CN114236096A - Comprehensive analysis and evaluation method for activity of mine tailings - Google Patents
Comprehensive analysis and evaluation method for activity of mine tailings Download PDFInfo
- Publication number
- CN114236096A CN114236096A CN202111520407.3A CN202111520407A CN114236096A CN 114236096 A CN114236096 A CN 114236096A CN 202111520407 A CN202111520407 A CN 202111520407A CN 114236096 A CN114236096 A CN 114236096A
- Authority
- CN
- China
- Prior art keywords
- tailings
- activity
- analysis
- analysis method
- analyzing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000000694 effects Effects 0.000 title claims abstract description 94
- 238000004458 analytical method Methods 0.000 title claims abstract description 59
- 238000011156 evaluation Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 97
- 239000004568 cement Substances 0.000 claims abstract description 57
- 239000000463 material Substances 0.000 claims abstract description 30
- 239000000126 substance Substances 0.000 claims abstract description 21
- 238000002076 thermal analysis method Methods 0.000 claims abstract description 20
- 238000007415 particle size distribution analysis Methods 0.000 claims abstract description 19
- 238000004445 quantitative analysis Methods 0.000 claims abstract description 19
- 238000006703 hydration reaction Methods 0.000 claims abstract description 15
- 238000010998 test method Methods 0.000 claims abstract description 11
- 230000036571 hydration Effects 0.000 claims abstract description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 45
- 239000011707 mineral Substances 0.000 claims description 45
- 238000005979 thermal decomposition reaction Methods 0.000 claims description 41
- 239000002245 particle Substances 0.000 claims description 30
- 230000004580 weight loss Effects 0.000 claims description 24
- 238000012360 testing method Methods 0.000 claims description 16
- 238000002441 X-ray diffraction Methods 0.000 claims description 15
- 230000001360 synchronised effect Effects 0.000 claims description 14
- 229910052749 magnesium Inorganic materials 0.000 claims description 12
- 229910052710 silicon Inorganic materials 0.000 claims description 12
- 229910052791 calcium Inorganic materials 0.000 claims description 11
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 10
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 239000013078 crystal Substances 0.000 claims description 8
- 239000012298 atmosphere Substances 0.000 claims description 6
- 238000003837 high-temperature calcination Methods 0.000 claims description 6
- 238000002715 modification method Methods 0.000 claims description 6
- 238000012512 characterization method Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000001938 differential scanning calorimetry curve Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 0.000 claims 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims 1
- 238000001506 fluorescence spectroscopy Methods 0.000 claims 1
- 239000010452 phosphate Substances 0.000 claims 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims 1
- 239000002910 solid waste Substances 0.000 abstract description 10
- 230000004913 activation Effects 0.000 abstract description 7
- 230000004048 modification Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 abstract description 2
- 238000004451 qualitative analysis Methods 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 239000011777 magnesium Substances 0.000 description 11
- 239000011575 calcium Substances 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 10
- 238000011049 filling Methods 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 8
- 239000010949 copper Substances 0.000 description 8
- 239000004576 sand Substances 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 7
- 238000005065 mining Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 239000002131 composite material Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 238000004846 x-ray emission Methods 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 5
- 239000010453 quartz Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000010459 dolomite Substances 0.000 description 4
- 229910000514 dolomite Inorganic materials 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 239000002344 surface layer Substances 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 238000004876 x-ray fluorescence Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- 238000003991 Rietveld refinement Methods 0.000 description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910001919 chlorite Inorganic materials 0.000 description 2
- 229910052619 chlorite group Inorganic materials 0.000 description 2
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 238000012932 thermodynamic analysis Methods 0.000 description 2
- 238000002411 thermogravimetry Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910004860 CaZn Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
- G01N23/207—Diffractometry using detectors, e.g. using a probe in a central position and one or more displaceable detectors in circumferential positions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/223—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
Abstract
The invention discloses a comprehensive analysis and evaluation method for activity of mine tailings. The comprehensive analysis and evaluation method mainly comprises a chemical component analysis method, a particle size distribution analysis method, a thermal analysis method, a phase quantitative analysis method and a cement bond tailing strength test method. By means of the synergistic analysis of the five methods, qualitative and quantitative analysis of activity of the volcanic ash in the bulk industrial solid wastes such as mine tailings and the like can be achieved. The comprehensive analysis and evaluation method for the activity of the mine tailings, which is established by the invention, can analyze the hydration activity of the volcanic ash of various tailings, evaluate the potential of the volcanic ash for material utilization, provide the most reasonable modification and activation method for the tailings through analysis data, and improve the possibility of further resource utilization of the tailings.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and relates to the field of performance analysis and resource utilization of bulk industrial solid waste materials.
Background
Mine mining and mineral processing provide a large amount of precious resources for industrial production in China, and have an indispensable position. However, a large amount of tailings is produced during mining operations and the like. The tailings are residual wastes after crushing and grinding the blocky ores and extracting valuable chemical components from the blocky ores, and are industrial solid wastes. At present, the disposal method aiming at the tailings is mainly stockpiling or cementing and backfilling the tailings in the goaf by using traditional cementing materials such as cement and the like. The stockpiling can occupy a large amount of land resources, and heavy metals in the tailing pond can be released and migrated, so that serious environmental pollution is caused. The problems of filling body layering, low strength and the like can be solved by adopting cement cemented backfilling.
