CN108117282A - A kind of Portland clinker and preparation method thereof - Google Patents
A kind of Portland clinker and preparation method thereof Download PDFInfo
- Publication number
- CN108117282A CN108117282A CN201711420913.9A CN201711420913A CN108117282A CN 108117282 A CN108117282 A CN 108117282A CN 201711420913 A CN201711420913 A CN 201711420913A CN 108117282 A CN108117282 A CN 108117282A
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- clinker
- lime stone
- sulfur
- portland
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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
- C04B7/02—Portland cement
-
- 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
- C04B7/47—Cooling ; Waste heat management
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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)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The present invention relates to a kind of Portland clinker and preparation method thereof more particularly to a kind of Portland clinkers that high-sulfur limestone tailing is utilized to produce and preparation method thereof.It is characterized in that, it includes the technical process such as raw material disposal, raw meal proportioning, clinker burning, fat lime stone 0% ~ 40% is substituted using high-sulfur limestone tailing by collocation, optimizes cement clinker production technology calcining cement clinker, clinker moduli control exists：Aluminium rate IM=1.8 ~ 2.1, lime saturation factor KM=0.92 0.94, silicon rate SM=2.5 2.8.Portland clinker produced by the present invention not only has excellent physical property, but also preparation process makes full use of the mineral resources such as limestone tailing, fires high-quality portland cement clinker, the sustainability of resource is promoted to utilize.
Description
Technical field
The invention belongs to building material technical fields, and in particular to a kind of Portland clinker and preparation method thereof.
Background technology
In mining, raw material of the high-quality high-grade lime stone as manufacture of cement are usually preferentially selected, and it is right
And tailing that calcium component content low high in component contents such as the low-grade silicon in part, aluminium, sulphur then air storage, give it up, this
The waste of resource is caused, adds production cost.Low-grade high-sulfur lime stone is thrown away in sorting ore generally as tailing,
And high-sulfur limestone tailing how is efficiently used as the increase of yield, high-sulfur limestone tailing amount also gradually increase every year
It is cement industry urgent problem to be solved to produce High Quality Clinker.
In portland cement production, the sulphur of preheater-dore furnace-kiln system is mainly introduced by raw material and fuel, and sulphur exists
Mainly exist in high-sulfur limestone tailing in the form of sulfate or sulfide, the calcium sulfate decomposition starting temperature in oxidizing atmosphere
For 750 DEG C~1100 DEG C, 1450 DEG C are decomposed completely, and calcium sulfate reacts in 900 DEG C~1000 DEG C and carbon, and generates SO2Into
Enter in kiln gas；With alkali vapor combination reaction can occur for sulphur in kiln gas, also can form alkali metal with the solid base chemical combination in raw material
Sulfate, and raw material surface is condensed upon, finally all enter clinkering zone with raw material, so as to occur sulfur cycle between preheater and kiln
With enrichment, formed " inside the cycling " of sulphur.In cement burning assembly procedure, in raw materials and fuel on the one hand high sulfur content can reduce and burn till temperature
Degree accelerates alite to be formed, improves clinker mineral composition, on the other hand can aggravate Coating clogging and clinker is caused to dissociate oxidation
The problems such as calcium is high, clinker quality fluctuation is big, therefore clinker burning in meeting long lasting effect cement rotary kiln.Since limestone tailing is worked as
Middle sulfur content is higher, not only has large effect to kiln system during clinker burning, unfavorable to clinker yield and quality, and kiln
High SO in exit gas2Gas componant content, adversely affects ecological environment.
