CN115724602B - Low-carbon multi-element cement clinker capable of efficiently utilizing high-magnesium limestone and preparation method thereof - Google Patents
Low-carbon multi-element cement clinker capable of efficiently utilizing high-magnesium limestone and preparation method thereof Download PDFInfo
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- CN115724602B CN115724602B CN202211450001.7A CN202211450001A CN115724602B CN 115724602 B CN115724602 B CN 115724602B CN 202211450001 A CN202211450001 A CN 202211450001A CN 115724602 B CN115724602 B CN 115724602B
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- 239000004568 cement Substances 0.000 title claims abstract description 30
- 235000019738 Limestone Nutrition 0.000 title claims abstract description 19
- 239000006028 limestone Substances 0.000 title claims abstract description 19
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 17
- 239000011777 magnesium Substances 0.000 title claims abstract description 17
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 9
- 239000011707 mineral Substances 0.000 claims abstract description 9
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims description 13
- 238000001354 calcination Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 229910001570 bauxite Inorganic materials 0.000 claims description 3
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010802 sludge Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 238000007873 sieving Methods 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 8
- 239000011575 calcium Substances 0.000 abstract description 8
- 229910052791 calcium Inorganic materials 0.000 abstract description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000395 magnesium oxide Substances 0.000 abstract description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 4
- 235000012241 calcium silicate Nutrition 0.000 abstract description 4
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052918 calcium silicate Inorganic materials 0.000 abstract description 4
- MKTRXTLKNXLULX-UHFFFAOYSA-P pentacalcium;dioxido(oxo)silane;hydron;tetrahydrate Chemical compound [H+].[H+].O.O.O.O.[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O MKTRXTLKNXLULX-UHFFFAOYSA-P 0.000 abstract description 4
- 229910052596 spinel Inorganic materials 0.000 abstract description 4
- 239000011029 spinel Substances 0.000 abstract description 4
- 239000004566 building material Substances 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000002910 solid waste Substances 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
Abstract
The present invention belongs to cement building materialThe field relates to a solid waste recycling technology, in particular to a low-carbon multi-element cement clinker capable of efficiently utilizing high-magnesium limestone and a preparation method thereof. Clinker mineral composition of the cement clinker: dicalcium silicate (C) 2 S): 30-50%, calcium sulfoaluminate (C) 4 A 3 $): 15-40%, calcium sulfosilicate (C) 5 S 2 $): 5-10%, Q phase (C) 6 A 4 MS): 1-15% of magnesia alumina spinel (MA): 1-6%, iron phase (C) 4 AF): 10-20%, white tobermorite (C) 7 MS 4 ): 1-3%. The invention effectively solves the resource utilization problem of high-magnesium limestone and other wastes, and the produced low-carbon multi-element cement clinker has high strength, meets the requirements of green low-carbon development of the current building material industry, has certain economic benefit and huge market potential.
Description
Technical Field
The invention belongs to the field of cement building materials, relates to a solid waste recycling technology, and in particular relates to a low-carbon multi-element cement clinker capable of efficiently utilizing high-magnesium limestone and a preparation method thereof.
Background
In recent years, the rapid development of socioeconomic performance has prompted a great increase in demand for cement, so that various raw materials for cement are increasingly in shortage in some areas. In order to maximize and rationally utilize the existing cement mine resources, not only can the sustainable supply of cement raw materials be maintained, but also the cost of the raw materials can be reduced, and the importance and reasonable use of low-grade limestone have important practical significance in cement production.
Compared with common limestone, in the high-magnesium limestone, the content of calcium oxide is lower, the content of magnesium oxide is higher, the cement prepared by taking the high-magnesium limestone as a raw material cannot meet the requirement of the corresponding standard on the content of magnesium oxide of less than 6%, and the magnesium oxide with the excessive content also reduces the combustibility of cement clinker, increases the production energy consumption and obviously reduces the strength of clinker 28 d.
Disclosure of Invention
Aiming at the problems of low utilization rate of high-magnesium limestone and the like in the prior art, the invention provides the low-carbon multi-element cement clinker capable of efficiently utilizing the high-magnesium limestone.
The invention also provides a preparation method of the low-carbon multi-element cement clinker by efficiently utilizing the high-magnesium limestone.
