CN112851282A - Gelling agent for solidifying heavy metal ions in tailings and application method thereof - Google Patents
Gelling agent for solidifying heavy metal ions in tailings and application method thereof Download PDFInfo
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- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/141—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing dihydrated gypsum before the final hardening step, e.g. forming a dihydrated gypsum product followed by a de- and rehydration step
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- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
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- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
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- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
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- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/16—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing anhydrite, e.g. Keene's cement
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
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- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00767—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes
- C04B2111/00775—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes the composition being used as waste barriers or the like, e.g. compositions used for waste disposal purposes only, but not containing the waste itself
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a gelling agent for solidifying heavy metal ions in tailings and a using method thereof, wherein the gelling agent comprises the following components in percentage by mass: 0.25-0.7% of a chelating capturing agent, 0.15-0.3% of a chelating accelerant, 0.2-0.6% of a complexing early strength agent, 1-7% of lime, 0-10% of cement, 8-20% of gypsum, 0-20% of steel slag micropowder and 50-82% of slag micropowder. The chelating accelerator and the complexing early strength agent of the chelating catcher are uniformly mixed and then are uniformly mixed with other components. The gelling agent prepared by the invention not only gels the whole tailings through hydration reaction to realize filling exploitation, but also synergistically solidifies heavy metal ions in the tailings through various actions such as leaching, chelating, coating, chemical adsorption, chemical passivation, ion substitution and the like, keeps the stability of solidification for a long time, is particularly suitable for full-tailings cemented filling with high content of heavy metal ions, and obviously reduces the environmental risk of high content of heavy metal ions in the filled tailings.
Description
Technical Field
The invention belongs to the field of solid waste cementing material preparation technology, and particularly relates to a gelling agent for solidifying heavy metal ions in tailings, which can be used for solidifying and stabilizing the heavy metal ions in tailing filling, can also be widely applied to solidification and stabilization of the heavy metal ions in tailing dry heaps and metallurgical slag dressing fields, and is particularly suitable for solidifying and stabilizing the tailings containing harmful elements of Pb, Cd, Zn, Mn and S.
Background
The development of mineral resources is one of the important ways of continuous development of human beings and society, along with the continuous exploitation of mineral resources, the pollution and damage of metal tailings to the ecological environment become an important problem of global attention, especially the heavy metal pollution in the tailings is a serious problem to be solved urgently, heavy metals in the tailings are continuously dissolved out under the condition of natural environment and enter surface water, underground water and soil, irreversible pollution and damage are caused to the ecological environment, and meanwhile, the great threat is caused to the health of human beings. Because the heavy metal pollution has the characteristics of latency, irreversibility, long-term property, serious influence effect and the like, the research and the treatment of the heavy metal pollution of the tailings are highly valued in the fields of domestic and foreign ecology and environmental science.
The filling mining method is characterized in that waste rocks generated by mining and/or tailings generated by mineral separation are backfilled into a goaf for cementing and curing, has the advantages of small loss rate, low dilution rate, ground pressure control, surface protection, tailing reservoir elimination and the like, and becomes a main method for underground mining under the conditions that the environmental protection requirement for mineral resource development is higher and mineral resources are gradually reduced in China. The cementing material used as an important filling raw material is developed into a special cementing material taking grain slag micro powder as a main component from cement used for graded filling, so that the problem that the cement is difficult to cement whole tailings or the strength is too low is solved, and the whole tailing filling is popularized and applied.
For example, the chinese granted patent application 202010772265.9 discloses a tailing based cementitious material and a method of making the same. The method comprises the steps of drying a tailing raw material, and sequentially carrying out mechanical ball milling activation treatment, thermal activation treatment and chemical agent activation treatment to obtain the tailing-based gelling material. According to the method, tailings are activated by a combined excitation method of mechanical activation, thermal activation and chemical activation, and a cementing material with good cementing property is obtained by utilizing the potential pozzolanic activity of the tailings, wherein the highest compressive strength of the consolidated cementing material can reach 10 MPa. But the production process of the cementing material is complex, the production cost is high, and the market competitiveness is low.
