CN107555816A - A kind of low-grade bauxite clinker - Google Patents
A kind of low-grade bauxite clinker Download PDFInfo
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- CN107555816A CN107555816A CN201710847132.1A CN201710847132A CN107555816A CN 107555816 A CN107555816 A CN 107555816A CN 201710847132 A CN201710847132 A CN 201710847132A CN 107555816 A CN107555816 A CN 107555816A
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Abstract
A kind of low-grade bauxite clinker, belongs to Portland clinker technical field.It is characterized in that：The weight of material is：81 ~ 84 parts of lime stone, 10 ~ 12.5 parts of sandstone, 3 ~ 4.5 parts of bauxite, 2.5 ~ 4 parts of copper ore powder；Quality percentage in described lime stone shared by CaO is 48.00%~50.00%；Al in described bauxite2O3Shared quality percentage is 18 ~ 20%；Fuel during material calcination of cement clinker is coal.The present invention combines the performance of two kinds of materials of high-grade bauxite and low-grade bauxite, realizes the low-grade bauxite dosage of maximum admixture low price, not only meets raw meal proportioning technological requirement, but also meets the needs of production 28d high strength clinkers.
Description
Technical field
A kind of low-grade bauxite clinker, belongs to Portland clinker technical field.
Background technology
Portland cement is the Portland clinker based on calcium silicates, less than 5% lime stone or granulated blast-furnace ore deposit
Slag, hydraulic cementing materials made of proper amount of gypsum is levigate, is referred to as portland cement, is referred to as Portland cement in the world.
Portland cement divides two types, is not spiked with the I type portland cement that is referred to as of mixing material, code name P I, and admixture is no more than water
The lime stone of shale amount 5% or the referred to as II type portland cement of granulated blast-furnace slag mixing material, code name P II.Silicate cement
Mud when mixed with water, occurs the physical and chemical reaction of complexity, is referred to as hydrated.After cement plus water mixes and stirs, turn into can
The cement mortar of plasticity, loses plasticity to the gradual retrogradation of cement mortar but not yet has intensity, and this process referred to as " condenses ".Then production
Raw obvious intensity is simultaneously developing progressively hard Behavior of Hardened Cement Paste, and this process is referred to as hardening.Condense and hardening artificially divide,
Actually one continuous physicochemical change process.
Portland clinker is mainly by SiO2、AL2O3、Fe2O3, tetra- kinds of oxides of CaO composition, it is every to contain these four oxygen
No matter natural the material of compound is or industry byproduct or other discarded objects, can all be used as clinker production raw material, as long as through
Cross reasonable dispensing and calcination operation, so that it may produce qualified clinker.Mainly adopted in Portland clinker production at present
With four component dispensings, it is respectively：Lime stone, sandstone, bauxite and copper ore powder.But the collocation of the material of this main flow is present substantially
Cost it is high, the defects of harmful components are high.
The content of the invention
The technical problem to be solved in the present invention is：Overcome the deficiencies in the prior art, there is provided one kind reduces cost, improves safety
The low-grade bauxite clinker of property.
The technical solution adopted for the present invention to solve the technical problems is：The low-grade bauxite clinker, its feature
It is：The weight of material is：81 ~ 84 parts of lime stone, 10 ~ 12.5 parts of sandstone, 3 ~ 4.5 parts of bauxite, copper ore powder 2.5 ~ 4
Part；Quality percentage in described lime stone shared by CaO is 48.00%~50.00%；Al in described bauxite2O3Shared matter
It is 18 ~ 20% to measure percentage.
