CN104193248B - A kind of method utilizing concrete mixing plant scrap grout to prepare baking-free ceramicite - Google Patents
A kind of method utilizing concrete mixing plant scrap grout to prepare baking-free ceramicite Download PDFInfo
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- CN104193248B CN104193248B CN201410432978.5A CN201410432978A CN104193248B CN 104193248 B CN104193248 B CN 104193248B CN 201410432978 A CN201410432978 A CN 201410432978A CN 104193248 B CN104193248 B CN 104193248B
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- grout
- scrap
- haydite
- baking
- free ceramicite
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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
Abstract
The invention discloses a kind of method utilizing concrete mixing plant scrap grout to prepare baking-free ceramicite, in turn include the following steps: (1) raw material premix: get following component by weight percentage and mix: cement 5 ~ 15%, flyash 62%, scrap grout powder 15 ~ 25%, binding agent 4 ~ 6%, pore former 2 ~ 4%; (2) extrusion molding: become by the material extruding after mixing particle diameter to be the particle of 2 ~ 4mm; (3) granulation balling-up: the particle after extrusion molding is made haydite, is controlled to spherolite footpath at 5mm ~ 10mm; (4) ageing: haydite is at room temperature left standstill 22 ~ 24h; (5) maintenance: the haydite dry ageing in 60 DEG C of baking ovens after, to haydite autoclaved maintenance, namely obtains baking-free ceramicite finished product after maintenance.The method carries out effective recycling to concrete mixing plant scrap grout, economic environmental protection.The baking-free ceramicite quality obtained is high, can Application Areas extensive.
Description
Technical field
The present invention relates to baking-free ceramicite preparing technical field, particularly a kind of method utilizing concrete mixing plant scrap grout to prepare baking-free ceramicite.
Background technology
Haydite has the performance of many excellences, and as little in density, quality is light, have good resistivity against fire and shock resistance etc., is therefore widely used in the fields such as building materials, gardening, food-drink, flame-proof thermal insulation material, chemical industry, oil.
In western countries, the production of haydite is very general with application.Foreign market is very large to the demand of light-weight aggregate, the especially Asian-Pacific area.Since the nineties, haydite grows up in China, its produce and application prospect fine, see on the whole, China's haydite industry goes on regular road for development substantially, but still there is the problem of several respects compared with abroad: the general technical that (1) haydite is produced and state of art are still in backward status, compared with advanced country, have a long way to go, as still adopted traditional sintering process to produce haydite.(2) on ceramic product, leca and haydites of book structure are still occupied an leading position.(3) use of haydite is unreasonable, and Application Areas is little, and promotion rate is slow, and economic benefit can not get embodying.
If publication number is that the one disclosed in the patent application of CN103951327A discards vitrified brick powder baking-free ceramicite and preparation method, take glass powder as alkali-activated carbonatite component, excite the activity of discarded vitrified brick powder and red mud to provide haydite intensity by vapor cure, and with discarded granular polystyrene particle for stopping composition, make ceramsite concrete light-weight, finally obtain baking-free ceramicite, this technique reaches the production requirement of energy-conserving and environment-protective to a certain extent.But this technique also also exists following defect: 1, the interpolation of the admixture such as additional alkaline excitation component and granular polystyrene lighting component increases raw materials cost, and admixture means in raw material doping longer with the time of needs when mixing more, make Production Flow Chart become tediously long, reduce production efficiency; 2, ceramic product intensity is poor, only has about 2.8MPa, and application limitation is larger.
In recent years, premixed concrete industry fast development is got up, but the blowdown situation of stirring station is still serious.The pollutent mainly scrap grout of Of Concrete Mixing Station, it derives from the waste material of concrete after sand-stone separator is separated wasted in production process, scrubs sewage and the throw out of transport mixer and facilities of mix storied building.The main component of this kind of scrap grout is cement-hydrate C-S-H gel, ettringite, alkaline matter, fine sand, the mixture of the more complicated of admixture and unreacted adulterant etc.According to Investigation on Data display, often produce 1000m
3concrete will produce 12m
3scrap grout, according to annual 700000 m of stirring station
3amount of concrete calculates, and within 1 year, produces about 8400m
3scrap grout, these scrap grouts precipitation after need tract to stack, destroy ecotope, pollute, and administer these scrap grouts precipitation rubbish need a large sum of processing costs.If these scrap grouts reasonably can be used, be not only beneficial to environmental protection, save energy, enterprise also can produce certain economic benefit, and this has positive realistic meaning at society.And how to utilize concrete mixing plant scrap grout to prepare high-quality baking-free ceramicite at present, yet there are no report in the prior art.