For another example, the chinese patent application CN102924005A discloses a method for producing mine cemented filling material with micro-expansion effect by using industrial waste slag such as steel slag, water-quenched blast furnace slag and the like as main raw materials, which comprises grinding the raw materials such as steel slag, gypsum and the like to a specific surface area of 400 square meters per liter and adding 0.5-1% of water reducing agent. Under the conditions of filling concentration of 75% and sand-lime ratio of 1:4, the strength of about 12MPa in 28 days is achieved, the strength is high, and the performance is good. The method has the defects that the filling concentration is up to 75%, the concentration of the existing mine filling station concentration equipment cannot reach the high concentration in industrial large-scale production, the ash-sand ratio is up to 1:4, the use amount of a cementing material is large, and the use cost is high.
The application of the patents well solves the problems of filling strength, solid waste utilization and the like, but the solidification of heavy metal ions in tailings is not described. The filling cementing material generally carries out hydration reaction under alkaline condition, cements and solidifies tailings, and calcium silicate hydrate is produced through the reactionCalcium silicate hydrate is in a net or honeycomb structure, has a large specific surface area, and can adsorb heavy metal ions in a dissolved state; the ettringite has needle or column structure, and when the components are changed in the form of ion exchange, the structure of the ettringite is not changed, and the ion exchange can occur in Ca2+And Al3+In position (2) of (2), Ca2+Can be substituted by a number of divalent cations such as: pb2+、Zn2+、Cr3+And Cd2+Etc.; under the alkaline condition, heavy metal ions are easy to generate hydroxide and sulfide precipitates which are insoluble in water, so that heavy metals in tailings are well solidified.
However, when the filling body is subjected to sulfate erosion, carbonization, thiobacillus oxidation and the like, the C-S-H and ettringite structures are damaged, and heavy metal ions are released again. With the further improvement of the national environmental protection requirement, the heavy metal ions in the filling body are released again, which may cause the problems exceeding the relevant standards and regulations, and influence the survival and development of enterprises; furthermore, heavy metal ion migration in the pack can also present potential environmental concerns.
Disclosure of Invention
The invention aims to solve the problems of high production cost, large use amount and high use cost in the prior art and the problems of solidification and stabilization of heavy metal in tailings are not considered, and provides a gelling agent for solidifying heavy metal ions in tailings, which is used for treating heavy metal pollution in tailing filling, tailing dry heaps or metallurgical slag dressing fields, has excellent cementing performance, also strengthens anti-carbonization and anti-acid decomposition performance by various actions such as chelation and the like in a targeted manner, keeps the stability of the solidified heavy metal ions for a long time and avoids the migration of the heavy metal ions.
It is another object of the present invention to provide a method of using a gelling agent for solidifying heavy metal ions in tailings.
In order to achieve the above purpose of the present invention, the gelling agent for solidifying heavy metal ions in tailings adopts the following technical scheme:
the invention relates to a gelling agent for solidifying heavy metal ions in tailings, which comprises the following components in percentage by mass: 0.25-0.7% of a chelating capturing agent, 0.15-0.3% of a chelating accelerator, 0.2-0.6% of a complexing early strength agent, 1-7% of lime, 0-10% of cement, 8-20% of gypsum, 0-20% of steel slag micropowder and 50-82% of slag micropowder; the amount of the chelate capture agent, the chelate promoter and the complexing early strength agent accounts for 0.8-1.4% of the total mass of the components in the raw materials; the preparation process comprises the following steps of;
and (2) metering and uniformly stirring the chelating capture agent, the chelating accelerant and the complexing early strength agent according to the mass ratio to prepare a mixture M, and then mixing and homogenizing the mixture M, the alkali activator, the cement, the activator, the steel slag micro powder and the slag micro powder to prepare the gelling agent C for solidifying heavy metal ions in the tailings.
