CN116813222A - Cement raw material prepared from stone slag powder and method for preparing cement clinker by using cement raw material - Google Patents
Cement raw material prepared from stone slag powder and method for preparing cement clinker by using cement raw material Download PDFInfo
- Publication number
- CN116813222A CN116813222A CN202310631112.6A CN202310631112A CN116813222A CN 116813222 A CN116813222 A CN 116813222A CN 202310631112 A CN202310631112 A CN 202310631112A CN 116813222 A CN116813222 A CN 116813222A
- Authority
- CN
- China
- Prior art keywords
- cement
- clinker
- powder
- raw materials
- raw material
- 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
- 239000004568 cement Substances 0.000 title claims abstract description 96
- 239000002994 raw material Substances 0.000 title claims abstract description 68
- 239000000843 powder Substances 0.000 title claims abstract description 45
- 239000002893 slag Substances 0.000 title claims abstract description 33
- 239000004575 stone Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 34
- 235000019738 Limestone Nutrition 0.000 claims abstract description 22
- 239000006028 limestone Substances 0.000 claims abstract description 22
- 239000010459 dolomite Substances 0.000 claims abstract description 11
- 229910000514 dolomite Inorganic materials 0.000 claims abstract description 11
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- 235000012054 meals Nutrition 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 7
- 239000011707 mineral Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 5
- 238000000227 grinding Methods 0.000 claims abstract description 5
- 238000010791 quenching Methods 0.000 claims abstract description 5
- 230000000171 quenching effect Effects 0.000 claims abstract description 5
- 239000000428 dust Substances 0.000 claims description 11
- 238000000265 homogenisation Methods 0.000 claims description 9
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 239000011435 rock Substances 0.000 abstract description 4
- 239000003513 alkali Substances 0.000 description 13
- 239000000203 mixture Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 238000012946 outsourcing Methods 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 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
- 239000003245 coal Substances 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000019976 tricalcium silicate Nutrition 0.000 description 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a cement raw material prepared from stone slag powder and a method for preparing cement clinker by using the cement raw material, wherein the cement raw material comprises the following raw materials in percentage by weight: limestone: 70% -80% of stone slag powder: 10% -15%, iron ore dressing powder: 8% -11%, coal-fired furnace slag: 2% -4%. The method for preparing cement clinker comprises the following steps: mixing the raw materials in proportion, grinding to obtain cement raw materials, and homogenizing and storing the raw materials in a homogenizing warehouse; the raw meal powder is sent into a preheater through conveying equipment for pre-decomposition to obtain semi-clinker; the semi-cooked material enters a rotary kiln, is calcined at high temperature in the rotary kiln, enters a grate cooler for quenching, and is crushed to obtain cement clinker. The invention uses dolomite rock slag powder for cement raw materials, can reduce the cost of cement production, ensures the quality of clinker, is beneficial to the comprehensive utilization of mineral resources and prolongs the service life of mines.
Description
Technical Field
The invention relates to the field of cement production, in particular to a cement raw material prepared from stone slag powder and a method for preparing cement clinker by using the cement raw material.
Background
Cement is an important basic raw material for national economy and occupies the primary place in building material application. Limestone is a main calcareous raw material for cement production, but with continuous exploitation, the limestone resource reserves are smaller and smaller, the quality is increasingly deteriorated, the alkali content is higher, and the quality and the performance of cement clinker are affected. In order to ensure the quality of clinker and improve the cement performance, a plurality of cement enterprises with conventional alkali limestone mines have to purchase high-price low-alkali limestone externally to be matched with self-produced limestone for use, and the production cost is increased along with the quality of cement.
Dolomite has not been effectively applied in the production of cement raw materials because of the high magnesium, and stone slag powder is powder produced in the processing process of dolomite mineral resources, belongs to waste residues, and is characterized by high calcium, high magnesium and low alkali.
Disclosure of Invention
In order to solve the technical problems, the invention provides a cement raw material prepared from dolomite-type slag powder and a method for preparing cement clinker by using the cement raw material.
In a first aspect, the invention provides a cement raw material prepared from stone dust powder, which comprises the following raw materials in percentage by weight:
limestone: 70-80%
Stone slag powder: 10-15%
Iron ore dressing powder: 8-11%
Coal-fired slag: 2% -4%.
