CN111039375A - Flocculating agent for mine beneficiation wastewater treatment and preparation method and application thereof - Google Patents
Flocculating agent for mine beneficiation wastewater treatment and preparation method and application thereof Download PDFInfo
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- CN111039375A CN111039375A CN201911337714.0A CN201911337714A CN111039375A CN 111039375 A CN111039375 A CN 111039375A CN 201911337714 A CN201911337714 A CN 201911337714A CN 111039375 A CN111039375 A CN 111039375A
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- flocculant
- beneficiation wastewater
- mine beneficiation
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- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 238000004065 wastewater treatment Methods 0.000 title claims description 13
- 239000008394 flocculating agent Substances 0.000 title abstract description 11
- 239000002351 wastewater Substances 0.000 claims abstract description 37
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229920001661 Chitosan Polymers 0.000 claims abstract description 25
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 22
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000292 calcium oxide Substances 0.000 claims abstract description 18
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 18
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 17
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 17
- 239000011790 ferrous sulphate Substances 0.000 claims abstract description 17
- 235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 17
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 17
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims abstract description 17
- 239000003513 alkali Substances 0.000 claims abstract description 16
- 229920005610 lignin Polymers 0.000 claims abstract description 16
- 239000000440 bentonite Substances 0.000 claims abstract description 11
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 11
- 229920000881 Modified starch Polymers 0.000 claims abstract description 9
- 239000004368 Modified starch Substances 0.000 claims abstract description 9
- 235000019426 modified starch Nutrition 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims description 46
- 238000000227 grinding Methods 0.000 claims description 26
- 238000002156 mixing Methods 0.000 claims description 25
- 229920002472 Starch Polymers 0.000 claims description 14
- 239000008107 starch Substances 0.000 claims description 14
- 235000019698 starch Nutrition 0.000 claims description 14
- 239000000725 suspension Substances 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 11
- RUUHDEGJEGHQKL-UHFFFAOYSA-M 2-hydroxypropyl(trimethyl)azanium;chloride Chemical compound [Cl-].CC(O)C[N+](C)(C)C RUUHDEGJEGHQKL-UHFFFAOYSA-M 0.000 claims description 10
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 10
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- WBGKAOURNYRYBT-UHFFFAOYSA-N 2-sulfopropanoic acid Chemical compound OC(=O)C(C)S(O)(=O)=O WBGKAOURNYRYBT-UHFFFAOYSA-N 0.000 claims description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 claims description 2
- RZFBEFUNINJXRQ-UHFFFAOYSA-M sodium ethyl xanthate Chemical compound [Na+].CCOC([S-])=S RZFBEFUNINJXRQ-UHFFFAOYSA-M 0.000 claims description 2
- 238000005189 flocculation Methods 0.000 abstract description 7
- 230000016615 flocculation Effects 0.000 abstract description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 7
- 235000010755 mineral Nutrition 0.000 abstract description 7
- 239000011707 mineral Substances 0.000 abstract description 7
- 238000001179 sorption measurement Methods 0.000 abstract description 6
- 239000000084 colloidal system Substances 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 3
- 239000000843 powder Substances 0.000 description 56
- 230000000052 comparative effect Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005188 flotation Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 229920002401 polyacrylamide Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 125000004442 acylamino group Chemical group 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013500 performance material Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a flocculating agent for treating mine beneficiation wastewater, and a preparation method and application thereof. The flocculant for treating mine beneficiation wastewater comprises 8-12 wt% of bentonite, 33-37 wt% of aluminum sulfate, 20-22 wt% of ferrous sulfate, 8-12 wt% of calcium oxide, 6-10 wt% of alkali lignin, 5-9 wt% of calcium carbonate, 4-6 wt% of modified chitosan and 3-5 wt% of modified starch, wherein the total weight of the flocculant for treating mine beneficiation wastewater is 100 wt%. The invention also provides a preparation method and application of the flocculant for treating the mine beneficiation wastewater. The flocculant provided by the invention can be used for treating turbid circulating water of mineral separation, suspended matters, colloids, organic matters and the like in the turbid circulating water are removed through flocculation and adsorption, and the treated turbid water can reach the standard of reuse water.
