CN103787624A - Environment-friendly type steel slag based sludge curing agent - Google Patents
Environment-friendly type steel slag based sludge curing agent Download PDFInfo
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- CN103787624A CN103787624A CN201410052022.2A CN201410052022A CN103787624A CN 103787624 A CN103787624 A CN 103787624A CN 201410052022 A CN201410052022 A CN 201410052022A CN 103787624 A CN103787624 A CN 103787624A
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- curing agent
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- slag
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- sludge curing
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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 an environment-friendly type steel slag based sludge curing agent. The environment-friendly type steel slag based sludge curing agent is mainly composed of steel slag, cement, lime, sodium silicate and gypsum. The environment-friendly type steel slag based sludge curing agent is composed of the components in percentage by weight: 45.0%-60.0% of the steel slag, 14.0-25.0% of the cement, 6.0-18.0% of the lime, 0.5-5.0%of the sodium silicate and 7.0-11.0% of the gypsum. The environment-friendly type steel slag based sludge curing agent is simple in material composition, scientific and reasonable and easy to implement; a lot of the raw materials are the steel slag which is difficultly consumed and utilized in current industry; the raw materials are abundant in source, low in cost, and environmental friendly and pollution-free; compared with a traditional sludge curing material, the performance cost ratio is high, the energy is saved and the consumption is reduced, and the cost is saved.
Description
Technical field
The present invention relates to a kind of environment-friendly type fixed agent, particularly a kind of environment-friendly type slag base sludge curing agent.
Background technology
Slag is the byproduct producing in steelmaking process, in recent years, China's slag accumulation volume of cargo in storage reaches more than 300,000,000 ton, also to increase every year in addition tens million of tons newly, because traditional utilization ratio of slag is lower, national development recycling economy and the execution that realizes industrial slag zero release strategy are affected, for this reason, making full use of slag, is the effective way that realizes recycling economy, economizes on resources, reduces costs, realizes National Macroscopic resource allocation and sustainable economic development.
In sludge solidification engineering, adopt the solidify material such as lime, cement, have more disadvantage because the performance of material itself causes curing silt soil, can not meet well the needs of sludge solidification and engineering construction.Strength of lime soil forms slowly, if the incorporation of lime goes beyond the scope, the intensity of solidified earth can decline on the contrary, lime-fly ash stabilization soil (two-ash soil) is widely used in the processing of Muddy Bottoms inferior grade roadbase and subbase, but early epistasis and water resistance are poor, directly affect construction speed.Cement-earth is subject to the restriction of mud soil property classification more outstanding, and suitability is bad.In a word, the early strength of limestone soil, two-ash soil and cement-earth is on the low side, drying shrinkage more greatly, easy cracking, and its performance is subject to the impact of soil property larger, and some Subgrade soils be there is no to what solidification effect.In addition traditional sludge solidification material is that master mixes thing mainly with flyash or slag greatly, and versatility is bad, and water stability is poor.Patent of invention " soil-solidified-agent " CN1712639A utilizes flyash to mix thing as solidifying agent master, although the activity of flyash is effectively excited, but cost is high, water tolerance is not strong, in addition along with the domestic research and development about flyash high value added product and production, progressively its large-scale application that also limited in short supply of flyash, therefore, the deficiency that the solidify material such as traditional lime, flyash and cement exist has limited its application in engineering.
Summary of the invention
For addressing the above problem, the invention discloses a kind of environment-friendly type slag base sludge curing agent, adopt mineral excitation principle, steel slag grinding to Blain specific surface is greater than to 300 m
2/ kg, jointly form sludge solidification material with silicate cement, lime, water glass, gypsum, by rational Match, dissolving, when being difficult to the slag of recycling to provide one to have ultimate compression strength high, solidification effect is good, decides and mixes the sludge curing agent of thing with industrial solid castoff slag.So not only can maximum slag be made full use of, can also prepare high-performance environment protection type slag base sludge curing agent.
Environment-friendly type slag base sludge curing agent disclosed by the invention is mainly made up of slag, cement, lime, water glass and gypsum, and wherein each component composition weight percent is: slag 45.0 ~ 60.0%; Cement 14.0 ~ 25.0%; Lime 6.0 ~ 18.0%; Water glass 0.5 ~ 5.0%; Gypsum 7.0 ~ 11.0%.
