CN114890724A - Lead-zinc smelting slag-based cementing material and preparation method and application thereof - Google Patents
Lead-zinc smelting slag-based cementing material and preparation method and application thereof Download PDFInfo
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- CN114890724A CN114890724A CN202210538140.9A CN202210538140A CN114890724A CN 114890724 A CN114890724 A CN 114890724A CN 202210538140 A CN202210538140 A CN 202210538140A CN 114890724 A CN114890724 A CN 114890724A
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- lead
- smelting slag
- zinc smelting
- zinc
- slag
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- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 239000002893 slag Substances 0.000 title claims abstract description 110
- 238000003723 Smelting Methods 0.000 title claims abstract description 99
- 239000000463 material Substances 0.000 title claims abstract description 74
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 32
- 239000004568 cement Substances 0.000 claims abstract description 29
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 19
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 14
- 239000010446 mirabilite Substances 0.000 claims abstract description 14
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 11
- 239000001110 calcium chloride Substances 0.000 claims abstract description 7
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 8
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 7
- 238000011049 filling Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- 239000012190 activator Substances 0.000 abstract description 3
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 10
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000013022 formulation composition Substances 0.000 description 5
- 239000002910 solid waste Substances 0.000 description 5
- 239000011787 zinc oxide Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- RSIJVJUOQBWMIM-UHFFFAOYSA-L sodium sulfate decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[O-]S([O-])(=O)=O RSIJVJUOQBWMIM-UHFFFAOYSA-L 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 238000000498 ball milling Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000005368 silicate glass Substances 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 229910001676 gahnite Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052596 spinel Inorganic materials 0.000 description 2
- 239000011029 spinel Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241001270131 Agaricus moelleri Species 0.000 description 1
- 239000004110 Zinc silicate Substances 0.000 description 1
- 229910001514 alkali metal chloride Inorganic materials 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 210000004127 vitreous body Anatomy 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a lead-zinc smelting slag-based cementing material and a preparation method and application thereof. The lead-zinc smelting slag-based cementing material comprises the following components in parts by mass: 45-75 parts of lead-zinc smelting slag, 8-30 parts of cement clinker, 0-7 parts of calcium chloride and 11-45 parts of excitant; the excitant comprises silica fume, mirabilite and bauxite. The activator compounded by the silica fume, the mirabilite and the bauxite is adopted in the cementing material, and the silica fume, the mirabilite and the bauxite have a synergistic effect.
Description
Technical Field
The invention relates to the technical field of solid waste recycling, in particular to a lead-zinc smelting slag-based cementing material and a preparation method and application thereof.
Background
According to statistics, 7100t of waste slag is discharged when each ten thousand tons of lead are produced by the lead smelting system, 9600t of waste slag is discharged when each ten thousand tons of zinc are produced by the lead smelting system, and a large amount of lead-zinc smelting waste slag is produced by lead-zinc smelting enterprises every year. The development of the resource utilization of lead-zinc smelting slag is one of the most urgent problems facing lead-zinc smelting enterprises at present. The method has the advantages that the method promotes 'solid wastes do not leave factory' in the ferrous metallurgy industry, enhances full-scale utilization, promotes multi-industry and multi-variety synergistic utilization of the solid wastes in the ferrous industry according to local conditions, forms a reproducible and generalizable utilization mode, and becomes a necessary trend of green development of the ferrous industry.
The lead-zinc smelting slag is a solid waste and is also a valuable resource. According to the research and analysis on the lead-zinc smelting slag process mineralogy, the method can be known as follows: the lead-zinc smelting slag mainly contains iron oxide, lead-zinc oxide and silicate; the iron mainly comprises strong magnetic metal Fe, magnetic iron and weak magnetic limonite, wherein the iron content of the weak magnetic limonite accounts for more than 60% of the total iron, so that the lead-zinc smelting slag has metal extraction and utilization values. In addition, the lead-zinc smelting slag contains a large amount of glass bodies in chemical composition and crystal structure through high-temperature smelting and rapid cooling processes, and has potential gelling activity, but the gelling activity in the lead-zinc smelting slag cannot be effectively excited in the prior art, so that the utilization of the lead-zinc smelting slag is limited.
Disclosure of Invention
In order to overcome the problem that the prior art cannot effectively stimulate the gelling activity in the lead-zinc smelting slag, the invention aims to provide a lead-zinc smelting slag-based gelling material, aims to provide a preparation method of the lead-zinc smelting slag-based gelling material, and aims to provide application of the lead-zinc smelting slag-based gelling material.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention provides a lead-zinc smelting slag-based cementing material, which comprises the following components in parts by mass: 45-75 parts of lead-zinc smelting slag, 8-30 parts of cement clinker, 0-7 parts of calcium chloride and 11-45 parts of excitant;
the excitant comprises silica fume, mirabilite and bauxite.
