CN1208277C - Method for preparing red cement using activated red mud rock - Google Patents

Method for preparing red cement using activated red mud rock Download PDF

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Publication number
CN1208277C
CN1208277C CNB031590144A CN03159014A CN1208277C CN 1208277 C CN1208277 C CN 1208277C CN B031590144 A CNB031590144 A CN B031590144A CN 03159014 A CN03159014 A CN 03159014A CN 1208277 C CN1208277 C CN 1208277C
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red
cement
gypsum
mud rock
activated
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CN1522981A (en
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黄少文
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Nanchang University
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Nanchang University
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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
    • C04B28/02—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 hydraulic cements other than calcium sulfates
    • 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
    • C04B18/0409—Waste from the purification of bauxite, e.g. red mud
    • 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)
  • Environmental & Geological Engineering (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The present invention relates to a method for preparing red cement by activated red mud rock. Red mud rock is used as raw material; after calcined and activated at high temperature, the red mud rock is matched with other raw materials according to the following quality percentage: 30% to 60% of activated red mud rock, 2% to 4% of gypsum, 0.3% to 0.8% of additive, 3% to 5% of iron red and surplus cement clinker; mixed powder is milled to proper fineness. The present invention uses the natural red hue of the red mud rock and the activated pozzolanic activity at the high temperature to make a product have a natural and stable red and good mechanical performance. The activated red mud rock has high matching quantity. Red cement prepared by the present invention, relative to ordinary red cement, largely reduces cost. The product has a high performance price rate. The present invention largely saves limestone resources, fully uses idle red mud rock resources, and reduces CO2 discharge in the production of the red cement.

