CN1830866A - Cement clinker calcinated on vertical kiln using full calcium carbide slag to instead limestone and its preparation method - Google Patents
Cement clinker calcinated on vertical kiln using full calcium carbide slag to instead limestone and its preparation method Download PDFInfo
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- CN1830866A CN1830866A CNA2006100205079A CN200610020507A CN1830866A CN 1830866 A CN1830866 A CN 1830866A CN A2006100205079 A CNA2006100205079 A CN A2006100205079A CN 200610020507 A CN200610020507 A CN 200610020507A CN 1830866 A CN1830866 A CN 1830866A
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- cement clinker
- carbide slag
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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
- 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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- 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
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
Abstract
A cement clinker is proportionally prepared from calcium carbide dregs instead of lime stone, Si-Al correcting material, Fe material, and anthracite through baking, grinding, homogenizing, adding water, sphericizing and calcining in mechanical vertical kiln.
Description
Technical field
The present invention relates to building material field, especially a kind of all with replacing carbide slag with lime stone batching incinerating high quality cement clinker and preparation method thereof on the machine shaft kiln.
Background technology
China's cement clinker calcination technology experienced with the next stage:
1949 after liberation, and the development of China's Cement industry is many based on development wet-process rotary kiln cement burning technology in south, and the north is dry based on development dry-process rotary kiln production technology.Subsequently, a large amount of shaft kiln cement plants build up, and are the model with ordinary shaft kiln and machine shaft kiln, and along with science and technology and expanding economy, the machine shaft kiln becomes the major equipment of the burning clinker of cement of cement production enterprise, and ordinary shaft kiln is eliminated.
Traditional water bricklayer owner will adopt Wingdale as main raw material, utilizes correction materials such as widely distributed Wingdale raw material and clay, and a large amount of exploitation limestone mines cause the wasting of resources big, the cost height, and environmental disruption is serious, and eco-catastrophe has been caused in the area that has.And a large amount of industrial residues of Steel Plant, power station, chemical plant discharge do not obtain sufficient development and utilization, and trade waste also causes many environmental pollutions and destruction.
Carbide slag is calcium carbide (CaC
2) and water (H
2O) carry out alkaline residues behind the hydration reaction, the waste residue of discharging in chemical process, its major ingredient are calcium hydroxide, and its molecular formula is [Ca (OH)
2]; Be decomposed into CaO and H at 580 ℃ Time
2O.Because Ca (OH)
2Because of it is rich in calcium oxide, thus be the substitute of good Wingdale raw material, still, a large amount of carbide slags that discharge in this chemical plant do not obtain sufficient development and utilization, most cases can only adopt the way of accumulation, has both taken the soil, has caused environmental pollution and destruction again.
Though the past also has some cement production enterprises to utilize industrial waste production cement clinkers such as carbide slag, mostly is incorporation low (being generally 15-60%), energy consumption higher (more than the hear rate 1000KcaC/kg grog); As China utilize carbide slag produce cement clinker the earliest chemical plant, Jilin and Tianjin Chemical Plant arranged because they adopt backward wet processing, charge pulp is gone into kiln moisture content greater than 65%, the yielding poorly of kiln, the hear rate height, of poor benefits, make the utilization of carbide slag and insufficient; Chemical plant, Siping in 1989, it is the clinker from vertical kiln production line of part raw material with the carbide slag that Beifang Chloride ﹠ Alkali Group Co., Ltd. in 1992 has built, these cement production enterprises all add as auxiliary material the utilization of carbide slag, therefore the technician in the industry thinks generally that carbide slag can only partly mix and could stablize firing process, and can not large-scale utilization, if incorporation surpasses certain proportion, not only batching is difficult, and make balling-up and calcining that difficulty also take place, in the prior art without any the instruction that can to adopt the complete replacing lime masonry of carbide slag be the main raw material of manufacture of cement, the instruction that more not adopt the complete replacing lime masonry of carbide slag on the machine shaft kiln be the main raw material of manufacture of cement.
Studies show that recently, carbide slag can not be as the basic reason of the complete replacing lime stone of main raw material, be to know that owing to analyzing fully the contained composition of carbide slag is to producing the influence of cement, as higher,, make CaO too high levels in the raw material if the carbide slag volume is excessive in the machine shaft kiln is produced because of CaO content in the carbide slag, the balling-up water requirement is heightened, balling-up downgrade, and the grog free calcium oxide that burns till higher (f--CaO) will have a strong impact on soundness; Secondly, the water content of carbide slag also is an important reasons, and water content is too high, if adopt the dry mixing balling-up, energy consumption is increased and the production cost raising.