Further, the limestone comprises the following components in percentage by weight: caO accounts for 44% -48%, siO 2 The ratio of Al is 6-8 percent 2 O 3 The ratio of Fe is 1.2% -2.3% 2 O 3 0.5-1.0% of the ratio, 1.0-2.0% of MgO, R 2 O accounts for 0.65% -0.85%, wherein R 2 O is the alkali content.
Further, the stone powder comprises the following components in percentage by weight: caO accounts for 42% -44%, siO 2 The ratio of Al is 3% -5% 2 O 3 The ratio of Fe is 1.0% -2.5% 2 O 3 0.5-0.7% of MgO, 10-15% of R 2 The O accounts for 0.4% -0.6%.
Further, the iron ore dressing powder comprises the following components in percentage by weight: caO accounts for 3% -5%, siO 2 60-70% of Al 2 O 3 The ratio of Fe is 1.5% -2.5% 2 O 3 10% -15% of the ratio, 1.5% -3.0% of MgO, and R 2 The O accounts for 0.9% -1.0%.
Further, the coal-fired furnace slag comprises the following components in percentage by weight: caO accounts for 4.0% -6.0%, siO 2 30% -40% of Al 2 O 3 The proportion of Fe is 25% -30% 2 O 3 4.0% -6.0% of the ratio, 0.5% -2.0% of MgO, R 2 The O accounts for 0.7-1.3%.
Further, the rock slag powder is dolomite powder with the particle size of 0-5 mm, and is mineral separation waste residue.
In a second aspect, the present invention also provides a method for preparing cement clinker using the aforementioned cement raw materials, comprising the steps of:
s1, mixing the raw materials in proportion, grinding after mixing to obtain cement raw materials, and placing the raw materials in a homogenization warehouse for homogenization storage;
s2, conveying the homogenized raw meal powder in the step S1 into a preheater through conveying equipment for pre-decomposition to obtain semi-clinker;
s3, feeding the semi-decomposed material obtained in the step S2 into a rotary kiln, calcining at high temperature in the rotary kiln, and then feeding into a grate cooler for quenching and crushing to obtain cement clinker.
Preferably, the temperature in S2 is 850-920 ℃ and the time is 40-60S; and S3, calcining at 1350-1450 ℃ for 30-40 min.
The performance of the prepared cement clinker is detected, and all indexes of the cement clinker reach the national standard, so that the use requirement is met.
KH of cement clinker is 0.88-0.92, SM is 2.45-2.65, IM is 1.45-1.65, R 2 The O content is 0.95-1.15%, the MgO content is not more than 5.0%, and the 28-day compressive strength reaches the national standard.
Wherein KH is the lime saturation coefficient and represents the degree to which silica in cement clinker is saturated with calcium oxide to form tricalcium silicate.
SM is the silicic acid rate and represents the ratio of the silicon dioxide content to the aluminum oxide plus ferric oxide content in the cement clinker.
IM is the alumina rate and represents the ratio of the content of aluminum oxide to the content of ferric oxide in the cement clinker.
The invention has the following beneficial effects:
the invention provides a cement raw material prepared from dolomite rock powder and a method for preparing cement clinker by using the cement raw material.
Detailed Description
The present invention will be described in detail with reference to the following embodiments for a full understanding of the objects, features and effects of the present invention, but the present invention is not limited thereto.
The raw material sources are as follows:
limestone is self-produced in enterprise mines;
stone slag powder is mineral separation waste residue of dolomite;
iron ore dressing powder which is tailings obtained by concentrating iron ore mine ores;
slag generated after the raw coal of the power plant is combusted to generate electricity.
The embodiment of the invention provides a cement raw material prepared from stone slag powder and a method for preparing cement clinker by using the cement raw material, wherein the cement raw material comprises the following raw materials in percentage by weight: 70-80% of limestone, 10-15% of stone slag powder, 8-11% of iron ore dressing powder and 2-4% of coal-fired furnace slag. The cement clinker is produced according to the following steps:
s1, mixing the raw materials in proportion, grinding after mixing to obtain cement raw materials, and placing the raw materials in a homogenization warehouse for homogenization storage;
s2, conveying the homogenized raw meal powder in the step S1 into a preheater through conveying equipment for pre-decomposition to obtain semi-clinker, wherein the temperature is 850-920 ℃ and the time is 40-60S;
and S3, conveying the semi-decomposed material obtained in the step S2 into a rotary kiln, calcining at a high temperature of 1350-1450 ℃ in the rotary kiln for 30-40 min, and then, conveying the calcined material into a grate cooler for quenching and crushing to obtain cement clinker.