Description

The preparation method of activation red mudstone red cement
Technical field the invention belongs to the New Building Materials field, relates to the preparation method of utilization of inorganic non-metallic mineral products and decoration cement.
The method of the existing production colored cement of background technology has two kinds: a kind of is to burn color method, promptly mixes coloring element at home and abroad at cement slurry, is fired into the cement clinker with specific color under different atmosphere; Another kind of is toning method, i.e. admixture pigment coloring in white cement.Burn color method to raw material and production requirement strictness, color is difficult for stable, adopts less at home; The toning method is because production technique is simple, and therefore technology is grasped easily is the main method of domestic preparation colored cement.But the colored cement color poor durability of toning method preparation is very easily analysed the salt scum and is influenced the homogeneity of color, and production cost is higher.
Be to reduce the production cost of colored cement, domestic some enterprise in white cement admixture some have the blended material of certain tinting strength and lateral reactivity, and join and mix tinting material and prepare colored cement.Produce green cement method as disclosing a kind of chrome ore slag that utilizes among " cement information " 1991 (5,6) and the ZL85106312 respectively; A kind of waste Aluminum slag that utilizes is disclosed in " Chongqing Architectural Engineering College's journal " 1991 (1)---red mud is produced red cement method etc.These methods can effectively reduce production costs, but because the color and the quality of industrial residue are all very unstable, cement intensity are also had considerable influence, therefore are difficult to the preparation quality stable product." cement. lime " disclose a kind of natural red soil ore that utilizes in 1991 (6) and mixed preparation red cement method in the white cement as blended material.This iron-holder is less up to the source of the laterite more than 70%, though its tool pigmentation is because of its unreactiveness can only be mixed as the fillibility material, when addition content reaches 20%, the intensity of product is fallen promptly and is surpassed 30%, and the decorative engineering that is not suitable for requirement of strength is used.
The object of the invention provides a kind of preparation method who utilizes red mudstone to prepare the red cement with premium properties; to overcome many defectives of existing colored cement product, all has special advantages at aspects such as the utilization of resources, environment protection, product performance, production costs.
Summary of the invention the present invention promptly is to be main raw material with the red mudstone, after it is carried out high-temperature activation, utilize white portland cement or ordinary portland cement clinker to make exciting agent, and join and mix a spot of gypsum, hardening accelerator, iron oxide red etc., combined grinding is made the red gelling material with stable color and good physical and mechanical property.
The present invention realizes by following approach:
(1) red mudstone is levigate and carry out high-temperature calcination activation;
(2), and mix and join combined grinding to the fineness that suits in ball mill such as gypsum, hardening accelerator, iron oxide red and promptly get product with red mudstone after the high-temperature calcination activation and white portland cement clinker collocation batching.
Each component carries out proportioning by following mass ratio:
Activation red mudstone: 30-60% gypsum: 2-4%
Admixture: 0.3-0.8% iron oxide red: 3-5%
Remaining is cement clinker.
The said red mudstone of the present invention is levigate to be meant that generally being crushed to 80 μ m square hole sieves tails over less than 10%.
The said high-temperature calcination activatory of the present invention temperature, decide on the red mudstone guide mineral, be generally 800-1100 ℃, if the red mudstone of taking mineral as the leading factor with kaolinite is got the temperature lower bound, get the high limit of temperature based on the red mudstone of white mica, purpose is by high-temperature calcination red mudstone to be activated.
The said high-temperature calcination of the present invention can be carried out in rotary kiln, also can carry out in shaft kiln.
The said gypsum of the present invention can be a natural dihydrate gypsum, also can be dehydrated gyp-or industrial waste gypsum.
The said admixture of the present invention can be one or more in hardening accelerator, water reducer, water-resisting agent, the dispersion agent.
The said fineness that combined grinding extremely suits in ball mill of the present invention is meant that generally 80 μ m square hole sieves tail over less than 3%.
The said cement clinker of the present invention also can mix the part ordinary portland cement clinker based on white portland cement clinker, to improve its early strength.
The direct and white portland cement collocation batching of red mudstone after the present invention also can activate high-temperature calcination.
Activation red mudstone red cement of the present invention utilizes the natural red color of red mudstone and the pozzolanic activity after its activation, makes made red cement product have stable color, good physical and mechanical property and lower production cost.The physical and mechanical property of red mudstone red cement and common red cement and white cement sees Table 1-2,2-2,3-2.
As show 2-2 as seen, with white cement (B 0, contain white stone powder about 10%) to compare, the red mudstone volume was less than 35% o'clock, and the average intensity of product is fallen less than 10%; The red mudstone volume surpasses at 55% o'clock, and intensity is fallen also and had only about 15%.Can satisfy the engineering application requiring fully.
Compare with existing colored cement and production technique thereof, the present invention has following characteristics:
(1) red mudstone is natural red-purple or ember, behind high-temperature activation, the lightness and the saturation ratio of color further improve, behind a small amount of iron oxide red of admixture (＜5%), can prepare the red product of brick-red or shale, and ordinary method prepares red cement and needs the admixture iron oxide red generally reach about 15% with good colourity;
