CN104844136A - Method used for preparing light calcium silicate boards from waste silica fume - Google Patents
Method used for preparing light calcium silicate boards from waste silica fume Download PDFInfo
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- CN104844136A CN104844136A CN201510173358.9A CN201510173358A CN104844136A CN 104844136 A CN104844136 A CN 104844136A CN 201510173358 A CN201510173358 A CN 201510173358A CN 104844136 A CN104844136 A CN 104844136A
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- CN
- China
- Prior art keywords
- silica fume
- calcium silicate
- light calcium
- discarded
- silicate plate
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- 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
Abstract
The invention provides a method used for preparing light calcium silicate boards from waste silica fume, production cost of calcium silicate boards is reduced, and both economic benefits and social benefits are achieved. The method comprises following steps: A, silica fume collected from different ferroalloy plants is subjected to component analysis, and mixing and combination are carried out based on analysis indexes so that indexes of silica fume obtained via mixing and combination are capable of satisfying production requirements; B, full decomposition of composite fiber is realized using a pulping machine, a thickening agent is dissolved in water so as to obtain an aqueous solution, decomposed fiber and the thickening agent aqueous solution are added into pulping water, an obtained mixed material is stirred to be uniform, weighed silica fume, quartz sand, slaked lime, cement, and coal ash microsphere are added, and a slurry needed by calcium silicate board production is prepared using a mixinghollander, wherein the coal ash microsphere is obtained via pre-wetted treatment; and C, the slurry is subjected to board preparation machine moulding, pressurization, maintenance and sizing, high pressure steaming, drying, sanding, and the like so as to obtain the light calcium silicate boards.
Description
Technical field
The invention belongs to building and ornament materials production technical field, be specifically related to the production technology of light calcium silicate plate.
Background technology
SILICA FUME is in ferrosilicon or silicon metal smelting process, the tiny spherical noncrystal SiO2 microballon of formation, is now widely used in the fields such as building, fire-resistant, chemical industry.At present, being defined as SiO2 content to the application standard of SILICA FUME is not less than 85% both at home and abroad, and the SILICA FUME SiO2 content that NORTHWEST CHINA area iron alloy enterprise reclaims is mostly at about 75-82%, do not reach use standard, cause that a large amount of low-grade SILICA FUME cannot process, the phenomenon of contaminate environment, to enterprise with locally bring huge financial loss and environmental stress.
Due to raw-material restriction, the unit weight > 1.3 of current domestic calcium silicate board, seriously limit its applicable situation, if low-grade SILICA FUME can be utilized to produce light calcium silicate plate, will while reduction calcium silicate board production cost, the waste residue of a large amount of process iron alloy enterprise, realizes the doulbe-sides' victory of economic benefit, energy-conserving and environment-protective.
Summary of the invention
The object of the invention is to propose a kind of method utilizing discarded SILICA FUME to produce light calcium silicate plate, to reduce the production cost of calcium silicate board, realize the doulbe-sides' victory of economic benefit and social benefit.
The method that SILICA FUME production light calcium silicate plate is discarded in utilization of the present invention comprises the steps:
A: carry out composition analysis to from the SILICA FUME collected by different ferroalloy works, carries out mixing according to analysis indexes composite, make composite after SILICA FUME index reach production requirement;
B: conjugated fibre is fully decomposed through paste roller mill, simultaneously by water-soluble for thickening material one-tenth aqua, fiber after decomposition and thickening material aqua are added in slurrying water, stir, add the SILICA FUME, quartz sand, slaked lime, cement, the fly ash micro-sphere that measure, make calcium silicate board by mixing hollander and produce required slurry; Described fly ash micro-sphere is through pre-wetted treatment;
C: slurry is passed through laminator shaping, then makes light calcium silicate plate after pressurization, maintenance sizing, pressure steaming, oven dry, sanding step.
At present, the SILICA FUME reclaimed from iron alloy enterprise is generally made up of (weight percent) following component: SiO
2: 73-82, Al
2o
3: 0.21-0.58, CaO: 1.0-1.6, K
2o+MgO: 2.1-3.5, Fe
2o
3: 1.5-3.5, C: 1.5-6.According to research, the impact that the impurity in SILICA FUME is produced calcium silicate board is as follows:
1, the existence of C element, can have influence on the fire resistance of the finished product, but can improve the moisture adsorption and releasing parameter of product, and proportional amount should control below 7.At pretreatment stage by secondary clacining and specific-gravity winnowing, the C content in raw material is controlled below 7.
2, Al
2o
3existence, tobermorite sheet structure stability can be made to strengthen, thus suppress to the transformation of xonotlite, proportional amount should control below 0.35.
3, K
2the existence of O, can promote xonotlite primary particle crystalline growth, increases offspring diameter, but the excessive formation that will suppress xonotlite, proportional amount controls below 1.8.