Therefore, how all to utilize replacing carbide slag with lime stone batching, in less investment, calcination of cement clinker on the low machine shaft kiln of energy consumption becomes a problem demanding prompt solution.
Summary of the invention
It is the method for main raw material at the mechanical shaft kiln burning high quality cement clinker with the complete replacing lime stone of carbide slag that order of the present invention is to overcome the shortcoming of above-mentioned prior art and provide a kind of, use this method calcination of cement clinker stable production process on the machine shaft kiln, investment more economizes, energy consumption is lower, cost is lower, and the cement clinker of being produced is best in quality.
The object of the present invention is achieved like this:
A kind of using full calcium carbide slag to instead limestone batching incinerating cement clinker on the machine shaft kiln is prepared as follows:
(A) composition preparation raw material as following weight percent:
Carbide slag 73-84%
Sal raw material 7-15%
Ferriferous raw material 0.5-5.5%
Hard coal 8-16%
Wherein, the calcium oxide content of described carbide slag is 56-70%, and water content is 15～25%;
Described sal raw material is shale and the mineral of deriving, wherein SiO
2Content is better more than 65%;
Described ferriferous raw material is sulfate slag or iron ore powder, wherein Fe
2O
3Content is better more than 40%;
(B) raw material described in (A) are dried to moisture content less than after 15%, combined grinding to 0.080mm square hole sieve tails over and is no more than 18% raw material powder, this raw material powder is gone into balling-up in the pan-pelletizer after stirring, wherein the pellet particle diameter is Φ 5-Φ 15mm mm, then pellet is gone into the kiln calcining, the klining temperature is controlled at 1400 ± 50 ℃, and staying the time in the high-temperature zone is 5～10 minutes, has both got cement clinker behind the cooling pellet.
Wherein, this burning clinker of cement process is specific as follows:
Add the nodules (particle diameter Φ 5-Φ 15mm) of water balling-up by machine shaft kiln balling-up system, be conveyed into the scattering plate at shaft kiln top, the layering uniform broadcasting is on machine shaft kiln top, and under the effect of 250 ℃ of-350 ℃ of rising hot gas flows, the pellet mechanical water is evaporated.
Along with even downward the moving of the thickening of the bed of material and the bed of material, above the suffered hot stream temperature of pellet more and more higher; Ca (OH) in the time of 350 ℃-650 ℃
2Resolve into CaO and H
2O.Generate a small amount of and CO of CaO
2Be combined into CaCO
3, in the time of 900 ℃, be decomposed into CaO and CO again
2, when pellet moved down (grog constantly draws off below kiln) to clinkering zone, temperature was up to 1350 ℃-1450 ℃, CaO and SiO
2,, AL
2O
3And Fe
2O
3Reaction generates Dicalcium Phosphate (Feed Grade) (C
2S), tricalcium silicate (C
3S) and tetracalcium aluminoferrite (C
4Silicate minerals such as AF), the cold wind cooling that the cement clinker of generation is sent into by the kiln bottom is sent into clinker warehouse after the discharging awl draws off, in order to grinding into the cement of different varieties.
This cement clinker contains the mineral composition of following weight percent:
C
3S 48～65
C
2S 15～25
C
3A 6.5～12.5
C
4AF 8～16
In addition, the Chemical Composition that contains following weight percent in this cement clinker:
LOSS 0.15～0.8
CaO 59～69
SiO
2 18～26
AL
2O
3 5～12
Fe
2O
3 1.5～4.5
SO
3 0.5～2.5.
MgO 0.6～1..5
Mechanical property of this cement clinker such as following table:
| Time of coagulation min | Ultimate compression strength Mpa | Folding strength Mpa | Stability | |||
| Initial set | Final set | 3 days | 28 days | 3 days | 28 days | Boil and boil |
| 136-154 | 178-205 | 24-28 | 62-64 | 4.5-6.5 | 7.8-8.5 | Qualified |
As can be seen from the above table, every mechanical performance index of this cement clinker meets national GB/T17671-1999 standard and GB/T13462001 standard.