Description
Technical Field
The invention relates to the technical field of mine beneficiation wastewater treatment and recycling. More particularly relates to a flocculating agent for treating mine beneficiation wastewater, and a preparation method and application thereof.
Background
Iron mine ore dressing is very important for improving the grade of iron ore, and is also very important for improving the quality of final steel production. Flotation is a very common beneficiation process, which is a beneficiation process that floats solid minerals from a water suspension (ore pulp) according to differences in the physical and chemical properties of the mineral surface. Flotation is widely applied in the mineral processing industry and is most suitable for separating low-grade and fine-particle dip-dyed ores. Turbid circulating water generated in the flotation process can enter a turbid circulating water system after being treated to reach the standard, and is reused in the flotation process. This has practiced thrift the ore dressing greatly and has consumed the water consumption, has improved the utilization ratio of water resource.
However, a large amount of tiny suspended matters are distributed in turbid circulating water of mineral separation, and a common flocculation method is difficult to remove, so that the using amount of chemical agents and the generation amount of sludge are greatly increased, and the degree of scaling of a water pipeline is also increased.
Therefore, the invention provides a flocculating agent for treating mine beneficiation wastewater, and a preparation method and application thereof, so as to solve the problems.
Disclosure of Invention
The first purpose of the invention is to provide a flocculating agent for treating mine beneficiation wastewater.
The second purpose of the invention is to provide a preparation method of the flocculant for treating mine beneficiation wastewater.
The third purpose of the invention is to provide the application of the flocculant for treating the mine beneficiation wastewater.
In order to achieve the purpose, the invention adopts the following technical scheme:
a flocculant for mine beneficiation wastewater treatment, which comprises the following components by weight percent based on 100 percent of the total weight of the flocculant for mine beneficiation wastewater treatment:
in the flocculant for treating mine beneficiation wastewater, the modified starch is a natural organic polymeric flocculant which has good flocculation and sedimentation performance, and raw materials are completely taken from nature and can be completely biodegraded;
the modified chitosan is also a natural organic polymeric flocculant, chitosan molecules have a large amount of acylamino and hydroxyl, the modified chitosan has good adsorption and flocculation capabilities, and raw materials are completely taken from the nature and can be completely biodegraded;
the alkali lignin can effectively remove hardness ions in water, thereby playing a certain scale inhibition function;
the bentonite has the main component of montmorillonite, has better adsorption capacity on organic matters, can also provide a carrier for flocculation precipitation and improves the coagulation and sedimentation performance of flocs;
the aluminum sulfate and the ferrous sulfate can change suspended matters into small flocs through the electric neutralization, and then the large flocs can be formed and rapidly settled after being bridged and swept by the natural organic polymeric flocculant more effectively;
the calcium carbonate can improve the compactness of the floc, so that the floc is not easy to break after being formed;
the calcium oxide has two functions, namely, the pH of the sewage is adjusted to improve the using effect of the flocculant, and calcium hydroxide colloid is generated to improve the compactness of floc, is not easy to break and is rapidly settled;
the components are mutually matched and have synergistic effect, suspended matters, colloids, organic matters and the like in mine beneficiation turbid circulating water are removed through flocculation and adsorption, the treated turbid water can reach the standard of reuse water, and the effect of the invention on the aspect of mine beneficiation wastewater treatment is weakened due to the lack of any component or the change of the content of any component.
Preferably, the modified starch includes one or more of carboxylic acid type amphoteric starch, phosphoric acid type amphoteric starch, and sulfopropionic acid type amphoteric starch.
Preferably, the modified chitosan comprises one or more of 2-hydroxypropyl trimethyl ammonium chloride chitosan, carboxymethyl chitosan and sodium xanthate chitosan.
Preferably, the bentonite comprises one or more of organically modified bentonite, pillared bentonite and calcined modified bentonite.
