CN104310820B - A kind of method utilizing five yuan of mineral facies systems to prepare sulphoaluminate cement clinker - Google Patents
A kind of method utilizing five yuan of mineral facies systems to prepare sulphoaluminate cement clinker Download PDFInfo
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- CN104310820B CN104310820B CN201410532393.0A CN201410532393A CN104310820B CN 104310820 B CN104310820 B CN 104310820B CN 201410532393 A CN201410532393 A CN 201410532393A CN 104310820 B CN104310820 B CN 104310820B
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- sulphoaluminate cement
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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
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
Abstract
The present invention relates to a kind of method utilizing five yuan of mineral facies systems to prepare sulphoaluminate cement clinker.Under conditions of without fluorite, utilize CaO SiO2‑Al2O3‑Fe2O3‑SO3Multicomponent system prepares Alite-sulphoaluminate grog, following steps obtain: (1) basicity factor [(CaO+MgO)/(SiO2+Al2O3)] it is 1.42, aluminium-sulfur ratio Al2O3/SO3It is 1.73；(2) limestone 75～80%, sandstone 5～7%, flyash 1～2%, low-grade bauxite 6～10%, Gypsum Fibrosum 5～8% mix homogeneously, tabletting, put into high temperature furnace and be fired；(3) at low temperature oven 950 DEG C, it is incubated 30min, directly goes in the high temperature furnace of 1450 DEG C, be incubated 40min, be cooled to 1300 DEG C with stove, be incubated 40min, in 30min, be cooled to room temperature after taking out, obtain C3S andThe CaO SiO coexisted2‑Al2O3‑Fe2O3‑SO3Multicomponent system clinker, has early strength high, and later strength is without the advantage of retraction.
Description
Invention field
The present invention relates to one and utilize CaO-SiO2-Al2O3-Fe2O3-SO3Multicomponent system fires A Li
The preparation method of spy-sulphoaluminate cement clinker.
Background technology
Cement industry is the energy, resource consumption intensive industry, is demand on ore amount, CO2Discharge is relatively
One of big key industry, along with becoming increasingly conspicuous of environmental problem, China pays much attention to energy-saving and emission-reduction work
Make, and reduce the energy expenditure in cement production process, reduce CO2 emission, subtract for energy-conservation
Arrange significant.Reduction of discharging is mainly reflected in reduction CaCO3Consumption, energy-conservation be primarily referred to as reducing ripe
Material calcining heat, reduces Ore consumption, utilizes industrial residue to replace natural resources.And it is energy-conservation in guarantee
On the premise of reduction of discharging, how preparing the good cement of performance is also that cement industry realizes green building material and wanted
One of problem considered.
In multicomponent system, forefathers have been prepared for multiple high-performance cement, such as belite-sulfur aluminic acid
Salt cement.But utilize CaO-SiO2-Al2O3-Fe2O3-SO3Quinary system prepares alite-sulfur aluminum
Its correlational study of acid salt cement aspect is less, and this is owing to being difficulty with C3S-phase andCoexist mutually.
Portland cement and sulphate aluminium cement are combined by ante-sulphoaluminate cement, contain simultaneously
There is C3S-phase andPhase, it is on the low side that it not only solves Portland cement early strength, burns till
The problem that temperature is higher, also overcomes sulphate aluminium cement later strength enhancement rate low simultaneously, even falls
The shortcomings such as contracting；Due to C3S-phase starts a large amount of formation at 1400 DEG C, andAt 1200～1300 DEG C
Formed, start during more than 1350 DEG C to decompose, coexist to realize the two, in existing technology,
The method adding flux and mineralizer is generally used to reduce C3The formation temperature of S-phase, as by adding
Add fluorite to realize C3S-phase andCoexist mutually.
Fluorite is as a kind of mineralizer, it is possible to reduce the sintering temperature of furnace charge, but fluorite hardness is relatively low,
And property is crisp so that its hardness of concrete and the toughness that mix fluorite have declined；The mixing of fluorite simultaneously
Entering to add the generation of many toxicity fluorides such as HF, this causes the biggest harm to environment, because of
This develops the constant ante-sulphoaluminate cement of performance under conditions of without fluorite is very
Significant.The present invention is without CaF2Under conditions of by first heat up formed C3S-phase is then
Cooling re-formsPhase, it is achieved C3S-phase andCoexisting of phase, this is to cement industry environment
Friendly purpose is made that tremendous contribution, is the most also few simultaneously.
