CN104607434B - One way of life incineration of refuse flyash curing - Google Patents
One way of life incineration of refuse flyash curing Download PDFInfo
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- CN104607434B CN104607434B CN201510070925.8A CN201510070925A CN104607434B CN 104607434 B CN104607434 B CN 104607434B CN 201510070925 A CN201510070925 A CN 201510070925A CN 104607434 B CN104607434 B CN 104607434B
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- incineration
- firming body
- refuse flyash
- strontium carbonate
- waste slag
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Abstract
The invention discloses one way of life incineration of refuse flyash curing, by incineration of refuse flyash, strontium carbonate waste slag, potash and cement by mass parts 40-50: 25-38: 3-6: 15-25 mixing, add after appropriate amount of purified water stirs again, insert extruding in forming model to tamp, then be positioned over the demoulding after 24 hours in air, obtain firming body base substrate; Firming body base substrate carries out that maintenance can obtain again can the firming body of direct landfill, and curing time is not less than 14d.Strontium carbonate waste slag of the present invention, as the important source material of solidification flying dust, makes cement consumption greatly reduce, thus achieves twice laid, also reduces incineration of refuse flyash solidification cost simultaneously.Firming body compression strength of the present invention and Leaching of Heavy Metals meet landfill needs completely.
Description
Technical field
The present invention relates to innoxious process for treating house garbage, specifically refer to one way of life incineration of refuse flyash curing, belong to rubbish solidification processing technology field.
Background technology
Because incineration of refuse flyash contains the hazard component such as heavy metal and organic pollution (as dioxin), listed in Hazardous Waste List by country, therefore must carry out harmless treatment before carrying out security landfill and utilization.The main problem considering two aspects of domestic garbage incineration flyash solidification process: one is that firming body will have certain compression strength, the environmental risk causing harmful element to leach to reduce firming body to destroy; Two be harmful element in firming body leaching concentration meet " consumer waste filling and embedding Environmental capacity standard " (GB16889-2008) admissions criteria, environment is not impacted.Cement stabilizing/curing technology, chemical agent stabilisation are the preprocess methods the most often used at present.Chemical agent is stable then passes through chemical reaction, poisonous and harmful substance is made to change the process of dissolubility, low migration and hypotoxicity material into, discarded object increase-volume after process is very little, but it is poor to the adaptive capacity of environment acidity change, molten leaching phenomenon can be there is in the heavy metal in discarded object because of drip washing, produce secondary pollution, and cost is higher.Cement solidification is easy to get because it has material, treatment effect is good, has become the preprocess method of the flying ash final disposal more generally adopted in the world, but the too many energy of manufacture of cement consumption and resource.Therefore, industrial residue substitutes cement is the developing direction that a kind of changing waste into resources utilizes.
Summary of the invention
For prior art above shortcomings, the object of this invention is to provide one way of life incineration of refuse flyash curing, this curing can obviously reduce solidification cost, and in firming body, each Heavy Metals Steep cencentration can reduce greatly.
Technical scheme of the present invention is achieved in that
One way of life incineration of refuse flyash curing, by incineration of refuse flyash, strontium carbonate waste slag, potash and cement by mass parts 40-50: 25-38: 3-6: 15-25 mixing, add after appropriate amount of purified water stirs again, insert extruding in forming model to tamp, then be positioned over the demoulding after 24 hours in air, obtain firming body base substrate; Firming body base substrate carries out that maintenance can obtain again can the firming body of direct landfill, and curing time is not less than 14d.
The addition of described pure water is the 40-45% of incineration of refuse flyash, strontium carbonate waste slag, potash and cement gross mass.
Described incineration of refuse flyash and strontium carbonate waste slag carry out pretreatment before combination, and pretreatment is that incineration of refuse flyash and strontium carbonate waste slag are crossed the accurate sub-sieve of 100 target respectively, then dries in an oven.
The bake out temperature of described baking oven is 105 DEG C, and drying time is 24 hours.
Compared to existing technology, the present invention has following beneficial effect:
The waste residue of generation during 1, the present invention utilizes strontium carbonate to produce, it is by celestite ore (SrSO
4) or water chestnut strontium (SrCO
3) waste residue after roasting-leaching slurries, main component is strontium carbonate, the strontium silicate of roasting process, and the strontium sulfate be not reduced.At present the disposal and utilization of strontium carbonate waste slag is mainly pave the way, cement constructional material etc.Strontium carbonate waste slag, as the important source material of solidification flying dust, makes cement consumption greatly reduce, thus achieves twice laid, also reduces incineration of refuse flyash solidification cost simultaneously.
