CN114031341B - Method for preparing baking-free steaming-free cured brick by cooperating lepidolite ore dressing squeezed fine mud and lithium slag based on carbon curing - Google Patents
Method for preparing baking-free steaming-free cured brick by cooperating lepidolite ore dressing squeezed fine mud and lithium slag based on carbon curing Download PDFInfo
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- 239000002893 slag Substances 0.000 title claims abstract description 50
- 239000011449 brick Substances 0.000 title claims abstract description 48
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 40
- 229910052629 lepidolite Inorganic materials 0.000 title claims abstract description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000006227 byproduct Substances 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 29
- 238000003756 stirring Methods 0.000 claims description 25
- 238000011068 loading method Methods 0.000 claims description 16
- 239000012190 activator Substances 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 8
- 239000010881 fly ash Substances 0.000 claims description 8
- 235000019353 potassium silicate Nutrition 0.000 claims description 8
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 8
- 230000002195 synergetic effect Effects 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims 2
- 239000011707 mineral Substances 0.000 claims 2
- 238000000926 separation method Methods 0.000 claims 2
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 229910021487 silica fume Inorganic materials 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 238000006253 efflorescence Methods 0.000 abstract description 4
- 206010037844 rash Diseases 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 239000002910 solid waste Substances 0.000 abstract description 4
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 abstract description 3
- 229910052808 lithium carbonate Inorganic materials 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000003513 alkali Substances 0.000 abstract description 2
- 239000004566 building material Substances 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000009270 solid waste treatment Methods 0.000 abstract description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract 1
- 238000000748 compression moulding Methods 0.000 abstract 1
- 238000004090 dissolution Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 abstract 1
- 230000005284 excitation Effects 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 229910052717 sulfur Inorganic materials 0.000 abstract 1
- 239000011593 sulfur Substances 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 239000011469 building brick Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0481—Other specific industrial waste materials not provided for elsewhere in C04B18/00
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
-
- 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
- C04B40/02—Selection of the hardening environment
- C04B40/0231—Carbon dioxide hardening
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2023—Resistance against alkali-aggregate reaction
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
The invention discloses a method for preparing a baking-free steaming-free cured brick by cooperation of lepidolite ore dressing pressed fine mud and lithium slag based on carbon curing, which belongs to the technical field of solid waste treatment and resource utilization and comprises the following components in parts by weight: 50-90 parts of lithium slag, 0-50 parts of squeezed fine mud, 10-25 parts of curing agent and 10-14 parts of water. The invention utilizes the byproduct lithium slag and the squeezed fine mud of lithium carbonate prepared from lepidolite as main raw materials, can accelerate the dissolution of alkali and sulfur in the lithium slag by optimizing the particle composition of the raw materials and exciting the curing agent, further promotes the excitation effect, and can obtain the lithium carbonate with the volume weight of 2730kg/m through compression molding and carbon maintenance 3 The high-strength baking-free and steaming-free cured brick. The invention has wide application range, mature preparation technology and no need of curing the formed brick, improves the production efficiency of brick making, avoids the problems of easy efflorescence and the like on the surface of the cured brick, reduces the production cost, realizes the resource utilization of the lepidolite byproduct slag, reduces the problems of solid waste pollution and land occupation, and meets the environmental protection and application requirements of the market on building materials.
Description
Technical Field
The invention belongs to the technical field of solid waste treatment and resource utilization, and particularly relates to a method for preparing a baking-free steaming-free cured brick by cooperation of lepidolite ore dressing pressed fine mud and lithium slag based on carbon curing.
Background
The squeezed fine mud and the lithium slag which are byproducts in the lithium carbonate preparation from the lepidolite have the characteristics of large quantity, wide occupied area, high pollution, high alkalinity, high sulfate radical, high development difficulty and the like, and the massive stockpiling can seriously harm the life and property safety of people, destroy the ecological environment and limit the local economic development, so the development of resource recycling of the lepidolite byproduct slag has important significance.
With the deep promotion of the urbanization process and the further development of ecological civilized construction, the market puts forward higher requirements on the development of building materials, and the traditional clay building brick does not meet the market requirements any more due to the energy consumption and environmental problems, so that related scholars put forward the preparation of the building brick by pressing and molding the building garbage or tailings, but cannot be popularized and applied further due to the problems of insufficient mechanical strength, easy surface efflorescence and the like.
