CN111439940A - Fly ash solid waste as raw material admixture - Google Patents
Fly ash solid waste as raw material admixture Download PDFInfo
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- CN111439940A CN111439940A CN202010340965.0A CN202010340965A CN111439940A CN 111439940 A CN111439940 A CN 111439940A CN 202010340965 A CN202010340965 A CN 202010340965A CN 111439940 A CN111439940 A CN 111439940A
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- fly ash
- percent
- admixture
- solid waste
- ash
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- 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
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
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- 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
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/44—Burning; Melting
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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
Abstract
The invention discloses a fly ash solid waste as raw material admixture, which is characterized by comprising the following components in percentage by weight: the material comprises the following components in percentage by weight: 85% -92%, sandstone: 3% -10%, fly ash: 2% -10%, non-ferrous metal ash: 2% -5%, wherein the limestone contains SiO 2: 10-30%, Al2O 3: 5% -15%, Fe2O 3: 5-10%, CaO: 46% -53%, wherein the sandstone comprises SiO 2: 65% -80%, Al2O 3: 7% -12%, Fe2O 3: 1.0-3.0%, CaO: 1-5%, and the non-ferrous metal ash contains SiO 2: 20% -30%, Al2O 3: 9-20%, Fe2O 3: 4% -10%, CaO: 50% -55%, wherein the fly ash contains SiO 2: 25-35%, Al2O 3: 35% -45%, Fe2O 3: 5-10%, CaO: 5 to 10 percent of carbon particles, and the balance of carbon particles which are not burnt out. The invention has the advantages that the fly ash can be recycled and the cement production cost can be reduced by adding the fly ash into the raw material.
Description
Technical Field
The invention relates to the technical field of cement raw materials, in particular to a fly ash solid waste used as a raw material admixture.
Background
Fly ash is fine ash collected from flue gas generated after coal combustion, and is main solid waste discharged from coal-fired power plants. The main oxide composition of the fly ash of the thermal power plant in China is as follows: SiO2, Al2O3, FeO, Fe2O3, CaO, TiO2, and the like. Along with the development of the power industry, the discharge amount of fly ash of coal-fired power plants is increased year by year, and the fly ash becomes one of industrial waste residues with larger discharge amount in China. A large amount of fly ash can generate dust without treatment, thereby polluting the atmosphere; if discharged into a water system, the river can be silted, and toxic chemicals in the river can cause harm to human bodies and organisms. However, the fly ash can be recycled, such as being used as an admixture of cement and the like. The rate of the fly ash used for producing building materials in China reaches 30 percent. Because the chemical components of the fly ash are similar to those of the clay, the fly ash with different percentages is willing to be mixed to replace part of the clay to produce cement with different grades. The R-type flyash silicate cement with 325 and 425 marks is produced by dry-discharged flyash of Texas power plant in Texas building material factory, so that it can obtain good economic and social benefits. Fly ash, as an inexpensive additive and extender, has great advantages due to its pozzolanic activity, spherical particle morphology, and low water demand.
Abroad, the netherlands mainly utilize fly ash to produce cement (55%), artificial aggregate (18%), concrete (4%), bricks (2%) and the like, while Japan is mainly used for producing cement, the proportion of the fly ash accounts for 68% of the total utilization rate of the fly ash, and the proportion of the fly ash applied to producing the cement and the concrete in the United states accounts for 40%, so that the fly ash has a large application space in the preparation of the cement on the whole, and the technology is mature day by day.
The fly ash is low in price and has abundant fly ash resources nearby, so that the research on the comprehensive utilization of the fly ash in the preparation of cement can reduce the production cost of the department, consume a large amount of solid waste of the fly ash and achieve the purposes of energy conservation and environmental protection.
Disclosure of Invention
The invention aims to provide a fly ash solid waste serving as a raw material admixture, which has the advantages that fly ash can be recycled by adding the fly ash into a raw material, and the cement production cost can be reduced, so that the problem that the fly ash discharge amount of a coal-fired power plant is increased year by year along with the development of the power industry is solved, the fly ash becomes one of industrial waste residues with larger current discharge amount in China, and a large amount of fly ash can generate raised dust and pollute the atmosphere without being treated; if the water is discharged into a water system, river congestion can be caused, and toxic chemical substances in the water system can cause harm to human bodies and organisms.
