CN107216055B - The clinker and its preparation process of silica sand part substitution sandstone - Google Patents
The clinker and its preparation process of silica sand part substitution sandstone Download PDFInfo
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- CN107216055B CN107216055B CN201710407724.1A CN201710407724A CN107216055B CN 107216055 B CN107216055 B CN 107216055B CN 201710407724 A CN201710407724 A CN 201710407724A CN 107216055 B CN107216055 B CN 107216055B
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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
- C04B7/246—Cements from oil shales, residues or waste other than slag from waste building materials, e.g. waste asbestos-cement products, demolition waste
-
- 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
-
- 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
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
The present invention relates to a kind of clinker of silica sand part substitution sandstone, the raw materials including following parts by weight: lime stone 87-90%, alumina laterite 2.7-3.0%, silica sand+sandstone+building barren rock 6-9%；Wherein, silica sand: sandstone: the quality proportioning for building barren rock is 1:3:1；Specifically comprise the following steps: through ingredient, homogenizing, grinding, select powder, preheating, decomposition, most cooling obtains clinker after high-temperature calcination afterwards.The present invention produces the scheme of clinker using silica sand part substitution sandstone, improve the grindability of raw mill, a large amount of industrial residue silica sand and building barren rock are consumed simultaneously, realize the effective use of resource, and sinter leaching Quality advance, sinter leaching energy consumption further declines, and reduces production cost.
Description
Technical field
The invention belongs to cement industry production technology and industrial solid castoff technical field of comprehensive utilization, more particularly to
A kind of clinker and its preparation process of silica sand part substitution sandstone.
Background technique
The industrial residue that silica sand is generated as hot investment casting, steel-casting industry, year yield at ten thousand tons of 1-2, the valence of silica sand
Lattice are far below the price of sandstone, and chemical component is also close with sandstone, but its MgO, R2O content, especially R2O content is compared with sandstone R2O
Content is higher.In manufacture of cement, the R of raw material2O content has a direct influence to the quality of cement products, if contained in raw material
There is micro R2O can improve the burn-ability of raw material, improve the early strength of raw material, but if R in raw material2O content is excessively high
Coating clogging situation is easily generated in burning clinker of cement.Moreover, harmful components are higher, certainly will be influenced in clinker burning ripe
Material mineral constituent is formed, and then influences clinker quality, becomes the bottleneck of extensive resource utilization.With the hair of building materials industry
The problem of exhibition, resource is nervous, cost increases, also becomes increasingly conspicuous, and therefore, research substitutes sandstone as a raw material for production with silica sand part
Applied to the production of clinker, both meet the resoures recycling based industry policy of country, and protects environment, and can look forward to for cement
Industry energy-saving and emission-reduction reduce cost, it is made to turn waste into wealth, and have important economic benefit and social benefit.
Summary of the invention
The present invention is to solve technical problem present in well-known technique and provide a kind of cement of silica sand part substitution sandstone
Clinker and its preparation process improve the grindability of raw material, improve clinker quality, improve the yield of rotary kiln, reduce life
Produce cost.
The technical scheme adopted by the present invention to solve the technical problems existing in the known art is that
A kind of clinker of silica sand part substitution sandstone, which is characterized in that the raw material including following parts by weight: lime stone
87-90%, alumina laterite 2.7-3.0%, silica sand+sandstone+building barren rock 6-9%；Wherein, silica sand: sandstone: barren rock is built
Quality proportioning is 1:3:1.
Further preferably, the clinker of silica sand part substitution sandstone, the raw material including following parts by weight: lime stone
88.86%, alumina laterite 2.7%, sandstone+silica sand+building barren rock 8.44%；Wherein, silica sand: sandstone: the matter of barren rock is built
Amount proportion is 1:3:1.
Cement clinker quality Con trolling index: clinker MgO≤5.0%, clinker f-CaO content≤1.5%, basic content in clinker≤
0.8%.
Clinker rate value are as follows: KH:0.89 ± 0.02, SM:3.1 ± 0.1, AM:1.6 ± 0.1.