Disclosure of Invention
In order to solve the problems, the invention adopts the following technical scheme:
a baking-free and steaming-free cured brick prepared by cooperation of lepidolite ore dressing pressed fine mud and lithium slag based on carbon curing comprises the following components in parts by weight: 50-90 parts of lithium slag, 0-50 parts of squeezed fine mud, 10-25 parts of curing agent and 10-14 parts of water.
Furthermore, the proportion of particles with the particle size of the lepidolite byproduct lithium slag below 100 meshes is over 90 percent.
Further, the specific surface area of the pressed fine mud is 500-700m 2 /kg。
Furthermore, the mixing amount ratio of the lepidolite byproduct lithium slag to the pressed fine mud is 7: 3 to 2: 1.
Further, the curing agent is divided into powder and an excitant, the powder is one or more of cement and fly ash, and the excitant is one or more of water glass, sodium sulfate, gypsum and quick lime.
Further, activator and active Na in lithium slag 2 The total content of O is 1-4% of the solid waste raw material.
A method for preparing a baking-free steaming-free cured brick by cooperation of lepidolite ore dressing pressed fine mud and lithium slag based on carbon curing comprises the following steps:
s10, pre-stirring the dry materials with the designed proportion for 2-3min, adding water, stirring for 0.5-1min, doping the excitant and stirring for 1-3 min; the purpose is to ensure that the raw materials are uniformly mixed and fully reacted, and avoid the problem of agglomeration possibly occurring in the stirring process;
s20, weighing a proper amount of materials according to the designed volume weight, filling the materials into a die, loading the materials to 50-70MPa by a press at a loading speed of 2kN/S, and unloading and demoulding after the materials are loaded for 30-60S; aims to control the discreteness of relevant performances of the baking-free and steaming-free bricks and reduce internal pores;
s30, placing the demolded baking-free and steaming-free brick into a curing room with the carbon dioxide concentration of 5-20% and the humidity of 50-70%, curing for 1-3 days, and then moving the brick to an outdoor drying place for piling; the carbon curing can consume the redundant alkali on the surface layer of the baking-free and steaming-free brick, fill the internal pores, contribute to the strength improvement of the baking-free and steaming-free brick and solve the problem of efflorescence.
Has the advantages that:
(1) the baking-free and steaming-free cured brick prepared by the carbon-curing-based lepidolite ore dressing squeezed fine mud and the lithium slag in a synergistic manner can achieve higher strength without steam curing or firing under the combined action of various solid waste material collaborative optimization, curing agent activation, carbon curing and the like, can reduce the production cost, and solves the problem of stockpiling of part of lepidolite ore dressing solid waste.
(2) According to the invention, the early strength of the cured brick in 3 days can be improved by at least 50% by adjusting the grain composition through the synergistic effect of the pressed fine mud and the lithium slag.
(3) The strength of the lepidolite byproduct slag cured baking-free steaming-free cured brick provided by the invention can reach more than 15MPa in 7 days, the strength can be improved by at least 15% after carbon curing, and the problem of surface efflorescence is solved.
Detailed Description
Example 1:
s10, taking 75 parts of lithium slag (with fineness modulus of 1.64), 25 parts of curing agent and 12 parts of water according to parts by weight; the mass ratio of the cement to the fly ash to the exciting agent in the curing agent is 57:28:15 respectively; the activator only uses water glass (because the sulfate radical content of the lithium slag is higher).
S20, stirring the dry materials in a stirrer for 2min, adding water, stirring for 0.5min, adding an exciting agent, and stirring for 2.5min to obtain the brick making materials.
And S30, loading the materials into a 240 x 115 x 53mm mould at a loading speed of 2kN/S to 65MPa, keeping the load for 30S, demoulding, sealing and curing the baking-free and steaming-free brick, and moving the brick to a drying place for piling after three days.
S40, the compressive strengths of the lepidolite by-product slag solidified baking-free steaming-free brick prepared in the embodiment after 3 days, 7 days and 28 days are respectively 21.2MPa, 33.3MPa and 49.4 MPa.
