CN1233585C - Method for preparing phosphogypsum baked brick - Google Patents

Method for preparing phosphogypsum baked brick Download PDF

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Publication number
CN1233585C
CN1233585C CNB021131848A CN02113184A CN1233585C CN 1233585 C CN1233585 C CN 1233585C CN B021131848 A CNB021131848 A CN B021131848A CN 02113184 A CN02113184 A CN 02113184A CN 1233585 C CN1233585 C CN 1233585C
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CN
China
Prior art keywords
phosphogypsum
catalysis
toughener
brick
present
Prior art date
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Expired - Fee Related
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CNB021131848A
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Chinese (zh)
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CN1465540A (en
Inventor
胡成军
潘建
叶丽君
崔应虎
罗自力
汪全军
王勤
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TONGLING CHEMICAL INDUSTRY GROUP Co Ltd
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TONGLING CHEMICAL INDUSTRY GROUP Co Ltd
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Priority to CNB021131848A priority Critical patent/CN1233585C/en
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Publication of CN1233585C publication Critical patent/CN1233585C/en
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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

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  • Compositions Of Oxide Ceramics (AREA)

Abstract

The present invention discloses a method for preparing a clinker brick by using phosphogypsum as raw material. The present invention comprises the components by weight ratio: 1 share of phosphogypsum, 0.39 to 2.2 shares of shaping adhesive stuff, 0 to 0.66 share of internal fuel and 0.06 to 0.26 share of catalysis reinforcing agent, and the components are fully and uniformly mixed; the mixture is shaped, aired, and fired under the condition of 700 to 900 DEG C for 30 to 55 hours; the catalysis reinforcing agent is a compound containing iron. The method disclosed by the present invention for preparing the phosphogypsum clinker brick can obviously enhance the strength of a product under the condition of the same clay consumption with that of the prior art; consequently, the purpose for increasing phosphogypsum dosage and reducing clay dosage is reached. The present invention overcomes the defects in the prior art of larger clay consumption or complicated process, long blank airing time, difficult green brick shaping, easy strain cracking during firing, high cost of the used addition agent and low strength of pressure resistance.

