CN116606161A - Method for preparing porous ceramic from titanium-containing blast furnace slag and silicon slag - Google Patents
Method for preparing porous ceramic from titanium-containing blast furnace slag and silicon slag Download PDFInfo
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- CN116606161A CN116606161A CN202310598791.1A CN202310598791A CN116606161A CN 116606161 A CN116606161 A CN 116606161A CN 202310598791 A CN202310598791 A CN 202310598791A CN 116606161 A CN116606161 A CN 116606161A
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- 239000002893 slag Substances 0.000 title claims abstract description 84
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 48
- 239000010936 titanium Substances 0.000 title claims abstract description 48
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000000919 ceramic Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 34
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 23
- 239000010703 silicon Substances 0.000 title claims abstract description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000005245 sintering Methods 0.000 claims abstract description 16
- 235000019738 Limestone Nutrition 0.000 claims abstract description 15
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 15
- 239000006004 Quartz sand Substances 0.000 claims abstract description 15
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000004327 boric acid Substances 0.000 claims abstract description 15
- 239000006028 limestone Substances 0.000 claims abstract description 15
- 239000010452 phosphate Substances 0.000 claims abstract description 15
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 11
- -1 shale Substances 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 10
- 239000011148 porous material Substances 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 238000000605 extraction Methods 0.000 description 5
- 239000011494 foam glass Substances 0.000 description 5
- 239000002002 slurry Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- MOMKYJPSVWEWPM-UHFFFAOYSA-N 4-(chloromethyl)-2-(4-methylphenyl)-1,3-thiazole Chemical compound C1=CC(C)=CC=C1C1=NC(CCl)=CS1 MOMKYJPSVWEWPM-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000010427 ball clay Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 235000019983 sodium metaphosphate Nutrition 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/138—Waste materials; Refuse; Residues from metallurgical processes, e.g. slag, furnace dust, galvanic waste
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
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- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3409—Boron oxide, borates, boric acids, or oxide forming salts thereof, e.g. borax
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/447—Phosphates or phosphites, e.g. orthophosphate, hypophosphite
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- C04B2235/54—Particle size related information
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- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The invention provides a method for preparing porous ceramics from titanium-containing blast furnace slag and silicon slag, belonging to the technical fields of recycling of metallurgical slag resources, preparation of porous materials and preparation of light materials. The invention relates to a method for preparing porous ceramics from titanium-containing blast furnace slag and silicon slag, which comprises the following steps: uniformly mixing titanium-containing blast furnace slag, silicon slag, shale, quartz sand, limestone, boric acid and phosphate according to the mass ratio of 100:10-25:70:30:2-10:10-30:10-20, and sintering at 1000-1200 ℃ for 0.5-2 h with the balance of unavoidable impurities; after sintering, cooling the sintered product to room temperature to obtain the product with apparent density of 0.4-0.52 g/cm ‑3 The compressive strength is 7.5-8.2 MPa, and the flexural strength is 3.5-4.0 MPa. The method for preparing the porous ceramic from the titanium-containing blast furnace slag and the silicon slag has the advantages of obviously reducing energy consumption and simplifying the process flowAnd has good social and economic benefits.
Description
Technical Field
The invention relates to a method for preparing porous ceramics from titanium-containing blast furnace slag and silicon slag, belonging to the technical fields of recycling metallurgical slag resources, preparing porous materials and preparing light materials.
Background
The use of titanium-containing blast furnace slag is classified into 2 directions of titanium extraction use and non-titanium extraction use. Titanium extraction utilization is in a research stage and cannot realize industrial utilization. Non-titanium extraction utilization realizes industrial utilization, but fails to realize deep utilization with high added value. At present, the main mode of utilizing the titanium-containing blast furnace slag is used as coarse and fine aggregate of buildings, paving materials and the like, and the utilization value of the titanium-containing blast furnace slag is not high. The research on non-titanium extraction mainly includes microcrystalline glass, photocatalytic materials, fertilizer use and the like, but the research has not been popularized and applied.
The patent application of CN110256047A discloses a method for preparing foamed ceramics by utilizing titanium-containing blast furnace slag and shale waste residues, which comprises the following specific steps: s1, preparing titanium-containing blast furnace slag, shale waste residue and silicon dioxide powder as raw materials; s2, preparing borax, ball clay, a foaming agent, magnesium oxide, manganese oxide and sodium metaphosphate as additives; s3, mixing all the raw materials and additives, and wet-grinding to prepare slurry; s4, placing the slurry into a baking oven for drying, and then crushing in a crusher to prepare powder, wherein the particle size of the powder is 200-300 meshes; s5, filling the powder particles into a die, and then carrying out roasting foaming and crystallization processes by using a medium-temperature box type resistance furnace; and then cooling to obtain the foamed ceramic. The method has the following defects: the method has the advantages of multiple raw materials, complex types, multiple process links and long process flow.