To eliminate negative effect that high-sulfur limestone tailing brings burning clinker of cement, it is necessary to make full use of various physics
Chemical means promote the low temperature of clinker ore deposit phase system quickly to be formed, greatly improve the gelling of clinker ore deposit phase system.Due to sulphur meeting
The liquid phase viscosity and surface tension of clinker are reduced, causes knot great circle in cement rotary kiln, kiln condition is influenced and stablizes, therefore by using
" three high " proportion scheme based on high alumina rate can optimize the amount of liquid phase of clinker and liquid phase viscosity, stablize kiln condition；High calcium silicates is ripe
Material generally has higher-strength, and for high silicon clinker, clinker aluminium rate is improved, being conducive to alite forms, and research shows A Li
Special crystalline size increases with aluminium rate and is reduced, and crystal draw ratio substantially increases, and clinker physical property increases, and especially works as calcining heat
Higher than 1400 DEG C, high-silicon high aluminium clinker has a higher burn-ability, therefore high full lime stone saturation coefficient, silicon rate, aluminium rate are matched somebody with somebody
Material scheme ensure that 3 days and 28 days intensity of clinker, improve clinker quality.
For the influence that the use for reducing high-sulfur limestone tailing runs environment and equipment, bypass system can be used,
Circulation collection in precalciner system can be largely reduced, alleviates the generation of precalciner system skinning, while reduces kiln tail
SO2Content discharge capacity.
Therefore, by improving the utilization of high-sulfur limestone tailing, raw meal proportioning and clinker burning technique are optimized, using high alumina
Rate, high lime saturation factor, high silicon rate dispensing thinking can not only reduce production cost, improve kiln condition, ensure the normal operation of kiln
And the stabilization of clinker quality, and realize the comprehensive utilization of limestone tailing, reduce the destruction to environment.
The content of the invention
The high-sulfur of being solved limestone tailing comprehensive utilization of resources problem of the invention, and fire with excellent gelling
Portland clinker, the present invention provide a kind of Portland clinker and preparation method thereof, and fat lime is used by collocation
Stone ore and high-sulfur limestone tailing improve mine resources comprehensive utilization；By optimizing clinker moduli, using high alumina rate, high lime
Saturation coefficient, high silicon rate dispensing thinking, reduce influence of the sulphur to cement burning quality；By improving calcining heat, strengthen ripe
Expect cooling system, ensure that clinker mineral is formed and stablized, ensure that clinker 3 days and 28 days intensity；By optimizing calcine technology,
Using bypass system, the sulfur content of kiln circulating enrichment is reduced, avoids the influence that skinning etc. stablizes kiln condition, improved
Clinker yield and quality.
The technical solution adopted in the present invention is：
A kind of Portland clinker, the formula of the clinker is by high-sulfur lime stone, fat lime stone, sandstone, shale, tripoli
Composition；The proportioning of wherein each raw material is high-sulfur lime stone 0-35%, fat lime stone 50-87%, sandstone 7-10%, shale 4-
7%, tripoli 0.5-2%.
Further, the Portland clinker rate value is respectively：Aluminium rate IM=1.8~2.1, lime saturation factor
KM=0.92-0.94, silicon rate SM=2.5-2.8.
Further, the sulfur content of the high-sulfur lime stone is 2-3%, calcium content 40-42%.The high-quality stone
The sulfur content of lime stone is 0.1% and less, calcium content for 48% and more than.
Further, the high-sulfur lime stone and fat lime stone by mining area lime stone by sieving, once breaking twice
Broken to obtain, high-sulfur lime stone and fat lime stone enter lime stone heap canopy by arranging in pairs or groups, after homogenizing processing.
The preparation method of the Portland clinker, includes the following steps：
The first step takes high-sulfur lime stone, fat lime stone mixture, and sandstone, shale, tripoli respectively must after grinding is homogenized
Mixed raw material；
Second step by mixed raw material input precalciner system calcining, cools down by grate-cooler and high alumina rate clinker is made.
1450-1500 DEG C of clinker burning temperature.Clinker is cooled to+65 DEG C of environment temperature through grate-cooler.Precalciner system
Middle dore furnace lower part has bypass system, and exhausting amount hourly is kiln system air quantity 5%.The silicon obtained using this method
Acid salt cement clinker moduli：Aluminium rate IM=1.8~2.1, lime saturation factor KM=0.92-0.94, silicon rate SM=2.5-2.8.