2, the firming body compression strength that this method obtains shows: the increase of intensity curing time and obviously increasing, and minimum compression strength is all greater than 0.5MPa, and maximum compressive strength can reach 2.44MPa.Therefore, firming body compression strength of the present invention meets landfill needs completely.
3, the firming body Leaching Heavy Metals test that this method obtains shows, in firming body, the leaching concentration of Cu, Cr is far below consumer waste filling and embedding Environmental capacity standard Steep cencentration limit value; The leaching concentration of Zn, Hg is within concentration limit scope, and wherein the leaching concentration of Hg when curing time is 3d meets standard-required.
Detailed description of the invention
Domestic garbage incineration flyash curing of the present invention, by mass parts 40-50: 25-38: 3-6: 15-25 mixing by incineration of refuse flyash, strontium carbonate waste slag, potash and cement, add after appropriate amount of purified water stirs again, insert extruding in forming model to tamp, then be positioned over the demoulding after 24 hours in air, obtain firming body base substrate; Firming body base substrate carries out that maintenance can obtain again can the firming body of direct landfill, and curing time is not less than 14d.
Strontium slag is the product of 100-1200 ° of roasting, and strontium slag cannot be made to become molten condition, and thus the intensity of strontium carbonate waste slag is not high.But under alkaline assistant and water existence condition, the gelatinous mass as hydrated cementitious can be produced, form the cement matrix of high strength hyposmosis.Add appropriate potash and modification is carried out to strontium slag, increase its gel strength.Strontium carbonate waste slag, potash and cement matrix provide the higher alkaline environment of pH value, then heavy metal is combined into the salt of calcic with OH or silicate, is adsorbed on the C-S-H particle of high-specific surface area, enters in crystal structure, reach the object controlling Leaching of Heavy Metals.
The addition of described pure water is the 40-45% of incineration of refuse flyash, strontium carbonate waste slag, potash and cement gross mass.
Described incineration of refuse flyash and strontium carbonate waste slag carry out pretreatment before combination, and pretreatment is that incineration of refuse flyash and strontium carbonate waste slag are crossed the accurate sub-sieve of 100 target respectively, then dries in an oven.The bake out temperature of described baking oven is 105 DEG C, and drying time is 24 hours.
Below in conjunction with specific embodiment, the present invention is described in further detail.
Weigh the quality of each reagent according to the solidification scheme of following table 1, add after pure water stirs, insert in stainless steel and iron simulation, extruding is tamped.Be positioned over the demoulding after 24 hours in air, obtain firming body base substrate.
Table 1 flyash curing scheme proportioning
| Group number | Strontium carbonate waste slag (%) | Potash (%) | Flying dust (%) | Cement (%) |
| 1* | 34.8 | 5.2 | 40 | 20 |
| 2* | 26.1 | 3.9 | 50 | 20 |
The firming body base substrate respectively two embodiments obtained curing time be 3,7,14,28d time, test compression strength.Often organize experimental data and at least survey 3 samples, average.Firming body after test compression strength, immerses in absolute ethyl alcohol and prevents the continuation of hydration reaction from occurring, after firming body crushing drying, for the detection of Leaching.
Compression strength: result of study shows: when flying dust ratio increases, compression strength change is not obvious, but reduces gradually generally; The no matter sample of which kind of proportioning, its intensity all obviously increases with the increase of curing time.The compression strength of all experimental group is all greater than 0.5MPa, and during 28d, 1* sample occurs that maximum compressive strength is 2.44MPa.Therefore, single from the viewpoint of compression strength, firming body possesses certain intensity, can resist certain destruction, meet landfill needs completely.
Firming body Leaching Heavy Metals: firming body Leaching is in table 2.As shown in Table 2, in firming body the leaching concentration of Cu, Cr far below consumer waste filling and embedding Environmental capacity standard Steep cencentration limit value; The leaching concentration of Zn, Hg is within concentration limit scope, and wherein the leaching concentration of Hg when curing time is 3d meets standard-required.
The Leaching (mg/L) of table 2 flyash curing body
Note: GB16889-2008 is consumer waste filling and embedding Environmental capacity standard, and Cr is total chromium standard, and Cr VI leachate limit value is 1.5mg/L.
Firming body compression strength optimum proportioning of the present invention is: 20% cement, 34.8% strontium carbonate waste slag, 5.2% potash, 40% flying dust, when curing time is 28d, firming body compression strength reaches maximum, for 2.44Mpa, and compression strength increases along with the increase of curing time.
When curing time is 14d, experimental group 1*(cement 20%, strontium carbonate waste slag 34.8%, potash 5.2%, flying dust 40%) and 2*(cement 20%, strontium carbonate waste slag 26.1%, potash 3.9%, flying dust 50%) flyash curing body in each Heavy Metals Steep cencentration all lower than the limit value of regulation in consumer waste filling and embedding Environmental capacity standard (GB16889-2008).
