CN108046781B - Preparation process of high-strength ceramsite sand - Google Patents
Preparation process of high-strength ceramsite sand Download PDFInfo
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- CN108046781B CN108046781B CN201711496288.6A CN201711496288A CN108046781B CN 108046781 B CN108046781 B CN 108046781B CN 201711496288 A CN201711496288 A CN 201711496288A CN 108046781 B CN108046781 B CN 108046781B
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- 239000004576 sand Substances 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 31
- 239000000843 powder Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 239000011265 semifinished product Substances 0.000 claims abstract description 13
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 12
- 239000000919 ceramic Substances 0.000 claims abstract description 11
- 238000010304 firing Methods 0.000 claims abstract description 9
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 8
- 239000011572 manganese Substances 0.000 claims abstract description 8
- 229940037003 alum Drugs 0.000 claims abstract description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims abstract description 6
- 229910052601 baryte Inorganic materials 0.000 claims abstract description 6
- 239000010428 baryte Substances 0.000 claims abstract description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052845 zircon Inorganic materials 0.000 claims abstract description 6
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000007598 dipping method Methods 0.000 claims abstract description 4
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000007873 sieving Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 11
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 9
- 239000003232 water-soluble binding agent Substances 0.000 claims description 9
- 238000012216 screening Methods 0.000 claims description 7
- 239000011362 coarse particle Substances 0.000 claims description 6
- 239000004927 clay Substances 0.000 claims description 5
- CAQWNKXTMBFBGI-UHFFFAOYSA-N C.[Na] Chemical compound C.[Na] CAQWNKXTMBFBGI-UHFFFAOYSA-N 0.000 claims description 3
- 239000004115 Sodium Silicate Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005261 decarburization Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000003469 silicate cement Substances 0.000 claims description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 238000005470 impregnation Methods 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 17
- 229910052593 corundum Inorganic materials 0.000 abstract description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052681 coesite Inorganic materials 0.000 abstract description 2
- 239000010431 corundum Substances 0.000 abstract description 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052863 mullite Inorganic materials 0.000 abstract description 2
- 239000000377 silicon dioxide Substances 0.000 abstract description 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 2
- 229910052682 stishovite Inorganic materials 0.000 abstract description 2
- 229910052905 tridymite Inorganic materials 0.000 abstract description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 239000002893 slag Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- -1 shale Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
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- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
-
- 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
- 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
- C04B2235/3215—Barium oxides or oxide-forming salts thereof
-
- 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
- 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
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
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- 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
- 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
- C04B2235/3262—Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
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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
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
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- C—CHEMISTRY; METALLURGY
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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
- C04B2235/34—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
- C04B2235/3427—Silicates other than clay, e.g. water glass
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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
- C04B2235/40—Metallic constituents or additives not added as binding phase
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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
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/448—Sulphates or sulphites
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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
- C04B2235/48—Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
- C04B2235/483—Si-containing organic compounds, e.g. silicone resins, (poly)silanes, (poly)siloxanes or (poly)silazanes
Abstract
The invention discloses a preparation process of high-strength ceramsite sand, which comprises the following components, by weight, firstly, selecting 90 parts of bauxite raw material, 2-8 parts of barite, 0.3-1.0 part of alum, 3-6 parts of ferric oxide, 1-3 parts of manganese ore powder, 0.2-0.5 part of zircon sand and 1-4 parts of barium oxide, respectively grinding into fine powder, sieving with 300 meshes, mixing and stirring to form a primary stirring material. And then, quickly forming uniform coarse grains on a shaking screen, immersing the coarse grains in a dipping liquid tank, taking out, and continuously stirring to prepare a round grain semi-finished product blank. And then firing. According to the invention, the selected raw materials are reasonable in compatibility of each component, the manganese ore powder is adopted to help the ceramic sand blank to react with Al2O3 and SiO2 contained in the blank under the high-temperature condition of the rotary kiln, and other components are catalyzed, so that more mullite phases and partial corundum phases can be formed, and the aim of improving the compressive strength of the ceramic proppant is fulfilled.