The beneficial effects of the invention are as follows：The present invention can not only realize limestone mine comprehensive utilization of resources, and can pass through
Raw meal proportioning, clinker moduli control, calcine technology optimization burn out the clinker with excellent performance, and alleviate kiln tail
SO2Pollution.
Technical scheme focuses on solving the comprehensive utilization in manufacture of cement of high-sulfur limestone tailing, is
Influence of the high-sulfur limestone tailing to sinter leaching is eliminated, ensures the performances such as clinker strength, by optimizing clinker moduli, using height
Aluminium rate, high lime saturation factor, high silicon rate dispensing thinking.Since sulphur can reduce the liquid phase viscosity and surface tension of clinker, cause
Knot great circle in cement rotary kiln influences kiln condition stabilization, can optimize the amount of liquid phase of clinker and liquid phase viscosity using three high proportion schemes,
Stablize kiln condition, improve clinker aluminium rate, be conducive to alite and formed, research shows that alite crystalline size increases with aluminium rate and subtracted
Small, crystal draw ratio substantially increases, and clinker physical property increases, and especially works as calcining heat higher than 1400 DEG C, high-silicon high aluminium clinker
With higher burn-ability.There is explanation inside research background technology.
Technical scheme describes in preparation method：1. add the pre- of high-sulfur lime stone and fat lime stone
Processing procedure, by sieving twice, primary fragmentation obtain high-sulfur lime stone and fat lime stone, then by arranging in pairs or groups, homogenizing processing
Afterwards into lime stone heap canopy, the requirement to sulfur content and CaO in raw material can be more precisely controlled.2. by improving calcining heat
(1450-1500 degrees Celsius) strengthens clinker cooling system (+65 DEG C of environment temperature is cooled in grate-cooler), ensure that clinker
Mineral formation and stabilization.3. using bypass system, the sulfur content of kiln circulating enrichment is reduced, avoids skinning etc. to kiln
The influence that condition is stablized improves the yield and quality of cement clinker quality.
Existing technical solution has weakened the concept of high alumina, and high alumina rate is intended merely to solve high-sulfur limestone tailing
Solution of problems in calcination of chamotte, this patent is primarily to solve high-sulfur limestone tailing in manufacture of cement
Comprehensive utilization.Using high alumina rate proportion scheme, high alumina rate clinker will be obtained.
Description of the drawings
Fig. 1 is high-sulfur lime stone of the present invention and fat lime stone proportioning process.
The lithofacies analysis figure of 3 clinker of Fig. 2 embodiments.
Specific implementation method
For a better understanding of the present invention, with reference to the embodiment content that the present invention is furture elucidated, but the present invention
Content is not limited solely to the following examples.
In mining, raw material of the high-quality high-grade lime stone as manufacture of cement are usually preferentially selected, and it is right
In part, low-grade high-sulfur limestone tailing is given it up, and causes the wasting of resources and the production cost increases.Ge Zhou Ba Yicheng
High-sulfur lime stone accounting is larger in the affiliated limestone mine of Cement Co., Ltd, this part high-sulfur lime stone is stripped out, dew
It is stacked.It attempts to prepare Portland clinker using high-sulfur limestone tailing in production, as shown in Figure 1, untreated stone
Lime stone contains part high-sulfur lime stone, by sieving twice, primary fragmentation to granularity be 1-10 μm, can be fully by high-sulfur lime stone
Separated with fat lime stone, ensure in fat lime stone sulfur content as 0.1% and less, calcium content for 48% and more than, then lead to
It crosses conveying equipment to be uniformly mixed high-sulfur lime stone according to proper proportion with fat lime stone, is transported to lime clitter canopy.
Fat lime stone and the chemical composition of high-sulfur lime stone and each raw material used is shown in Table 1, can be seen by table 1
Go out, sulfur content is up to 2.34% in high-sulfur lime stone, and CaO content is 41.57%, cannot be former separately as calcium carbonate
Material；And sulfur content only has 0.1% in fat lime stone, and CaO content is 52.51%, meets manufacture of cement and CaO content is more than
48% requirement.It is used by high-sulfur lime stone and the collocation of fat lime stone, the harmful components such as sulphur can be reduced to controllable model
It in enclosing, and adjusts CaO content and reaches the required scope of production, realize the recycling in mine.