Forefathers use first by temperature in the dynamics research to ante-sulphoaluminate cement forming process
It is increased to 1450 DEG C, then down to low temperature, continues to be heated to from low temperatureThe side formed mutually
Case, the program consumes the substantial amounts of energy in preparation process, does not meets cement industry energy-saving and emission-reduction
Requirement, therefore present invention basis based on this dynamics research, straight after temperature is increased to 1450 DEG C
Connecing and be cooled to 1300 DEG C, insulation 40min obtains ante-sulphoaluminate cement.Therefore this invention exists
Not using fluorite, reduce saving energy aspect significant, this result is for utilizing simultaneously
CaO-SiO2-Al2O3-Fe2O3-SO3Multicomponent system prepares ante-sulphoaluminate cement to be had the biggest
Effect.
Summary of the invention
The present invention utilizes CaO-SiO2-Al2O3-Fe2O3-SO3Multicomponent system is at the bar without fluorite
Ante-sulphoaluminate cement is prepared, mainly by proportioning raw materials, firing the change of scheme under part
Realize.This is prepared scheme and uses the scheme lowered the temperature afterwards that first heats up successfully to prepare target product, simultaneously
In target product, free calcium oxide is relatively low, and this has good shadow to the stability in clinker later stage
Ring.
The present invention realizes by the following technical solutions:
The present invention utilizes limestone, sandstone, flyash, low-grade bauxite, and Gypsum Fibrosum is as reality
Test raw material, it is carried out grinding, to particle diameter less than 0.08mm；According to basicity factor
[(CaO+MgO)/(SiO2+Al2O3)] (mass ratio) be 1.42, aluminium-sulfur ratio (mass ratio) Al2O3/SO3
It is 1.73 to carry out dispensing, tests raw-material content by weight, including:
Limestone 75～80%,
Sandstone 5～7%,
Flyash 1～2%,
Low-grade bauxite 6～10%, wherein Al2O3Mass percent is 42.2～46.5%
Gypsum Fibrosum 5～7%.
In this technical scheme, it is fired as follows:
The first step: limestone, sandstone, flyash, low-grade bauxite and Gypsum Fibrosum are joined according to set
Ratio mix homogeneously, standby；
Second step: the raw material prepared are added the distilled water mix of raw material gross mass 10% uniformly, then
Weighing the material of 5g to pour into and be pressed into little pat in tablet machine, standby examination is burnt used；
3rd step: the little pat that suppresses is incubated 30min the low temperature oven of 950 DEG C, directly goes to
In the high temperature furnace of 1450 DEG C, it is incubated 40min, is cooled to 1300 DEG C with stove, be incubated 40min, take out
After in 30min, be cooled to room temperature, obtain C3S andCoexist
CaO-SiO2-Al2O3-Fe2O3-SO3Multicomponent system cement somehow；
Ultimate principle:
C3S-phase andCoexist principle mutually: under conditions of fluxless and mineralizer,'s
Form temperature and be generally 1200～1300 DEG C, when more than 1350 DEG C,Start to decompose,
Fast decoupled during higher than 1400 DEG C, and C3S is then to be formed the most in a large number at 1400 DEG C.By to alite
The dynamics research of-sulphate aluminium cement forming process, finds along with temperature raises,Phase decomposition,
But this phase can be re-formed again when cooling.Therefore to realize C3S-phase andCoexist, I
Use and be first warming up to 1450 DEG C, form C3S-phase, is then cooled to 1300 DEG C with stove, re-formsPhase.
Detailed description of the invention
Embodiment 1: by the limestone of 78%, the sandstone of 6%, the flyash of 1.5%, 8.5% low
Grade aluminum Alumina (Al2O3Mass percent is 45.9%), and the Gypsum Fibrosum mix homogeneously of 6%；Add
The distilled water mix entering raw meal quality 10% is uniform, makes the low temperature oven at 950 DEG C after little pat is dried
Insulation 30min, directly goes in the high temperature furnace of 1450 DEG C, is incubated 40min, is cooled to 1300 DEG C with stove,
Insulation 40min, is cooled to room temperature in 30min after taking out, under conditions of without fluorite,
To C3S andThe CaO-SiO coexisted2-Al2O3-Fe2O3-SO3Multicomponent system clinker.Survey
Its 3d comprcssive strength be 53.8MPa, 7d comprcssive strength be 57.9MPa, within 28 days, comprcssive strength is
73.6MPa, therefore grog has reached early strength height, and later strength is without the effect of retraction.