For the present invention in order to produce high-quality clinker, the material proportion of use ensure that the silicate mineral of sufficient amount first
（C3S+ C2S）, ensure that the high-performance of Portland clinker.The high-performance of clinker is mainly manifested in 3d and 28d intensity, and
Clinker strength is influenceed by the chemical composition of clinker, mineral composition, mineral lithofacies structure, wherein C3S 、C2S、A3S、C4Tetra- kinds of AF
Essential mineral plays a major role to the performance of clinker.The design of clinker composition of the present invention is mainly by controlling clinker moduli（KH、
SM、IM）Realize.The dispensing of the present invention makes technology of the low-grade bauxite in clinker production to obtain in process of production
Applied to fine, not only suitable C3S and C2S contents, but also promising C3S formation, it is sinter leaching granularity（5-
25mm）Uniformly, it is easy to calcine, bulk and the not enough amount of liquid phase of ring formation offer and liquid phase viscosity is not provided.
In order to more reasonably select the compatibility of raw material, improve dispensing cost optimization and meet business economic operation
Principle, the present inventor's design, select Al in control bauxite2O3Content is proper 18 ~ 20%, can use high-grade
Bauxite uses with low-grade bauxite collocation, is ensuring Al2O3Under the premise of content, bauxite price is reduced.Not only meet raw material
Proportioning process requirement, and also reduced for raw meal proportioning sandstone dosage, process costs reduce, harmful chemical component alkali content
Within controlled range.
Preferably, the quality percentage in described lime stone shared by MgO is 2.00%~3.50%.Lime stone should ensure ripe
CaO content in material, MgO fluctuations are also reduced, sufficiently using mine resources, using the lime of different grades during actual dispensing
Stone reasonably combined use in proportion, improvement and stable raw meal proportioning.
Preferably, described bauxite is low-grade bauxite and high-grade bauxite in mass ratio 1：0.8 ~ 1.2 it is mixed
Close bauxite.Using high-grade bauxite and the low-grade reasonably combined use of aluminium vanadine, dispensing advantage of lower cost, and due to
Sandstone incorporation relatively reduces 0.33% using high-grade bauxite dispensing, can improve raw grinding efficiency, improves unit-hour output,
Grinding pow consumption is reduced, so as to reduce process costs.Raw material collocation is reasonable, quality and cost are taken into account.
Preferably, Al in described low-grade bauxite2O3Shared quality percentage is 14% ~ 16%.Pass through preferable low product
Al in bauxite2O3Content can preferably ensure the quality of cement.
Preferably, Al in described high-grade bauxite2O3Shared quality percentage is 22% ~ 25%.Pass through preferable Gao Pin
Al in bauxite2O3Content can more preferably ensure the quality of cement.
Preferably, Al in described bauxite2O3Shared quality percentage is 19.09%.
Fuel of the coal as Cement clinker buring, supply the heat needed for sinter leaching.But ash content contained therein, greatly
Part falls into clinker the composition and property for influenceing clinker, says from the side, and coal is production clinker again
A kind of " raw material ", therefore in order that low-grade bauxite in clinker production can Enough preferably apply, invention of the invention
People devises the index of the coal of the condition of satisfaction.Preferably, the index of bunker coal during material calcination of cement clinker be ash content≤
13.00%, volatile matter >=25.00%, S≤1.00%, calorific value >=5800KcaL/Kg, moisture≤13.00%.
Preferably, the weight of described material is：82 ~ 83 parts of lime stone, 10.5 ~ 11.5 parts of sandstone, bauxite
3.5 ~ 4 parts, 3 ~ 3.5 parts of copper ore powder.Preferable regulation of the material proportion to low-grade bauxite is more preferable, and the quality of product is more steady
Fixed, intensity is more preferable after solidification.
Compared with prior art, beneficial effect possessed by a kind of low-grade bauxite clinker of the invention is：This
Invention utilizes two kinds of material chemical component SiO with reference to the performance of two kinds of materials of high-grade bauxite and low-grade bauxite2With
Al2O3The difference of content, by dispensing, ensuring Al2O3Content meets on the premise of requiring, with high-grade bauxite and low product
Position bauxite collocation uses, by taking the managing of stable lime stone quality, coal-fired quality, feed proportioning optimization scheme：Strengthen life
Expect the implementation of the countermeasures such as the control of preparation process, realize the low-grade bauxite dosage of maximum admixture low price, it is not only full
Sufficient raw meal proportioning technological requirement, but also the needs of production 28d high strength clinkers are met, simultaneously because low-grade aluminium alum
Native SiO2It is higher, also reduced for raw meal proportioning sandstone dosage, process costs are greatly reduced, while harmful chemical component is also can
Within the scope of control.