Meet standard of landfill to reach flyash cement firming body, curing time must not lower than 14d.
Utilize maximization, compression strength and metal to leach from changing waste into resources to consider, the formula of the best of the present invention: cement 20%, strontium carbonate waste slag 26.1%, potash 3.9%, flying dust 50%; Water-solid ratio: 45:100.
Finally it should be noted that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although applicant's reference preferred embodiment is to invention has been detailed description, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is modified or equivalent replacement, and do not depart from aim and the scope of the technical program, all should be encompassed in the middle of right of the present invention.
Claims (3)
1. one way of life incineration of refuse flyash curing, it is characterized in that: by incineration of refuse flyash, strontium carbonate waste slag, potash and cement by mass parts 40-50: 25-38: 3-6: 15-25 mixing, add after appropriate amount of purified water stirs again, insert extruding in forming model to tamp, then be positioned over the demoulding after 24 hours in air, obtain firming body base substrate; Firming body base substrate carries out that maintenance can obtain again can the firming body of direct landfill, and curing time is not less than 14d;
The addition of described pure water is the 40-45% of incineration of refuse flyash, strontium carbonate waste slag, potash and cement gross mass.
2. domestic garbage incineration flyash curing according to claim 1, it is characterized in that, described incineration of refuse flyash and strontium carbonate waste slag carry out pretreatment before combination, pretreatment is that incineration of refuse flyash and strontium carbonate waste slag are crossed the accurate sub-sieve of 100 target respectively, then dries in an oven.
3. domestic garbage incineration flyash curing according to claim 2, is characterized in that, the bake out temperature of described baking oven is 105 DEG C, and drying time is 24 hours.
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| CN201510070925.8A CN104607434B (en) | 2015-02-10 | 2015-02-10 | One way of life incineration of refuse flyash curing |
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| CN105150581B (en) * | 2015-10-08 | 2017-05-24 | 同济大学 | Method for achieving stabilization of solidified fly ash and protogenous fly ash through static-pressure pressing |
| CN105693123B (en) * | 2016-03-10 | 2018-04-10 | 重庆三峰环境产业集团有限公司 | The method and its clean applications in bituminous paving that domestic garbage incineration flyash is granulated altogether with cement, silicon ash, flyash |
| CN105964652B (en) * | 2016-05-10 | 2019-06-07 | 苏州大学 | A kind of solidification and stabilization processing method for incineration of refuse flyash |
| CN109400042B (en) * | 2018-12-30 | 2022-10-11 | 江苏启坤循环经济产业技术开发有限公司 | Preparation method for producing standard brick by using activated fly ash solidified by industrial waste residues |
| CN112122301A (en) * | 2020-08-10 | 2020-12-25 | 郭革 | Single-magnetic stirring technology-based household garbage incineration fly ash solidification method |
| CN112934919B (en) * | 2021-02-05 | 2022-07-01 | 云南大地丰源环保有限公司 | Method for treating waste anhydrous aluminum chloride |
| CN113402217B (en) * | 2021-05-28 | 2022-11-01 | 合肥学院 | Waste incineration power generation fly ash solidification method |
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| SU1335545A1 (en) * | 1985-01-07 | 1987-09-07 | Всесоюзный научно-исследовательский институт горноспасательного дела | Binder composition |
| DE4433275A1 (en) * | 1994-09-19 | 1996-03-28 | Solvay Barium Strontium Gmbh | Immobilising strontium and barium ions in sludge from sulphide leaching plants |
| JP3949795B2 (en) * | 1997-10-17 | 2007-07-25 | 日本曹達株式会社 | Special fly ash treatment method |
| CN101531492B (en) * | 2009-04-17 | 2012-01-04 | 上海应用技术学院 | Method for preparing light concrete by municipal solid waste incineration fly ash |
| CN102218428A (en) * | 2011-01-20 | 2011-10-19 | 杭州大地环保有限公司 | Treatment method of arsenic slag |
| CN104446182A (en) * | 2014-11-05 | 2015-03-25 | 高路恒 | Light energy-saving type concrete block |
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Inventor after: Wang Liao Inventor after: Li Xiaofan Inventor after: Huang Chuan Inventor after: Zhang Hongliang Inventor after: Xu Tengtun Inventor after: Wang Lei Inventor before: Wang Liao Inventor before: Zhang Hongliang Inventor before: Huang Chuan Inventor before: Li Xiaofan Inventor before: Xu Tengtun Inventor before: Wang Lei |
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