In order to achieve the above purpose, the specific technical scheme of the invention is as follows:
the invention provides a low-carbon multi-element cement clinker with high-efficiency utilization of high-magnesium limestone, which consists of clinker minerals with the following mass percentages: c (C) 2 S：30-50%，C 4 A 3 $：15-40%，C 5 S 2 $：5-10%，C 6 A 4 MS：1-15%，MA：1-6%，C 4 AF：10-20%，C 7 MS 4 ：1-3%。
Further, the raw material ratio of the cement clinker is as follows: 9.5-18.2 parts of red mud, 4.1-8.8 parts of phosphogypsum, 46-87.5 parts of high-magnesium limestone, 11.9-17.3 parts of gold tailings, 4.2-28.9 parts of low-grade bauxite and 0.5-2 parts of boric sludge.
Further, the raw meal of the cement clinker comprises the following oxide compositions in percentage: caO:30.3-59.8%, A1 2 O 3 ：7.4-25.4%，SO 3 ：1.9-4.5%，Fe 2 O 3 ：3.3-6.6%，SiO 2 ：11.8-20.7%，MgO：0.1-1.2%，B 2 O 3 ：0.2-0.5%。
The invention also provides a preparation method of the low-carbon multi-element cement clinker, which is characterized in that the cement clinker is prepared by calcining raw materials at a high temperature, the calcining temperature is 1250-1400 ℃, and the heat preservation time is 2 hours.
The preparation method provided by the invention comprises the following specific steps: weighing raw materials according to the proportion of minerals, sieving, stirring by using a ball mill, drying, preparing samples, putting into a low-temperature oven for drying, and then calcining at high temperature.
The beneficial effects of the invention are as follows: the invention calcines the high-magnesium limestone with low utilization degree at present and other industrial wastes according to a certain proportion to obtain the low-carbon multi-element cement clinker, which not only effectively solves the recycling problem of the high-magnesium limestone and other wastes, but also generates the low-carbon multi-element cement clinker with high strength, meets the requirements of green low-carbon development of the building material industry at present, and has certain economic benefit and huge market potential.
Detailed Description
The technical scheme of the invention is further explained and illustrated by the specific embodiments.
The experimental raw materials adopted by the invention comprise red mud, phosphogypsum, high-magnesium limestone, gold tailings, low-grade bauxite and boric sludge. The composition is shown in Table 1.
Table 1 experimental materials
Example 1
The weight percentages of the clinker minerals are as follows:
dicalcium silicate 37.5%
27.2% of calcium sulfoaluminate
Calcium sulfosilicate 6.4%
Q phase 9.7%
Magnesia-alumina spinel 2.6%
15.5% of iron phase
Tobermorite 1.1%.
Example 2
The weight percentages of the clinker minerals are as follows:
dicalcium silicate 40.1%
30.7% of calcium sulfoaluminate
Calcium sulfosilicate 7.1%
Q phase 7.7%
Magnesia-alumina spinel 1.8%
Iron phase 11.3%
1.3% of tobermorite.
Example 3
The weight percentages of the clinker minerals are as follows:
dicalcium silicate 35.2%
22.7% of calcium sulfoaluminate
Calcium sulfosilicate 8.5%
Q phase 11.2%
Magnesia-alumina spinel 3.1%
Iron phase 17.7%
1.6% of tobermorite.
200g of the raw materials in examples 1-3 are calculated according to the mineral proportion and weighed, the granularity is that of passing through a standard sieve with 200 meshes, and the screen residue is 6-10%. And then stirring by using a ball mill, drying and preparing a sample. The sample is a cake-shaped sample with the diameter of 40mm, the sample is put into a low-temperature oven for drying, then is put into a high-temperature calciner for sintering at 1350 ℃, is kept for 2 hours, and is taken out and quenched to obtain cement clinker.
Effect examples
The clinker and the steel balls are put into a ball milling tank to be milled to a certain fineness, and are sieved by a 200-mesh sieve, and the screen residue is controlled to be 0.2% -0.5%. The die adopts 2X 2cm 3 Molding, curing for 24h in a room temperature curing room for demoulding, putting the samples prepared under the conditions of each example and comparative example into a curing box, respectively curing for 3d, 7d and 28d under the standard conditions of constant temperature and constant humidity, and then respectively carrying out compressive strength test, wherein the specific results are shown in Table 2.