The one of environment-friendly type slag base sludge curing agent disclosed by the invention is improved, and described slag is industrial solid castoff shrend slag.
Another of environment-friendly type slag base sludge curing agent disclosed by the invention improved, and described steel slag grinding to Blain specific surface is 300 ~ 900 ㎡/㎏.
Another of environment-friendly type slag base sludge curing agent disclosed by the invention improved, and described gypsum is the one of semi-hydrated gypsum or dihydrate gypsum or the plaster of paris.
Mechanism of the present invention is mineral excitation mechanism, and the each component of solidifying agent complements each other, acting in conjunction.Fe in shrend slag glassy phase
2o
3with active substance CaO, SiO
2as a kind of active ingredient, be can generate C3S, C2S, Fe (OH) under the acting in conjunction of additional lime and hydrolysis product of cement at bases exciting agent
2, and Fe (0H)
3gel, be filled in the effect of playing filling and skeleton in other hydrated product, in cement hydration process, iron replacing section aluminium, form drated calcium aluminate and hydrated calcium ferrite solid solution or aquation sulphur calcium ferrite and hydrated calcium aluminate sulfate solid solution, the activity of slag is through exciting, and the total aquation amount of cement increases.Fe in slag participates in forming AFt, so along with the increase of steel slag content, the dry shrinkage of solidified earth can not reduce, and can keep stable.In the time that steel slag content reaches 50%, the generation that rises to AFt of solidified earth porosity provides space, and structural formation can obtain further closely knit.The strong basicity environment that water glass in curing agent component provides and minor glue effect can be guaranteed the excitation of exciting agent and slag.Can play significant reinforcement to solidified earth as the gypsum that sulfate ion effect is provided, this is because form a large amount of C at cement and alkali excitation
3s, C
2in the environment of S, due to the existence of sulfate ion, can generate gradually a large amount of AFt, increase owing to being accompanied by volume in AFt generative process, so not only the intensity of solidified earth is played to increasing action, also the hole of solidified earth is played to limited filling and densification.In brief, the slag with many excellent chemical character as mainly mixing thing, excite component efficiently, effectively the scientific and reasonable coupling between enhancement component makes the slag can be by the production that is applied to sludge curing agent of large volume, develops economic, practical, environmental protection and sludge curing agent efficiently.
Embodiment
Below in conjunction with embodiment, further illustrate the present invention, should understand following embodiment and only be not used in and limit the scope of the invention for the present invention is described.
Environment-friendly type slag base sludge curing agent disclosed by the invention is mainly made up of slag, cement, lime, water glass and gypsum, and wherein each component composition weight percent is: slag 45.0 ~ 60.0%; Cement 14.0 ~ 25.0%; Lime 6.0 ~ 18.0%; Water glass 0.5 ~ 5.0%; Gypsum 7.0 ~ 11.0%.
Preferred as one, described slag is industrial solid castoff shrend slag.
Preferred as one, described steel slag grinding to Blain specific surface is 300 ~ 900 ㎡/㎏.
Preferred as one, described gypsum is the one of semi-hydrated gypsum or dihydrate gypsum or the plaster of paris.
Embodiment
Slag is shrend slag, and chemical composition is as shown in table 1;
Cement is normal silicate 425# cement (component is in table 1), the modulus of water glass is 2.6, in the time preparing solidifying agent, water glass can evenly mix as solid components with other component, also can be mixed with solution and add in proportion separately as liquid phase component in use.Test soil property is taken from underground 1.5 meters of depths, Xu Xu new district, Lianyun Harbour, is mudflat sludge, and the basic parameter of mud is as shown in table 2.
