CN111995347A - Titanium extraction tailing aerated concrete - Google Patents
Titanium extraction tailing aerated concrete Download PDFInfo
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- CN111995347A CN111995347A CN202010930454.4A CN202010930454A CN111995347A CN 111995347 A CN111995347 A CN 111995347A CN 202010930454 A CN202010930454 A CN 202010930454A CN 111995347 A CN111995347 A CN 111995347A
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- titanium
- aerated concrete
- titanium extraction
- cement
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Classifications
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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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
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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
- 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
-
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the technical field of cement products, and particularly relates to titanium extraction tailing aerated concrete. The invention aims to solve the technical problem of providing aerated concrete taking titanium extraction tailings as a raw material, wherein the raw material comprises the following components in parts by mass: 150-210 parts of cement, 400-610 parts of titanium extraction tailings, 15-25 parts of quick lime, 10-20 parts of desulfurized gypsum, 200-350 parts of water and 0.9-1.2 parts of aluminum powder paste. According to the invention, the industrial solid waste titanium extraction tailings are used as the raw material of the aerated concrete, and the performance indexes of the obtained aerated concrete, such as density grade, strength grade, dry shrinkage and the like, meet the standard requirements.
Description
Technical Field
The invention belongs to the technical field of cement products, and particularly relates to titanium extraction tailing aerated concrete.
Background
The aerated concrete block can be used for building non-bearing inner partition walls, has the characteristics of light weight, environmental protection, heat preservation, heat insulation and sound insulation, and is a green and environment-friendly building material product. The aerated concrete system is cement-fly ash-aluminum powder, and the aerated concrete system needs to be autoclaved and cured after being formed.
After the steel-climbing high titanium type blast furnace slag is used for extracting titanium, 85 percent of the total amount of the blast furnace slag becomes new titanium extraction tailings. The titanium extraction tailings are high in chloride ion content and low in fineness, so that the titanium extraction tailings are no longer suitable for concrete gravel materials. Although titanium extraction tailings can be used as the general industrial solid wastes of the II type for stockpiling, the newly added slag yard occupies a large area, increases the industrial investment and the operating cost, and influences the environment. The economic comprehensive utilization technology of the titanium extraction tailings is developed, large-scale utilization is realized, and the influence of stacking of the titanium extraction tailings on the environment is reduced, so that the economic comprehensive utilization technology becomes one of the main factors influencing the promotion of the industrialization of the titanium extraction of the blast furnace slag.
Disclosure of Invention
In order to solve and effectively utilize the problem of extracting titanium tailings from industrial solid wastes, the invention provides the titanium-extracting tailings aerated concrete by using the titanium-extracting tailings as raw materials.
The titanium tailings aerated concrete provided by the invention comprises the following raw materials in parts by mass: 150-210 parts of cement, 400-610 parts of titanium extraction tailings, 15-25 parts of quick lime, 10-20 parts of desulfurized gypsum, 200-350 parts of water and 0.9-1.2 parts of aluminum powder paste. The titanium extraction tailings adopted by the invention are dechlorinated titanium extraction tailings. And the dechlorination adopts water washing dechlorination. The titanium extraction tailings aerated concrete obtained by the component is B06, B07 or B08 grade. Grade division of B06, B07 and B08 refers to GB11968-2006 autoclaved aerated concrete block).
Further, in the titanium extraction tailing aerated concrete, the raw materials comprise the following components in parts by mass: 150-160 parts of cement, 440-450 parts of titanium extraction tailings, 16-18 parts of quick lime, 10-12 parts of desulfurized gypsum, 260-270 parts of water and 0.9-1.0 part of aluminum powder paste. The titanium extraction tailing aerated concrete obtained by the component is B06 grade. The grades of B06, B07 and B08 are classified into reference specification GB11968-2006 autoclaved aerated concrete block.
Further, in the titanium extraction tailing aerated concrete, the raw materials comprise the following components in parts by mass: 170-175 parts of cement, 490-500 parts of titanium extraction tailings, 19-21 parts of quick lime, 12-14 parts of desulfurized gypsum, 290-300 parts of water and 1.1-1.2 parts of aluminum powder paste. The titanium extraction tailing aerated concrete obtained by the component is B07 grade. The grades of B06, B07 and B08 are classified into reference specification GB11968-2006 autoclaved aerated concrete block.
