CN106938909A - Dry powder paint prepared by a kind of fluorgypsum, fluorine white residue and preparation method thereof - Google Patents

Dry powder paint prepared by a kind of fluorgypsum, fluorine white residue and preparation method thereof Download PDF

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Publication number
CN106938909A
CN106938909A CN201710233218.5A CN201710233218A CN106938909A CN 106938909 A CN106938909 A CN 106938909A CN 201710233218 A CN201710233218 A CN 201710233218A CN 106938909 A CN106938909 A CN 106938909A
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China
Prior art keywords
fluorine
fluorgypsum
white
residue
white residue
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CN201710233218.5A
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Chinese (zh)
Inventor
徐松梅
傅强
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HUNAN NONFERROUS ENVIRONMENTAL PROTECTION BUILDING MATERIALS Co Ltd
Central South University
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HUNAN NONFERROUS ENVIRONMENTAL PROTECTION BUILDING MATERIALS Co Ltd
Central South University
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Priority to CN201710233218.5A priority Critical patent/CN106938909A/en
Publication of CN106938909A publication Critical patent/CN106938909A/en
Pending legal-status Critical Current

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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
    • 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
    • C04B28/14—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 containing calcium sulfate cements
    • C04B28/142—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 containing calcium sulfate cements containing synthetic or waste calcium sulfate 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/0481—Other specific industrial waste materials not provided for elsewhere in C04B18/00
    • 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
    • C04B2111/00482—Coating or impregnation materials
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Civil Engineering (AREA)
  • Paints Or Removers (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

Dry powder paint prepared by a kind of fluorgypsum, fluorine white residue, its each component percentage by weight is：(1) fluorine gypsum powder 40~60%；(2) fluorine white residue 15 25%；(3) white cement 5~10%；(4) quick lime 5~20%；(5) sulphate activation agent 0.5~1%；(6) tackifier 3~8%；(7) lignocellulosic 0.1~0.5%；(8) water-loss reducer 0.1%~0.5%；(9) thixotropic lubricant 0.2~0.5%；(10) dispersant 0.1~0.3% (11) defoamer 0.1~0.5%.Production method：Each raw material in (1)~(11) is put into ball mill by preset blending ratio, combined grinding to 320 mesh screen residue≤6%, you can dry powder paint is made.Dry powder paint is prepared for primary raw material using the discarded fluorgypsum and fluorine white residue of fluorine chemical industry emission, cementitiousness is strong, and whiteness is high, and water resistance is excellent.

