CN110877970B - Acidic lithium slag-Portland cement-silica fume composite cementing material and preparation method thereof - Google Patents

Acidic lithium slag-Portland cement-silica fume composite cementing material and preparation method thereof Download PDF

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CN110877970B
CN110877970B CN201911193074.0A CN201911193074A CN110877970B CN 110877970 B CN110877970 B CN 110877970B CN 201911193074 A CN201911193074 A CN 201911193074A CN 110877970 B CN110877970 B CN 110877970B
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lithium slag
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张建军
何祥华
张舜洋
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Hunan Lvsheng Technology Development Co ltd
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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
    • 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
    • C04B28/04—Portland 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
    • C04B18/02—Agglomerated materials, e.g. artificial aggregates
    • C04B18/027—Lightweight materials
    • 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
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
    • 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
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
    • 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
    • C04B2111/40—Porous or lightweight materials
    • 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
    • C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
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Abstract

The invention discloses an acid lithium slag-portland cement-silica fume composite cementing material, which comprises the following components: portland cement, acid lithium slag, silica fume, a graphene material, iron tailings and a light filler; the invention also discloses a preparation method of the compound, which comprises the following steps: taking 15-25 parts by weight of fly ash, sludge, oyster shell powder, clay, water and easily-meltable foaming particles, uniformly mixing, granulating and firing to obtain the light filler. Mixing silicate cement and silica fume, and grinding to obtain a first grinding product; respectively grinding the acid lithium slag, the graphene material and the iron tailings. Grinding and mixing the first ground product, the acidic lithium slag powder, the graphene powder and the iron tailings to obtain a second ground product; and uniformly mixing the second ground product and the light filler to obtain a finished product of the cementing material. Compared with the prior art, the invention does not use foaming agent, and uses light filler to control the density of the material, so as to achieve the purpose of accurately controlling the density of the material, thereby improving the quality of the finished product.

Description

Acidic lithium slag-Portland cement-silica fume composite cementing material and preparation method thereof
Technical Field
The invention relates to a cementing material, in particular to an acid lithium slag-Portland cement-silica fume composite cementing material and a preparation method thereof.
Background
Cement (cement) is a powdery hydraulic inorganic cementing material, which is added with water and stirred to form a slurry, can be hardened in the air or better in the water, and can firmly bond materials such as sand, stone and the like together. The history of cement dates back to the gulf of Qin' an land 5000 years ago, where they paved a modern cement-like floor. The ancient roman later used a mixture of lime and pozzolan in construction, which was very similar to modern lime pozzolan cements. The concrete made of the cemented macadam not only has higher strength after being hardened, but also can resist the erosion of fresh water or salt water. For a long time, cement is used as an important cementing material and widely applied to engineering of civil construction, water conservancy, national defense and the like.
In the development process of cement, in order to meet the requirements of modern construction engineering and new construction technology, the variety of cement is continuously increased, and thousands of special cements and special cements have been developed in China. Portland-series universal cements (i.e., Portland cement) hold an important position in Chinese concrete construction from the viewpoint of yield and use.
The general portland cement is a hydraulic cementing material prepared from portland cement clinker, a proper amount of gypsum and a mixed material. The general portland cement is a portland series cement used in most industrial and civil building engineering, and accounts for about 98% of the total cement yield. The general portland cement is divided into portland cement PI, ordinary portland cement PO, slag portland cement PS, pozzolanic portland cement PP, fly ash portland cement PF and composite portland cement PC according to the variety and the mixing amount of the mixed materials. The six kinds of cement are mainly characterized by that the silicate cement clinker is used as main component, the gypsum is used as setting regulator, and the difference between different kinds is mainly the difference of the kinds and quantity of the mixed materials. The six kinds of cement have basically identical common property, and simultaneously, due to the characteristics of mixed materials, different kinds of cement have larger difference in performance. At present, the product structure of Chinese cement is mainly common portland cement, slag portland cement and portland cement, and the yield of the three types of cement accounts for 92-95% of the yield of the Chinese cement.
Light cement also appears in the prior art, and the foaming agent is utilized to generate pores in the cement so as to reduce the density of the cement and improve the physical properties of the cement, but the foam of the foaming agent is reduced, so that the cement is seriously collapsed in the solidification process, and the density of the cement cannot be ensured. In view of the above, the inventors of the present invention have conducted extensive studies to obtain an acidic lithium slag-portland cement-silica fume composite material and a preparation method thereof.