Description
Technical Field
The invention relates to the technical field of ceramic particle sand preparation processes, in particular to a process for preparing ceramic particle sand with high strength and high efficiency.
Background
The ceramic grain is an artificial lightweight aggregate, has a hard shell, is internally provided with a microporous ceramic grain, has good heat insulation and fire resistance, is provided with a water-proof and air-retaining glaze layer on the surface, has low water absorption, good impermeability and shock resistance, good frost resistance and durability, and has excellent physical, chemical and hydraulic characteristics. In order to improve the defects of the aerated concrete, some manufacturers add ceramsite into the aerated concrete, so that not only is the framework structure of the concrete enhanced, but also the advantages of the aerated concrete can be effectively maintained, the quality common problem of the aerated concrete is overcome, the high-strength characteristic is fully exerted, and the energy consumption is reduced. However, since the ceramsite is hollow lightweight aggregate, the ceramsite is easy to float up due to high specific gravity of slurry in the stirring process, so that the defects of products are formed, and on the other hand, the ceramsite aggregate is low in self strength and is easy to damage in the stirring process, so that the self water absorption rate of the ceramsite is increased, and the heat insulation performance of the products is reduced.
In the existing preparation process of the ceramsite, clay, shale, fly ash, coal mine stripper, loess, sludge and the like are mainly used as main raw materials. Because clay, shale, loess, sludge and the like are excavated, water and soil loss, environmental pollution and ecological balance are caused, and the method is not suitable for popularization and application. On the other hand, the remaining industrial wastes and slag of chemical enterprises, such as aluminum factory waste slag or aluminum sulfate factory waste slag, and coal gangue and fly ash, etc., cannot be effectively treated and recycled.
Disclosure of Invention
Aiming at the problems of high raw material cost, easy environmental damage and the like in the existing ceramsite preparation process, the invention provides the ceramsite preparation process capable of providing ceramsite strength.
In order to solve the technical problems, the following technical scheme is adopted: a preparation process of high-strength ceramic sand comprises the following steps.
(1) Preparing raw materials: the raw bauxite material is prepared by the following components, by weight, 90 parts of bauxite raw material, 2-8 parts of barite, 0.3-1.0 part of alum, 3-6 parts of ferric oxide, 1-3 parts of manganese ore powder, 0.2-0.5 part of zircon sand and 1-4 parts of barium oxide, grinding the raw bauxite material into fine powder respectively, sieving the fine powder with 300 meshes, mixing and stirring to form a primary stirring material.
(2) Atomizing the primary stirring material by using 5% of water, adding 0.2-0.5% of water-soluble binder, and rapidly forming uniform coarse grains on a shaking screen, wherein the granularity is 200 meshes; the shaking screen comprises a base and a screen body, and a driving mechanism: the base is provided with a rotating frame through a driving rotating mechanism, one side of the upper part of the rotating frame is provided with a support, and the upper end of the support is hinged to the bottom of the screen body; a vertical guide sleeve is fixed at the other end of the upper part of the rotating frame, a push-pull rod is sleeved in the guide sleeve in a matching way, and the upper end of the push-pull rod is hinged at the bottom of the screen body; the swing motor is further arranged on the rotating frame, an eccentric shaft turntable is arranged on a rotating shaft of the swing motor, an eccentric shaft is fixed on the eccentric shaft turntable, the lower end of the push-pull rod is hinged with a swing rod, and the lower end of the swing rod is hinged on the eccentric shaft.
(3) Firstly, preparing 0.1 to O.5 percent of methyl sodium silicate solution by weight percent, and then adding 10 to 30 percent of silicate cement by weight percent to prepare the impregnating solution.
(4) Immersing the coarse particles in the step (2) in a dipping liquid pond for 1-2 seconds, taking out, adding the immersed coarse particles into a granulator for secondary stirring, continuously adding 10-20 parts of clay powder and 2-5 parts of zinc powder while continuously adding primary stirring materials, atomizing by using 5% of water, adding 0.1-0.5% of water-soluble binder, and continuously stirring until the granularity is increased to 10-30 meshes of secondary semi-finished products.
