CN110204239A - A kind of lithium slag admixture and its preparation method and application - Google Patents
A kind of lithium slag admixture and its preparation method and application Download PDFInfo
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- CN110204239A CN110204239A CN201910290261.4A CN201910290261A CN110204239A CN 110204239 A CN110204239 A CN 110204239A CN 201910290261 A CN201910290261 A CN 201910290261A CN 110204239 A CN110204239 A CN 110204239A
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention provides a kind of lithium slag admixture and its preparation method and application, by mass percentage, the raw material of the lithium slag admixture forms are as follows: alumino-silicate type lithium ground-slag: 60%-80%, sulfate type lithium ground-slag: 19.5%-39.9%, promotor: 0.1%-0.5%.Lithium slag admixture of the invention is using alumino-silicate type lithium ground-slag and sulfate type lithium ground-slag as primary raw material, using grinding process, improve its fineness, promote the dissolution of silicon, aluminium, sulfate ion in lithium ground-slag, and then it may advantageously facilitate and generate more Friedel salt (FS, 3CaOAl in cement-based material2O3·CaCl2·10H2) and C-S-H gel O, thus accelerate its ability to cure to chloride ion, and increasing for C-S-H gel content, be conducive to the consistency for improving hardening cement base material, to be further reduced in matrix harmful free chloride ion to structural damage, and improve the mechanical property of cement-based material.
Description
Technical field
The present invention relates to admixture technology field, in particular to a kind of lithium slag admixture and its preparation method and application.
Background technique
Ocean is a complexity, severe spontaneous corrosion environment.As continually developing for marine resources passes through with coastal area
The fast development of Ji, a large amount of ocean structure engineerings are built up and come into operation, and construction speed and scale increase year by year.These are being built
It is reinforced concrete structure mostly with built emphasis ocean engineering, is not subjected to the erosion of rough seas all the time,
The especially erosion of chloride ion can cause serious corrosion, so that service life is substantially reduced to reinforcing bar.It is invaded every year by chloride ion
Reinforced concrete structure durability problem caused by erosion has brought tremendous economic losses to society.Therefore, how freedom is reduced
The content of chloride ion in reinforced concrete structures, this generates vital influence to reinforced concrete structure durability.
Corrosion inhibitor is mainly added in traditional method to corrosion resistance of chloride ion, prevents destruction of the chloride ion to reinforcing bar, and
The addition of corrosion inhibitor, on the one hand, structure can be had adverse effect on, on the other hand, will increase cost；To corrosion resistance of chloride ion
Another main method be optimization pore structure, this certainly will will cause the raising of cement usage amount or other additives are added, and increase
Add use cost.
Spodumene is added concentrated sulfuric acid roasting, is sufficiently reacted, the acidification material after acidification after 1200 DEG C of high-temperature calcinations,
Clear water wash water is added, and with solo flight powder (CaCO3) residual acid is neutralized, slurry is obtained, slurry leaching obtains leachate progress
It handles in next step, remaining is leached mud lithium slag.Lithium ground-slag is very thin, and outlet is stacked serious to surrounding enviroment dust pollution and accounted for
With a large amount of soils.
Therefore, the corrosion resistance of chloride ion that a kind of lithium ground-slag product is used for armored concrete is developed, there is highly important meaning
Justice.
Summary of the invention
In view of this, the present invention is directed to propose a kind of lithium slag admixture, to solve, existing lithium slag resource utilization rate is low, steel
Reinforced concrete corrosion resistance of chloride ion problem at high cost.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of lithium slag admixture, by mass percentage, the raw material of the lithium slag admixture form are as follows: alumino-silicate type lithium
Ground-slag: 60%-80%, sulfate type lithium ground-slag: 19.5%-39.9%, promotor: 0.1%-0.5%.
Optionally, the partial size of the alumino-silicate type lithium ground-slag is less than 75 μm；The partial size of the sulfate type lithium ground-slag is small
In 75 μm.
