CN109896563A - A kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates - Google Patents
A kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates Download PDFInfo
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- CN109896563A CN109896563A CN201910272412.3A CN201910272412A CN109896563A CN 109896563 A CN109896563 A CN 109896563A CN 201910272412 A CN201910272412 A CN 201910272412A CN 109896563 A CN109896563 A CN 109896563A
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- iron
- waste water
- coal mine
- containing acidic
- acidic waste
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Abstract
The present invention provides a kind of high efficiency methods for administering the iron-containing acidic waste water that discarded coal mine generates, it essentially discloses using portland cement or ordinary portland cement as main inorganic agent raw material, it is added in coal mine iron-containing acidic waste water, bentonite, flyash can also be mixed into inorganic agent.Inorganic agent is 0-2.0% in the additive amount of coal mine iron-containing acidic waste water.It is mixed after addition, aeration reaction, stewing process.High treating effect of the present invention, pollutants removal rate is high, significant with regulation effect of the method for the present invention to coal mine iron-containing acidic waste water, can especially efficiently remove iron in waste water, manganese.After the processing of this method, the removal rate of iron can reach 99% or more in waste water, and the removal rate of manganese can reach 95% or more, remaining indices meets country and local water quality discharge standard.Inorganic agent of the present invention is at low cost, simple process is high-efficient, and method is economic and practical and does not generate secondary pollution.
Description
Technical field
The present invention relates to a kind of methods of iron-containing acidic waste water administered and generated in discarded coal mine, especially with silicic acid
The method that salt cement or ordinary portland cement remove iron, manganese in discarded coal mine iron-containing acidic waste water as primary raw material.
Background technique
Coal Industrial is the important energy source pillar of human social development and a big pillar of the economy in China.It is expensive in China
The sulfur content of state province, coal is high, because of sulfide mineral (such as FeS2) oxidation then easily formed coal mine iron-containing acidic waste water (AMD,
Acidmine drainage), such waste water is acid by force, corrosivity is strong, complicated component, and iron, the manganese of very high concentrations are even more in waste water
It is difficult to remove, becomes industry a great problem.Due to various reasons, many coal mines are shut down, or discarded, but it is many
Mine/the mine shut down still has a large amount of waste water to emerge chronic pollution local environment from coal mine mouth that is discarded or closing or tunnel,
Due to coal mine iron-containing acidic waste water outlet, abandoned mine downstream is made to occur being up to several kilometers of molten iron, the water flow in entire river, week
Side rock plant etc. is in rust, and the water quality in basin, ecological environment, landscape are seriously destroyed.It is saved in Guizhou In China, according to
Incomplete statistics has a large amount of waste water to emerge coal mine iron-containing acidic waste water chronic pollution from coal mine mouth that is discarded or closing or tunnel
Local river is no less than up to a hundred, causes local environmental problem outstanding, has caused the close attention of society.It synthesizes the relevant data
And existing actual environment problem, the coal mine iron-containing acidic waste water bring environmental problem that local abandoned mine generates mainly include
Following several respects:
1) mountain area water environment is polluted, the irrigation water for draining downstream is influenced, influences local lava underground water；
2) river (streams) aquatic landscape is influenced；
3) waste of great lot of water resources.
For the improvement for a large amount of coal mine iron-containing acidic waste water that abandoned mine generates, administer at present in using most be
And method, use calcium oxide, calcium carbonate, calcium hydroxide, caustic soda etc. as neutralizer, while using aluminium polychloride, polypropylene
Amide etc. is used as flocculant (flocculation aid), but ineffective, generally existing following problems:
1) processing capacity is limited, and water quality is difficult to up to standard.The water body iron content generally handled is in 500mg/L hereinafter, iron is gone
Except rate only 40-80%；When waste strength increases, and especially the concentration of iron is greater than 1000mg/L, removal effect is decreased obviously.
2) complex procedures, it is at high cost.Neutralizer and flocculant that traditional neutralisation uses, flocculation aid amount are big, reagent cost
Height, simultaneously because technical restriction, the precipitating moisture content of generation is high, subsequent that filters pressing need to be carried out to precipitating, and processing cost of disposal is high.
3) precipitation capacity is big, and pile up like a mountain is difficult to handle.The precipitation capacity that traditional neutralisation generates is big, moisture content is high, volume is big,
And wherein complex chemical composition, it is difficult to degrade, be difficult to be dehydrated, thus bring the secondary pollution of serious solid waste.