1 lime stone of table and each raw material chemical composition
Specific each embodiment is matched according to the proportion scheme shown in table 2.By raw meal proportioning, high-temperature firing,
Clinker is obtained after cooling, ensures Portland clinker rate value：Aluminium rate IM=1.8~2.1, lime saturation factor KM=
0.92-0.94, silicon rate SM=2.5-2.8, in sintering procedure high temperature calcining heat at 1480 DEG C, clinker cools down in grate-cooler
To+65 DEG C of environment temperature, the bypass system being had during clinker burning in preheater base portion is hourly
Exhausting amount is kiln system air quantity 5%.
2 raw-meal ingredient of table (%)
Using above-mentioned technical proposal, the clinker rate value and physical property being fired into are as shown in table 3.It can be sent out from table 3
Existing, after rational raw meal proportioning, clinker moduli control exists：KH=0.938, SM=2.61, IM=1.91, clinker mineral group
Into basically identical, the high alumina rate Portland clinker thus fired possesses good physical property, and clinker quality does not go out
Existing larger fluctuation, stable quality, setting time, normal consistency, 3 days intensity and 28 days intensity meet requirement.Implement
1~5 Minerals of example form C3S+C2S≤75%, C3A contents 9.4%, C4AF contents 8.4%, the rock of 3 clinker of embodiment
Facies analysis figure is as shown in Fig. 2, A ore deposit sizes are neat, and grain size is between 20~50 μm, in hexagonal plate or long column shape, surface and side
Rib is bright and clean；B ore deposits are in round shaped grain shape, see and intersect twin crystal line, size is neat, and grain size is at 40 μm or so；A ore deposits, B ore deposits are distributed together, therebetween
Substantially it is spaced among white, black；White interphase accounts for visual field ratio general 8% or so；Free CaO, periclase crystal
It is less, thus illustrate that clinker is had excellent performance.Thus adaptability, the physical property of all kinds of cement of grinding meet national standard and want
It asks.
3 embodiment clinker rate value of table and physical property
The bound value and interval value of each composition of raw materials of the present invention and rate value can realize the present invention, just differ herein
One enumerates embodiment, and protection scope of the present invention should be subject to claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, it can also make and be suitably modified and modify, but improve
Protection scope of the present invention is should be regarded as with the result of modification.
Claims (9)
1. a kind of Portland clinker, which is characterized in that the formula of the clinker is by high-sulfur lime stone, fat lime stone, sandstone,
Shale, tripoli composition；The proportioning of wherein each raw material is high-sulfur lime stone 0-35%, fat lime stone 50-87%, sandstone 7-10%, page
Rock 4-7%, tripoli 0.5-2%.
2. Portland clinker described in claim 1, which is characterized in that the sulfur content of the high-sulfur lime stone is 2-
3%, calcium content 40-42%.
3. Portland clinker described in claim 1, which is characterized in that the sulfur content of the fat lime stone is 0.1%
And it is following, calcium content for 48% and more than.
4. Portland clinker described in claim 1, which is characterized in that the high-sulfur lime stone and fat lime stone by
Mining area lime stone by sieving twice, primary fragmentation obtains, and high-sulfur lime stone and fat lime stone are by arranging in pairs or groups, after homogenizing processing
Into lime clitter canopy.
5. according to the Portland clinker described in right 1, which is characterized in that the clinker moduli is respectively：Aluminium rate IM=
1.8 ~ 2.1, lime saturation factor KM=0.92-0.94, silicon rate SM=2.5-2.8.
6. the preparation method of claim 1-5 any one of them Portland clinkers, which is characterized in that including walking as follows
Suddenly：
The first step, takes high-sulfur lime stone, fat lime stone mixture, sandstone, shale, and tripoli must mix after grinding is homogenized respectively
Raw material；
Second step by mixed raw material input precalciner system calcining, cools down by grate-cooler and high alumina rate clinker is made.