Wherein the limestone comprises the following components in percentage by weight: caO accounts for 44% -48%, siO 2 The ratio of Al is 6-8 percent 2 O 3 The ratio of Fe is 1.2% -2.3% 2 O 3 0.5-1.0% of the ratio, 1.0-2.0% of MgO, R 2 The O accounts for 0.65-0.85%. Wherein R is 2 O is the alkali content.
The stone slag powder comprises the following components in percentage by weight: caO accounts for 42% -44%, siO 2 The ratio of Al is 3% -5% 2 O 3 The ratio of Fe is 1.0% -2.5% 2 O 3 0.5-0.7% of MgO, 10-15% of R 2 The O accounts for 0.4% -0.6%. The stone slag powder is dolomite powder with the particle size of 0-5 mm, and is mineral separation waste residue.
Iron ore dressing powderComprises the following components in percentage by weight: caO accounts for 3% -5%, siO 2 60-70% of Al 2 O 3 The ratio of Fe is 1.5% -2.5% 2 O 3 10% -15% of the ratio, 1.5% -3.0% of MgO, and R 2 The O accounts for 0.9% -1.0%.
The coal-fired furnace slag comprises the following components in percentage by weight: caO accounts for 4.0% -6.0%, siO 2 30% -40% of Al 2 O 3 The proportion of Fe is 25% -30% 2 O 3 4.0% -6.0% of the ratio, 0.5% -2.0% of MgO, R 2 The O accounts for 0.7-1.3%.
The percentages of the components of the raw materials are parameters after homogenization.
Example 1
The embodiment provides a cement raw material prepared from stone slag powder and a method for preparing cement clinker by using the cement raw material, wherein the cement raw material comprises the following raw materials in percentage by weight: limestone: 82.5 percent, stone dust: 5%, iron ore dressing powder: 9.5 percent of coal-fired slag: 3.0%. The chemical composition of each raw material is shown in table 1.
TABLE 1 chemical composition of the raw materials of example 1
The method for preparing cement clinker by using the cement raw material comprises the following steps:
s1, mixing the raw materials in proportion, grinding after mixing to obtain cement raw materials, and placing the raw materials in a homogenization warehouse for homogenization storage;
s2, conveying the homogenized raw meal powder in the step S1 into a preheater through conveying equipment, and carrying out pre-decomposition for 60S to 880 ℃ in the preheater to obtain semi-clinker;
s3, delivering the semi-decomposed material obtained in the step S2 into a rotary kiln, calcining at a high temperature of 1450 ℃ for 40min, quenching in a grate cooler, and crushing to obtain cement clinker.
The cement clinker obtained had KH of 0.89, SM of 2.60, IM of 1.60, R 2 The O content is 1.10%, the MgO content is 3.1%, and the 28-day compressive strength of the clinker is 53MPa.
Examples 2 to 6
The chemical composition of each raw material of cement raw materials in examples 2 to 6 is the same as in example 1, and the preparation method of cement clinker is the same as in example 1. The compositions of cement raw materials in examples 2 to 6 are shown in Table 2, and the performance indexes of the cement clinker obtained are shown in Table 3.
The cement raw meal of example 6 contained no stone dust as a comparative reference for the other examples.
Table 2 Cement raw meal compositions of examples 1 to 6
TABLE 3 examples 1-6 Cement clinker Performance index
As can be seen from tables 2 and 3, the dolomite type stone slag powder is used for cement raw materials, the performance of the produced cement meets the national standard, when the addition amount of the stone slag powder is 10-15%, the performance of the cement is optimal, and R in the clinker is R 2 The content of O is not more than 1.10%, the content of MgO is not more than 5%, and the 28-day compressive strength is more than 53.5MPa.
