll crusher, then by it as dry grinding in ball mill to -0.074mm contents
Account for 85%；
(3) by Aggregate of recycled concrete crusher in crushing to 6-10mm, then particle is rinsed to clay content ＜ 5%；
(4) by the raw material obtained in steps 1 and 2,3 according to quality than Pb-Zn tailings 75%, Aggregate of recycled concrete 10%, raw stone
Ash 15% mixes, and the water for adding siccative total amount 12% is stirred, mixing time 10min；Secondary add is carried out after standing 2h
Water stirs, and secondary amount of water is the 2% of siccative gross weight, mixing time 5min；Carry out again into mould, compacting, steam pressure program, so
After go out kettle standing；Pressing pressure is 20KN, and autoclaved condition is：Heat up 2h, constant temperature 6h, and cool down 3h；During constant temperature：Pressure 1.25MPa,
Temperature is 185 DEG C；
The Pb-Zn tailings used, wherein mineral composition are by percentage to the quality：SiO240%~70%；Al2O31%~15%；
Fe2O35%~15%；P2O50.01%~3%；MgO0.1%~10%；CaO10%~25%；K2O0.1%~5%；
Na2O0.1%~5%；Loss on ignition 0.1%~3%, other 0.01%~1%；
The Aggregate of recycled concrete used, wherein mineral composition are by percentage to the quality：SiO220%~40%；
Al2O30.1%~10%；Fe2O30.1%~10%；SO20.1%~10%；MgO0.1%~10%；CaO20%~50%；
Other 5%~20%.
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| CN201410155278.6A CN104876519B (en) | 2014-04-17 | 2014-04-17 | A kind of Pb-Zn tailings and Aggregate of recycled concrete prepare autoclaved lime-sand brick method |
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| CN104876519B true CN104876519B (en) | 2018-05-15 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495623B (en) * | 2016-10-18 | 2019-05-10 | 河北工程大学 | A method of steam-pressing brisk is prepared using molybdic tailing |
| CN106478034A (en) * | 2016-10-18 | 2017-03-08 | 河北工程大学 | A kind of method preparing autoclaved lime-sand brick using Pb-Zn tailings curing heavy metal |
| CN108689721A (en) * | 2018-06-14 | 2018-10-23 | 张可池 | A kind of Pb-Zn tailings powder air entrained concrete of carbon fiber-containing and preparation method thereof |
| CN108911686A (en) * | 2018-09-29 | 2018-11-30 | 佛山科学技术学院 | A kind of construction garbage brick method |
| CN112408898A (en) * | 2020-11-26 | 2021-02-26 | 华新水泥股份有限公司 | Process for producing baking-free type filter-pressing soil tailing bricks through cogeneration and co-maintenance of cement plant |
| CN114105543B (en) * | 2021-12-21 | 2022-10-11 | 邯郸市建业建设工程质量检测有限公司 | Preparation method of all-solid waste foam concrete |
| CN115026925B (en) * | 2022-06-29 | 2023-03-24 | 淄博天之润生态科技有限公司 | Method for manufacturing rare earth tailing dry-pressed brick |
| CN117069451B (en) * | 2023-08-17 | 2024-05-28 | 重庆大学溧阳智慧城市研究院 | Method for preparing high-strength 3D printed concrete based on modified antimony tailings |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101921095A (en) * | 2010-08-23 | 2010-12-22 | 马鞍山科达机电有限公司 | Environment-friendly high-strength construction waste autoclaved brick and production method thereof |
| CN103058618A (en) * | 2012-12-21 | 2013-04-24 | 江苏华东尾矿治理工程有限公司 | Method of manufacturing silicate bricks with lead-and-zinc tailings |
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- 2014-04-17 CN CN201410155278.6A patent/CN104876519B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101921095A (en) * | 2010-08-23 | 2010-12-22 | 马鞍山科达机电有限公司 | Environment-friendly high-strength construction waste autoclaved brick and production method thereof |
| CN103058618A (en) * | 2012-12-21 | 2013-04-24 | 江苏华东尾矿治理工程有限公司 | Method of manufacturing silicate bricks with lead-and-zinc tailings |
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