The patent application of CN101323503A discloses a method for preparing microcrystalline foam glass from titanium-containing blast furnace slag, which comprises the following specific steps: preparing a glassy material, sintering the glassy material, preparing a foam glass material, preparing foam glass, crystallizing the foam glass, and obtaining the foam glass with full microcrystallization. The method has the following defects: the method has long and complex process flow, and the middle part needs to be subjected to multiple heating, cooling, heat preservation, annealing and other hot processing processes, so that the energy consumption is high.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide a method for preparing porous ceramics from titanium-containing blast furnace slag and silicon slag.
The method for preparing the porous ceramic from the titanium-containing blast furnace slag and the silicon slag comprises the following steps:
a. uniformly mixing titanium-containing blast furnace slag, silicon slag, shale, quartz sand, limestone, boric acid and phosphate according to the mass ratio of 100:10-25:70:30:2-10:10-30:10-20, and sintering at 1000-1200 ℃ for 0.5-2 h with the balance of unavoidable impurities;
b. and after the sintering is finished, cooling the sintered product to room temperature to obtain the porous ceramic.
Preferably, in the step a, the titanium-containing blast furnace slag, the silicon slag, the shale, the quartz sand, the limestone, the boric acid and the phosphate are uniformly mixed according to the mass ratio of 100:15-25:70:30:2-4:10-15:20.
Wherein the granularity of the titanium-containing blast furnace slag, the silicon slag, the shale, the quartz sand, the limestone, the boric acid and the phosphate in the step a is less than or equal to 0.5mm.
Wherein the mixing uniformity of the titanium-containing blast furnace slag, the silicon slag, the shale, the quartz sand, the limestone, the boric acid and the phosphate in the step a is more than or equal to 98.5 percent.
Preferably, the sintering time in step a is 0.5 to 1h.
The second technical problem to be solved by the invention is to provide the porous ceramic prepared by the method for preparing the porous ceramic from the titanium-containing blast furnace slag and the silicon slag.
Wherein the apparent density of the porous ceramic is 0.4-0.52 g/cm -3 The compressive strength is 7.5-8.2 MPa, and the flexural strength is 3.5-4.0 MPa.
The invention has the beneficial effects that:
1. the method for preparing the porous ceramic from the titanium-containing blast furnace slag and the silicon slag solves the problem that the porous material is prepared through repeated heating and heat preservation, and the porous material can be directly obtained through one-time heating and sintering, so that the energy consumption is remarkably reduced.
2. The method for preparing the porous ceramic from the titanium-containing blast furnace slag and the silicon slag provided by the invention avoids the preparation process of slurry, correspondingly eliminates the processes of drying the slurry, crushing and pulverizing the dried body and the like, and obviously improves and simplifies the technological process.
3. The method for preparing the porous ceramic from the titanium-containing blast furnace slag and the silicon slag directly uses the silicon slag waste, comprehensively utilizes industrial waste slag such as the titanium-containing blast furnace slag and the silicon slag, avoids the use of new materials as much as possible, avoids the use of expensive materials such as silicon carbide, lithium carbonate, management and control materials such as potassium permanganate, and has good social and economic benefits.
Drawings
FIG. 1 is a SEM microstructure morphology graph of a porous ceramic section obtained by the method for preparing the porous ceramic by using the titanium-containing blast furnace slag and the silica slag
FIG. 2 is a photograph of a porous ceramic section obtained by the method for preparing porous ceramic from titanium-containing blast furnace slag and silica slag according to the present invention
Detailed Description
Embodiments of the present invention will be described in detail below with reference to specific examples, but it will be understood by those skilled in the art that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention. The examples were conducted under conventional conditions, except that the specific conditions were not specified.
The method for preparing porous ceramics from the titanium-containing blast furnace slag and the silicon slag comprises the following steps:
A. respectively crushing titanium-containing blast furnace slag, silicon slag, shale, quartz sand, limestone (carbonate), boric acid and phosphate to a granularity of 0.5mm, and uniformly mixing until the mixing degree is more than or equal to 98.5%; sintering in a high temperature furnace for 0.5-2 h;
B. after the reaction is completed, cooling to room temperature to obtain the porous ceramic.
Example 1
Respectively crushing 5g of titanium-containing blast furnace slag, 0.5g of silica slag, 3.5g of shale, 1.5g of quartz sand, 0.5g of limestone (carbonate), 1.5g of boric acid and 0.5g of phosphate to 0.5mm of granularity, and uniformly mixing until the uniformity is more than or equal to 98.5%; placing the mixture into a high-temperature furnace, and sintering the mixture for 2 hours at 1000 ℃; after the reaction is completed, cooling to room temperature to obtain the porous ceramic. The apparent density of the ceramic is 0.43g cm -3 The compressive strength is 7.7MPa, and the flexural strength is 3.5MPa. The experimental data are shown in table 1.