The raw materials preferably comprise the following components in percentage by mass: 0.3-0.6% of a chelating capturing agent, 0.16-0.26% of a chelating accelerant, 0.35-0.6% of a complexing early strength agent, 2-6% of lime, 0-10% of cement, 8-20% of gypsum, 0-15% of steel slag micropowder and 65-80% of slag micropowder.
The chelating trapping agent is dithiocarbamate, and can be one or more of dimethyl dithiocarbamate, Diethyl Dithiocarbamate (DDTC), dibutyl dithiocarbamate (SDBC), diisobutyl dithiocarbamate and dipentyl dithiocarbamate.
The chelating accelerator is dithiocarbamate star hyperbranched polymer, and trimethylolpropane triacrylate core dithiocarboxylate star hyperbranched polymer (TMPTA/ADA-9CSSM) is preferred, and the substance is shown in patent CN201410520218. X. The chelate capture agent reacts with heavy metal ions to form a water-insoluble heavy metal chelate with good acid and alkali resistance. The polymer is slightly soluble in water, less participates in the formation of heavy metal chelate in the early stage, and is uniformly distributed in the gel, when the gel is carbonized or subjected to S oxidation acidification, the gel structure is damaged, heavy metal ions are released again, the released heavy metal ions react with the chelate capture agent to generate more stable heavy metal chelate, and the migration of the heavy metal ions is avoided.
The complexing early strength agent is calcium acetate, the purity of the calcium acetate is more than or equal to 95 percent, and the granularity is less than or equal to 0.076 mm. The calcium acetate is calcium acetate monohydrate or anhydrous calcium acetate, acetate is good complex ions, and forms a water-soluble complex with various heavy metal ions, and the complex reacts with the boiled catching agent to form a stable water-insoluble heavy metal chelate; and meanwhile, calcium acetate promotes hydration reaction of tricalcium silicate, thus being beneficial to formation of ettringite and improving the early strength of the filling body.
The invention selects lime as a soda activator, the mass content of effective calcium in the lime is more than or equal to 90 percent, the granularity is less than or equal to 0.076mm, the lime firstly reacts with water to change the water content between particles, calcium oxyhydroxide generated by the reaction has stronger alkalinity and can destroy SiO2And Al2O3Ca on the surface of the particles to promote the hydration reaction and the volcanic ash reaction of the slag micro powder and the steel slag micro powder2+Can be combined with AL3+、SO4 2-Reacting to generate ettringite to form early strength; the cement is ordinary portland cement with the number being more than or equal to 425#, has good self-hydration reaction performance, can perform cementation and solidification on heavy metal, heavy metal ions can enter a crystal grid through ion exchange, and alkaline substances generated by the hydration reaction further activate the reaction activity of the slag micro-powder and the steel slag micro-powder; the cement is ordinary Portland cement with the number not less than 425 #.
The steel slag micro powder is prepared by grinding steel slag powder into steel slag powder with specific surface area more than or equal to 420m2the/L micro powder is powder produced by grinding and milling steel slag through a pipe, is a main auxiliary material of steel slag cement, can be activated by alkali or sulfate, can provide longer strength increase period, can inhibit alkali aggregate reaction, and has the characteristics of compactness and sulfate corrosion resistance; the slag micro powder is water quenched slag powder and is ground into powder with the specific surface area of more than or equal to 390m2the/L micro powder is powder produced by grinding slag through a vertical mill or a tube mill, has the grade of S95 or S105, is a main auxiliary material of slag cement, can be activated by alkali or sulfate, has strong activity, and can provide proper early strength and later strength.
The activating agent adopted by the invention is gypsum, generally one, any two or three of natural dihydrate gypsum, semi-hydrated gypsum or anhydrous gypsum or desulfurized gypsum dried at 110-120 ℃ is selected, and the purity is more than or equal to 90%.
The application method of the gelling agent for solidifying the heavy metal ions in the tailings comprises the following steps: in the filling of underground mine tailings, a gelling agent C for solidifying heavy metal ions in the tailings is added into tailing pulp, the mass concentration of the tailing pulp is controlled to be 60-72%, and the ash-sand ratio is controlled to be 1: 7-1: 10 range.
