CN115724602A - Low-carbon multi-element cement clinker for efficiently utilizing high-magnesium limestone and preparation method thereof - Google Patents
Low-carbon multi-element cement clinker for efficiently utilizing high-magnesium limestone and preparation method thereof Download PDFInfo
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- CN115724602A CN115724602A CN202211450001.7A CN202211450001A CN115724602A CN 115724602 A CN115724602 A CN 115724602A CN 202211450001 A CN202211450001 A CN 202211450001A CN 115724602 A CN115724602 A CN 115724602A
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- cement clinker
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- carbon multi
- clinker
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- 239000004568 cement Substances 0.000 title claims abstract description 33
- 235000019738 Limestone Nutrition 0.000 title claims abstract description 19
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 19
- 239000006028 limestone Substances 0.000 title claims abstract description 19
- 239000011777 magnesium Substances 0.000 title claims abstract description 18
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 18
- 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
- 239000000203 mixture Substances 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
- 238000004519 manufacturing process Methods 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
- 238000007873 sieving Methods 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 235000012054 meals Nutrition 0.000 claims 2
- 238000003837 high-temperature calcination Methods 0.000 claims 1
- 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
- 239000004566 building material Substances 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
- CVPJXKJISAFJDU-UHFFFAOYSA-A nonacalcium;magnesium;hydrogen phosphate;iron(2+);hexaphosphate Chemical compound [Mg+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Fe+2].OP([O-])([O-])=O.OP([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O CVPJXKJISAFJDU-UHFFFAOYSA-A 0.000 abstract description 4
- 229910052596 spinel Inorganic materials 0.000 abstract description 4
- 239000011029 spinel Substances 0.000 abstract description 4
- 229910052591 whitlockite Inorganic materials 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000002910 solid waste Substances 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- -1 magnesium aluminate Chemical class 0.000 abstract 1
- 239000000395 magnesium oxide Substances 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 3
- 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
- 238000004321 preservation 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 invention belongs to the field of cement building materials, relates to a solid waste recycling technology, and particularly relates to a low-carbon multi-element cement clinker efficiently utilizing high-magnesium limestone and a preparation method thereof. The clinker mineral composition of the cement clinker is as follows: dicalcium silicate (C) 2 S): 30-50% of calcium sulphoaluminate (C) 4 A 3 $ h): 15-40% of calcium sulfosilicate (C) 5 S 2 $ h): 5-10%, Q phase (C) 6 A 4 MS): 1-15%, magnesium aluminate spinel (MA): 1-6% of iron phase (C) 4 AF): 10-20%, whitlockite (C) 7 MS 4 ): 1 to 3 percent. The invention effectively solves the problem of resource utilization of high-magnesium limestone and other wastes, and the generated low-carbon multi-element cement clinker has high strength, meets the requirement of green low-carbon development of the current building material industry, has certain economic benefit and has huge market potential.
Description
Technical Field
The invention belongs to the field of cement building materials, relates to a solid waste recycling technology, and particularly relates to a low-carbon multi-element cement clinker efficiently utilizing high-magnesium limestone and a preparation method thereof.
Background
In recent years, rapid development of socioeconomic properties has led to a great increase in the demand for cement, resulting in an increasing shortage of various raw materials for cement in some regions. In order to maximize and reasonably utilize the existing cement mine resources, not only can the sustainable supply of the cement raw materials be maintained, but also the cost of the raw materials can be reduced, and the attention and reasonable use of low-grade limestone have important practical significance in cement production.
Compared with common limestone, the high-magnesium limestone contains low content of calcium oxide and high content of magnesium oxide, the cement prepared by using the high-magnesium limestone as a raw material cannot meet the requirement that the content of magnesium oxide is less than 6% in the corresponding standard, and the high content of magnesium oxide can reduce the easy burning property of cement clinker, increase the production energy consumption and obviously reduce the 28d strength of the clinker.