Optionally, by mass percentage, the promotor includes 60%-70% triisopropanolamine and 30%-40% tri-
Ethanol amine.
Optionally, in the alumino-silicate type lithium ground-slag content of the content less than 10%, MgO of sulfur trioxide less than 1%,
The total content of silica and aluminium oxide is greater than 70%.
Optionally, the content of sulfur trioxide is 30%-40% in the sulfate type lithium ground-slag, and the content of chloride ion is less than
The content of 1%, MgO are less than 1%.
The second object of the present invention is to provide a kind of method for preparing above-mentioned lithium slag admixture, the preparation method include with
Lower step:
By the alumino-silicate type lithium ground-slag, the sulfate type lithium ground-slag, the promotor mix after, grinding to get
Lithium slag admixture.
Optionally, the milling time of the grinding is 3-5min.
The third object of the present invention is to provide a kind of above-mentioned lithium slag admixture in the solidification of cement-based material chloride ion
Using in this application, the cement-based material includes cement；The lithium slag admixture equivalent replaces 15~45% water
Mud.
Compared with the existing technology, lithium slag admixture of the present invention has the advantage that
1, lithium slag admixture of the invention is used using alumino-silicate type lithium ground-slag and sulfate type lithium ground-slag as primary raw material
Grinding process improves its fineness, promotes the dissolution of silicon, aluminium, sulfate ion in lithium ground-slag, and then may advantageously facilitate cement base
More Friedel salt (FS, 3CaOAl are generated in material2O3·CaCl2·10H2O) and C-S-H gel, to accelerate it
To the ability to cure of chloride ion, and increasing for C-S-H gel content, be conducive to the consistency for improving hardening cement base material, thus
Harmful free chloride ion is further reduced in matrix to structural damage, and improves the mechanical property of cement-based material, using this
The lithium slag admixture of invention can make the chloride ion curing degree of cement-based material improve 75% or more, and the 28d of cement-based material is strong
11-22MPa can be improved in degree, and 10-20MPa can be improved in 60d intensity.
2, the present invention provides a kind of new direction for the resource utilization of lithium slag, and lithium slag admixture of the invention can equivalent substitution
Cement 15~45%, substantially increases the resource utilization rate of lithium slag, and improves the added value of lithium residue product, and the present invention
After replacing cement using barium slag admixture, the dosage of cementitious material can be reduced, and then advantageously reduce the production of cement-based material
Cost.
3, the present invention prepares lithium slag admixture using common grinding process, and preparation process is simple, and preparation process is easy to control, and
And promotor is added in the present invention in grinding process, on the one hand, it can further improve mill efficiency, and then reduce preparation energy consumption,
On the other hand, the dissolution of silicon, aluminium, sulfate ion in lithium slag can further be promoted, to further increase it to chloride ion
Ability to cure.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
Below in conjunction with embodiment, the present invention will be described in detail.
Embodiment 1
A kind of lithium slag admixture, by mass percentage, the raw material of the lithium slag admixture form are as follows: alumino-silicate type lithium slag
Powder: 60%, sulfate type lithium ground-slag: 39.9%, promotor: 0.1%.
Wherein, by mass percentage, promotor mixing by 60% triisopropanolamine and 40% triethanolamine；Aluminium
The content that the content of sulfur trioxide is 8.2%, MgO in silicate-type lithium ground-slag is 0.2%, and the content of silica is 52.2%,
The content of aluminium oxide is 20.6%；The content of sulfur trioxide is 37.4% in sulfate type lithium ground-slag, and the content of chloride ion is
The content of 0.6%, MgO are 0.4%.
The lithium slag admixture of the present embodiment is prepared using following methods:
Alumino-silicate type lithium ground-slag, sulfuric acid of the partial size less than 75 μm according to above-mentioned raw materials formula, by partial size less than 75 μm
After salt form lithium ground-slag, promotor mixing, it is placed in ball mill and grinds 5min, in process of lapping, drum's speed of rotation 480r/min,
Up to lithium slag admixture.
