CN112479609A - All-solid-waste aluminum ferrite cement clinker for prefabricated parts and preparation method thereof - Google Patents

All-solid-waste aluminum ferrite cement clinker for prefabricated parts and preparation method thereof Download PDF

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CN112479609A
CN112479609A CN202011526218.2A CN202011526218A CN112479609A CN 112479609 A CN112479609 A CN 112479609A CN 202011526218 A CN202011526218 A CN 202011526218A CN 112479609 A CN112479609 A CN 112479609A
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slag
raw materials
cement clinker
aluminum
solid waste
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张冠军
赵晨
杨相彪
吕艳芳
路帅兵
李凯
于祥
李洪伟
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Ruzhou Dongjiang Building Industrial Technology Co ltd
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Ruzhou Dongjiang Building Industrial Technology 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
    • C04B7/00—Hydraulic cements
    • C04B7/24—Cements from oil shales, residues or waste other than slag
    • C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
    • 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
    • C04B7/14—Cements containing slag
    • C04B7/147—Metallurgical slag
    • 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
    • C04B7/14—Cements containing slag
    • C04B7/147—Metallurgical slag
    • C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
    • 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
    • C04B7/14—Cements containing slag
    • C04B7/147—Metallurgical slag
    • C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
    • C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing activators
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention relates to a full solid waste aluminum ferrite cement clinker for prefabricated parts and a preparation method thereof, wherein the cement clinker comprises the following raw materials, by mass, 5-20% of an iron solid waste raw material and SO35 to 10 percent of raw materials, 5 to 25 percent of aluminum raw materials and 50 to 60 percent of calcium raw materials. Compared with the prior art, the cement prepared by the method can be used for analyzing the influence of the mineral firing and hydration performance of the cement clinker by cooperatively blending, reasonably matching and optimizing the proportion of various solid wastes according to the component characteristics of the industrial solid wastes and by applying test means such as XRD (X-ray diffraction), lithofacies analysis, SEM (scanning Electron microscope) and the likeFactors, determine the appropriate mineral composition and the optimal calcination process conditions of the cement clinker, and 100 percent of industrial solid waste is utilized to produce the full-solid waste ferrate aluminum salt cement clinker, thereby realizing the maximum utilization of industrial waste residues, reducing the production cost and reducing the waste of natural resources.

Description

All-solid-waste aluminum ferrite cement clinker for prefabricated parts and preparation method thereof
Technical Field
The invention relates to the technical field of production of cement-based blending materials for concrete, in particular to a full-solid waste aluminum ferrite cement clinker for prefabricated parts and a preparation method thereof.
Background
The ferro-aluminate cement clinker is a third series cement clinker following the silicate series cement quantity (first series cement clinker) and the aluminate series cement clinker (second series cement clinker), since the mineral of the ferro-aluminate cement clinker is calcium sulfoaluminate (3CaO 3 Al)2O3·CaSO4) Therefore, the cement has the performances of quick hardening, early strength, high impermeability, high frost resistance and high erosion resistance, so that the two kinds of cement are particularly suitable for winter construction engineering and rush repair and rush construction engineering; the method is popularized in engineering construction of marine bridges, wharfs and the like, and in order to further improve the seawater corrosion resistance and various salt corrosion resistance of the iron aluminate cement, the iron phase mineral content in the iron aluminate cement needs to be improved, and hydration of the iron phase can generate a large amount of iron glue, so that the alkalinity of a hydration liquid of the high iron aluminate cement is higher than that of common cement, so that reinforcing steel bars in a concrete structure are not easy to rust, and the high iron content can improve the scouring resistance of concrete.