For the bulk industrial solid wastes, the best disposal mode is to utilize the wastes as resources, so that the stockpiling of the solid wastes can be greatly reduced, and considerable economic benefits can be brought. In general, the resource utilization mode of tailings is mainly as follows: 1. and (2) carrying out tailing recleaning to recover valuable metals, 2, manufacturing building materials by using tailings, and 3, filling a goaf of the mine by using the tailings. However, in general, the cement dosage must be increased to achieve good stability by adopting cement bond filling, otherwise, the problems of cracking, sinking, diking and the like can occur, which causes serious safety accidents, however, the cost is increased and the economic benefit is reduced due to the large use of cement. Therefore, the focus of current research is to add slag, tailings and other bulk industrial solid wastes into a cement system as an admixture of ordinary portland cement in a specific mixing amount, examine the influence of the bulk industrial solid wastes on the hydration hardening of the ordinary portland cement and the activity excitation effect of the cement on the bulk solid wastes, and if the effect is good, the resource utilization of the bulk industrial solid wastes can be achieved, the use of the cement in the mining and filling industry can be reduced, and the tailing treatment cost is reduced.
In order to achieve a better resource utilization effect, the activity of tailings is very critical, and tailings with high activity are easier to interact with a cementing material to generate a physicochemical reaction, so that a stable product is generated, a stable combination is formed, the strength performance of the cemented filling of the tailings is improved, the filling quality is guaranteed, and the unit disposal quantity of the tailings is improved, so that a scientific comprehensive analysis and evaluation method for the activity of mine tailings is very necessary to establish.
Disclosure of Invention
At present, a cement bond tailing strength comparison test method is mainly adopted for researching hydration activity of tailings, or a certain analysis characterization method is combined, so that the tailings are messy, not systematized and not fine enough, therefore, the invention constructs an ore tailing activity comprehensive analysis and evaluation method, combines the traditional method with the modern analysis characterization technology, analyzes the hydration activity of the tailings through quantitative and qualitative index comparison, provides an optimal activation scheme for different types of tailings, realizes reclamation, reduction and harmlessness of a large amount of industrial solid wastes, and protects the surrounding and underground ecological environment of a tailing reservoir area.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a comprehensive analysis and evaluation method for mine tailing activity is characterized by comprising the following steps: the method specifically comprises five methods, namely a chemical component analysis method, a particle size distribution analysis method, a thermal analysis method, a phase quantitative analysis method, a cement bond tailing strength test method and the like.
Preferably, the chemical component analysis method can obtain the relative content of each element in the mine tailings through chemical component analysis, and mainly adopts modern analysis and characterization technologies such as an X-ray diffraction method (XRD) and an X-ray fluorescence spectrometry (XRF), the higher the content of the main active element is, the higher the activity of the mineral material is possibly, and for a gelled material system, the content of four elements of Ca, Si, Al and Mg is an important factor for determining the activity of the mineral material. The higher these elements in the tailings, the greater the likelihood of the tailings participating in the hydration reaction to form hydrated aluminosilicates (C-S-H gels).
Preferably, the particle size distribution analysis method mainly analyzes the particle size of the tailing particles, the particle size distribution analysis method mainly adopts a laser particle sizer to analyze the particle size distribution of the original tailing, under normal conditions, the influence of the tailing particle size on the compressive strength of a solidified body is large, and according to the tailing D, the method is characterized in that50The median diameter value can divide the tailings into the following types: 1) d50>80 μm, belonging to extra coarse tailings (sand); 2)45 μm<D50Less than or equal to 80 mu m, belongs to coarse tailings (sand); 3)20 μm<D50Less than or equal to 45 mu m, belongs to fine tailings (sand); 4)10 μm<D50 is less than or equal to 20 mu m, belonging to superfine tailings (sand). The finer the particle size of the tailing particles, the higher the possibility that the tailing particles participate in the reaction in a cement hydration system, and meanwhile, the finer the particle size, the higher the thermal decomposition weight loss rate, and the smaller the heat demand for completing the thermal decomposition.
Preferably, in the application of the thermal analysis method to the inorganic non-metallic material, not only can the change of physical properties of the material under the change of temperature be known, but also the conditions of oxidation, reduction, decomposition, dehydration and the like of the material can be studied, and the phase change rule of the material in the process of heating up and heating can be known, so that the thermodynamic activity excitation potential of the inorganic non-metallic material can be determined, and in general, for a mineral admixture, if the thermogravimetric weight loss rate of the material is too low, the pozzolanic activity of the material is low. The thermal analysis method mainly adopts a synchronous thermal analyzer of German Steady instruments company, in N2Under the atmosphere, the flow rate is 50mL/min, the temperature rise rate is 10K/min, and the temperature is increased from the room temperatureHeating to 1000 ℃, and analyzing TG, DTG and DSC curves of the tailings by performing synchronous thermal analysis (TG-DTG-DSC) on the tailings and analyzing the TG, DTG and DSC curves of the tailings, so that the high-temperature calcination weight loss rate, the thermal decomposition rate, the heat demand and the like of the tailings can be further researched, and the volcanic ash activity of the tailings can be analyzed and compared.
Preferably, the phase quantitative analysis method can be used for analyzing the relative content of specific mineral components in tailings when the mineral components of the tailings are simple and have regular crystal forms and less amorphous impurities, the specific phase quantitative analysis method comprises an X-ray diffraction semi-quantitative fine modification method, an X-ray fluorescence spectrometry method and a TG-DTG-DSC method, and the method is used for analyzing the tailings with single mineral components by the X-ray diffraction semi-quantitative fine modification method to determine the mineral phases and the relative content in the tailings. The phase quantitative analysis method mainly adopts a Rietveld method, the tailings only contain a crystal phase and the crystal phase structure information is known, and for silicate tailings with more complex mineral phase component structures, a differential thermal-thermogravimetric analysis method can be used for analyzing weight loss peaks and heat absorption valleys and determining corresponding mineral phases at the temperature by looking up documents so as to analyze the relative content of the mineral phases.
