CN113024133A - Sulfate-resistant low-alkali portland cement and preparation method thereof - Google Patents

Sulfate-resistant low-alkali portland cement and preparation method thereof Download PDF

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Publication number
CN113024133A
CN113024133A CN202110148893.4A CN202110148893A CN113024133A CN 113024133 A CN113024133 A CN 113024133A CN 202110148893 A CN202110148893 A CN 202110148893A CN 113024133 A CN113024133 A CN 113024133A
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China
Prior art keywords
carbide slag
sulfate
slag
percent
low
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CN202110148893.4A
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Chinese (zh)
Inventor
杨波
佟小念
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Xinjiang Fukang Tianshan Cement Co ltd
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Xinjiang Fukang Tianshan Cement Co ltd
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Priority to CN202110148893.4A priority Critical patent/CN113024133A/en
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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
    • C04B7/00—Hydraulic cements
    • C04B7/24—Cements from oil shales, residues or waste other than slag
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/02—Portland cement
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention relates to the technical field of cement manufacture, in particular to sulfate-resistant low-alkali portland cement and a preparation method thereof, wherein the sulfate-resistant low-alkali portland cement comprises the following raw materials in percentage by mass: 12% -13% of ceramic soil residues; 3.5 to 4 percent of copper slag; 3% -4% of silicon powder; 80% -82% of carbide slag; the raw materials are dried, ground and calcined, and the sulfate-resistant low-alkali portland cement and the preparation method thereof realize effective utilization of carbide slag and save a large amount of resources; the main component of the carbide slag is calcium hydroxide, CO2 is not generated during calcination, the carbide slag is easy to calcine, the energy consumption is low, the production cost is low, the resource waste and the environmental pollution are avoided, and the carbide slag is low-carbon and environment-friendly; the produced clinker and cement have high strength and stable quality, and the best effect is achieved.