Further, in the titanium extraction tailing aerated concrete, the raw materials comprise the following components in parts by mass: 200-210 parts of cement, 600-610 parts of titanium extraction tailings, 22-24 parts of quick lime, 14-16 parts of desulfurized gypsum, 340-350 parts of water and 1.1-1.2 parts of aluminum powder paste. The titanium extraction tailing aerated concrete obtained by the component is B08 grade. The grades of B06, B07 and B08 are classified into reference specification GB11968-2006 autoclaved aerated concrete block.
In the titanium extraction tailings aerated concrete, the titanium extraction tailings mainly comprise 25-27% of CaO and SiO224～26％、Al2O313-15%, and a small amount of MgO and TiO2. The titanium extraction tailings are byproducts of titanium extraction from the steel-climbing group blast furnace slag.
Further, in the titanium extraction tailings aerated concrete, the specific surface area of the titanium extraction tailings is 300-400 m2A bulk density of 1400 to 1500kg/m3The apparent density is 2900 to 3000kg/m3。
In the titanium extraction tailing aerated concrete, the desulfurized gypsum is granular, the grain size is less than 1mm, and the water content is less than 40%.
In the titanium extraction tailings aerated concrete, the quicklime is granular, the particle size is smaller than 1mm, and the content of effective calcium is larger than 65%.
In the titanium extraction tailing aerated concrete, the cement is 42.5R of ordinary portland cement.
In the titanium extraction tailing aerated concrete, the active aluminum in the aluminum powder paste is more than or equal to 85 percent, and the screen allowance of a 0.075mm square-hole screen is less than or equal to 0.3 percent.
Wherein in the titanium extraction tailings aerated concrete, the density of the titanium extraction tailings aerated concrete is 625-825 kg/m3And the compressive strength is 3.5-10 MPa.
The invention also provides a preparation method of the titanium extraction tailings aerated concrete. The preparation method comprises the following steps: wet ball milling and premixing titanium extraction tailings and desulfurized gypsum until the specific surface area is 300-400 m2Kg, then adding quicklime, cement, aluminum powder paste and the rest water to mixAnd (3) pouring the slurry into a mold, introducing steam to control the temperature of a curing room to be 50-60 ℃ and curing (normal pressure) until foaming is completed, cutting and removing corners to form a semi-finished product, curing the semi-finished product at the normal pressure and the temperature of 100 +/-5 ℃ for 8-10 hours, and naturally curing for 7-14 days. The water adopted by the wet ball milling is from the raw material water, and the rest part of water is added during the subsequent pulping.
According to the invention, the titanium extraction tailings of dechlorinated industrial solid waste are used as raw materials to prepare the aerated concrete, and the dosage of each component is adjusted, so that the mechanical property of the titanium extraction tailings aerated concrete is enhanced, the durability is improved, the general aerated concrete steam pressure maintenance process is omitted, and a large amount of energy consumption can be saved. The titanium tailing aerated concrete provided by the invention has the characteristics of excellent mechanical property, good durability and low energy consumption, and the performance indexes such as density grade, strength grade and dry shrinkage rate meet the standard requirements, so that the titanium tailing aerated concrete can be widely applied to actual production.
Detailed Description
The specific surface area of the titanium extraction tailings after being ground is 300-400 m2The activity of the material is more than 95 percent, but the density of the aerated concrete is not reduced due to the larger specific gravity. The inventor adjusts the proportion of the use amount of each raw material through a large amount of creative labor, adjusts and accurately controls the water consumption, and finely grinds and pre-mixes the raw materials by wet grinding, so that the titanium extraction tailing aerated concrete with good mechanical property and durability and free of autoclave curing is obtained, and 70% of titanium extraction tailing is utilized.
The titanium tailings aerated concrete provided by the invention comprises the following raw materials in parts by mass: 150-210 parts of cement, 400-610 parts of titanium extraction tailings, 15-25 parts of quick lime, 10-20 parts of desulfurized gypsum, 200-350 parts of water and 0.9-1.2 parts of aluminum powder paste.
In the invention, the titanium extraction tailings are industrial solid wastes formed by high-temperature carbonization-low-temperature chlorination of high-titanium blast furnace slag of steel climbing group, and the specific surface area is 300-400 m after grinding2A bulk density of 1400 to 1500kg/m3An apparent density of 2900 to 3000kg/m3。
In the invention, the cement is ordinary Portland cement 42.5R.
In the invention, the quicklime is granular, the grain size is less than 1mm, and the effective calcium content is more than 65%.
In the invention, the desulfurized gypsum is granular, the grain diameter is less than 1mm, and the water content is less than 40%.
