CN114702258A - Raw material proportioning process - Google Patents
Raw material proportioning process Download PDFInfo
- Publication number
- CN114702258A CN114702258A CN202210410048.4A CN202210410048A CN114702258A CN 114702258 A CN114702258 A CN 114702258A CN 202210410048 A CN202210410048 A CN 202210410048A CN 114702258 A CN114702258 A CN 114702258A
- Authority
- CN
- China
- Prior art keywords
- low
- raw material
- grade
- cement
- compressive strength
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002994 raw material Substances 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000008569 process Effects 0.000 title claims abstract description 23
- 239000004568 cement Substances 0.000 claims abstract description 36
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 25
- 239000000126 substance Substances 0.000 claims description 15
- 238000000227 grinding Methods 0.000 claims description 10
- 238000007689 inspection Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 7
- 238000001354 calcination Methods 0.000 claims description 6
- 238000000265 homogenisation Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- 235000012054 meals Nutrition 0.000 claims 3
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
- C04B7/36—Manufacture of hydraulic cements in general
-
- 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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
-
- 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
The invention discloses a novel raw material proportioning process, which mainly relates to the technical field of raw material proportioning processes in novel dry-method cement production. The invention uses low-grade bauxite as the aluminum raw material to optimize the batching scheme and uses the batching scheme in the novel dry cement production, solves the problem of occupying area of the peripheral low-grade bauxite, reduces the production cost of cement enterprises, does not cause new pollution, manufactures new pollution sources, and has obvious energy-saving and environmental-protection benefits.
Description
Technical Field
The invention relates to a raw material proportioning process in novel dry cement production, in particular to a novel raw material proportioning process.
Background
The raw material ingredients in the novel dry method cement production generally use limestone, siliceous raw materials, aluminum raw materials and iron raw materials, the aluminum raw materials of cement enterprises generally use bauxite, and cement enterprises in various places use high-grade bauxite with higher aluminum content for pursuing the quality of clinker.
The method has the advantages that low-grade bauxite which is unwilling to be used by some cement enterprises exists in the market, a supplier excavates and sells the high-grade bauxite, then conducts waste treatment on the low-grade bauxite, piles up the low-grade bauxite at will, occupies valuable land resources, seriously influences the local environment, and discovers that the aluminum content of the waste low-grade bauxite is lower and only about 13 percent, but the silicon content of the waste low-grade bauxite is about 70 percent through multiple tests.
The cement process flow comprises raw material crushing, raw material pre-homogenization, raw material blending, clinker calcination and cement preparation. In the cement production process, raw material proportioning is an extremely important link, which not only restricts the yield of clinker, but also influences the calcination quality of cement clinker and even the quality of factory cement.
Disclosure of Invention
The invention provides a novel raw material proportioning process, which solves the technical problems mentioned in the background technology.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method comprises the following steps:
(1) mixing Al2O3The content is 10 to 14 percent, and SiO is2Low-grade bauxite with the content of 67-72 percent is subjected to homogenization and harmless treatment and then ground to form raw material;
(2) calculating a batching scheme according to chemical components of the raw materials:
according to the chemical components and the index of the three-rate value of the low-grade alumina, the wet basis proportion range of the low-grade alumina is calculated to be 12.1-17.8 percent, and the wet basis proportion of the sandstone is less than or equal to 2 percent;
(3) grinding raw material powder according to a batching scheme:
the method comprises the following steps of (1) after preliminary pre-homogenizing low-grade bauxite in a raw material yard, feeding the low-grade bauxite into an aluminum raw material bin through a plate feeding machine port and a belt weigher, carrying out secondary homogenizing in the aluminum raw material bin, and then feeding the low-grade bauxite into a roller press through the belt weigher according to a batching scheme to grind raw materials, wherein in the grinding process of the raw materials, a three-rate value index is normal and has no obvious fluctuation;
(4) the production line carries out trial production;
(5) performing quality inspection on the clinker fired in the test production, and performing cement grinding after the qualified clinker is ensured:
in the process of trying the low-grade alumina, the cement clinker is prepared by using a novel original dry cement calcination process, and the compressive strength of the clinker calcined by using the low-grade alumina has little change compared with that of the clinker calcined by using the original material scheme;
(6) and carrying out quality inspection on the physical and chemical properties of the prepared cement.
