CN110420482A - A kind of composite flocculation agent for handling oil-sand mine tailing and the processing method for curing thin tailing - Google Patents
A kind of composite flocculation agent for handling oil-sand mine tailing and the processing method for curing thin tailing Download PDFInfo
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- CN110420482A CN110420482A CN201910748708.8A CN201910748708A CN110420482A CN 110420482 A CN110420482 A CN 110420482A CN 201910748708 A CN201910748708 A CN 201910748708A CN 110420482 A CN110420482 A CN 110420482A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
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Abstract
The processing method of the composite flocculation agent and the thin tailing of curing that the present invention provides a kind of for handling oil-sand mine tailing, which includes: 30~70% polyacrylamide；5~30% polydimethyl diallyl ammonium chloride；2~20% calcareous material, the calcareous material are one of calcium carbonate and calcium oxide or a variety of；1~20% adsorbent, the adsorbent are one of diatomite and active carbon or a variety of.The composite flocculation agent sinking speed is fast；After separation of solid and liquid, supernatant is limpid, and suspension content is low, and turbidity is small；The wadding body formed after flocculation is closely knit, and bed mud solid content is high；Thermal adaptability is strong.The composite flocculation agent dissolubility is preferable, cooperate chemicals dosing plant appropriate can direct proof dry powder feeding, save Flocculant dissolver, reduce investment.The present invention can be used for handling the thin tailing of curing；It can also be used for the second dehydration of bed mud simultaneously, after being added to bed mud, the capillary pumped time to be small, and yield stress is moderate, and dehydration rate is high.
Description
Technical field
The invention belongs to tailings glass technical fields, and in particular to a kind of for handling the composite flocculation agent of oil-sand mine tailing
With the processing method for curing thin tailing.
Background technique
Oil-sand refers to the settling sand rich in bitumen, also referred to as " tar sand ".Substantially, oil-sand be it is a kind of by pitch,
The natural mixture of sand, rich ore clay and water composition.The oil-sand ingredient and its content of various regions are different；As mass fraction, typical
Oil-sand composition be: bitumen content is 3~20%, and inanimate matter accounts for 80~85%, the water that remainder is 3~6%.Oil-sand mine is by opening
Separation is adopted and further extracted, synthetic crude can be obtained.It can extract from oil-sand with high density, high viscosity, high-carbon
Hydrogen is than the oil sands bitumen oil with high metal content.When carrying out large-scale industrial production, thermokalite water extraction process pair is generallyd use
Oil-sand carries out exploitation refining, and every exploitation 1m3Pitch, 1.5m will be generated3Tailing.
The main component of oil-sand mine tailing is water, clay, sand and remaining pitch.Tailing is usually discharged into tailing dam,
It realizes and is separated by solid-liquid separation, so that water be made to recycle again.Coarse sand granule rapid precipitation from mud separates, and tiny particle is outstanding
Stable dispersion is formed in supernatant liquid, after general one or two years, these dispersions will form the mud of solid content about 30%, be claimed
To cure fine sand mine.After this, sedimentation will be slower and slower, and tailing keeps this circulation status that would generally be up to decades very
To several centuries.Curing fine sand mine is the by-product of oily placer mining, is pitch, sand, fine sand, thin clay particle and Industry Waste
The mixture of water.Containing a large amount of organic and inorganic components in waste water, since its volume is big, setting capacity is poor, releases outlet capacity difference etc.
Feature causes serious destruction to environment, is related to the consumption of water, the pollution of atmosphere and soil, imbalance of soil etc.,
Cause very big concern of the people to its economy and environment.
Domestic and foreign scholars have carried out a large amount of research to thin tailings glass is cured, and are taken off to the limit to it with finding
The method of water, to achieve the purpose that shorten the tailings time.Wherein, flocculation is that a kind of fast and effeciently realize is separated by solid-liquid separation
Method；Gather suspended particulates to become larger, or form floc sedimentation, to accelerate the coagulation of particle, reaches solid-liquid point
From purpose, this phenomenon or operation be known as flocculate.Flocculant is mainly to have the group of positive (negative) electrical property, and is had in water
Negative (just) electrical some particles for being difficult to separate or particle are close to each other, reduce its potential, are at unstable state,
And using its aggregation property these particles are concentrated, and separate by physics or chemical method.
