CN116023152A - High-temperature sintering aid and application thereof - Google Patents
High-temperature sintering aid and application thereof Download PDFInfo
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- CN116023152A CN116023152A CN202211737732.XA CN202211737732A CN116023152A CN 116023152 A CN116023152 A CN 116023152A CN 202211737732 A CN202211737732 A CN 202211737732A CN 116023152 A CN116023152 A CN 116023152A
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- temperature sintering
- aluminum
- sintering aid
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- 238000005245 sintering Methods 0.000 title claims abstract description 67
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000002994 raw material Substances 0.000 claims abstract description 33
- 239000000919 ceramic Substances 0.000 claims abstract description 26
- 239000002910 solid waste Substances 0.000 claims abstract description 21
- 239000011521 glass Substances 0.000 claims abstract description 20
- 239000012528 membrane Substances 0.000 claims abstract description 20
- 239000002689 soil Substances 0.000 claims abstract description 20
- 239000010459 dolomite Substances 0.000 claims abstract description 18
- 229910000514 dolomite Inorganic materials 0.000 claims abstract description 18
- 239000000454 talc Substances 0.000 claims abstract description 18
- 229910052623 talc Inorganic materials 0.000 claims abstract description 18
- 235000012222 talc Nutrition 0.000 claims abstract description 18
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 16
- 239000011707 mineral Substances 0.000 claims abstract description 16
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011591 potassium Substances 0.000 claims abstract description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 9
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 19
- 239000010881 fly ash Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- -1 sojourn Inorganic materials 0.000 claims description 9
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 8
- 229910052796 boron Inorganic materials 0.000 claims description 8
- 239000005365 phosphate glass Substances 0.000 claims description 8
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 claims description 7
- 239000012752 auxiliary agent Substances 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000010882 bottom ash Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 238000004131 Bayer process Methods 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 claims description 2
- 229910021538 borax Inorganic materials 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 238000001723 curing Methods 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229910052573 porcelain Inorganic materials 0.000 claims description 2
- 239000005368 silicate glass Substances 0.000 claims description 2
- 239000004328 sodium tetraborate Substances 0.000 claims description 2
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 2
- 229910052642 spodumene Inorganic materials 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims description 2
- 229940036051 sojourn Drugs 0.000 claims 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 18
- 238000002156 mixing Methods 0.000 description 18
- 239000000463 material Substances 0.000 description 15
- 238000005303 weighing Methods 0.000 description 14
- 238000000227 grinding Methods 0.000 description 11
- 239000000155 melt Substances 0.000 description 11
- 239000007791 liquid phase Substances 0.000 description 9
- 229920002472 Starch Polymers 0.000 description 7
- 239000001913 cellulose Substances 0.000 description 7
- 229920002678 cellulose Polymers 0.000 description 7
- 239000008107 starch Substances 0.000 description 7
- 235000019698 starch Nutrition 0.000 description 7
- 230000032683 aging Effects 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000008213 purified water Substances 0.000 description 6
- 239000002383 tung oil Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007767 bonding agent Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 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 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910000502 Li-aluminosilicate Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical class [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 description 1
- YAIQCYZCSGLAAN-UHFFFAOYSA-N [Si+4].[O-2].[Al+3] Chemical compound [Si+4].[O-2].[Al+3] YAIQCYZCSGLAAN-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- 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
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a high-temperature sintering aid and application thereof. The high-temperature sintering agent comprises glass raw materials, silicon-aluminum minerals of potassium and/or lithium, suzhou soil, talcum, dolomite and other raw materials, the sintering aid can enable the silicon-aluminum solid waste raw materials for preparing the ceramic membrane support to be sintered and molded at 1050-1150 ℃, and the strength of the obtained ceramic membrane support can reach 30MPa, and the porosity is 32%.
Description
Technical Field
The invention relates to a high-temperature sintering aid, in particular to a high-temperature sintering aid for preparing a silicon-aluminum ceramic membrane support body from silicon-aluminum solid waste, and a use method thereof, and belongs to the technical field of ceramic material preparation.
Background
At present, the raw material of the method for preparing the ceramic flat membrane is mainly alumina, and the cost for preparing the ceramic flat membrane by using the alumina is high. For example, chinese patent (CN 108246119A) discloses a ceramic flat membrane for sewage treatment and a preparation method thereof, wherein the main raw materials are alpha-alumina, titanium oxide and silicon oxide powder particles, and the sintering temperature reaches 1350 ℃; the chinese patent (CN 109851328A) discloses a process for preparing a high-performance ceramic flat membrane support, which uses alumina powder with a proportion of up to 60-80%, and sintering temperature up to 1200-1500 ℃, because pure commercial alumina is basically used to prepare the ceramic flat membrane in the existing process, on one hand, alumina itself is high in price, which results in high raw material cost, and on the other hand, sintering temperature required for sintering the ceramic flat membrane with alumina is high, which results in high sintering cost, and on the other hand, the existing ceramic flat membrane has the defects of high raw material cost, high sintering energy consumption and the like, which results in high product price, insufficient market competitiveness, and urgent need to solve the related problems.