Description

Sulfate-resistant low-alkali portland cement and preparation method thereof
Technical Field
The invention relates to the technical field of cement manufacture, in particular to sulfate-resistant low-alkali portland cement and a preparation method thereof.
Background
The carbide slag is waste slag which is obtained by hydrolyzing carbide to obtain acetylene gas and takes calcium hydroxide as a main component, the sintering performance of CaO obtained by decomposing the carbide slag and limestone is different, the crystal structure is different, and the crystal form of main minerals obtained by preparing cement clinker from the carbide slag is different. The harmful elements in the carbide slag are sulfur: causing skinning, formation of a thionine ring, alkali chloride, sulfate, chlorine: the preheater is skinned and blocked, and the clinker strength is reduced; alkali: causing skinning, formation of a sulfur alkali ring at the kiln tail, magnesium oxide: periclase, expanding in volume, damaging the concrete. Because of the particularity of production and more harmful components in the carbide slag production line, the difficulty in producing special varieties of cement is high, the alkali content in western regions of China is high, the investment of the western development of China in railways, tunnels and hydraulic engineering is increased, the demand for high-medium and low-alkali resistant cement is increased year by year, and the research and development of high-medium and sulfate-resistant low-alkali cement by using the carbide slag cement clinker production line becomes an urgent problem to be solved.
Disclosure of Invention
In order to solve the above-mentioned defects in the prior art, the present invention aims to provide a sulfate-resistant low-alkali portland cement and a preparation method thereof.
In order to achieve the purpose, the invention provides the following technical scheme: the sulfate-resistant low-alkali portland cement comprises the following raw materials in percentage by mass: 12% -13% of ceramic soil residues; 3.5 to 4 percent of copper slag; 3% -4% of silicon powder; 80% -82% of carbide slag; the raw materials are dried, ground and calcined to obtain the product.
Preferably, the ceramic soil slag is 12.35%, the copper slag is 3.61%, the silicon powder is 3.04%, and the carbide slag is 81%.
Preferably, the method comprises the following steps: drying the carbide slag: drying the wet carbide slag to prepare carbide slag dry powder, and storing the carbide slag dry powder in a storage; ② raw material preparation: 12 to 13 percent of ceramic soil slag, 3.5 to 4 percent of copper slag and 3 to 4 percent of silicon powder are metered and conveyed to enter a raw material grinding system for grinding, and qualified raw materials enter a homogenizing warehouse for storage and homogenization; ③ calcining clinker: calcining the homogenized raw material in a kiln to obtain low-alkali clinker; preparing cement: and (3) further calcining the low-alkali clinker fired in the step (III) according to the mass ratio of 12.35 percent of ceramic soil slag, 3.61 percent of copper slag, 3.04 percent of silicon powder and 81 percent of carbide slag, and grinding the cement into powder to obtain the high-medium sulfate-resistant low-alkali cement.
The invention has the beneficial effects that: the sulfate-resistant low-alkali portland cement and the preparation method thereof realize effective utilization of carbide slag and save a large amount of resources; the main component of the carbide slag is calcium hydroxide, CO2 is not generated during calcination, the carbide slag is easy to calcine, the energy consumption is low, the production cost is low, the resource waste and the environmental pollution are avoided, and the carbide slag is low-carbon and environment-friendly; the produced clinker and cement have high strength and stable quality, and the best effect is achieved.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto:
example 1
The sulfate-resistant low-alkali portland cement comprises the following raw materials in percentage by mass: 12% -13% of ceramic soil residues; 3.5 to 4 percent of copper slag; 3% -4% of silicon powder; 80% -82% of carbide slag; the raw materials are dried, ground and calcined to obtain the product.
Production line and raw material selection
And the two carbide slag production lines with 2500 tons of products per day and phi 4.0 x 60 meters of three-stage preheaters utilize the carbide slag cement clinker 1# production line to research and develop high-medium sulfate-resistant low-alkali cement in consideration of the difference of the 1# and 2# production processes.
Raw material Loss SiO2 Al2O3 Fe2O3 CaO MgO R2O ∑
Ceramic soil slag 4.01 66.4 18.14 4.35 1.26 2.6 1.3 98.06
Copper slag -4.24 33.12 7.37 53.53 5.45 2.71 1.47 97.94
Silicon powder 3.57 89.03 1.52 0.36 0.25 0.72 0.34 95.45
Carbide slag 27.11 3.97 1.83 0.24 65.14 0.72 0.35 99.01
Coal of northern tower mountainAsh of 0 22.82 8.85 9.91 34.12 7.17 1.48 82.87
Coal industry analysis
Technical index of high-medium-grade sulfate-resistant low-alkali cement and customer requirement index
Classification Middle sulfate resistant cement High sulfate-resistant cement
Tricalcium silicate content ≤55．O ≤50．O
Tricalcium aluminate content ≤5．O ≤3．O
14d linear expansion ratio ≤0.060 ≤0.040
R2O ≤0.60% ≤0.60%
Customer request 1d quick setting Strength ≥8. 5Mpa ≥8. 5Mpa
Trial production
Through the detection and selection of raw materials and the adjustment of the kiln production process, the aggregation of the content of chloride ions and alkali in a process system is overcome, the high-medium anti-sulfate low-alkali clinker is produced, and a proportioning scheme KH of medium saturation ratio and low aluminum rate is adopted, wherein the ratio KH is 0.880 +/-0.020N: 2.40 plus or minus 0.10P: 0.8 plus or minus 0.1