Flocculant is added when processing cures thin tailing, primarily serves following effect: 1) obtaining the charge of colloidal solid
It neutralizes, keeps stable particle de- steady, to flock together, increase particle, to settle down；2) can individual particle it
Between play bridging action, so that the little particle of script is formed biggish micelle, settle down；3) while reducing suspended matter, moreover it is possible to
Remove heavy metal and the organic matter etc. in water removal.Method common at present is using polyacrylamide as flocculant, to curing fine sand tail
Mine is handled.But when using existing flocculant process, the rate of settling is slow, and supernatant suspended matter is more after flocculation, turbidity
Greatly, bed mud moisture content is high, and treatment effect is to be improved.
Summary of the invention
In view of this, the application provides the place of a kind of composite flocculation agent for handling oil-sand mine tailing and the thin tailing of curing
Reason method, using composite flocculation agent provided by the invention, sinking speed is fast, and supernatant is limpid after separation of solid and liquid, and turbidity is small, bed mud
Solid content is high, has preferable treatment effect.
The present invention provides a kind of for handling the composite flocculation agent of oil-sand mine tailing, the group including following mass percentage
Point:
30~70% polyacrylamide；
5~30% polydimethyl diallyl ammonium chloride；
2~20% calcareous material, the calcareous material are one of calcium carbonate and calcium oxide or a variety of；
1~20% adsorbent, the adsorbent are one of diatomite and active carbon or a variety of.
Preferably, the viscosity average molecular weigh of the polyacrylamide is 800 ten thousand to 1,200 ten thousand.
Preferably, the composite flocculation agent includes 5~15% calcareous material, and the calcareous material is calcium carbonate or oxidation
Calcium.
Preferably, the composite flocculation agent includes the following components'mass percentage:
30~70% polyacrylamide；
5~30% polydimethyl diallyl ammonium chloride；
2~20% calcareous material；
0.5~19% diatomite；
0.5~1% active carbon.
Preferably, the diatomite is the modification infusorial earth using organics modifications, and surface has charge.
Preferably, the appearance of the composite flocculation agent is solid particle, and 20 DEG C of density are 0.7~0.8g/cm3, 0.5% water
The pH value of solution is 7~8.
The present invention provides a kind of processing method for curing thin tailing, comprising the following steps:
Add flocculant to curing in thin tailing, after be separated by solid-liquid separation, obtain supernatant and bed mud；
The flocculant is previously described composite flocculation agent.
Preferably, the flocculant is added directly in dry powder form, and dosage is 100~400g/ton dry measure ratio.
Preferably, the flocculant is added with the solution form that concentration is 200~500ppm.
Preferably, the processing method further include: add the flocculant into obtained bed mud, obtain second dehydration
Substance.
It compared with prior art, mainly include gathering the present invention is provided to handle the composite flocculation agent of oil-sand mine tailing
Two kinds of organic polymer agglutinating matters of acrylamide and polydimethyl diallyl ammonium chloride, and with inorganic calcareous material and
Adsorbent, which is used as, helps condensate matter to be compounded.In the present invention, the molecular weight of the polydimethyl diallyl ammonium chloride is opposite
Polyacrylamide is smaller, has good cohesion for the thin particulate matter in tailing；The usual molecular weight of polyacrylamide is big,
Bridging action can be played, the micelle of formation is further condensed into bigger wadding body, the two, which combines, is adapted to wider grain
The tailing system of diameter distribution.Composite flocculation agent of the present invention is swift in response, and sinking speed is fast；After separation of solid and liquid, supernatant is clear
Clear, suspension content is low, and turbidity is small；The wadding body formed after flocculation is closely knit, and bed mud solid content is high；Thermal adaptability is strong, especially
Low temperature.
In addition, the composite flocculation agent dissolubility is preferable, cooperate chemicals dosing plant appropriate can direct proof dry powder feeding, save flocculation
Agent dissolver reduces investment.Composite flocculation agent of the present invention can be used for handling thin tailing of curing etc.；It can also be used for bottom simultaneously
The second dehydration of mud, after being added to bed mud, the capillary pumped time is small, and yield stress is moderate, and dehydration rate is high.