The solid waste of silicon aluminum series such as fly ash, coal gangue, red mud, and the like has abundant reserves, contains a large amount of active silicon (aluminum) oxide tetrahedron, abundant metal oxide, and other useful components, and can realize the high-efficiency utilization of the solid waste of silicon aluminum such as fly ash, and the like if being applied to the preparation of ceramic flat plate films, and greatly reduce the production cost of products, but still has the technical problems of low solid waste utilization rate, high sintering temperature, low porosity, and the like.
Disclosure of Invention
In order to solve the technical problems in the prior art, a first object of the present invention is to provide a high-temperature sintering aid which enables a silicon-aluminum solid waste raw material to be sintered and formed in a wide temperature range, and to obtain a ceramic material with high strength and high porosity.
A second object of the present invention is to provide an application of a high-temperature sintering aid in preparing a silicon-aluminum ceramic membrane support from silicon-aluminum solid wastes, which can greatly reduce the sintering temperature of silicon-aluminum raw materials, particularly silicon-aluminum solid wastes, and obtain a wider sintering temperature range, and can obtain a ceramic membrane support with high strength and high porosity from silicon-aluminum solid wastes, thereby realizing high-value conversion of the silicon-aluminum solid wastes.
In order to achieve the technical purpose, the invention provides a high-temperature sintering aid which comprises glass raw materials, potassium and/or lithium silicon-aluminum minerals, suzhou soil, talcum and dolomite.
The high-temperature sintering aid is a compound of glass raw materials, potassium and/or lithium silicon-aluminum minerals, suzhou soil, talcum and dolomite, and has obvious synergistic effect on reducing the sintering temperature of silicon-aluminum raw materials and promoting the generation of ceramic phases. The glass raw material can generate a small amount of liquid phase in a medium temperature section, raw material particles can be bonded to generate strength, products are prevented from being cracked, potassium and/or lithium silicon-aluminum minerals and the like mainly can generate liquid phase in a gradient manner in a high temperature section, the viscosity of the liquid phase is gradually reduced along with the temperature rise, the viscosity and fluidity of the whole liquid phase of the bonding agent can be adjusted, the sintering control and deformation prevention are facilitated in production, and Suzhou soil, talcum, dolomite and the like can provide partial calcium oxide and magnesium oxide in a system as network modified bodies of glass, and can also enter the melt as a fluxing agent after a blank body is about 1000 ℃ in appearance of the melt, so that more defects are generated in the melt, the viscosity of the melt can be reduced, the activity and corrosiveness of the melt are improved, the fusion of the particles are facilitated, the precipitation of mullite crystals is promoted, and the sintering process of the blank body is strengthened.
As a preferred embodiment, the glass raw material includes at least one of boron glass frit, boron frit, borax, phosphate glass frit, and silicate glass frit.
As a preferable embodiment, the softening temperature of the glass raw material is 700 to 900 ℃.
As a preferred embodiment, the potassium and/or lithium aluminosilicate mineral comprises at least one of potassium feldspar, lithium porcelain stone, spodumene.
As a preferred scheme, the high-temperature sintering aid comprises the following components in parts by mass: 15-30 parts of glass raw materials, 25-50 parts of potassium and/or lithium silicon-aluminum minerals, 15-25 parts of Suzhou soil, 10-15 parts of talcum and 4-7 parts of dolomite. The proportions of the components of the high-temperature sintering aid should be coordinated to achieve the best synergistic effect, for example, the too high proportion of the glass raw materials can lead to large sintering shrinkage of the product, a large amount of liquid phase fills gaps, the surface aperture of the product is reduced, the porosity is reduced, if the content of the glass raw materials is too low, the sintering aid effect is not obvious, and the target required temperature cannot be reached; the Suzhou soil and the lithium-containing minerals mainly play a role in coordinating and adjusting the melt viscosity, the melting temperature of the auxiliary agent is increased due to the fact that the ratio of the Suzhou soil to the lithium-containing minerals is too high, the sintering range of the auxiliary agent is narrow due to the fact that the ratio of the Suzhou soil to the lithium-containing minerals is too low, and uniformity control is not facilitated. The refractory degree of the Suzhou soil is higher than that of the lithium-containing mineral, and the control of the high-temperature melt viscosity of the Suzhou soil is weaker, so that the content of the Suzhou soil is slightly lower than that of the lithium-containing mineral, but the Suzhou soil can play a role in regulating components and increasing strength. The addition of talcum and dolomite, which are calculated by the ratio of calcium and magnesium, is controlled at a proper ratio, which is beneficial to reducing sintering temperature, if the total addition of talcum and dolomite is too high, the product is locally cracked, and meanwhile, the sintering temperature is too high, and if the total addition of talcum and dolomite is too low, the talcum and dolomite cannot fully react with other minerals, and the sintering temperature is also increased.