In order to achieve the purpose, the invention provides the following technical scheme: the fly ash solid waste serving as a raw material admixture is characterized by comprising the following components: limestone, sandstone, non-ferrous metal ash and fly ash.
Preferably, the mixture ratio of the limestone, the sandstone, the non-ferrous metal ash and the fly ash is limestone: 85% -92%, sandstone: 2% -5%, non-ferrous metal ash: 2% -5%, fly ash: 2 to 10 percent.
Preferably, the limestone contains SiO 2: 10-30%, Al2O 3: 5% -15%, Fe2O 3: 5-10%, CaO: 46 to 53 percent.
Preferably, the sandstone comprises SiO 2: 65% -80%, Al2O 3: 7% -12%, Fe2O 3: 1.0-3.0%, CaO: 1 to 5 percent.
Preferably, the nonferrous metal ash contains SiO 2: 20% -30%, Al2O 3: 9-20%, Fe2O 3: 4% -10%, CaO: 50 to 55 percent.
Preferably, the fly ash contains SiO 2: 25-35%, Al2O 3: 35% -45%, Fe2O 3: 5-10%, CaO: 5 to 10 percent of carbon particles, and the balance of carbon particles which are not burnt out.
Preferably, before mixing, limestone, sandstone, non-ferrous metal ash and fly ash are proportionally mixed by a batching scale, and are simultaneously added into a pulverizer for pulverizing, wherein the fineness of raw materials is normally controlled within 18 percent +/-2 percent of the fineness of 0.08 after-screen fineness and within 1.6 percent of the fineness of 0.2 after-screen fineness.
Preferably, the ground particles of limestone, sandstone, non-ferrous metal ash and fly ash are added into a mixer according to a certain proportion before sintering, and are stirred and mixed, so that the heterogeneity is reduced continuously.
Preferably, the fly ash contains 8% of moisture, and the particle diameter of the fly ash needs to be controlled to be 45um with a screen residue of less than 10%.
Preferably, the temperature of the kiln tail decomposing furnace is controlled to be 850-870 ℃ during sintering of the admixture.
Compared with the prior art, the invention has the beneficial effects that: the aluminum content of the raw material can be corrected by controlling the aluminum content in the fly ash to be between 35 and 45 percent, the fly ash can be used as an aluminum correction material, and the fly ash contains a small amount of unburned carbon particles, so that the combustibility of the admixture is improved, the effects of reducing fuel consumption and reducing production cost are achieved, the temperature of a kiln tail decomposition furnace is controlled to be 850-870 ℃ during sintering of the admixture, the fineness of fuel coal powder is reduced to 6 percent, and the phenomena of balling in the kiln and pre-heater skinning and blocking are avoided.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment provided by the invention comprises the following steps:
example 1:
a fly ash solid waste is used as a raw material admixture, which comprises: limestone, sandstone, non-ferrous metal ash and fly ash are proportionally mixed by a batching scale before mixing, and simultaneously addedThe method is characterized in that the grinding is carried out in the grinding mill, the fineness of raw materials is normally controlled within 18% +/-2% of the fineness of 0.08 screen residue and within 1.6% of the fineness of 0.2 screen residue, particles of ground limestone, sandstone, non-ferrous metal ash and fly ash are added into a mixer according to a certain proportion before sintering to be stirred and mixed, the heterogeneity is continuously reduced, and the mixture ratio of the limestone, the sandstone, the non-ferrous metal ash and the fly ash is limestone: 92% sandstone: 3.8%, non-ferrous metal ash: 2.2%, fly ash: 2 percent of non-ferrous metal ash slag containing SiO2：30％，Al2O3：19％，Fe2O3: 6%, CaO: 45 percent of fly ash containing SiO2：35％，Al2O3：45％，Fe2O3: 8%, CaO: 5 percent of unburned carbon particles, 8 percent of water in the fly ash, and the particle diameter of the fly ash needs to be controlled to be 45um screen residue<10 percent, the proportion of the aluminum content in the fly ash is controlled between 35 percent and 45 percent, the aluminum content of the raw material can be corrected, the aluminum content can be used as an aluminum correction material, the fly ash contains a small amount of unburned carbon particles, the combustibility of the admixture is improved, the effects of reducing the fuel consumption and the production cost are achieved, the temperature of a kiln tail decomposing furnace during sintering of the admixture is controlled to be 850-870 ℃, the fineness of the fuel coal powder is reduced to 6 percent, the phenomena of balling in the kiln and pre-heater skinning and blocking are avoided, a large amount of solid waste of the fly ash is consumed, and the purposes of energy conservation and environmental protection are achieved.