Preferably, the strength test method of the cement bonded tailings is to basically judge the basic activity of the tailings and the most appropriate activation mode after a particle size distribution analysis method, a chemical composition analysis method, a thermodynamic analysis method and a phase quantitative analysis method are carried out, so that a final activity verification test is carried out. The specific test operation flow is as follows:
s1) in a water-cement ratio of 1: under the condition of 1 (mass concentration is 50%), replacing 42.5-grade cement with 40% of replacement level of each tailing (cement accounts for 60%), weighing 400g of the total composite cementing material (cement 240g + tailing 160g), and weighing 400g of pure water;
s2) adding cement, tailings and pure water into a clean slurry stirrer in sequence, slowly stirring for 2min, quickly stirring for 2min, uniformly stirring the slurry, injecting a mold of 4cm multiplied by 4cm into a curing box, curing for 4h at constant temperature and humidity, demolding, and continuously curing for 28 days after marking;
s3), measuring the unconfined compressive strength of the test block after the test block reaches the specified age, and averaging to obtain the final compressive strength.
The invention also provides an analysis process of the comprehensive analysis and evaluation method for the activity of the mine tailings, which comprises the following steps:
s1) determining the main mineral components, the active element content and the particle size of the tailings by adopting a chemical component analysis method and a particle size distribution analysis method, and determining the types of the tailings, such as: the activity of the superfine carbonate tailings is preliminarily judged by using a mass coefficient and an alkali coefficient according to GB/T203-2008 'granulated blast furnace slag for cement';
s2) analyzing the thermal effect of main mineral powder components in the tailings by adopting a thermal analysis method, such as: the thermal decomposition weight loss rate, the maximum thermal decomposition rate and the thermal decomposition heat demand are high, if the thermal effect of the tailings is good, the mineral components of the tailings are more easily subjected to thermal decomposition in the heat release process of a cement hydration system, the decomposition products can further participate in the hydration reaction, and simultaneously, the activity of the tailings can be further improved by using a thermodynamic high-temperature calcination method, so that the material utilization is realized;
s3) further analyzing the relative content of main active mineral phases in the tailings by adopting a phase quantitative analysis method, wherein the higher the relative content is, the better the activity is theoretically;
s4) carrying out theoretical analysis through four methods of S1-S3, basically comparing and analyzing a group of tailings with the best volcanic ash activity, and finally analyzing and verifying the actual volcanic ash activity of the tailings by adopting a cement bond tailings strength test method.
The invention has the beneficial effects that:
the comprehensive evaluation method for the activity of the mine tailings covers various professional analysis and test technologies, can comprehensively analyze the activity of the tailings from multiple dimensions such as physical characteristics, chemical properties, phase component content and the like of the tailings, and carries out activity evaluation by combining actual industrial materials, and mutually verifies the previous and next analysis and evaluation methods, so that the method is more scientific and effective.
Meanwhile, the method can also optimize the appropriate activation modification mode of the tailings in combination with the analysis process while analyzing the activity of the tailings, because under normal conditions, most of the material components in the mine tailings are in an inert state and are not treated under certain conditions, and the activity of the tailings is difficult to excite, therefore, the tailings analyzed and evaluated by the method can obtain a further activation treatment method of the tailings on the basis of comprehensive analysis and test data, which is beneficial to realizing further resource utilization of the tailings, and can reduce the damage to the surrounding natural ecological environment caused by the stockpiling of the tailings in the mining process.
Drawings
FIG. 1 is a schematic diagram of a comprehensive analysis and evaluation method for mine tailing activity.
Detailed Description
A comprehensive analysis and evaluation method for mine tailing activity is characterized by comprising the following steps: the method specifically comprises five methods, namely a chemical component analysis method, a particle size distribution analysis method, a thermal analysis method, a phase quantitative analysis method, a cement bond tailing strength test method and the like.
Preferably, the chemical component analysis method can obtain the relative content of each element in the mine tailings through chemical component analysis, and mainly adopts modern analysis and characterization technologies such as an X-ray diffraction method (XRD) and an X-ray fluorescence spectrometry (XRF), the higher the content of the main active element is, the higher the activity of the mineral material is possibly, and for a gelled material system, the content of four elements of Ca, Si, Al and Mg is an important factor for determining the activity of the mineral material. The higher these elements in the tailings, the greater the likelihood of the tailings participating in the hydration reaction to form hydrated aluminosilicates (C-S-H gels).
Preferably, the particle size distribution analysis method mainly analyzes the particle size of the tailing particles, the particle size distribution analysis method mainly adopts a laser particle sizer to analyze the particle size distribution of the original tailing, under normal conditions, the influence of the tailing particle size on the compressive strength of a solidified body is large, and according to the tailing D, the method is characterized in that50The median diameter value can divide the tailings into the following types: 1) d50>80 μm, belonging to extra coarse tailings (sand); 2)45 μm<D50Less than or equal to 80 mu m, belongs to coarse tailings (sand); 3)20 μm<D50Less than or equal to 45 mu m, belongs to fine tailings (sand); 4)10 μm<D50 is less than or equal to 20 mu m and belongs to an ultrafine tailOre (sand). The finer the particle size of the tailing particles, the higher the possibility that the tailing particles participate in the reaction in a cement hydration system, and meanwhile, the finer the particle size, the higher the thermal decomposition weight loss rate, and the smaller the heat demand for completing the thermal decomposition.