As a preferred embodiment, the sintering aid has a particle size of 5 to 7. Mu.m.
The invention also provides application of the high-temperature sintering aid as the high-temperature sintering aid for preparing the silicon-aluminum ceramic membrane support body from the silicon-aluminum solid waste.
As a preferable scheme, the silicon-aluminum ceramic membrane support is obtained by extrusion molding and sintering solidification of the following raw materials: solid waste of silicon aluminum, micron-sized alumina powder, plastic clay, pore-forming agent, temporary binder and the high-temperature sintering aid.
As a preferable scheme, the raw materials comprise the following components in parts by mass: 55-90 parts of silicon-aluminum solid waste, 5-25 parts of micron-sized alumina powder, 4-7 parts of pore-forming agent, 2-6 parts of temporary binder and 7-15 parts of high-temperature sintering auxiliary agent.
As a preferable scheme, the silicon-aluminum solid waste comprises at least one of fly ash, fly ash bottom ash, high-aluminum gangue, gasified slag, cinder, bayer process red mud, sintering process red mud and combined process red mud.
As a preferable mode, the granularity of the silicon aluminum solid waste is 8-12 mu m.
As a preferable scheme, the granularity of the micron-sized alumina powder is 5-10 mu m of alumina granularity, and particularly micron-sized alpha alumina powder.
As a preferred scheme, the pore-forming agent comprises at least one of starch and saw dust.
As a preferred embodiment, the temporary binder comprises cellulose.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the high-temperature sintering aid is used for preparing the silicon-aluminum ceramic membrane support, can obviously reduce the sintering temperature of silicon-aluminum raw materials and promote the generation of ceramic phases. The glass raw material can generate a small amount of liquid phase in a medium temperature section, raw material particles can be bonded to generate strength, products are prevented from being cracked, potassium and/or lithium silicon-aluminum minerals and the like mainly can generate liquid phase in a gradient manner in a high temperature section, the viscosity of the liquid phase is gradually reduced along with the temperature rise, the viscosity and fluidity of the whole liquid phase of the bonding agent can be adjusted, the sintering control and deformation prevention are facilitated in production, and Suzhou soil, talcum, dolomite and the like can provide partial calcium oxide and magnesium oxide in a system as network modified bodies of glass, and can also enter the melt as a fluxing agent after a blank body is about 1000 ℃ in appearance of the melt, so that more defects are generated in the melt, the viscosity of the melt can be reduced, the activity and corrosiveness of the melt are improved, the fusion of the particles are facilitated, the precipitation of mullite crystals is promoted, and the sintering process of the blank body is strengthened. When the high-temperature sintering auxiliary agent is used, the sintering curing temperature of the silicon-aluminum ceramic film support body can be adjusted at 1050-1150 ℃, the temperature range of the product can reach 35-50 ℃, and the uniformity of the product is better controlled, compared with the traditional ceramic film, after the bonding agent is used, the sintering temperature of the silicon-aluminum ceramic film support body can be reduced by 150-250 ℃, and natural gas 4572 cubic can be saved at most per ten thousand square meters of flat plate film, and the sintering energy consumption is reduced by about 26%.
According to the invention, under the precondition of using the high-temperature sintering auxiliary agent, the alumina raw material in the preparation process of the silicon-aluminum support can be replaced by the silicon-aluminum solid waste raw material, the performance of the produced ceramic membrane is equivalent to that of the ceramic membrane produced by the traditional process, the strength of the obtained ceramic membrane support can reach 30MPa, the porosity is 32%, and the application requirement is met, so that the raw material cost is greatly reduced, and the high-value conversion of solid waste is realized.
Detailed Description
The following specific examples are intended to illustrate the present invention in further detail, but are not intended to limit the scope of the claims.
The materials used in the examples below were commercial reagents of technical grade as such unless otherwise specified.
The fly ash referred to in the following examples and comparative examples is fly ash bottom ash.