Preferably, the activator comprises 7-25 parts of silica fume, 3-15 parts of mirabilite and 1-5 parts of bauxite.
Preferably, the lead-zinc smelting slag-based cementing material comprises the following components in parts by mass: 48-72 parts of lead-zinc smelting slag, 10-28 parts of cement clinker, 1-7 parts of calcium chloride, 7-22 parts of silica fume, 3-12 parts of mirabilite and 1-5 parts of bauxite.
Further preferably, the lead-zinc smelting slag-based cementing material comprises the following components in parts by mass: 50-70 parts of lead-zinc smelting slag, 10-25 parts of cement clinker, 1-5 parts of calcium chloride, 7-20 parts of silica fume, 3-10 parts of mirabilite and 1-5 parts of bauxite.
Preferably, the lead-zinc smelting slag-based cementing material comprises the following components in percentage by mass: 15-26% SiO 2 、35-50％Fe 2 O 3 、5-12％Al 2 O 3 、12-21％CaO、0.5-4.5％MgO、0.4-7％PbO 2 、0.5-7％ZnO、0.1-2.5％SO 3 (ii) a Further preferably, the lead-zinc smelting slag comprises the following components in percentage by mass: 16-25% SiO 2 、38-48％Fe 2 O 3 、6-11％Al 2 O 3 、13-20％CaO、0.7-4.0％MgO、0.5-6.5％PbO 2 、1.0-6.5％ZnO、0.2-2.0％SO 3 (ii) a Still further preferably, the lead-zinc smelting slag comprises the following components in percentage by mass: 17-24% SiO 2 、39-47％Fe 2 O 3 、7-10％Al 2 O 3 、14-19％CaO、0.9-3.0％MgO、0.5-6.0％PbO 2 、1.0-6.0％ZnO、0.25-1.3％SO 3 (ii) a Still more preferably, the lead-zinc smelting slag comprises the following components in percentage by mass: 18-23% SiO 2 、40-46％Fe 2 O 3 、7-9％Al 2 O 3 、15-18％CaO、1.0-2.6％MgO、0.5-5.5％PbO 2 、1.0-5.5％ZnO、0.25-1.3％SO 3 。
Preferably, the lead-zinc smelting slag-based cementing material has the grain size of less than 75 mu m and the proportion of more than 95 percent.
Preferably, the silicate vitreous body content of the lead-zinc smelting slag-based cementing material is 86-90 wt%; further preferably, the silicate glass content of the lead-zinc smelting slag is 87-89 wt%; still further preferably, the silicate glass content of the lead-zinc smelting slag is 87.5-88.5 wt%; still more preferably, the lead-zinc slag has a silicate glass content of 88.1 wt%.
Preferably, the lead-zinc smelting slag-based cementing material has the zinc spinel content of 2-3 wt% of the lead-zinc smelting slag; further preferably, the content of gahnite in the lead-zinc smelting slag is 2.5-2.8 wt%; still further preferably, the content of gahnite in the lead-zinc smelting slag is 2.5-2.7 wt%; still more preferably, the lead-zinc slag has a zinc spinel content of 2.61 wt%.
Preferably, the limonite content of the lead-zinc smelting slag is 0.4-0.6 wt% in the lead-zinc smelting slag-based cementing material; further preferably, the limonite content of the lead-zinc smelting slag is 0.45-0.5 wt%; still further preferably, the limonite content of the lead-zinc smelting slag is 0.48 wt%.
Preferably, the mass percentage of the lead-zinc smelting slag-based cementing material to the cement clinker with the grain diameter less than 2.67 μm is 8-12 wt%; further preferably, the mass percentage of the cement clinker grain diameter less than 2.67 μm is 9-11 wt%; still more preferably, the mass percentage of the cement clinker particle size < 2.67 μm is 10 wt%.
Preferably, the mass percentage of the lead-zinc smelting slag-based cementing material to the cement clinker with the grain diameter less than 5.29 μm is 25-35 wt%; further preferably, the mass percentage of the cement clinker grain diameter less than 5.29 μm is 28-32 wt%; still more preferably, the mass percentage of the cement clinker particle size less than 5.29 μm is 30 wt%.