Preferably, in the application of the thermal analysis method to the inorganic non-metallic material, not only can the change of physical properties of the material under the change of temperature be known, but also the conditions of oxidation, reduction, decomposition, dehydration and the like of the material can be studied, and the phase change rule of the material in the process of heating up and heating can be known, so that the thermodynamic activity excitation potential of the inorganic non-metallic material can be determined, and in general, for a mineral admixture, if the thermogravimetric weight loss rate of the material is too low, the pozzolanic activity of the material is low. The thermal analysis method mainly adopts a synchronous thermal analyzer of German Steady instruments company, in N2Under the atmosphere, the flow rate is 50mL/min, the temperature is increased from room temperature to 1000 ℃ at the temperature rise rate of 10K/min, the tailings are subjected to synchronous thermal analysis (TG-DTG-DSC), and the TG, DTG and DSC curves of the tailings are analyzed, so that the high-temperature calcination weight loss rate, the thermal decomposition rate, the heat demand and the like of the tailings can be further researched, and the volcanic ash activity of the tailings can be analyzed and compared.
Preferably, the phase quantitative analysis method can be used for analyzing the relative content of specific mineral components in tailings when the mineral components of the tailings are simple and have regular crystal forms and less amorphous impurities, the specific phase quantitative analysis method comprises an X-ray diffraction semi-quantitative fine modification method, an X-ray fluorescence spectrometry method and a TG-DTG-DSC method, and the method is used for analyzing the tailings with single mineral components by the X-ray diffraction semi-quantitative fine modification method to determine the mineral phases and the relative content in the tailings. The phase quantitative analysis method mainly adopts a Rietveld method, the tailings only contain a crystal phase and the crystal phase structure information is known, and for silicate tailings with more complex mineral phase component structures, a differential thermal-thermogravimetric analysis method can be used for analyzing weight loss peaks and heat absorption valleys and determining corresponding mineral phases at the temperature by looking up documents so as to analyze the relative content of the mineral phases.
Preferably, the strength test method of the cement bonded tailings is to basically judge the basic activity of the tailings and the most appropriate activation mode after a particle size distribution analysis method, a chemical composition analysis method, a thermodynamic analysis method and a phase quantitative analysis method are carried out, so that a final activity verification test is carried out. The specific test operation flow is as follows:
s1) in a water-cement ratio of 1: under the condition of 1 (mass concentration is 50%), replacing 42.5-grade cement with 40% of replacement level of each tailing (cement accounts for 60%), weighing 400g of the total composite cementing material (cement 240g + tailing 160g), and weighing 400g of pure water;
s2) adding cement, tailings and pure water into a clean slurry stirrer in sequence, slowly stirring for 2min, quickly stirring for 2min, uniformly stirring the slurry, injecting a mold of 4cm multiplied by 4cm into a curing box, curing for 4h at constant temperature and humidity, demolding, and continuously curing for 28 days after marking;
s3), measuring the unconfined compressive strength of the test block after the test block reaches the specified age, and averaging to obtain the final compressive strength.
The invention also provides an analysis process of the comprehensive analysis and evaluation method for the activity of the mine tailings, which comprises the following steps:
s1) determining the main mineral components, the active element content and the particle size of the tailings by adopting a chemical component analysis method and a particle size distribution analysis method, and determining the types of the tailings, such as: the activity of the superfine carbonate tailings is preliminarily judged by using a mass coefficient and an alkali coefficient according to GB/T203-2008 'granulated blast furnace slag for cement';
s2) analyzing the thermal effect of main mineral powder components in the tailings by adopting a thermal analysis method, such as: the thermal decomposition weight loss rate, the maximum thermal decomposition rate and the thermal decomposition heat demand are high, if the thermal effect of the tailings is good, the mineral components of the tailings are more easily subjected to thermal decomposition in the heat release process of a cement hydration system, the decomposition products can further participate in the hydration reaction, and simultaneously, the activity of the tailings can be further improved by using a thermodynamic high-temperature calcination method, so that the material utilization is realized;
s3) further analyzing the relative content of main active mineral phases in the tailings by adopting a phase quantitative analysis method, wherein the higher the relative content is, the better the activity is theoretically;
s4) carrying out theoretical analysis through four methods of S1-S3, basically comparing and analyzing a group of tailings with the best volcanic ash activity, and finally analyzing and verifying the actual volcanic ash activity of the tailings by adopting a cement bond tailings strength test method.