A kind of preparation process of the clinker of silica sand part substitution sandstone, which comprises the steps of:
1) raw materials for production lime stone, alumina laterite, silica sand, sandstone, building barren rock are homogenized respectively and are stored in homogenizing
In library；
2) feeding grinding system carries out after deploying lime stone, alumina laterite, silica sand, sandstone, building barren rock in proportion
Grinding, raw material moisture content≤1%, 80 μm raw material sieve residue≤14% after grinding, obtains the raw material of dry powder-shaped；
3) raw material after grinding in step (2) are imported into powder concentrator sorting, the raw material obtained after sorting import raw material homogenizing
Library is temporary；
4) the raw material feeding preheater after choosing homogenizing in step (3) preheats, and dore furnace, simultaneously is imported after preheating
Coal dust is imported, dore furnace is controlled at 870 DEG C；Before and after adding silica sand, dore furnace controls temperature and is down to 870 by 880 DEG C
DEG C, it reduces into kiln material resolution ratio, liquid phase is avoided to occur clinker knot bulk too early, improve kiln ventilation, reduce and go back Primordial Qi in kiln
Atmosphere improves clinkersintering quality；
5) rotary kiln will be imported by preheating, the raw material for decomposing and coal dust being added and add coal dust, carry out high-temperature calcination, forge
Burning temperature is 1450 DEG C, and kiln speed is 3.5r/min, calcination time 20min, most obtains clinker through grate-cooler cooling afterwards, is burnt into
Clinker MgO≤5.0% in clinker afterwards, clinker f-CaO content≤1.5%, basic content in clinker≤0.8%.
Preferably, preheater is preheated using Pyatyi, and preheater level-one cylinder exports vacuum cavitations in -6800Pa；In addition silicon
After sand, preheater level-one cylinder exports vacuum cavitations and is down to -6800Pa by -7300Pa.
Preferably, the wind-warm syndrome three times of rotary kiln is at 800 DEG C or more, and kliner coating is stablized in 18~19m long in rotary kiln,
200mm is thick.
Preferably, the coal dust is to be obtained after homogenizing storehouse homogenizing, crushing by raw coal.
Compared with prior art, the advantages and positive effects of the present invention are:
1) using the scheme of silica sand part substitution sandstone production clinker, by adjusting in its proportion and calcination process
The conditions such as calcination temperature, time, adjustment dore furnace controls temperature, reduces into kiln material resolution ratio, improve clinkersintering quality,
Realize the Con trolling index of clinker；According to kiln condition, moderately adjustment system draws wind, and reasonably adjusts kiln tail tertiary air valve aperture, puts down
Weigh kiln wind, guarantees that system ventilation is smooth, reduces the skinning and ring formation of rotary kiln；
2) using the scheme of silica sand part substitution sandstone production clinker, improve the burn-ability of raw material, sinter leaching matter
Amount improves, and compression strength increases 2.1Mpa within three days；Clinker content of MgO, clinker f-CaO content and basic content in clinker slightly have
Increase, within the scope of internal quality control, clinker quality is influenced unobvious.
3) silica sand is in fine-powdered, improves the grindability of raw mill, two wires raw material grinding rate reduces 0.61%, raw mill
Platform effect increases 7.05%, and ton raw mill power consumption reduces by 0.18 degree, produces 1100000 tons of raw material per year by two wires, two wires year power cost saving
12.87 ten thousand yuan；And the purchase cost of silica sand is lower than the purchase cost of sandstone, for annual consumption based on 1.5 ten thousand tons, year reduces purchase cost
390000 yuan, year, which adds up to, reduces by 51.87 ten thousand yuan of cost；Kiln platform effect in two wires increases 0.5%；It adds silica sand and makes raw mill and revolution
The output increased of kiln, reduces production cost.
4) using the scheme of silica sand part substitution sandstone production clinker, a large amount of industrial residue silicon is not only consumed
Sand reduces the demand to Sandstone Resources, while also consuming a large amount of building barren rocks, reduce silica sand and building the stacking of barren rock,
The effective use for realizing resource is conducive to beautify ecological environment.
