CN107570109A - A kind of method that carbide slag treated coal ash realizes its recycling - Google Patents
A kind of method that carbide slag treated coal ash realizes its recycling Download PDFInfo
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- CN107570109A CN107570109A CN201710981437.1A CN201710981437A CN107570109A CN 107570109 A CN107570109 A CN 107570109A CN 201710981437 A CN201710981437 A CN 201710981437A CN 107570109 A CN107570109 A CN 107570109A
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- flyash
- carbide slag
- coal ash
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Abstract
The invention belongs to environmental technology field, specifically discloses a kind of method that carbide slag treated coal ash realizes its recycling, and this method comprises the following steps：First, flyash and carbide slag are fully ground, sieved, after being well mixed；2nd, add NaOH into step 1, then ground and mixed is uniform, loads porcelain boat, be put into tubular type Muffle furnace, 600 ~ 800 DEG C, under the conditions of the sccm of nitrogen atmosphere 100, calcine 1 ~ 5 h, heating rate is 5 DEG C/min；3rd, the sample for calcining to obtain in step 2 is subjected to Temperature fall and is cooled to room temperature, take out sample, with hydrochloric acid and water washing to neutrality, dried to constant weight, you can a kind of modified coal ash sorbing material is prepared.This method can solve flyash and acetylene sludge as recycling and reclaim the problems such as difficult, realize the effect of efficient, green, the present invention is had extremely wide application prospect.
Description
Technical field
The invention belongs to environmental technology field, specifically discloses a kind of carbide slag treated coal ash and realizes its recycling
Method.
Background technology
A large amount of flyash of coal-burning power plant's discharge cause serious environmental problem.On the one hand, the flyash of bulk deposition
Influence the attractive in appearance of city；On the other hand, during heavy metal ion can permeate the ground water in the flyash placed for a long time, cause water dirty
Dye, different degrees of harm is caused to human body and animals and plants；In addition, substantial amounts of flyash can also form airborne dust, cause serious
Atmosphere pollution, give rise to diseases.At the same time, calcium carbide hydrolysis can produce substantial amounts of during producing acetylene, polyvinyl chloride
Industrial waste carbide slag.The main component of carbide slag is Ca (OH)2, its alkalescence is very strong, and serious pollution is caused to environment.
The present invention is based on the thinking of " treatment of wastes with processes of wastes against one another ", and carbide slag and flyash is composite modified.In a nitrogen atmosphere, calcium carbide
Slag and flyash are compound, add NaOH, and its corrasion can improve the specific surface area of flyash, can also act as activator, from
And strengthen the adsorption capacity of carbon residue in flyash.Sorbing material caused by after carbide slag and flyash are compound can be used for removing water body
In congo red, so as to solve the problems, such as dye discoloration environment, and can realizes the comprehensive utilization to flyash and carbide slag,
With important theory and realistic meaning.
The content of the invention
The purpose of the present invention：In order to solve the environmental problem caused by a large amount of flyash, based on the thinking of " treatment of wastes with processes of wastes against one another ",
A kind of method that carbide slag and flyash is composite modified is designed, and opens up its potential application valency in terms of water pollution processing
Value.
Technical scheme is as follows：A kind of method that carbide slag treated coal ash realizes its recycling, the party
Method comprises the following steps：
（1）Flyash and carbide slag are fully ground, sieved, after being well mixed；
（2）Add NaOH into step 1, then ground and mixed is uniform, loads porcelain boat, be put into tubular type Muffle furnace, 600 ~ 800 DEG C, nitrogen
Under the conditions of the sccm of gas atmosphere 100,1 ~ 5 h is calcined, heating rate is 5 DEG C/min；
（3）The sample for calcining to obtain in step 2 is subjected to Temperature fall and is cooled to room temperature, sample is taken out, with hydrochloric acid and water washing
To neutrality, dry to constant weight, you can a kind of modified coal ash sorbing material is prepared.
Further, the mass ratio of the flyash and carbide slag is 1: 1 ~ 5, and flyash and NaOH mass ratio are 1: 1 ~ 5.