Preferably, the mesh number of the bentonite is not less than 300 meshes.
Preferably, the mesh number of the aluminum sulfate is not less than 200 meshes.
Preferably, the mesh number of the ferrous sulfate is not less than 200 meshes.
Preferably, the mesh number of the calcium oxide is not less than 300 meshes.
Preferably, the mesh number of the alkali lignin is not less than 100 meshes.
Preferably, the mesh number of the calcium carbonate is not less than 200 meshes.
Preferably, the mesh number of the modified chitosan is not less than 100 meshes.
Preferably, the mesh number of the modified starch is not less than 100 meshes.
Preferably, the mesh ratio of the bentonite, the aluminum sulfate, the ferrous sulfate, the calcium oxide, the alkali lignin, the calcium carbonate, the modified chitosan and the modified starch is 300:200:200:300:100: 200: 100:100.
In another aspect of the invention, the invention also provides a preparation method of the flocculant for treating mine beneficiation wastewater, which comprises the following steps:
1) uniformly mixing bentonite, modified chitosan and modified starch in proportion to obtain a mixture A;
2) mixing and stirring the mixture A and water to obtain a suspension; drying the suspension to obtain a mixture B;
3) grinding the mixture B to enable the mesh number of the mixture B to be not less than 300 meshes to obtain a mixture C;
4) and uniformly mixing the mixture C, aluminum sulfate, calcium oxide, alkali lignin, calcium carbonate and ferrous sulfate to obtain the flocculant for treating the mine beneficiation wastewater.
Preferably, the mass ratio of the mixture A to the water in the step 2) is 1: 30-40.
Preferably, the stirring conditions in step 2) are: stirring at a rotation speed of 50-100 rpm for more than 15 min.
Preferably, the conditions of the drying treatment in step 2) are: drying for 30-48 h at 50-70 ℃; the drying treatment is performed to remove water from the suspension.
Preferably, the mixing uniformity of the mixture C, the aluminum sulfate, the calcium oxide, the alkali lignin, the calcium carbonate and the ferrous sulfate is more than 99%.
It should be understood that, in the above steps, the mixing is a conventional technical means in the field, and stirring can be performed during the mixing process, and the purpose of stirring is to more fully mix the components and prevent local agglomeration; the mixing step is carried out at room temperature unless otherwise specified; in addition, in the preparation method of the flocculant for treating mine beneficiation wastewater, provided by the invention, the adding sequence of each component is not specifically required, and a person skilled in the art can reasonably adjust the adding sequence of the raw materials according to the field operation requirement.
As another aspect of the invention, the invention also provides application of the flocculant for treating the mine beneficiation wastewater in treating the mine beneficiation wastewater.
In addition, unless otherwise specified, any range recited herein includes any value between the endpoints and any sub-range defined by any value between the endpoints or any value between the endpoints.
The invention has the following beneficial effects:
the flocculant for treating mine beneficiation wastewater provided by the invention is especially suitable for a turbid circulating water system with fine suspended particles and high requirement on the concentration of effluent particulate matters; the method can be used for treating the turbid circulating water of mineral separation, and can remove suspended matters, colloids, organic matters and the like in the turbid circulating water by flocculation and adsorption, and the treated turbid water can reach the standard of reuse water.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below in connection with preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
In the invention, the preparation method is a conventional method if no special description is provided; the starting materials used are commercially available from published sources unless otherwise specified.