Preferably, the mass percentage of the lead-zinc smelting slag-based cementing material to the cement clinker with the grain diameter less than 7.57 mu m is 40-60 wt%; further preferably, the mass percentage of the cement clinker grain diameter less than 7.57 μm is 45-55 wt%; still more preferably, the mass percentage of the cement clinker particle size < 7.57 μm is 50 wt%.
Preferably, the mass percentage of the lead-zinc smelting slag-based cementing material with the cement clinker particle size less than 11.18 mu m is 50-70 wt%; further preferably, the mass percentage of the cement clinker with the grain diameter less than 11.18 μm is 55-65 wt%; still more preferably, the mass percentage of the cement clinker particle size < 11.18 μm is 60 wt%.
Preferably, the mass percentage of the lead-zinc smelting slag-based cementing material with the cement clinker grain size less than 31.09 mu m is more than or equal to 85 wt%; further preferably, the mass percentage of the cement clinker with the grain diameter less than 31.09 mu m is more than or equal to 88 wt%; still more preferably, the mass percentage of the cement clinker particle size less than 31.09 μm is 90 wt%.
Preferably, the lead-zinc smelting slag-based cementing material comprises the following components in percentage by mass: 75-95% SiO 2 、0.8-2.5％Al 2 O 3 、0.6-3.0％Fe 2 O 3 、0.5-3.0％MgO、0.3-5.0％CaO、1-3％Na 2 O。
Preferably, the lead-zinc smelting slag-based cementing material has the silica fume volume weight of 1600-1700kg/m 3 。
Preferably, the ratio of the particle size of the siliceous dust of the lead-zinc smelting slag-based cementing material is less than 1 mu m and is more than or equal to 80 percent.
Preferably, the specific surface area of the siliceous dust of the lead-zinc smelting slag-based cementing material is 18-30m 2 (ii)/g; more preferably, the silica fume has a specific surface area of 19 to 29m 2 (ii)/g; still more preferably, the silica fume has a specific surface area of 20 to 28m 2 /g。
Preferably, the lead-zinc smelting slag-based gelled material has the appearance of gray or off-white powder and the refractoriness of more than 1600 ℃.
Preferably, in the lead-zinc smelting slag-based cementing material, the mirabilite is industrial mirabilite, and the particle size distribution of the mirabilite is as follows: 10 wt% of particles with a particle size of < 2.75 μm; 30 wt% of particles with a particle size of less than 5.54 μm; 50 wt% of particles with a particle size of less than 8.61 μm; 60 wt% of particles with a particle size of < 13.46 μm; 90% by weight of particles having a particle size of < 35.94 μm.
Preferably, the calcium chloride of the lead-zinc smelting slag-based cementing material is industrial I-type anhydrous sodium chloride, the content of the calcium chloride is more than or equal to 94 percent, and the alkalinity is (by Ca (OH)) 2 Calculated by NaCl is less than or equal to 0.25 percent, the total alkali metal chloride (calculated by NaCl) is less than or equal to 5.0 percent, the PH value is 7.5 to 11.0, and the granularity is 120 mu m.
Preferably, the lead-zinc smelting slag-based cementing material is Al in bauxite 2 O 3 The content is more than 80 percent; more preferably, Al in the bauxite 2 O 3 The content is more than 82 percent; still more preferably, Al in the bauxite 2 O 3 The content is more than 84 percent; more preferably, Al in the bauxite 2 O 3 The content is more than 85 percent.
Preferably, the lead-zinc smelting slag-based cementing material is Fe in bauxite 2 O 3 The content is less than 2.0 percent.
Preferably, the lead-zinc smelting slag-based cementing material is TiO in bauxite 2 The content is less than 4.0 percent.
Preferably, the density of the bauxite of the lead-zinc smelting slag-based cementing material is 2.8 to 3.8g/cm 3 (ii) a More preferably, the bauxite has a density of 2.9 to 3.7g/cm 3 (ii) a Still more preferably, the bauxite has a density of 3.0 to 3.6g/cm 3 (ii) a More preferably, the bauxite has a density of 3.1 to 3.5g/cm 3 。
Preferably, the particle size of the bauxite is 50-100 mu m; more preferably, the particle size of the bauxite is 60 to 90 μm; still more preferably, the bauxite has a particle size of 65 to 85 μm; more preferably, the bauxite has a particle size of 70 to 80 μm.
Preferably, the 3d compressive strength of the lead-zinc smelting slag-based cementing material is more than or equal to 2 MPa; more preferably, the 3d compressive strength is 2 to 4 MPa.