Further, the condition in step 2 is preferably that temperature is 750 DEG C, under the conditions of the sccm of nitrogen atmosphere 100, calcines 1h,
Heating rate is 5 DEG C/min.
Above-mentioned flyash and carbide slag and the various materials used are commercially available obtains.
Compared with prior art, the present patent application has advantages below：NaOH fluxing action promotes powder in course of reaction
Together with coal ash melts with carbide slag, new pattern is formed.Relatively unmodified flyash, its performance for adsorbing congo red have
Very big lifting.This method can solve flyash and acetylene sludge as recycling and reclaim the problems such as difficult, realize efficient, green work(
Effect, make the present invention that there is extremely wide application prospect.
Brief description of the drawings
Fig. 1 is that the SEM of unmodified flyash schemes；Fig. 2 is the SEM figures of composite modified flyash under nitrogen atmosphere；Fig. 3 is multiple
Close the XRD spectrum of modified coal ash；Fig. 4 be composite modified flyash to Congo red absorption property figure, wherein（a）It is ultraviolet can
See diffusing reflection spectrum；（b）Congo red concentration changes with time.
Embodiment
A kind of method that embodiment 1, carbide slag treated coal ash realize its recycling, this method include following step
Suddenly：
（1）Flyash and carbide slag are fully ground for 1: 1 in mass ratio, sieved, after being well mixed；
（2）Add NaOH into step 1, it according to flyash and NaOH mass ratio is 1: 1 that wherein NaOH quality, which is, after addition
Ground and mixed is uniform again, loads porcelain boat, is put into tubular type Muffle furnace, 600 DEG C, under the conditions of the sccm of nitrogen atmosphere 100, calcines 1 h,
Heating rate is 5 DEG C/min；
（3）The sample for calcining to obtain in step 2 is subjected to Temperature fall and is cooled to room temperature, sample is taken out, with hydrochloric acid and water washing
To neutrality, dry to constant weight, you can a kind of modified coal ash sorbing material is prepared.
A kind of method that embodiment 2, carbide slag treated coal ash realize its recycling, this method include following step
Suddenly：
（1）Flyash and carbide slag are fully ground for 1: 5 in mass ratio, sieved, after being well mixed；
（2）Add NaOH into step 1, it according to flyash and NaOH mass ratio is 1: 5 that wherein NaOH quality, which is, after addition
Ground and mixed is uniform again, loads porcelain boat, is put into tubular type Muffle furnace, 800 DEG C, under the conditions of the sccm of nitrogen atmosphere 100, calcines 5 h,
Heating rate is 5 DEG C/min；
（3）The sample for calcining to obtain in step 2 is subjected to Temperature fall and is cooled to room temperature, sample is taken out, with hydrochloric acid and water washing
To neutrality, dry to constant weight, you can a kind of modified coal ash sorbing material is prepared.
Embodiment 3,1.0016g flyash and 2.0020g carbide slags are weighed respectively, be fully ground, sieve, the two mixing,
1h is ground, makes to be well mixed as far as possible；The NaOH for weighing 2.0008g is added in said mixture, then grinds 0.5h, mixes three
Close uniform.In nitrogen under the conditions of 750 DEG C（100sccm）, " sccm " is gas mass flow unit, states standard per minute
Milliliter）The h of calcining sample 1, heating rate are 5 DEG C/min；Treat that sample Temperature fall is cooled to room temperature, take out sample, be with concentration
The 1mol/L HCL cleaning complete NaOH of unreacted, wash to neutrality, sample dries 12h, the SEM of product at 80 DEG C in an oven
Characterize, as shown in Figure 2（Fig. 1 is unmodified flyash）, it is seen that its pattern illustrates that NaOH's is fluxing there occurs huge change
Effect forms new pattern together with promoting flyash to melt with carbide slag.Flyash XRD spectrum after composite modified, such as Fig. 3 institutes
Show, it is seen that there occurs huge change for its structure.Composite modified flyash to Congo red absorption property, as shown in figure 4, with reference to
Fig. 4（a）With（b）Scheme visible, relatively unmodified flyash, its modified absorption property improves a lot.
