CN108911675A - Using fluorgypsum as the autoclaved lime-sand brick of raw material and its production method - Google Patents
Using fluorgypsum as the autoclaved lime-sand brick of raw material and its production method Download PDFInfo
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- CN108911675A CN108911675A CN201810979371.7A CN201810979371A CN108911675A CN 108911675 A CN108911675 A CN 108911675A CN 201810979371 A CN201810979371 A CN 201810979371A CN 108911675 A CN108911675 A CN 108911675A
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- fluorgypsum
- lime
- sand
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a kind of using fluorgypsum as the autoclaved lime-sand brick of raw material comprising with the following component of weight：79~85 parts of building sand, 7~9 parts of lime, 3~5 parts of active silica, 0.5~1.4 part of tetraethyl orthosilicate, 0.5~1.5 part of Dihydrate gypsum whiskers, 8~14 parts of fluorgypsum.When the present invention introduces fluorgypsum in autoclaved lime-sand brick, alkalinity can be neutralized to by lime, and then fast hydrolyzing is-Si-O-Si skeleton to ethyl orthosilicate under alkaline condition, and it is filled in together with the active silicon dioxide granule of dispersion between fluorgypsum hyrate, gap reinforcing is able to carry out while carrying out chemical strengthening, being aided with Dihydrate gypsum whiskers simultaneously enhances system, therefore can preferably resist expansion bring cracking phenomena.
Description
Technical field
The present invention relates to the field of building materials, and in particular to a kind of using fluorgypsum as the autoclaved lime-sand brick of raw material.
Background technique
Autoclaved lime-sand brick is using flyash or other industrial residues as raw material, instead through feedstock processing, ingredient stirring, ageing
It answers, compression moulding, steam press maintenance, pile warehousing process are made.Autoclaved lime-sand brick complete set of equipments includes：Milling apparatus, blender,
It is aged the environmentally friendly ancillary equipment of the capital equipments and dust-extraction unit, hot and cold water circulating water pool etc. such as facility, brick machine, still kettle.Steam pressure
The multinomial performances such as frost resistance, corrosion resistance, the compression strength of Dinas brickes are better than the artificial stone material of solid clay brick.The specification ruler of brick
It is very little completely the same with solid plain clay brick, it is 240mm x 115mm x 53mm, so can direct generation with autoclaved lime-sand brick
For solid clay brick.It is the novel wall material that country greatly develops, applies.
Currently, industrial solid castoff is used to prepare construction material as a kind of trend for raw material, can save a large amount of
Cultivated land resource, and industrial solid castoff can be made effectively to be recycled, it is to kill two birds with one stone.It is domestic at present to be built for making
Building with the industrial solid castoff of brick is mainly gangue, flyash, the bed mud generated in During Industrial Wastewater Treatment Process and various
Tailing (such as gypsum mine, pyrite slag, copper tailing, tailings of high silicon iron, asbestos tailings), although its preparation process has been achieved with
Biggish progress, and be widely used in building trade.
Wherein, fluorgypsum is that fluorination saltworks produces the byproduct after hydrofluoric acid using fluorite and the concentrated sulfuric acid.Fluorgypsum is from anti-
It answers when being discharged in furnace, material temperature is 180 DEG C~230 DEG C, and fuel gas temperature is 800 DEG C~1000 DEG C, and the gypsum of discharge is anhydrous slufuric acid
Calcium, under conditions of having abundant water, calcium sulphate dihydrate can be substantially transitioned to by stacking 3 months or so.In the fluorgypsum of discharge, often
With unreacted CaF2 and H2SO4, H2SO4 content is very high sometimes, makes the fluorgypsum of discharge in acidity, cannot directly throw aside.