The iron aluminate cement clinker has the excellent characteristics of quick hardening, early strength, high impermeability, high erosion resistance and the like, and is very suitable for being used as marine concrete. Although the advantages of use are outstanding, large-scale application is always lacking. This is because the production of the ferro-aluminate cement relies too much on high-value industrial raw materials such as limestone, bauxite, iron raw materials and natural gypsum, which results in a high production cost, and the price of the ferro-aluminate cement is usually 1 time higher than that of the silicate cement. This greatly limits the large-scale deployment of aluminoferrite cements. However, along with the long-term mass exploitation of natural resources, cement production raw materials are increasingly scarce, and various cheap industrial solid wastes are adopted to replace materials such as limestone, bauxite, iron raw materials, natural gypsum and the like to produce the iron aluminate cement clinker, so that the production cost is fundamentally reduced, the low-cost preparation of the cementing material is realized, and the cement clinker becomes a hot spot concerned by researchers. Meanwhile, the industrial solid waste is adopted to prepare the high-iron aluminate cement clinker, so that the emission of carbon dioxide during cement production can be reduced, the resource utilization of the solid waste can be promoted, the synergistic and complementary advantages of various solid wastes are utilized, and the resource utilization way of the solid waste is widened. Opens up a new channel for the reutilization of industrial solid wastes, and has great significance for realizing the coordinated development of energy, resources and environment.
Chinese patent CN108191273A discloses a method for preparing cement clinker of iron aluminate, which also selects limestone, aluminum slag ash, gypsum, iron ore powder and bauxite as raw materials to prepare cement clinker; chinese patent CN101439938A is a processing method for manufacturing quick-hardening ferrous aluminate cement from red mud, which also selects limestone, red mud, iron powder, aluminum ore and gypsum as raw materials to prepare cement clinker; chinese patent CN108178540A discloses an iron sulphoaluminate cement clinker, which also uses limestone, aluminum slag ash, bauxite, iron ore powder, gypsum and chemical raw material NaOH as raw materials to prepare the cement clinker; chinese patent CN 111533473A discloses a method for preparing ferrous aluminate cement clinker by using Bayer process red mud, which also selects Bayer process red mud, desulfurized gypsum, limestone and bauxite as raw materials to prepare cement clinker; chinese patent CN108328950A discloses a method for preparing ferro-aluminate cement by red mud in cooperation with other solid wastes, which selects red mud, iron ore tailings, carbide slag and desulfurized gypsum industrial waste residues as raw materials to prepare cement clinker, but the variety of the adopted solid wastes is limited, and the utilization range of the solid wastes is small; the methods for calcining the iron aluminate cement clinker all use at least one natural mineral or all use limited industrial waste residues, the partial substitution of natural raw materials ensures that the utilization of the industrial waste residues has a certain limit, the utilization rate of the industrial solid waste reaches 70-90 percent at present, and the 100 percent utilization rate of the industrial solid waste cannot be completely realized.
The key problem to be solved is how to invent the all-solid-waste ferrate-aluminate cement clinker for the prefabricated part and the preparation method thereof, which can reduce the emission of carbon dioxide during cement production, promote the resource utilization of solid wastes, utilize various solid wastes to prepare the all-solid-waste ferrate-aluminate cement clinker cooperatively, can exert the complementary advantages of different types of raw material components, widen the resource utilization way of the solid wastes and give consideration to social benefits.
Disclosure of Invention
In order to solve the problems of the existing method for calcining the aluminum ferrite salt cement clinker, the partial substitution of natural raw materials causes the utilization of industrial waste residues to have a certain limit, the utilization rate of the existing industrial solid waste reaches 70-90 percent, and the aluminum ferrite salt cement clinker can not be produced by completely realizing the utilization rate of 100 percent of the industrial solid waste; the invention provides a full-solid waste aluminum ferrite cement clinker for prefabricated parts and a preparation method thereof, which can reduce the emission of carbon dioxide during cement production and promote the resource utilization of solid wastes.
The technical scheme of the invention is as follows: the total solid waste aluminum ferrite salt cement clinker for prefabricated parts comprises the following raw materials, by mass, 5-20% of an iron solid waste raw material and SO-containing raw materials35 to 10 percent of raw materials, 5 to 25 percent of aluminum raw materials and 50 to 60 percent of calcium raw materials.
The iron solid waste raw material comprises copper slag, ferroalloy slag and lead-zinc slagAll Fe contained in steel slag, sulfuric acid slag, metal tailings and the like2O3At least one of solid wastes, wherein the iron solid waste raw material comprises Fe in copper slag, lead-zinc slag, steel slag, sulfuric acid slag, gold tailings and the like2O3The mass fraction of the component (A) is more than or equal to 20.0 percent.