4, the existence of MgO, can suppress xonotlite primary particle crystalline growth, do not have promoter action to offspring balling, proportional amount controls below 1.8.
5, Fe
2o
3existence, the chemical reaction in producing calcium silicate board does not exist substantially, and the physical properties impact on calcium silicate board product of the content of 4-5% is little, can be calculated into weight of gathering materials, and as gathering materials, element uses, and proportional amount controls below 7.
6, the existence of CaO, can not affect the chemical reaction in calcium silicate board production, but as the main raw material in reaction, at the consumption of subsequent production center deflate lime.
In sum, can by ultimate analysis in early stage, to the SILICA FUME of different iron alloy enterprise classify (because each enterprise raw material and production technique basicly stable, to produce SILICA FUME impurity rangeability little, take the way of every 50 ton of one chemical examination, control the classification of each factory product).Then, according to detection data, by conputer controlled high efficient mixed, proportioning goes out to meet produces SILICA FUME that is required, stay in grade.
Specifically, in described step A, the SILICA FUME index after composite meets following production requirement: the weight content ratio of carbon is less than 7%, Al
2o
3weight content ratio be less than 0.35%, K
2the weight content ratio that the weight content ratio of O is less than 1.8%, MgO is less than 1.8%, Fe
2o
3weight content ratio be less than 7%.
In described step B, the weight percent of various composition is as follows: the SILICA FUME after composite: 25--35%; Silica powder: 10-20%, wherein SiO
2content>=99%; Slaked lime: 10-35%, wherein content>=67% of CaO; Cement: 12-38%; Conjugated fibre: 5-12%; Thickening material: 0.1-0.3%; Fly ash micro-sphere: 8-12%.
Described conjugated fibre is composited by the needle-leaved wood fibre of 98% and the carbon fiber of 2%; The label of described cement is P.O42.5; Described thickening material is Xylo-Mucine.
Further, in described step C, pressure steaming step is as follows: blank stereotyped for maintenance is sent into autoclave steam press maintenance, vapor pressure: 1.5 ~ 2.8MPa, steam curing temperature 180 ~ 2100c, the steam-cured time: 6 ~ 30 hours, to improve intensity and the nail-holding ability of product further, and prevent from occurring layering and crack phenomenon in steam-cured process with pressure.
Baking step is as follows: the steamed blank of pressure is entered warehouse for drying and dries, bake out temperature 90 ~ 1800c, drying time 30 ~ 120 minutes, makes the water content of drying rear blank be less than 5%.
The present invention is by carrying out grade segmentation to low-grade SILICA FUME, secondary joins level, form satisfactory SILICA FUME, by using the active SILICA FUME of amorphousness in a large number, improve the reaction ratio of various raw material in production, in process of production through High Temperature High Pressure hydration step, SILICA FUME after joining level and slaked lime are fully reacted, after being strengthened by fiber again, produce the wallboard being applicable to Discussion on architecture body of wall, the decoration substrate of decorative sheet and the light calcium silicate plate of environmental protection furniture substrate, the unit weight of this kind of light calcium silicate plate is between 0.5 ~ 1.0, there is lightweight, intensity is high, fracture resistance is good, nail-holding ability is strong, fire-proof and water-proof performance is good, advantage easy to process, while reduction production cost, the waste residue of iron alloy enterprise can be processed in a large number, achieve economic benefit, the doulbe-sides' victory of energy-conserving and environment-protective social benefit.
Embodiment
Below by the description to embodiment, the effect and principle of work etc. of the specific embodiment of the present invention as the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part are described in further detail.
Embodiment 1:
In the present embodiment, it is composite that the SILICA FUME that have employed A, B, C tri-iron alloy enterprises carries out mixing, obtains the SILICA FUME that index meets production requirement, wherein:
A factory: the SILICA FUME produced smelted by 72# ferro-silicon, following (weight percent): the SiO of composition
2: 78.83, Al
2o
3: 0.41, CaO: 1.93, K
2o: 2.87, MgO: 2.81, Fe
2o
3: 5.98, C: 4.52.
B factory: the SILICA FUME produced smelted by Rhometal, following (weight percent): the SiO of composition
2: 80.38, Al
2o
3: 0.58, CaO: 1.89, K
2o: 1.07, MgO: 1.42, Fe
2o
3: 3.74, C: 2.31.
C factory: the SILICA FUME that low titanium ferro-silicon alloy smelting produces, following (weight percent): the SiO of composition
2: 82.38, Al
2o
3: 0.19, CaO: 2.08, K
2o: 1.17, MgO: 1.12, Fe
2o
3: 3.18, C: 3.39.