For existing environmental problem and technical need, there are many researchs of relevant new technology.Such as a kind of patent " coal mine
The processing system and its treatment process of acid mine water " (number of patent application 201310401437.1) discloses a kind of for coal mine
The processing system of acid mine water, this system include fly ash celluar concrete reaction tank and artificial swamp；Wherein mix powder
Coal ash celluar concrete reaction tank includes the acid-base neutralization area being connected and settling zone.Fly ash porous silicate concrete includes
Flyash, cement and gravel, flyash, cement and gravel press the ratio of mud 0.45, and flyash accounts for 40-60%, and gravel accounts for 81.5-
79.5% match ratio is made.Though combining the principle of physics, chemistry, biology in this patented method, processing capacity ten
It is point limited, only there is effect and not significant to some conventional indexs, the treatment effect of iron, manganese is had no and is referred to；It is dense for pollutant
Higher acid coal mine drainage is spent, still there are problems that at high cost, quantity of solid waste is difficult to dispose greatly.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of coal mine iron-containing acidics administered and gushed out in discarded coal mine
The method of waste water is efficiently administered coal mine acidity and is contained using portland cement or ordinary portland cement as inorganic agent primary raw material
Iron waste water can effectively solve basin pollution problem caused by coal mine iron-containing acidic waste water, restore mining area river basin ecological health and river
Road landscape.
A kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates provided by the invention, specifically,
Using cement as inorganic agent raw material, it is added in coal mine iron-containing acidic waste water.The cement is portland cement.Cement can also
To be ordinary portland cement.
A kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as described above, furtherly
It is bright to be, it further include having bentonite in the inorganic agent.
A kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as described above, furtherly
It is bright to be, cement and bentonitic mass ratio are as follows:
Cement 80%-90%；Bentonite 10%-20%.
A kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as described above, furtherly
It is bright to be, cement and bentonitic mass ratio are as follows:
Cement 80%；Bentonite 20%.
A kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as described above, furtherly
It is bright to be, flyash can be mixed in the inorganic agent.
A kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as described above, furtherly
Bright to be, it is 0-50% that flyash, which mixes the mass ratio in inorganic agent,.
A kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as described above, furtherly
Inorganic agent that is bright to be, being added into coal mine iron-containing acidic waste water, addition of the inorganic agent in coal mine iron-containing acidic waste water
Amount is 0-2.0% to amount in parts by mass.
A kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as described above, furtherly
It is bright to be, after inorganic agent is added in coal mine iron-containing acidic waste water, mixed, aeration reaction, stewing process.
A kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as described above, furtherly
Bright to be, the aeration reaction time is 60min or more；Time of repose is 5 hours or more.
Beneficial effects of the present invention:
(1) high treating effect, pollutants removal rate are high: having the removal rate only 40-80% compared with prior art iron, with this
Inventive method is significant to the regulation effect of coal mine iron-containing acidic waste water, can especially efficiently remove iron in waste water, manganese.By this
After the processing of method, the removal rate of iron can reach 99% or more in waste water, and the removal rate of manganese can reach 95% or more, remaining is every
Index meets country and local water quality discharge standard.
(2) inorganic agent is at low cost: since the present invention uses common portland cement or ordinary portland cement as place
Agent primary raw material is managed, the treatment agent than market routine is 30-50% at low cost；Meanwhile staticly settle the stage without flocculant, help
Solidifying agent.COMPREHENSIVE CALCULATING, compared to traditional technology method, the reagent cost that water per ton is handled in the present invention can at least reduce by 50%.
(3) simple process is high-efficient: the inorganic agent that the present invention uses be it is powdered, can be directly added into water body, without spy
Different facilities and equipment；It after mixed aeration reaction, can directly staticly settle, without using flocculant or flocculation aid when precipitating；And
Sediment after sedimentation is handled without filters pressing.
(4) method is economic and practical: inorganic agent is at low cost in the method for the present invention, while adding in precipitation process without medicament, nothing
Filters pressing processing links save later period a large amount of specific resistance to filtration costs.
(5) do not generate secondary pollution: treated precipitates that remaining mud amount is few, small in size, moisture content is low for the method for the present invention
It is (40% hereinafter, optimal up to 25%) and nontoxic, secondary pollution substance is free of, processing disposition facilitates environmental protection.
Specific embodiment
For the present invention using cement as inorganic agent primary raw material, the cement is portland cement, is also possible to common silicic acid
Salt cement.In order to express easily, so-called cement refers to any one of portland cement or ordinary portland cement below.
It include bentonite 10-20% in inorganic agent.Under cement, bentonite are by used mixed proportion (mass parts)
Any group of table:
Cement and bentonite mixed proportion table (%)
More optimal solution is cement and bentonitic mass ratio are as follows: cement 80%；Bentonite 20%.