Summary of the invention
The object of this invention is to provide a kind of method utilizing concrete mixing plant scrap grout to prepare baking-free ceramicite, the raw material type that the method adopts is few, not containing additional alkaline excitation component and lighting component, production cost and operation are saved, and effective recycling is carried out for concrete mixing plant scrap grout, economic environmental protection.The baking-free ceramicite quality obtained is high, can Application Areas extensive.
To achieve these goals, a kind of method utilizing concrete mixing plant scrap grout to prepare baking-free ceramicite provided by the invention, in turn includes the following steps:
(1) raw material premix: get following component by weight percentage: cement 5 ~ 15%, flyash 62%, scrap grout powder 15 ~ 25%, binding agent 4 ~ 6%, pore former 2 ~ 4%, stir after described cement, flyash, scrap grout powder, pore former mixing, add described binding agent again in the process of stirring, until discharging after stirring into stable homogeneous system;
(2) extrusion molding: the raw material after mixing is sent in extrusion machine and is squeezed into the particle that particle diameter is 2 ~ 4mm;
(3) granulation balling-up: the particle after extrusion molding is sent in nodulizer and makes haydite, be controlled to spherolite footpath at 5mm ~ 10mm;
(4) ageing: the haydite obtained in nodulizer is at room temperature left standstill 22 ~ 24h;
(5) maintenance: the haydite dry ageing in 60 DEG C of baking ovens after, then uses steam pressure pressurized vessel to haydite autoclaved maintenance, and curing temperature is 100 DEG C, and curing time is 8h-10h, namely obtains baking-free ceramicite finished product after maintenance completes.
Described scrap grout powder is by sewage-mud throw out accumulative in concrete mixing plant through natural air drying, rough levigate rear obtained scrap grout meal.
While stirring after each component mixing, also add water in step (1), the quality sum of each component and the mass ratio of water are 100:45.
Preferably, described binding agent is water glass.
Preferably, described pore former is PEG.
Described scrap grout powder is by sewage-mud throw out accumulative in concrete mixing plant through natural air drying, crosses 0.15mm and sieve the meal obtained after rough mill.
A kind of method utilizing concrete mixing plant scrap grout to prepare baking-free ceramicite provided by the invention, has following beneficial effect:
(1) will the scrap grout throw out Collection utilization in addition of problem of environmental pollution be caused, turn waste into wealth.
(2) each component compatibility proportioning is scientific and reasonable, mutually works in coordination with between component, and the activity of flyash can well be excited, thus makes haydite intensity improve, so do not need in the present invention to add exciting agent in addition, cost is reduced further.
(3) obtained haydite density is low and specific surface area large, porous, and its specific surface area is 2-3 times of ordinary ceramsite, has obvious advantage in water treatment applications.
(4) gained haydite has good cylindrical compress strength, reaches as high as 5.2MPa, is obviously better than the 4.0MPa of national Specification.
(5) product process flow controllability is high, as can be controlled the size of balling-up by the revolution of the sieve aperture and pan-pelletizer of changing extrusion machine.
Accompanying drawing explanation
Fig. 1 is a kind of process flow sheet utilizing concrete mixing plant scrap grout to prepare the method for baking-free ceramicite provided by the present invention.
Embodiment
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
A kind of technical process utilizing concrete mixing plant scrap grout to prepare baking-free ceramicite provided by the invention as shown in Figure 1.