The SILICA FUME blending ratio of above-mentioned three producers is as follows: A: B: C=1: 1: 2.
Hybrid mode: mandatory stirring.
Mixing time: 25 ~ 45 minutes.
The SILICA FUME composition obtained after composite is as follows: SiO
2: 80.98, Al
2o
3: 0.34, CaO: 1.99, K
2o: 1.57, MgO: 1.62, Fe
2o
3: 4.02, C: 3.46, Na
2o: 1.83.
Utilize above-mentioned composite after SILICA FUME as follows to the method for producing light calcium silicate plate:
Raw materials for production are filled a prescription: composite SILICA FUME: 200KG; Silica powder: 200KG; Slaked lime: 300KG; Cement: 120KG; Conjugated fibre: 80KG; Thickening material: 2KG; Fly ash micro-sphere: 100KG.
Production stage:
1, thickener preparation: added by thickening material in hot water (70-90 DEG C), makes aqua through stirring;
2, conjugated fibre is loosened: by conjugated fibre through paste roller mill, makes water slurry body;
3, pulping water preparation: water slurry body is added thickening material aqua, stirs 3-10 second;
4, fly ash micro-sphere is prewetted, product can be prevented in maintenance, press in steamed journey and occur layering and crackle;
5, slurry preparation (stir, gel): by SILICA FUME, silica powder, slaked lime, cement, the fly ash micro-sphere of prewetting adds mixing hollander and pulping water and conjugated fibre of loosening mixes, churning time: 60 ~ 240 minutes, alr mode: 100 ~ 400 revs/min;
6, making sheet: slurry enters cylinder mould by head box and copies and get, through vacuum filtration, extrusion forming;
7, precuring: the blank be shaped is sent into precuring storehouse and carries out maintenance;
8, steam press maintenance: the blank that precuring is good enters autoclave steam press maintenance, vapor pressure: 1.5 ~ 2.8MPa, steam curing temperature 180 ~ 2100c, steam-cured time: 6 ~ 30 hours;
9, dry: steam-cured good blank is entered warehouse for drying and dry, bake out temperature 90 ~ 1800c, drying time 30 ~ 120 minutes, makes the water content of drying rear blank be less than 5%;
10, cut: blank after oven dry is carried out secondary and cuts;
11, fixed thick sanding: the blank cut is carried out surely thick and front surface sanding;
12, check: the flaws such as inspection product flawless, hole, unfilled corner;
13, finished product warehouse-in: finished product warehouse-in packaging.
Embodiment 2:
The composite SILICA FUME that the present embodiment adopts embodiment 1 to obtain is to produce light calcium silicate plate, specific as follows:
Raw materials for production are filled a prescription:
Composite SILICA FUME: 300KG; Silica powder: 120KG; Slaked lime: 300KG; Cement: 120KG; Conjugated fibre: 80KG; Thickening material: 2KG; Fly ash micro-sphere: 100KG.
Production stage is identical with embodiment 1, repeats no more herein.
Embodiment 3:
The composite SILICA FUME that the present embodiment adopts embodiment 1 to obtain is to produce light calcium silicate plate, specific as follows:
Raw materials for production are filled a prescription:
Composite SILICA FUME: 350KG; Silica powder: 50KG; Slaked lime: 300KG; Cement: 120KG; Conjugated fibre: 80KG; Thickening material: 2KG; Fly ash micro-sphere: 100KG.
Production stage is identical with embodiment 1, repeats no more herein.
The detection data of three embodiment products are as following table:
| Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Thickness | 0.8 | 0.8 | 0.8 |
| Density | 0.75 | 0.68 | 0.59 |
| Water ratio | 4.8 | 5 | 4.9 |
| The wet rate that rises | 0.23 | 0.23 | 0.21 |
| Heat-shrinkable | 0.42 | 0.39 | 0.41 |
| Folding strength | 11.3 | 12 | 11.7 |
| Layering, crackle | Nothing | Nothing | Nothing |
Claims (8)
1. utilize discarded SILICA FUME to produce a method for light calcium silicate plate, it is characterized in that comprising the steps:
A: carry out composition analysis to from the SILICA FUME collected by different ferroalloy works, carries out mixing according to analysis indexes composite, make composite after SILICA FUME index reach production requirement;
B: conjugated fibre is fully decomposed through paste roller mill, simultaneously by water-soluble for thickening material one-tenth aqua, fiber after decomposition and thickening material aqua are added in slurrying water, stir, add the SILICA FUME, quartz sand, slaked lime, cement, the fly ash micro-sphere that measure, make calcium silicate board by mixing hollander and produce required slurry; Described fly ash micro-sphere is through pre-wetted treatment;
C: slurry is passed through laminator shaping, then makes light calcium silicate plate after pressurization, maintenance sizing, pressure steaming, oven dry, sanding step.