Example 2:
s10, taking 50 parts by weight of lithium slag (fineness modulus of 1.64) and 25 parts by weight of pressed fine powder (specific surface area of 650 m) 2 Per kg), 25 parts of curing agent and 12 parts of water; the mass ratio of the cement to the fly ash to the exciting agent in the curing agent is 57:28:15 respectively; the activator only uses water glass (because the sulfate radical content of the lithium slag is higher).
S20, stirring the dry materials in a stirrer for 2min, adding water, stirring for 0.5min, adding an exciting agent, and stirring for 2.5min to obtain the brick making materials.
And S30, loading the materials into a 240 x 115 x 53mm mould at a loading speed of 2kN/S to 60MPa, keeping the load for 30S, demoulding, sealing and curing the baking-free and steaming-free brick, and moving the brick to a drying place for piling after three days.
S40, the compressive strengths of the lepidolite by-product slag cured baking-free steaming-free brick prepared in the embodiment for 3 days, 7 days and 28 days are 34.1MPa, 40.8MPa and 55.1MPa respectively.
MIP testing was performed on examples 1 and 2 to obtain data relating to internal porosity for the above examples, and the results are shown in table 1.
TABLE 1
The invention can be obtained from the above table, the non-fired and non-steamed curing brick is prepared by the cooperation of the pressed fine mud and the lithium slag, the porosity of the curing brick can be reduced, the void ratio in the particle size range of 10-100nm is reduced, the mechanical strength of the non-fired and non-steamed curing brick is further improved, and the authenticity of the synergistic effect of the pressed fine mud and the lithium slag is proved.
Example 3:
s10, taking 45 parts of lithium slag (fineness modulus of 1.64) and 45 parts of pressed fine powder (specific surface area of 650 m) according to parts by weight 2 Per kg), 10 parts of curing agent and 14 parts of water; the mass ratio of the cement, the fly ash and the exciting agent in the curing agent is 31:10 respectively9, preparing a mixture; the activator only uses water glass (because the sulfate radical content of the lithium slag is higher).
S20, stirring the dry materials in a stirrer for 2min, adding water, stirring for 0.5min, adding an exciting agent, and stirring for 2.5min to obtain the brick making materials.
And S30, loading the materials into a 240 x 115 x 53mm mould at a loading speed of 2kN/S to 60MPa, carrying for 30S, demoulding, and sealing and curing the baking-free and steaming-free brick.
S40, the compressive strengths of the lepidolite by-product slag cured baking-free steaming-free brick prepared in the embodiment are 12.9MPa, 16.3MPa and 23.2MPa respectively after 3 days, 7 days and 28 days.
Example 4:
s10, taking 60 parts by weight of lithium slag (fineness modulus of 1.64) and 30 parts by weight of pressed fine powder (specific surface area of 650 m) 2 Per kg), 10 parts of curing agent and 14 parts of water; the mass ratio of the cement, the fly ash and the exciting agent in the curing agent is 31:10:9 respectively; the activator only uses water glass (because the sulfate radical content of the lithium slag is higher).
S20, stirring the dry materials in a stirrer for 2min, adding water, stirring for 0.5min, adding an exciting agent, and stirring for 2.5min to obtain the brick making materials.
And S30, loading the materials into a 240 x 115 x 53mm mould at a loading speed of 2kN/S to 60MPa, carrying for 30S, demoulding, and sealing and curing the baking-free and steaming-free brick.
S40, the compressive strengths of the lepidolite by-product slag cured baking-free steaming-free brick prepared in the embodiment after 3 days, 7 days and 28 days are respectively 16.2MPa, 19.6MPa and 28.7 MPa.
Example 5:
s10, taking 60 parts by weight of lithium slag (fineness modulus of 1.64) and 30 parts by weight of pressed fine powder (specific surface area of 650 m) 2 Per kg), 10 parts of curing agent and 14 parts of water; the mass ratio of the cement, the fly ash and the exciting agent in the curing agent is 31:10:9 respectively; the activator only uses water glass (because the sulfate radical content of the lithium slag is higher).
S20, stirring the dry materials in a stirrer for 2min, adding water, stirring for 0.5min, adding an exciting agent, and stirring for 2.5min to obtain the brick making materials.
And S30, loading the materials into a 240 × 115 × 53mm mould at a loading speed of 2kN/S to 60MPa, holding for 30S, demoulding, and curing the baking-free and steaming-free brick with carbon dioxide concentration of 10% and humidity of 60% for three days, and then transferring to a drying place for piling.