The scrap grout powder adopted in various embodiments of the present invention is by sewage-mud throw out accumulative in concrete mixing plant through natural air drying, the rough levigate rear scrap grout meal crossed 0.15mm sieve series and obtain, and its main component is as shown in table 1 below:
Embodiment 1
(1) raw material premix: get following component by weight percentage: cement 5%, flyash 62%, scrap grout powder 25%, water glass 4%, PEG4%, stirs after cement, flyash, scrap grout powder, pore former mixing, adds binding agent and water in the process of stirring, every 100g raw material adds 45g water and stirs, until discharging after stirring into stable homogeneous system;
(2) extrusion molding: the raw material after mixing is sent in extrusion machine and is squeezed into the particle that particle diameter is 3mm;
(3) granulation balling-up: the particle after extrusion molding is sent in nodulizer and makes haydite, be controlled to spherolite footpath at 5mm ~ 10mm;
(4) ageing: the haydite obtained in nodulizer is at room temperature left standstill 24h;
(5) maintenance: the haydite dry ageing in 60 DEG C of baking ovens after, then uses steam pressure pressurized vessel to haydite autoclaved maintenance, and curing temperature is 100 DEG C, and curing time is 8h-10h, namely obtains baking-free ceramicite finished product after maintenance completes.
Embodiment 2
(1) raw material premix: get following component by weight percentage: cement 10%, flyash 62%, scrap grout powder 20%, water glass 5%, PEG3%, stirs after cement, flyash, scrap grout powder, pore former mixing, adds binding agent and water in the process of stirring, every 100g raw material adds 45g water and stirs, until discharging after stirring into stable homogeneous system;
(2) extrusion molding: the raw material after mixing is sent in extrusion machine and is squeezed into the particle that particle diameter is 3mm;
(3) granulation balling-up: the particle after extrusion molding is sent in nodulizer and makes haydite, be controlled to spherolite footpath at 5mm ~ 10mm;
(4) ageing: the haydite obtained in nodulizer is at room temperature left standstill 24h;
(5) maintenance: the haydite dry ageing in 60 DEG C of baking ovens after, then uses steam pressure pressurized vessel to haydite autoclaved maintenance, and curing temperature is 100 DEG C, and curing time is 8h-10h, namely obtains baking-free ceramicite finished product after maintenance completes.
Embodiment 3
(1) raw material premix: get following component by weight percentage: cement 15%, flyash 62%, scrap grout powder 15%, water glass 6%, PEG2%, stirs after cement, flyash, scrap grout powder, pore former mixing, adds binding agent and water in the process of stirring, every 100g raw material adds 45g water and stirs, until discharging after stirring into stable homogeneous system;
(2) extrusion molding: the raw material after mixing is sent in extrusion machine and is squeezed into the particle that particle diameter is 3mm;
(3) granulation balling-up: the particle after extrusion molding is sent in nodulizer and makes haydite, be controlled to spherolite footpath at 5mm ~ 10mm;
(4) ageing: the haydite obtained in nodulizer is at room temperature left standstill 24h;
(5) maintenance: the haydite dry ageing in 60 DEG C of baking ovens after, then uses steam pressure pressurized vessel to haydite autoclaved maintenance, and curing temperature is 100 DEG C, and curing time is 8h-10h, namely obtains baking-free ceramicite finished product after maintenance completes.