Embodiment 2
A kind of lithium slag admixture, by mass percentage, the raw material of the lithium slag admixture form are as follows: alumino-silicate type lithium slag
Powder: 65%, sulfate type lithium ground-slag: 34.8%, promotor: 0.2%.
Wherein, by mass percentage, promotor mixing by 63% triisopropanolamine and 37% triethanolamine；Aluminium
The content that the content of sulfur trioxide is 8.2%, MgO in silicate-type lithium ground-slag is 0.2%, and the content of silica is 52.2%,
The content of aluminium oxide is 20.6%；The content of sulfur trioxide is 37.4% in sulfate type lithium ground-slag, and the content of chloride ion is
The content of 0.6%, MgO are 0.4%.
The lithium slag admixture of the present embodiment is prepared using following methods:
Alumino-silicate type lithium ground-slag, sulfuric acid of the partial size less than 75 μm according to above-mentioned raw materials formula, by partial size less than 75 μm
After salt form lithium ground-slag, promotor mixing, it is placed in ball mill and grinds 5min, in process of lapping, drum's speed of rotation 480r/min,
Up to lithium slag admixture.
Embodiment 3
A kind of lithium slag admixture, by mass percentage, the raw material of the lithium slag admixture form are as follows: alumino-silicate type lithium slag
Powder: 70%, sulfate type lithium ground-slag: 29.7%, promotor: 0.3%.
Wherein, by mass percentage, promotor mixing by 65% triisopropanolamine and 35% triethanolamine；Aluminium
The content that the content of sulfur trioxide is 8.2%, MgO in silicate-type lithium ground-slag is 0.2%, and the content of silica is 52.2%,
The content of aluminium oxide is 20.6%；The content of sulfur trioxide is 37.4% in sulfate type lithium ground-slag, and the content of chloride ion is
The content of 0.6%, MgO are 0.4%.
The lithium slag admixture of the present embodiment is prepared using following methods:
Alumino-silicate type lithium ground-slag, sulfuric acid of the partial size less than 75 μm according to above-mentioned raw materials formula, by partial size less than 75 μm
After salt form lithium ground-slag, promotor mixing, it is placed in ball mill and grinds 5min, in process of lapping, drum's speed of rotation 480r/min,
Up to lithium slag admixture.
Embodiment 4
A kind of lithium slag admixture, by mass percentage, the raw material of the lithium slag admixture form are as follows: alumino-silicate type lithium slag
Powder: 75%, sulfate type lithium ground-slag: 24.6%, promotor: 0.4%.
Wherein, by mass percentage, promotor mixing by 68% triisopropanolamine and 32% triethanolamine；Aluminium
The content that the content of sulfur trioxide is 8.2%, MgO in silicate-type lithium ground-slag is 0.2%, and the content of silica is 52.2%,
The content of aluminium oxide is 20.6%；The content of sulfur trioxide is 37.4% in sulfate type lithium ground-slag, and the content of chloride ion is
The content of 0.6%, MgO are 0.4%.
The lithium slag admixture of the present embodiment is prepared using following methods:
Alumino-silicate type lithium ground-slag, sulfuric acid of the partial size less than 75 μm according to above-mentioned raw materials formula, by partial size less than 75 μm
After salt form lithium ground-slag, promotor mixing, it is placed in ball mill and grinds 5min, in process of lapping, drum's speed of rotation 480r/min,
Up to lithium slag admixture.
Embodiment 5
A kind of lithium slag admixture, by mass percentage, the raw material of the lithium slag admixture form are as follows: alumino-silicate type lithium slag
Powder: 80%, sulfate type lithium ground-slag: 19.5%, promotor: 0.5%.