The following further illustrates embodiments of the invention:
example 1 comprehensive analysis and evaluation of surface tailing activity of Yunnan Dongchuan copper tailings
The method comprises the following steps:
(1) pretreating the surface layer tailings of the Yunnan Dongchuan copper tailing pond, and then carrying out X-ray fluorescence spectrum xrf and X-ray diffraction analysis xrd by using a chemical composition analysis method, wherein the analysis shows that the surface layer tailings of the Yunnan Dongchuan copper tailing pond have the calcium content of 22.10 percent (measured by an element stable oxidation state, the same below), the silicon content of 20.31 percent, the aluminum content of 3.1 percent, the magnesium content of 15.54 percent, the mass coefficient K of 1.93 and the alkaline coefficient M01.61, the main mineral phases in the tailings are dolomite, limestone and quartz stone, and the tailings belong to carbonate tailings;
(2) taking the surface layer tailings of the southeast China copper tailings to perform particle size distribution analysis by adopting a laser particle sizer, and finding the median diameter D in the tailings50101.4 mu m, belonging to extra coarse tailings, so that the tailings are extra coarse carbonate tailings;
(3) using a synchronous thermal analyser from German Steed instruments, in N2In an atmosphere, the flow rate is 50mL/min, the temperature is increased from room temperature to 1000 ℃ at the temperature rise rate of 10K/min, synchronous thermal analysis (TG-DTG-DSC) is carried out on the tailings, the tailings are detected to have a main weight loss peak at 625-813 ℃, the total weight loss rate is 34.82%, the main endothermic valley value (thermal decomposition rate) of the tailings is 5.13%/min at most, the corresponding temperature is 762.70 ℃, the DSC endothermic valley area of the tailings is larger, and the heat required for thermal decomposition is the largestThe value of 6.20mw/mg indicates that it requires more heat to complete the thermal decomposition and the thermodynamic activation difficulty is relatively high.
(4) In the water-cement ratio of 1: under the condition of 1 (mass concentration is 50%), 40% of tailings replaces 42.5-grade cement (the cement accounts for 60%), the total amount of the composite cementing material is 400g, 400g of pure water is added, the pure water is sequentially added into a paste mixer, the mixture is slowly stirred for 2min and then quickly stirred for 2min, a mold of 4cm multiplied by 4cm is injected, a curing box is subjected to constant-temperature and constant-humidity curing for 4h and then is demolded, the curing is continued to 28 days after marking is carried out, 28d unconfined compressive strength is measured, the compressive strength value is 3.4MPa, the compressive strength of a test block prepared by original cement without the tailings is 10.39MPa in 28 days, and the activity index is 32.72%. .
The method for analyzing the activity of the surface layer tailings of the Yunnan Dongchuan copper tailing pond discovers that the tailings belong to extra-coarse carbonate tailings, the contents of calcium and magnesium are relatively high, the mass coefficient K is 1.93, and the alkaline coefficient M is01.61, the thermal decomposition weight loss rate is 34.82%, the maximum thermal decomposition rate is 5.13%/min, the thermal decomposition heat demand is larger, the 28-day compressive strength of the cement cemented tailings is 3.4MPa, and the activity index is 32.72%.
Example 2 comprehensive analysis and evaluation of activity of tail water beach side tailings of Yunnan Dongchuan copper tailings pond
The method comprises the following steps:
(1) pretreating tail water beach side tailings of a Yunnan Dongchuan copper tailing pond, and performing X-ray fluorescence spectrum xrf and X-ray diffraction analysis xrd by using a chemical component analysis method, wherein the analysis shows that the tail water beach side tailings have the calcium content of 24.53%, the silicon content of 17.70%, the aluminum content of 3.6%, the magnesium content of 14.90%, the mass coefficient K of 2.56 and the alkalinity coefficient M of01.94, the main mineral phases in the tailings are dolomite, limestone and quartz stone, and the tailings belong to carbonate type tailings;
(2) the tailings are taken to be subjected to particle size distribution analysis by a laser particle sizer, and the median diameter D of the tailings is found5011 μm, belonging to superfine tailings, therefore, the tailings are superfine carbonate tailings;
(3) using a synchronous thermal analyser from German Steed instruments, in N2Atmosphere(s)And then, heating the tailings from room temperature to 1000 ℃ at a flow rate of 50mL/min and a heating rate of 10K/min, and performing synchronous thermal analysis (TG-DTG-DSC) on the tailings to detect that a main weight loss peak exists in the tailings at 539-800 ℃, the total weight loss rate is 35.74%, the maximum heat absorption valley value is 5.33%/min, namely the maximum thermal decomposition rate of the tailings is 5.33%/min, the maximum heat requirement for thermal decomposition is 5.73mw/mg, and the rough tailings with heat for completing the thermal decomposition are relatively less and are more easily thermally decomposed.
(4) Because the phase components of the tailings are simple, the crystal form of the minerals is complete, the content of dolomite in the tailings is 87.13 percent, the content of quartz stone is 8.2 percent, and CaZn (CO) is determined by adopting an X-ray diffraction semi-quantitative fine modification method for analysis3)2The content is 4.6 percent, which indicates that the main mineral component in the tailings is dolomite, and belongs to carbonate tailings.
(5) In the water-cement ratio of 1: under the condition of 1 (mass concentration is 50%), 40% of tailings replaces 42.5-grade cement (the cement accounts for 60%), the total amount of the composite cementing material is 400g, 400g of pure water is added, the pure water is sequentially added into a paste mixer, the mixture is slowly stirred for 2min and then quickly stirred for 2min, a mold of 4cm multiplied by 4cm is injected, a curing box is maintained for 4h at constant temperature and constant humidity, the demolding is carried out, the curing is continued for 28 days after marking is carried out, 28d unconfined compressive strength is measured, the compressive strength value is 3.97MPa, the compressive strength of a test block prepared by original cement without the tailings is 10.39MPa in 28 days, and the activity index is 38.21%.
The method analyzes the activity of the tail water beach side tailings of the Yunnan Dongchuan copper tailing pond to find that the tailings belong to superfine carbonate type tailings, the content of calcium and magnesium is relatively high, the mass coefficient K is 2.56, and the alkalinity coefficient M is0The thermal decomposition weight loss rate is 1.94, the thermal decomposition weight loss rate is 35.74%, the maximum thermal decomposition rate is 5.33%/min, the maximum thermal decomposition heat demand is 5.73mw/mg, the 28-day compressive strength of the cement-bonded tailings is 3.97MPa, the activity index is 38.21%, and the activity is better than that of the tailings in example 1.