Example 1
The embodiment provides a flocculant for mine beneficiation wastewater treatment, which comprises the following components in percentage by weight based on the total weight of the flocculant as 100 percent by weight:
the embodiment also provides a preparation method of the flocculant for treating mine beneficiation wastewater, which comprises the following steps:
1) grinding the organically modified bentonite into 300-mesh powder, and respectively grinding the 2-hydroxypropyl trimethyl ammonium chloride chitosan and the carboxylic acid type amphoteric starch into 100-mesh powder; uniformly mixing organic modified bentonite powder, 2-hydroxypropyl trimethyl ammonium chloride chitosan powder and carboxylic acid type amphoteric starch powder in proportion to obtain a mixture A;
2) mixing the mixture A and water according to a mass ratio of 1:30, and stirring at the rotating speed of 70rpm for 20min to obtain a suspension; drying the suspension at 70 ℃ for 36h to obtain a mixture B;
3) grinding the mixture B into 300-mesh powder to obtain a mixture C;
4) grinding aluminum sulfate, calcium carbonate and ferrous sulfate into 200-mesh powder, grinding calcium oxide into 300-mesh powder, and grinding alkali lignin into 100-mesh powder; and uniformly mixing the mixture C, aluminum sulfate powder, calcium oxide powder, alkali lignin powder, calcium carbonate powder and ferrous sulfate powder to obtain the flocculant for treating the mine beneficiation wastewater.
Example 2
The embodiment provides a flocculant for mine beneficiation wastewater treatment, which comprises the following components in percentage by weight based on the total weight of the flocculant as 100 percent by weight:
the embodiment also provides a preparation method of the flocculant for treating mine beneficiation wastewater, which comprises the following steps:
1) grinding the organically modified bentonite into 300-mesh powder, and respectively grinding the 2-hydroxypropyl trimethyl ammonium chloride chitosan and the carboxylic acid type amphoteric starch into 100-mesh powder; uniformly mixing organic modified bentonite powder, 2-hydroxypropyl trimethyl ammonium chloride chitosan powder and carboxylic acid type amphoteric starch powder in proportion to obtain a mixture A;
2) mixing the mixture A and water according to a mass ratio of 1: 40, mixing, and stirring at the rotating speed of 60rpm for 20min to obtain a suspension; drying the suspension at 70 ℃ for 48 hours to obtain a mixture B;
3) grinding the mixture B into 300-mesh powder to obtain a mixture C;
4) grinding aluminum sulfate, calcium carbonate and ferrous sulfate into 200-mesh powder, grinding calcium oxide into 300-mesh powder, and grinding alkali lignin into 100-mesh powder; and uniformly mixing the mixture C, aluminum sulfate powder, calcium oxide powder, alkali lignin powder, calcium carbonate powder and ferrous sulfate powder to obtain the flocculant for treating the mine beneficiation wastewater.
Comparative example 1
The present comparative example provides a flocculant for mine beneficiation wastewater treatment, comprising, based on the total weight of the flocculant being 100 wt%:
the comparative example also provides a preparation method of the flocculant for treating mine beneficiation wastewater, which comprises the following steps:
1) grinding sodium chloride into 300-mesh powder, and respectively grinding 2-hydroxypropyl trimethyl ammonium chloride chitosan and carboxylic acid type amphoteric starch into 100-mesh powder; uniformly mixing sodium chloride powder, 2-hydroxypropyl trimethyl ammonium chloride chitosan powder and carboxylic acid type amphoteric starch powder in proportion to obtain a mixture A;
2) mixing the mixture A and water according to a mass ratio of 1:30, and stirring at the rotating speed of 70rpm for 20min to obtain a suspension; drying the suspension at 70 ℃ for 36h to obtain a mixture B;
3) grinding the mixture B into 300-mesh powder to obtain a mixture C;
4) grinding aluminum sulfate, calcium carbonate and ferrous sulfate into 200-mesh powder, grinding calcium oxide into 300-mesh powder, and grinding alkali lignin into 100-mesh powder; and uniformly mixing the mixture C, aluminum sulfate powder, calcium oxide powder, alkali lignin powder, calcium carbonate powder and ferrous sulfate powder to obtain the flocculant for treating the mine beneficiation wastewater.