Test example 1
Measure the performance index such as tap density, specific surface area, porosity, cylindrical compress strength of the baking-free ceramicite that embodiment 1-3 provides, concrete measurement result sees the following form 2:
The salient features of table 2 haydite
Above a kind of method utilizing concrete mixing plant scrap grout to prepare baking-free ceramicite provided by the present invention is described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands core concept of the present invention for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (3)
1. utilize concrete mixing plant scrap grout to prepare a method for baking-free ceramicite, it is characterized in that, in turn include the following steps:
(1) raw material premix: get following component by weight percentage: cement 5 ~ 15%, flyash 62%, scrap grout powder 15 ~ 25%, binding agent 4 ~ 6%, pore former 2 ~ 4%, stir after described cement, flyash, scrap grout powder, pore former mixing, add described binding agent again in the process of stirring, until discharging after stirring into stable homogeneous system;
(2) extrusion molding: the raw material after mixing is sent in extrusion machine and is squeezed into the particle that particle diameter is 2 ~ 4mm;
(3) granulation balling-up: the particle after extrusion molding is sent in nodulizer and makes haydite, be controlled to spherolite footpath at 5mm ~ 10mm;
(4) ageing: the haydite obtained in nodulizer is at room temperature left standstill 22 ~ 24h;
(5) maintenance: the haydite dry ageing in 60 DEG C of baking ovens after, then uses steam pressure pressurized vessel to haydite autoclaved maintenance, and curing temperature is 100 DEG C, and curing time is 8h-10h, namely obtains baking-free ceramicite finished product after maintenance completes;
Wherein, while stirring after each component mixing, also add water in step (1), the quality sum of each component and the mass ratio of water are 100:45;
Wherein, described scrap grout powder is by sewage-mud throw out accumulative in concrete mixing plant through natural air drying, crosses 0.15mm and sieve the meal obtained after rough mill.
2. the method utilizing concrete mixing plant scrap grout to prepare baking-free ceramicite according to claim 1, is characterized in that, described binding agent is water glass.
3. the method utilizing concrete mixing plant scrap grout to prepare baking-free ceramicite according to claim 1, is characterized in that, described pore former is PEG.
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| CN104193248B true CN104193248B (en) | 2015-12-02 |
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| CN104692686A (en) * | 2015-03-13 | 2015-06-10 | 宁夏大学 | High-performance autoclaved shell haydite prepared from calcium carbide mud residue and preparation method thereof |
| CN112851166B (en) * | 2020-12-31 | 2022-03-25 | 苏州中材非金属矿工业设计研究院有限公司 | Method for preparing high-strength baking-free ceramsite by adopting mine stripping soil |
| CN114044641A (en) * | 2021-11-16 | 2022-02-15 | 大连理工大学 | Extrusion-molded aggregate using yellow river silt as raw material and preparation method thereof |
Citations (4)
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|---|---|---|---|---|
| JP3715669B2 (en) * | 1995-01-25 | 2005-11-09 | 積水化学工業株式会社 | Inorganic hardened material used for air purification under ultraviolet irradiation |
| CN102424599A (en) * | 2011-08-31 | 2012-04-25 | 南京理工大学 | Method for preparing silicate ceramic pellets by using waste aeroconcrete building blocks |
| CN102617107A (en) * | 2012-04-01 | 2012-08-01 | 浙江大学宁波理工学院 | Building silt soil non-sintered ceramic aggregate and preparation method thereof |
| CN103951327A (en) * | 2014-04-09 | 2014-07-30 | 北京工业大学 | Waste sintered brick powder non-sintered ceramsite and preparation method |
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2014
- 2014-08-28 CN CN201410432978.5A patent/CN104193248B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3715669B2 (en) * | 1995-01-25 | 2005-11-09 | 積水化学工業株式会社 | Inorganic hardened material used for air purification under ultraviolet irradiation |
| CN102424599A (en) * | 2011-08-31 | 2012-04-25 | 南京理工大学 | Method for preparing silicate ceramic pellets by using waste aeroconcrete building blocks |
| CN102617107A (en) * | 2012-04-01 | 2012-08-01 | 浙江大学宁波理工学院 | Building silt soil non-sintered ceramic aggregate and preparation method thereof |
| CN103951327A (en) * | 2014-04-09 | 2014-07-30 | 北京工业大学 | Waste sintered brick powder non-sintered ceramsite and preparation method |
Non-Patent Citations (1)
| Title |
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| 新型免烧陶粒的制备及其对生活污水处理的研究;李猛;《中国优秀硕士论文全文数据库》;20120515;第12-15页 * |
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Denomination of invention: A method of preparing unfired ceramsite from waste mortar of concrete mixing plant Effective date of registration: 20210625 Granted publication date: 20151202 Pledgee: Haian Xinyuan rural small loan Co.,Ltd. Pledgor: NANTONG ZHONGRUN CONCRETE Co.,Ltd. Registration number: Y2021980005291 |
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