Example 2:
a fly ash solid waste is used as a raw material admixture, which comprises: limestone, sandstone, non ferrous metal lime-ash and fly ash, mix limestone, sandstone, non ferrous metal lime-ash and fly ash through batching scale proportion before mixing, add the crocus machine into simultaneously and carry out the crocus, raw meal fineness normal control is in 0.08 surplus fineness control 18% +/-2%, within 0.2 surplus fineness control 1.6%, lime stone after will grinding before the sintering, sandstone, the granule of non ferrous metal lime-ash and fly ash is added in the mixer according to certain proportion and is stirred the mixture, make its inhomogeneity constantly reduce, limestone, sandstone, the batching ratio of non ferrous metal lime-ash and fly ash is the lime stone: 85% of sandRock: 3% of non-ferrous metal ash: 2%, fly ash: 10 percent of non-ferrous metal ash slag containing SiO2：20％，Al2O3：15％，Fe2O3: 10%, CaO: 55 percent of fly ash containing SiO2：25％，Al2O3：35％，Fe2O3: 5%, CaO: 10 percent of unburned carbon particles, 8 percent of water in the fly ash, and the particle diameter of the fly ash needs to be controlled to be 45um screen residue<10 percent, the proportion of the aluminum content in the fly ash is controlled between 35 percent and 45 percent, the aluminum content of the raw material can be corrected, the aluminum content can be used as an aluminum correction material, the fly ash contains a small amount of unburned carbon particles, the combustibility of the admixture is improved, the effects of reducing the fuel consumption and the production cost are achieved, the temperature of a kiln tail decomposing furnace during sintering of the admixture is controlled to be 850-870 ℃, the fineness of the fuel coal powder is reduced to 6 percent, the phenomena of balling in the kiln and pre-heater skinning and blocking are avoided, a large amount of solid waste of the fly ash is consumed, and the purposes of energy conservation and environmental protection are achieved.
Example 3:
a fly ash solid waste is used as a raw material admixture, which comprises: limestone, sandstone, non ferrous metal lime-ash and fly ash, mix limestone, sandstone, non ferrous metal lime-ash and fly ash through batching scale proportion before mixing, add the crocus in the crocus machine simultaneously and carry out the crocus, raw meal fineness normal control is in 0.08 surplus fineness control 18% +/-2%, within 0.2 surplus fineness control 1.6%, lime stone after will grinding before the sintering, sandstone, the granule of non ferrous metal lime-ash and fly ash is added in the mixer according to certain proportion and is stirred the mixture, make its inhomogenity constantly reduce, limestone, sandstone, the batching ratio of non ferrous metal lime-ash and fly ash is the lime stone: 90% of sandstone: 3% of non-ferrous metal ash: 3% of fly ash: 4 percent of non-ferrous metal ash slag containing SiO2：30％，Al2O3：20％，Fe2O3: 10%, CaO: 40 percent of fly ash containing SiO2：30％，Al2O3：40％，Fe2O3: 10%, CaO: 10 percent of coal ash, the balance being unburned carbon particles, and the coal ash content being 8 percentMoisture content, and the particle diameter of the fly ash needs to be controlled to 45um screen residue<10 percent, the proportion of the aluminum content in the fly ash is controlled between 35 percent and 45 percent, the aluminum content of the raw material can be corrected, the aluminum content can be used as an aluminum correction material, the fly ash contains a small amount of unburned carbon particles, the combustibility of the admixture is improved, the effects of reducing the fuel consumption and the production cost are achieved, the temperature of a kiln tail decomposing furnace during sintering of the admixture is controlled to be 850-870 ℃, the fineness of the fuel coal powder is reduced to 6 percent, the phenomena of balling in the kiln and pre-heater skinning and blocking are avoided, a large amount of solid waste of the fly ash is consumed, and the purposes of energy conservation and environmental protection are achieved.