Embodiment
With reference to specific embodiment, the present invention will be further described.
Embodiment 1
The weight of material is：82.32 parts of lime stone, 10.94 parts of sandstone, 3.69 parts of bauxite, 3.05 parts of copper ore powder；
Quality percentage in lime stone shared by CaO is 50.00%；Quality percentage shared by MgO is 2.00%；
Bauxite is the mixing bauxite of high-grade bauxite and low-grade bauxite：
；
The index of bunker coal during material calcination of cement clinker is ash content 11.00%, volatile matter 28.00%, S=0.70%, calorific value=
6200KcaL/Kg, moisture=11.00%；
Following table is the performance test of clinker made from this example：
。
Embodiment 2
The weight of material is：82 parts of lime stone, 11.5 parts of sandstone, 3.5 parts of bauxite, 3.5 parts of copper ore powder；
Quality percentage in lime stone shared by CaO is 50.00%；Quality percentage shared by MgO is 2.50%；
Bauxite is the mixing bauxite of high-grade bauxite and low-grade bauxite：
；
The index of bunker coal during material calcination of cement clinker is ash content=11.70%, volatile matter=27.20%, S=0.78%, calorific value=
6000KcaL/Kg, moisture=12.40%；
Following table is the performance test of clinker made from this example：
。
Embodiment 3
The weight of material is：83 parts of lime stone, 10.5 parts of sandstone, 4 parts of bauxite, 3 parts of copper ore powder；
Quality percentage in lime stone shared by CaO is 49%；Quality percentage shared by MgO is 3.00%；
Bauxite is the mixing bauxite of high-grade bauxite and low-grade bauxite：
；
The index of bunker coal during material calcination of cement clinker is ash content=12.00%, volatile matter=25.50%, S=0.80%, calorific value=
5800KcaL/Kg, moisture=13.00%；
Following table is the performance test of clinker made from this example：
。
Embodiment 4
The weight of material is：83.5 parts of lime stone, 10.5 parts of sandstone, 4.2 parts of bauxite, 2.9 parts of copper ore powder；
Quality percentage in lime stone shared by CaO is 48.5%；Quality percentage shared by MgO is 2.50%；
Bauxite is high-grade bauxite and low-grade bauxite in mass ratio 1：The mixing bauxite of 1 collocation, low product bauxite
Middle Al2O3Shared quality percentage is 14%, Al in high product bauxite2O3Shared quality percentage is 22%；Mix in bauxite
Al2O3Shared quality percentage is 18%；
The index of bunker coal during material calcination of cement clinker is ash content=13.00%, volatile matter=27.20%, S=0.80%, calorific value=
6000KcaL/Kg, moisture=12.00%；
Following table is the performance test of clinker made from this example：
。
Embodiment 5
The weight of material is：81 parts of lime stone, 12.5 parts of sandstone, 3 parts of bauxite, 4 parts of copper ore powder；
Quality percentage in lime stone shared by CaO is 48.00%；Quality percentage shared by MgO is 2. 35%；
Bauxite is low-grade bauxite and high-grade bauxite in mass ratio 1：The mixing bauxite of 0.8 collocation, low product aluminium alum
Al in soil2O3Shared quality percentage is 16%, Al in high product bauxite2O3Shared quality percentage is 25%；Mix in bauxite
Al2O3Shared quality percentage is 20%；
The index of bunker coal during material calcination of cement clinker is ash content=11.00%, volatile matter=27.00%, S=1.00%, calorific value=
5900KcaL/Kg, moisture=13.00%；
Following table is the performance test of clinker made from this example：
。
Embodiment 6
The weight of material is：84 parts of lime stone, 10 parts of sandstone, 4.5 parts of bauxite, 2.5 parts of copper ore powder；
Quality percentage in lime stone shared by CaO is 48.00%；Quality percentage shared by MgO is 3.50%；
Bauxite is low-grade bauxite and high-grade bauxite in mass ratio 1：The mixing bauxite of 1.2 collocation, low product aluminium alum