Date LOSS SiO2 Al2O3 Fe2O3 CaO MgO SO3 K2O Na2O R2O Cl- ∑ f-CaO KH KH- N P C3S C2S C3A C4AF
6.3 0.12 21.6 4.24 4.61 62.5 0.36 1.02 0.26 0.34 0.51 0.053 98.46 0.74 0.891 0.879 2.44 0.92 55.20 20.32 3.44 14.01
6.4 0.15 22.1 4.35 5.03 62.3 0.72 0.8 0.26 0.34 0.51 0.035 97.48 0.69 0.862 0.851 2.36 0.86 49.25 26.25 3.02 15.29
6.5 0.03 21.6 4.58 4.91 62.9 0.6 0.7 0.3 0.33 0.53 0.043 98.21 1.23 0.887 0.866 2.28 0.93 54.12 21.14 3.83 14.93
6.6 0.00 21.98 4.3 5.03 62.1 0.72 0.7 0.25 0.31 0.47 0.031 97.42 0.99 0.865 0.849 2.36 0.85 49.68 25.58 2.88 15.29
6.7 0.06 21.89 4.5 5.39 62.3 0.79 0.7 0.3 0.34 0.54 0.031 96.15 0.84 0.865 0.851 2.21 0.83 49.32 25.59 2.81 16.39
6.8 0.07 21.6 4.6 5.45 62.01 0.91 0.7 0.3 0.3 0.5 0.029 98.32 0.69 0.868 0.857 2.15 0.84 49.59 24.56 2.97 16.57
6.9 0.11 21.9 4.5 4.95 62.3 0.6 0.7 0.31 0.3 0.51 0.031 98.63 0.74 0.867 0.855 2.32 0.91 49.87 25.20 3.55 15.05
Physical properties of high-medium sulfate-resistant low-alkali clinker
Date 1d quick setting strength 3d fold 3d pressure 28d fold Pressure of 28d Resistance to sulfate
6.3 10.0 5.8 28.7 8.7 58.1 0.050
6.4 10.2 5.7 26.9 8.5 55.1 0.035
6.5 9.8 5.6 28.8 9.2 62.6 0.040
6.6 9.8 5.4 28.7 8.5 55.1 0.039
6.7 10.5 5.3 27.5 8.3 54.9 0.037
6.8 10.8 5.4 28.7 8.5 54.8 0.038
6.9 10.2 5.4 28.3 8.9 60.3 0.038
Determination of clinker rate values and batching schedules
According to the test production conditions of 3 days in 6 months to 9 days in 6 months, controlling the clinker KH to be 0.890, controlling the tricalcium silicate to be less than 55%, controlling the tricalcium silicate to be less than 50% in 0.870, determining that the clinker KH is controlled to be 0.880 +/-0.020, controlling the aluminum rate to be 0.80 +/-0.010, controlling the 1d quick setting strength, the 3-day strength and the 28-day strength to meet the requirements, and controlling the indexes of clinker production according to the following clinker three-rate values in the future: KH of 0.880 +/-0.020N: 2.40 plus or minus 0.10P, 0.8 plus or minus 0.1, and separately stacking 50-55% and less than 50% of tricalcium silicate of the high, medium and low-alkali sulfate clinker produced in 3 days in 6 months to 9 days in 6 months, and finally stacking.
The production of the high-medium sulfate-resistant low-alkali cement is characterized in that high-medium sulfate-resistant low-alkali clinker is produced in a 1# production line at 7 months and 19 days according to a batching scheme and raw material components produced in 6 months, the produced clinker meets the technical indexes of the high-medium and medium-resistant low-alkali clinker, the high-sulfate-resistant low-alkali cement is produced in 7 months and 25 days, and the GB 748-2005 standard and requirements of sulfate Portland cement are met.
Date Loss on ignition MgO SO3 Insoluble substance C3S C3A Specific area Consistency of Initial setting Final setting 1d quick setting strength 3d bending resistance 3d resistance to compression Resisting fracture in 28 days 28d resistance to compression Resistance to sulfate
7 month and 25 days 0.92 1.17 2.23 0.89 46.53 2.65 333 26.8 153 211 10.5 5.5 28.9 8.7 54.9 0.039
7 month and 26 days 0.98 1.06 2.25 0.87 45.36 2.78 329 26.4 174 229 11.0 5.2 26.6 8.8 55.1 0.04
7 month and 27 days 1.02 1.16 2.3 0.9 46.12 2.59 320 26.5 165 220 10.8 5.6 27.0 8.8 57.6 0.035
7 month and 28 days 1.03 1.09 2.22 0.91 45.2 2.68 322 26.3 168 225 10.9 5.6 27.5 8.9 55.5 0.038
7 month and 29 days 0.98 1.18 2.25 0.85 45.68 2.65 320 26.4 168 229 10.7 5.8 26 8.8 55.6 0.034
7 month and 30 days 0.97 1.08 2.31 0.83 45.32 2.69 319 26.4 165 230 10.9 5.5 27.1 8.7 57.1 0.035
7 month and 31 days 1.02 1.07 2.28 0.89 45.39 2.59 330 26.3 169 235 10.6 5.6 26.5 8.8 56.2 0.036
8 month and 1 day 1.04 1.12 2.32 0.92 45.28 2.68 319 26.3 169 229 10.8 5.5 26 8.5 56.1 0.032
In the embodiment, the ceramic soil slag is 12.35%, the copper slag is 3.61%, the silicon powder is 3.04%, and the carbide slag is 81%.
In addition, the method comprises the following steps: drying the carbide slag: drying the wet carbide slag to prepare carbide slag dry powder, and storing the carbide slag dry powder in a storage; ② raw material preparation: 12 to 13 percent of ceramic soil slag, 3.5 to 4 percent of copper slag and 3 to 4 percent of silicon powder are metered and conveyed to enter a raw material grinding system for grinding, and qualified raw materials enter a homogenizing warehouse for storage and homogenization; ③ calcining clinker: calcining the homogenized raw material in a kiln to obtain low-alkali clinker; preparing cement: and (3) further calcining the low-alkali clinker fired in the step (III) according to the mass ratio of 12.35 percent of ceramic soil slag, 3.61 percent of copper slag, 3.04 percent of silicon powder and 81 percent of carbide slag, and grinding the cement into powder to obtain the high-medium sulfate-resistant low-alkali cement.
The sulfate-resistant low-alkali portland cement and the preparation method thereof realize effective utilization of carbide slag and save a large amount of resources; the main component of the carbide slag is calcium hydroxide, CO2 is not generated during calcination, the carbide slag is easy to calcine, the energy consumption is low, the production cost is low, the resource waste and the environmental pollution are avoided, and the carbide slag is low-carbon and environment-friendly; the produced clinker and cement have high strength and stable quality, and the best effect is achieved.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (3)