The present invention has following advantage than prior art:
One, can make full use of waste carbide slag, sulfate slag, power plant's cinder etc. is industrial residue as the raw material of producing cement, increase substantially the blended amount of carbide slag in preparation cement process, changed the situation that carbide slag in the prior art can only add as auxiliary material, not only solved replacing lime stone resource problem, processing for trade waste provides ideal to utilize approach again, especially solve calcium carbide route and produced the environmental pollution that carbide slag that PVC produces brings, turn waste into wealth, realize resources circulation comprehensive utilization and sustainable development, and more can economize on resources and energy consumption, reduce the discharging of pollutent, be beneficial to and reduce cost and environment protection, remarkable economic efficiency and social benefit are arranged;
Two, utilize carbide slag to be main raw material mechanical shaft kiln burning cement clinker, because the carbide slag decomposition temperature is lower 400 ℃ than Wingdale, decompose the low 1000KJ/kg grog of hear rate, than using Wingdale to reduce the hear rate of burning till of cement clinker significantly;
Three, utilize carbide slag to be main raw material calcination of cement clinker on the machine shaft kiln, ultimate production is 50t/h during platform, 3 days ultimate compression strength of grog is 32Mpa, 3 days folding strengths are 5.8Mpa, 28 days ultimate compression strength 62Mpa of grog, 28 days folding strengths are 9.5Mpa, and employing Portland cement prescription calcination of cement clinker, ultimate production is 43t/h during platform, and 3 days ultimate compression strength of grog is 21Mpa, and 3 days folding strengths are 4.2Mpa, 28 days ultimate compression strength of grog is 52Mpa, 28 days folding strengths are 6.2Mpa, and obvious unit-hour output of the present invention is higher, and clinker quality is better;
They are four years old, the present invention is applicable to the production of machine shaft kiln, adopt formulation cement clinker provided by the invention can avoid the generation of the destabilization phenomenon in calcination process that causes because of calcium oxide content is too high, also fully solved carbide slag water content size to producing the influence of cement clinker, be easier to apply.
They are five years old, the present invention is applicable to the machine shaft kiln dry mixing and the calcining process thereof of various different sizes, solved the homogenizing of raw material, various key technical problems in pre-watering granulation and the mechanical shaft kiln burning, high yield, low consumption, high-quality have not only been realized, and the investment saving, be easy to expand wide use, can produce good economic benefit and social benefit.
Embodiment
Below in conjunction with accompanying drawing and and by 3 embodiment, the invention will be further described, but the present invention has more than and is limited to these examples:
Following sal raw material adopts and contains SiO
2Reach the shale more than 65% and the mineral of deriving thereof; Ferriferous raw material adopts and contains Fe
2O
3At 40% above sulfate slag or iron ore powder; Its ash content Chemical Composition (weight %) is as follows behind the anthracite combustion:
| Composition | CaO | SiO 2 | AL 2O 3 | Fe 2O 3 | MgO | SO 3 |
| Content | 5.01 | 49.47 | 26.95 | 10.50 | 1.60 | 4.28 |
Embodiment 1: the weight proportion of each raw material is: carbide slag 73%, shale 15%, ferriferous raw material 4%, hard coal 8%, with described raw material dry be 14% to moisture content after, combined grinding to 0.080mm square hole sieve tails over and is no more than 18% raw material powder, this raw material powder is gone into balling-up in the pan-pelletizer after stirring, wherein the pellet particle diameter is Φ 5-Φ 15mm, then pellet is gone into the kiln calcining, the klining temperature is controlled at 1400 ± 50 ℃, is 5～10 minutes in the high-temperature zone residence time, promptly gets cement clinker after the cooling.