Description

Dry powder paint prepared by a kind of fluorgypsum, fluorine white residue and preparation method thereof
Technical field
The present invention relates to the method that dry powder paint is prepared as primary raw material using fluorine chemical sludge fluorgypsum, fluorine white residue, belong to Solid waste integrated treatment utilizes field and new decorative material for building technical field.
Background technology
Fluorgypsum is fluorite (CaF2) and sulfuric acid (H2SO4) produce byproduct during hydrofluoric acid (HF), whole nation fluorination work Industry discharges about 3,000,000 tons of fluorgypsum every year.Wherein 99% above is as cement retarder, producer price is about 50~70 Yuan/ton, it is very cheap, do not play utilization of resources maximizing the benefits.Fluorine white residue is that prodan prepares sodium fluoride with soda ash Accessory substance, is the filter residue after product solution filtering, and its main component is unformed SiO2, content is about between 80%-90%, in vain Degree is more than 95, and fineness is more than 600 mesh, and the overwhelming majority is not utilized, directly outdoor to abandon, not only occupied ground, also to ring Border is affected greatly.
Gypsum material has generally acknowledged light weight, heat-and sound-insulating, insulation and humidity conditioning function.It is of the invention main using fluorgypsum and Fluorine white residue is primary raw material, and a kind of inexpensive, nontoxic, harmless, green and healthy are made, the ecology with micro- breathing, conditioning Functional form dry powder paint.
The content of the invention
It is anti-using the chemistry between inorganic matter it is an object of the invention to provide a kind of fluorgypsum, fluorine white residue primary raw material Higher-strength should be produced, a kind of intensity height, water-tolerant, the Ecotype dry powder with micro- breathing, conditioning is prepared Coating.
The invention provides dry powder paint prepared by a kind of fluorgypsum, fluorine white residue, its each component percentage by weight is：(1) Fluorine gypsum powder 40~60%；(2) fluorine white residue 15-25%；(3) white cement 5~10%；(4) quick lime 5~20%；(5) sulfate Exciting agent 0.5~1%；(6) tackifier 3~8%；(7) lignocellulosic 0.1~0.5%；(8) water-loss reducer 0.1%~0.5%； (9) thixotropic lubricant 0.2~0.5%；(10) dispersant 0.1~0.3%；(11) defoamer 0.1~0.5%.
The requirement of above-mentioned each material is as follows：
Fluorine gypsum powder：The neutralized grinding of dry method fluorgypsum, ageing after again through 450~550 DEG C calcining 2h, natural cooling, in vain Degree >=90, the mesh of fineness >=200；
Fluorine white residue：Dry for 100~150 DEG C and remove moisture；
White cement：Commercially available 42.5 grades of white portland cements or 52.5 grades of white portland cements, whiteness is one-level；
Quick lime：Commercially available quick lime, preferably whiteness >=90, the content of free calcium oxide >=60%；
Sulphate activation agent：Including K2SO4、Na2SO4、KHSO4、NaHSO4、CuSO4、FeSO4、ZnSO4With KAl (SO4)2· 12H2One or more in O, preferably K2SO4；
Tackifier：Mixed including cold soluble type polyvinyl alcohol micro mist (088-50), the one or two kinds of of redispersable latex powder Compound.Preferably cold soluble type polyvinyl alcohol micro mist (088-50), the mesh of fineness >=160；
Water-loss reducer：For methylcellulose (MC), methyl hydroxyethylcellulose ether (MHEC), hydroxypropyl methyl cellulose ether (HPMC) one kind or their mixture in.Preferably hydroxypropyl methyl cellulose ether (HPMC)；
Thixotropic lubricant：For conventional powder thixotropic lubricant, main component is the silicate mineral of sheet.
Dispersant：For conventional powder dispersant, such as sulfonate, carboxylate, ammonium salt, phosphate, preferably hexa metaphosphoric acid Sodium.Defoamer：Conventional antifoam, such as polysiloxanes or polyalcohol defoamer.
In the present invention, the strength of materials is from anhydrous fluorgypsum aquation generation dihydrate gypsum, fluorgypsum and white cement generation CO in entringite, calcium oxide and water and air2The hard CaCO of reaction generation3Three chemical reactions are produced.Fluorgypsum belongs to II type Anhydrite, can acceleration of hydration formation dihydrate gypsum and entringite generation intensity in the presence of suitable exciting agent.In the material Fluorine white residue is introduced, its main component is unformed superfine silicon dioxide, can form silicate in follow-up hybrid reaction Collosol structure, improves materials water-resistant energy.Secondly a small amount of metal fluoride, carbonate and aluminium hydroxide are also contained in fluorine white residue Deng composition, these other a small amount of salts can equally coordinate fluorgypsum and silica produces the effect of Synergistic, for example A small amount of aluminium hydroxide can form a small amount of Edge by Aluminosilicate Sol in subsequent reactions, and metal fluoride and carbonate then can be with Coordinate the mechanical strength for improving gypsum product.Meanwhile, amorphous silica has that whiteness is high, ultra-fine, porous, matter