Inorganic agent can be mixed with flyash, accounting of the flyash in inorganic agent is 0-50%, specifically see the table below:
Incorporation accounting table (%) of the flyash in inorganic agent
Using the addition of above-mentioned inorganic agent in staying water, it is 0 to 2.0% that inorganic agent additive amount is measured in parts by mass.
Such as: 0.5%, 1.0%, 1.5%, 2.0%.
When using above-mentioned inorganic agent, inorganic agent is added in pending water, is mixed, aeration reaction, stands, that is, has handled
At.
Reaction time is 60min or more；Time of repose is 5 hours or more.
Treated, and water DO reaches 6.0mg/L or more, and pH reaches 7.0 or more, can be used as indication index, in waste water at this time
The removal rate of iron can reach 90% or more.
The temperature of waste water to be processed is not required deliberately, 0 degree Celsius or more of outdoor room temperature, usually in 0-35
Degree Celsius.
Construction method of the invention is, by inorganic agent of the invention directly by manually or mechanically adding in coal mine acid to be processed
In property iron content waste water；Or after being watered inorganic agent, it is sprayed in coal mine iron-containing acidic waste water to be processed.As long as making inorganic agent
It is uniformly mixed with coal mine iron-containing acidic waste water to be processed, without specially establishing special charging facility.
Be directed to processing method of the invention, following example will be to inorganic agent use ratio, processing mode and others at
The demonstration of manage bar part progress effect.Water quality indicator detection is monitored using " water and effluent monitoring analysis method (fourth edition) " Plays
Method.
Embodiment one:
The coal mine iron-containing acidic waste water that abandoned mine is gushed out at Guizhou Province one is taken to be tested, raw water quality is shown in Table 1.With biography
Inorganic agent handles water sample in the common preferable calcium oxide of effect and the present invention in system neutralisation.Make in experiment
Inorganic agent group of the invention is divided into portland cement 80%, bentonite 20%.
Experiment totally 4 barrels of water, every barrel of 15L add 1.0% calcium oxide (mass percent, same below), addition respectively
1.0% inorganic agent of the invention, 1.5% inorganic agent of the invention, 2.0% inorganic agent of the invention, aeration reaction after addition
60min is then allowed to stand 5h, and supernatant liquor is taken to detect, testing result and projects removal rate such as the following table 2, while water sample being handled
Precipitating afterwards carries out the measurement of moisture content, the results are shown in Table 3.
1 raw water quality of table detects table
2 water quality testing data of table and pollutants removal rate analysis
Table 3 precipitates the measurement result analysis of moisture content
It can be seen that from data, the inorganic agent (silicic acid in 1.0%, 1.5%, 2.0% the method for the present invention added in raw water
Salt cement 80%, bentonite 20%) it is significant to total iron of acid mine water, ferrous removal effect, especially in addition 2%
When invention inorganic agent, iron removal rate is 99.71%, and ferrous removal rate is 99.96%；Treated water sample pH is more simultaneously
Excellent, pH value is adjusted by raw water 3.74 to treated 7.71；SS removal rate is significant；The volume and moisture content of precipitating significantly reduce,
Compared to the precipitating moisture content generated after traditional oxidation Calcium treatment be 84%, the method for the present invention treated precipitating moisture content only
30% or so.
Embodiment two:
The coal mine iron-containing acidic waste water that abandoned mine is gushed out at Guizhou Province one is taken to be tested, raw water quality is shown in Table 4, experiment
Inorganic agent is the different proportion of raw material to handle water sample in the present invention used.It is specific as follows:
Proportion one: ordinary portland cement 80%, bentonite 20%；
Proportion two: ordinary portland cement 60%, bentonite 15%, flyash 25%；
Proportion three: ordinary portland cement 40%, bentonite 10%, flyash 50%；
Proportion four: flyash 100%.
Totally 4 barrels of water is tested, every barrel of 15L adds inorganic agent proportion one 1.0% (mass percent, same below) respectively, matches
Than 2 1.0%, proportion 3 1.0%, proportion 4 1.0%, aeration reaction 90min, is then allowed to stand 5h after addition, and supernatant liquor is taken to examine
It surveys, testing result and projects removal rate such as the following table 5.
4 raw water quality of table detects table
5 water quality testing data of table and pollutants removal rate analysis
It can be seen that from data, inorganic agent raw material is ordinary portland cement 80%, bentonite 20% in the method for the present invention
When or inorganic agent in incorporation 50% and when flyash below, it is significant to total iron of acid mine water, ferrous removal effect,
99% or more.But individually then effect is undesirable for addition flyash, total iron removal rate only 23.77%.It is thus regarded that processing
Flyash can be suitably incorporated in agent, or during processing using flyash as material previously treated, it can be achieved that the resource of flyash
Change and utilize, while the operating cost of effectively control water process.