Comparative example 1
Comparative example cement raw materials and cement clinker were produced using outsourced low alkali limestone, the cement raw materials comprising the following raw materials in weight percent: limestone: 81%, outsourcing low alkali limestone: 6%, iron ore dressing powder: 9.5 percent of coal-fired slag: 3.5%.
The chemical composition of the outsourced low-alkali limestone is shown in table 4, and the chemical composition of the rest of the raw materials is the same as in example 1.
TABLE 4 chemical composition of outsourced Low alkali limestone
The cement clinker was prepared in the same manner as in example 1, and the respective performance indexes of the cement clinker thus prepared are shown in Table 5.
Table 5 Performance index of Cement clinker of comparative example 1
As can be seen from tables 3 and 5, the 28-day compressive strength of the cement clinker prepared with the proper amount of dolomite-like slag powder was better than that of the cement clinker prepared with the outsourced low-alkali limestone. And the MgO content of the cement clinker prepared from dolomite slag powder is higher than that of the cement clinker prepared from outsourcing low-alkali limestone. After the MgO content in the clinker is increased, the liquid phase quantity in the clinker is increased, the liquid phase viscosity is reduced, and the clinker is stably used in raw material ingredients, so that the combustibility of the raw material can be obviously improved. Because MgO has the characteristic of micro expansion in concrete, the improvement of MgO is also beneficial to reducing the later drying shrinkage phenomenon of the concrete.
The cost of the ingredients of the cement raw materials using the outsourcing low-alkali limestone is about 37 yuan/ton, the cost of the ingredients of the cement raw materials using the stone dust powder is not more than 35.5 yuan/ton, and the cost of the ingredients of the cement raw materials can be saved by at least 1.5 yuan/ton. The production of cement clinker per year can be reduced by at least 300 ten thousand yuan according to the calculation of 200 ten thousand tons of raw material yield per year.
The invention uses dolomite rock slag powder for cement raw materials, can reduce the cost of cement production, is beneficial to the comprehensive utilization of mineral resources and prolongs the service life of mines.
Finally, it should be noted that: the above list is only a preferred embodiment of the present invention, and it is understood that those skilled in the art can make modifications and variations thereto, and it is intended that the present invention be construed as the scope of the appended claims and their equivalents.
Claims (8)
1. The cement raw material prepared from the stone slag powder is characterized by comprising the following raw materials in percentage by weight:
limestone: 70-80%
Stone slag powder: 10-15%
Iron ore dressing powder: 8-11%
Coal-fired slag: 2% -4%.
2. Cement raw meal made with stone dust according to claim 1, characterized in that the limestone comprises the following components in weight percent:
CaO accounts for 44% -48%, siO 2 The ratio of Al is 6-8 percent 2 O 3 The ratio of Fe is 1.2% -2.3% 2 O 3 0.5-1.0% of the ratio, 1.0-2.0% of MgO, R 2 The O accounts for 0.65-0.85%.
3. The cement raw meal made with stone dust according to claim 1, characterized in that the stone dust comprises the following components in weight percent:
CaO accounts for 42% -44%, siO 2 The ratio of Al is 3% -5% 2 O 3 The ratio of Fe is 1.0% -2.5% 2 O 3 0.5-0.7% of MgO, 10-15% of R 2 The O accounts for 0.4% -0.6%.
4. The cement raw meal made from stone dust according to claim 1, characterized in that the iron beneficiation powder comprises the following components in weight percent:
CaO accounts for 3% -5%, siO 2 60-70% of Al 2 O 3 The ratio of Fe is 1.5% -2.5% 2 O 3 10% -15% of the ratio, 1.5% -3.0% of MgO, and R 2 The O accounts for 0.9% -1.0%.
5. Cement raw meal made with stone dust according to claim 1, characterized in that the coal-fired slag comprises the following components in weight percent:
CaO accounts for 4.0% -6.0%, siO 2 30% -40% of Al 2 O 3 The proportion of Fe is 25% -30% 2 O 3 4.0% -6.0% of the ratio, 0.5% -2.0% of MgO, R 2 The O accounts for 0.7-1.3%.