Example 2
Respectively crushing 5g of titanium-containing blast furnace slag, 0.75g of silica slag, 3.5g of shale, 1.5g of quartz sand, 0.3g of limestone (carbonate), 1.5g of boric acid and 0.5g of phosphate to 0.5mm of granularity, and uniformly mixing until the uniformity is more than or equal to 98.5%; sintering in a high temperature furnace at 1070 deg.c for 1 hr; reactionAnd after cooling to room temperature, obtaining the porous ceramic. The apparent density of the ceramic is 0.47g cm -3 The compressive strength is 7.8MPa, and the flexural strength is 4.0MPa. The experimental data are shown in table 1.
Example 3
Respectively crushing 5g of titanium-containing blast furnace slag, 0.75g of silica slag, 3.5g of shale, 1.5g of quartz sand, 0.3g of limestone (carbonate), 1.5g of boric acid and 0.5g of phosphate to 0.5mm of granularity, and uniformly mixing until the uniformity is more than or equal to 98.5%; placing the mixture into a high-temperature furnace, and sintering the mixture for 1h at 1150 ℃; after the reaction is completed, cooling to room temperature to obtain the porous ceramic. The apparent density of the ceramic is 0.42g cm -3 The compressive strength is 7.9MPa, and the flexural strength is 3.9MPa. The experimental data are shown in table 1.
Example 4
Respectively crushing 5g of titanium-containing blast furnace slag, 1.0g of silica slag, 3.5g of shale, 1.5g of quartz sand, 0.2g of limestone (carbonate), 0.5g of boric acid and 1.0g of phosphate to 0.5mm of granularity, and uniformly mixing until the uniformity is more than or equal to 98.5%; sintering in a high temperature furnace at 1170 ℃ for 0.5h; after the reaction is completed, cooling to room temperature to obtain the porous ceramic. The apparent density of the ceramic is 0.5g cm -3 The compressive strength is 8.0MPa, and the flexural strength is 4.0MPa. The experimental data are shown in table 1.
Example 5
Respectively crushing 5g of titanium-containing blast furnace slag, 1.25g of silica slag, 3.5g of shale, 1.5g of quartz sand, 0.1g of limestone (carbonate), 0.5g of boric acid and 1.0g of phosphate to 0.5mm of granularity, and uniformly mixing until the uniformity is more than or equal to 98.5%; placing the mixture into a high-temperature furnace, and sintering the mixture for 0.3h at 1200 ℃; after the reaction is completed, cooling to room temperature to obtain the porous ceramic. The apparent density of the ceramic is 0.52g cm -3 The compressive strength is 8.1MPa, and the flexural strength is 3.8MPa. The experimental data are shown in table 1.
TABLE 1
The present embodiment is merely illustrative of the invention and not intended to be limiting, and those skilled in the art will make modifications or improvements on the basis of the present invention after reading the description of the invention, but are protected by the patent laws within the scope of the claims of the present invention.
Claims (7)
1. The method for preparing the porous ceramic from the titanium-containing blast furnace slag and the silicon slag is characterized by comprising the following steps of:
a. uniformly mixing titanium-containing blast furnace slag, silicon slag, shale, quartz sand, limestone, boric acid and phosphate according to the mass ratio of 100:10-25:70:30:2-10:10-30:10-20, and sintering at 1000-1200 ℃ for 0.5-2 h with the balance of unavoidable impurities;
b. and after the sintering is finished, cooling the sintered product to room temperature to obtain the porous ceramic.
2. The method for preparing porous ceramics from titanium-containing blast furnace slag and silica slag according to claim 1, wherein the titanium-containing blast furnace slag, silica slag, shale, quartz sand, limestone, boric acid and phosphate in the step a are uniformly mixed according to the mass ratio of 100:15-25:70:30:2-4:10-15:20.
3. The method for preparing porous ceramics from titanium-containing blast furnace slag and silica slag according to claim 1, wherein the granularity of the titanium-containing blast furnace slag, silica slag, shale, quartz sand, limestone, boric acid and phosphate in the step a is less than or equal to 0.5mm.
4. The method for preparing porous ceramics from titanium-containing blast furnace slag and silica slag according to claim 1, wherein the mixing uniformity of the titanium-containing blast furnace slag, silica slag, shale, quartz sand, limestone, boric acid and phosphate in the step a is more than or equal to 98.5%.
5. The method for preparing porous ceramics from titanium-containing blast furnace slag and silica slag according to claim 1, wherein the sintering time in the step a is 0.5-1 h.
6. The porous ceramic produced by the method for producing porous ceramic from titanium-containing blast furnace slag and silica slag according to any one of claims 1 to 5.
7. The porous ceramic according to claim 6, wherein: the apparent density of the porous ceramic is 0.4-0.52 g/cm -3 The compressive strength is 7.5-8.2 MPa, and the flexural strength is 3.5-4.0 MPa.
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