Said SO-containing3The raw materials comprise SO-containing ash, desulfurized gypsum, phosphogypsum, citric acid residue, lactic acid residue, titanium white residue, fluorgypsum and the like3At least one of solid wastes, SO in the solid sulfur ash, the desulfurized gypsum, the phosphogypsum, the citric acid residue, the lactic acid residue, the titanium white residue, the fluorgypsum and the like3The mass fraction of the solid waste is more than or equal to 35.0 percent.
The aluminum raw materials comprise all Al-containing industrial waste residues, titanium extraction tailings, aluminum sulfate residues, aluminum refractory material wastes and the like in an aluminum section plant2O3At least one of solid wastes, the aluminum slag of the aluminum section plant, the titanium extraction tailings, the aluminum sulfate slag and the aluminum refractory material wastes2O3The mass fraction of the component (a) is more than or equal to 20.0 percent.
The calcareous raw material comprises at least one of solid wastes containing CaO, such as marble tailings, lime slag, dicyandiamide slag, carbide slag and the like, wherein the mass fraction of CaO in the marble tailings, the lime slag, the dicyandiamide slag, the carbide slag and the like is more than or equal to 45.0%.
A preparation method of the total-solid waste aluminum ferrite cement clinker for prefabricated parts comprises the following steps:
firstly, a calcium raw material, an iron raw material, an aluminum raw material and SO3After the raw materials are measured according to the proportion, the raw materials are ground to be below 80 mu m by an experimental ball mill, and the raw materials are put into a special forming die to be pressed into a cylindrical test block after being uniformly mixed;
step two, during calcination, firstly placing the mixture in a drying box which is kept at the constant temperature of 105 +/-5 ℃ for drying for 1 hour, then placing the mixture in a high-temperature furnace which is kept at the constant temperature of 900-1000 ℃ for presintering for 30 minutes, then quickly moving the mixture into the high-temperature furnace which is kept at the constant temperature of 1220-1300 ℃ for calcination for 30 minutes, and quickly cooling to obtain the full-solid waste high belite sulphoaluminate cement clinker for UHPC, wherein the mineral composition of the clinker is C4A3S:35%～55%，C2S:15%～35%，C4AF:15%～30。
The invention has the following beneficial effects:
1) the method further expands the variety of industrial wastes on the basis of conventional solid wastes, is successfully used for producing the high-iron aluminous cement clinker by reasonably matching the raw materials, has the sintering temperature of 1230-1250 ℃, and can reduce the sintering temperature by more than 200 ℃ when being used for calcining the high-belite cement clinker taking belite as a leading mineral compared with the general portland cement, obviously reduce the coal consumption for sintering and reduce CO2、SO2And NOx emission, the requirements of low energy consumption and low emission are met, the application of 100% industrial waste is realized, the problem of recycling a large amount of industrial waste residues is solved, and the negative influence on the environment and industrial development is avoided;
2) according to the formula, the consumption of natural minerals such as limestone, bauxite, gypsum and the like is not adopted, so that the waste of natural resources is avoided, and the comprehensive cost of cement clinker production can be greatly reduced;
3) the high-iron ferrite aluminate cement clinker produced by the invention has the strength of more than 50.0Mpa and more than 70.0Mpa in 3d and 28d, has the excellent characteristics of low hydration heat, high fluidity, high durability, high later strength, freezing resistance, permeability resistance, erosion resistance, low water consumption of standard consistency, long setting time, small linear expansion rate and mortar dry shrinkage and the like, is widely applied to the marine concrete construction engineering and the like, has good building construction performance, and opens up a new preparation method for the production and the manufacture of the high-iron ferrite aluminate cement clinker.
Reference numerals
FIG. 1 is an XRD spectrum of clinker calcined at 1250 ℃ for 30 min;
FIG. 2 SEM-EDS analysis of cement clinker prepared by calcination at 1250 ℃ for 30 min.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Examples
The total solid waste aluminum ferrite cement clinker for prefabricated parts comprises the following components in percentage by massRaw material, iron solid waste 5% -20%, containing SO35 to 10 percent of raw materials, 5 to 25 percent of aluminum raw materials and 50 to 60 percent of calcium raw materials.