Comparative example 2
The present comparative example provides a flocculant for mine beneficiation wastewater treatment, comprising, based on the total weight of the flocculant being 100 wt%:
the comparative example also provides a preparation method of the flocculant for treating mine beneficiation wastewater, which comprises the following steps:
1) grinding the organically modified bentonite into 300-mesh powder, and respectively grinding the 2-hydroxypropyl trimethyl ammonium chloride chitosan and the carboxylic acid type amphoteric starch into 100-mesh powder; uniformly mixing organic modified bentonite powder, 2-hydroxypropyl trimethyl ammonium chloride chitosan powder and carboxylic acid type amphoteric starch powder in proportion to obtain a mixture A;
2) mixing the mixture A and water according to a mass ratio of 1: 40, mixing, and stirring at the rotating speed of 60rpm for 20min to obtain a suspension; drying the suspension at 70 ℃ for 48 hours to obtain a mixture B;
3) grinding the mixture B into 300-mesh powder to obtain a mixture C;
4) grinding aluminum sulfate, calcium carbonate and ferrous sulfate into 200-mesh powder respectively, grinding sodium chloride into 300-mesh powder, and grinding alkali lignin into 100-mesh powder; and uniformly mixing the mixture C, aluminum sulfate powder, calcium oxide powder, alkali lignin powder, calcium carbonate powder and ferrous sulfate powder to obtain the flocculant for treating the mine beneficiation wastewater.
Test example 1
The test example provides application of a flocculating agent for treating mine beneficiation wastewater in mine beneficiation turbid circulating water treatment engineering, and the method comprises the following steps:
the flocculant prepared in example 1 and the composition prepared in comparative example 1, and the commercially available polyaluminium chloride and polyacrylamide compositions are applied to a mine beneficiation circulating water treatment reaction device or reaction unit respectively.
The experimental results show that: when the concentration of suspended matters in raw water of certain beneficiation turbid circulating water is 10000mg/L, and the adding amount of commercially available polyaluminium chloride and polyacrylamide is 15mg/L and 0.5mg/L respectively, the average value of suspended matters in effluent is 59 mg/L; when the addition amount of the flocculant in the embodiment 1 of the invention is 2mg/L, the average value of the suspended matters in the effluent is reduced to 29 mg/L; when the flocculant of the comparative example 1 of the invention is used for adding 2mg/L, the average value of the suspended matters in the effluent is reduced to 35 mg/L. Compared with the compositions of commercial polyaluminium chloride and polyacrylamide, the flocculant of the example 1 and the flocculant of the comparative example 1 have the advantages that the concentration of suspended substances in effluent is reduced by 50.8 percent and 40.1 percent respectively, and the dosage of a pesticide per ton of water is reduced by 87.1 percent. Therefore, the high-efficiency flocculant of the embodiment 1 is applied to a mine beneficiation wastewater system, and the water outlet effect is obviously improved. The lack of the organically modified bentonite results in the reduction of the adsorption and net capturing capacity of the flocculant to the micro particles, which also causes the deviation of the effluent effect of the comparative example 1 compared with the example 1.
Test example 2
The test example provides application of a flocculating agent for treating mine beneficiation wastewater in acid drainage treatment engineering generated by mine beneficiation, and the flocculating agent comprises the following steps:
the flocculants prepared in example 2 and comparative example 2 are respectively applied to an acid drainage treatment reaction device or reaction unit generated in mine beneficiation.
The experimental results show that: certain mineral processing acid drainage has pH of 3.5 and contains Al3+、Cu2+、Zn2+、SO4 2-The concentrations of (A) were 90mg/L, 80mg/L, 50mg/L and 300mg/L, respectively. When the flocculating agents of the embodiment 2 and the comparative example 2 of the invention are respectively added with 10mg/L and 10mg/L, the pH of the effluent is respectively increased to 6.9 and 5.1, Al3+、Cu2+、Zn2+、SO4 2-The concentration of (B) was reduced to 11mg/L, 0.9mg/L, 12mg/L, 30mg/L and 17mg/L, 4.9mg/L, 14mg/L, 47mg/L, respectively. From the comparison of the results of use of example 2 and comparative example 2, it is clear that calcium oxide plays an important role in the treatment of acidic drainage produced by mine beneficiation, especially in the adjustment of pH, which is indispensable in the flocculant of the present invention. In the removal of ions, calcium hydroxide floc generated by calcium oxide plays a certain role in the removal efficiency of various ions.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (10)
1. The flocculant for treating mine beneficiation wastewater is characterized by comprising the following components in percentage by weight, based on 100 percent by weight of the total weight of the flocculant for treating mine beneficiation wastewater:
2. the flocculant for mine beneficiation wastewater treatment according to claim 1, wherein the modified starch comprises one or more of carboxylic acid type amphoteric starch, phosphoric acid type amphoteric starch, and sulfopropionic acid type amphoteric starch.