Example 1
Step 1: weighing 85 parts of 10 mu m fly ash, 10 parts of 10 mu m alumina, 5 parts of cellulose and 6 parts of starch in parts by weight, placing the materials in a counter-current mixer, and mixing for 15 minutes;
step 2: weighing 20 parts of boron clinker, 4 parts of dolomite, 12 parts of talcum, 30 parts of potassium feldspar and 25 parts of Suzhou soil, using a rapid grinding rotation speed of 400r/min, grinding and mixing for 5min according to a ball-to-material ratio of 2:1, weighing 7 parts of evenly mixed materials, and placing the evenly mixed materials in a mixer in the step 1 for 10min.
Step 3: 18 parts of purified water, 2.5 parts of glycerol, 5 parts of 50% PVB solution and 1 part of tung oil are weighed, uniformly mixed by using a stirrer, poured into a mixer, and continuously mixed for 5 minutes to obtain pug.
Ageing pug at a constant temperature of 25 ℃ for 1 day, then performing pugging and molding by using an extruder to prepare a support body blank, drying the blank for 2 hours at 160 ℃ in microwaves, and then sintering by using a muffle furnace.
Example 2
Step 1: weighing 90 parts of 10 mu m fly ash, 10 parts of 5 mu m alumina, 5 parts of cellulose and 6 parts of starch in parts by weight, putting the materials into a counter-current mixer, and mixing for 15 minutes;
step 2: 15 parts of boron glass powder, 7 parts of dolomite, 10 parts of talcum, 45 parts of potassium feldspar and 15 parts of Suzhou soil are weighed, the rapid grinding rotation speed is 400r/min, the ball-material ratio is 2:1, grinding and mixing are carried out for 5min, 10 parts are weighed and placed in a mixer in the step 1 after being uniformly mixed, and mixing is carried out for 10min.
Step 3: 18 parts of purified water, 2.5 parts of glycerol, 5 parts of 50% PVB solution and 1 part of tung oil are weighed, uniformly mixed by using a stirrer, poured into a mixer, and continuously mixed for 5 minutes to obtain pug.
Ageing pug at a constant temperature of 25 ℃ for 1 day, then performing pugging and molding by using an extruder to prepare a support body blank, drying the blank for 2 hours at 160 ℃ in microwaves, and then sintering by using a muffle furnace.
Example 3
Step 1: weighing 85 parts of 10 mu m fly ash, 10 parts of 10 mu m alumina, 5 parts of cellulose and 6 parts of starch in parts by weight, placing the materials in a counter-current mixer, and mixing for 15 minutes;
step 2: weighing 30 parts of phosphate glass powder, 4 parts of dolomite, 15 parts of talcum, 25 parts of potassium feldspar and 20 parts of Suzhou soil, using a rapid grinding rotation speed of 400r/min, grinding and mixing for 5min according to a ball-to-material ratio of 2:1, weighing 15 parts of phosphate glass powder, placing the 15 parts of phosphate glass powder in a mixer in the step 1, and mixing for 10min.
Step 3: 18 parts of purified water, 2.5 parts of glycerol, 5 parts of 50% PVB solution and 1 part of tung oil are weighed, uniformly mixed by using a stirrer, poured into a mixer, and continuously mixed for 5 minutes to obtain pug.
Ageing pug at a constant temperature of 25 ℃ for 1 day, then performing pugging and molding by using an extruder to prepare a support body blank, drying the blank for 2 hours at 160 ℃ in microwaves, and then sintering by using a muffle furnace.
Comparative example 1
Step 1: weighing 85 parts of 10 mu m fly ash, 10 parts of 10 mu m alumina, 5 parts of cellulose and 6 parts of starch in parts by weight, placing the materials in a counter-current mixer, and mixing for 15 minutes;
step 2: 60 parts of boron clinker, 4 parts of dolomite, 12 parts of talcum, 30 parts of potassium feldspar and 25 parts of Suzhou soil are weighed, the rapid grinding rotation speed is 400r/min, the ball-to-material ratio is 2:1, grinding and mixing are carried out for 5min, 7 parts are weighed and placed in a mixer in the step 1 after being uniformly mixed, and mixing is carried out for 10min.
Step 3: 18 parts of purified water, 2.5 parts of glycerol, 5 parts of 50% PVB solution and 1 part of tung oil are weighed, uniformly mixed by using a stirrer, poured into a mixer, and continuously mixed for 5 minutes to obtain pug.
Ageing pug at a constant temperature of 25 ℃ for 1 day, then performing pugging and molding by using an extruder to prepare a support body blank, drying the blank for 2 hours at 160 ℃ in microwaves, and then sintering by using a muffle furnace.