In the invention, the fineness of the aluminum paste is 0.075mm, the screen allowance of a square-hole screen is less than or equal to 0.3%, wherein the active aluminum is more than or equal to 85%.
The invention also provides three kinds of more specific titanium extraction tailing aerated concrete.
B06-grade titanium extraction tailing aerated concrete: the raw materials comprise the following components in parts by mass: 150-160 parts of cement, 440-450 parts of titanium extraction tailings, 16-18 parts of quick lime, 10-12 parts of desulfurized gypsum, 260-270 parts of water and 0.9-1.0 part of aluminum powder paste.
B07-grade titanium extraction tailing aerated concrete: the raw materials comprise the following components in parts by mass: 170-175 parts of cement, 490-500 parts of titanium extraction tailings, 19-21 parts of quick lime, 12-14 parts of desulfurized gypsum, 290-300 parts of water and 1.1-1.2 parts of aluminum powder paste.
B08-grade titanium extraction tailing aerated concrete: the raw materials comprise the following components in parts by mass: 200-210 parts of cement, 600-610 parts of titanium extraction tailings, 22-24 parts of quick lime, 14-16 parts of desulfurized gypsum, 340-350 parts of water and 1.1-1.2 parts of aluminum powder paste.
According to the invention, the titanium extraction tailings aerated concrete has excellent mechanical properties and durability by adjusting the content of each component, and the density of the titanium extraction tailings aerated concrete is 625-825 kg/m3And the compressive strength is 3.5-10 MPa. Refer to the national standard GB11968-2006 autoclaved aerated concrete Block.
The invention also provides a preparation method of the titanium extraction tailings aerated concrete. The preparation method comprises the following steps: wet ball milling and premixing titanium extraction tailings and desulfurized gypsum until the specific surface area is 300-400 m2Adding quicklime, cement, aluminum powder paste and residual water, mixing and pulping, pouring the pulp into a mold, introducing steam to control the temperature of a curing room to be 50-60 ℃, curing until foaming is finished, cutting and removing corners to form a semi-finished product, and placing the semi-finished product in the moldCuring for 8-10 h at the temperature of 100 +/-5 ℃ under normal pressure, and then naturally curing for 7-14 days. The water adopted by the wet ball milling is from the raw material water, and the rest part of water is added during the subsequent pulping. Preferably, the wet grinding water-material ratio is 1: 3, and the mass ratio of water to the sum of the titanium extraction tailings and the desulfurized gypsum is.
The present invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
The embodiment of the invention uses the following main raw materials: cement: ordinary portland cement 42.5R; titanium extraction tailings: the specific surface area is 300-400 m2A bulk density of 1400 to 1500kg/m3An apparent density of 2900 to 3000kg/m3(ii) a Quick lime: granular, the grain diameter is less than 1mm, and the effective calcium content is more than 65 percent; desulfurized gypsum: granular, the grain diameter is less than 1mm, and the water content is less than 40%; aluminum powder paste: the active aluminum is more than or equal to 85 percent, and the screen allowance of a square-hole screen with 0.075mm is less than or equal to 0.3 percent.
Examples
The invention provides three groups of titanium tailings aerated concrete of examples and three groups of general aerated concrete of comparative examples, wherein the specific proportions are shown in the following tables 1 and 2:
table 1 shows the component proportion of the titanium tailings aerated concrete
TABLE 2 general aerated concrete component ratios
The titanium extraction tailing aerated concrete and the general aerated concrete test refer to national standard GB11968-2006 autoclaved aerated concrete block, and the test results are shown in tables 3 and 4:
TABLE 3 Performance testing of titanium tailings aerated concrete
Table 4 general aerated concrete performance test
From the data, compared with the common aerated concrete, the titanium tailings aerated concrete has the following advantages: on the premise of keeping better mechanical property and durability, 70 percent (not considering water) of industrial solid waste titanium extraction tailings are used at most, and steam pressure maintenance is not needed.
Claims (10)
1. Titanium extraction tailings aerated concrete is characterized in that: the raw materials comprise the following components in parts by mass: 150-210 parts of cement, 400-610 parts of titanium extraction tailings, 15-25 parts of quick lime, 10-20 parts of desulfurized gypsum, 200-350 parts of water and 0.9-1.2 parts of aluminum powder paste.
