CN105363772B - A kind of contaminated soil consolidation renovation agent and preparation method - Google Patents
A kind of contaminated soil consolidation renovation agent and preparation method Download PDFInfo
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- CN105363772B CN105363772B CN201510824890.2A CN201510824890A CN105363772B CN 105363772 B CN105363772 B CN 105363772B CN 201510824890 A CN201510824890 A CN 201510824890A CN 105363772 B CN105363772 B CN 105363772B
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- slag
- iron ore
- pulverized powder
- ore tailings
- renovation agent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
Abstract
The invention discloses a kind of contaminated soil consolidation renovation agent and preparation method, it is made up of a certain proportion of purified silicious earth, hot splashing steel slag pulverized powder, iron ore tailings pulverized powder, slag micropowder, calcium oxide, triethanolamine, sodium formate, sodium chloride, and step is：A, slag, purified silicious earth and iron ore tailings are used into salt acid soak respectively, the slag after processing, diatomite and iron ore tailings is mixed, obtain mixture A；B, slag, diatomite and iron ore tailings are distinguished using ball mill levigate；C, slag micropowder, calcium oxide, triethanolamine, sodium formate and sodium chloride are mixed successively or arbitrarily, obtains mixture B；D, mixture A and mixture B is added into closing three axle mixers stirring, is mixed after overlay film packing, obtain a kind of soil consolidation renovation agent.It is formulated easy, easy to operate, high treating effect, production cost are low, do not cause the contaminated soil of secondary soil pollution to consolidate renovation agent.
Description
Technical field
The invention belongs to environmental protection technical field, is more particularly to one kind and relates to contaminated soil consolidation renovation agent, also simultaneously
It is related to a kind of preparation method for relating to contaminated soil consolidation renovation agent.
Background technology
With industry, the aggravation of municipal pollution and agrochemicals species, the increase of quantity, China's soil pollution is increasingly
Seriously.Pollution level is being aggravated, and area expands year by year.According to Ministry of Agriculture's environment monitoring system to national 24 provinces and cities, 320 tight
The soil investigation of about 5,480,000 hectares of seriously polluted area finds that crop field agricultural products pollute exceeded area and account for contaminated area farmland area
20%, wherein pollution accounts for 80%, the investigation of national grain is found, heavy metal Pb, Cd, Hg, As exceeding standard rates account for 10%.It is heavy metal-polluted
Thing poor mobility in soil, holdup time length are contaminated, most of microbe can not be allowed to degrade.And can be through media such as water, plants
Finally endanger human health.Using soil consolidation renovation agent can rapidly solidified waste particle, the fixed toxic heavy metal included
Ion, pathogeny body, Leaching is not exceeded, eliminates the hidden danger of harm, and clay manufacture walling, structure can be substituted after consolidating
Part, comprehensive utilization of resources, preserve the ecological environment with significant society, environment, economic benefit, be in recycling economy technical field
The industry of sustainable development.
It is used for the building waste micro mist consolidating agent of soil body solidification in the prior art, prepared by each component of its percentage by weight：
Building waste micro mist 30-70%；Desulfurated plaster 10-30%；Washing slurry 5-30%；Additive 1-5%, the weight of above each component
Percentage sum is 100%.The consolidating agent has the complete regeneration that can realize building waste, and fully excites brick and tile micro mist
Deng the activity of mineral admixture, realize that building waste is innoxious, minimizing, while also realize the full regenerated resources of building waste
The advantages of utilization.
But above-mentioned consolidating agent is not the consolidating agent used for the processing of sewage plant contaminated soil remediation, to handling municipal ring
The high liquid limit high humic acid sludge in border, particularly humic acid content are up to 70%, and moisture content is up to 80% stream modeling shape sludge, substantially
Failure.Therefore a kind of necessary applicability of exploitation is wide, and cost is cheap, contaminated soil easy to process consolidation renovation agent, with full
The demand of the domestic soil remediation work of foot.
The content of the invention
It is to be the provision of one kind to relate to contaminated soil consolidation reparation the invention aims to solve above-mentioned technical problem
Agent, formula is easy, easy to operate, and high treating effect, production cost are low, universality is strong, process cycle is short, appointed condition requirement
Contaminated soil that is low, not causing secondary soil pollution consolidates renovation agent.