5) preparation process of clinker of the present invention, can not only substantially increase production efficiency of equipment, energy saving, and
And also ensure that raw mill, kiln system are stable, the generation of technology trouble is avoided, while effectively reducing energy consumption.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
In order to further understand the content, features and effects of the present invention, the following examples are hereby given, and cooperate attached drawing
Detailed description are as follows:
Embodiment 1:
Utilize the method for the clinker of silica sand part substitution sandstone, the specific steps are as follows:
1) raw materials for production lime stone, alumina laterite, silica sand, sandstone, building barren rock are homogenized respectively and are stored in homogenizing
In library.
2) by lime stone 88.86%, alumina laterite 2.7%, silica sand+sandstone+building barren rock 8.44%, silica sand: sandstone:
The quality proportioning for building barren rock is 1:3:1, and feeding grinding system carries out grinding after ratio allotment by weight, after controlling grinding
Raw material moisture content≤1%, 80 μm raw material sieve residue≤14%, obtains the raw material of dry powder-shaped.
3) raw material after above-mentioned grinding are imported into powder concentrator sorting, it is temporary that the raw material obtained after sorting import raw material homogenizing silo
It deposits.
4) the above-mentioned raw material feeding preheater chosen after being homogenized is preheated, preheater is preheated using Pyatyi, preheater
Level-one cylinder outlet vacuum cavitations import dore furnace after -6800Pa, preheating while importing coal dust, and control calciner temperature is 870
℃。
5) rotary kiln will be imported by preheating, the raw material for decomposing and coal dust being added and add coal dust, carry out high-temperature calcination, forge
Burning temperature is 1450 DEG C, and kiln speed is 3.5r/min, calcination time 20min, reasonably adjusts kiln tail tertiary air valve aperture, rotary kiln
The wind-warm syndrome three times of tail stablizes kliner coating in rotary kiln in 18~19m long, 200mm is thick, most cold through grate-cooler afterwards at 800 DEG C or more
But clinker is obtained.
Cement clinker quality Con trolling index: clinker MgO≤5.0%, clinker f-CaO content≤1.5%, basic content in clinker≤
0.8%.
Clinker rate value are as follows: KH:0.89 ± 0.02, SM:3.1 ± 0.1, AM:1.6 ± 0.1,
Wherein raw material silica sand in embodiment 1, sandstone sum building barren rock chemical composition analysis be shown in Table 1-1:
Table 1-1
| Raw material | Moisture | LOSS | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | ∑ | K2O | Na2O | R2O |
| Silica sand % | 7.08 | 1.61 | 89.10 | 3.58 | 2.96 | 0.25 | 0.67 | 98.17 | 1.02 | 0.72 | 1.39 |
| Sandstone % | 1.04 | 0.63 | 91.67 | 2.53 | 0.67 | / | 0.38 | 95.88 | 0.67 | 0.08 | 0.52 |
| Build barren rock % | 10.18 | 28.39 | 28.81 | 5.56 | 1.84 | 19.8 | 11.63 | 96.03 | 1.09 | 0.86 | 1.57 |
It can be seen that silica sand grade lower than sandstone by upper table analysis, content of MgO is high compared with sandstone by 0.29%, and alkali content is high
0.87%, in terms of comprehensive, silica sand grade is slightly lower, and harmful components are higher.
In embodiment 1, silica sand incorporation front and back raw mill platform effect is shown in Table 1-2 with rotary kiln platform effect (yield):
Table 1-2
| Raw material grinding rate 80um (%) | Raw mill platform imitates (t/h) | Kiln platform imitates (t/h) | |
| Before silica sand incorporation | 6.49 | 147.43 | 95.13 |
| After silica sand incorporation | 5.88 | 154.48 | 96.57 |
After it can be seen that incorporation silica sand ingredient in table 1-2, raw material grinding rate is reduced, and improves the grindability of raw mill
And burn-ability, the progress of solid phase reaction is accelerated, sinter leaching energy consumption further declines, and raw mill platform effect and kiln platform effect obtain
It improves, the energy is greatly saved, reduces production cost.