7. preparation method according to claim 5, it is characterised in that：1450-1500 DEG C of clinker burning temperature.
8. preparation method according to claim 5, it is characterised in that：Clinker is cooled to environment temperature 60-70 through grate-cooler
℃。
9. preparation method according to claim 5, it is characterised in that：Dore furnace lower part has bypass in precalciner system
Leak informaton system, exhausting amount hourly is kiln system air quantity 3-10%.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109399972A (en) * | 2018-11-22 | 2019-03-01 | 葛洲坝宜城水泥有限公司 | A kind of low alkali cement clinker and preparation method thereof |
| CN110357466A (en) * | 2019-06-27 | 2019-10-22 | 长安大学 | A kind of clinker preparation method |
| CN113185154A (en) * | 2021-01-11 | 2021-07-30 | 中国地质科学院矿产综合利用研究所 | Method for preparing cement clinker by using rare earth tailings |
| CN113264698A (en) * | 2021-07-05 | 2021-08-17 | 中材萍乡水泥有限公司 | Portland cement clinker comprehensively utilizing low-grade limestone and production process thereof |
| CN113983466A (en) * | 2021-11-01 | 2022-01-28 | 中国电力工程顾问集团华东电力设计院有限公司 | Method for treating fly ash by utilizing household garbage-silicon-aluminum material in cooperation with incineration ash |
| CN115448622A (en) * | 2022-09-16 | 2022-12-09 | 大冶尖峰水泥有限公司 | Method for producing high-strength clinker by using high-sulfur high-magnesium limestone |
| CN115745543A (en) * | 2022-11-16 | 2023-03-07 | 广东英凯建筑材料有限公司 | Decorative mortar plastic textured concave-convex texture coating and preparation method thereof |
| CN116161885A (en) * | 2023-02-07 | 2023-05-26 | 宜春红狮水泥有限公司 | Method for preparing silicate cement by using copper tailings |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109399972A (en) * | 2018-11-22 | 2019-03-01 | 葛洲坝宜城水泥有限公司 | A kind of low alkali cement clinker and preparation method thereof |
| CN110357466A (en) * | 2019-06-27 | 2019-10-22 | 长安大学 | A kind of clinker preparation method |
| CN110357466B (en) * | 2019-06-27 | 2021-11-30 | 长安大学 | Preparation method of cement clinker |
| CN113185154A (en) * | 2021-01-11 | 2021-07-30 | 中国地质科学院矿产综合利用研究所 | Method for preparing cement clinker by using rare earth tailings |
| CN113264698A (en) * | 2021-07-05 | 2021-08-17 | 中材萍乡水泥有限公司 | Portland cement clinker comprehensively utilizing low-grade limestone and production process thereof |
| CN113264698B (en) * | 2021-07-05 | 2022-07-26 | 中材萍乡水泥有限公司 | Portland cement clinker comprehensively utilizing low-grade limestone and production process thereof |
| CN113983466A (en) * | 2021-11-01 | 2022-01-28 | 中国电力工程顾问集团华东电力设计院有限公司 | Method for treating fly ash by utilizing household garbage-silicon-aluminum material in cooperation with incineration ash |
| CN115448622A (en) * | 2022-09-16 | 2022-12-09 | 大冶尖峰水泥有限公司 | Method for producing high-strength clinker by using high-sulfur high-magnesium limestone |
| CN115448622B (en) * | 2022-09-16 | 2023-09-22 | 大冶尖峰水泥有限公司 | Method for producing high-strength clinker by utilizing high-sulfur high-magnesium limestone |
| CN115745543A (en) * | 2022-11-16 | 2023-03-07 | 广东英凯建筑材料有限公司 | Decorative mortar plastic textured concave-convex texture coating and preparation method thereof |
| CN116161885A (en) * | 2023-02-07 | 2023-05-26 | 宜春红狮水泥有限公司 | Method for preparing silicate cement by using copper tailings |
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