Preferably, the main chemical components of the low-grade alumina in the step (1) are as follows:
preferably, the strength in step (5) is compressive strength, and includes 3d compressive strength and 28d compressive strength, as follows:
scheme 3d compressive Strength (MPa) 28d compressive Strength (MPa)
Normal alumina 30.455.3
Low grade alumina 30.555.0
Preferably, the physicochemical property quality test items in the step (6) include strength, consistency, fineness, fluidity, setting time, MgO content, SO3Content and Cl-content.
The invention adopts the structure and has the following advantages:
1. the low-grade bauxite is used as an aluminum raw material to optimize a batching scheme and is used in the novel dry cement production, the problem of occupied area of the peripheral low-grade bauxite is solved, the production cost of cement enterprises is reduced, new pollution cannot be caused, a new pollution source is manufactured, and obvious energy-saving and environment-friendly benefits are achieved;
2. meanwhile, SiO in the aluminum raw material2The content of the additive can supplement siliceous correction raw materials, reduce the application of the siliceous raw materials, reduce the mining intensity of sandstone ores, protect the environment, is more economic than the traditional raw materials, opens up a new path for comprehensive utilization of resources and indicates a new direction of green development of cement.
Drawings
Fig. 1 is a block diagram of the overall process of raw material batching for novel dry cement.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings.
Example one
As shown in figure 1, on the basis of the original preparation process of raw materials of novel dry-process cement, the invention applies low-grade alumina as an aluminum raw material to the preparation of the raw materials of the novel dry-process cement production:
the whole process comprises the following steps:
(1) mixing Al2O3The content is 10 to 14 percent, and SiO is2Low-grade bauxite with the content of 67-72 percent is subjected to homogenization and harmless treatment and then ground to form raw material;
(2) calculating a batching scheme according to chemical components of the raw materials:
according to the chemical components and the index of the three-rate value of the low-grade alumina, the wet basis proportion range of the low-grade alumina is calculated to be 12.1-17.8 percent, and the wet basis proportion of the sandstone is less than or equal to 2 percent;
(3) grinding raw material powder according to a batching scheme:
the method comprises the following steps of (1) after preliminary pre-homogenizing low-grade bauxite in a raw material yard, feeding the low-grade bauxite into an aluminum raw material bin through a plate feeding machine port and a belt weigher, carrying out secondary homogenizing in the aluminum raw material bin, and then feeding the low-grade bauxite into a roller press through the belt weigher according to a batching scheme to grind raw materials, wherein in the grinding process of the raw materials, a three-rate value index is normal and has no obvious fluctuation;
(5) the first production line carries out test production;
(5) performing quality inspection on the clinker fired in the test production, and performing cement grinding after the qualified clinker is ensured:
in the process of trying the low-grade alumina, the cement clinker is prepared by using a novel original dry cement calcination process, and the compressive strength of the clinker calcined by using the low-grade alumina has little change compared with that of the clinker calcined by using the original material scheme;
(6) and carrying out quality inspection on the physical and chemical properties of the prepared cement.
Preferably, the main chemical components of the low-grade alumina in the step (1) are as follows:
preferably, the strength in step (5) is compressive strength, and includes 3d compressive strength and 28d compressive strength, as follows:
protocol 3d compressive Strength (MPa) 28d compressive Strength (MPa)
Normal alumina 30.455.3
Low grade alumina 30.555.0
Preferably, the physicochemical property quality test items in the step (6) include strength, consistency, fineness, fluidity, setting time, MgO content, SO3Content and Cl-content.