2. the method that SILICA FUME produces light calcium silicate plate is discarded in utilization according to claim 1, and it is characterized in that in described step A, the weight content ratio that the SILICA FUME index after composite meets following production requirement carbon is less than 7%, Al
2o
3weight content ratio be less than 0.35%, K
2the weight content ratio that the weight content ratio of O is less than 1.8%, MgO is less than 1.8%, Fe
2o
3weight content ratio be less than 7%.
3. the method that SILICA FUME produces light calcium silicate plate is discarded in utilization according to claim 1 and 2, it is characterized in that in described step B, the weight percent of various composition is as follows: the SILICA FUME after composite: 25--35%; Silica powder: 10-20%, wherein SiO
2content>=99%; Slaked lime: 10-35%, wherein content>=67% of CaO; Cement: 12-38%; Conjugated fibre: 5-12%; Thickening material: 0.1-0.3%; Fly ash micro-sphere: 8-12%.
4. the method that SILICA FUME produces light calcium silicate plate is discarded in utilization according to claim 3, it is characterized in that described conjugated fibre is composited by the needle-leaved wood fibre of 98% and the carbon fiber of 2%.
5. the method that SILICA FUME produces light calcium silicate plate is discarded in utilization according to claim 3, it is characterized in that the label of described cement is P.O42.5.
6. the method that SILICA FUME produces light calcium silicate plate is discarded in utilization according to claim 3, it is characterized in that described thickening material is Xylo-Mucine.
7. the method that SILICA FUME produces light calcium silicate plate is discarded in utilization according to claim 1, it is characterized in that in described step C, pressure steaming step is as follows: blank stereotyped for maintenance is sent into autoclave steam press maintenance, vapor pressure: 1.5 ~ 2.8MPa, steam curing temperature 180 ~ 2100c, the steam-cured time: 6 ~ 30 hours.
8. the method that SILICA FUME produces light calcium silicate plate is discarded in utilization according to claim 1, it is characterized in that in described step C, baking step is as follows: the steamed blank of pressure is entered warehouse for drying and dries, bake out temperature 90 ~ 1800c, drying time 30 ~ 120 minutes, makes the water content of drying rear blank be less than 5%.
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|---|---|---|---|
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| CN201510173358.9A CN104844136A (en) | 2015-04-14 | 2015-04-14 | Method used for preparing light calcium silicate boards from waste silica fume |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106426545A (en) * | 2016-08-29 | 2017-02-22 | 台荣建材(湖州)有限公司 | Production system for calcium silicate plate |
| CN114057457A (en) * | 2021-11-19 | 2022-02-18 | 甘肃诺尔达工贸有限公司 | Process for preparing calcium silicate board by using residue of aluminum extraction from fly ash |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1408671A (en) * | 2002-10-11 | 2003-04-09 | 莱州祥云防火隔热材料有限公司 | Process for producing high temperature resistant, high strength and high density calcium silicate plate |
| CN102584116A (en) * | 2011-12-14 | 2012-07-18 | 台荣建材(湖州)有限公司 | Asbestos-free light calcium silicate board and manufacturing method thereof |
| CN103449773A (en) * | 2013-08-14 | 2013-12-18 | 武汉建筑材料工业设计研究院有限公司 | Light-weight calcium silicate plate and preparation method thereof |
-
2015
- 2015-04-14 CN CN201510173358.9A patent/CN104844136A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1408671A (en) * | 2002-10-11 | 2003-04-09 | 莱州祥云防火隔热材料有限公司 | Process for producing high temperature resistant, high strength and high density calcium silicate plate |
| CN102584116A (en) * | 2011-12-14 | 2012-07-18 | 台荣建材(湖州)有限公司 | Asbestos-free light calcium silicate board and manufacturing method thereof |
| CN103449773A (en) * | 2013-08-14 | 2013-12-18 | 武汉建筑材料工业设计研究院有限公司 | Light-weight calcium silicate plate and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 中华人民共和国国家质量监督检验检疫总局等: "《中华人民共和国国家标准 GB/T 21236-2007 电炉回收二氧化硅微粉》", 1 April 2008 * |
| 冯铭等: "浅谈硅酸钙板的生产与应用", 《新型建筑材料》 * |
| 王玉平等: "纤维水镁石增强硅酸钙板的研究", 《新型建筑材料》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106426545A (en) * | 2016-08-29 | 2017-02-22 | 台荣建材(湖州)有限公司 | Production system for calcium silicate plate |
| CN114057457A (en) * | 2021-11-19 | 2022-02-18 | 甘肃诺尔达工贸有限公司 | Process for preparing calcium silicate board by using residue of aluminum extraction from fly ash |
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Effective date of abandoning: 20180928 |