To this China, generally there are two types for the treatment of methods:1) the gypsum of fresh baked is added water to be beaten by lime neutralisation, investment lime neutralizes
It is discharged when to pH=7 or so.The lime neutralisation of sulphuric acid of addition, further generates calcium sulfate.When adding lime, a small amount of Ca is only brought into
(OH) 2, therefore, using this processing method, the purity of fluorgypsum is higher, and wherein gypsum content is up to 80%~95%, and contains
There are fluorite and SiO2, referred to as lime-fluorgypsum.2) bauxite neutralisation, i.e., in addition bauxite and remaining sulfuric acid is recyclable
Useful product aluminum sulfate, keeps its slightly acidic, then plus lime be neutralized to pH=7, be then discharged out stacking.Contain 40% in bauxite
The SiO2 and other impurities of left and right, make the grade for the fluorgypsum being finally discharged drop to 70%~80%, this gypsum is known as aluminium
Soil-fluorgypsum.
Fluorgypsum can be used as retarder, sulfated slag cement and mineralizer of various cement etc., and this respect technology is
The important feature of comparative maturity fluorgypsum is chemical composition stability, and SO3 content is high, so as to produce the cement of high quality.Fluorite
Cream is as mineralizer, other than it can reduce firing temperature, can also reduce the volatility of alkali in material, avoid fault in production
And environmental pollution.In above-mentioned application, fluorgypsum is used as additive to carry out using content limits fluorine less than 1%
The processing of gypsum utilizes, and is not able to satisfy the process demand that fluorine industry is more than annual millions of tons much also at present.
But fluorgypsum holds in later period use as a kind of industrial residue since condensation is slow, intensity is low, expansion is serious
It is easy to crack, the dimensional discrepancy and mechanical strength of product are influenced, existing national standards are unable to satisfy, thus cannot be directly as building
Materials'use.
Summary of the invention
To solve the above problems, this invention address that provide it is a kind of using fluorgypsum as the autoclaved lime-sand brick of raw material so that its
Certain force intensity requirement and dimensional discrepancy are also able to satisfy while using more fluorgypsum.
The invention discloses a kind of using fluorgypsum as the autoclaved lime-sand brick of raw material comprising with following group of weight
Point：79~85 parts of building sand, 7~9 parts of lime, 3~5 parts of active silica, 0.5~1.4 part of tetraethyl orthosilicate, two water
0.5~1.5 part of calcium sulfate crystal whiskers, 8~14 parts of fluorgypsum.
Preferably, described by the autoclaved lime-sand brick of raw material of fluorgypsum includes following component with weight：It builds
It builds with 85 parts of sand, 8 parts of lime, 3 parts of active silica, 0.5 part of tetraethyl orthosilicate, 1 part of Dihydrate gypsum whiskers, fluorgypsum
11 parts.
Preferably, described by the autoclaved lime-sand brick of raw material of fluorgypsum includes following component with weight：It builds
It builds with 83 parts of sand, 7 parts of lime, 5 parts of active silica, 1.4 parts of tetraethyl orthosilicate, 0.5 part of Dihydrate gypsum whiskers, fluorite
8 parts of cream.
Preferably, described by the autoclaved lime-sand brick of raw material of fluorgypsum includes following component with weight：It builds
It builds with 79 parts of sand, 9 parts of lime, 4 parts of active silica, 0.8 part of tetraethyl orthosilicate, 1.5 parts of Dihydrate gypsum whiskers, fluorite
14 parts of cream.
The present invention also provides a kind of production methods of autoclaved lime-sand brick：The raw material of said ratio is stirred evenly and
Standing 40~after sixty minutes, it is heated and is warming up to 40~65 DEG C, in still kettle after compression moulding under 30~35MPa pressure
Middle steam press maintenance.
When the present invention introduces fluorgypsum in autoclaved lime-sand brick, alkalinity, and then ethyl orthosilicate can be neutralized to by lime
Fast hydrolyzing is-Si-O-Si skeleton under alkaline condition, and fluorgypsum is filled in together with the active silicon dioxide granule of dispersion
Between hyrate, gap reinforcing is able to carry out while carrying out chemical strengthening, while being aided with Dihydrate gypsum whiskers to system
Enhanced, therefore can preferably resist expansion bring cracking phenomena.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this
Invention is described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.
Embodiment 1：
The autoclaved lime-sand brick of the present embodiment comprising：85 parts of building sand, 8 parts of lime, 3 parts of active silica, positive silicon
0.5 part of sour tetra-ethyl ester, 1 part of Dihydrate gypsum whiskers, 11 parts of fluorgypsum.