Another object of the present invention is to be the provision of one kind to relate to contaminated soil consolidation renovation agent and preparation method thereof, side
Method is easy, and high treating effect, production cost are low, universality is strong, process cycle is short, appointed condition requires low, do not cause secondary soil
Earth pollutes
Technical scheme is used by the present invention solves above-mentioned technical problem：
One kind relates to contaminated soil consolidation renovation agent, and it is made up of the raw material of following percentage by weight：
By such scheme, the SiO in described purified silicious earth2Weight/mass percentage composition be not less than 20%.
By such scheme, described hot splashing steel slag pulverized powder is that particle diameter is small after liquid hot application granulating steel slag handles magnetic separation
In 5mm natural grading slag, wherein calcium and magnesium sial ferriferous oxide total content is more than 95%.
The component (unit wt%) of described hot splashing steel slag pulverized powder：Calcium oxide (CaO) 45.76, silica (SiO2)
14.30th, aluminum oxide (Al2O3) 1.63, ferrous oxide (FeO) 13.11, iron oxide (Fe2O3) 9.28, magnesia (MgO) 9.84,
Manganese dioxide (MnO) 1.71, phosphorus pentoxide (P2O5) 1.40, sulphur (S) 0.056, remaining is impurity.
By such scheme, described iron ore tailings pulverized powder be iron ore after magnetizing roast is handled through select iron handle and
Remaining iron ore tailings, particle diameter are less than 5mm, and wherein calcium and magnesium sial ferriferous oxide total content is more than 95%, and iron content is not
More than 10%.
One kind relates to contaminated soil consolidation renovation agent, and it is made up (preferred scope) of the raw material of following percentage by weight：
One kind relates to contaminated soil consolidation renovation agent, and it is made up (preferable scope) of the raw material of following percentage by weight：
One kind relates to contaminated soil consolidation renovation agent, and it is made up (best scope) of the raw material of following percentage by weight：
One kind relates to contaminated soil consolidation renovation agent, and it is made up of the raw material of following percentage by weight：
A kind of preparation method for relating to contaminated soil consolidation renovation agent, its step are：
A, it is respectively 15% (volumetric concentration) salt acid soak with concentration by slag, purified silicious earth and iron ore tailings
3-5 hours, be in order to which the inert fraction in slag, diatomite and iron ore tailings is eroded into processing because slag with
Iron ore tailings is all solid waste caused by pyroprocess, wherein the indefinite phase group of many calcium and magnesium sial metals oxidation composition
Knit surface compact, be unfavorable for activity excitation, after salt acid attack, be advantageous to its activity excitation, at the same acid immersed with beneficial to increasing
Add the lattice sinking degree and ratio of defects of silica crystals in diatomite, by the slag after processing, diatomite and iron ore
Tailings is mixed, and obtains mixture A；
B, it is using ball mill (common, in the market is purchased) that slag, diatomite and iron ore tailings is levigate to 200 respectively
Below mesh, it is to fully excite its potential pozzolanic activity, is advantageous to it and is reacted in chance water generation volcanic ash；
C, by slag micropowder, calcium oxide, triethanolamine, sodium formate and sodium chloride, (or any) is mixed (then successively
Finished industrial product need to be bought), control purity is primarily to ensure to control production cost while treatment effect, acquisition mixture B；
D, after mixture A and mixture B being added into closing three axle mixers stirring 15-20min, carried out after overlay film packing
Mixing, obtains a kind of soil consolidation renovation agent.
By such scheme, described levigating steel slag powder, slag micropowder and iron ore tailings pulverized powder it is levigate to 200 mesh with
Under, slag micropowder is commercially available No. 95 slag micropowders.
By such scheme, the calcium oxide, triethanolamine, sodium formate and sodium chloride are commercially available technical grade chemical drugs
Product, purity requirement more than 95%.
The mechanism of each component and effect：
Purified silicious earth：It is mainly used in providing soil pollution factor absorption fixing base.The soil pollution factor is in parcel, network
It is attached to after conjunction, adsorption bridging, fixing process inside binding matrix, reaches the purpose of the soil pollution factor and liquid phase separation.It is pure
SiClx diatomaceous earth is less than 10%, and absorption phase matrix does not reach requirement, and purified silicious earth content is higher than 20%, under solid-liquid separation capability
Drop.