Example 4:
a fly ash solid waste is used as a raw material admixture, which comprises: limestone, sandstone, non ferrous metal lime-ash and fly ash, mix limestone, sandstone, non ferrous metal lime-ash and fly ash through batching scale proportion before mixing, add the crocus in the crocus machine simultaneously and carry out the crocus, raw meal fineness normal control is in 0.08 surplus fineness control 18% +/-2%, within 0.2 surplus fineness control 1.6%, lime stone after will grinding before the sintering, sandstone, the granule of non ferrous metal lime-ash and fly ash is added in the mixer according to certain proportion and is stirred the mixture, make its inhomogenity constantly reduce, limestone, sandstone, the batching ratio of non ferrous metal lime-ash and fly ash is the lime stone: 92% sandstone: 2% of non-ferrous metal ash: 2%, fly ash: 6 percent of non-ferrous metal ash slag containing SiO2：30％，Al2O3：10％，Fe2O3: 10%, CaO: 50 percent of fly ash containing SiO2：30％，Al2O3：45％，Fe2O3: 5%, CaO: 5 percent of unburned carbon particles, 8 percent of water in the fly ash, and the particle diameter of the fly ash needs to be controlled to be 45um screen residue<10 percent, the aluminum content in the fly ash is controlled between 35 percent and 45 percent, the aluminum content of the raw material can be corrected, the fly ash can be used as an aluminum correction material, the fly ash contains a small amount of unburned carbon particles, the easy combustibility of the admixture is increased, the effects of reducing fuel consumption and reducing production cost are achieved, the temperature of a kiln tail decomposition furnace is controlled to be 850 during sintering of the admixtureThe fineness of the fuel coal powder is reduced to 6 percent at the temperature of 870 ℃ below zero, and the phenomena of balling in a kiln and crusting and blocking of a preheater are avoided, so that the aims of consuming a large amount of coal ash and solid waste and saving energy and protecting environment are fulfilled.
Example 5:
a fly ash solid waste is used as a raw material admixture, which comprises: limestone, sandstone, non ferrous metal lime-ash and fly ash, mix limestone, sandstone, non ferrous metal lime-ash and fly ash through batching scale proportion before mixing, add the crocus in the crocus machine simultaneously and carry out the crocus, raw meal fineness normal control is in 0.08 surplus fineness control 18% +/-2%, within 0.2 surplus fineness control 1.6%, lime stone after will grinding before the sintering, sandstone, the granule of non ferrous metal lime-ash and fly ash is added in the mixer according to certain proportion and is stirred the mixture, make its inhomogenity constantly reduce, limestone, sandstone, the batching ratio of non ferrous metal lime-ash and fly ash is the lime stone: 91% of sandstone: 3% of non-ferrous metal ash: 3% of fly ash: 3 percent of non-ferrous metal ash slag containing SiO2：22％，Al2O3：18％，Fe2O3: 10%, CaO: 50 percent of fly ash containing SiO2：35％，Al2O3：45％，Fe2O3: 5%, CaO: 5 percent of unburned carbon particles, 8 percent of water in the fly ash, and the particle diameter of the fly ash needs to be controlled to be 45um screen residue<10 percent, the proportion of the aluminum content in the fly ash is controlled between 35 percent and 45 percent, the aluminum content of the raw material can be corrected, the aluminum content can be used as an aluminum correction material, the fly ash contains a small amount of unburned carbon particles, the combustibility of the admixture is improved, the effects of reducing the fuel consumption and the production cost are achieved, the temperature of a kiln tail decomposing furnace during sintering of the admixture is controlled to be 850-870 ℃, the fineness of the fuel coal powder is reduced to 6 percent, the phenomena of balling in the kiln and pre-heater skinning and blocking are avoided, a large amount of solid waste of the fly ash is consumed, and the purposes of energy conservation and environmental protection are achieved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. The fly ash solid waste serving as a raw material admixture is characterized by comprising the following components: limestone, sandstone, non-ferrous metal ash and fly ash.