Description

The preparation method of ardealite baked brick
Technical field
The claimed technical scheme of the present invention belongs to utilizes phosphogypsum to be this technical field of feedstock production vitrified brick.
Background technology
Produced a large amount of phosphogypsum slags in multiple fertile production of phosphorus on the one hand, not only needed a large amount of stockyards, but also be easy to generate pollution; On the other hand, for protecting farmland, need restriction to use clay brick.Therefore utilizing phosphogypsum waste material substitute for clay to produce vitrified brick is a kind of technical scheme that can solve above-mentioned contradiction simultaneously.People have made a lot of researchs for this reason, and application number is that to disclose various respectively be the scheme of feedstock production vitrified brick with the phosphogypsum for 97103894.5,98111863.1,01107871.5 Chinese patent.97103894.5 each composition and weight percent are in the disclosed prescription: phosphogypsum 35-45%, clay 40-60%, interior fuel 8-20%, technology is after 120 ℃ of dryings, again in 850-950 ℃ of sinter molding.98111863.1 disclosed scheme is: utilize weight percent to be the 55-65% phosphogypsum, 35-45% shale, Huangshi sand and coal gangue, through after twice stirring 700-900 ℃ of sintering temperature 48-50 hour moulding.01107871.5 each composition weight percent of disclosed prescription is in the patent application: phosphogypsum 45-65%, clay, shale or yellow spoil 35-55%, interior coal-fired 0-8%, after the above mixing of materials 700-800 ℃ of sintering temperature 36-48 hour moulding.More than each scheme all exist one of following defective: or the clay consumption is bigger, or complex process, base time of drying in the air is long, the green brick forming difficulty is fired yielding cracking, additive therefor cost height, or intensity is generally below 7.5MPa, can only do the enclosure wall building block, can not do the bearing wall building block, range of application is limited to.
Summary of the invention
Technical problem to be solved by this invention provides under a kind of condition identical with prior art clay consumption can significantly improve the method for preparing ardealite baked brick of product strength, increases the purpose that the phosphogypsum consumption reduces the clay consumption thereby reach.
Technical scheme provided by the present invention is: comprise phosphogypsum, molding adhesive material, interior fuel and catalysis toughener, fully behind the mixing, moulding, dry, under 700-900 ℃ of condition, fired 30-55 hour, described molding adhesive material package is drawn together clay, shale, and interior fuel package is drawn together cinder, coal, flyash, and the catalysis toughener is FeCl 3, Fe 2(SO 4) 3, Fe (OH) 3, FeCl 2, FeSO 4, Fe (OH) 2In one or more combine.Weight ratio is followed successively by 1: 0.39-2.2: 0.00-0.66: 10.06-0.26.
Above-mentioned technical scheme is based on following principle and designs: be aggregate with the phosphogypsum, clay, shale are binding agent, under 700-900 ℃ of temperature, because the katalysis of catalysis toughener, the mixture of phosphogypsum and clay, shale is easy to sintering, and with the variant clinkering of catalysis toughener together, make the brick body fine and close more, have higher-strength.
According to different needs, the comprehensive reasonable cost, the phosphogypsum treatment capacity, soil resource saving amount designs, and chooses following batching combination and can control prepared vitrified brick intensity between 10-13MPa.
Phosphogypsum, molding adhesive material, interior fuel and catalysis toughener weight ratio are followed successively by 1: 1.86-2.2: 0.00-0.26: 0.11-0.2.
Phosphogypsum, molding adhesive material, interior fuel and catalysis toughener weight ratio are followed successively by 1: 1.00-1.86: 0.06-0.34: 0.06-0.2.
Phosphogypsum, molding adhesive material, interior fuel and catalysis toughener weight ratio are followed successively by 1: 0.50-1.00: 0.09-0.22: 0.07-0.13.
Phosphogypsum, molding adhesive material, interior fuel and catalysis toughener weight ratio are followed successively by 1: 0.39-5.0: 0.00-0.06: 0.06-0.11.
The present invention compared with the prior art; have following positively effect: 1, catalysis toughener effect is remarkable; its adding can obviously improve the ultimate compression strength of brick body; therefore can be as required; the flexible prescription is farthest handled phosphogypsum, reduces and pollutes; protect farmland, have bigger economic and social benefit.2, the catalysis toughener cheaply is easy to get, and causes the cost of ardealite baked brick to reduce, and can compete mutually with existing clay brick.3, the invention process is simple, all can implement technical scheme of the present invention in the existing different brickmaking technology, thus not only be easy to apply at existing clay brick field, and can keep different process advantage in the prior art.
Embodiment
Various embodiments of the present invention are all fired as follows.Brickmaking technology: with phosphogypsum, moulding binding material, interior fuel, the charging in proportion of catalysis toughener, even through thorough mixing, to rolling, extrusion molding is banked up naturally and is dried, and advances kiln, and by certain calcining system sintering, cooling back kiln discharge is product.Calcining system is taked cryodrying, progressively heats up, and high temperature constant temperature, cools off, takes on kiln and respectively be with balance drying and preheating, roasting, insulation.Press the GB/T2542 method and measure ultimate compression strength.
1 ton of phosphogypsum is equipped with the material of following table, detects the intensity of vitrified brick
The embodiment numbering Clay (ton) Cinder (ton) FeSO 4(ton) Fire top temperature (℃) The firing time (hour) Intensity (MPa) Compare sample intensity (MPa) Prior art intensity (MPa)
1 0.39 0 0.06 900 55 10.1 0.4 /
2 0.45 0.03 0.06 900 52 10.3 0.5 /
3 0.50 0.08 0.08 900 50 10.4 1.8 /
4 0.58 0.09 0.09 800 40 10.3 2.1 2.7
5 0.64 0.13 0.11 900 48 10.7 2.3 2.0
6 0.67 0.18 0.12 900 48 10.9 2.4 3.1
7 0.80 0.19 0.13 900 48 11.2 2.6 /
8 1.0 0.14 0.14 900 48 11.5 3.3 /
9 1.22 0.12 0.15 900 48 11.7 3.6 /
10 1.73 0.12 0.18 900 46 12.2 5.5 5.2
11 1.85 0.12 0.16 900 46 11.5 5.8 /
12 1.90 0.16 0.16 900 46 11.6 6.0 /
13 2.10 0 0.19 900 55 12.8 6.5 /
14 2.20 0 0.13 900 50 10.7 6.9 /
Comparison sample intensity in the last table is meant has removed FeSO 4All the other prescriptions of back ultimate compression strength identical and gained vitrified brick under same processing condition.The intensity of prior art is meant: the prior art intensity that compares with embodiment 4 is to account for sum 60% for phosphogypsum by weight percentage in proportioning raw materials, clay comprises 35%, flyash accounts for 5%, and maturing temperature is 800 ℃, and roasting time is the ultimate compression strength that makes vitrified brick under 40 hours the condition; With embodiment 6 prior art intensity relatively be in proportioning raw materials by weight percentage for phosphogypsum accounts for 60%, Huangshi sand and coal gangue compound are 40%, maturing temperature is 900 ℃, roasting time is the ultimate compression strength that makes vitrified brick under 48 hours the condition; With embodiment 5 prior art intensity relatively be in proportioning raw materials by weight percentage for phosphogypsum accounts for 55%, shale is 35%, silicate additive 10%, maturing temperature are 900 ℃, roasting time is the ultimate compression strength that makes vitrified brick under 48 hours the condition; The prior art intensity that compares with embodiment 10 is to account for sum 33% for phosphogypsum by weight percentage in proportioning raw materials, clay comprises 57%, flyash accounts for 10%, and is dry qualified under 120 ℃ of temperature, burns till the ultimate compression strength that made vitrified brick in 3-4 hour again under 900 ℃ of temperature condition.
Above data show that the present invention is after having added the catalysis toughener, and the intensity of vitrified brick is all improved significantly.
Change the catalysis toughener material among the embodiment 8, be respectively by ultimate compression strength with sampling technology gained vitrified brick:
The catalysis toughener FeCl 3 Fe 2(SO 4) 3 Fe(OH) 3 FeCl 2 FeSO 4 Fe(OH) 2
Ultimate compression strength MPa 9.2 12.0 11.5 10.1 11.5 11.6
The shale that moulding binding material among the embodiment 8 is changed into same ratio by the ultimate compression strength with sampling technology gained vitrified brick is: 10.7MPa;
The cinder that interior fuel among the embodiment 8 is changed into different ratios is respectively by the ultimate compression strength with sampling technology gained vitrified brick:
Cinder 0 0.05 0.1 0.2 0.3 0.5 0.55
Fire top temperature (℃) 900 900 900 900 900 900 900
The firing time (hour) 48 48 48 48 48 48 48
Ultimate compression strength MPa 10.1 10.7 11.9 11.7 10.9 10.6 10.4
The flyash that interior fuel among the embodiment 8 is changed into same ratio by the ultimate compression strength with sampling technology gained vitrified brick is: 10.3MPa.