The optimized technological parameters are as follows: the mass concentration of the tailing pulp is controlled to be 62-68%, and the ash-sand ratio is controlled to be 1: 8-1: and 9 ranges.
Compared with the prior art, the gelling agent for solidifying heavy metal ions in tailings and the using method thereof have the following beneficial effects:
(1) the gelling agent for curing heavy metal ions in tailings can realize the combination of full-tailings cemented filling and heavy metal curing and stabilization, and the chemical passivation technology is adopted in a targeted manner to strengthen the effects of curing and stabilizing heavy metals, so that the requirement on the strength of a filling body can be met, and the heavy metal ions in the tailings can be cured and stabilized;
(2) the invention adopts a more stable chelating agent, the generated heavy metal chelate has strong acid and alkali impact resistance, and the PH value is more than or equal to 2;
(3) the slag micro powder and/or the slag micro powder form a more compact filling body, and have stronger capacities of resisting carbonization and sulfate erosion;
(4) the raw material of the gelling agent for solidifying the heavy metal ions in the tailings is basically industrial solid waste, the raw material source is wide, the preparation process is simple, the energy consumption is low, no carbon is discharged, the product demand is large, the gelling agent is a gelling material which is urgently needed for filling the tailings of metallurgical mines, particularly nonferrous metal mines, and better economic benefit, social benefit and environmental benefit can be brought.
(5) The gelling agent for solidifying the heavy metal ions in the tailings is used under the condition of tailing concentration of 60-72% in the application of tailing filling engineering, the concentration is commonly adopted in the existing underground mine filling, special concentration equipment is not needed, and the use is convenient.
(6) The invention discloses a gelling agent for solidifying heavy metal ions in tailings, which is applied to tailing filling engineering, wherein the ash-sand ratio is 1: 8-1: 9 range, low usage amount of the gelling agent and low use cost.
Detailed Description
To illustrate the present invention, the following examples are provided to further illustrate the gelling agent for solidifying heavy metal ions in tailings and the method of using the gelling agent. The invention is not limited to the examples.
The invention relates to a gelling agent for solidifying heavy metal ions in tailings, which is prepared by mixing the following raw materials in percentage by mass:
0.25-0.7% of a chelating capture agent, 0.15-0.3% of a chelating accelerator, 0.2-0.6% of a complexing early strength agent, 1-7% of an alkali activator, 0-10% of cement, 8-20% of an activator, 0-20% of steel slag micropowder and 50-82% of slag micropowder; the amount of the chelate capture agent, the chelate promoter and the complexing early strength agent accounts for 0.8-1.4% of the total mass of the components in the raw materials; the preparation process comprises the following steps of; the chelating capture agent, the chelating accelerant and the complexing early strength agent are metered and uniformly stirred according to the mass ratio to prepare a mixture M, and then the mixture M is mixed and homogenized with the alkali activator, the cement, the activator, the steel slag micro powder and the slag micro powder to prepare the gelling agent C for curing the heavy metal ions in the tailings.
Wherein: the chelating trapping agent adopts sodium diethyldithiocarbamate (DDTC for short), the chelating accelerator adopts trimethylolpropane triacrylate core dithiocarboxylate star hyperbranched polymerization (TMPTA/ADA-9CSSM for short), the complexing early strength agent adopts calcium acetate, the alkali activator adopts quicklime, and the activator adopts dihydrate gypsum. The purity of the calcium acetate is more than or equal to 95 percent, and the granularity is less than or equal to 0.076 mm; the mass content of the effective calcium in the quicklime is more than or equal to 90 percent, and the granularity is less than or equal to 0.076 mm; the cement is ordinary portland cement with the number not less than 425 #; the steel slag micro powder is ground into steel slag powder with specific surface area more than or equal to 420m2L of micro powder; the slag micro powder is water quenchedGrinding the slag powder into powder with specific surface area more than or equal to 390m2Fine powder of/L.