Comparative example 2
Step 1: weighing 90 parts of 10 mu m fly ash, 10 parts of 5 mu m alumina, 5 parts of cellulose and 6 parts of starch in parts by weight, putting the materials into a counter-current mixer, and mixing for 15 minutes;
step 2: weighing 15 parts of boron glass powder, 7 parts of dolomite, 10 parts of talcum and 15 parts of Suzhou soil, grinding and mixing for 5min at a ball-to-material ratio of 2:1 at a speed of 400r/min, weighing 10 parts of the mixture after uniform mixing, and mixing for 10min in a mixer in the step 1.
Step 3: 18 parts of purified water, 2.5 parts of glycerol, 5 parts of 50% PVB solution and 1 part of tung oil are weighed, uniformly mixed by using a stirrer, poured into a mixer, and continuously mixed for 5 minutes to obtain pug.
Ageing pug at a constant temperature of 25 ℃ for 1 day, then performing pugging and molding by using an extruder to prepare a support body blank, drying the blank for 2 hours at 160 ℃ in microwaves, and then sintering by using a muffle furnace.
Comparative example 3
Step 1: weighing 85 parts of 10 mu m fly ash, 10 parts of 10 mu m alumina, 5 parts of cellulose and 6 parts of starch in parts by weight, placing the materials in a counter-current mixer, and mixing for 15 minutes;
step 2: weighing 30 parts of phosphate glass powder, 15 parts of dolomite, 30 parts of talcum, 25 parts of potassium feldspar and 20 parts of Suzhou soil, using a rapid grinding rotation speed of 400r/min, grinding and mixing for 5min according to a ball-to-material ratio of 2:1, weighing 15 parts of phosphate glass powder, placing the 15 parts of phosphate glass powder in a mixer in the step 1, and mixing for 10min.
Step 3: 18 parts of purified water, 2.5 parts of glycerol, 5 parts of 50% PVB solution and 1 part of tung oil are weighed, uniformly mixed by using a stirrer, poured into a mixer, and continuously mixed for 5 minutes to obtain pug.
Ageing pug at a constant temperature of 25 ℃ for 1 day, then performing pugging and molding by using an extruder to prepare a support body blank, drying the blank for 2 hours at 160 ℃ in microwaves, and then sintering by using a muffle furnace.
TABLE 1 comparison of effects of examples 1 to 3 and comparative examples 1 to 3
Claims (9)
1. A high temperature sintering aid, characterized by: silicon-aluminum minerals comprising glass raw materials, potassium and/or lithium, sojourn, talc and dolomite.
2. A high temperature sintering aid according to claim 1, wherein: the glass raw materials comprise at least one of boron glass powder, boron frit, borax, phosphate glass powder and silicate glass powder.
3. A high temperature sintering aid according to claim 1 or 2, characterized in that: the softening temperature of the glass raw material is 700-900 ℃.
4. A high temperature sintering aid according to claim 1, wherein: the potassium and/or lithium silicon-aluminum minerals comprise at least one of potassium feldspar, lithium porcelain stone and spodumene.
5. A high temperature sintering aid according to claim 1, 2 or 4, characterized in that: comprises the following components in parts by mass: 15-30 parts of glass raw materials, 25-50 parts of potassium and/or lithium silicon-aluminum minerals, 15-25 parts of Suzhou soil, 10-15 parts of talcum and 4-7 parts of dolomite.
6. Use of a high temperature sintering aid according to any of claims 1 to 5, characterized in that: the high-temperature sintering auxiliary agent is applied to the preparation of the silicon-aluminum ceramic membrane support body by silicon-aluminum solid waste.
7. The use of a high temperature sintering aid according to claim 6, wherein: the silicon-aluminum ceramic membrane support is prepared from raw materials including silicon-aluminum solid waste, micron alumina powder, plastic clay, pore-forming agent, temporary binder and the high-temperature sintering aid through extrusion molding, sintering and curing.
8. The use of a high temperature sintering aid according to claim 7, wherein: the raw materials comprise the following components in parts by mass: 55-90 parts of silicon-aluminum solid waste, 5-25 parts of micron-sized alumina powder, 4-7 parts of pore-forming agent, 2-6 parts of temporary binder and 7-15 parts of high-temperature sintering auxiliary agent.
9. The use of a high temperature sintering aid according to claim 8, wherein:
the silicon-aluminum solid waste comprises at least one of fly ash, fly ash bottom ash, high-aluminum coal gangue, gasified slag, coal slag, bayer process red mud, sintering process red mud and combined process red mud.
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| WO2006079208A1 (en) * | 2005-01-26 | 2006-08-03 | Global Synfrac Inc. | Lightweight proppant and method of making same |
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