in fluorine white residue Gently, the characteristics of absorption affinity is strong, plays filling increase-volume, thickening delustring, improves coating fineness, surface smoothness and flow leveling, exhales The multiple actions such as absorption energy；Purpose of the invention by introducing white cement：One is the condensation for promoting material, and two are given birth to fluorgypsum Into the entringite of high intensity, three be to improve the mobility of material, and four be to improve the water resistance of material；Quick lime is functioned as Alkaline excitation material, enhancing fluorgypsum further hydration and hardening, while itself and the CO in water and air2Reaction generation is hard CaCO3, improve the intensity and water resistance of material；The effect of sulphate activation agent is aquation and the hardening for promoting fluorgypsum early stage, Shorten setting time；The effect of tackifier is attached between bonding and material and matrix between raising binder materials and filler Put forth effort, while improving material deformation ability, intensity and water resistance；The effect of wood fibre is the water-retaining property and slurry for improving material Stability, prevents face checking；The effect of water-loss reducer is the water retention for improving material；The effect of thixotropic lubricant is to improve material Expect application property, extension open hour and improve material with portion's structural integrity, improve paint stability, sag resistance；Six inclined phosphorus The effect of sour sodium is that fluorgypsum is modified, as dispersant, improves material scatter energy；The effect of defoamer is to material It is modified, reduces material surface tension, eliminates bubble caused by material stirring.
Present invention also offers the preparation method of the fluorgypsum described in a kind of above-mentioned technical proposal, fluorine white residue dry powder paint, Comprise the following steps：
(1) fluorine gypsum powder is prepared by raw material of the fluorgypsum of fluorine chemical enterprise emission, the fluorgypsum is calcium sulphate content Up to more than 90% anhydrous fluorgypsum.The fluorgypsum temperature just discharged, in acidity, is carried out more than 200 DEG C to the fluorgypsum Naturally cooling is stacked, the lime that 0.5wt% is added while input ball mill carries out neutralization modification, and grinding to fineness is 200 sieves Remaining≤5%.After ageing 3 days, 450~550 DEG C of calcining 2h in Muffle furnace are placed in, cooling is taken out.Fluorine white residue is placed in 100 in baking oven Moisture removal is removed in~150 DEG C of dryings, takes out cooling.
(2) fluorine gypsum powder, fluorine white residue powder and the white cement that obtain step (1), quick lime, sulphate activation agent, increase Stick, lignocellulosic, water-loss reducer, thixotropic lubricant, dispersant, defoamer are proportionally added into ball mill, stirring, grinding It is 320 mesh screen residue≤6% to fineness, you can dry powder paint is made.Being added when using after suitable quantity of water fully reconciles to apply.
The technology of the present invention realizes the chemical bond between material using the aquation of fluorgypsum aquation and reinforcing material, has Higher adhesion strength and good water resistance, solve at present rely primarily on binding agent film forming the durable poor water resistance of coating, Easy to crack, peeling technological deficiency.The inventive technique product is dry powder paint, solves solvent based coating discharge organic volatile Defect and water paint packing charges and high freight the problem of, open fluorgypsum, the new way of fluorine white residue comprehensive utilization Footpath, the application of the technology can increase solid waste resource added value, utilization benefit be improved, while will effectively mitigate environmental pressure.
Embodiment
In order to further illustrate the present invention, it is described in detail below by following examples.Following examples of the present invention Fluorgypsum used is the waste residue fluorgypsum of the coloured Hengdong fluorine chemistry Co., Ltd discharge in Hunan；Fluorine white residue used comes from Hunan Coloured Xiangxiang fluorine chemistry Co., Ltd；White cement used is 42.5 grades, from Hebei Qian Bao special cements Co., Ltd；It is used Quick lime come from Series of Shuangfeng Xian, central Hunan county Qing Shuping people from towns and refined lime factory, the content of free calcium oxide >=60%；The technical grade K2SO4There is provided by Shanxi Wen Cheng Chemical Co., Ltd.s.Wood fibre used provides for auspicious Mel father and son company of stepping on of Germany.It is used poly- Vinyl alcohol is 088-50 types, from the three-dimensional group in Shanxi；Redispersable latex powder used is 5044N types, from Wa Ke companies；Institute It is hydroxypropyl methyl cellulose with water-loss reducer, Chemical Co., Ltd. is risen from Shandong one；Thixotropic lubricant used is987, from German Byk Chemie GmbH；The micro- calgon of dispersant used, from that change of Shanghai angstrom Learn Co., Ltd；Defoamer used is RE2971 types, from across the Long Yashilan functional material company in Asia.