Table 3 adopts the each component of the made solidifying agent of different proportionings and weight part for solidifying agent raw material, first slag is done to drying treatment, its water content is controlled at below 5%, in solidifying agent, the white lime content of free calcium oxide should be between 60-80%, accurately weigh the each component of solidifying agent by the each weight part shown in table 3, then intergrinding or separate grinding are respectively 300 ㎡/㎏ to Blain specific surface embodiment 1-10, 400 ㎡/㎏, 500 ㎡/㎏, 600 ㎡/㎏, 700 ㎡/㎏, 800 ㎡/㎏, 900 ㎡/㎏, 300 ㎡/㎏, 500 ㎡/㎏, after 900 ㎡/㎏, evenly mix again, can obtain sludge curing agent of the present invention.
Table 4 is solidifying agent of preparing with the listed curing agent component of table 3, wherein the solidifying agent of reference examples 1,2 is respectively and adopts 425# ordinary Portland cement and lime, in the time that in each embodiment and reference examples, solidifying agent, 425# ordinary Portland cement and lime intermingled quantity are 80kg, the solidified earth sample strength test result of preparing according to the unconfined compression strength experimental technique (T0805-94) in " highway engineering stabilized with inorganic binder testing of materials rules ".Mud and solidifying agent be uniform mixing in rectangular dish by a certain percentage, weigh the consumption of each test specimen compound by predetermined compacted density, pack in the die trial of φ 50 × 50mm, adopt Static compaction moulding, unloading, the demoulding obtains after test specimen, be put in sealing wet box and thermostatic chamber and carry out heat and moisture preserving health 7d, temperature is controlled at 25 scholar 2'C, the last day of preserving period, test specimen is immersed in water, and the degree of depth of water should make the water surface about 2.5cm on test specimen top.Between preserving period, the loss of test specimen quality meets the following requirements: small specimen is no more than 1g.When different proportioning, the test result of solidifying agent solidified earth (embodiment 1-10), cement-earth (reference examples 1), limestone soil (reference examples 2) is as shown in table 4:
Can be found out by above embodiment (1-10), reference examples (1-2) test-results; when slag base sludge curing agent 80kg volume of the present invention, 7 days unconfined compression strengths of solidified earth are far better than cement-earth, the limestone soil in the same length of time; it is worthy of note that the present invention is not limited to volume and the soil property in above embodiment, the adjustment of curing agent component being made because soil property, volume are different with environment for use or replace also among protection scope of the present invention.
The disclosed technique means of the present invention program is not limited only to the disclosed technique means of above-mentioned technique means, also comprises the technical scheme being made up of above technical characterictic arbitrary combination.The above is the specific embodiment of the present invention; 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 make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (4)
1. an environment-friendly type slag base sludge curing agent, is characterized in that: described environment-friendly type slag base sludge curing agent is mainly made up of slag, cement, lime, water glass and gypsum, and wherein each component composition weight percent is: slag 45.0 ~ 60.0%; Cement 14.0 ~ 25.0%; Lime 6.0 ~ 18.0%; Water glass 0.5 ~ 5.0%; Gypsum 7.0 ~ 11.0%.
2. environment-friendly type slag base sludge curing agent according to claim 1, is characterized in that: described slag is industrial solid castoff shrend slag.
3. environment-friendly type slag base sludge curing agent according to claim 1 and 2, is characterized in that: described steel slag grinding to Blain specific surface is 300 ~ 900 ㎡/㎏.
4. environment-friendly type slag base sludge curing agent according to claim 1, is characterized in that: described gypsum is the one of semi-hydrated gypsum or dihydrate gypsum or the plaster of paris.