Preferably, the 28d compressive strength of the lead-zinc smelting slag-based cementing material is more than or equal to 20 MPa; more preferably, the 28d compressive strength is 20 to 28 MPa.
The second aspect of the invention provides a preparation method of the lead-zinc smelting slag-based cementing material, which comprises the following steps:
and mixing the components to obtain the lead-zinc smelting slag-based cementing material.
Preferably, in the preparation method of the lead-zinc smelting slag-based cementing material, all components are mixed and stirred; further preferably, the stirring speed is 34-40rpm, and the stirring time is 20-40 min; still more preferably, the rotation speed of stirring is 37rpm, and the stirring time is 30 min.
The third aspect of the invention provides application of the lead-zinc smelting slag-based cementing material in goaf or roadbed filling.
The invention has the beneficial effects that:
the inventionThe cementing material component contains bauxite which is used as an excitant and is used for exciting the activity of lead-zinc smelting slag, and meanwhile, a proper amount of Al is added into the cementing material formula, so that Al is formed after reaction 2 SiO 5 And the strength of the cementing material is further improved.
The activator compounded by the silica fume, the mirabilite and the bauxite is adopted in the cementing material, and the silica fume, the mirabilite and the bauxite have a synergistic effect.
The cementing material can be used for goaf filling, freeway cavities, freeway roadbeds and the like, can realize large-scale consumption and utilization of solid wastes in the steel industry, eliminates the ecological environment hidden danger caused by steel slag and the like, can solve the problems of high pollution, high energy consumption and the like caused by the large use of the traditional cement, and has great social and economic benefits for promoting the regional economic high-quality development and the enterprise green development.
Detailed Description
The present invention will be described in further detail with reference to specific examples. The starting materials, reagents or apparatus used in the examples and comparative examples were obtained from conventional commercial sources or can be obtained by a method of the prior art, unless otherwise specified. Unless otherwise indicated, the testing or testing methods are conventional in the art.
Example 1
The components of the lead-zinc smelting slag-based cementing material of the embodiment are shown in the following table 1.
TABLE 1 composition of lead-zinc smelting slag-based cementitious material of this example
Example 1 a method for preparing a lead-zinc smelting slag-based cementitious material, comprising the steps of:
1) according to the formula dosage of the table 1, a proper amount of lead-zinc smelting slag particles are weighed and added into a ball milling tank of a high-speed planetary ball mill, then ball milling and stirring are carried out in the planetary ball mill at the rotating speed of 300r/min for 120min, and then ball milling is carried out at the same speed for 120min in the reverse direction, so that lead-zinc smelting slag powder with the particle size of 200 meshes below 95% is obtained.
2) And sequentially adding the prepared lead-zinc smelting slag powder and other components into a flat-top mixer according to the formula dosage, and stirring at the speed of 37r/min for 30min to uniformly mix the components to obtain the lead-zinc smelting slag-based cementing material.
Example 2
The components of the lead-zinc smelting slag-based cementing material of the embodiment are shown in the following table 2.
TABLE 2 composition of lead-zinc smelting slag-based gelled material of this example
| Raw materials | Mass portion of |
| Lead-zinc smelting slag | 52 |
| Cement clinker | 12 |
| Silica fume | 20 |
| Natrii sulfas | 10 |
| Anhydrous calcium chloride | 4 |
| Bauxite | 2 |
The lead-zinc slag-based gelled material of this example was prepared according to the formulation composition of table 2, with reference to the preparation method of example 1.
Example 3
The components of the lead-zinc smelting slag-based cementing material of the present example are shown in the mass portion in table 3.
TABLE 3 composition of lead-zinc smelting slag-based cementitious material of this example
| Raw materials | Mass portion of |
| Lead-zinc smelting slag | 55 |
| Cement clinker | 21 |
| Silica fume | 18 |
| Natrii sulfas | 4 |
| Anhydrous calcium chloride | 1 |
| Bauxite | 1 |
The lead-zinc slag-based gelled material of this example was prepared according to the formulation composition of table 3, with reference to the preparation method of example 1.
Example 4
The components of the lead-zinc smelting slag-based cementing material of the present example are shown in the mass portion in table 4.
TABLE 4 composition of lead-zinc smelting slag-based cementitious material of this example
The lead-zinc slag-based gelled material of this example was prepared according to the formulation composition of table 4, with reference to the preparation method of example 1.
Example 5
The components of the lead-zinc smelting slag-based cementing material of this example are shown in Table 5 in parts by mass.