Al in soil2O3Shared quality percentage is 14%, Al in high product bauxite2O3Shared quality percentage is 22%；Mix in bauxite
Al2O3Shared quality percentage is 18.4%；
The index of bunker coal during material calcination of cement clinker is ash content=13.00%, volatile matter=25.00%, S=0.90%, calorific value=
5800KcaL/Kg, moisture=12.00%；
Following table is the performance test of clinker made from this example：
。
The present invention is found out using high-grade bauxite and low-grade bauxite dispensing production clinker physical analysis tables of data, raw
Clinker 3d and the 28d intensity of production are respectively averagely 31.3MPa, 55.6 Mpa, than only with low-grade bauxite dispensing 28d intensity
Averagely improve 2.2MPa.Due to the SiO of low-grade bauxite2The dosage of a part of sandstone is instead of, makes the sand for being most difficult to grinding
Rock dosage is reduced, and therefore, makes to greatly improve during raw mill platform, so as to reduce a ton raw material power consumption.
The above described is only a preferred embodiment of the present invention, being not the limitation for making other forms to the present invention, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But it is every without departing from technical solution of the present invention content, the technical spirit according to the present invention is to above example institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection domain of technical solution of the present invention.
Claims (8)
- A kind of 1. low-grade bauxite clinker, it is characterised in that：Weight is：81 ~ 84 parts of lime stone, sandstone 10 ~ 12.5 parts, 3 ~ 4.5 parts of bauxite, 2.5 ~ 4 parts of copper ore powder；Quality percentage in described lime stone shared by CaO for 48.00%~ 50.00%；Al in described bauxite2O3Shared quality percentage is 18% ~ 20%.
- A kind of 2. low-grade bauxite clinker according to claim 1, it is characterised in that：In described lime stone Quality percentage shared by MgO is 2.00%~3.50%.
- A kind of 3. low-grade bauxite clinker according to claim 1, it is characterised in that：Described bauxite is low Grade bauxite and high-grade bauxite in mass ratio 1：0.8 ~ 1.2 mixing bauxite.
- A kind of 4. low-grade bauxite clinker according to claim 3, it is characterised in that：Described low product bauxite Middle Al2O3Shared quality percentage is 14% ~ 16%.
- A kind of 5. low-grade bauxite clinker according to claim 3, it is characterised in that：Described high product bauxite Middle Al2O3Shared quality percentage is 22% ~ 25%.
- A kind of 6. low-grade bauxite clinker according to claim 1, it is characterised in that：In described bauxite Al2O3Shared quality percentage is 19.09%.
- A kind of 7. low-grade bauxite clinker according to claim 1, it is characterised in that：Material calcination of cement clinker When the index of bunker coal be ash content≤13.00%, volatile matter >=25.00%, S≤1.00%, calorific value >=5800KcaL/Kg, moisture ≤13.00%。
- A kind of 8. low-grade bauxite clinker according to claim 1, it is characterised in that：Described weight For：82 ~ 83 parts of lime stone, 10.5 ~ 11.5 parts of sandstone, 3.5 ~ 4 parts of bauxite, 3 ~ 3.5 parts of copper ore powder.
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Cited By (2)
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| CN111635152A (en) * | 2020-06-04 | 2020-09-08 | 武汉三源特种建材有限责任公司 | High belite sulphoaluminate cement clinker and preparation method thereof |
| CN114702258A (en) * | 2022-04-19 | 2022-07-05 | 枣庄中联水泥有限公司 | Raw material proportioning process |
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Application publication date: 20180109 |