In embodiment 1, silica sand incorporation front and back clinker chemical analysis and physical properties results comparison are shown in Table 1-3:
Table 1-3
| Clinker MgO (%) | Basic content in clinker (%) | Clinker f-Cao (%) | 3 days compression strength (MPa) of clinker | |
| Before silica sand incorporation | 4.51 | 0.70 | 0.86 | 26.17 |
| After silica sand incorporation | 4.83 | 0.78 | 1.26 | 28.52 |
As can be seen from table 1-3 that sinter leaching Quality advance, 3 days compression strength of clinker increases after incorporation silica sand ingredient
2.1MPa.Clinker content of MgO, clinker f-CaO content and basic content in clinker are increased slightly, right within the scope of internal quality control
Clinker quality influences unobvious.
To sum up, after using silica sand ingredient, raw material grindability, burn-ability and clinker performance have clear improvement, clinker
It improves a lot with quality, sinter leaching heat consumption is decreased obviously.
Embodiment 2:
Utilize the method for the clinker of silica sand part substitution sandstone, the specific steps are as follows:
1) raw materials for production lime stone, alumina laterite, silica sand, sandstone, building barren rock are homogenized respectively and are stored in homogenizing
In library.
2) by lime stone 89.80%, alumina laterite 2.7%, silica sand+sandstone+building barren rock 7.5%, silica sand: sandstone:
The quality proportioning for building barren rock is 1:3:1, and feeding grinding system carries out grinding after ratio allotment by weight, after controlling grinding
Raw material moisture content≤1%, 80 μm raw material sieve residue≤14%, obtains the raw material of dry powder-shaped.
3) raw material after above-mentioned grinding are imported into powder concentrator sorting, it is temporary that the raw material obtained after sorting import raw material homogenizing silo
It deposits.
4) the above-mentioned raw material feeding preheater chosen after being homogenized is preheated, preheater is preheated using Pyatyi, preheater
Level-one cylinder outlet vacuum cavitations import dore furnace after -6800Pa, preheating while importing coal dust, and control calciner temperature is 870
℃。
5) rotary kiln will be imported by preheating, the raw material for decomposing and coal dust being added and add coal dust, carry out high-temperature calcination, forge
Burning temperature is 1450 DEG C, and kiln speed is 3.5r/min, calcination time 20min, reasonably adjusts kiln tail tertiary air valve aperture, rotary kiln
The wind-warm syndrome three times of tail stablizes kliner coating in rotary kiln in 18~19m long, 200mm is thick, most cold through grate-cooler afterwards at 800 DEG C or more
But clinker is obtained.
Cement clinker quality Con trolling index: clinker MgO≤5.0%, clinker f-CaO content≤1.5%, basic content in clinker≤
0.8%.
Clinker rate value are as follows: KH:0.89 ± 0.02, SM:3.1 ± 0.1, AM:1.6 ± 0.1,
In embodiment 2, silica sand incorporation front and back raw mill platform effect is shown in Table 2-1 with rotary kiln platform effect (yield):
Table 2-1
| Raw material grinding rate 80um (%) | Raw mill platform imitates (t/h) | Kiln platform imitates (t/h) | |
| Before silica sand incorporation | 6.49 | 147.43 | 95.13 |
| After silica sand incorporation | 6.18 | 157.67 | 99.46 |
After it can be seen that incorporation silica sand ingredient in table 2-1, the grindability and burn-ability of raw mill are improved, is accelerated
The progress of solid phase reaction, sinter leaching energy consumption further decline, and raw mill platform effect and kiln platform effect are improved, and are greatly saved
The energy reduces production cost.
In embodiment 2, silica sand incorporation front and back clinker chemical analysis and physical properties results comparison are shown in Table 2-2:
Table 2-2
| Clinker MgO (%) | Basic content in clinker (%) | Clinker f-Cao (%) | 3 days compression strength (MPa) of clinker | |
| Before silica sand incorporation | 4.51 | 0.70 | 0.86 | 26.17 |
| After silica sand incorporation | 4.56 | 0.71 | 0.93 | 29.8 |
After it can be seen that incorporation silica sand ingredient in table 2-2, sinter leaching Quality advance, 3 days compression strength of clinker increases
3.63MPa.Clinker content of MgO, clinker f-CaO content and basic content in clinker are increased slightly, right within the scope of internal quality control
Clinker quality influences unobvious.