Embodiment 2：
The autoclaved lime-sand brick of the present embodiment comprising：83 parts of building sand, 7 parts of lime, 5 parts of active silica, positive silicon
1.4 parts of sour tetra-ethyl ester, 0.5 part of Dihydrate gypsum whiskers, 8 parts of fluorgypsum.
Embodiment 3：
The autoclaved lime-sand brick of the present embodiment comprising：79 parts of building sand, 9 parts of lime, 4 parts of active silica, positive silicon
0.8 part of sour tetra-ethyl ester, 1.5 parts of Dihydrate gypsum whiskers, 14 parts of fluorgypsum.
Comparative example 1：
The autoclaved lime-sand brick of the present embodiment comprising：83 parts of building sand, 7 parts of lime, 5 parts of active silica, positive silicon
1.4 parts of sour tetra-ethyl ester, 8 parts of fluorgypsum.
Comparative example 2：
The autoclaved lime-sand brick of the present embodiment comprising：83 parts of building sand, 7 parts of lime, 5 parts of active silica, two water
0.5 part of calcium sulfate crystal whiskers, 8 parts of fluorgypsum.
Production method:The raw material of said ratio is stirred evenly and stand 40~after sixty minutes, it is heated and is warming up to 40
~65 DEG C, after compression moulding under 30~35MPa pressure in still kettle steam press maintenance, wherein steam press maintenance includes vacuum
Stage (continuing 0.4~0.6h under 0~0.06MPa), boost phase (gradually boosting to 1.2MPa through 1~2h), constant temperature and pressure rank
Section (1.20MPa, 170~185 DEG C at continue 4~5h) and buck stage (being gradually depressurized to normal pressure through 1~2h).
Wherein, above-mentioned building sand should preferably meet GB/T14684 national standard.Above-mentioned fluorgypsum preferably selects lime-
Fluorgypsum.Above-mentioned active silica specific surface area is 200~300m2/g。
Above-mentioned Dihydrate gypsum whiskers are purchased from Hubei Woyu New Material Technology Co., Ltd., and physical and chemical parameter is：Bai Du≤
95%, degree of purity >=99.26%, Shui Fen≤10%, fineness：80-120 mesh, loose density 0.5g/cm3, draw ratio 40~80.
In the various embodiments described above, the mass parameter of product is as shown in the table：
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 | |
| Length average-size deviation/mm | 1.63 | 1.04 | 1.80 | 3.22 | 4.08 |
| Width average-size deviation/mm | 0.85 | 0.66 | 1.02 | 2.03 | 1.95 |
| Height average-size deviation/mm | 0.59 | 0.42 | 0.62 | 1.25 | 1.30 |
| Mean compressive strength/MPa | 10.5 | 15.6 | 13.3 | 7.8 | 13.6 |
| Minimum compression strength/MPa | 8.7 | 13.1 | 10.0 | 5.8 | 11.4 |
| Average flexural strength/MPa | 3.1 | 4.5 | 4.1 | 3.3 | 4.8 |
| Minimum flexural strength/MPa | 2.4 | 2.8 | 2.5 | 2.2 | 2.7 |
1~embodiment of embodiment 3 can better meet in GB11945-1999 and close it can be seen from above-mentioned experimental data
In the requirement of dimensional discrepancy and MU10 strength grade, wherein embodiment 2 can also meet MU15 strength grade and reach high-class product
Rank.Beyond range perhaps is filled, mean compressive strength and minimum flexural strength are not able to satisfy the length average-size deviation of comparative example 1
Minimum requirement.And the mechanical strength performance of comparative example 2 is preferable, but length average-size deviation is excessive.