6. The cement raw material prepared from the stone dust according to claim 1, wherein the stone dust is dolomite powder with the particle size of 0-5 mm, and is mineral separation waste residue.
7. A method for preparing cement clinker using the cement raw material according to any one of claims 1 to 6, characterized by comprising the steps of:
s1, mixing the raw materials in proportion, grinding after mixing to obtain cement raw materials, and placing the raw materials in a homogenization warehouse for homogenization storage;
s2, conveying the homogenized raw meal powder in the step S1 into a preheater through conveying equipment for pre-decomposition to obtain semi-clinker;
s3, feeding the semi-decomposed material obtained in the step S2 into a rotary kiln, calcining at high temperature in the rotary kiln, and then feeding into a grate cooler for quenching and crushing to obtain cement clinker.
8. The method for preparing cement clinker according to claim 7, wherein the temperature in S2 is 850-920 ℃ for 40-60S; and S3, calcining at 1350-1450 ℃ for 30-40 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310631112.6A CN116813222A (en) | 2023-05-31 | 2023-05-31 | Cement raw material prepared from stone slag powder and method for preparing cement clinker by using cement raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310631112.6A CN116813222A (en) | 2023-05-31 | 2023-05-31 | Cement raw material prepared from stone slag powder and method for preparing cement clinker by using cement raw material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116813222A true CN116813222A (en) | 2023-09-29 |
Family
ID=88140387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310631112.6A Pending CN116813222A (en) | 2023-05-31 | 2023-05-31 | Cement raw material prepared from stone slag powder and method for preparing cement clinker by using cement raw material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116813222A (en) |
-
2023
- 2023-05-31 CN CN202310631112.6A patent/CN116813222A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108314338B (en) | Low-alkali portland cement clinker and preparation method thereof | |
| CN103435281A (en) | Cement clinker and preparation process thereof | |
| CN113121131B (en) | Cement clinker produced by using low-grade marble limestone and preparation method thereof | |
| CN112851152B (en) | Cement clinker and cement prepared from lead-zinc smelting furnace slag and preparation method thereof | |
| CN111187013A (en) | Environment-friendly high-strength cement and preparation method thereof | |
| CN111268929B (en) | Green and environment-friendly cement and preparation method thereof | |
| CN105621910A (en) | Sulphate aluminum cement clinker and preparation method thereof and sulphate aluminum cement | |
| CN113354311A (en) | Resource-saving low-carbon cement clinker and preparation method thereof | |
| CN112723779A (en) | Concrete admixture containing high-silicon iron tailings and preparation method thereof | |
| CN115321851A (en) | Green low-carbon high-performance cementing material and preparation method thereof | |
| CN112125542A (en) | Composite portland cement and preparation method thereof | |
| CN101580347A (en) | Composite industrial residue mineralizer cement clinker and preparation method thereof | |
| CN101857384A (en) | Method for producing moderate heat portland cement by utilizing industrial waste | |
| CN112279529A (en) | Method for improving silicon and aluminum content in sintered cement by using converter steel slag | |
| CN110981233B (en) | Ferronickel slag masonry cement and preparation method thereof | |
| CN112723765A (en) | Green environment-friendly medium-alkali portland cement clinker and production process thereof | |
| CN112174551A (en) | Method for preparing cement clinker by using molybdenum tailings, cement clinker and application | |
| CN115925287B (en) | Tungsten-molybdenum-bismuth multi-metal tailing-based cementing material and preparation method and application thereof | |
| CN115231837B (en) | 32.5 low-alkali masonry cement with large mixing amount of low-grade limestone and preparation method thereof | |
| KR102422247B1 (en) | Low carbon and rapid hardening cement composition using ladle furnace slag | |
| CN114349375B (en) | Method for firing portland cement by roasting magnetite pre-selection waste rock | |
| CN114230219B (en) | Preparation method and application of steel slag composite excitant | |
| CN107382107A (en) | A kind of method for preparing sulphoaluminate cement clinker using magnesium slag, manganese slag | |
| CN116813222A (en) | Cement raw material prepared from stone slag powder and method for preparing cement clinker by using cement raw material | |
| CN115385590A (en) | Early-strength low-hydration-heat portland cement clinker prepared from rare earth tailings and preparation method thereof |
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 |