Before production, the sufficient low-grade bauxite amount is firstly ensured to be stored in a storage yard, and then the chemical component analysis is carried out on the low-grade bauxite to ensure Al in the low-grade bauxite2O3Content and SiO2The content is in the range of meeting the requirement, after the low-grade bauxite meeting the content range in step (1) is homogenized and innocent treated, can meet the normal grinding requirement of raw materials, in step (2), the batching scheme calculated according to the chemical composition of each raw material compares with original batching scheme, reduce the consumption of sandstone, has reduced the exploitation to sandstone ore, in step (4), the whole cement preparation system is normal, the thermodynamic system is stable, use the batching of low-grade bauxite and does not influence the clinker calcination, in step (6), carry on the quality inspection to the cement made, expand the use scale after guaranteeing the performance requirement of raw materials is qualified, cement prepared with low-grade bauxite uses each physical and chemical property such as intensity, consistency, fineness, fluidity, setting time, MgO content, SO to expand the use scale3The content and the Cl-content are in reasonable ranges, and the daily production of cement enterprises can be met.
Specific analytical data for each property of the two types of cement are shown in the following table:
the above mentioned devices are prior art.
The above-described embodiments should not be construed as limiting the scope of the invention, and any alternative modifications or alterations to the embodiments of the present invention will be apparent to those skilled in the art.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (4)
1. A novel raw material proportioning process comprises the following steps:
(1) mixing Al2O3The content is 10 to 14 percent, and SiO is2Low-grade bauxite with the content of 67-72 percent is subjected to homogenization and harmless treatment and then ground to form raw material;
(2) calculating a batching scheme according to chemical components of the raw materials:
according to the chemical components and the index of the three-rate value of the low-grade alumina, the wet basis proportion range of the low-grade alumina is calculated to be 12.1-17.8 percent, and the wet basis proportion of the sandstone is less than or equal to 2 percent;
(3) grinding raw materials according to a batching scheme:
the method comprises the following steps of (1) after preliminary pre-homogenizing low-grade bauxite in a raw material yard, feeding the low-grade bauxite into an aluminum raw material bin through a plate feeding machine port and a belt weigher, carrying out secondary homogenizing in the aluminum raw material bin, and then feeding the low-grade bauxite into a roller press through the belt weigher according to a batching scheme to grind raw materials, wherein in the grinding process of the raw materials, a three-rate value index is normal and has no obvious fluctuation;
(4) the production line carries out trial production;
(5) performing quality inspection on the clinker fired in the test production, and performing cement grinding after the qualified clinker is ensured:
in the process of trying the low-grade alumina, the cement clinker is prepared by using a novel original dry cement calcination process, and the compressive strength of the clinker calcined by using the low-grade alumina has little change compared with that of the clinker calcined by using the original material scheme;
(6) and carrying out quality inspection on the physical and chemical properties of the prepared cement.