Wherein, by mass percentage, promotor mixing by 70% triisopropanolamine and 30% triethanolamine；Aluminium
The content that the content of sulfur trioxide is 8.2%, MgO in silicate-type lithium ground-slag is 0.2%, and the content of silica is 52.2%,
The content of aluminium oxide is 20.6%；The content of sulfur trioxide is 37.4% in sulfate type lithium ground-slag, and the content of chloride ion is
The content of 0.6%, MgO are 0.4%.
The lithium slag admixture of the present embodiment is prepared using following methods:
Alumino-silicate type lithium ground-slag, sulfuric acid of the partial size less than 75 μm according to above-mentioned raw materials formula, by partial size less than 75 μm
After salt form lithium ground-slag, promotor mixing, it is placed in ball mill and grinds 5min, in process of lapping, drum's speed of rotation 480r/min,
Up to lithium slag admixture.
The lithium slag admixture of 1~embodiment of embodiment 5 is used for the solidification of cement-based material chloride ion, in this application, water
Cement-based material includes cement；Lithium slag admixture equivalent replaces 15~45% cement, i.e., mixes 15~45% in lithium slag admixture.It is real
The volume for applying the lithium slag admixture of 1~embodiment of example 5 is specifically as shown in table 1.
It is solid that chloride ion is carried out to the cement-based material (cement paste) of the lithium slag admixture mixed with 1~embodiment of embodiment 5
The test of rate, pore structure and mechanical property, and it is compared with the cement-based material for not mixing lithium slag admixture of the present invention
(comparative example).Test result is as shown in table 1.
As shown in Table 1, when the lithium slag admixture equivalent of 1~embodiment of embodiment 5 replaces 15~45% cement, cement is net
The chloride ion curing degree of slurry is significantly higher than comparative example, and chloride ion curing degree can be improved 75% or more, and mixed with embodiment 1~reality
The mechanical property for applying the cement paste of 5 lithium slag admixture of example is also significantly greater than comparative example, and 11-22MPa can be improved in 28d intensity,
10-20MPa can be improved in 60d intensity.
Table 1
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of lithium slag admixture, which is characterized in that by mass percentage, the raw material of the lithium slag admixture forms are as follows: aluminium
Silicate-type lithium ground-slag: 60%-80%, sulfate type lithium ground-slag: 19.5%-39.9%, promotor: 0.1%-0.5%.
2. lithium slag admixture according to claim 1, which is characterized in that the partial size of the alumino-silicate type lithium ground-slag is less than
75μm；The partial size of the sulfate type lithium ground-slag is less than 75 μm.
3. lithium slag admixture according to claim 1, which is characterized in that by mass percentage, the promotor includes
60%-70% triisopropanolamine and 30%-40% triethanolamine.
4. lithium slag admixture according to claim 1, which is characterized in that sulfur trioxide in the alumino-silicate type lithium ground-slag
Content of the content less than 10%, MgO less than 1%, the total content of silica and aluminium oxide is greater than 70%.
5. lithium slag admixture according to claim 1, which is characterized in that sulfur trioxide in the sulfate type lithium ground-slag
Content is 30%-40%, and content of the content less than 1%, MgO of chloride ion is less than 1%.
6. the method for preparing lithium slag admixture described in any one of claim 1 to 5, which comprises the following steps:
After the alumino-silicate type lithium ground-slag, the sulfate type lithium ground-slag, the promotor are mixed, grind to get lithium slag
Admixture.
7. the preparation method of lithium slag admixture according to claim 6, which is characterized in that the milling time of the grinding is
3-5min。
8. application of the lithium slag admixture described in any one of claim 1 to 5 in cement-based material chloride ion solidifies, feature
It is, the cement-based material includes cement；The lithium slag admixture equivalent replaces 15~45% cement.
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| CN112500012A (en) * | 2020-11-12 | 2021-03-16 | 宁波大学 | Rust inhibitor for improving rust resistance of steel bar in concrete or mortar and application thereof |
| CN116969704A (en) * | 2023-07-18 | 2023-10-31 | 山东高速建设管理集团有限公司 | High chlorine erosion resistance admixture suitable for cement-based material and preparation method and application thereof |
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