Example 3 comprehensive analysis and evaluation of iron tailings activity of filling station of Shandong Jinan Lai New tailings pond
The method comprises the following steps:
(1) getAfter being pretreated, the iron tailings in the filling station of the Shandong Jinanlai new tailing pond are subjected to X-ray fluorescence spectrum xrf and X-ray diffraction analysis xrd by adopting a chemical composition analysis method, and the iron tailings are analyzed to find that the iron tailings have the calcium content of 14.36 percent, the silicon content of 30.04 percent, the aluminum content of 8.29 percent and the magnesium content of 15.71 percent, the mass coefficient K of the iron tailings is 1.26, and the alkalinity coefficient M00.79, and the main mineral phases in the tailings are chlorite and quartz. The tailings belong to silicate tailings;
(2) the tailings are taken to be subjected to particle size distribution analysis by a laser particle sizer, and the median diameter D of the tailings is found5042.8 μm, belonging to fine tailings, thus the tailings are fine silicate tailings;
(3) using a synchronous thermal analyser from German Steed instruments, in N2In an atmosphere, the flow rate is 50mL/min, the temperature is increased from room temperature to 1000 ℃ at the temperature rise rate of 10K/min, synchronous thermal analysis (TG-DTG-DSC) is carried out on the tailings, the fact that the tailings have an endothermic valley at 230-320 ℃, 430-600 ℃ and 600-800 ℃ is detected, however, the overall weight loss rate is not high and is only 14.52%, the maximum thermal decomposition rate is 1.05%/min, the maximum thermal decomposition heat demand is 4.02mw/mg, and the content of inert components in the surface tailings is high.
(4) In the water-cement ratio of 1: under the condition of 1 (mass concentration is 50%), 40% of tailings replaces 42.5-grade cement (the cement accounts for 60%), the total amount of the composite cementing material is 400g, 400g of pure water is added, the pure water is sequentially added into a paste mixer, the mixture is slowly stirred for 2min and then quickly stirred for 2min, a mold of 4cm multiplied by 4cm is injected, a curing box is maintained for 4h at constant temperature and humidity, the demolding is carried out, the curing is continued for 28 days after marking is carried out, 28d unconfined compressive strength is measured, the compressive strength value is 2.69MPa, the compressive strength of a test block prepared by original cement without the tailings is 10.39MPa in 28 days, and the activity index is 25.89%.
The method for analyzing the activity of the iron tailings in the filling station of the Shandong Jinanlai new tailing pond finds that the tailings belong to fine silicate tailings, the content of silicon and magnesium is relatively high, the mass coefficient K is 1.26, and the alkaline coefficient M is00.79, the thermal decomposition weight loss rate is 14.52 percent, the maximum thermal decomposition rate is 1.05 percent/min, the maximum heat quantity required for thermal decomposition is 4.02mw/mg,the heat requirement is more, the decomposition weight loss rate is lower, the tailing components are more stable, the compression strength of cement cementing the tailing for 28 days is 2.69MPa, the activity index is 25.89 percent, and the content is relatively lower.
Example 4 comprehensive analysis and evaluation of activity of iron tailings of this part of Shandong Luzhong mining industry
The method comprises the following steps:
(1) pretreating the iron tailings of the mining industry of Shandong Luzhong, and performing X-ray fluorescence spectrum xrf and X-ray diffraction analysis xrd by using a chemical composition analysis method, wherein the iron tailings are analyzed to find that the calcium content is 15.40%, the silicon content is 30.52%, the aluminum content is 10.02%, the magnesium content is 15.95%, the mass coefficient K is 1.33, and the alkalinity coefficient M is00.77, and the main mineral phases in the tailings are chlorite and quartz. The tailings belong to silicate tailings;
(2) the tailings are taken to be subjected to particle size distribution analysis by a laser particle sizer, and the median diameter D of the tailings is found5022.5 μm, belonging to fine tailings, thus the tailings are fine silicate tailings;
(3) using a synchronous thermal analyser from German Steed instruments, in N2In an atmosphere, the flow rate is 50mL/min, the temperature is increased from room temperature to 1000 ℃ at the temperature rise rate of 10K/min, synchronous thermal analysis (TG-DTG-DSC) is carried out on the tailings, the fact that the tailings have an endothermic valley at 426-590 ℃ and 590-793 ℃ is detected, however, the overall weight loss rate is low and is only 12.87%, the maximum thermal decomposition rate is 1.16%/min, the maximum thermal decomposition heat demand is 3.69mw/mg, and the tailings are not suitable for thermodynamic excitation activity.
(4) In the water-cement ratio of 1: under the condition of 1 (mass concentration is 50%), 40% of tailings replaces 42.5-grade cement (the cement accounts for 60%), the total amount of the composite cementing material is 400g, 400g of pure water is added, the pure water is sequentially added into a paste mixer, the mixture is slowly stirred for 2min and then quickly stirred for 2min, a mold of 4cm multiplied by 4cm is injected, a curing box is maintained for 4h at constant temperature and humidity, the demolding is carried out, the curing is continued for 28 days after marking is carried out, 28d unconfined compressive strength is measured, the compressive strength value is 3.64MPa, the compressive strength of a test block prepared by original cement without the tailings is 10.39MPa in 28 days, and the activity index is 35.03%.