S40, the compressive strengths of the lepidolite by-product slag cured baking-free steaming-free brick prepared in the embodiment are 20.7MPa, 28.8MPa and 36.8MPa respectively after 3 days, 7 days and 28 days.
Example 6:
s10, taking 60 parts by weight of lithium slag (fineness modulus of 1.64) and 30 parts by weight of pressed fine powder (specific surface area of 650 m) 2 Per kg), 10 parts of curing agent and 14 parts of water; the mass ratio of the cement, the fly ash and the exciting agent in the curing agent is 31:10:9 respectively; the activator only uses water glass (because the sulfate radical content of the lithium slag is higher).
S20, stirring the dry materials in a stirrer for 2min, adding water, stirring for 0.5min, adding an exciting agent, and stirring for 2.5min to obtain the brick making materials.
And S30, loading the materials into a 240 x 115 x 53mm mould at a loading speed of 2kN/S to 60MPa, carrying for 30S, demolding, carrying out carbon curing on the baking-free and steaming-free brick, wherein the carbon dioxide concentration is 20% and the humidity is 60%, curing for three days, and then transferring to a drying place for piling.
S40, the detection shows that the compressive strengths of the lepidolite by-product slag cured baking-free steaming-free brick prepared in the embodiment are 24.6MPa, 26.4MPa and 37.4MPa respectively in 3 days, 7 days and 28 days.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (5)
1. A baking-free and steaming-free cured brick prepared by cooperation of lepidolite ore dressing pressed fine mud and lithium slag based on carbon curing is characterized by comprising the following components in parts by weight: 50-90 parts of lithium slag, 0-50 parts of squeezed fine mud, 10-25 parts of curing agent and 10-14 parts of water; the mixing amount ratio of the lepidolite byproduct lithium slag to the pressed fine mud is 7: 3-2: 1, the curing agent is divided into powder and an activator, the powder is one or more of cement, fly ash, silica fume and steel slag, and the activator is water glass.
2. The carbon-curing-based lepidolite mineral separation pressed fine mud and lithium slag synergistic preparation baking-free steaming-free cured brick as claimed in claim 1, wherein the particle proportion of the lepidolite byproduct lithium slag particle size below 100 meshes is more than 90%.
3. The carbon curing-based lepidolite mineral separation pressed fine mud and lithium slag synergetic preparation baking-free steaming-free cured brick as claimed in claim 1, wherein the specific surface area of the pressed fine mud is 500-700m 2 /kg。
4. The carbon curing-based lepidolite beneficiation pressed fine mud and lithium slag synergetic prepared baking-free non-autoclaved curing brick according to claim 1, wherein the activator and active Na in the lithium slag 2 The total content of O is 1-4% of the total content of the lithium slag and the pressed fine mud.
5. The method for preparing the carbon curing-based lepidolite beneficiation pressed fine mud and lithium slag synergistic baking-free steaming-free cured brick is characterized by comprising the following steps of:
s10, pre-stirring the dry materials with the designed proportion for 2-3min, adding water, stirring for 0.5-1min, doping the excitant and stirring for 1-3 min;
s20, weighing a proper amount of materials according to the designed volume weight, filling the materials into a die, loading the materials to 50-70MPa by a press at a loading speed of 2kN/S, and unloading and demoulding after the materials are loaded for 30-60S;
s30, placing the demolded baking-free steaming-free brick into a curing room with the carbon dioxide concentration of 15-20% and the humidity of 50-70% for curing for 1-3 days, and then moving the brick to an outdoor drying place for piling.
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| CN202111561220.8A CN114031341B (en) | 2021-12-20 | 2021-12-20 | Method for preparing baking-free steaming-free cured brick by cooperating lepidolite ore dressing squeezed fine mud and lithium slag based on carbon curing |
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| CN116535153B (en) * | 2023-01-06 | 2024-07-16 | 武汉三源特种建材有限责任公司 | Lepidolite slag road water-stable mixture and preparation method thereof |
| CN116730708B (en) * | 2023-07-05 | 2024-09-10 | 江西省建材科研设计院有限公司 | Lithium slag microcrystalline floor tile and preparation method thereof |
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