CN114478032A - High-strength nano castable for iron-making slag-disintegrating pit - Google Patents
High-strength nano castable for iron-making slag-disintegrating pit Download PDFInfo
- Publication number
- CN114478032A CN114478032A CN202111677984.3A CN202111677984A CN114478032A CN 114478032 A CN114478032 A CN 114478032A CN 202111677984 A CN202111677984 A CN 202111677984A CN 114478032 A CN114478032 A CN 114478032A
- Authority
- CN
- China
- Prior art keywords
- parts
- granularity
- castable
- iron
- brown corundum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3241—Chromium oxides, chromates, or oxide-forming salts thereof
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/447—Phosphates or phosphites, e.g. orthophosphate, hypophosphite
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5216—Inorganic
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5427—Particle size related information expressed by the size of the particles or aggregates thereof millimeter or submillimeter sized, i.e. larger than 0,1 mm
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
- C04B2235/9692—Acid, alkali or halogen resistance
Abstract
The invention discloses a high-strength nano castable for an iron-making slag-disintegrating pit, which is prepared from the following raw materials in parts by weight: 20-30 parts of a homogenizing material with the granularity of 8-15 mm; 12-18 parts of a homogenizing material with the granularity of 5-8 mm; 12-18 parts of brown corundum with the granularity of 3-5 mm; 12-18 parts of brown corundum with the granularity of 0-3 mm; 5-7 parts of micro silicon powder with the sieving mesh number not less than 200 meshes; 6-8 parts of active alumina powder with the sieving mesh number not less than 325 meshes; 12-18 parts of pure calcium aluminate cement, 1.4-2.0 parts of heat-resistant steel fiber, 0.4-0.6 part of chromium oxide green, 0.08-0.12 part of sodium hexametaphosphate, 0.04-0.06 part of high-efficiency water reducing agent and 0.08-0.12 part of explosion-proof fiber. According to the invention, by optimizing the particle size distribution of the raw materials, adopting the high-efficiency water reducing agent and sodium hexametaphosphate together and adopting a certain amount of chromium oxide green, the high-temperature strength performance and the slag corrosion resistance can be obviously improved, and the obtained castable is high in strength and excellent in slag corrosion resistance by combining the effects of other raw materials, and can be well used for meeting the requirements of iron-making slag-stuffy pits.
Description
Technical Field
The invention belongs to the technical field of refractory material preparation, and particularly relates to a high-strength nano castable for an iron-making slag-smoldering pit and a preparation method thereof.
Background
The refractory castable is a granular or powdery material prepared by adding a certain amount of bonding agent into refractory materials, has high fluidity and is an unshaped refractory material molded by a pouring mode. The iron-making slag disintegrating pit is a device commonly used for steel slag treatment, and is in a high-temperature, high-pressure and high-humidity environment for a long time in the slag disintegrating process, so that the castable for the iron-making slag disintegrating pit is required to have higher strength, slag corrosion resistance and stability compared with a common refractory castable.
The prior refractory castable is generally added with phosphates such as sodium hexametaphosphate, sodium tripolyphosphate and the like as additives for promoting hardening and improving the strength of the castable, but researches show that the phosphates are easy to soften at high temperature and can not meet the requirement of the refractory castable for an iron-making slag-disintegrating pit.
Disclosure of Invention
The invention aims to provide a high-strength nano castable for an iron-making slag-disintegrating pit and a preparation method thereof, aiming at solving the defects of the prior art.
The purpose of the invention is realized by the following technical scheme:
a high-strength nano castable for an iron-making slag-disintegrating pit is prepared from the following raw materials in parts by weight:
20-30 parts of a homogenizing material with the granularity of 8-15 mm;
12-18 parts of a homogenizing material with the granularity of 5-8 mm;
12-18 parts of brown corundum with the granularity of 3-5 mm;
12-18 parts of brown corundum with the granularity of 0-3 mm;
5-7 parts of micro silicon powder with the sieving mesh number not less than 200 meshes;
6-8 parts of active alumina powder with the sieving mesh number not less than 325 meshes;
12-18 parts of pure calcium aluminate cement, 1.4-2.0 parts of heat-resistant steel fiber, 0.4-0.6 part of chromium oxide green, 0.08-0.12 part of sodium hexametaphosphate, 0.04-0.06 part of high-efficiency water reducing agent and 0.08-0.12 part of explosion-proof fiber.