Claims (5)

1, the preparation method of ardealite baked brick, comprise phosphogypsum, molding adhesive material, interior fuel and catalysis toughener, fully behind the mixing, moulding, dry, fired 30-55 hour under 700-900 ℃ of condition, described molding adhesive material package is drawn together clay, shale, interior fuel package is drawn together cinder, coal, flyash, it is characterized in that: the catalysis toughener is FeCl 3, Fe 2(SO 4) 3, Fe (OH) 3, FeCl 2, FeSO 4, Fe (OH) 2In one or more combine, phosphogypsum, molding adhesive material, interior fuel and catalysis toughener weight ratio are 1: 0.39-2.2: 0.00-0.66: 0.06-0.26.
2, according to the preparation method of the described ardealite baked brick of claim 1, it is characterized in that: phosphogypsum, molding adhesive material, interior fuel and catalysis toughener weight ratio are followed successively by 1: 1.86-2.2: 0.00-0.26: 0.11-0.2.
3, according to the preparation method of the described ardealite baked brick of claim 1, it is characterized in that: phosphogypsum, molding adhesive material, interior fuel and catalysis toughener weight ratio are followed successively by 1: 1.00-1.86: 0.06-0.34: 0.06-0.2.
4, according to the preparation method of the described ardealite baked brick of claim 1, it is characterized in that: phosphogypsum, molding adhesive material, interior fuel and catalysis toughener weight ratio are followed successively by 1: 0.50-1.00: 0.09-0.22: 0.07-0.13.
5, according to the preparation method of the described ardealite baked brick of claim 1, it is characterized in that: phosphogypsum, molding adhesive material, interior fuel and catalysis toughener weight ratio are followed successively by 1: 0.39-0.5: 0.00-0.06: 0.06-0.11.
CNB021131848A 2002-06-18 2002-06-18 Method for preparing phosphogypsum baked brick Expired - Fee Related CN1233585C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CNB021131848A CN1233585C (en) 2002-06-18 2002-06-18 Method for preparing phosphogypsum baked brick

Publications (2)

Publication Number Publication Date
CN1465540A CN1465540A (en) 2004-01-07
CN1233585C true CN1233585C (en) 2005-12-28

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100424034C (en) * 2006-08-25 2008-10-08 华中科技大学 Compound bricks of phosphogypsum, and producing method
CN101328033B (en) * 2008-07-15 2010-10-06 武汉理工大学 Sintering promoting strengthening agent for sintered product with high content of flyash and preparation thereof
CN101774797B (en) * 2009-12-30 2011-12-21 铜陵化学工业集团有限公司 Preparation method of ardealite baked brick
CN103044007A (en) * 2012-12-31 2013-04-17 徐立萧 Standard brick material prepared by taking phosphogypsum as raw material and preparation method of standard brick
CN106348726A (en) * 2016-08-23 2017-01-25 柳州市国正机电物资有限责任公司 Manufacturing method of brick for buildings
CN107686333B (en) * 2017-09-25 2020-02-04 贵州开磷磷石膏综合利用有限公司 Phosphogypsum ceramsite used as filler and preparation method thereof

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