Detailed description of the invention
Fig. 1 is the grain size distribution that thin tailing is cured in some embodiments of the invention；
Fig. 2 is the subsidence curve that composite flocculation agent is applied in the embodiment of the present invention 2；
Fig. 3 is the subsidence curve that polyacrylamide is applied in the embodiment of the present invention 2.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
The present invention provides a kind of for handling the composite flocculation agent of oil-sand mine tailing, including following mass percentage
Component:
30~70% polyacrylamide；
5~30% polydimethyl diallyl ammonium chloride；
2~20% calcareous material, the calcareous material are one of calcium carbonate and calcium oxide or a variety of；
1~20% adsorbent, the adsorbent are one of diatomite and active carbon or a variety of.
Composite flocculation agent provided by the invention can make the curing thin tailing of oil-sand fast mainly for the treatment of the curing thin tailing of oil-sand
Speed, which is realized, to be separated by solid-liquid separation, and the suspended matter in supernatant, COD and the pitch being effectively removed reduce turbidity, is improved bed mud and is contained admittedly
Amount.
Based on mass percentage, composite flocculation agent provided by the invention includes 30~70% polyacrylamide (PAM),
Its content is preferably 40~65%.Also, the composite flocculation agent includes 5~30% polydimethyl diallyl ammonium chloride
(PDADMAC).In an embodiment of the present invention, the viscosity average molecular weigh of the polyacrylamide is 800 ten thousand to 1,200 ten thousand (general sheets
Field viscosity average molecular weigh is referred to as relative molecular weight, room temperature).The ion degree of the polyacrylamide is according to different tailing samples
Screening determines, generally commonly uses anion and/or nonionic type for oil-sand mine.The polydimethyl diallyl ammonium chloride
Relative molecular weight is 30-60 ten thousand, dissolution time 5-10min.
In the present invention, the molecular weight vs polypropylene amide of the polydimethyl diallyl ammonium chloride is smaller, for
Thin particulate matter in tailing has good cohesion；The usual molecular weight of polyacrylamide is big, can play bridging action, by shape
At micelle be further condensed into bigger wadding body, the two combines the tailing system for being adapted to more wide size distribution.
In addition, the dissolubility of the polydimethyl diallyl ammonium chloride is very good, it is used in compounding with polyacrylamide,
The disadvantage that polyacrylamide dissolution time can be overcome long；And cooperate chemicals dosing plant appropriate can direct proof dry powder feeding, save
Flocculant dissolver reduces investment.
The present invention is composite flocculation made of being compounded as above two organic polymer agglutinating matter with no machine aided condensate matter
Agent；And it includes 2~20% calcareous material and 1~20% adsorbent.Wherein, the calcareous material is calcium carbonate and oxygen
Change one of calcium or a variety of, preferably calcium carbonate.The adsorbent be one of diatomite and active carbon or a variety of, mainly
Play suction-operated.
In an embodiment of the present invention, the composite flocculation agent preferably includes 5~15% calcareous material；The calcic object
Matter can be calcium carbonate, can also be replaced with calcium oxide.Present invention preferably employs calcium carbonate, act on: first is that adsorption, second is that
Help solidifying, auxiliary PAM and PDADMAC generation flocculating effect.The embodiment of the present invention uses calcium carbonate or calcium oxide under normal circumstances,
Although magnesium salts has some other specific uses, it is not suitable for the system of the invention.
Preferably, the composite flocculation agent main component and each component percentage composition: polyacrylamide 30~70%；It is poly-
Dimethyl diallyl ammonium chloride 5~30%；Calcium carbonate 2~20%；Diatomite 0.5~19%；Active carbon 0.5~1%.
Wherein, the diatomite is preferably the modification infusorial earth for using organics modifications, and content is preferably 5~19%；
Enhance before the absorption property ratio of diatomite after organically-modified, and keep its surface electrically charged, for the suspended matter in tailing
There is preferably removal effect.Specifically, the granularity of the modification infusorial earth is 70~90 microns, e.g. 75 μm or so；
SiO2Content 65-75%, bulk density is 0.40g/cm3Left and right.The active carbon is preferably cocoanut active charcoal, and granularity can be
0.5-2mm。
Commercially available each component raw material can be used in the embodiment of the present invention, passes through the routine operations system such as mixing, dry using mixing machine
The standby composite flocculation agent；Its appearance is gray solid particle, effective content >=88%.Herein, effective content is solid matter
It measures content (abbreviation solid content, wherein the dry powder raw material of polyacrylamide and polydimethyl diallyl ammonium chloride is aqueous).Institute
The density (20 DEG C) for stating composite flocculation agent is generally 0.7~0.8g/cm3；The pH value of 0.5wt% aqueous solution is 7~8.