Hot splashing steel slag pulverized powder：Soil pollution factor complexing agent, it is mainly used in improving the soil pollution factor in the liquid phase
It is complexed effect.Hot splashing steel slag is levigate, and powder content is less than 10%, it is difficult to forms complex ion, influences consolidating for the overall soil pollution factor
Determine effect, hot splashing steel slag is levigate, and powder content is higher than 50%, and soil pollution factor complex easily forms supersaturated complexing in liquid phase
Thing, the meltage of the soil pollution factor in the liquid phase can be increased, reduce treatment effect.
Iron ore tailings pulverized powder：The soil pollution factor be complexed complex compound mineralizer, be mainly used in improve soil pollution because
The mineralising of sub- complex compound, for lifting the adsorption effect of complex compound.Iron ore tailings is levigate, and powder content is less than 12%, mineralising effect
Fruit is poor, is unfavorable for adsorbing, and iron ore tailings is levigate, and powder content is higher than 32%, is unfavorable for the formation of pollution factor complex compound, reduces
Treatment effect.
Slag micropowder：Contaminated soil induration reinforcing agent, it is mainly used in improving soil consolidation body intensity, is complexed for being lifted
The consolidation of thing, covered effect.Slag micropowder content is less than 10%, and concretion body strength is low, and consolidation effect is poor, is unfavorable for soil and repaiies
Multiple, slag micropowder content is higher than 25%, and intensity enhancing is too fast, can produce scum, pollutes the dissolution of the factor.
Calcium oxide：Mainly play regulatory role, improve system basicity, deposit into the generation of hydration reaction, it is anti-aquation can be accelerated
The progress answered.Calcium oxide incorporation is less than 5%, system basicity lifting unobvious, is unfavorable for the generation of reaction, incorporation is higher than
10%, system basicity is excessive, influences the overall repairing effect of soil.
Triethanolamine, sodium formate and sodium chloride：Three kinds of composite reagents of consolidation reaction accelerator are applied in combination and can promoted
The progress of system hydration reaction at initial stage, deposit into soil pollution factor weak bound water and be converted into chemical bonding water, accelerate the hair of reaction
It is raw, while the generation of strength substrate in induration is also beneficial to, the growth to induration middle and later periods intensity also has good promotion
Effect.Triethanolamine 0.5-1%, sodium formate 0.5-1.5%, sodium chloride 1-2%, the yield of three kinds of components is preferably according to actual conditions
Compound allotment is carried out, to ensure best effect.
The present invention compared with prior art, has advantages below and effect：
The component of contaminated soil consolidation renovation agent is had made intensive studies, five components is chosen, solves contaminated soil
Consolidation repairs the universality problem of medicament, there is provided a kind of high treating effect, production cost are low, universality is strong, process cycle is short, set
Standby condition requires that non-selective contaminated soil that is low, not causing secondary soil pollution consolidates renovation agent.
Embodiment
With reference to embodiment, the present invention will be further described in detail, but this explanation will not be formed to the present invention's
Limitation.
Embodiment 1：
One kind relates to contaminated soil consolidation renovation agent, and it is made up of the raw material of following percentage by weight：
A kind of preparation method for relating to contaminated soil consolidation renovation agent, its step are：
A, it is respectively 15% (volumetric concentration) salt acid soak 3 with concentration by slag, purified silicious earth and iron ore tailings
Or 4 or 5 hours, it is in order to which the inert fraction in slag, diatomite and iron ore tailings is eroded into processing, because slag
All it is solid waste caused by pyroprocess with iron ore tailings, wherein the indefinite phase of many calcium and magnesium sial metals oxidation composition
Tissue surface is fine and close, is unfavorable for activity excitation, after salt acid attack, is advantageous to its activity excitation, at the same acid immersed with beneficial to
Increase the lattice sinking degree and ratio of defects of silica crystals in diatomite, obtain mixture A；
B, it is using ball mill that slag, diatomite and iron ore tailings is levigate to below 200 mesh respectively, it is in order to abundant
Its potential pozzolanic activity is excited, is advantageous to it and is reacted in chance water generation volcanic ash；
C, slag micropowder, calcium oxide, triethanolamine, sodium formate and sodium chloride are mixed (then need purchase industry into
Product), control purity is primarily to ensure to control production cost while treatment effect, acquisition mixture B；
D, mixture A and mixture B is added into three axle mixers of closing and stirs 15 or 16 or 17 or 18 or 19 or 20min
Afterwards, mixed after overlay film packing, obtain a kind of soil consolidation renovation agent.
Component and proportioning in the contaminated soil consolidation renovation agent 2-6 is referring to table 1：(five components add up to 100% weight
Percentage meter).