Disclosure of Invention
The invention aims to provide an acid lithium slag-portland cement-silica fume composite cementing material and a preparation method thereof, which can effectively ensure the density of concrete.
The technical purpose of the invention is realized by the following technical scheme:
the acid lithium slag-portland cement-silica fume composite cementing material comprises: 30-50 parts of Portland cement, 2-5 parts of acid lithium slag, 3-7 parts of silica fume, 0.5-1 part of graphene material, 35-55 parts of iron tailings and 10-20 parts of light filler, wherein the light filler is in a porous structure.
In a further improvement, the lightweight filler is in the form of particles.
In a further improvement, the light filler has a cavity inside the particle, and the volume of the cavity is 0.1cm 3 -0.25cm 3 。
In a further improvement, the light filler is ceramsite, and the particle size of the ceramsite is 0.5-1 cm.
The invention also provides a preparation method of the acid lithium slag-silicate cement-silica fume composite gelled material, which is used for the acid lithium slag-silicate cement-silica fume composite gelled material and comprises the following steps:
the method comprises the following steps: taking 12-35 parts by weight of fly ash, 15-25 parts by weight of sludge, 2-10 parts by weight of oyster shell powder, 5-20 parts by weight of clay, 30-50 parts by weight of water and 10-20 parts by weight of fusible foam particles, uniformly mixing, granulating and firing to obtain a light filler;
Step two: mixing silicate cement and silica fume, and grinding to obtain a first grinding product;
step three: respectively grinding the acid lithium slag, the graphene material and the iron tailings to obtain acid lithium slag powder, graphene powder and iron tailings powder;
step four: grinding and mixing the first ground product, the acidic lithium slag powder, the graphene powder and the iron tailings to obtain a second ground product;
step five: and uniformly mixing the second ground product and the light filler to obtain a finished product of the cementing material.
In a further improvement, the first step comprises the following steps:
(1) uniformly mixing 12-35 parts by weight of fly ash, 15-25 parts by weight of sludge, 2-10 parts by weight of oyster shell powder, 5-20 parts by weight of clay and 30-50 parts by weight of water to obtain slurry;
(2) uniformly mixing the slurry and the fusible foam particles to obtain a mixed product;
(3) preheating the mixed product for the first time to perform initial setting to obtain an initial setting product;
(4) crushing the primary setting product into granules to obtain primary filling material;
(5) calcining the primary filler, wherein the calcining process comprises the following steps: firstly preheating for 10-30min under the conditions of 500-700 ℃ and then sintering for 10min under the conditions of 1000-1300 ℃ to obtain the light filler.
In a further improvement, the easily-melted foaming particles are EVA foaming particles or plastic particles.
The improved structure of the mixing device comprises the following steps that (2) and (3) are completed by adopting the mixing device, the mixing device comprises a first hopper, a first material pipe, a second hopper, a second material pipe, a third material pipe, a supporting frame and a storage bin, the lower end of the first hopper is connected with the first material pipe, the lower end of the second hopper is connected with the second material pipe, the first material pipe and the second material pipe extend downwards in an inclined mode and are connected with the third material pipe respectively, the height position of the joint of the first material pipe and the third material pipe is equal to that of the joint of the second material pipe and the third material pipe, and the third material pipe extends downwards vertically and is fixed on the supporting frame.
Further improvement, the feed bin includes outer storehouse and interior storehouse, the bottom in interior storehouse is equipped with a plurality of protruding and evenly distributed's that make progress heat conduction post, is equipped with the couple on the upper limb, by be equipped with in the heat conduction post and upwards extend by its bottom and be equipped with the cavity, outer storehouse includes inner wall and outer wall, form the heating chamber between outer wall and the inner wall, the heating chamber by the bottom in outer storehouse upwards extends and forms the grafting post, the lateral part in outer storehouse is formed with air inlet and gas outlet, air inlet and gas outlet respectively with the heating chamber intercommunication, interior storehouse is arranged in the outer storehouse, the grafting post with the position one-to-one of cavity just inserts in the cavity.
In a further improvement, the mixing device further comprises pulleys and slide rails, wherein at least four pulleys are arranged on two sides of the outer bin, at least two slide rails are arranged in parallel, and the pulleys are arranged on the slide rails.
Compared with the prior art, the acid lithium slag-portland cement-silica fume composite cementing material provided by the invention does not use a foaming agent, the density of the material is controlled by using a light filler, the density of the material can be accurately controlled, the quality of a finished product is improved, and the fracture resistance of the material can be obviously improved by using the graphene material contained in the material; the invention also provides a preparation method of the acid lithium slag-Portland cement-silica fume composite cementing material, which can be used for manufacturing a light filler with good quality by using mixing equipment, so that the density of a finished product material is accurately controlled.
Drawings
FIG. 1 is a schematic structural diagram of a mixing device applied in the preparation method of the acid lithium slag-portland cement-silica fume composite cementitious material according to the invention.
FIG. 2 is a schematic diagram of a partially disassembled structure of a mixing device applied in the method for preparing the acid lithium slag-portland cement-silica fume composite cementitious material according to the present invention.
FIG. 3 is a schematic diagram of the structure of the longitudinal section of the outer bin relating to the preparation method of the acid lithium slag-portland cement-silica fume composite cementing material.
In the drawings
A first hopper-1; a first material pipe-2; a second hopper-3;
a second feed pipe-4; a third material pipe-5; a support frame-6;
a storage bin-7; an outer bin-71; an inner wall-711;
an outer wall-712; a heating chamber-713; a plug-in post-714;
an air inlet-715; an air outlet-716; an inner chamber-72;
a thermally conductive post-721; a hook-722; a pulley-8;
a slide rail-9.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
The acid lithium slag-portland cement-silica fume composite cementing material comprises: 30-50 parts of Portland cement, 2-5 parts of acid lithium slag, 3-7 parts of silica fume, 0.5-1 part of graphene material, 35-55 parts of iron tailings and 10-20 parts of light filler, wherein the light filler is in a porous structure and is in a granular shape, cavities are formed inside the granules of the light filler, and the volume of each cavity is 0.1cm 3 -0.25cm 3 The light filler is ceramsite, and the particle size of the ceramsite is 0.5-1 cm. Because the light filler is of a porous structure, the light filler cannot collapse in the mixing process, and compared with a structure which uses a foaming agent and is adopted in the prior art, the light filler can enable the actual density of the gelled material to meet the requirement of the designed density, and the quality of the gelled material is greatly and effectively improved.
The embodiment also provides a preparation method of the acid lithium slag-portland cement-silica fume composite cementing material, which is used for manufacturing the acid lithium slag-portland cement-silica fume composite cementing material, and the following examples are adopted:
example one
The method comprises the following steps:
the method comprises the following steps: taking 12 parts by weight of fly ash, 15 parts by weight of sludge, 2 parts by weight of oyster shell powder, 5 parts by weight of clay, 30 parts by weight of water and 10 parts by weight of fusible foam particles, uniformly mixing, wherein the parts by weight only represent the weight proportion of each component in the light filler, and firing after granulation to obtain the light filler;
the first step specifically comprises:
(1) uniformly mixing 12 parts of fly ash, 15 parts of sludge, 2 parts of oyster shell powder, 5 parts of clay and 30 parts of water by weight to obtain slurry;
(2) uniformly mixing the slurry and the fusible foam particles to obtain a mixed product;
(3) Preheating the mixed product for the first time to perform initial setting to obtain an initial setting product;
(4) crushing the primary setting product into granules to obtain primary filling material;
(5) calcining the primary filler, wherein the calcining process comprises the following steps: preheating for 10min under the condition of 500 ℃, and then sintering for 10min under the condition of 100 ℃ to obtain the light filler.
Step two: mixing 30 parts by weight of Portland cement and 3 parts by weight of silica fume, and grinding to obtain a first grinding product;
step three: respectively grinding 2 parts by weight of acid lithium slag, 0.5 part by weight of graphene material and 35 parts by weight of iron tailings to obtain acid lithium slag powder, graphene powder and iron tailings powder;
step four: grinding and mixing the first ground product, the acidic lithium slag powder, the graphene powder and the iron tailings to obtain a second ground product;
step five: and uniformly mixing the second ground product and 10 parts by weight of light filler to obtain a finished product A of the cementing material.
The easily-melted foaming particles are EVA foaming particles or plastic particles.
Example two
The method comprises the following steps:
the method comprises the following steps: taking 35 parts by weight of fly ash, 25 parts by weight of sludge, 10 parts by weight of oyster shell powder, 20 parts by weight of clay, 50 parts by weight of water and 20 parts by weight of fusible foam particles, uniformly mixing, wherein the parts by weight only indicate the weight proportion of each component in the light filler, and firing after granulation to obtain the light filler;
The first step specifically comprises the following steps:
(1) uniformly mixing 35 parts by weight of fly ash, 25 parts by weight of sludge, 10 parts by weight of oyster shell powder, 20 parts by weight of clay and 50 parts by weight of water to obtain slurry;
(2) uniformly mixing the slurry and the fusible foam particles to obtain a mixed product;
(3) preheating the mixed product for the first time to perform initial setting to obtain an initial setting product;
(4) crushing the primary setting product into granules to obtain primary filling material;
(5) calcining the primary filler, wherein the calcining process comprises the following steps: preheating for 30min at 700 ℃, and then sintering for 10min at 1300 ℃ to obtain the light filler.
Step two: mixing 50 parts by weight of Portland cement and 7 parts by weight of silica fume, and grinding to obtain a first grinding product;
step three: respectively grinding 5 parts by weight of acid lithium slag, 1 part by weight of graphene material and 55 parts by weight of iron tailings to obtain acid lithium slag powder, graphene powder and iron tailings powder;
step four: grinding and mixing the first ground product, the acidic lithium slag powder, the graphene powder and the iron tailings to obtain a second ground product;
step five: and uniformly mixing the second ground product and 20 parts by weight of light filler to obtain a finished product B of the cementing material.
The easily-melted foaming particles are EVA foaming particles or plastic particles.
EXAMPLE III
The method comprises the following steps:
the method comprises the following steps: taking 20 parts by weight of fly ash, 20 parts by weight of sludge, 8 parts by weight of oyster shell powder, 10 parts by weight of clay, 40 parts by weight of water and 15 parts by weight of fusible foam particles, uniformly mixing, wherein the parts by weight only represent the weight proportion of each component in the light filler, and firing after granulation to obtain the light filler;
the first step specifically comprises the following steps:
(1) uniformly mixing 20 parts by weight of fly ash, 20 parts by weight of sludge, 8 parts by weight of oyster shell powder, 10 parts by weight of clay and 40 parts by weight of water to obtain slurry;
(2) uniformly mixing the slurry and the fusible foam particles to obtain a mixed product;
(3) preheating the mixed product for the first time to perform initial setting to obtain an initial setting product;
(4) crushing the primary setting product into granules to obtain primary filling material;
(5) calcining the primary filler, wherein the calcining process comprises the following steps: preheating for 20min at 600 ℃, and then sintering for 10min at 1100 ℃ to obtain the light filler.
Step two: mixing 40 parts by weight of Portland cement and 5 parts by weight of silica fume, and grinding to obtain a first grinding product;
step three: respectively grinding 3 parts by weight of acid lithium slag, 0.7 part by weight of graphene material and 40 parts by weight of iron tailings to obtain acid lithium slag powder, graphene powder and iron tailings powder;
Step four: grinding and mixing the first ground product, the acidic lithium slag powder, the graphene powder and the iron tailings to obtain a second ground product;
step five: and uniformly mixing the second ground product and 15 parts by weight of light filler to obtain a finished product C of the cementing material.
The easily-melted foaming particles are EVA foaming particles or plastic particles.
Example four
The method comprises the following steps:
the method comprises the following steps: taking 16 parts by weight of fly ash, 18 parts by weight of sludge, 9 parts by weight of oyster shell powder, 18 parts by weight of clay, 45 parts by weight of water and 14 parts by weight of fusible foam particles, uniformly mixing, wherein the parts by weight only represent the weight proportion of each component in the light filler, and firing after granulation to obtain the light filler;
the first step specifically comprises the following steps:
(1) uniformly mixing 16 parts by weight of fly ash, 18 parts by weight of sludge, 9 parts by weight of oyster shell powder, 18 parts by weight of clay and 45 parts by weight of water to obtain slurry;
(2) uniformly mixing the slurry and the fusible foam particles to obtain a mixed product;
(3) preheating the mixed product for the first time to perform initial setting to obtain an initial setting product;
(4) crushing the primary setting product into granules to obtain primary filling material;
(5) calcining the primary filler, wherein the calcining process comprises the following steps: preheating for 25min at 650 ℃, and then sintering for 10min at 1250 ℃ to obtain the lightweight filler.
Step two: mixing 35 parts by weight of Portland cement and 6 parts by weight of silica fume, and grinding to obtain a first grinding product;
step three: respectively grinding 4 parts by weight of acid lithium slag, 0.9 part by weight of graphene material and 50 parts by weight of iron tailings to obtain acid lithium slag powder, graphene powder and iron tailings powder;
step four: grinding and mixing the first ground product, the acidic lithium slag powder, the graphene powder and the iron tailings to obtain a second ground product;
step five: and uniformly mixing the second ground product and 17 parts by weight of light filler to obtain a finished product D of the cementing material.
The easily-melted foaming particles are EVA foaming particles or plastic particles.
EXAMPLE five
The method comprises the following steps:
the method comprises the following steps: taking 14 parts by weight of fly ash, 21 parts by weight of sludge, 4 parts by weight of oyster shell powder, 17 parts by weight of clay, 42 parts by weight of water and 13 parts by weight of fusible foam particles, uniformly mixing, wherein the parts by weight only represent the weight proportion of each component in the light filler, and firing after granulation to obtain the light filler;
the first step specifically comprises the following steps:
(1) uniformly mixing 14 parts by weight of fly ash, 21 parts by weight of sludge, 4 parts by weight of oyster shell powder, 17 parts by weight of clay and 42 parts by weight of water to obtain slurry;
(2) Uniformly mixing the slurry and the fusible foam particles to obtain a mixed product;
(3) preheating the mixed product for the first time to perform initial setting to obtain an initial setting product;
(4) crushing the primary setting product into grains to obtain primary filling material;
(5) calcining the primary filler, wherein the calcining process comprises the following steps: preheating for 15min at 650 ℃, and then sintering for 10min at 1050 ℃ to obtain the light filler.
Step two: mixing 45 parts by weight of Portland cement and 6 parts by weight of silica fume, and grinding to obtain a first grinding product;
step three: respectively grinding 4 parts by weight of acid lithium slag, 0.8 part by weight of graphene material and 50 parts by weight of iron tailings to obtain acid lithium slag powder, graphene powder and iron tailings powder;
step four: grinding and mixing the first ground product, the acidic lithium slag powder, the graphene powder and the iron tailings to obtain a second ground product;
step five: and uniformly mixing the second ground product and 18 parts by weight of light filler to obtain a finished product E of the cementing material.
The easily-melted foaming particles are EVA foaming particles or plastic particles.
EXAMPLE six
The method comprises the following steps:
the method comprises the following steps: taking 32 parts by weight of fly ash, 23 parts by weight of sludge, 3 parts by weight of oyster shell powder, 12 parts by weight of clay, 40 parts by weight of water and 16 parts by weight of fusible foam particles, uniformly mixing, wherein the parts by weight only represent the weight proportion of each component in the light filler, and firing after granulation to obtain the light filler;
The first step specifically comprises the following steps:
(1) uniformly mixing 32 parts of fly ash, 23 parts of sludge, 3 parts of oyster shell powder, 12 parts of clay and 40 parts of water by weight to obtain slurry;
(2) uniformly mixing the slurry and the fusible foam particles to obtain a mixed product;
(3) preheating the mixed product for the first time to perform initial setting to obtain an initial setting product;
(4) crushing the primary setting product into granules to obtain primary filling material;
(5) calcining the primary filler, wherein the calcining process comprises the following steps: preheating for 18min at 650 ℃, and then sintering for 10min at 1220 ℃ to obtain the light filler.
Step two: mixing 42 parts by weight of Portland cement and 6 parts by weight of silica fume, and grinding to obtain a first grinding product;
step three: respectively grinding 4 parts by weight of acid lithium slag, 0.6 part by weight of graphene material and 42 parts by weight of iron tailings to obtain acid lithium slag powder, graphene powder and iron tailings powder;
step four: grinding and mixing the first ground product, the acidic lithium slag powder, the graphene powder and the iron tailings to obtain a second ground product;
step five: and uniformly mixing the second ground product and 18 parts by weight of light filler to obtain a finished product F of the cementing material.
The easily-melted foaming particles are EVA foaming particles or plastic particles.
The density test results for each of the above examples are shown in the following table:
Figure BDA0002294061900000121
Figure BDA0002294061900000131
as can be seen from the above table, the error value between the designed density and the actual density can be controlled within 1% by using the preparation method, and compared with the error value of 2% in the prior art, the density control effect of the preparation method is greatly and effectively improved.
As shown in fig. 1 to 3, in the above embodiment, the steps (2) and (3) are performed by using a mixing device, the mixing device includes a first hopper 1, a first material pipe 2, a second hopper 3, a second material pipe 4, a third material pipe 5, a supporting frame 6 and a storage bin 7, the lower end of the first hopper 1 is connected to the first material pipe 2, the lower end of the second hopper 3 is connected to the second material pipe 4, the first material pipe 2 and the second material pipe 4 extend obliquely and downwardly and are respectively connected to the third material pipe 5, the height position of the connection between the first material pipe 2 and the third material pipe 5 is equal to the height position of the connection between the second material pipe 4 and the third material pipe 5, and the third material pipe 5 extends vertically and downwardly and is fixed to the supporting frame 6.
During operation, the easily-meltable foaming material is fed from the first hopper 1, reaches the third material pipe 5 through the first material pipe 2, the slurry is fed from the second hopper 3, reaches the third material pipe 5 through the second material pipe 4, meets, collides and mixes the easily-meltable foaming material and the slurry at the third material pipe 5, and then falls into the storage bin 7, and by controlling the flow rates of the easily-meltable foaming material and the slurry, the uniform mixing of the easily-meltable foaming material and the slurry can be realized, so that the uniformity of the density of the light filler is effectively ensured.
The storage bin 7 comprises an outer bin 71 and an inner bin 72, wherein the bottom of the inner bin 72 is provided with a plurality of heat conducting columns 721 protruding upwards and uniformly distributed, hooks 722 are arranged on the upper edge of the inner bin, the heat conducting columns 721 are internally provided with cavities extending upwards from the bottoms of the heat conducting columns, the outer bin 71 comprises an inner wall 711 and an outer wall 712, a heating chamber 713 is formed between the outer wall 712 and the inner wall 711, the heating chamber 713 is formed by extending upwards from the bottom of the outer bin 71 to form inserting columns 714, the side part of the outer bin 71 is provided with an air inlet 715 and an air outlet 716, the air inlet 715 and the air outlet 716 are respectively communicated with the heating chamber 713, the inner bin 72 is arranged in the outer bin 71, and the inserting columns 714 correspond to the cavities one to one and are inserted into the cavities.
After the easily meltable foaming material and the slurry enter the stock bin 7, hot air is introduced from the air inlet 715, the heating chamber 713 is heated to 80-90 deg.C, because the inserting column 714 is inserted into the heat-conducting column 721, the heat-conducting column 721 can be heated well, so that the mixture of the fusible foam material and the slurry in the inner chamber 72 can be uniformly heated, under the heating process, the water in the slurry is gradually evaporated and condensed into blocks, after the blocks are formed, the inner bin 72 is extracted by a lifter, the block-shaped objects in the inner bin 72 are put into a crusher to be crushed into granules, and finally the crushed and granulated materials are calcined to form ceramic granules, namely light fillers, in the calcining process, the easily-melted foaming material is melted, and the volume is reduced, so that cavities are formed in the particles, the density of the ceramsite can be effectively reduced, and the finally-formed cementing material has a good light weight characteristic.
The light filler prepared by the scheme has a rough surface due to the adoption of a crushing and granulating mode, and can realize good connection characteristics when being mixed with other materials, so that the structure of the cementing material is more stable.
Further, for the convenience of mixing arrangement's removal, mixing arrangement still includes pulley 8 and slide rail 9, at least four pulley 8 is located outer storehouse 71 both sides, at least two slide rail 9 parallel arrangement, pulley 8 arranges in on the slide rail 9, through setting up pulley 8 and slide rail 9, when throwing the material, can remove feed bin 7 for it is even to throw the material, when taking out the material in feed bin 7, can remove feed bin 7, makes can be convenient for extract interior storehouse 72.
The foregoing description of the embodiments is provided to facilitate an understanding and use of the invention and it will be apparent to those skilled in the art that various modifications to the embodiments and the generic principles defined herein may be applied to other embodiments without the use of inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims (1)

1. The preparation method of the acid lithium slag-silicate cement-silica fume composite cementing material is characterized by comprising the following steps of: 30-50 parts of Portland cement, 2-5 parts of acid lithium slag, 3-7 parts of silica fume, 0.5-1 part of graphene material, 35-55 parts of iron tailings and 10-20 parts of light filler, wherein the light filler is in a porous structure; the light filler is granular; the light filler has a cavity in the particle, and the volume of the cavity is 0.1cm 3 -0.25cm 3 (ii) a The light filler is ceramsite, the particle size of the ceramsite is 0.5-1cm,
the preparation method of the acid lithium slag-Portland cement-silica fume composite gelled material comprises the following steps:
the method comprises the following steps: taking 12-35 parts by weight of fly ash, 15-25 parts by weight of sludge, 2-10 parts by weight of oyster shell powder, 5-20 parts by weight of clay, 30-50 parts by weight of water and 10-20 parts by weight of fusible foam particles, uniformly mixing, granulating and firing to obtain a light filler;
step two: mixing silicate cement and silica fume, and grinding to obtain a first grinding product;
step three: respectively grinding the acid lithium slag, the graphene material and the iron tailings to obtain acid lithium slag powder, graphene powder and iron tailings powder;
Step four: grinding and mixing the first ground product, the acidic lithium slag powder, the graphene powder and the iron tailings to obtain a second ground product;
step five: uniformly mixing the second ground product and the light filler to obtain a finished product of the cementing material;
wherein, the first step comprises the following steps:
(1) uniformly mixing 12-35 parts by weight of fly ash, 15-25 parts by weight of sludge, 2-10 parts by weight of oyster shell powder, 5-20 parts by weight of clay and 30-50 parts by weight of water to obtain slurry;
(2) uniformly mixing the slurry and the fusible foam particles to obtain a mixed product;
(3) preheating the mixed product for the first time to perform initial setting to obtain an initial setting product;
(4) crushing the primary setting product into granules to obtain primary filling material;
(5) calcining the primary filler, wherein the calcining process comprises the following steps: firstly preheating for 10-30min at the temperature of 500-700 ℃, and then sintering for 10min at the temperature of 1000-1300 ℃ to obtain the light filler;
wherein the easily-melted foaming particles are EVA foaming particles or plastic particles;
the steps (2) and (3) are completed by adopting a mixing device, the mixing device comprises a first hopper, a first material pipe, a second hopper, a second material pipe, a third material pipe, a supporting frame and a storage bin, the lower end of the first hopper is connected with the first material pipe, the lower end of the second hopper is connected with the second material pipe, the first material pipe and the second material pipe extend obliquely downwards and are respectively connected with the third material pipe, the height position of the joint of the first material pipe and the third material pipe is equal to that of the joint of the second material pipe and the third material pipe, and the third material pipe extends vertically downwards and is fixed on the supporting frame;
The storage bin comprises an outer bin and an inner bin, wherein the bottom of the inner bin is provided with a plurality of heat conduction columns which are protruded upwards and are uniformly distributed, hooks are arranged on the upper edge of the inner bin, cavities are formed in the heat conduction columns in a mode that the bottoms of the heat conduction columns extend upwards, the outer bin comprises an inner wall and an outer wall, a heating chamber is formed between the outer wall and the inner wall, the heating chamber extends upwards from the bottom of the outer bin to form inserting columns, the side part of the outer bin is provided with an air inlet and an air outlet, the air inlet and the air outlet are respectively communicated with the heating chamber, the inner bin is arranged in the outer bin, and the inserting columns correspond to the cavities one by one and are inserted into the cavities;
the mixing device also comprises pulleys and slide rails, at least four pulleys are arranged on two sides of the outer bin, at least two slide rails are arranged in parallel, and the pulleys are arranged on the slide rails;
when the slurry feeding device works, the easily-melted foaming material is fed from the first hopper, reaches the third material pipe through the first material pipe, the slurry is fed from the second hopper, reaches the third material pipe through the second material pipe, meets, collides and mixes the easily-melted foaming material and the slurry at the third material pipe, and then falls into the storage bin.
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