The present invention provides the composite flocculation agent mainly for processing oil-sand cures thin tailing, and curing oil-sand can be made thin
Tailing fast implements separation of solid and liquid, the suspended matter in supernatant, COD and the pitch being effectively removed, and reduces turbidity, improves bed mud
Solid content, and it is easy to use, and cost is relatively low.
Correspondingly, the embodiment of the invention provides a kind of processing methods for curing thin tailing, comprising the following steps: to curing
Add flocculant in thin tailing, after be separated by solid-liquid separation, obtain supernatant and bed mud；The flocculant is previously described compound
Flocculant.
The main component of oil-sand mine tailing is water, clay, sand and remaining pitch.When tailings discharging is into tailing dam, slightly
The sand grains precipitation and separation from mud rapidly, and tiny particle forms stable dispersion in suspension, through after a period of time
Afterwards, these dispersions form the gel mud of solid content about 30wt%, referred to as curing oil-sand fine sand mine, referred to as cure thin
Tailing.In an embodiment of the present invention, the property of the thin tailing of curing can be found in table 1 and Fig. 1, and Fig. 1 is the embodiment of the present invention
Cure the grain size distribution of thin tailing.
The property of thin tailing is cured in 1. some embodiments of the invention of table
The embodiment of the present invention cures thin tailing using the processing of previously described composite flocculation agent, is added thereto a certain amount of
The flocculant is separated by solid-liquid separation after the flocculation of certain time, respectively obtains supernatant and bed mud.Of the invention one
In a little embodiments, the composite flocculation agent is added directly in dry powder form, is dissolved flocculant without dissolver, can be reduced throwing
Enter；The dosage can be 100~400g/ton dry measure ratio, such as 250g/ton dry measure ratio, 300g/ton dry measure ratio.Herein,
Dosage is the ratio of the dry measure (gram) of flocculant Yu the dry measure (ton) of tailing sample.In other embodiments of the invention,
The composite flocculation agent is added with the solution form that concentration is 200~500ppm.
In addition, the residence time of flocculant described in the embodiment of the present invention can be at 2 hours or more, treatment temperature is generally normal
Temperature；The separation of solid and liquid uses separate mode commonly used in the art.
The prior art cannot carry out second dehydration with bed mud of the same medicament to sedimentation, and increasing a kind of medicament will increase
Corresponding dissolution equipment, to increase input cost.And processing method described in the embodiment of the present invention it is also preferable to include: to what is obtained
The flocculant is added in bed mud, obtains the substance of second dehydration.
The present invention composite flocculation agent can also be used for the second dehydration of bed mud simultaneously, after being added to bed mud, when capillary pumped
Between it is small, yield stress is moderate, and dehydration rate is high, further reduced input cost.
For a further understanding of the application, below with reference to embodiment to provided by the present application for handling oil-sand mine tailing
Composite flocculation agent and the processing method for curing thin tailing are specifically described.It is understood that these embodiments be with
Implemented under premised on technical solution of the present invention, the detailed implementation method and specific operation process are given, only for into
One step illustrates the features and advantages of the present invention, rather than limiting to the claimed invention, and protection scope of the present invention is not yet
It is limited to following embodiments.
Meanwhile in the case where no in addition explanation, various source chemicals and equipment involved in present specification
It is purchased from market and directly uses.
In following embodiment, the tailing sample is the commercially available thin tailing of curing, and property is referring to table 1 and Fig. 1；Described
The granularity of modification infusorial earth is 75 μm or so；SiO2Content 65-75%, bulk density is 0.40g/cm3Left and right.The active carbon
For cocoanut active charcoal, granularity 0.5-2mm.