The method analyzes the activity of the iron tailings of the mining industry of Shandong Lu, and finds that the tailings belong to fine silicate tailings, the content of silicon and magnesium is relatively high, the mass coefficient K is 1.33, and the alkalinity coefficient M is00.77, the thermal decomposition weight loss rate is 12.87 percent, the maximum thermal decomposition rate is 1.16 percent/min, the maximum heat quantity required for thermal decomposition is 3.69mw/mg, the tailing components are relatively stable, the 28-day compressive strength of the cement-bonded tailing is 3.69MPa, the activity index is 35.03 percent, the activity index is relatively higher compared with the first embodiment and the third embodiment, and the main factors are that the particle size of the tailing is relatively fine and the content of silicon is relatively higher.
The method analyzes the particle size D of the tailings50The method comprises the following steps of 1) refining the particle size of tailings, 2) increasing the content of Ca, Si, Al, Mg and other components in the tailings or increasing the mass coefficient and the alkali coefficient, 3) increasing the thermal decomposition weight loss rate, increasing the maximum thermal decomposition rate and the thermal decomposition heat demand, 4) increasing the relative content of mineral phases containing elements such as silicon and calcium, and the like, wherein theoretically the activity (pozzolanic activity) of the tailings is relatively good. And finally, verifying the actual activity of the tailings by using a 28-day compressive strength value of the cement cemented tailings, wherein the higher the compressive strength value is, the best activity of the tailings can be determined. The method can better analyze and evaluate the activity of the tailings by accurate qualitative and quantitative analysis, transverse comparison among different tailings and actual industrial test analysis.
Claims (7)
1. A comprehensive analysis and evaluation method for mine tailing activity is characterized by comprising the following steps: the method comprises a chemical component analysis method, a particle size distribution analysis method, a thermal analysis method, a phase quantitative analysis method and a cement bond tailing strength test method.
2. The method for comprehensively analyzing and evaluating the activity of the mine tailings according to claim 1, wherein the method comprises the following steps: the chemical component analysis method adopts an X-ray diffraction method and an X-fluorescence spectrometry analysis and characterization technology to analyze the contents of main active elements such as Ca, Si, Al and Mg in tailings and the types of main mineral phases in the tailings, so as to determine the specific types of the tailings, wherein the specific classification comprises the following steps: silicate type tailings, carbonate type tailings, phosphate type tailings, and sulfate type tailings.
3. The method for comprehensively analyzing and evaluating the activity of the mine tailings according to claim 1, wherein the method comprises the following steps: the particle size distribution analysis method mainly adopts a laser particle sizer to analyze the particle size distribution condition of the original tailings and D50According to the size of the tailings D50The median diameter value can divide the tailings into the following types: 1) d50>80 μm, belonging to extra coarse tailings; 2)45 μm<D50Less than or equal to 80 mu m, belongs to coarse tailings; 3)20 μm<D50Less than or equal to 45 mu m, belongs to fine tailings; 4)10 μm<D50 is less than or equal to 20 mu m, belonging to the superfine tailings.
4. The method for comprehensively analyzing and evaluating the activity of the mine tailings according to claim 1, wherein the method comprises the following steps: the thermal analysis method mainly adopts a synchronous thermal analyzer in N2Heating the tailings to 1000 ℃ from room temperature at a heating rate of 10K/min under the atmosphere at a flow rate of 50mL/min, and carrying out synchronous thermal analysis on the tailings; by analyzing TG, DTG and DSC curves of the tailings, the high-temperature calcination weight loss rate, the thermal decomposition rate and the heat demand of the tailings can be further researched, so that the volcanic ash activity of the tailings can be analyzed and compared.
5. The method for comprehensively analyzing and evaluating the activity of the mine tailings according to claim 1, wherein the method comprises the following steps: the phase quantitative analysis method is used for analyzing the relative content of specific mineral components in tailings when the mineral components of the tailings are simple and have regular crystal forms and less amorphous-state impurities, and for the tailings with single mineral components, the X-ray diffraction semi-quantitative fine modification method is used for analyzing to determine the mineral phases and the relative content in the tailings.
6. The method for comprehensively analyzing and evaluating the activity of the mine tailings according to claim 1, wherein the method comprises the following steps: the cement bond tailing strength test method mainly aims at evaluating and verifying the accuracy of tailing activity analysis by a chemical component analysis method, a particle size distribution analysis method, a thermal analysis method and a phase quantitative analysis method, cement bond tailing compressive strength tests are carried out on tailings of different types and common cement in the market according to a certain mixing proportion, and the compressive strength of a solidified body in a certain age can be analyzed to judge which tailing has better hydration activity and verify the accuracy of the four analysis methods.