The above is the basic implementation mode of the invention, and further improvement, perfection and limitation can be made on the basis of the above: for example, the iron solid waste raw materials comprise copper slag, ferroalloy slag, lead-zinc slag, steel slag, sulfate slag, metal tailings and the like all containing Fe2O3At least one of solid wastes, wherein the iron solid waste raw material comprises Fe in copper slag, lead-zinc slag, steel slag, sulfuric acid slag, gold tailings and the like2O3The mass fraction of the component (A) is more than or equal to 20.0 percent.
The above is the basic implementation mode of the invention, and further improvement, perfection and limitation can be made on the basis of the above: as described containing SO3The raw materials comprise SO-containing ash, desulfurized gypsum, phosphogypsum, citric acid residue, lactic acid residue, titanium white residue, fluorgypsum and the like3At least one of solid wastes, SO in the solid sulfur ash, the desulfurized gypsum, the phosphogypsum, the citric acid residue, the lactic acid residue, the titanium white residue, the fluorgypsum and the like3The mass fraction of the solid waste is more than or equal to 35.0 percent.
The above is the basic implementation mode of the invention, and further improvement, perfection and limitation can be made on the basis of the above: for example, the aluminum raw materials comprise all Al-containing waste residues such as industrial waste residues of aluminum profile factories, titanium extraction tailings, aluminum sulfate residues and aluminum refractory material wastes2O3At least one of solid wastes, the aluminum slag of the aluminum section plant, the titanium extraction tailings, the aluminum sulfate slag and the aluminum refractory material wastes2O3The mass fraction of the component (a) is more than or equal to 20.0 percent.
The above is the basic implementation mode of the invention, and further improvement, perfection and limitation can be made on the basis of the above: for example, the calcareous raw material comprises at least one of solid wastes containing CaO, such as marble tailings, lime slag, dicyandiamide slag and carbide slag, and the mass fraction of CaO in the marble tailings, the lime slag, the dicyandiamide slag and the carbide slag is more than or equal to 45.0%.
A preparation method of the total-solid waste aluminum ferrite cement clinker for prefabricated parts comprises the following steps:
firstly, a calcium raw material, an iron raw material, an aluminum raw material and SO3After the raw materials are measured according to the proportion, the raw materials are ground to be below 80 mu m by an experimental ball mill, and the raw materials are put into a special forming die to be pressed into a cylindrical test block after being uniformly mixed;
step two, during calcination, firstly placing the mixture in a drying box which is kept at the constant temperature of 105 +/-5 ℃ for drying for 1 hour, then placing the mixture in a high-temperature furnace which is kept at the constant temperature of 900-1000 ℃ for presintering for 30 minutes, then quickly moving the mixture into the high-temperature furnace which is kept at the constant temperature of 1220-1300 ℃ for calcination for 30 minutes, and quickly cooling to obtain the full-solid waste high belite sulphoaluminate cement clinker for UHPC, wherein the mineral composition of the clinker is C4A3S:35%～55%，C2S:15%～35%，C4AF:15%～30。
In the invention, more types of industrial solid waste raw materials are applied, and in order to make the purposes, technical schemes and advantages of the invention more clear, the industrial solid waste is selected from one of the four raw materials and is subjected to burdening and calcination in the example, so that the invention is further described in detail. It is to be understood that the specific examples of the use of the materials described herein are merely illustrative of the invention and are not intended to limit all other materials used in the invention.
In order to ensure the formation of 4 minerals in the clinker, a proportioning calculation method needs to be designed, the proportioning of the raw materials is calculated according to the designed mineral composition of the clinker and the chemical components of the raw materials, and the following steps can be taken:
in the production of high belite sulphoaluminate cement clinker, the alkalinity coefficient (C) is introducedm) The concept of three values of Al-Si ratio (n) and Al-S ratio (P) which are mainly used for adjusting the raw material proportion and controlling the clinker components.
1) Coefficient of basicity (C)m）：
Cm=
Figure DEST_PATH_IMAGE001
2) Aluminum-silicon ratio (n):
Figure 830898DEST_PATH_IMAGE002
=
Figure DEST_PATH_IMAGE003
3) sulfur to aluminum ratio (P):
Figure 607093DEST_PATH_IMAGE004
=
Figure DEST_PATH_IMAGE005
the mineral composition of the clinker is designed.