Embodiment 1
By 50% polyacrylamide (viscosity average molecular weigh 10,000,000, ion degree 30%), 30% two allyl of poly dimethyl
Ammonium chloride (relative molecular weight 500,000), 10% calcium carbonate, 9.5% modification infusorial earth and 0.5% active carbon mixing, system
It is standby to obtain composite flocculation agent.
The appearance of the flocculation medicament is gray solid particle, and effective content >=88%, (20 DEG C) of density are 0.7~0.8g/
cm3, the pH value of 0.5% aqueous solution is 7~8.
Embodiment 2
1000g is weighed after tailing sample is sufficiently shaken up, is placed in the beaker of a 1L.The sample blender is existed
It is stirred under the speed of 350rpm 3 minutes, speed is then down to 160rpm, the flocculant water of 0.05% embodiment 1 preparation is added
Solution.
Once the flocculant solution, which is added, begins to timing, the time that flocculant is added is 1min, continues to stir after adding
1min.Turn off blender, flocculated tailing sample is transferred in the 1L graduated cylinder of paper with a scale.Start timing, record sedimentation rapidly
Subsidence curve of the height to the time.
Meanwhile it doing and the composite flocculation agent of different dosages and the sedimentation experiment of independent polyacrylamide is added.Each sedimentation
Referring to figs. 2 and 3, Fig. 2 is the subsidence curve of the composite flocculation agent of the invention to curve, and dosage is respectively 100g/ton,
200g/ton, 300g/ton, 400g/ton.Fig. 3 is the subsidence curve of polyacrylamide, and dosage is respectively 200g/ton,
300g/ton, 400g/ton.Comparison diagram 1 and Fig. 2, as can be seen that independent addition polymerization acrylamide, 100g/ton on subsidence curve
When hardly settle, therefore do not obtain its subsidence curve, and use the composite flocculation agent of 100g/ton, the sedimentation of sample solid
Obviously；When being all 200g/ton, 300g/ton and 400g/ton dosage, the tailing sample of composite flocculation agent processing settles speed
Degree is obviously than individually adding PAM much faster.Using the 300g/ton composite flocculation agent, can almost be settled in 2s completely.
It the results are shown in Table 2 after processing, as known from Table 2, compare polyacrylamide, using composite flocculation agent provided by the invention,
Sinking speed is fast, and supernatant is limpid after separation of solid and liquid, and turbidity is small, and bed mud solid content is high, has preferable treatment effect.
The result of sample after table 2 flocculates
Embodiment 3
By 65% polyacrylamide (viscosity average molecular weigh 10,000,000, ion degree 30%), 5% poly dimethyl allyl
Ammonium chloride (relative molecular weight 500,000), 10% calcium carbonate, 19% modification infusorial earth and 1% active carbon mixing, be prepared into
To composite flocculation agent.
The appearance of the flocculation medicament is gray solid particle, and effective content >=88%, (20 DEG C) of density are 0.7~0.8g/
cm3, the pH value of 0.5% aqueous solution is 7~8.
Embodiment 4
Flocculant prepared with embodiment 3 is adopted, second dehydration is carried out to the bed mud generated after 2 one sections of embodiment flocculations.Tool
Body are as follows:
After one section of flocculating setting 2h, supernatant is poured out, the sample that following bed mud is dehydrated as two sections is put into burning
In cup.The bed mud sample speed of 200rpm is stirred into 1min, 0.2% flocculant solution is then added, starts to count
When.The addition time of flocculant is 1min, continues to stir 1min after adding.Blender is closed, flocculated sample is shifted rapidly
Into the graduated cylinder of a 1L.
Meanwhile comparing the composite flocculation agent of different dosages and the dehydrating effect of independent polyacrylamide.
Dehydrating effect dehydration rate, yield stress, capillary pumped time are measured:
Dehydration rate: (moisture content of bed mud before being dehydrated-moisture content of bed mud after the dehydration of addition flocculant)/bed mud before being dehydrated
Moisture content × 100%；
Yield stress: being measured with Brookfield RV DV-3T viscosimeter, with paddle rotor 0.5rpm revolving speed
Lower test obtains the yield stress of sample, and temperature is 25 DEG C；
Capillary pumped time (CST): the TRITON ELECTRONICS LIMITED Type 304M capillary pumped time is used
Instrument tests sample, obtains the capillary pumped time, for reflecting the water separation capability of sample.