In practical application, the chelate capture agent, the chelate promoter and the early strength complexing agent are statically weighed according to 0.25-0.7%, 0.15-0.3% and 0.2-0.6% of the total weight, and are uniformly mixed to prepare a mixture A, wherein the weight of the mixture A is controlled to be 0.8-1.5% of the total weight of the raw materials; and then mixing and homogenizing the mixture A, an alkali activator, cement, an activator, steel slag micro powder and slag micro powder to prepare the gelling agent for curing heavy metal ions in tailings.
In laboratory research, the gelatinizing agent C for solidifying heavy metal ions in tailings is uniformly mixed with tailing slurry with a certain water content according to a certain proportion to prepare the experimental slurry similar to filling slurry. Pouring the uniformly mixed slurry into a test mold of 70.7 multiplied by 70.7 according to the national standard GB/T17671-1999, curing under the conditions of 20 +/-1 ℃ and 90% +/-5% humidity after demolding, and carrying out uniaxial compressive strength detection and heavy metal leaching detection in different curing periods of 3 days, 7 days and 28 days.
In the filling of underground mine tailings, adding a gelling agent C for solidifying heavy metal ions in tailings into tailing pulp in the filling of underground mine tailings, wherein the mass concentration of the tailing pulp is controlled to be 60-72%, and the ash-sand ratio is controlled to be 1: 7-1: 10 range. The mass concentration of the tailing pulp is about 65% generally; the sand-ash ratio is determined by tests according to the granularity of the tailings and the concentration of the ore pulp of the tailings. The concentration of tailing slurry is low, the granularity of tailings is fine, and the ash-sand ratio is generally 1: 9-1: 10 range; the tailing slurry is high in concentration and coarse in tailing granularity, and the ash-sand ratio is generally 1: 7-1: and 8 ranges.
Crushing the test block subjected to uniaxial compressive strength detection, taking a sulfuric acid solution as an extracting agent, adjusting the pH value of deionized water put into an extracted sample to be 2 +/-0.05, and carrying out heavy metal leaching detection on the filling body according to a leaching procedure of a sulfuric acid-nitric acid method (HJT299-2007) which is a solid waste leaching toxicity leaching method. The test results are as in examples 1 to 6.
From examples 1 to 6, it can be seen that after the test samples are leached according to the sulfuric acid-nitric acid method (HJT299-2007) in the leaching method of leaching toxicity from solid wastes, Pb, Cu, Zn, Cd, As and the like in the leachate are far below the emission standard limit requirements. In examples 3 to 6, TMPTA/ADA-9CSSM is represented by TM.
Example 1
Example 2
Example 3
Example 4
Example 5
Example 6
The gelling agent for solidifying heavy metal ions in tailings, developed by the invention, is subjected to industrial tests in a certain lead-zinc mine tailing mining filling project, tailings are filled and solidified for 28 days for sampling, and after leaching is carried out by adopting a sulfuric acid-nitric acid method (HJT299-2007) which is a solid waste leaching toxicity leaching method, Pb, Cd, Zn, Cd and As in a leaching solution are respectively 0.012mg/L, 0.0042mg/L, 0.18mg/L, 0.005mg/L and 0.09mg/L which are far lower than the identification standard limit value of hazardous waste leaching toxicity, so that unexpected technical effects are obtained.
Claims (9)
1. The gelling agent for solidifying the heavy metal ions in the tailings is characterized by comprising the following components in percentage by mass: 0.25-0.7% of a chelating capturing agent, 0.15-0.3% of a chelating accelerator, 0.2-0.6% of a complexing early strength agent, 1-7% of lime, 0-10% of cement, 8-20% of gypsum, 0-20% of steel slag micropowder and 50-82% of slag micropowder; the amount of the chelate capture agent, the chelate promoter and the complexing early strength agent accounts for 0.8-1.4% of the total mass of the components in the raw materials; the preparation process comprises the following steps of;
and (2) metering and uniformly stirring the chelating capture agent, the chelating accelerant and the complexing early strength agent according to the mass ratio to prepare a mixture M, and then mixing and homogenizing the mixture M, the alkali activator, the cement, the activator, the steel slag micro powder and the slag micro powder to prepare the gelling agent C for solidifying heavy metal ions in the tailings.