(5) Stopping adding the powder, stopping supplementing atomized water and the water-soluble binder, continuously adding 1-2 parts of zinc powder, stirring for 30 minutes, stopping adding zinc, and continuously stirring for 3-5 hours to prepare the round semi-finished product blank.
(6) Taking out the semi-finished product blank, and then passing through a 8-30 mesh screen, and then delivering to a rotary kiln for firing.
(7) Firing: after the semi-finished product blank is put into a kiln, heating to 300-500 ℃ at 20-30 ℃/min at the kiln head position, and maintaining for 10-30 min to carry out decarburization; and then raising the temperature of the kiln head to 1300-1400 ℃ at 10-20 ℃/min, and preserving the temperature of the kiln tail to 300-350 ℃ for more than 90 minutes to perform the quality guarantee process.
(8) Cooling and discharging from the kiln.
Further, the primary stirring material is prepared by selecting, by weight, 90 parts of bauxite raw material, 4-6 parts of barite, 0.5-0.8 part of alum, 3-5 parts of ferric oxide, 2-3 parts of manganese ore powder, 0.3-0.5 part of zircon sand and 2-4 parts of barium oxide.
The screening machine is characterized in that a filter screen is transversely arranged on the inner side of the screen body, a qualified blank screening chamber is arranged in the area on the upper side of the filter screen, a crushed aggregates collecting chamber is arranged in the area on the lower side of the filter screen, and a blank discharging port and a crushed aggregates discharging port are respectively arranged on one side of the screening chamber and one side of the collecting chamber.
The screen body is arranged at the eccentric position of the rotating frame, namely the axial direction of the screen body is not overlapped with the rotating axial direction of the rotating frame.
The beneficial effects are that: according to the invention, the selected raw materials are reasonable in compatibility of each component, the manganese ore powder is adopted to help the ceramic sand blank to react with Al2O3 and SiO2 contained in the blank under the high-temperature condition of the rotary kiln, and other components are catalyzed, so that more mullite phases and partial corundum phases can be formed, and the aim of improving the compressive strength of the ceramic proppant is fulfilled.
According to the invention, a few of the raw materials are quickly nucleated firstly by using the shaking screen, so that the nucleation time is saved, and the granulation efficiency is improved. The shaking screen used can keep the material separation and the tiny nuclei in the screen body in the rotating process, has the function of jolting up and down, can ensure that the periphery of the screen body always has an area with one side lower than the periphery after the combination of the rotating function and the shaking function, and can realize the process of alternating low-level and high-level at the periphery of the screen body, thereby being very beneficial to the process of initial granulation.
In the firing process, the firing processes with different degrees are adopted for a plurality of times, so that the sintering strength and the sintering performance are improved. Therefore, the invention improves the density, strength and hydrophobicity of the ceramsite, and has smooth surface of the pellet and good effect.
Drawings
Fig. 1 is a schematic view of a shaker screen according to the present invention.
Reference numerals in the drawings: 1 is a base, 2 is a driving rotating mechanism, 3 is a rotating frame, 4 is a swinging motor, 5 is an eccentric shaft turntable, 6 is a swinging rod, 7 is a push-pull rod, 8 is a guide sleeve, 9 is a screen body, 10 is a filter screen, 11 is a crushed aggregates collecting chamber, 12 is a blank discharge port, 13 is a crushed aggregates discharge port, and 14 is a support.
Description of the embodiments
Example 1: a preparation process of high-strength ceramic sand comprises the following steps:
(1) Preparing raw materials: the raw bauxite material is prepared by the following components, by weight, 90 parts of bauxite raw material, 2-8 parts of barite, 0.3-1.0 part of alum, 3-6 parts of ferric oxide, 1-3 parts of manganese ore powder, 0.2-0.5 part of zircon sand and 1-4 parts of barium oxide, grinding the raw bauxite material into fine powder respectively, sieving the fine powder with 300 meshes, mixing and stirring to form a primary stirring material.
(2) Atomizing the primary stirring material by using 5% of water, adding 0.2-0.5% of water-soluble binder, and rapidly forming uniform coarse grains on a shaking screen, wherein the granularity is 200 meshes.