Concrete outcome is shown in Table 3, and as seen from Table 3, the flocculant that 100g/ton dry measure ratio is added can reach de- well
Water effect, and polyacrylamide needs the dosage of 250g/ton could be effective, effect is still worse than the application.
Result after 3 bed mud of table adds flocculant to be dehydrated
As seen from the above embodiment, composite flocculation agent of the present invention is swift in response, and sinking speed is fast；After separation of solid and liquid,
Supernatant is limpid, and suspension content is low, and turbidity is small；The wadding body formed after flocculation is closely knit, and bed mud solid content is high；Thermal adaptability
By force, especially low temperature.In addition, the composite flocculation agent dissolubility is preferable, cooperate chemicals dosing plant appropriate can direct proof dry powder feeding, save
Flocculant dissolver is removed, investment is reduced.Composite flocculation agent of the present invention can be used for handling thin tailing of curing etc.；It can also be simultaneously
For the second dehydration of bed mud, after being added to bed mud, the capillary pumped time is small, and yield stress is moderate, and dehydration rate is high.
The above is only a preferred embodiment of the present invention, it is noted that for making the professional technique of the art
Personnel are that by various modifications to these embodiments without departing from the technical principles of the invention, and these
Modification also should be regarded as the range that the present invention should protect.
Claims (10)
1. a kind of for handling the composite flocculation agent of oil-sand mine tailing, which is characterized in that the group including following mass percentage
Point:
30~70% polyacrylamide；
5~30% polydimethyl diallyl ammonium chloride；
2~20% calcareous material, the calcareous material are one of calcium carbonate and calcium oxide or a variety of；
1~20% adsorbent, the adsorbent are one of diatomite and active carbon or a variety of.
2. composite flocculation agent according to claim 1, which is characterized in that the viscosity average molecular weigh of the polyacrylamide is
800 ten thousand to 1,200 ten thousand.
3. composite flocculation agent according to claim 1, which is characterized in that the composite flocculation agent includes 5~15% containing
Calcium substance, the calcareous material are calcium carbonate or calcium oxide.
4. composite flocculation agent according to claim 1, which is characterized in that the composite flocculation agent includes following quality percentage
The component of ratio:
30~70% polyacrylamide；
5~30% polydimethyl diallyl ammonium chloride；
2~20% calcareous material；
0.5~19% diatomite；
0.5~1% active carbon.
5. composite flocculation agent according to claim 4, which is characterized in that the diatomite is changing using organics modifications
Property diatomite, surface have charge.
6. composite flocculation agent according to any one of claims 1 to 5, which is characterized in that outside the composite flocculation agent
Seeing is solid particle, and 20 DEG C of density are 0.7~0.8g/cm3, the pH value of 0.5% aqueous solution is 7~8.
7. a kind of processing method for curing thin tailing, comprising the following steps:
Add flocculant to curing in thin tailing, after be separated by solid-liquid separation, obtain supernatant and bed mud；
The flocculant is composite flocculation agent according to any one of claims 1 to 6.
8. processing method according to claim 7, which is characterized in that the flocculant is added directly in dry powder form, is thrown
Dosage is 100~400g/ton dry measure ratio.
9. processing method according to claim 7, which is characterized in that the flocculant is 200~500ppm's with concentration
Solution form adds.
10. the processing method according to any one of claim 7~9, which is characterized in that the processing method further include:
The flocculant is added into obtained bed mud, obtains the substance of second dehydration.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112174282A (en) * | 2020-09-10 | 2021-01-05 | 武汉理工大学 | Double electric layer pre-oxidation composite flocculant and preparation method and application thereof |
| CN114632618A (en) * | 2022-02-25 | 2022-06-17 | 海南绿峰资源开发有限公司 | Treatment method for curing fine tailings |
| CN115770556A (en) * | 2022-10-17 | 2023-03-10 | 孙海滨 | Composite carrier adsorption type flocculant and preparation method thereof |
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| CN114632618B (en) * | 2022-02-25 | 2024-01-09 | 海南绿峰资源开发有限公司 | Treatment method for curing fine tailings |
| CN115770556A (en) * | 2022-10-17 | 2023-03-10 | 孙海滨 | Composite carrier adsorption type flocculant and preparation method thereof |
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