(2) red mudstone is taken mineral as the leading factor with white mica, kaolinite or montmorillonite, and after high-temperature activation was handled, these mineral decomposited active SiO 2, Al 2O 3, high calcium mineral in they and the cement clinker and the reaction of the vitriol in the gypsum form a large amount of hydrated calcium silicate gel (C-S-H) and ettringite (AFt), thereby the gain in strength of product is played a positive role;
(3) because the activation red mudstone has higher activity, its dosage can be up to 40-60%, and the unlikely product that causes has bigger intensity to fall, thereby product cost is lower, saved the mud Wingdale of heating up water simultaneously, significantly reduced because of the CO of decomposition of limestone to airborne release 2Quantity has environment protection significance;
(4) because system's basicity descends significantly, fundamentally avoided the scum phenomenon of saltouing with the colored cement of red mudstone preparation, so the color of product is uniform and stable, good endurance;
(5) red mudstone source is abundant, and exploitation is convenient, and color stable is cheap, for low cost, the high-performance of product provides assurance.
Embodiment the present invention will be further described by following examples.
Embodiment 1:
(its physicals sees Table the sample C among the 1-2 to the white portland cement clinker that adopts certain factory to produce 0), Xylene Red mud stone and dihydrate gypsum, iron oxide red, compound additive starting material such as (forming) by hardening accelerator, water reducer, exciting agent etc.The chemical ingredients of main raw material(s) sees Table 1-1.
Table 1-1 main raw material(s) chemical ingredients (%)
Raw material Loss SiO 2 Al 2O 3 Fe 2O 3 CaO MgO f-CaO ∑
White cement clinker - 23.32 5.25 0.33 68.50 0.50 1.10 99.06
Red mudstone I 7.13 61.05 18.23 6.50 0.09 1.28 -- 94.28
Red mudstone I is carried out X-ray diffraction analysis show, secondly the clay mineral in the red mudstone is kaolinite based on white mica, and a spot of montmorillonite and chlorite are arranged.
Tail over less than 10% to 80 μ m square hole sieves levigate after the red mudstone drying, utilize calcined by rotary kiln (1100 ℃ of control high temperature zone temperatures are about thermal zone residence time 40min), calcination product is put in storage through cooler cooling back.After will calcining red mudstone and pressing different ratios and white cement clinker, gypsum, tinting material etc. cooperate, grinding to 80 μ m square hole sieve tails over less than 3% and promptly gets product in the feeding ball mill.The physical and mechanical property of proportion scheme and product sees Table 1-2.Product is carried out alkaline-resisting reinforcement experiment, the experiment of molten water and sun-proof experiment, and cement paste surface nothing is faded and is whitened white phenomenon.
The physical and mechanical property of table 1-2 red mudstone red cement
Test piece number (Test pc No.) Proportioning/% Stability Color Denseness/% Time of coagulation h:min Folding strength MPa Ultimate compression strength MPa
White cement clinker Gypsum Red mudstone Iron oxide red Admixture Initial set Final set 3d 28d 3d 28d
C 0 97 3 - - - Qualified In vain 27.0 1:20 2:05 5.8 7.9 29.8 58.5
H 1 56.5 3 35 5 0.5 Qualified Brick red 27.5 2:30 3:15 5.2 7.0 27.5 52.5
H 2 46.5 3 45 5 0.5 Qualified Brick red 28.0 2:60 3:40 4.7 6.7 25.1 48.7
H 3 36.5 3 55 5 0.5 Qualified Brick red 28.0 3:00 4:30 4.1 6.3 22.0 45.0
Embodiment 2:
Adopt 42.5 grades of white portland cements (containing white stone powder 10%) that certain factory produces, Xylene Red mud stone etc. to be basic raw material.The chemical ingredients of main raw material sees Table 2-1:
Table 2-1 main raw material chemical ingredients (%)
Raw material Loss SiO 2 Al 2O 3 Fe 2O 3 CaO SO 3 MgO ∑
White cement 7.93 18.34 5.00 0.12 64.60 1.47 1.40 98.86
Red mudstone I 7.13 61.05 18.23 6.50 0.09 - 1.28 94.28
1100 ℃ of incinerating red mudstones and white cement, tinting material and admixture etc. are prepared burden, and combined grinding tails over less than 3% to 80 μ m square hole sieves and promptly gets product in ball mill.The physical and mechanical property of proportion scheme and product sees Table 2-2.
Table 2-2 red mudstone red cement and common red cement physical and mechanical property are relatively
Cement type Proportioning/% Stability Color Denseness/% Time of coagulation h:min Folding strength MPa Ultimate compression strength MPa
White cement Red mudstone Iron oxide red Admixture Initial set Final set 3d 28d 3d 28d
B 0 100 - - - Qualified In vain 28.0 1:45 2:42 4.2 6.9 26.8 48.5
B 1 85 15 - Qualified Brick red 27.5 2:33 3:01 3.7 6.3 20.5 43.3
R 1 59.5 35 5 0.5 Qualified Brick red 28.0 2:50 3:22 4.0 6.7 26.5 46.8
R 2 49.5 45 5 0.5 Qualified Brick red 28.0 2:55 3:50 3.8 6.5 23.1 42.3
R 3 39.5 55 5 0.5 Qualified Brick red 28.5 3:20 4:50 3.4 6.0 19.0 40.5
Embodiment 3:
The white portland cement clinker, the Xylene Red mud stone that adopt certain factory to produce are basic raw material.The chemical ingredients of main raw material is seen 3-1:
Table 3-1 main raw material(s) chemical ingredients (%)
Raw material Loss SiO 2 Al 2O 3 Fe 2O 3 CaO MgO f-CaO ∑
White cement clinker - 23.62 5.37 0.28 68.30 0.20 1.55 99.32
Red mudstone II 7.26 69.16 15.70 4.87 0.97 0.41 - 98.37
Through X-ray diffraction analysis, the guide mineral among the red mudstone II is a montmorillonite, is illite secondly, a spot of kaolinite and quartz.Tail over less than 10% to 80 μ m square hole sieves levigate after the red mudstone drying, 850 ℃ of following 2 hours (carrying out in the retort furnace) of calcining, feed in the test ball mill grinding to 80 μ m square hole sieve after the cooling back cooperates with white portland cement clinker, dihydrate gypsum, admixture etc. by different ratios and tail over less than 3% and obtain product.The physical and mechanical property of product sees Table 3-2.
The physical and mechanical property of table 3-2 red mudstone red cement
Test piece number (Test pc No.) Proportioning/% Stability Color Denseness/% Time of coagulation h:min Folding strength MPa Ultimate compression strength MPa
White cement clinker Gypsum Red mudstone Iron oxide red Admixture Initial set Final set 3d 28d 3d 28d
C 1 97 3 - - Qualified In vain 27.5 1:38 2:25 6.3 8.2 28.9 62.0
S 1 56.5 3 35 5 0.5 Qualified Brick red 28.0 2:55 3:34 5.6 7.4 25.5 53.4
S 2 46.5 3 45 5 0.5 Qualified Brick red 28.0 2:58 3:50 5.2 7.0 24.2 49.5
S 3 36.5 3 55 5 0.5 Qualified Brick red 28.0 3:29 4:16 4.1 6.3 21.8 46.7