The shaking screen comprises a base, a screen body and a driving mechanism, wherein the base is provided with a rotating frame through the driving rotating mechanism, a support is arranged on one side of the upper part of the rotating frame, and the upper end of the support is hinged to the bottom of the screen body; a vertical guide sleeve is fixed at the other end of the upper part of the rotating frame, a push-pull rod is sleeved in the guide sleeve in a matching way, and the upper end of the push-pull rod is hinged at the bottom of the screen body; the swing motor is further arranged on the rotating frame, an eccentric shaft turntable is arranged on a rotating shaft of the swing motor, an eccentric shaft is fixed on the eccentric shaft turntable, the lower end of the push-pull rod is hinged with a swing rod, and the lower end of the swing rod is hinged on the eccentric shaft.
(3) Firstly, preparing 0.1 to O.5 percent of methyl sodium silicate solution by weight percent, and then adding 10 to 30 percent of silicate cement by weight percent to prepare the impregnating solution.
(4) Immersing the coarse particles in the step (2) in a dipping liquid pond for 1-2 seconds, taking out, adding the immersed coarse particles into a granulator for secondary stirring, continuously adding 10-20 parts of clay powder and 2-5 parts of zinc powder while continuously adding primary stirring materials, atomizing by using 5% of water, adding 0.1-0.5% of water-soluble binder, and continuously stirring until the granularity is increased to 10-30 meshes of secondary semi-finished products.
(5) Stopping adding the powder, stopping supplementing atomized water and the water-soluble binder, continuously adding 1-2 parts of zinc powder, stirring for 30 minutes, stopping adding zinc, and continuously stirring for 3-5 hours to prepare the round semi-finished product blank.
(6) Taking out the semi-finished product blank, and then passing through a 8-30 mesh screen, and then delivering to a rotary kiln for firing.
(7) Firing: after the semi-finished product blank is put into a kiln, heating to 300-500 ℃ at 20-30 ℃/min at the kiln head position, and maintaining for 10-30 min to carry out decarburization; and then raising the temperature of the kiln head to 1300-1400 ℃ at 10-20 ℃/min, and preserving the temperature of the kiln tail to 300-350 ℃ for more than 90 minutes to perform the quality guarantee process.
(8) Cooling and discharging from the kiln.
Example 2: based on the embodiment 1, the primary stirring material comprises the following components, by weight, 90 parts of bauxite raw material, 4-6 parts of barite, 0.5-0.8 part of alum, 3-5 parts of ferric oxide, 2-3 parts of manganese ore powder, 0.3-0.5 part of zircon sand and 2-4 parts of barium oxide.
Example 3: on the basis of the embodiment 1, a filter screen is transversely arranged on the inner side of the screen body, a qualified blank screening chamber is arranged in a region on the upper side of the filter screen, a crushed aggregates collecting chamber is arranged in a region on the lower side of the filter screen, and a blank discharging port and a crushed aggregates discharging port are respectively arranged on one side of the screening chamber and one side of the collecting chamber.
Example 4: on the basis of the embodiment 1, the screen body is arranged at the eccentric position of the rotating frame, namely the axial direction of the screen body is not overlapped with the rotating axial direction of the rotating frame. In this case, the flip width can be significantly increased.