1. The sulfate-resistant low-alkali portland cement is characterized by comprising the following raw materials in percentage by mass:
12% -13% of ceramic soil residues;
3.5 to 4 percent of copper slag;
3% -4% of silicon powder;
80% -82% of carbide slag;
the raw materials are dried, ground and calcined to obtain the product.
2. The sulfate-resistant low-alkali portland cement according to claim 1, wherein the ceramic soil residue is 12.35%, the copper residue is 3.61%, the silicon powder is 3.04%, and the carbide slag is 81%.
3. The sulfate-resistant low-alkali portland cement according to claim 2, comprising the following steps: drying the carbide slag: drying the wet carbide slag to prepare carbide slag dry powder, and storing the carbide slag dry powder in a storage; ② raw material preparation: 12 to 13 percent of ceramic soil slag, 3.5 to 4 percent of copper slag and 3 to 4 percent of silicon powder are metered and conveyed to enter a raw material grinding system for grinding, and qualified raw materials enter a homogenizing warehouse for storage and homogenization; ③ calcining clinker: calcining the homogenized raw material in a kiln to obtain low-alkali clinker; preparing cement: and (3) further calcining the low-alkali clinker fired in the step (III) according to the mass ratio of 12.35 percent of ceramic soil slag, 3.61 percent of copper slag, 3.04 percent of silicon powder and 81 percent of carbide slag, and grinding the cement into powder to obtain the high-medium sulfate-resistant low-alkali cement.
CN202110148893.4A 2021-02-03 2021-02-03 Sulfate-resistant low-alkali portland cement and preparation method thereof Pending CN113024133A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1158826A (en) * 1996-03-05 1997-09-10 陈建华 Pre-treatment of clay and claylike material in cement production
WO2009052671A1 (en) * 2007-10-26 2009-04-30 Xiaolin Yin A new process for producing cement clinker by using sludge in hygrometric state and two-stage blending
CN106277871A (en) * 2016-08-01 2017-01-04 郑州市王楼水泥工业有限公司 A kind of dry-process rotory kiln produces the production technology of high-sulfur calcium silicates low-carbon (LC) cement
CN107804982A (en) * 2017-10-25 2018-03-16 陕西北元化工集团股份有限公司 A kind of industrial residue low alkali cement and preparation method thereof
CN108689622A (en) * 2018-08-22 2018-10-23 四川省犍为宝马水泥有限责任公司 A kind of cement and preparation method thereof
CN110550874A (en) * 2019-07-09 2019-12-10 天辰水泥有限责任公司 Batching method for preparing portland cement clinker by low-emission full-industrial waste residues

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1158826A (en) * 1996-03-05 1997-09-10 陈建华 Pre-treatment of clay and claylike material in cement production
WO2009052671A1 (en) * 2007-10-26 2009-04-30 Xiaolin Yin A new process for producing cement clinker by using sludge in hygrometric state and two-stage blending
CN106277871A (en) * 2016-08-01 2017-01-04 郑州市王楼水泥工业有限公司 A kind of dry-process rotory kiln produces the production technology of high-sulfur calcium silicates low-carbon (LC) cement
CN107804982A (en) * 2017-10-25 2018-03-16 陕西北元化工集团股份有限公司 A kind of industrial residue low alkali cement and preparation method thereof
CN108689622A (en) * 2018-08-22 2018-10-23 四川省犍为宝马水泥有限责任公司 A kind of cement and preparation method thereof
CN110550874A (en) * 2019-07-09 2019-12-10 天辰水泥有限责任公司 Batching method for preparing portland cement clinker by low-emission full-industrial waste residues

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Application publication date: 20210625