Claims (7)

1, a kind of preparation method who activates the red mudstone red cement, it is characterized in that with the red mudstone being raw material, red mudstone is milled down to 80 μ m square hole sieves to be tailed over less than 10%, after 800-1100 ℃ high-temperature calcination activation, cooperate by following mass percent: activation red mudstone 30-60%, gypsum 2-4% with other raw material, admixture 0.3-0.8%, iron oxide red 3-5%, surplus is cement clinker, combined grinding tails over less than 3% to 80 μ m square hole sieves.
2, preparation method according to claim 1 is characterized in that said cement clinker is a white portland cement clinker.
3, preparation method according to claim 2 is characterized in that mixing the part ordinary portland cement clinker.
4, preparation method according to claim 1 is characterized in that said gypsum is a natural dihydrate gypsum.
5, preparation method according to claim 1 is characterized in that said gypsum is a dehydrated gyp-.
6, preparation method according to claim 1 is characterized in that said gypsum is an industrial waste gypsum.
7, preparation method according to claim 1 is characterized in that said admixture comprises one or more in hardening accelerator, water reducer, water-resisting agent, the dispersion agent.
CNB031590144A 2003-09-10 2003-09-10 Method for preparing red cement using activated red mud rock Expired - Fee Related CN1208277C (en)

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101851110B (en) * 2010-05-17 2012-11-28 南昌大学 Method for preparing light building material ceramic particle by utilizing slate sawn mud
BR102013011886A2 (en) * 2013-04-30 2015-10-20 Fundação Educacional De Criciuma process for producing fine cement aggregate from red mud resulting from the bauxite beneficiation process (bayer process)
CN103833316B (en) * 2014-01-21 2016-05-11 南昌大学 Utilize burning sludge ash to prepare the method for colored portland cement
CN108298946A (en) * 2018-03-08 2018-07-20 湖南金木陶瓷有限公司 The manufacturing method of modified laterite and its obtained modification laterite and application and domestic ceramics
EP4183757A1 (en) * 2021-11-22 2023-05-24 Vito NV Process for the production of a cement substitute
CN115321937B (en) * 2022-09-14 2024-01-02 昆明理工大学 Laterite-calcium carbonate-cement-based composite material and preparation method thereof

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Granted publication date: 20050629