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 a low-carbon multi-element cement clinker which efficiently utilizes 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 purpose, the specific technical scheme of the invention is as follows:
the invention provides a low-carbon multi-element cement clinker for efficiently utilizing high-magnesium limestone, which consists of the following clinker minerals in percentage by mass: 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 mixture 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 material of the cement clinker comprises the following oxides 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 the raw materials at high temperature, wherein 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 the raw materials according to the mineral proportion, sieving, stirring by using a ball mill, drying, preparing a sample, 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 various industrial wastes according to a certain proportion to form the low-carbon multi-component cement clinker, thereby not only effectively solving the resource utilization problem of the high-magnesium limestone and other wastes, but also ensuring that the generated low-carbon multi-component cement clinker has high strength, meets the requirement of green and low-carbon development of the current building material industry, has certain economic benefit and has huge market potential.
Detailed Description
The technical solution of the present invention is further explained and illustrated by the following 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 percentage of clinker minerals is as follows:
dicalcium silicate 37.5%
27.2 percent of calcium sulphoaluminate
Calcium sulfosilicate 6.4%
Phase Q9.7%
2.6 percent of magnesia-alumina spinel
15.5 percent of iron phase
1.1 percent of whitlockite.
Example 2
The weight percentage of clinker minerals is as follows:
40.1 percent of dicalcium silicate
30.7 percent of calcium sulphoaluminate
Calcium sulfosilicate 7.1%
Phase Q is 7.7%
1.8 percent of magnesia-alumina spinel
11.3 percent of iron phase
1.3 percent of whitlockite.
Example 3
The weight percentage of clinker minerals is as follows:
35.2 percent of dicalcium silicate
22.7 percent of calcium sulphoaluminate
Calcium sulfosilicate 8.5%
11.2% of phase Q
3.1 percent of magnesia-alumina spinel
17.7 percent of iron phase
1.6 percent of whitlockite.
The raw materials of the examples 1-3 are calculated and weighed according to the mineral proportion, the granularity is that the raw materials pass through a standard sieve of 200 meshes, and the residue on sieve is 6-10%. Then stirring by a ball mill, drying and preparing a sample. The sample is a round cake-shaped sample with the diameter of 40mm, the round cake-shaped sample is placed into a low-temperature oven for drying, then the round cake-shaped sample is placed into a high-temperature calcining furnace for calcining at 1350 ℃, the temperature is kept for 2 hours, and the round cake-shaped sample is taken out and then is quenched to obtain the cement clinker.
Effects of the embodiment
The clinker and the steel ball are put into a ball milling tank to be milled to a certain fineness and are sieved by a 200-mesh sieve, and the residue on the sieve is controlled to be 0.2-0.5%. The mold is 2X 2cm 3 And (3) forming, wherein the water-cement ratio is 0.35, curing in a room-temperature curing chamber for 24h, demolding, putting the samples prepared in the conditions of the examples and the comparative examples into a curing box, curing for 3d, 7d and 28d respectively 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 of different ages
Claims (5)
1. A low-carbon multi-element cement clinker for efficiently utilizing high-magnesium limestone is characterized by comprising the following components in percentage by massThe clinker mineral composition is as follows: 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%。
2. The low-carbon multi-element cement clinker of claim 1, wherein the raw material mixture 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.
3. The low-carbon multi-element cement clinker according to claim 1 or 2, wherein the cement clinker has a raw meal with an oxide percentage composition of: 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%。
4. A method for the production of a low-carbon multi-element cement clinker as claimed in any one of claims 1 to 3, wherein said cement clinker is produced by high temperature calcination of raw meal at 1250-1400 ℃ for 2h.
5. The preparation method according to claim 4, comprising the following specific steps: weighing the raw materials according to the mineral proportion, sieving, stirring by using a ball mill, drying, preparing a sample, putting into a low-temperature oven for drying, and then calcining at high temperature.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115724602A true CN115724602A (en) | 2023-03-03 |
| CN115724602B CN115724602B (en) | 2023-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211450001.7A Active 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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| CN (1) | CN115724602B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116553841A (en) * | 2023-04-18 | 2023-08-08 | 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 |
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|---|---|---|---|---|
| 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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- 2022-11-19 CN CN202211450001.7A patent/CN115724602B/en active Active
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, vol. 44, no. 3, pages 101 - 105 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116553841A (en) * | 2023-04-18 | 2023-08-08 | 河南理工大学 | Carbon-cured low-calcium high-magnesium clinker and preparation method and application thereof |
| 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 |
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| CN115724602B (en) | 2023-10-24 |
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