2. The gelling agent for solidifying heavy metal ions in tailings as claimed in claim 1, wherein the raw material comprises the following components in percentage by mass: 0.3-0.6% of a chelating capturing agent, 0.16-0.26% of a chelating accelerant, 0.35-0.6% of a complexing early strength agent, 2-6% of lime, 0-10% of cement, 8-20% of gypsum, 0-15% of steel slag micropowder and 65-80% of slag micropowder.
3. The gelling agent for solidifying heavy metal ions in tailings as claimed in claim 1 or 2, wherein: the chelate capture agent is dithiocarbamate, and the chelate accelerator is dithiocarbamate star-shaped hyperbranched polymer.
4. The gelling agent for solidifying heavy metal ions in tailings as claimed in claim 3, wherein: the complexing early strength agent is calcium acetate, the purity of the calcium acetate is more than or equal to 95 percent, and the granularity is less than or equal to 0.076 mm.
5. The gelling agent for solidifying heavy metal ions in tailings of claim 4, wherein: the mass content of the effective calcium in the lime is more than or equal to 90 percent, and the granularity is less than or equal to 0.076 mm; the cement is ordinary Portland cement with the number not less than 425 #.
6. The gelling agent for solidifying heavy metal ions in tailings of claim 5, wherein: the steel slag micro powder is prepared by grinding steel slag powder into steel slag powder with specific surface area more than or equal to 420m2L of micro powder; the slag micro powder is water quenched slag powder and is ground into powder with the specific surface area of more than or equal to 390m2Fine powder of/L.
7. The gelling agent for solidifying heavy metal ions in tailings of claim 6, wherein: the gypsum is one, any two or three of natural dihydrate gypsum, semi-hydrated gypsum or anhydrous gypsum, or desulfurized gypsum dried at 110-120 ℃, and the purity is more than or equal to 90%.
8. The use of the gelling agent for solidifying heavy metal ions in tailings of claim 7, wherein: in the filling of underground mine tailings, a gelling agent C for filling the tailings containing heavy metals is added into tailing pulp, the mass concentration of the tailing pulp is controlled to be 60-72%, and the ash-sand ratio is controlled to be 1: 7-1: 10 range.
9. The use of the gelling agent for solidifying heavy metal ions in tailings of claim 8, wherein: the mass concentration of the tailing pulp is controlled to be 62-68%, and the ash-sand ratio is controlled to be 1: 8-1: and 9 ranges.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110110115.6A CN112851282A (en) | 2021-01-27 | 2021-01-27 | Gelling agent for solidifying heavy metal ions in tailings and application method thereof |
| PCT/CN2021/115999 WO2022160711A1 (en) | 2021-01-27 | 2021-09-01 | Gelling agent for curing heavy metal ions in tailings and use method thereof |
| ZA2022/04721A ZA202204721B (en) | 2021-01-27 | 2022-04-28 | Cementing agent for solidifying heavy metal ions in tailings and use method thereof |
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| CN202110110115.6A CN112851282A (en) | 2021-01-27 | 2021-01-27 | Gelling agent for solidifying heavy metal ions in tailings and application method thereof |
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| Country | Link |
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| CN (1) | CN112851282A (en) |
| WO (1) | WO2022160711A1 (en) |
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| WO2022160711A1 (en) * | 2021-01-27 | 2022-08-04 | 中钢集团马鞍山矿山研究总院股份有限公司 | Gelling agent for curing heavy metal ions in tailings and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114956651B (en) * | 2021-12-30 | 2023-06-13 | 中国石油天然气集团有限公司 | Early-strength material for cement paste system, cement paste composition, cement paste system, preparation method and application of early-strength material |
| CN115504712A (en) * | 2022-09-09 | 2022-12-23 | 北京交通大学 | Geopolymer material solidified with heavy metal ions and preparation method thereof |
| CN116063059B (en) * | 2023-01-17 | 2023-10-27 | 青岛理工大学 | Roadbed filler for solidifying iron tailings and roadbed construction method |
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