To sum up, after using silica sand ingredient, raw material grindability, burn-ability and clinker performance have clear improvement, clinker
It improves a lot with quality, sinter leaching heat consumption is decreased obviously.
The above is only the preferred embodiments of the present invention, and is not intended to limit the present invention in any form,
Any simple modification made to the above embodiment according to the technical essence of the invention, equivalent variations and modification, belong to
In the range of technical solution of the present invention.
Claims (7)
1. a kind of clinker of silica sand part substitution sandstone, which is characterized in that the raw material including following parts by weight: lime stone
87-90%, alumina laterite 2.7-3.0%, silica sand+sandstone+building barren rock 6-9%；Wherein, silica sand: sandstone: barren rock is built
Quality proportioning is 1:3:1；
Cement clinker quality Con trolling index: clinker MgO≤5.0%, clinker f-CaO content≤1.5%, basic content in clinker≤
0.8%.
2. the clinker of substitution sandstone in silica sand part according to claim 1, it is characterised in that: including following parts by weight
Raw material: lime stone 88.86%, alumina laterite 2.7%, sandstone+silica sand+building barren rock 8.44%.
3. the clinker of substitution sandstone in silica sand part according to claim 1 or 2, it is characterised in that: clinker rate
Value are as follows: KH:0.89 ± 0.02, SM:3.1 ± 0.1, AM:1.6 ± 0.1.
4. the preparation process of the clinker of substitution sandstone in silica sand part according to claim 1-3, feature
It is, includes the following steps:
1) raw materials for production lime stone, alumina laterite, silica sand, sandstone, building barren rock are homogenized respectively and are stored in homogenizing storehouse；
2) feeding grinding system carries out grinding after deploying lime stone, alumina laterite, silica sand, sandstone, building barren rock in proportion,
Raw material moisture content≤1%, 80 μm raw material sieve residue≤14% after grinding, obtains the raw material of dry powder-shaped；
3) raw material after grinding in step (2) are imported into powder concentrator sorting, it is temporary that the raw material obtained after sorting import raw material homogenizing silo
It deposits；
4) the raw material feeding preheater after being homogenized will be chosen in step (3) to preheat, dore furnace is imported after preheating, is imported simultaneously
Coal dust, dore furnace is controlled at 870 DEG C；
5) rotary kiln will be imported by preheating, the raw material for decomposing and coal dust being added and add coal dust, carry out high-temperature calcination, calcining temperature
Degree is 1450 DEG C, and kiln speed is 3.5r/min, calcination time 20min, most clinker is obtained through grate-cooler cooling afterwards, after firing
Clinker MgO≤5.0% in clinker, clinker f-CaO content≤1.5%, basic content in clinker≤0.8%.
5. the preparation process of the clinker of substitution sandstone in silica sand part according to claim 4, which is characterized in that described
Preheater is preheated using Pyatyi, and preheater level-one cylinder exports vacuum cavitations in -6800Pa.
6. the preparation process of the clinker of substitution sandstone in silica sand part according to claim 4, which is characterized in that described
The wind-warm syndrome three times of rotary kiln is at 800 DEG C or more, and kliner coating is stablized in 18~19m long in rotary kiln, and 200mm is thick.
7. the preparation process of the clinker of substitution sandstone in silica sand part according to claim 4, which is characterized in that described
Coal dust is to be obtained after homogenizing storehouse homogenizing, crushing by raw coal.
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Address after: 300400 Tianjin Yinhe bridge Beichen district north of Beichen Economic Development Zone Applicant after: Tianjin Jinyu revitalizing environmental protection & Technology Co., Ltd. Address before: 300400 Tianjin Yinhe bridge Beichen district north of Beichen Economic Development Zone Applicant before: Tianjin Zhenxing Cement Co., Ltd. |
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