TABLE 5 composition of lead-zinc smelting slag-based gelled material of this example
| Raw materials | Mass portion of |
| Lead-zinc smelting slag | 65 |
| Cement clinker | 18 |
| Silica fume | 8 |
| Natrii sulfas | 6 |
| Anhydrous calcium chloride | 2 |
| Bauxite | 1 |
The lead-zinc slag-based gelled material of this example was prepared according to the formulation composition of table 5, with reference to the preparation method of example 1.
Example 6
The components of the lead-zinc smelting slag-based cementing material of this example are shown in Table 6 in parts by mass.
TABLE 6 composition of lead-zinc smelting slag-based gelled material of this example
| Raw materials | Mass portion of |
| Lead-zinc smelting slag | 68 |
| Cement clinker | 13 |
| Silica fume | 10 |
| Natrii sulfas | 5 |
| Anhydrous calcium chloride | 3 |
| Bauxite | 1 |
The lead-zinc slag-based gelled material of this example was prepared according to the formulation composition of table 6, with reference to the preparation method of example 1.
Comparative example 1
Comparative example 1 is a commercially available ordinary type 32.5 cement.
Comparative example 2
Comparative example 2 is a commercial early strength 32.5R cement.
Performance testing
The lead-zinc smelting slag bases obtained in examples 1-6 and the cement in comparative examples 1-2 were subjected to the 3d and 28d compression tests in the test examples and comparative examples in accordance with GB/T17671-1999 Cement mortar Strength test method (ISO method), the specific test results are shown in Table 7:
TABLE 7 results of performance test of examples and comparative examples
| 3d compressive Strength (MPa) | 28d compressive strength (MPa) | |
| Example 1 | 3.5 | 26.6 |
| Example 2 | 2.6 | 22.5 |
| Example 3 | 3.1 | 25.7 |
| Example 4 | 2.8 | 23.5 |
| Example 5 | 3.0 | 23.1 |
| Example 6 | 2.2 | 21.4 |
| Comparative example 1 | 11.1 | 32.9 |
| Comparative example 2 | 18.3 | 32.6 |
According to the test results, the 28d compressive strength is greater than 20MPa and is about 30% lower than that of 32.5 type cement from the 28d compressive strength result, but for special application scenes with low requirements on strength, such as goaf filling, highway cavities, high roadbed and the like, the 3d compressive strength of a filling body is only required to be more than or equal to 2MPa, and the 28d compressive strength is only required to be more than or equal to 5 MPa.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The lead-zinc smelting slag-based cementing material is characterized by comprising the following components in parts by mass: 45-75 parts of lead-zinc smelting slag, 8-30 parts of cement clinker, 0-7 parts of calcium chloride and 11-45 parts of excitant;
the excitant comprises silica fume, mirabilite and bauxite.
2. The lead-zinc smelting slag-based cementing material of claim 1, wherein said excitant comprises 7-25 parts of silica fume, 3-15 parts of mirabilite and 1-5 parts of bauxite.
3. The lead-zinc slag-based cementitious material according to claim 1 or 2, characterised in that the lead-zinc slag comprises the following components in mass percent: 15-26% SiO 2 、35-50％Fe 2 O 3 、5-12％Al 2 O 3 、12-21％CaO、0.5-4.5％MgO、0.4-7％PbO 2 、0.5-7％ZnO、0.1-2.5％SO 3 。
4. The lead-zinc smelting slag-based cementitious material according to claim 3, characterised in that the lead-zinc smelting slag has a grain size < 75 μm in a proportion of more than 95%.
5. Lead-zinc smelting slag-based cementitious material according to claim 1 or 2The silicon ash is characterized by comprising the following components in percentage by mass: 75-95% SiO 2 、0.8-2.5％Al 2 O 3 、0.6-3.0％Fe 2 O 3 、0.5-3.0％MgO、0.3-5.0％CaO、1-3％Na 2 O。
6. The lead-zinc slag-based cementitious material according to claim 5, characterised in that the silica fume has a specific surface area of 18-30m 2 /g。
7. The lead-zinc slag-based cementitious material according to claim 1 or 2, characterised in that the bauxite contains Al 2 O 3 The content is more than 80 percent.
8. The lead-zinc slag-based cementitious material according to claim 7, characterised in that the density of bauxite is between 2.8 and 3.8g/cm 3 。
9. A method for preparing a lead-zinc slag-based cementitious material according to any one of claims 1 to 8, characterised in that it comprises the following steps:
and mixing the components to obtain the lead-zinc smelting slag-based cementing material.
10. Use of the lead-zinc smelting slag-based cementitious material according to any one of claims 1 to 8 in goaf or roadbed filling.
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