Table 1 implements formula table %
Its preparation process is same as Example 1.
Wuhan Iron and Steel Plant north lake sewage plant sludge is taken, mud is mixed according to 10% mass fraction, mix rear mold consolidation, is taken off after 1 day
Mould, maintenance determines coefficient of softing after 7 days be 0.91；Antiacid alkali salt media chemistry erosion factor is 1.05；Infiltration coefficient is 2*10- 8cm/s.(see embodiment 2)
Quay of WISCO's Industrial Port sewage plant sludge is taken, mud, mix rear mold consolidation, after 1 day are mixed according to 12% mass fraction
The demoulding, maintenance determines coefficient of softing after 7 days be 0.98；Antiacid alkali salt media chemistry erosion factor is 1.05；Infiltration coefficient reaches
6*10- 8cm/s.(see embodiment 3)
Contaminated soil in the five-pointed star metallic article plant area of Huang gang is taken, mixes mud according to 8% mass fraction, mix rear mold is consolidated
Knot, is stripped after 1 day, and maintenance determines coefficient of softing after 7 days be 0.99；Antiacid alkali salt media chemistry erosion factor is 1.02；Infiltration
Coefficient reaches 4*10- 8cm/s.(see embodiment 4)
Take Jing Zhou sand swell to reach insecticide factory's on-site contaminated soil, mix mud according to 8% mass fraction, mix rear mold is consolidated
Knot, is stripped after 1 day, and maintenance determines coefficient of softing after 7 days be 0.99；Antiacid alkali salt media chemistry erosion factor is 1.02；Infiltration
Coefficient reaches 4*10- 8cm/s.(see embodiment 5)
Wuhan Iron and Steel Plant north lake slag field Landfill Leachate Pollution soil is taken, mixes mud according to 8% mass fraction, mix rear mold is consolidated
Knot, is stripped after 1 day, and maintenance determines coefficient of softing after 7 days be 0.96；Antiacid alkali salt media chemistry erosion factor is 1.04；Infiltration
Coefficient reaches 5*10- 8cm/s.(see embodiment 6).
Claims (7)
1. a kind of contaminated soil consolidates renovation agent, it is made up of the raw material of following percentage by weight：
Raw material %
Purified silicious earth 5-20%
Hot splashing steel slag pulverized powder 10-50%
Iron ore tailings pulverized powder 12-32%
Slag micropowder 10-25%
Calcium oxide 5-10%
Triethanolamine 0.5-1%
Sodium formate 0.5-1.5%
Sodium chloride 1-2%；
Described hot splashing steel slag pulverized powder is that particle diameter is less than 5mm natural grading steel after liquid hot application granulating steel slag handles magnetic separation
Slag, wherein calcium and magnesium sial ferriferous oxide total content is more than 95%；
The component of described hot splashing steel slag pulverized powder is：Calcium oxide 45.76, silica 1 4.30, aluminum oxide 1.63, oxidation
Ferrous iron 13.11, iron oxide 9.28, magnesia 9.84, manganese dioxide 1.71, phosphorus pentoxide 1.40, sulphur 0.056, remaining is miscellaneous
Matter；The unit of described component is mass percent wt%；
Described iron ore tailings pulverized powder be iron ore after magnetizing roast is handled through select iron handle and remaining iron ore tail
Slag, particle diameter are less than 5mm, and for wherein calcium and magnesium sial ferriferous oxide total content more than 95%, iron content is no more than 10%.
A kind of 2. contaminated soil consolidation renovation agent according to claim 1, it is characterised in that：
Raw material %
Purified silicious earth 8-18%
Hot splashing steel slag pulverized powder 20-40%
Iron ore tailings pulverized powder 15-32%
Slag micropowder 12-22%
Calcium oxide 6-9%
Triethanolamine 0.6-0.9%
Sodium formate 0.6-1.4%
Sodium chloride 1.1-1.8%.
A kind of 3. contaminated soil consolidation renovation agent according to claim 1, it is characterised in that：
Raw material %
Purified silicious earth 10-16%
Hot splashing steel slag pulverized powder 25-35%
Iron ore tailings pulverized powder 17-26%
Slag micropowder 14-20%
Calcium oxide 6.5-8.5%
Triethanolamine 0.65-0.85%
Sodium formate 0.7-1.3%
Sodium chloride 1.2-1.7%.