Embodiment three:
The tailing mine water at Guizhou Province one, the pilot experiment at the scene of having carried out, acid mine water water quality is as follows at this
Table 6.Inorganic agent group of the invention used in experiment is divided into ordinary portland cement 90%, bentonite 10%.
Totally 4 barrels of tailing mine water, every barrel of 20L are taken on site, respectively (the quality percentage of inorganic agent 0.5% in the addition present invention
Than same below), inorganic agent 1.0% in the present invention, inorganic agent 1.5% in the present invention, inorganic agent 2.0% in the present invention, addition
Aeration reaction 90min afterwards is then allowed to stand 5h, and supernatant liquor is taken to detect, testing result and projects removal rate such as the following table 7.
6 raw water quality of table detects table
7 water quality testing data of table and pollutants removal rate analysis
Can be seen that from data, the method for the present invention is significant to the regulation effect of acid mine water, especially to iron in waste water,
The removal of manganese.After the processing of this method, the removal rate of waste water iron can reach 99% or more, and the removal rate of manganese can reach 96%
More than, remaining indices meets country and local water quality discharge standard.
Example IV:
The tailing mine water at Guizhou Province one, the pilot experiment at the scene of having carried out, acid mine water contaminants iron at this,
Manganese concentration is high, water quality such as the following table 8.Testing inorganic agent in the present invention that uses is the different proportion of raw material come to water sample
Reason.
Proportion one: portland cement 90%, bentonite 10%；
Proportion two: portland cement 85%, bentonite 15%；
Proportion three: portland cement 40%, bentonite 10%, flyash 50%.
Pilot scale takes totally 3 barrels of tailing mine water, every barrel of 15L on site, adds inorganic agent respectively and matches one 1.5% (quality hundred
It is point ratio, same below), proportion 2 1.5%, proportion 3 1.5%, aeration reaction 120min after addition is then allowed to stand 8h, takes
Layer clear liquid detection, testing result and projects removal rate such as the following table 9.
8 raw water quality of table detects table
9 water quality testing data of table and pollutants removal rate analysis
It can be seen that from data, iron, manganese concentration are significantly raised in raw water in the embodiment, iron 1019.80mg/L, manganese
261.90mg/L.Increase accordingly inorganic agent dosage in experiment, extend the aeration reaction time, to the regulation effect of acid mine water according to
It is old significant, the especially removal to iron, manganese in waste water.After the processing of this method, the removal rate of waste water iron can reach 99%
More than, the removal rate of manganese can reach 99% or more, remaining indices meets country and local water quality discharge standard.
Claims (11)
1. a kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates, which is characterized in that using cement as
Inorganic agent is added in coal mine iron-containing acidic waste water.
2. a kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as described in claim 1, special
Sign is that the cement is portland cement.
3. a kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as described in claim 1, special
Sign is that the cement is ordinary portland cement.
4. a kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as described in claim 1, special
Sign is, further includes bentonite in the inorganic agent.
5. a kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as claimed in claim 4, special
Sign is, cement and bentonitic mass ratio are as follows:
Cement 80%-90%；
Bentonite 10%-20%.
6. a kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as claimed in claim 5, special
Sign is, cement and bentonitic mass ratio are as follows:
Cement 80%；
Bentonite 20%.
7. a kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as described in claim 1, special
Sign is, mixes flyash in the inorganic agent.
8. a kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as claimed in claim 7, special
Sign is that it is 0-50% that flyash mixes mass ratio in inorganic agent.
9. a kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as described in claim 1, special
Sign is that additive amount of the inorganic agent in coal mine iron-containing acidic waste water is measured in parts by mass as 0-2.0%.
10. a kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as claimed in claim 9, special
Sign is, after inorganic agent is added in coal mine iron-containing acidic waste water, is mixed, aeration reaction, stewing process.
11. a kind of high efficiency method for administering the iron-containing acidic waste water that discarded coal mine generates as claimed in claim 10,
It is characterized in that, the aeration reaction time is 60min or more；Time of repose is 5 hours or more.
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Cited By (2)
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| CN114212895A (en) * | 2021-12-13 | 2022-03-22 | 水生藻安生物科技（武汉）有限公司 | Composition and device for treating acidic iron ore waste liquid and preparation method thereof |
| CN117151471A (en) * | 2023-09-20 | 2023-12-01 | 中国矿业大学(北京) | Mine water treatment detection method and system |
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| CN114212895A (en) * | 2021-12-13 | 2022-03-22 | 水生藻安生物科技（武汉）有限公司 | Composition and device for treating acidic iron ore waste liquid and preparation method thereof |
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