Technical effect of the invention：When the present invention introduces fluorgypsum in autoclaved lime-sand brick, alkali can be neutralized to by lime
Property, and then fast hydrolyzing is-Si-O-Si skeleton, and the active silica with dispersion to ethyl orthosilicate under alkaline condition
Grain is filled in together between fluorgypsum hyrate, gap reinforcing is able to carry out while carrying out chemical strengthening, while being aided with two
H 2 O calcium sulphate whisker enhances system, therefore can preferably resist expansion bring cracking phenomena.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those skilled in the art,
, can also be to several modifications and improvements to be made without departing from the spirit of the invention, these modification and improvement should all be received
Enter protection scope of the present invention.
Claims (5)
1. a kind of using fluorgypsum as the autoclaved lime-sand brick of raw material, which is characterized in that including with the following component of weight：It builds
It builds with 79~85 parts of sand, 7~9 parts of lime, 3~5 parts of active silica, 0.5~1.4 part of tetraethyl orthosilicate, sulfate dihydrate
0.5~1.5 part of calcium pyroborate, 8~14 parts of fluorgypsum.
2. as described in claim 1 using fluorgypsum as the autoclaved lime-sand brick of raw material, which is characterized in that including with weight
Following component：85 parts of building sand, 8 parts of lime, 3 parts of active silica, 0.5 part of tetraethyl orthosilicate, calcium sulphate dihydrate
1 part of whisker, 11 parts of fluorgypsum.
3. as described in claim 1 using fluorgypsum as the autoclaved lime-sand brick of raw material, which is characterized in that including with weight
Following component：83 parts of building sand, 7 parts of lime, 5 parts of active silica, 1.4 parts of tetraethyl orthosilicate, calcium sulphate dihydrate
0.5 part of whisker, 8 parts of fluorgypsum.
4. as described in claim 1 using fluorgypsum as the autoclaved lime-sand brick of raw material, which is characterized in that including with weight
Following component：79 parts of building sand, 9 parts of lime, 4 parts of active silica, 0.8 part of tetraethyl orthosilicate, calcium sulphate dihydrate
1.5 parts of whisker, 14 parts of fluorgypsum.
5. the production method of autoclaved lime-sand brick as described in any one of Claims 1 to 4, which is characterized in that by said ratio
Raw material stir evenly and stands 40~after sixty minutes, it is heated and is warming up to 40~65 DEG C, suppressed under 30~35MPa pressure
After molding in still kettle steam press maintenance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810979371.7A CN108911675B (en) | 2018-08-22 | 2018-08-22 | Autoclaved sand-lime brick taking fluorgypsum as raw material and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810979371.7A CN108911675B (en) | 2018-08-22 | 2018-08-22 | Autoclaved sand-lime brick taking fluorgypsum as raw material and production method thereof |
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| Publication Number | Publication Date |
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| CN108911675A true CN108911675A (en) | 2018-11-30 |
| CN108911675B CN108911675B (en) | 2020-11-24 |
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| CN201810979371.7A Active CN108911675B (en) | 2018-08-22 | 2018-08-22 | Autoclaved sand-lime brick taking fluorgypsum as raw material and production method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104803651A (en) * | 2015-04-28 | 2015-07-29 | 铜陵海源超微粉体有限公司 | Gypsum-based cementing material |
| CN105541257A (en) * | 2016-01-29 | 2016-05-04 | 济南大学 | Fluorgypsum based floor tile and preparation method thereof |
| CN106747174A (en) * | 2016-11-21 | 2017-05-31 | 同济大学 | Water-resistant type air-entrained concrete building block prepared by a kind of utilization ardealite hydraulicity composite gel material |
-
2018
- 2018-08-22 CN CN201810979371.7A patent/CN108911675B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104803651A (en) * | 2015-04-28 | 2015-07-29 | 铜陵海源超微粉体有限公司 | Gypsum-based cementing material |
| CN105541257A (en) * | 2016-01-29 | 2016-05-04 | 济南大学 | Fluorgypsum based floor tile and preparation method thereof |
| CN106747174A (en) * | 2016-11-21 | 2017-05-31 | 同济大学 | Water-resistant type air-entrained concrete building block prepared by a kind of utilization ardealite hydraulicity composite gel material |
Non-Patent Citations (1)
| Title |
|---|
| 黄玉媛: "《精细化工配方常用原料手册》", 31 March 1998, 广东科技出版社 * |
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