A kind of 4. contaminated soil consolidation renovation agent according to claim 1, it is characterised in that：
Raw material %
Purified silicious earth 12-14%
Hot splashing steel slag pulverized powder 28-32%
Iron ore tailings pulverized powder 18-24%
Slag micropowder 16-18%
Calcium oxide 7-8%
Triethanolamine 0.7-0.8%
Sodium formate 0.8-1.2%
Sodium chloride 1.3-1.6%.
A kind of 5. contaminated soil consolidation renovation agent according to claim 1, it is characterised in that：
Raw material %
Purified silicious earth 16%
Hot splashing steel slag pulverized powder 32%
Iron ore tailings pulverized powder 24%
Slag micropowder 18%
Calcium oxide 7%
Triethanolamine 0.7%
Sodium formate 1.2%
Sodium chloride 1.1%.
A kind of 6. contaminated soil consolidation renovation agent according to claim 1, it is characterised in that：
Raw material %
Purified silicious earth 17%
Hot splashing steel slag pulverized powder 35%
Iron ore tailings pulverized powder 25%
Slag micropowder 15%
Calcium oxide 5%
Triethanolamine 0.9%
Sodium formate 1.1%
Sodium chloride 1%.
7. a kind of preparation method of contaminated soil consolidation renovation agent described in claim 1, its step are：
A, it was respectively 15% volumetric concentration salt acid soak 3-5 hours with concentration by slag, purified silicious earth and iron ore tailings,
Inert fraction in slag, diatomite and iron ore tailings is eroded into processing, while the immersion of acid is beneficial to increase diatom
The lattice sinking degree and ratio of defects of silica crystals, the slag after processing, diatomite and iron ore tailings are entered in soil
Row mixing, obtains mixture A；
B, it is using ball mill that slag, diatomite and iron ore tailings is levigate to below 200 mesh respectively, in order to excite its potential
Pozzolanic activity, beneficial to meet water occur volcanic ash react；
C, slag micropowder, calcium oxide, triethanolamine, sodium formate and sodium chloride are mixed successively or arbitrarily, mixed
Thing B；
D, after mixture A and mixture B being added into closing three axle mixers stirring 15-20min, mixed after overlay film packing,
Obtain a kind of soil consolidation renovation agent.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105837370A (en) * | 2016-04-08 | 2016-08-10 | 武汉理工大学 | An environmental friendly soil ecology modifying agent and a preparing method thereof |
| CN106311739A (en) * | 2016-10-12 | 2017-01-11 | 上海大学 | Method for stabilizing heavy metal in soil through industrial ore washing mud cake stabilizer |
| CN106623379B (en) * | 2016-11-04 | 2020-04-07 | 甘肃天农一禾农业有限公司 | Resource recycling method of construction waste and heavy metal contaminated soil remediation agent |
| CN108191332A (en) * | 2017-12-29 | 2018-06-22 | 常州思宇知识产权运营有限公司 | A kind of light thermal-insulation partition plate |
| CN112195028B (en) * | 2020-09-30 | 2022-01-11 | 鞍钢集团矿业有限公司 | Alkalized rice soil composite modifier and improvement method |
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| JP2004243192A (en) * | 2003-02-13 | 2004-09-02 | Hitachi Constr Mach Co Ltd | Method and system for treating contaminated soil and contaminated soil treatment machine |
| CN103865543A (en) * | 2014-03-22 | 2014-06-18 | 广东工业大学 | Curing agent for heavy metal contaminated soil and application method thereof |
| CN104164238A (en) * | 2014-06-10 | 2014-11-26 | 青岛华仁技术孵化器有限公司 | Efficient solidification/stabilization repair reagent for soil contaminated by heavy metals |
| CN104438312A (en) * | 2014-11-14 | 2015-03-25 | 华中科技大学 | Restoration method of severely combined pollution site |
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| JP2004243192A (en) * | 2003-02-13 | 2004-09-02 | Hitachi Constr Mach Co Ltd | Method and system for treating contaminated soil and contaminated soil treatment machine |
| CN103865543A (en) * | 2014-03-22 | 2014-06-18 | 广东工业大学 | Curing agent for heavy metal contaminated soil and application method thereof |
| CN104164238A (en) * | 2014-06-10 | 2014-11-26 | 青岛华仁技术孵化器有限公司 | Efficient solidification/stabilization repair reagent for soil contaminated by heavy metals |
| CN104438312A (en) * | 2014-11-14 | 2015-03-25 | 华中科技大学 | Restoration method of severely combined pollution site |
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