Below in conjunction with the embodiment of the present invention, technical scheme is clearly and completely described, it is clear that institute The embodiment of description is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, The every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, belongs to this hair The scope of bright protection.
Embodiment 1
The present embodiment is exemplified by preparing 100kg dry powder paints, and its preparation process is as follows：
(1) the waste residue fluorgypsum discharged using Hunan Nonferrous Fluoride Chemical Group Co., Ltd. prepares fluorine gypsum powder as raw material, institute State the anhydrous fluorgypsum that fluorgypsum is calcium sulphate content up to more than 90%.The fluorgypsum temperature just discharged is more than 200 DEG C, in acid Property, fluorgypsum progress nature is stacked and cooled down, the lime progress neutralization that 0.5wt% is added while input ball mill changes Property, grinding to fineness is tailed over less than 5% for 200.After ageing 3 days, 450-550 DEG C of calcining 2h in Muffle furnace is placed in, cooling is taken out. The waste residue fluorine white residue that Hunan Nonferrous Fluoride Chemical Group Co., Ltd. is discharged is placed in 100-150 DEG C of drying in baking oven and removes moisture removal, Take out cooling.
(2) fluorine gypsum powder, 18.7kg fluorine white residue and the 15kg white cements that obtain 40kg steps (1), 20kg quick limes, The agent of 0.5kg sulphate activations, 5kg tackifier, 0.2kg lignocellulosics, 0.1kg water-loss reducers, 0.2kg thixotropic lubricants, 0.1kg Dispersant, 0.2kg defoamers are added in ball mill, and stirring, grinding to fineness are 320 mesh screen residue≤6%, obtain dry powder painting Material.
Embodiment 2
(1) fluorine gypsum powder is prepared using the waste residue fluorgypsum of the coloured Hengdong fluorine chemistry Co., Ltd discharge in Hunan as raw material, institute State the anhydrous fluorgypsum that fluorgypsum is calcium sulphate content up to more than 90%.The fluorgypsum temperature just discharged is more than 200 DEG C, in acid Property, fluorgypsum progress nature is stacked and cooled down, the lime progress neutralization that 0.5wt% is added while input ball mill changes Property, grinding to fineness is tailed over less than 5% for 200.After ageing 3 days, 450-550 DEG C of calcining 2h in Muffle furnace is placed in, cooling is taken out. The waste residue fluorine white residue that Hunan Nonferrous Fluoride Chemical Group Co., Ltd. is discharged is placed in 100-150 DEG C of drying in baking oven and removes moisture removal, Take out cooling.
(2) fluorine gypsum powder, 25kg fluorine white residue and the 10kg white cements that obtain 48kg steps (1), 7kg quick limes, The agent of 0.9kg sulphate activations, 8kg tackifier, 0.5kg lignocellulosics, 0.1kg water-loss reducers, 0.2kg thixotropic lubricants, 0.1kg Dispersant, 0.2kg defoamers are added in ball mill, and stirring, grinding to fineness are 320 mesh screen residue≤6%, obtain dry powder painting Material.
Embodiment 3
(1) the waste residue fluorgypsum discharged using Hunan Nonferrous Fluoride Chemical Group Co., Ltd. prepares fluorine gypsum powder as raw material, institute State the anhydrous fluorgypsum that fluorgypsum is calcium sulphate content up to more than 90%.The fluorgypsum temperature just discharged is more than 200 DEG C, in acid Property, fluorgypsum progress nature is stacked and cooled down, the lime progress neutralization that 0.5wt% is added while input ball mill changes Property, grinding to fineness is tailed over less than 5% for 200.After ageing 3 days, 450-550 DEG C of calcining 2h in Muffle furnace is placed in, cooling is taken out. The waste residue fluorine white residue that Hunan Nonferrous Fluoride Chemical Group Co., Ltd. is discharged is placed in 100-150 DEG C of drying in baking oven and removes moisture removal, Take out cooling.
(2) fluorine gypsum powder, 15kg fluorine white residue and the 5kg white cements that obtain 60kg steps (1), 14.6kg quick limes, The agent of 1.0kg sulphate activations, 3kg tackifier, 0.2kg lignocellulosics；0.2kg water-loss reducers；0.5kg thixotropic lubricants, 0.2kg Dispersant, 0.3kg defoamers are added in ball mill, and stirring, grinding to fineness are 320 mesh screen residue≤6%, obtain dry powder painting Material.
According to《Exterior wall inorganic architectural coatings》(JG/T26-2002) and《Multi wall architectural coatings》(GB/T9779-2005) Technical indicator and method of testing, carry out application property, surface drying time, washability to obtained dry powder paint in embodiment 1-3 respectively Property, water resistance, alkali resistance, hardness, adhesive force properties test.Its test result is as shown in the table.
The gypsum based dried powder coating the performance test results of table 1
Knowable to above testing result：
Dry powder paint of the present invention has a good application property, stronger adhesive force, water resistance, alkali resistance and washable Brush excellent performance.