ω（C2S）=2.87ω（SiO2）
ω（C4A3
Figure 573781DEST_PATH_IMAGE006
）=3.04ω（Fe2O3）
ω（C4A3
Figure 703411DEST_PATH_IMAGE006
）=0.99[ω（Al2O3）-0.64ω（Fe2O3）]
The chemical composition of the clinker is calculated from the mineral composition according to the following formula:
ω（CaO）=0.6512ω（C2S）+0.3672ω（C4A3
Figure 986625DEST_PATH_IMAGE006
）+0.4616ω（C4AF）
ω（SiO2）=0.3488ω（C2S）
ω（Al2O3）=0.5016ω（C4A3
Figure 277929DEST_PATH_IMAGE006
）+0.2098ω（C4AF）
ω（Fe2O3）=0.33ω（C4AF）
ω（SO3）=0.1311ω（C4A3
Figure 263072DEST_PATH_IMAGE006
）
and establishing a relational expression according to the principle that the chemical components of the clinker are equal to the sum of the corresponding chemical components of the raw materials in each proportion, and calculating the proportion of each raw material by solving to obtain the proportion of the raw materials.
The raw material ratio obtained by calculation can be used for calculating the raw material ratio, and determining whether the analysis value meets the design requirement, if not, the raw material ratio can be properly adjusted on the basis until the design requirement is met. Under the general condition, if the selection of raw materials meets the design of the composition of a plurality of groups of minerals, the raw material proportion can be accurately calculated according to the calculation steps; if the raw material selection does not fully satisfy the design requirements, further steps may be taken to make the adjustments.
The mineral composition of the clinker is as follows: c4A3
Figure 930813DEST_PATH_IMAGE006
:20%～30%， C2S:50%～55%，C4AF:12%～30%，
The clinker comprises the following oxides in percentage by mass:
Ca0:48.0%～53.0%、SiO2:15.0%～18.0%、Fe2O3:2.0%～3.0%、Al2O3:19.0%～25.0%、S O3:6.0%～8.5%。
the raw materials used for preparing the high belite sulphoaluminate cement clinker comprise calcium raw materials, silicon raw materials, aluminum raw materials, iron raw materials and SO-containing raw materials3Raw material components.
One industrial solid waste is selected from four raw materials, and the mixture is calcined in the example; the iron solid waste raw material selects lead-zinc slag, and Fe in the lead-zinc slag2O3The mass fraction of the active carbon is more than or equal to 20.0 percent; the aluminum raw material is industrial waste residue of an aluminum section bar factory, and Al in the industrial waste residue of the aluminum section bar factory2O3The mass fraction of the active carbon is more than or equal to 20.0 percent; calcium raw materials are calcium carbide slag, and the mass fraction of CaO in the calcium carbide slag is more than or equal to 45.0%; containing SO3The raw materials are desulfurized gypsum and SO3The mass fraction is more than or equal to 35.0 percent.
TABLE 1 chemical composition of four industrial residues
Figure 68534DEST_PATH_IMAGE008
The present invention will be described in further detail with reference to specific examples below:
examples 1-4 various industrial residues and their chemical compositions are shown in table 1:
examples 1-4 examples industrial residue ratios are shown in table 2:
Figure DEST_PATH_IMAGE009
examples 1-example 4 clinker preparation method:
drying four kinds of industrial waste residues in the table 1 in a drying box at 100 ℃, respectively weighing according to the proportioning requirements of the industrial waste residues in each example in the table 2, weighing 3Kg of mixed materials after weighing, uniformly mixing, grinding in a test ball mill until the screen residue of a square-hole sieve with the particle size of 80 mu m is less than or equal to 10.0 percent, and then putting in a special forming die to press into a cylindrical test block; during calcination, the mixture is firstly placed in a drying box which is kept at the constant temperature of (105 +/-5) DEG C for drying for 1h, then is put in a high-temperature furnace which is kept at the constant temperature of 950 ℃ for presintering for 30min, then is quickly moved into the high-temperature furnace which is kept at the constant temperature of 1250 ℃ for calcination for 30min, and then is taken out and is quenched in the air to the room temperature until all material columns are completely calcined. Then crushing the calcined and cooled clinker, and grinding the crushed clinker by using an experimental ball mill until the specific surface area is 375 m and 20 m3And/kg (set according to industrial actual production control indexes).