Table 2 mechanical properties of samples of examples at different ages
Claims (3)
1. The low-carbon multi-element cement clinker with high-efficiency utilization of high-magnesium limestone is characterized by comprising clinker minerals in the following mass percent: c (C) 2 S：30-50%，C 4 A 3 $：15-40%，C 5 S 2 $：5-10%，C 6 A 4 MS：1-15%，MA：1-6%，C 4 AF：10-20%，C 7 MS 4 ：1-3%；
The raw material ratio of the cement clinker is as follows: 9.5-18.2 parts of red mud, 4.1-8.8 parts of phosphogypsum, 46-87.5 parts of high-magnesium limestone, 11.9-17.3 parts of gold tailings, 4.2-28.9 parts of low-grade bauxite and 0.5-2 parts of boric sludge;
the raw material of the cement clinker comprises the following oxide components in percentage: caO:30.3-59.8%, A1 2 O 3 ：7.4-25.4%，SO 3 ：1.9-4.5%，Fe 2 O 3 ：3.3-6.6%，SiO 2 ：11.8-20.7%，MgO：0.1-1.2%，B 2 O 3 ：0.2-0.5%。
2. The method for preparing the low-carbon multi-element cement clinker according to claim 1, wherein the cement clinker is prepared by calcining raw materials at a high temperature, the calcining temperature is 1250-1400 ℃, and the heat preservation time is 2 hours.
3. The preparation method according to claim 2, characterized by the specific steps of: weighing raw materials according to the proportion of minerals, sieving, stirring by using a ball mill, drying, preparing samples, putting into a low-temperature oven for drying, and then calcining at high temperature.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211450001.7A CN115724602B (en) | 2022-11-19 | 2022-11-19 | Low-carbon multi-element cement clinker capable of efficiently utilizing high-magnesium limestone and preparation method thereof |
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|---|---|---|---|
| CN202211450001.7A CN115724602B (en) | 2022-11-19 | 2022-11-19 | Low-carbon multi-element cement clinker capable of efficiently utilizing high-magnesium limestone and preparation method thereof |
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| Publication Number | Publication Date |
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| CN115724602A CN115724602A (en) | 2023-03-03 |
| CN115724602B true CN115724602B (en) | 2023-10-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116553841B (en) * | 2023-04-18 | 2024-05-07 | 河南理工大学 | Carbon-cured low-calcium high-magnesium clinker and preparation method and application thereof |
| CN116553842A (en) * | 2023-04-24 | 2023-08-08 | 华新水泥股份有限公司 | High-magnesium low-carbon cement clinker and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105669056A (en) * | 2016-01-19 | 2016-06-15 | 北京建筑材料科学研究总院有限公司 | Low-carbon cement clinker and preparation method and application thereof |
| CN112723767A (en) * | 2021-02-03 | 2021-04-30 | 济南大学 | Q-phase-containing belite sulphoaluminate cement efficiently utilizing gold tailings and preparation method thereof |
| CN113772976A (en) * | 2021-09-29 | 2021-12-10 | 齐鲁工业大学 | Sulphoaluminate-magnesium aluminate spinel cementing material, preparation method, system and application |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105669056A (en) * | 2016-01-19 | 2016-06-15 | 北京建筑材料科学研究总院有限公司 | Low-carbon cement clinker and preparation method and application thereof |
| CN112723767A (en) * | 2021-02-03 | 2021-04-30 | 济南大学 | Q-phase-containing belite sulphoaluminate cement efficiently utilizing gold tailings and preparation method thereof |
| CN113772976A (en) * | 2021-09-29 | 2021-12-10 | 齐鲁工业大学 | Sulphoaluminate-magnesium aluminate spinel cementing material, preparation method, system and application |
Non-Patent Citations (1)
| Title |
|---|
| 张琼琼等.SO3 和H3BO3 对高镁熟料中方镁石含量和C2S 晶型的影响.新型建筑材料.2017,第44卷(第3期),第101-105页. * |
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