2. The novel raw meal burdening process according to claim 1, characterized in that: the main chemical components of the low-grade alumina in the step (1) are as follows:
3. the novel raw meal burdening process according to claim 2, characterized in that: the strength in the step (5) is compressive strength, and comprises 3d compressive strength and 28d compressive strength, and is as follows:
protocol 3d compressive Strength (MPa) 28d compressive Strength (MPa)
Normal alumina 30.455.3
Low grade alumina 30.555.0
4. A novel batching process for raw meal as claimed in claim 3, characterized in that: the quality inspection items of physicochemical properties in the step (6) include strength, consistency, fineness, fluidity, setting time, MgO content, SO3Content and Cl-content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210410048.4A CN114702258A (en) | 2022-04-19 | 2022-04-19 | Raw material proportioning process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210410048.4A CN114702258A (en) | 2022-04-19 | 2022-04-19 | Raw material proportioning process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114702258A true CN114702258A (en) | 2022-07-05 |
Family
ID=82174242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210410048.4A Pending CN114702258A (en) | 2022-04-19 | 2022-04-19 | Raw material proportioning process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114702258A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746776A (en) * | 2016-12-09 | 2017-05-31 | 嘉华特种水泥股份有限公司 | Clinker and preparation method thereof |
| CN107555816A (en) * | 2017-09-19 | 2018-01-09 | 山东东华水泥有限公司 | A kind of low-grade bauxite clinker |
| CN109133684A (en) * | 2018-09-10 | 2019-01-04 | 西南科技大学 | A kind of high iron belite aluminate cement clinker and preparation method thereof |
| CN109437623A (en) * | 2018-12-27 | 2019-03-08 | 嘉华特种水泥股份有限公司 | A kind of Portland clinker and preparation method thereof |
-
2022
- 2022-04-19 CN CN202210410048.4A patent/CN114702258A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746776A (en) * | 2016-12-09 | 2017-05-31 | 嘉华特种水泥股份有限公司 | Clinker and preparation method thereof |
| CN107555816A (en) * | 2017-09-19 | 2018-01-09 | 山东东华水泥有限公司 | A kind of low-grade bauxite clinker |
| CN109133684A (en) * | 2018-09-10 | 2019-01-04 | 西南科技大学 | A kind of high iron belite aluminate cement clinker and preparation method thereof |
| CN109437623A (en) * | 2018-12-27 | 2019-03-08 | 嘉华特种水泥股份有限公司 | A kind of Portland clinker and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111205003B (en) | Preparation method of regenerated cementing material | |
| CN104496228A (en) | Road silicate cement clinker and preparation method thereof | |
| CN104150794B (en) | A kind of preparation method of iron tailings portland cement | |
| CN110282991A (en) | A kind of waste and old magnesium aluminate spinel is that raw material prepares the magnesia coating of tundish and method | |
| CN102603248A (en) | Tailing sand mortar dry blend and mortar preparation method thereby | |
| CN108821618B (en) | Utilize the low-calcium silicate cement clinker and preparation method thereof of high alumina lime stone preparation | |
| CN106698986A (en) | Production method of sulfoaluminate cement clinker | |
| CN103130430B (en) | Cement clinker production method by utilization of artificial slabstone waste | |
| CN105314902A (en) | Method for calcining belite sulphoaluminate cement clinker by totally utilizing industrial waste residues | |
| CN113121131B (en) | Cement clinker produced by using low-grade marble limestone and preparation method thereof | |
| CN109824283B (en) | modified mixed portland cement and its preparation method | |
| CN112456830A (en) | Micro-expansion high belite sulphoaluminate cement and production method thereof | |
| CN110963727A (en) | Processing method of aluminate cement blended mixed material | |
| CN111116071A (en) | Copper tailing mineral admixture | |
| CN114477803A (en) | Production method of carbide slag cement | |
| CN114702258A (en) | Raw material proportioning process | |
| CN110228956B (en) | Portland cement clinker with high compressive strength and preparation method thereof | |
| CN109956686A (en) | The processing method of architecture sediment in building castoff | |
| CN110395956B (en) | Iron tailing micro-powder mortar dry powder for building mortar and preparation method thereof | |
| CN109437617B (en) | Preparation process of portland cement clinker | |
| CN101343156B (en) | Method for improving quality of fly ash concrete blending material | |
| CN115925287A (en) | Tungsten-molybdenum-bismuth multi-metal tailing-based cementing material and preparation method and application thereof | |
| CN105293965A (en) | High-performance concrete composite admixture and preparation method thereof | |
| CN106431065B (en) | A kind of flyash modified dose and its modified low-quality flyash activity admixture | |
| CN109439312A (en) | A kind of petroleum fracturing propping agent and production technology and purposes based on Tailings utilization |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220705 |
|
| RJ01 | Rejection of invention patent application after publication |