Claims (3)

1. dry powder paint prepared by a kind of fluorgypsum, fluorine white residue, it is characterised in that its each component percentage by weight is：(1) fluorite Cream powder 40~60%；(2) fluorine white residue 15-25%；(3) white cement 5~10%；(4) quick lime 5~20%；(5) sulphate activation Agent 0.5~1%；(6) tackifier 3~8%；(7) lignocellulosic 0.1~0.5%；(8) water-loss reducer 0.1%~0.5%；(9) Thixotropic lubricant 0.2~0.5%；(10) dispersant 0.1~0.3%；(11) defoamer 0.1~0.5%.
2. coating according to claim 1, it is characterised in that：
The requirement of each material is as follows：
Fluorine gypsum powder：The neutralized grinding of dry method fluorgypsum, ageing after again through 450~550 DEG C calcining 2h, natural cooling, whiteness >= 90, the mesh of fineness >=200；
Fluorine white residue：Dry for 100~150 DEG C and remove moisture；
White cement：Commercially available 42.5 grades of white portland cements or 52.5 grades of white portland cements, whiteness is one-level；
Quick lime：Commercially available quick lime, preferably whiteness >=90, the content of free calcium oxide >=60%；
Sulphate activation agent：Including K2SO4、Na2SO4、KHSO4、NaHSO4、CuSO4、FeSO4、ZnSO4、KAl(SO4)2·12H2O In one or more；
Tackifier：One or two kinds of mixtures including cold soluble type polyvinyl alcohol micro mist, redispersable latex powder；
Water-loss reducer：For one kind in methylcellulose, methyl hydroxyethylcellulose ether, hydroxypropyl methyl cellulose ether or they Mixture；
Thixotropic lubricant：For conventional powder thixotropic lubricant, main component is the silicate mineral of sheet；
Dispersant：One or more in sulfonate, carboxylate, ammonium salt, phosphate；
Defoamer：Polysiloxanes or polyalcohol defoamer.
3. the preparation method of coating according to claim 1 or 2, it is characterised in that comprise the following steps：
(1) fluorine gypsum powder is prepared by raw material of the fluorgypsum of fluorine chemical enterprise emission, the fluorgypsum reaches for calcium sulphate content More than 90% anhydrous fluorgypsum；The fluorgypsum temperature just discharged, in acidity, is carried out certainly more than 200 DEG C to the fluorgypsum Cooling is so stacked, the lime that 0.5wt% is added while input ball mill carries out neutralization modification, and grinding to fineness tails over for 200 ≤ 5%；After ageing 3 days, 450~550 DEG C of calcining 2h in Muffle furnace are placed in, cooling is taken out；Fluorine white residue is placed in 100 in baking oven~ Moisture removal is removed in 150 DEG C of dryings, takes out cooling；
(2) fluorine gypsum powder, fluorine white residue powder and the white cement that obtain step (1), quick lime, sulphate activation agent, thickening Agent, lignocellulosic, water-loss reducer, thixotropic lubricant, dispersant, defoamer are proportionally added into ball mill, and stirring, grinding are extremely Fineness is 320 mesh screen residue≤6%, you can dry powder paint is made.
CN201710233218.5A 2017-04-11 2017-04-11 Dry powder paint prepared by a kind of fluorgypsum, fluorine white residue and preparation method thereof Pending CN106938909A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10865147B2 (en) * 2017-09-12 2020-12-15 Board Of Supervisors Of Louisiana State University And Agricultural And Mechanical College High strength concrete-like fluorogypsum-based blends and production methods
CN115611545A (en) * 2022-08-22 2023-01-17 贵州天威建材科技有限责任公司 Method for preparing dry powder accelerator from fluorine and silicon residues

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103626410A (en) * 2012-08-27 2014-03-12 湖南有色环保建材有限公司 High-strength waterproof gypsum plaster prepared from waste slag in the fluorine chemical industry and preparation method of the gypsum plaster

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103626410A (en) * 2012-08-27 2014-03-12 湖南有色环保建材有限公司 High-strength waterproof gypsum plaster prepared from waste slag in the fluorine chemical industry and preparation method of the gypsum plaster

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10865147B2 (en) * 2017-09-12 2020-12-15 Board Of Supervisors Of Louisiana State University And Agricultural And Mechanical College High strength concrete-like fluorogypsum-based blends and production methods
US11384019B2 (en) 2017-09-12 2022-07-12 Board Of Supervisors Of Louisiana State University And Agricultural And Mechanical College High-strength concrete-like fluorogypsum-based blends and production method
CN115611545A (en) * 2022-08-22 2023-01-17 贵州天威建材科技有限责任公司 Method for preparing dry powder accelerator from fluorine and silicon residues
CN115611545B (en) * 2022-08-22 2023-12-08 贵州天威建材科技有限责任公司 Method for preparing dry powder accelerator by utilizing fluorosilicone residues

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Application publication date: 20170711