Embodiment 2: by the limestone of 75%, the sandstone of 7%, the flyash of 2%, the low product of 10%
Position bauxite (Al2O3Mass percent is 42.2%), and the Gypsum Fibrosum mix homogeneously of 6%；And add
The distilled water mix entering raw meal quality 10% is uniform, makes the low temperature oven at 950 DEG C after little pat is dried
Insulation 30min, directly goes in the high temperature furnace of 1450 DEG C, is incubated 40min, is cooled to 1300 DEG C with stove,
Insulation 40min, is cooled to room temperature in 30min after taking out, under conditions of without fluorite,
To C3S andThe CaO-SiO coexisted2-Al2O3-Fe2O3-SO3Multicomponent system clinker.Its
Middle C3The content of S relatively example 1 has declined,Content risen.Survey its 3d resistance to compression
Intensity be 52.3MPa, 7d comprcssive strength be 58.5MPa, 28 days comprcssive strength is 71.3MPa, its
It is high that grog has reached early strength, and later strength is without the effect of retraction.
Embodiment 3: by the limestone of 80%, the sandstone of 5%, the flyash of 1%, 7% low-grade
Bauxite (Al2O3Mass percent is 46.5%), and the Gypsum Fibrosum mix homogeneously of 7%；And add
The distilled water mix of raw meal quality 10% is uniform, makes the low temperature oven guarantor at 950 DEG C after little pat is dried
Temperature 30min, directly goes in the high temperature furnace of 1450 DEG C, is incubated 40min, is cooled to 1300 DEG C with stove,
Insulation 40min, is cooled to room temperature in 30min, under conditions of without fluorite, obtains after taking out
C3S andThe CaO-SiO coexisted2-Al2O3-Fe2O3-SO3Multicomponent system clinker.Wherein
C3The content of S relatively example 2 has declined,Content risen.Survey its 3d comprcssive strength
Being 60.2MPa for 55.7MPa, 7d comprcssive strength, 28 days comprcssive strength is 75.4MPa, and its grog reaches
Having arrived early strength high, later strength is without the effect of retraction.
Claims (2)
1. one kind utilizes sulphoaluminate cement clinker prepared by five yuan of mineral facies systems, it is characterised in that: its raw material content by weight, including:
Limestone 75～80%,
Sandstone 5～7%,
Flyash 1～2%,
Bauxite 6～10%,
Gypsum Fibrosum 5～7%
；
Wherein Al in bauxite2O3Mass percent is 42.2～46.5%.
2. the method preparing sulphoaluminate cement clinker as claimed in claim 1, comprises the steps:
The first step: by limestone, sandstone, flyash, bauxite and Gypsum Fibrosum by described proportioning mix homogeneously, standby；
Second step: the distilled water mix that the raw material that prepare add raw meal quality 10% is uniform, then weighs the material of 5g and pours into and be pressed into little pat in tablet machine, and standby examination is burnt used；
3rd step: the little pat that suppresses is incubated 30min the low temperature oven of 950 DEG C, directly goes in the high temperature furnace of 1450 DEG C, be incubated 40min, be cooled to 1300 DEG C with stove, be incubated 40min, be cooled to room temperature after taking out in 30min, obtain C3S andThe CaO-SiO coexisted2-Al2O3-Fe2O3-SO3Multicomponent system clinker.
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| CN105621908B (en) * | 2016-01-11 | 2017-11-10 | 枣庄中联水泥有限公司 | A kind of low firing temperature, low energy consumption and high strength clinker |
| CN106630704A (en) * | 2017-01-04 | 2017-05-10 | 济南大学 | Belite-calcium sulphoaluminate cement clinker and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101717209A (en) * | 2009-11-13 | 2010-06-02 | 南京工业大学 | Secondary synthesis method of calcium sulfoaluminate minerals in metasilicate cement clinker |
| WO2011158109A1 (en) * | 2010-06-18 | 2011-12-22 | Cemex Research Group Ag | Clinker and method for preparing a hydraulic cement with low co2 emission and high resistance |
| CN102936104A (en) * | 2012-10-31 | 2013-02-20 | 天津中材工程研究中心有限公司 | Method for preparing rapid hardening high-early-strength cement clinker |
| CN103232176A (en) * | 2013-04-19 | 2013-08-07 | 南京工业大学 | High-strength silicate cement clinker and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101717209A (en) * | 2009-11-13 | 2010-06-02 | 南京工业大学 | Secondary synthesis method of calcium sulfoaluminate minerals in metasilicate cement clinker |
| WO2011158109A1 (en) * | 2010-06-18 | 2011-12-22 | Cemex Research Group Ag | Clinker and method for preparing a hydraulic cement with low co2 emission and high resistance |
| CN102936104A (en) * | 2012-10-31 | 2013-02-20 | 天津中材工程研究中心有限公司 | Method for preparing rapid hardening high-early-strength cement clinker |
| CN103232176A (en) * | 2013-04-19 | 2013-08-07 | 南京工业大学 | High-strength silicate cement clinker and preparation method thereof |
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