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| CN201410052022.2A CN103787624A (en) | 2014-02-15 | 2014-02-15 | Environment-friendly type steel slag based sludge curing agent |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104402380A (en) * | 2014-11-05 | 2015-03-11 | 长江南京航道工程局 | Curing material based on viscous waste soil, and preparation method thereof |
| CN104479685A (en) * | 2014-12-05 | 2015-04-01 | 上海宝冶钢渣综合开发实业有限公司 | Compound heavy metal solidifying agent for governing contaminated soil and preparation method thereof |
| CN105254166A (en) * | 2015-11-14 | 2016-01-20 | 辽宁工程技术大学 | Dewatered sludge curing agent and preparing method and using method thereof |
| CN105314940A (en) * | 2014-07-10 | 2016-02-10 | 鞍钢股份有限公司 | Cement solidified waste and toxic chromium slag processing method thereof |
| CN105503116A (en) * | 2016-01-21 | 2016-04-20 | 长沙有色冶金设计研究院有限公司 | Cemented filling material |
| JP2016193969A (en) * | 2015-03-31 | 2016-11-17 | 日新製鋼株式会社 | Solidifying material and production method of solidifying material |
| CN106915877A (en) * | 2017-03-06 | 2017-07-04 | 邹立夫 | One kind pollution greasy filth inorganic agent and its application method |
| CN107254314A (en) * | 2017-06-23 | 2017-10-17 | 北京农业职业学院 | A kind of soil-solidified-agent and its preparation method and application |
| CN110255836A (en) * | 2019-06-05 | 2019-09-20 | 路德环境科技股份有限公司 | Composition and sludge curing method for rapid curing municipal sludge |
| CN111253045A (en) * | 2020-02-01 | 2020-06-09 | 肇庆泉兴生态科技有限公司 | Steel slag-based town sludge dehydrating agent and dehydrating method thereof |
| CN112921945A (en) * | 2021-01-27 | 2021-06-08 | 中钢集团马鞍山矿山研究总院股份有限公司 | Method for reinforcing soft soil foundation by taking industrial solid wastes as main raw materials |
| CN113957759A (en) * | 2021-11-29 | 2022-01-21 | 大连海事大学 | Continuous treatment equipment and method for using high-water-content dredged sludge as roadbed |
| CN114133151A (en) * | 2021-12-02 | 2022-03-04 | 福小泥(福建)科技有限公司 | Steel slag-doped low-carbon cementing material capable of solidifying soft soil and use method thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105314940B (en) * | 2014-07-10 | 2017-05-24 | 鞍钢股份有限公司 | Cement solidified waste and toxic chromium slag processing method thereof |
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| CN104402380A (en) * | 2014-11-05 | 2015-03-11 | 长江南京航道工程局 | Curing material based on viscous waste soil, and preparation method thereof |
| CN104479685A (en) * | 2014-12-05 | 2015-04-01 | 上海宝冶钢渣综合开发实业有限公司 | Compound heavy metal solidifying agent for governing contaminated soil and preparation method thereof |
| JP2016193969A (en) * | 2015-03-31 | 2016-11-17 | 日新製鋼株式会社 | Solidifying material and production method of solidifying material |
| CN105254166B (en) * | 2015-11-14 | 2017-10-20 | 辽宁工程技术大学 | A kind of dewatered sludge curing agent, preparation method and application method |
| CN105254166A (en) * | 2015-11-14 | 2016-01-20 | 辽宁工程技术大学 | Dewatered sludge curing agent and preparing method and using method thereof |
| CN105503116A (en) * | 2016-01-21 | 2016-04-20 | 长沙有色冶金设计研究院有限公司 | Cemented filling material |
| CN106915877A (en) * | 2017-03-06 | 2017-07-04 | 邹立夫 | One kind pollution greasy filth inorganic agent and its application method |
| CN107254314A (en) * | 2017-06-23 | 2017-10-17 | 北京农业职业学院 | A kind of soil-solidified-agent and its preparation method and application |
| CN110255836A (en) * | 2019-06-05 | 2019-09-20 | 路德环境科技股份有限公司 | Composition and sludge curing method for rapid curing municipal sludge |
| CN111253045A (en) * | 2020-02-01 | 2020-06-09 | 肇庆泉兴生态科技有限公司 | Steel slag-based town sludge dehydrating agent and dehydrating method thereof |
| CN112921945A (en) * | 2021-01-27 | 2021-06-08 | 中钢集团马鞍山矿山研究总院股份有限公司 | Method for reinforcing soft soil foundation by taking industrial solid wastes as main raw materials |
| CN113957759A (en) * | 2021-11-29 | 2022-01-21 | 大连海事大学 | Continuous treatment equipment and method for using high-water-content dredged sludge as roadbed |
| CN114133151A (en) * | 2021-12-02 | 2022-03-04 | 福小泥(福建)科技有限公司 | Steel slag-doped low-carbon cementing material capable of solidifying soft soil and use method thereof |
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Application publication date: 20140514 |