7. The method for comprehensively analyzing and evaluating the activity of the mine tailings of any one of claims 1 to 6, comprising the following steps of:
s1) determining the main mineral components, the active element content and the particle size of the tailings by adopting a chemical component analysis method and a particle size distribution analysis method, and determining the types of the tailings;
s2) analyzing the thermal effect of main mineral powder components in the tailings by adopting a thermal analysis method, wherein if the thermal effect of the tailings is good, the mineral components of the tailings are more easily decomposed by heating in the heat release process of a cement hydration system, the decomposed products can further participate in the hydration reaction, and meanwhile, the activity of the tailings can be further improved by using a thermodynamic high-temperature calcination method, so that the material utilization is realized;
s3) further analyzing the relative content of main active mineral phases in the tailings by adopting a phase quantitative analysis method, wherein the higher the relative content is, the better the activity is theoretically;
s4) carrying out theoretical analysis through four methods of S1-S3, basically comparing and analyzing a group of tailings with the best volcanic ash activity, and finally analyzing and verifying the actual volcanic ash activity of the tailings by adopting a cement bond tailings strength test method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111520407.3A CN114236096A (en) | 2021-12-13 | 2021-12-13 | Comprehensive analysis and evaluation method for activity of mine tailings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111520407.3A CN114236096A (en) | 2021-12-13 | 2021-12-13 | Comprehensive analysis and evaluation method for activity of mine tailings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114236096A true CN114236096A (en) | 2022-03-25 |
Family
ID=80755335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111520407.3A Pending CN114236096A (en) | 2021-12-13 | 2021-12-13 | Comprehensive analysis and evaluation method for activity of mine tailings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114236096A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101698582A (en) * | 2009-10-26 | 2010-04-28 | 中国十七冶建设有限公司 | Iron tailing premixed concrete and preparation method thereof |
| CN104310920A (en) * | 2014-10-11 | 2015-01-28 | 东北大学 | Method of preparing concrete building material by utilizing high-silicon type iron tailings |
| CN111606585A (en) * | 2020-07-02 | 2020-09-01 | 武汉大学 | Superfine carbonate type tailing-based active material, preparation method thereof and application of superfine carbonate type tailing-based active material as cement material |
-
2021
- 2021-12-13 CN CN202111520407.3A patent/CN114236096A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101698582A (en) * | 2009-10-26 | 2010-04-28 | 中国十七冶建设有限公司 | Iron tailing premixed concrete and preparation method thereof |
| CN104310920A (en) * | 2014-10-11 | 2015-01-28 | 东北大学 | Method of preparing concrete building material by utilizing high-silicon type iron tailings |
| CN111606585A (en) * | 2020-07-02 | 2020-09-01 | 武汉大学 | Superfine carbonate type tailing-based active material, preparation method thereof and application of superfine carbonate type tailing-based active material as cement material |
Non-Patent Citations (5)
| Title |
|---|
| 付凌雁等: "铝土矿尾矿活化制备水泥基材料的研究", 《化学工程》, vol. 35, no. 06, pages 1 * |
| 朱刚雄等: "钨尾矿在水泥胶砂中的应用", 《矿产保护与利用》, no. 05, pages 1 * |
| 赖航等: "石灰石矿山剥离尾矿活化作新型辅助胶凝材料研究", 《中国矿业》, vol. 29, no. 02, pages 2 * |
| 赵晖主编: "《尾矿工程》", pages: 1008 - 1009 * |
| 金恒等: "磷尾矿制备胶结充填材料试验研究", 《化工矿物与加工》, no. 12, pages 1 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liu et al. | Experimental research on magnesium phosphate cements modified by red mud | |
| Luo et al. | Utilization of iron ore tailings as raw material for Portland cement clinker production | |
| Malatse et al. | The viability of using the Witwatersrand gold mine tailings for brickmaking | |
| Peng et al. | Tungsten tailing powders activated for use as cementitious material | |
| CN111233422A (en) | Concrete containing coal-to-liquid coarse slag and preparation method thereof | |
| Wang et al. | Preparation of Portland cement with gold ore tailings | |
| CN112851277A (en) | Magnesium-cinder-based novel paving and mining filling material and preparation method thereof | |
| Duarte et al. | Influence of mechanical treatment and magnetic separation on the performance of iron ore tailings as supplementary cementitious material | |
| WO2013059799A1 (en) | Method and compositions for pozzolanic binders derived from non-ferrous smelter slags | |
| Norrarat et al. | Evaluation of strengths from cement hydration and slag reaction of mortars containing high volume of ground river sand and GGBF slag | |
| CN111508566B (en) | Preparation method for preparing low-cost filling cementing material by composite excitation of multiple solid wastes | |
| Wu et al. | Experimental study on the concrete with compound admixture of iron tailings and slag powder under low cement clinker system | |
| Khudhair et al. | Development of a new hydraulic binder (composite cement) based on a mixture of natural Pozzolan active ‘PN’and Pure Limestone ‘P, Lime’: Study of the physical-chemical and mechanical properties | |
| Nighot et al. | A comprehensive study on the synthesis and characterization of eco-cementitious binders using different kind of industrial wastes for sustainable development | |
| Xie et al. | Synthesis and influencing factors of high-performance concrete based on copper tailings for efficient solidification of heavy metals | |
| CN110451824A (en) | A kind of method that ore floatation tailings prepares Portland clinker | |
| Sun et al. | Preparation and characterization of a new alkali-activated binder for superfine-tailings mine backfill | |
| Almada et al. | Effect of the waste ornamental rocks on the hydration and life cycle of Portland cement composites | |
| Wang et al. | Preparation of geopolymer concrete with Bayer red mud and its reaction mechanism | |
| Lu et al. | Preparation of new copper smelting slag-based mine backfill material and investigation of its mechanical properties | |
| CN107382107B (en) | Method for preparing sulphoaluminate cement clinker by using magnesium slag and manganese slag | |
| Thiéry et al. | Characterization of raw and burnt oil shale from Dotternhausen: Petrographical and mineralogical evolution with temperature | |
| CN114236096A (en) | Comprehensive analysis and evaluation method for activity of mine tailings | |
| Su et al. | Research on reactivity evaluation and micro-mechanism of various solid waste powders for alkali-activated cementitious materials | |
| Ding et al. | Recycled household ceramic waste in eco-efficient cement: A case study |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |