CN109369044A - A kind of sulphate aluminium cement and preparation method thereof - Google Patents
A kind of sulphate aluminium cement and preparation method thereof Download PDFInfo
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- CN109369044A CN109369044A CN201811430478.2A CN201811430478A CN109369044A CN 109369044 A CN109369044 A CN 109369044A CN 201811430478 A CN201811430478 A CN 201811430478A CN 109369044 A CN109369044 A CN 109369044A
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- sulphate aluminium
- lithium
- aluminium cement
- clinker
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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
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
- C04B7/42—Active ingredients added before, or during, the burning process
- C04B7/421—Inorganic materials
- C04B7/424—Oxides, Hydroxides
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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
- C04B7/32—Aluminous cements
-
- 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
- C04B7/42—Active ingredients added before, or during, the burning process
- C04B7/421—Inorganic materials
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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
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
- C04B7/42—Active ingredients added before, or during, the burning process
- C04B7/421—Inorganic materials
- C04B7/425—Acids or salts thereof
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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
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a kind of preparation methods of sulphate aluminium cement comprising: the raw material of sulphate aluminium cement is chosen, the raw material grinding is obtained into raw meal powder including the substance containing elemental lithium, then through 1200-1350 DEG C of calcining 30min, obtains clinker；The clinker is mixed with anhydrite, grinding obtains sulphate aluminium cement；It is calculated in mass percent, the clinker includes: anhydrous calcium sulphoaluminate: 30-80%, dicalcium silicate: 10-40%, ferrite mineral: 5-20%, dissociate gypsum: 0-15%, perovskite: 0-5%, free calcium oxide: 0-3%, lithia: 0.06-0.8% and boron oxide: 0-0.5%.Lithium salts or boric acid (salt) can be dispersed in cement by the method for the present invention, to play its effect to the greatest extent can improve the early strength of sulphate aluminium cement by synchronous release when it is reacted with water.The present invention can use the waste material of boracic containing lithium as raw material, can be given up while cost is reduced with benefit.
Description
Technical field
The present invention relates to the field of building materials, more particularly to a kind of sulphate aluminium cement and preparation method thereof.
Background technique
Sulphate aluminium cement is output maximum, most widely used a kind of cement in addition to portland cement.With silicic acid
Salt cement is compared, and sulphate aluminium cement has the outstanding advantage that quickly grows of Early-age behavior, therefore in repairing, rapid construction, low
The special construction field such as temperature or subzero temperature construct has a wide range of applications.Although sulphate aluminium cement has the feature of high-early-strength,
But increasingly diversified construction demand, such as repairing, leak stopping can not be fully met by only relying on sulphate aluminium cement itself.Cause
This, there is still a need for additive is added to carry out performance regulation in use for sulphate aluminium cement.
Lithium salts and boric acid (salt) are generally acknowledged at present maximally efficient to sulphate aluminium cement early strength and setting time adjusting
Two class extraneous components, the former can promote it to condense and increase early strength, and the latter then has deferred action to it.However, this
A little extraneous components are usually to be added during cement applications, it is difficult to be fully mixed uniformly, and these two types of extraneous component solubility
Or rate of dissolution is lower, this causes hydrated cementitious rate and extraneous component to act on opportunity mismatch, and then performance shakiness often occurs
Fixed situation, or even there is performance accident.In addition, what the lithium salts and boric acid (salt) as extraneous component generally used is all chemical industry
Raw material, higher cost.
Summary of the invention
It is a primary object of the present invention to provide a kind of sulphate aluminium cement and preparation method thereof, technology to be solved
Problem is lithium salts can be allowed to be uniformly distributed in cement, and the synchronous release in hydration process, cooperates with hydrated cementitious and lithium salts etc.
Extraneous component mechanism utmostly plays its effect, the early strength of sulphate aluminium cement is improved, thus more suitable for reality
With.
The object of the invention to solve the technical problems adopts the following technical solutions to realize.
A kind of preparation method of sulphate aluminium cement proposed according to the present invention, comprising:
The raw material for choosing sulphate aluminium cement, wherein the raw material includes the substance containing elemental lithium, by the raw material grinding,
Obtain raw meal powder；Then through 1200-1350 DEG C of calcining 30min, clinker is obtained；
The clinker is mixed with anhydrite, grinding obtains sulphate aluminium cement；
It is calculated in mass percent, the clinker includes:
Anhydrous calcium sulphoaluminate: 30-80%, dicalcium silicate: 10-40%, ferrite mineral: 5-20%, dissociate gypsum: 0-
15%, perovskite: 0-5%, free calcium oxide: 0-3% and lithia: 0.06-0.8%.
The object of the invention to solve the technical problems also can be used following technical measures and further realize.
Preferably, the preparation method of sulphate aluminium cement above-mentioned, wherein the substance containing elemental lithium is lithium salts and contains
At least one of lithium waste material.
Preferably, the preparation method of sulphate aluminium cement above-mentioned, wherein the lithium salts is lithium carbonate, lithium sulfate, nitric acid
Lithium or lithium chloride；Or, the waste material containing lithium is lithium slag or tailing containing lithium.
Preferably, the preparation method of sulphate aluminium cement above-mentioned, wherein the raw material further includes the substance containing boron element.
Preferably, the preparation method of sulphate aluminium cement above-mentioned, wherein the substance of the boracic element is boric acid, boron
At least one of cash, borate and boracic waste material.
Preferably, the preparation method of sulphate aluminium cement above-mentioned, wherein the borate be sodium tetraborate, line borate or
Antifungin；Or, the boracic waste material is boracic waste residue or boracic tailing.
Preferably, the preparation method of sulphate aluminium cement above-mentioned, wherein the clinker further include: boron oxide, with
Mass percentage, content are not more than 0.5%.
Preferably, the preparation method of sulphate aluminium cement above-mentioned, wherein the matter of the clinker and the anhydrite
Amount is than being 80-90:10-20.
Also the following technical solution is employed for the object of the invention to solve the technical problems to realize.
A kind of sulphate aluminium cement proposed according to the present invention, including clinker and gypsum,
Wherein, the mass ratio of the clinker and the anhydrite is 80-90:10-20；
It is calculated in mass percent, the clinker includes:
Anhydrous calcium sulphoaluminate: 30-80%, dicalcium silicate: 10-40%, ferrite mineral: 5-20%, dissociate gypsum: 0-
15%, perovskite: 0-5%, free calcium oxide: 0-3%, lithia: 0.06-0.8% and boron oxide: 0-0.5%.
The object of the invention to solve the technical problems also can be used following technical measures and further realize.
Preferably, sulphate aluminium cement above-mentioned, wherein 2 hours intensity of the sulphate aluminium cement be 12-17MPa, 4
Hour intensity is 20-28MPa, and 1 day intensity is 35-40MPa.
By above-mentioned technical proposal, a kind of sulphate aluminium cement proposed by the present invention and preparation method thereof at least has following
Advantage:
1, the substance containing elemental lithium is first added in the raw material of sulphate aluminium cement by the present invention, then calcines to obtain cement ripe
Material；The clinker is mixed with anhydrite finally, obtains sulphate aluminium cement；This method is the life in sulphate aluminium cement
The substance containing elemental lithium is added in material, in high-temperature calcination, elemental lithium can be solid-solubilized in cement molten mass, divide lithium salts uniformly
It is dispersed in sulphate aluminium cement product.Lithium in cement slurry can directly participate in firing reaction in comparison studies on formation of cement clinker,
Clinker mineral is formed, and is finally solid-solubilized in clinker mineral.The cement prepared by clinker containing lithium only adds water i.e. in application
Can, this is not only convenient for user's use, quality control is more advantageous to, because avoiding extraneous component mixes uneven, extraneous component
The problems such as quality fluctuation.The cement prepared by clinker containing lithium, during aquation occurs with water mix, the elements such as lithium are in clinker
It is discharged while mineral aquation, and then can effectively play its function of adjusting aquation, improve the early strength of sulphate aluminium cement.
The technical solution avoids clinker mineral aquation and extraneous component rate of release mismatch and extraneous component quality fluctuation etc. and causes
Quality problems, can be effectively improved and regulate and control the quality of sulphate aluminium cement.It is demonstrated experimentally that the aluminium sulfate water that the present invention obtains
2 hours intensity of mud are 12-17MPa, and 4 hours intensity is 20-28MPa, and 1 day intensity is 35-40MPa.
2, the substance containing elemental lithium is added in the present invention in the raw material of sulphate aluminium cement, is not intended to limit coming for elemental lithium
Source not only can use source of the industrial chemicals as lithium, can also be using lithium slag as raw material, and the present invention is in aluminium sulfate water
The substance containing boron element can also be added in the raw material of mud, also do not limit the source of boron element, not only can use industrial chemicals
, can also be using boron slag as raw material as the source of boron, it while cost is reduced can be useless with benefit.
3, the present invention can add suitable elemental lithium and boron element in the raw material of sulphate aluminium cement according to actual needs,
The setting time of sulphate aluminium cement is adjusted, will not only it be made to condense rapidly, but also its slow setting will not be made to lose early strong too long
Performance, to meet increasingly diversified construction demand, such as repairing, leak stopping.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, with presently preferred embodiments of the present invention, detailed description is as follows below.
Specific embodiment
It is of the invention to reach the technical means and efficacy that predetermined goal of the invention is taken further to illustrate, below in conjunction with
Preferred embodiment, to a kind of sulphate aluminium cement proposed according to the present invention and preparation method thereof its specific embodiment, structure,
Feature and its effect, detailed description is as follows.In the following description, what different " embodiment " or " embodiment " referred to is not necessarily
The same embodiment.In addition, the special characteristic, structure or feature in one or more embodiments can be combined by any suitable form.
The present invention provides a kind of preparation methods of sulphate aluminium cement, specifically includes the following steps:
(1) raw material for choosing sulphate aluminium cement, wherein the raw material includes the substance containing elemental lithium, by the raw material powder
Mill, obtains raw meal powder；Then through 1200-1350 DEG C of calcining 30min, clinker is obtained；
(2) clinker is mixed with anhydrite, grinding obtains sulphate aluminium cement；
It is calculated in mass percent, the clinker includes:
Anhydrous calcium sulphoaluminate: 30-80%, dicalcium silicate: 10-40%, ferrite mineral: 5-20%, dissociate gypsum: 0-
15%, perovskite: 0-5%, free calcium oxide: 0-3% and lithia: 0.06-0.8%.
The present invention does not do specific restriction to the raw material of sulphate aluminium cement, and preferably conventional sulphate aluminium cement production is used
Raw material, the raw material of conventional sulphate aluminium cement include: lime stone, alumina, gypsum etc., according to the needs of use, some aluminium sulfates
It further include iron ore etc. in the raw material of cement.
Further, the substance containing elemental lithium is at least one of lithium salts and waste material containing lithium.
Preferably, the lithium salts is lithium carbonate, lithium sulfate, lithium nitrate or lithium chloride.
It is furthermore preferred that the lithium salts is lithium carbonate.
Preferably, the waste material containing lithium is lithium slag or tailing containing lithium.
It is furthermore preferred that the waste material containing lithium is lithium slag.
At present in technology, replace part of cement as the application of cement admixture lithium ground-slag although also having, it is existing
Technology is mainly the unformed SiO for utilizing the greater activity contained in lithium slag2And Al2O3Pozzolanic activity with higher, this hair
It is bright mainly to utilize the elemental lithium in lithium slag；And the prior art is added in clinker using lithium slag as admixture, this
Invention is will to contain elemental lithium (including lithium slag) to be added in cement slurry, while utilizing the unformed of the greater activity contained in lithium slag
SiO2And Al2O3Pozzolanic activity with higher.The principle of the two has very big difference.
Substance containing elemental lithium is first added in the raw material of sulphate aluminium cement by the present invention, then calcines to obtain cement ripe
Material；The clinker is mixed with anhydrite finally, obtains sulphate aluminium cement；This method is the life in sulphate aluminium cement
The substance containing elemental lithium is added in material, in high-temperature calcination, elemental lithium can be solid-solubilized in cement molten mass, into clinker mineral
Lattice in, be dispersed in lithium salts in sulphate aluminium cement product.Lithium in cement slurry is in comparison studies on formation of cement clinker
In can directly participate in firing reaction, the conventional ions synchronous release such as lithium and calcium, sulphur, formation clinker mineral and is finally solid-solubilized in ripe
Expect in mineral.The cement prepared by clinker containing lithium only adds water in application, this is not only convenient for user's use, more favorably
It is controlled in quality, because of the problems such as avoiding uneven extraneous component mixing, extraneous component quality fluctuation.It is prepared by clinker containing lithium
Cement, with water mix occur aquation during, the elements such as lithium discharge while clinker mineral aquation, and then can be effective
Its function of adjusting aquation is played, the early strength of sulphate aluminium cement is improved.The technical solution avoids clinker mineral aquation
With extraneous component rate of release mismatch and extraneous component quality fluctuation etc. caused by quality problems, can be effectively improved and regulate and control sulphur
The quality of aluminate cement.Its function of adjusting aquation is effectively played, the early strength of sulphate aluminium cement is improved.
It is demonstrated experimentally that 2 hours intensity of the sulphate aluminium cement that the present invention obtains are 12-17MPa, 4 hours intensity is 20-
28MPa, 1 day intensity are 35-40MPa.
What the present invention was added in the raw material of sulphate aluminium cement is the substance containing elemental lithium, and the present invention is to containing elemental lithium
Substance with no restrictions, as long as the substance containing elemental lithium can meet condition of the invention；The source of elemental lithium is not limited yet,
It not only can use source of the industrial chemicals as lithium, can also may be used also while cost is reduced using lithium slag as raw material
It is useless with benefit.
As preferred embodiment, the raw material further includes the substance containing boron element.
Further, the substance containing boron element is at least one of boric acid, boron cash, borate and boracic waste material.
Preferably, the borate is sodium tetraborate, line borate or antifungin；The boracic waste material is boracic waste residue or contains
Boron tailing.
It is furthermore preferred that the borate is sodium tetraborate, it is commonly called as borax.
What the present invention was added in the raw material of sulphate aluminium cement is the substance containing boron element, and the present invention is to containing boron element
Substance with no restrictions, as long as the substance containing boron element can meet condition of the invention；The source of boron element is not limited yet,
It not only can use source of the industrial chemicals as boron, can also may be used also while cost is reduced using boron slag as raw material
It is useless with benefit.
Substance containing boron element is first added in the raw material of sulphate aluminium cement by the present invention, then calcines to obtain cement ripe
Material；This method is to be added in the raw material of sulphate aluminium cement by the substance containing boron element, and in high-temperature calcination, boron element can
Into in the network of cement, boric acid (salt) can be made to be dispersed in cement.The effect of boron is that one side is to enter silicon
In hydrochlorate mineral, activated silicates mineral, on the other hand its with can delay calcium sulphoaluminate aquation, extend the solidifying of sulphate aluminium cement
The time is tied, the fresh concrete long period is made to keep plasticity, facilitates casting, improves construction.With lithium collective effect, boric acid (salt) energy
Enough regulate and control cement early hydration speed and setting time.
In sulphate aluminium cement preparation process, micro Li is introduced by addition industrial reagent or using waste residue2O or
Li2O+B2O3.The introducing of microcomponent can not only promote the sintering process of clinker, more importantly these microcomponents are solid
It dissolves into the lattice of clinker mineral, in hydrated cementitious with the conventional ions synchronous release such as calcium, sulphur, the most efficiently plays it
Promote the effect of aquation.
Lithium salts can promote sulphate aluminium cement to condense and increase early strength, and boric acid (salt) has sulphate aluminium cement slow
Solidifying effect achievees the purpose that adjust setting time, and in sulphate aluminium cement use process, according to actual needs, addition is appropriate
Lithium salts and boric acid (salt) will not only it be made to condense rapidly to adjust the setting time of sulphate aluminium cement, but also it will not be made slow
It is solidifying to lose early epistasis energy too long, to meet increasingly diversified construction demand, such as repairing, leak stopping.
Preferably, the mass ratio of the clinker and the anhydrite is 80-90:10-20.
The condensation hardening that cement is adjusted in gypsum is added in the mass ratio for adjusting clinker and anhydrite according to actual needs
Speed.When if do not mixed gypsum or gypsum addition deficiency, wink coagulation phenomena can occur for cement.If but gypsum addition is excessive, can promote
Accelerate cement setting, while also the swelling cracking of Behavior of Hardened Cement Paste can be caused to destroy in the later period.
The present invention also provides a kind of sulphate aluminium cements comprising clinker and gypsum,
Wherein, the mass ratio of the clinker and the anhydrite is 80-90:10-20；
It is calculated in mass percent, the clinker includes:
Anhydrous calcium sulphoaluminate (C4A3$): 30-80%, dicalcium silicate (C2S): 10-40%, ferrite mineral (C4AF): 5-
20%, dissociate gypsum: 0-15%, perovskite (CT): 0-5%, free calcium oxide: 0-3%, lithia (Li2O): 0.06-
0.8%, boron oxide (B2O3): 0-0.5%.
Preferably, 2 hours intensity of the sulphate aluminium cement are 12-17MPa, and 4 hours intensity is 20-28MPa, 1 day
Intensity is 35-40MPa.
Specific detailed description is done to the present invention below with reference to embodiment.Embodiment is under the premise of the technical scheme of the present invention
Implemented, the detailed implementation method and specific operation process are given for following embodiment, but protection scope of the present invention is not
It is limited to following embodiments.Method therefor is conventional method unless otherwise instructed in following embodiments.
Embodiment 1
A kind of preparation method of sulphate aluminium cement, comprising the following steps:
(1) using lime stone, alumina, anhydrite, lithium slag as raw material, the concrete component of each raw material is shown in Table 1, by lime stone 60
4 parts of part, 28 parts of alumina, 8 parts of anhydrite, lithium slag proportion mixing, with laboratory ball mill grinding at raw meal powder；
(2) add 6-8% water to stir evenly raw meal powder, be pressed into raw material cake, and dry；
(3) by raw material cake in 950 DEG C of Muffle furnace pre-burning 30min, be then transferred in 1300 DEG C of high-temperature electric resistance furnace, keep the temperature
It 1 hour, takes out, and wind is cooled to room temperature, clinker is made；
(4) clinker and anhydrite are mixed in the ratio of 85:15, grinding to specific surface area is 400cm2/kg, and water is made
Mud.
1 raw material chemical constituent (%) of table
| Component | Loss | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | TiO2 | K2O | Na2O | SO3 | Li2O | Total |
| Lime stone | 41.25 | 3.62 | 0.95 | 0.41 | 52.68 | 0.31 | - | 0.17 | - | - | - | 99.39 |
| Alumina | 12.6 | 12.34 | 60.53 | 8.5 | 0.17 | 0.46 | 2.04 | - | 0.52 | 1.8 | - | 98.96 |
| Anhydrite | 7.36 | 1.38 | 0.92 | 0.21 | 36.45 | 3.06 | - | - | 0.1 | 49.12 | - | 98.6 |
| Lithium slag | 7.23 | 58.2 | 18.65 | 1.44 | 6.68 | 0.73 | - | 0.48 | - | 5.2 | 1.28 | 99.89 |
Embodiment 2
A kind of preparation method of sulphate aluminium cement, comprising the following steps:
(1) using lime stone, alumina, desulfurized gypsum as main raw material(s), using industrial level lithium carbonate and borax as addition
The concrete component of agent, each raw material and additive is shown in Table 2；By 55 parts of lime stone, 32 parts of alumina, 12.3 parts of desulfurized gypsum, lithium carbonate
0.5 part, the mixing of 0.2 part of borax of proportion, then together grinding at raw meal powder；
(2) add 6-8% water to stir evenly raw meal powder, be pressed into raw material cake, and dry；
(3) by raw material cake in 950 DEG C of Muffle furnace pre-burning 30min, be then transferred in 1280 DEG C of high-temperature electric resistance furnace, keep the temperature
It 1 hour, takes out, and wind is cooled to room temperature, clinker is made；
(4) clinker and anhydrite are mixed in the ratio of 84:16, grinding to specific surface area is 400 ± 20cm2/kg, is made
Cement.
2 raw material chemical constituent (%) of table
| Component | Loss | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | TiO2 | Na2O | SO3 | Li2O | B2O3 | Total |
| Lime stone | 42.02 | 1.96 | 1.26 | 0.41 | 53.54 | 0.31 | - | - | - | - | - | 99.5 |
| Alumina | 11.4 | 10.21 | 65.53 | 6.5 | 1.12 | 0.46 | 1.86 | - | - | - | - | 97.08 |
| Desulfurized gypsum | 8.59 | 4.06 | 1.84 | 0.67 | 34.14 | 3.34 | - | 0.18 | 46.3 | - | - | 99.12 |
| Lithium carbonate | 59.9 | - | - | - | - | - | - | - | - | 40.1 | - | 100 |
| Borax | 44.78 | - | - | - | - | - | - | 15.41 | - | - | 34.82 | 95.01 |
Embodiment 3
A kind of preparation method of sulphate aluminium cement, comprising the following steps:
(1) using lime stone, alumina, the natural gypsum, lithium slag, boron slag etc. as main raw material(s), the concrete component of each raw material
3 are shown in Table, raw material is ground together in the ratio of 54 parts of lime stone, 24 parts of alumina, 11 parts of the natural gypsum, 6 parts of lithium slag, 1 part of boron slag
At raw meal powder, the control of raw material fineness is tailed at 80 μm as 16-18%；
(2) production of super hardening sulphate aluminium cement is carried out on industry water stall, the preheated device preheating of raw meal powder is laggard
Entering in kiln, the control of clinkering zone temperature of charge keeps the temperature 0.5 hour at 1300-1350 DEG C in kiln, using coal dust as fuel, coal ash (at
Dividing the 3) amount of bringing into that is shown in Table is 4%；
(3) clinker and anhydrite being fired to mix in the ratio of 85:15, grinding to specific surface area is 400 ± 20cm2/kg,
Cement is made.
3 raw material chemical constituent (%) of table
| Component | Loss | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | TiO2 | K2O | Na2O | SO3 | Li2O | B2O3 | Total |
| Lime stone | 43.22 | 1.54 | 1.02 | 0.41 | 52.83 | 0.88 | - | - | - | - | - | - | 99.9 |
| Alumina | 14.4 | 10.21 | 66.11 | 5.8 | 0.82 | 0.41 | 2.01 | - | - | - | - | - | 99.76 |
| The natural gypsum | 13.28 | 0.42 | 0.21 | 0.08 | 40.08 | 0.55 | - | 0.11 | - | 44.95 | - | - | 99.68 |
| Lithium slag | 8.25 | 40.5 | 28.01 | 2.56 | 8.88 | 2.23 | 2.04 | 1.21 | 0.88 | 3.2 | 1.78 | - | 99.54 |
| Boron slag | 40.2 | 9.34 | 2.24 | 1.21 | 3.01 | 35.2 | - | - | 3.58 | - | - | 3.72 | 98.5 |
| Coal ash | 0.51 | 50.62 | 43.7 | 0.66 | 1.58 | 0.66 | 0.53 | 0.36 | 0.11 | - | - | - | 98.73 |
Comparative example
With commercially sulphate aluminium cement (it contains 15% anhydrite) for raw material, 0.3% lithium carbonate of incorporation (analysis pure chemistry
Reagent) and 0.1% borax (analysis pure chemistry reagent), cement is made.
According to GB/T20472-2006, the obtained cement sample of embodiment 1-3 and comparative example is determined, is obtained
Its specific surface area, initial condensation time, whole setting time, 2h compression strength, 4h compression strength, 1 day compression strength and resistance to compression in 28 days
Intensity is shown in Table 4.