3. The flocculant for mine beneficiation wastewater treatment according to claim 1, wherein the modified chitosan comprises one or more of 2-hydroxypropyl trimethyl ammonium chloride chitosan, carboxymethyl chitosan and sodium xanthate chitosan.
4. The flocculant for mine beneficiation wastewater treatment according to claim 1, wherein the bentonite comprises one or more of organically modified bentonite, pillared bentonite and calcined modified bentonite.
5. The flocculant for treating mine beneficiation wastewater according to claim 1, wherein the mesh number of the bentonite is not less than 300 meshes; the mesh number of the aluminum sulfate is not less than 200 meshes; the mesh number of the ferrous sulfate is not less than 200 meshes; the mesh number of the calcium oxide is not less than 300 meshes; the mesh number of the calcium carbonate is not less than 200 meshes; the mesh number of the modified chitosan is not less than 100 meshes; the mesh number of the modified starch is not less than 100 meshes.
6. A preparation method of the flocculant for treating mine beneficiation wastewater according to any one of claims 1 to 5, characterized by comprising the following steps:
1) uniformly mixing bentonite, modified chitosan and modified starch in proportion to obtain a mixture A;
2) mixing and stirring the mixture A and water to obtain a suspension; drying the suspension to obtain a mixture B;
3) grinding the mixture B to enable the mesh number of the mixture B to be not less than 300 meshes to obtain a mixture C;
4) and uniformly mixing the mixture C, aluminum sulfate, calcium oxide, alkali lignin, calcium carbonate and ferrous sulfate to obtain the flocculant for treating the mine beneficiation wastewater.
7. The preparation method of the flocculant for treating mine beneficiation wastewater according to claim 6, wherein the mass ratio of the mixture A to the water in the step 2) is 1: 30-40.
8. The preparation method of the flocculant for treating mine beneficiation wastewater according to claim 6, wherein the stirring conditions in the step 2) are as follows: stirring at a rotating speed of 50-100 rpm for more than 15 min; the drying conditions in the step 2) are as follows: drying for 30-48 h at 50-70 ℃.
9. The preparation method of the flocculant for treating mine beneficiation wastewater according to claim 6, wherein the mixture C, aluminum sulfate, calcium oxide, alkali lignin, calcium carbonate and ferrous sulfate has a mixing uniformity of 99% or more.
10. Use of a flocculant according to any one of claims 1 to 5 for treatment of mine beneficiation wastewater to treat mine beneficiation wastewater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN111573801A (en) * | 2020-04-30 | 2020-08-25 | 广西夏阳环保科技有限公司 | Organic composite aluminum sulfate water treatment agent and preparation method thereof |
| CN113336306A (en) * | 2021-06-17 | 2021-09-03 | 江苏坤佳环境科技有限公司 | Environment-friendly mineral flocculant |
| RU2808870C1 (en) * | 2023-10-13 | 2023-12-05 | Федеральное государственное автономное образовательное учреждение высшего образования "Северный (Арктический) федеральный университет имени М. В. Ломоносова" | Reagent for clarification of clay suspension |
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| CN111573801A (en) * | 2020-04-30 | 2020-08-25 | 广西夏阳环保科技有限公司 | Organic composite aluminum sulfate water treatment agent and preparation method thereof |
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Application publication date: 20200421 |