The physical and mechanical property of the cement clinker of calcining out on the machine shaft kiln with above-mentioned prescription sees Table one, and its Chemical Composition and mineral composition see Table two:
Table one: the mechanical property of machine shaft kiln clinker
| Time of coagulation min | Ultimate compression strength Mpa | Folding strength Mpa | Stability | |||
| Initial set | Final set | 3 days | 28 days | 3 days | 28 days | Boil and boil |
| 136 | 184 | 24 | 62 | 5.4 | 7.8 | Qualified |
Table two: the Chemical Composition of machine clinker from vertical kiln and mineral composition
| Mineral composition | Chemical Composition | |||||||||
| C 3S | C 2S | C 3A | C 4AF | LOSS | CaO | SiO 2 | AL 2O 3 | Fe 2O 3 | SO 3 | MgO |
| 48.46 | 22.43 | 11.46 | 11.19 | 0.8 | 64.67 | 20.21 | 6.68 | 3.68 | 1.88 | 1.08 |
It is levigate to 0.08mm square hole sieve＜10% that the kiln discharge grog adds mixing materials such as a certain proportion of gypsum and slag, can produce the qualified cement of different varieties, the physicals such as the table three of its cement:
Table three: the mechanical property of machine shaft kiln cement (P.O32.5)
| Time of coagulation min | Ultimate compression strength Mpa | Folding strength Mpa | Stability | |||
| Initial set | Final set | 3 days | 28 days | 3 days | 28 days | Boil and boil |
| 156 | 221 | 18 | 42.5 | 3.9 | 8.1 | Qualified |
Embodiment 2: the weight proportion of each raw material is:
Carbide slag 84%,, shale 7%, ferriferous raw material 0.5%, hard coal 8.5%.By the cement clinker that the method among the embodiment 1 prepares on the machine shaft kiln, its mechanical property sees Table four, and its Chemical Composition and mineral composition see Table five:
Table four: the mechanical property of machine shaft kiln clinker
| Time of coagulation min | Ultimate compression strength Mpa | Folding strength Mpa | Stability | |||
| Initial set | Final set | 3 days | 28 days | 3 days | 28 days | Boil and boil |
| 135 | 205 | 28 | 64 | 6.5 | 8.5 | Qualified |
Table five: the Chemical Composition of machine shaft kiln clinker and mineral composition
| Mineral composition | Chemical Composition | |||||||||
| C 3S | C 2S | C 3A | C 4AF | LOSS | CaO | SiO 2 | AL 2O 3 | Fe 2O 3 | SO 3 | MgO |
| 49.01 | 17.24 | 11.15 | 12.25 | 0.15 | 65.21 | 23.51 | 6.15 | 2.04 | 1.42 | 1.15 |
It is levigate to 0.08mm square hole sieve＜10% that the kiln discharge grog adds mixing materials such as a certain proportion of gypsum and slag, can produce the qualified cement of different varieties, the physicals such as the table six of its cement:
Table six: the mechanical property of machine shaft kiln cement (P.O32.5)
| Time of coagulation min | Ultimate compression strength Mpa | Folding strength Mpa | Stability | |||
| Initial set | Final set | 3 days | 28 days | 3 days | 28 days | Boil and boil |
| 215 | 231 | 19 | 43.5 | 4.6 | 8.6 | Qualified |
Embodiment 3: the weight proportion of each raw material is: carbide slag 75%, shale 8%, ferriferous raw material 5%, hard coal 12%.See Table seven by the method among the embodiment 1 in the mechanical property of the cement clinker of machine shaft kiln preparation, its Chemical Composition and mineral composition see Table eight:
Table seven: the mechanical property of machine shaft kiln clinker
| Time of coagulation min | Ultimate compression strength Mpa | Folding strength Mpa | Stability | |||
| Initial set | Final set | 3 days | 28 days | 3 days | 28 days | Boil and boil |
| 154 | 178 | 25 | 62 | 4.5 | 8.5 | Qualified |
Table eight: the Chemical Composition of machine shaft kiln clinker and mineral composition
| Mineral composition | Chemical Composition | |||||||||
| C 3S | C 2S | C 3A | C 4AF | LOSS | CaO | SiO 2 | AL 2O 3 | Fe 2O 3 | SO 3 | MgO |
| 51.21 | 15.51 | 12.64 | 10.75 | 0.15 | 62.71 | 18.94 | 8.47 | 2.54 | 1.58 | 0.98 |
It is levigate to 0.08mm square hole sieve＜10% that the kiln discharge grog adds mixing materials such as a certain proportion of gypsum and slag, can produce the qualified cement of different varieties, the physicals such as the table nine of its cement:
Table nine: the mechanical property of machine shaft kiln cement (P.O32.5)
| Time of coagulation min | Ultimate compression strength Mpa | Folding strength Mpa | Stability | |||
| Initial set | Final set | 3 days | 28 days | 3 days | 28 days | Boil and boil |
| 124 | 235 | 22 | 47.6 | 5.5 | 8.7 | Qualified |
Claims (5)
1, a kind of using full calcium carbide slag to instead limestone batching incinerating cement clinker on the machine shaft kiln is characterized in that comprising the mineral composition of following weight percent:
C
3S 48～65
C
2S 15～25
C
3A 6.5～12.5
C
4AF 8～16
2, a kind of method for preparing the described cement clinker of claim 1 is characterized in that carrying out as follows:
(A) composition preparation raw material as following weight percent:
Carbide slag 73-84%
Sal raw material 7-15%
Ferriferous raw material 0.5-5.5%
Hard coal 8-16%
(B) raw material described in (A) are dried to moisture content less than after 15%, combined grinding to 0.080mm square hole sieve tails over and is no more than 18% raw material powder, this raw material powder is gone into balling-up in the pan-pelletizer after stirring, wherein the pellet particle diameter is Φ 5-Φ 15mm, then pellet is gone into the kiln calcining, klining becomes temperature to be controlled at 1400 ± 50 ℃, is 5～10 minutes in the high-temperature zone residence time, promptly gets cement clinker after the cooling.