The physical property of 4 cement of table
It can be seen that from embodiment 1-3 and cement and addition lithium that the embodiment 2 of industrial level lithium carbonate and borax obtains be added
The cement that the embodiment 3 of slag and boron slag obtains, physical property is almost consistent, this explanation is reached using lithium slag and boron slag
Effect with raw material of industry lithium carbonate and borax effect achieved be it is identical, from the angle of environmental protection and waste utilization, completely may be used
To replace industrial chemicals with lithium slag and boron slag.
It can be seen that the object of cement prepared by embodiment 1-3 and cement prepared by comparative example from embodiment 1-3 and comparative example
Rationality can be almost consistent, or even makes moderate progress or improve, and it is effective that this, which illustrates that the embodiment of the present invention takes measures, moreover,
What the embodiment of the present invention was added in the raw material of sulphate aluminium cement is that the substance containing elemental lithium (is also possible to added with containing boron member
The substance of element), it is not intended to limit the source of lithium (or boron), can use waste residue as raw material, it while cost is reduced can be with
Benefit is useless.
Heretofore described numberical range includes numerical value all within the scope of this, and including any two within the scope of this
The value range of numerical value composition.The different numerical value of the same index occurred in all embodiments of the invention can form in any combination
Value range.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, according to
According to technical spirit any simple modification, equivalent change and modification to the above embodiments of the invention, this hair is still fallen within
In the range of bright technical solution.
Claims (10)
1. a kind of preparation method of sulphate aluminium cement characterized by comprising
The raw material for choosing sulphate aluminium cement, wherein the raw material includes that the substance containing elemental lithium obtains the raw material grinding
Raw meal powder obtains clinker then through 1200-1350 DEG C of calcining 30min；
The clinker is mixed with anhydrite, grinding obtains sulphate aluminium cement；
It is calculated in mass percent, the clinker includes:
Anhydrous calcium sulphoaluminate: 30-80%, dicalcium silicate: 10-40%, ferrite mineral: 5-20%, dissociate gypsum: 0-15%,
Perovskite: 0-5%, free calcium oxide: 0-3% and lithia: 0.06-0.8%.
2. the preparation method of sulphate aluminium cement according to claim 1, which is characterized in that
The substance containing elemental lithium is at least one of lithium salts and waste material containing lithium.
3. the preparation method of sulphate aluminium cement according to claim 2, which is characterized in that
The lithium salts is lithium carbonate, lithium sulfate, lithium nitrate or lithium chloride；Or,
The waste material containing lithium is lithium slag or tailing containing lithium.
4. the preparation method of sulphate aluminium cement according to claim 1, which is characterized in that
The raw material further includes the substance containing boron element.
5. the preparation method of sulphate aluminium cement according to claim 4, which is characterized in that
The substance containing boron element is at least one of boric acid, boron cash, borate and boracic waste material.
6. the preparation method of sulphate aluminium cement according to claim 5, which is characterized in that
The borate is sodium tetraborate, line borate or antifungin；Or,
The boracic waste material is boracic waste residue or boracic tailing.
7. the preparation method of the sulphate aluminium cement according to any one of claim 4-6, which is characterized in that the cement
Clinker further include: boron oxide is calculated in mass percent, and content is not more than 0.5%.
8. the preparation method of sulphate aluminium cement according to claim 1, which is characterized in that
The mass ratio of the clinker and the anhydrite is 80-90:10-20.
9. a kind of sulphate aluminium cement, which is characterized in that including clinker and gypsum,
Wherein, the mass ratio of the clinker and the anhydrite is 80-90:10-20；
It is calculated in mass percent, the clinker includes:
Anhydrous calcium sulphoaluminate: 30-80%, dicalcium silicate: 10-40%, ferrite mineral: 5-20%, dissociate gypsum: 0-15%,
Perovskite: 0-5%, free calcium oxide: 0-3%, lithia: 0.06-0.8% and boron oxide: 0-0.5%.
10. sulphate aluminium cement according to claim 9, which is characterized in that
2 hours intensity of the sulphate aluminium cement are 12-17MPa, and 4 hours intensity is 20-28MPa, and 1 day intensity is 35-
40MPa。
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