Claims (1)
1. The preparation process of the high-strength ceramic sand is characterized by comprising the following steps of:
(1) Preparing raw materials: the raw bauxite material is prepared by the following components, by weight, 90 parts of bauxite raw material, 4-6 parts of barite, 0.5-0.8 part of alum, 3-5 parts of ferric oxide, 2-3 parts of manganese ore powder, 0.3-0.5 part of zircon sand and 2-4 parts of barium oxide, grinding the raw bauxite material into fine powder respectively, sieving the fine powder with 300 meshes, mixing and stirring to form a primary stirring material;
(2) Atomizing the primary stirring material by using 5% of water, adding 0.2-0.5% of water-soluble binder, and rapidly forming uniform coarse grains on a shaking screen, wherein the granularity is 200 meshes; the shaking screen comprises a base (1), a driving rotating mechanism (2), a rotating frame (3), a swinging motor (4), an eccentric shaft turntable (5), a swinging rod (6), a push-pull rod (7), a guide sleeve (8), a screen body (9), a filter screen (10), a crushed aggregates collecting chamber (11), a blank discharging port (12), a crushed aggregates discharging port (13) and a support (14), wherein the rotating frame (3) is arranged on the base (1) through the driving rotating mechanism (2), the support (14) is arranged on one side of the upper part of the rotating frame (3), and the upper end of the support (14) is hinged to the bottom of the screen body (9); a vertical guide sleeve (8) is fixed at the other end of the upper part of the rotating frame (3), a push-pull rod (7) is sleeved in the guide sleeve (8) in a matching way, and the upper end of the push-pull rod (7) is hinged at the bottom of the screen body (9); a swinging motor (4) is further arranged on the rotating frame (3), an eccentric shaft turntable (5) is arranged on a rotating shaft of the swinging motor (4), an eccentric shaft is fixed on the eccentric position of the eccentric shaft turntable (5), the lower end of the push-pull rod (7) is hinged with a swinging rod (6), and the lower end of the swinging rod (6) is hinged on the eccentric shaft; a filter screen (10) is transversely arranged on the inner side of the screen body (9), a qualified blank screening chamber is arranged in the area on the upper side of the filter screen (10), a crushed aggregates collecting chamber (11) is arranged in the area on the lower side of the filter screen (10), and a blank discharging port (12) and a crushed aggregates discharging port (13) are respectively arranged on one side of the screening chamber and one side of the collecting chamber; the screen body (9) is arranged at the eccentric position of the rotating frame (3), namely the axial direction of the screen body (9) is not overlapped with the rotating axial direction of the rotating frame (3), so as to improve the overturning amplitude;
(3) Firstly, preparing 0.1 to 0.5 weight percent of methyl sodium silicate solution, and then adding 10 to 30 weight percent of silicate cement to prepare impregnation liquid;
(4) Immersing coarse particles in the step (2) in a dipping liquid pond for 1-2 seconds, taking out, adding the immersed coarse particles into a granulator for secondary stirring, continuously adding 10-20 parts of clay powder and 2-5 parts of zinc powder while continuously adding primary stirring materials, atomizing by using 5% of water, adding 0.1-0.5% of water-soluble binder, and continuously stirring until the granularity is increased to 10-30 meshes of secondary semi-finished products;
(5) Stopping adding powder, stopping supplementing atomized water and a water-soluble binder, continuously adding 1-2 parts of zinc powder, stirring for 30 minutes, stopping adding zinc, and continuously stirring for 3-5 hours to prepare a round semi-finished product blank;
(6) Taking out the semi-finished product blank, and then passing through a 8-30 mesh screen, and then delivering to a rotary kiln for firing;
(7) Firing: after the semi-finished product blank is put into a kiln, heating to 300-500 ℃ at 20-30 ℃/min at the kiln head position, and maintaining for 10-30 min to carry out decarburization; raising the temperature of the kiln head to 1300-1400 ℃ at 10-20 ℃/min, and preserving the temperature of the kiln tail to 300-350 ℃ for more than 90 min for quality guarantee;
(8) Cooling and discharging from the kiln.
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| CN109293371B (en) * | 2018-09-30 | 2021-07-20 | 柳晶（长春）环保科技有限公司 | Process for preparing ceramsite by using construction waste |
| CN110093149A (en) * | 2019-06-03 | 2019-08-06 | 太原理工大学 | A kind of preparation method of gangue Quito hole ceramsite propping agent |
| CN113564356A (en) * | 2021-07-28 | 2021-10-29 | 河南建杰实业有限公司 | Adhesive for zinc-containing dedusting ash pellets of rotary hearth furnace and preparation method thereof |
| CN114273224B (en) * | 2021-12-27 | 2023-12-22 | 程昱锦 | Wet soft viscidity granule material letter sorting equipment |
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