3, the preparation method of cement clinker according to claim 2, the calcium oxide content that it is characterized in that described carbide slag is 56-70%, water content is 15～25%.
4, the preparation method of cement clinker according to claim 2 is characterized in that described sal raw material is the Page rock and the mineral of deriving thereof.
5, the preparation method of cement clinker according to claim 2 is characterized in that described ferriferous raw material is sulfate slag or iron ore powder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100205079A CN100339329C (en) | 2006-03-17 | 2006-03-17 | Cement clinker calcinated on vertical kiln using full calcium carbide slag to instead limestone and its preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100205079A CN100339329C (en) | 2006-03-17 | 2006-03-17 | Cement clinker calcinated on vertical kiln using full calcium carbide slag to instead limestone and its preparation method |
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| Publication Number | Publication Date |
|---|---|
| CN1830866A true CN1830866A (en) | 2006-09-13 |
| CN100339329C CN100339329C (en) | 2007-09-26 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496867A (en) * | 2013-10-08 | 2014-01-08 | 中国建筑材料科学研究总院 | Calcium sulphoaluminate or calcium sulphoaluminate-calcium oxide concrete expanding agents as well as preparation method and application thereof |
| CN105271851A (en) * | 2015-11-12 | 2016-01-27 | 中国建筑材料科学研究总院 | Alinite cement and preparation method thereof |
| CN110156356A (en) * | 2019-03-28 | 2019-08-23 | 福建鼎盛元环保科技有限公司 | A kind of production line and its technique preparing high alumina cement using white clay |
| CN110615655A (en) * | 2019-10-15 | 2019-12-27 | 东南大学 | Special curing agent for low-strength cured soil and preparation method thereof |
| CN113416042A (en) * | 2021-07-15 | 2021-09-21 | 龙南县彩艺装饰材料厂 | Dry-mixed thin layer masonry mortar |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091432C (en) * | 1999-11-18 | 2002-09-25 | 魏仁涛 | Technological process and subsidiary equipment for cement production in vertical kiln with directly added garbage |
-
2006
- 2006-03-17 CN CNB2006100205079A patent/CN100339329C/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496867A (en) * | 2013-10-08 | 2014-01-08 | 中国建筑材料科学研究总院 | Calcium sulphoaluminate or calcium sulphoaluminate-calcium oxide concrete expanding agents as well as preparation method and application thereof |
| CN103496867B (en) * | 2013-10-08 | 2016-02-17 | 中国建筑材料科学研究总院 | A kind of calcium sulphoaluminate or calcium sulphoaluminate-calcium oxide cement expansive material and preparation method thereof and application |
| CN105271851A (en) * | 2015-11-12 | 2016-01-27 | 中国建筑材料科学研究总院 | Alinite cement and preparation method thereof |
| CN110156356A (en) * | 2019-03-28 | 2019-08-23 | 福建鼎盛元环保科技有限公司 | A kind of production line and its technique preparing high alumina cement using white clay |
| CN110615655A (en) * | 2019-10-15 | 2019-12-27 | 东南大学 | Special curing agent for low-strength cured soil and preparation method thereof |
| CN113416042A (en) * | 2021-07-15 | 2021-09-21 | 龙南县彩艺装饰材料厂 | Dry-mixed thin layer masonry mortar |
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| Publication number | Publication date |
|---|---|
| CN100339329C (en) | 2007-09-26 |
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Owner name: YIBIN TIANYUAN GROUP CO., LTD.; SICHUAN JIULONG CE Free format text: FORMER NAME OR ADDRESS: YIBIN TIANYUAN CO., LTD.; SICHUAN JIULONG CEMENT CO., LTD. |
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Address after: Lower Jiangbei, Yibin City, Sichuan Province: 644004 Co-patentee after: Sichuan Jiulong Cement Co., Ltd. Patentee after: Yibin Tianyuan Group Limited by Share Ltd Address before: Lower Jiangbei, Yibin City, Sichuan Province: 644000 Co-patentee before: Sichuan Jiulong Cement Co., Ltd. Patentee before: Yibin Tianyuan Limited by Share Ltd |