Claims (3)
1. a kind of method that carbide slag treated coal ash realizes its recycling, this method comprise the following steps：
（1）Flyash and carbide slag are fully ground, sieved, after being well mixed；
（2）Add NaOH into step 1, then ground and mixed is uniform, loads porcelain boat, be put into tubular type Muffle furnace, 600 ~ 800 DEG C, nitrogen
Under the conditions of the sccm of gas atmosphere 100,1 ~ 5 h is calcined, heating rate is 5 DEG C/min；
（3）The sample for calcining to obtain in step 2 is subjected to Temperature fall and is cooled to room temperature, sample is taken out, with hydrochloric acid and water washing
To neutrality, dry to constant weight, you can a kind of modified coal ash sorbing material is prepared.
2. according to the method for claim 1, it is characterised in that：The mass ratio of the flyash and carbide slag is 1: 1 ~ 5, powder
Coal ash and NaOH mass ratio are 1: 1 ~ 5.
A 3. method according to claim 1, it is characterised in that：Condition in step 2 is preferably that temperature is 750 DEG C, nitrogen
Under the conditions of the sccm of gas atmosphere 100,1h is calcined, heating rate is 5 DEG C/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710981437.1A CN107570109A (en) | 2017-10-20 | 2017-10-20 | A kind of method that carbide slag treated coal ash realizes its recycling |
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| CN201710981437.1A CN107570109A (en) | 2017-10-20 | 2017-10-20 | A kind of method that carbide slag treated coal ash realizes its recycling |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110368894A (en) * | 2019-07-03 | 2019-10-25 | 合山市春旭环保科技有限责任公司 | A kind of high performance agent for removing fluorin and preparation method thereof removing fluorinion in waste water |
| CN113416027A (en) * | 2021-07-14 | 2021-09-21 | 新疆大学 | Preparation method of spherical porous sewage treatment adsorbent taking industrial solid wastes as active raw materials |
| CN113562993A (en) * | 2021-07-22 | 2021-10-29 | 天津工业大学 | Method for preparing aluminate water treatment agent from fly ash by using sodium bicarbonate and carbide slag |
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| CN101182167A (en) * | 2007-11-15 | 2008-05-21 | 武汉理工大学 | Wet-discharging fly ash composite carbide slag blending slurry and method for preparing the same |
| CN104495899A (en) * | 2014-11-30 | 2015-04-08 | 湖南科技大学 | Method for synergic resource utilization of acetylene sludge and coal ash |
| CN104826578A (en) * | 2015-05-29 | 2015-08-12 | 浙江海洋学院 | Fly ash modified adsorbent and preparing method thereof and method of treating oily sewage |
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| CN101182167A (en) * | 2007-11-15 | 2008-05-21 | 武汉理工大学 | Wet-discharging fly ash composite carbide slag blending slurry and method for preparing the same |
| CN104495899A (en) * | 2014-11-30 | 2015-04-08 | 湖南科技大学 | Method for synergic resource utilization of acetylene sludge and coal ash |
| CN104826578A (en) * | 2015-05-29 | 2015-08-12 | 浙江海洋学院 | Fly ash modified adsorbent and preparing method thereof and method of treating oily sewage |
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| YAN LI等: "Experimental research on mercury-containing wastewater by fly ash", 《APPLIED MECHANICS AND MATERIALS》 * |
| 郭振华等: "碱对粉煤灰的活化及吸附性能的研究", 《功能材料》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110368894A (en) * | 2019-07-03 | 2019-10-25 | 合山市春旭环保科技有限责任公司 | A kind of high performance agent for removing fluorin and preparation method thereof removing fluorinion in waste water |
| CN110368894B (en) * | 2019-07-03 | 2022-09-13 | 合山市春旭环保科技有限责任公司 | Efficient fluorine removal agent for removing fluorine ions in wastewater and preparation method thereof |
| CN113416027A (en) * | 2021-07-14 | 2021-09-21 | 新疆大学 | Preparation method of spherical porous sewage treatment adsorbent taking industrial solid wastes as active raw materials |
| CN113562993A (en) * | 2021-07-22 | 2021-10-29 | 天津工业大学 | Method for preparing aluminate water treatment agent from fly ash by using sodium bicarbonate and carbide slag |
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Application publication date: 20180112 |