2. The admixture for raw meal made of fly ash solid waste according to claim 1, which is characterized in that: the mixture ratio of the limestone, the sandstone, the non-ferrous metal ash and the fly ash is limestone: 85% -92%, sandstone: 3% -10%, non-ferrous metal ash: 2% -5%, fly ash: 2 to 10 percent.
3. The admixture for raw meal made of fly ash solid waste according to claim 1, which is characterized in that: the limestone contains SiO 2: 10-30%, Al2O 3: 5% -15%, Fe2O 3: 5-10%, CaO: 46 to 53 percent.
4. The admixture for raw meal made of fly ash solid waste according to claim 1, which is characterized in that: the sandstone comprises SiO 2: 65% -80%, Al2O 3: 7% -12%, Fe2O 3: 1.0-3.0%, CaO: 1 to 5 percent.
5. The admixture for raw meal made of fly ash solid waste according to claim 1, which is characterized in that: the non-ferrous metal ash contains SiO 2: 20% -30%, Al2O 3: 9-20%, Fe2O 3: 4% -10%, CaO: 50 to 55 percent.
6. The admixture for raw meal made of fly ash solid waste according to claim 1, which is characterized in that: the fly ash contains SiO 2: 25-35%, Al2O 3: 35% -45%, Fe2O 3: 5-10%, CaO: 5 to 10 percent of carbon particles, and the balance of carbon particles which are not burnt out.
7. The admixture for raw meal made of fly ash solid waste according to claim 1, which is characterized in that: before mixing, limestone, sandstone, non-ferrous metal ash and fly ash are proportionally mixed by a batching scale, and are simultaneously added into a pulverizer to be pulverized, wherein the fineness of raw materials is normally controlled within 18 percent +/-2 percent of the fineness of 0.08 after-screen fineness and within 1.6 percent of the fineness of 0.2 after-screen fineness.
8. The admixture for raw meal made of fly ash solid waste according to claim 1, which is characterized in that: before sintering, the ground particles of limestone, sandstone, non-ferrous metal ash and fly ash are added into a mixer according to a certain proportion to be stirred and mixed, so that the heterogeneity is continuously reduced.
9. The admixture for raw meal made of fly ash solid waste according to claim 1, which is characterized in that: the fly ash contains 8% of moisture, and the particle diameter of the fly ash needs to be controlled to be 45um with a screen residue of less than 10%.
10. The admixture for raw meal made of fly ash solid waste according to claim 1, which is characterized in that: the temperature of the kiln tail decomposing furnace is controlled to be 850-870 ℃ when the admixture is sintered.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112759295A (en) * | 2021-02-10 | 2021-05-07 | 广东鸿丰水泥有限公司 | Process for preparing raw material admixture by using fly ash |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435281A (en) * | 2013-08-15 | 2013-12-11 | 威顿水泥集团有限责任公司 | Cement clinker and preparation process thereof |
-
2020
- 2020-04-26 CN CN202010340965.0A patent/CN111439940A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435281A (en) * | 2013-08-15 | 2013-12-11 | 威顿水泥集团有限责任公司 | Cement clinker and preparation process thereof |
Non-Patent Citations (1)
| Title |
|---|
| 谢志峰: "《固体废物处理及利用》", 31 January 2014, 中央广播电视大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112759295A (en) * | 2021-02-10 | 2021-05-07 | 广东鸿丰水泥有限公司 | Process for preparing raw material admixture by using fly ash |
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