TABLE 3 chemical analysis of Cement Clinker
Figure DEST_PATH_IMAGE011
TABLE 4 mineral content of Cement Clinker
Figure 720619DEST_PATH_IMAGE012
The results of measuring the physical properties of the cement clinker such as strength, consistency, water consumption, setting time, etc. according to the national standard method are shown in Table 5.
TABLE 5 physical Properties of Cement Clinker
Figure DEST_PATH_IMAGE013
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or some technical features can be replaced. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The utility model provides a prefabricated component is with useless ferrate aluminum salt cement clinker entirely admittedly which characterized in that: comprises the following raw materials, by mass, 5-20% of iron solid waste raw material and SO35 to 10 percent of raw materials, 5 to 25 percent of aluminum raw materials and 50 to 60 percent of calcium raw materials.
2. The total solid waste aluminoferrite cement clinker for prefabricated parts according to claim 1, characterized in that: the iron solid waste raw materials comprise copper slag, ferroalloy slag, lead-zinc slag, steel slag, sulfate slag, metal tailings and the like all containing Fe2O3At least one of solid wastes, wherein the iron solid waste raw material comprises Fe in copper slag, lead-zinc slag, steel slag, sulfuric acid slag, gold tailings and the like2O3The mass fraction of the component (A) is more than or equal to 20.0 percent.
3. The total solid waste aluminoferrite cement clinker for prefabricated parts according to claim 1, characterized in that: said SO-containing3The raw materials comprise SO-containing ash, desulfurized gypsum, phosphogypsum, citric acid residue, lactic acid residue, titanium white residue, fluorgypsum and the like3At least one of solid wastes, SO in the solid sulfur ash, the desulfurized gypsum, the phosphogypsum, the citric acid residue, the lactic acid residue, the titanium white residue, the fluorgypsum and the like3The mass fraction of the solid waste is more than or equal to 35.0 percent.
4. The total solid waste aluminoferrite cement clinker for prefabricated parts according to claim 1, characterized in that: the aluminum raw materials comprise all Al-containing industrial waste residues, titanium extraction tailings, aluminum sulfate residues, aluminum refractory material wastes and the like in an aluminum section plant2O3At least one of solid wastes, the aluminum slag of the aluminum section plant, the titanium extraction tailings, the aluminum sulfate slag and the aluminum refractory material wastes2O3The mass fraction of the component (a) is more than or equal to 20.0 percent.
5. The total solid waste aluminoferrite cement clinker for prefabricated parts according to claim 1, characterized in that: the calcareous raw material comprises at least one of solid wastes containing CaO, such as marble tailings, lime slag, dicyandiamide slag, carbide slag and the like, wherein the mass fraction of CaO in the marble tailings, the lime slag, the dicyandiamide slag, the carbide slag and the like is more than or equal to 45.0%.
6. The method for preparing the cement clinker of any one of claims 1 to 5, which is used as a prefabricated member and comprises the following steps:
firstly, a calcium raw material, an iron raw material, an aluminum raw material and SO3After the raw materials are measured according to the proportion, the raw materials are ground to be below 80 mu m by an experimental ball mill, and the raw materials are put into a special forming die to be pressed into a cylindrical test block after being uniformly mixed;
step two, during calcination, the mixture is firstly placed in a drying box which is kept at the constant temperature of 105 +/-5 ℃ for drying for 1 hour, and then the mixture is placed in a drying box which is kept at the constant temperature of 900-1000 DEG CPresintering in a high-temperature furnace for 30min, quickly transferring into the high-temperature furnace which is kept at the constant temperature of 1220-1300 ℃ for calcining for 30min, quickly cooling, and then preparing the full-solid waste high belite sulphoaluminate cement clinker for UHPC, wherein the mineral composition of the clinker is C4A3S:35%～55%，C2S:15%～35%，C4AF:15%～30%。
CN202011526218.2A 2020-12-22 2020-12-22 All-solid-waste aluminum ferrite cement clinker for prefabricated parts and preparation method thereof Pending CN112479609A (en)

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