2. The titanium-extracting tailing aerated concrete according to claim 1, characterized in that: the raw materials comprise the following components in parts by mass: 150-160 parts of cement, 440-450 parts of titanium extraction tailings, 16-18 parts of quick lime, 10-12 parts of desulfurized gypsum, 260-270 parts of water and 0.9-1.0 part of aluminum powder paste.
3. The titanium-extracting tailing aerated concrete according to claim 1, characterized in that: the raw materials comprise the following components in parts by mass: 170-175 parts of cement, 490-500 parts of titanium extraction tailings, 19-21 parts of quick lime, 12-14 parts of desulfurized gypsum, 290-300 parts of water and 1.1-1.2 parts of aluminum powder paste.
4. The titanium-extracting tailing aerated concrete according to claim 1, characterized in that: the raw materials comprise the following components in parts by mass: 200-210 parts of cement, 600-610 parts of titanium extraction tailings, 22-24 parts of quick lime, 14-16 parts of desulfurized gypsum, 340-350 parts of water and 1.1-1.2 parts of aluminum powder paste.
5. The titanium-extraction tailing aerated concrete according to any one of claims 1 to 4, characterized in that: the titanium extraction tailings mainly comprise 25-27% of CaO and SiO2 24～26％、Al2O313-15%; further, the specific surface area of the titanium extraction tailings is 300-400 m2A bulk density of 1400 to 1500kg/m3The apparent density is 2900 to 3000kg/m3。
6. The titanium-extraction tailing aerated concrete according to any one of claims 1 to 5, characterized in that: the desulfurized gypsum is granular, the grain size is less than 1mm, and the water content is less than 40%; the quicklime is granular, the particle size is less than 1mm, and the content of effective calcium is more than 65%.
7. The titanium-extraction tailing aerated concrete according to any one of claims 1 to 6, characterized in that: the cement is ordinary Portland cement 42.5R.
8. The titanium-extraction tailing aerated concrete according to any one of claims 1 to 7, characterized in that: the active aluminum in the aluminum powder paste is more than or equal to 85 percent, and the screen allowance of a 0.075mm square-hole screen is less than or equal to 0.3 percent.
9. The titanium-extraction tailing aerated concrete according to any one of claims 1 to 8, characterized in that: the density of the titanium extraction tailings aerated concrete is 625-825 kg/m3And the compressive strength is 3.5-10 MPa.
10. The preparation method of the titanium extraction tailing aerated concrete is characterized by comprising the following steps of: the method comprises the following steps: wet ball milling and premixing titanium extraction tailings and desulfurized gypsum until the specific surface area is 300-400 m2Adding quicklime, cement, aluminum powder paste and residual water, mixing to prepare slurry, pouring the slurry into a mold, and introducing steam to control curingCuring at the room temperature of 50-60 ℃ until foaming is finished, then cutting and chamfering to form a semi-finished product, curing the semi-finished product at the temperature of 100 +/-5 ℃ for 8-10 h under normal pressure, and naturally curing for 7-14 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010930454.4A CN111995347A (en) | 2020-09-07 | 2020-09-07 | Titanium extraction tailing aerated concrete |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010930454.4A CN111995347A (en) | 2020-09-07 | 2020-09-07 | Titanium extraction tailing aerated concrete |
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| CN111995347A true CN111995347A (en) | 2020-11-27 |
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| CN202010930454.4A Pending CN111995347A (en) | 2020-09-07 | 2020-09-07 | Titanium extraction tailing aerated concrete |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830727A (en) * | 2010-05-07 | 2010-09-15 | 攀钢集团钢铁钒钛股份有限公司 | Gas forming material for aerated concrete and preparation method thereof |
| CN109400084A (en) * | 2018-12-07 | 2019-03-01 | 西南科技大学 | A kind of high solid waste alkali-activated carbonatite mentions titanium slag and stablizes soil and preparation method thereof |
-
2020
- 2020-09-07 CN CN202010930454.4A patent/CN111995347A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830727A (en) * | 2010-05-07 | 2010-09-15 | 攀钢集团钢铁钒钛股份有限公司 | Gas forming material for aerated concrete and preparation method thereof |
| CN109400084A (en) * | 2018-12-07 | 2019-03-01 | 西南科技大学 | A kind of high solid waste alkali-activated carbonatite mentions titanium slag and stablizes soil and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 朱晓燕等: "钛矿渣制备加气混凝土的研究", 《混凝土与水泥制品》 * |
| 朱洪波等: ""一种新型加气混凝土发气材料"", 《建筑材料学报》 * |
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Application publication date: 20201127 |