Preferably, the feed additive is prepared from the following raw materials in parts by weight:
25 parts of a homogenizing material with the granularity of 8-15 mm;
15 parts of a homogenizing material with the granularity of 5-8 mm;
15 parts of brown corundum with the granularity of 3-5 mm;
15 parts of brown corundum with the granularity of 0-3 mm;
6 portions of micro silicon powder with the sieving mesh number not less than 200 meshes;
7 parts of active alumina powder with the sieving mesh number not less than 325 meshes;
15 parts of pure calcium aluminate cement, 1.7 parts of heat-resistant steel fiber, 0.5 part of chromium oxide green, 0.1 part of sodium hexametaphosphate, 0.05 part of high-efficiency water reducing agent and 0.1 part of explosion-proof fiber.
Preferably, Al in the brown corundum2O3The mass percentage content is more than or equal to 95 percent, and Al in the homogenized material2O3The mass percentage content is more than or equal to 88 percent, and Al in the active alumina powder2O3The mass percentage content is more than or equal to 98 percent.
Preferably, the high-efficiency water reducing agent is one or more of naphthalene series, sulfamate series and aliphatic high-efficiency water reducing agent.
Preferably, the heat-resistant steel fiber is 446 steel fiber.
Preferably, the homogenizing material is bauxite.
The preparation method of the high-strength nano castable for the iron-making slag-disintegrating pit comprises the following steps:
firstly, uniformly stirring a homogenizing material with the particle size of 8-15 mm, a homogenizing material with the particle size of 5-8 mm, brown corundum with the particle size of 3-5 mm and brown corundum with the particle size of 0-3 mm, then adding pure calcium aluminate cement, uniformly stirring, then adding other raw materials except the water reducing agent, uniformly stirring, then adding the water reducing agent, and uniformly stirring to obtain the high-performance aluminum oxide.
According to the invention, by optimizing the particle size distribution of the raw materials and adopting six-grade gradation (8-15 mm, 5-8 mm, 3-5 mm, 0-3 mm, 200 meshes and 325 meshes), the fluidity of the casting material is improved, the volume density and the strength are enhanced, and the casting material can replace part of water while the fluidity is enhanced, so that the technical effect of reducing water is achieved. The high-efficiency water reducing agent and the sodium hexametaphosphate are used together, the high-efficiency water reducing effect of the high-efficiency water reducing agent is utilized, the phosphate usage amount is reduced, the water consumption is obviously reduced, the dispersibility is enhanced, and the strength and the stability of the castable are improved.
Detailed Description
The invention provides a high-strength nano castable for an iron-making slag-disintegrating pit, which is prepared from the following raw materials in parts by weight:
20-30 parts of a homogenizing material with the granularity of 8-15 mm;
12-18 parts of a homogenizing material with the granularity of 5-8 mm;
12-18 parts of brown corundum with the granularity of 3-5 mm;
12-18 parts of brown corundum with the granularity of 0-3 mm;
5-7 parts of micro silicon powder with the sieving mesh number not less than 200 meshes (75 um);
6-8 parts of active alumina powder with the sieving mesh number not less than 325 meshes (45 um);
12-18 parts of pure calcium aluminate cement, 1.4-2.0 parts of heat-resistant steel fiber, 0.4-0.6 part of chromium oxide green, 0.08-0.12 part of sodium hexametaphosphate, 0.04-0.06 part of high-efficiency water reducing agent and 0.08-0.12 part of explosion-proof fiber.
Among the raw materials, the homogenizing material and brown fused alumina are used as aggregate, the homogenizing material takes alumina as a main component, and preferably adopts high-quality bauxite, which has higher volume density and good steel slag corrosion resistance under the high-temperature condition. Compared with bauxite, brown corundum contains a small amount of elements such as iron, silicon, titanium and the like besides alumina serving as a main component, and can bear long-term corrosion of steel slag. The pure calcium aluminate cement has higher alumina content, and can well combine homogenization materials with different particle size distributions with brown corundum. The added silica fume and activated alumina powder can not only play an original role, but also have small granularity, can be well filled in large particles, further improve the structural density and strength, and improve the steel slag corrosion resistance of the steel slag. The heat-resistant steel fiber can prevent brown corundum and pure calcium aluminate cement from generating expansion difference in a high-temperature state during mixing, and can effectively improve the toughness and the impact strength of the product. The explosion-proof fiber takes polypropylene as a main material, so that the internal stress can be effectively reduced, the explosion can be prevented, and the overall strength can be improved.
On the basis of the raw materials, the particle size distribution of the raw materials is optimized, and six-grade gradation (8-15 mm, 5-8 mm, 3-5 mm, 0-3 mm, 200 meshes and 325 meshes) is adopted, so that the fluidity of the castable is improved, the volume density and the strength are enhanced, and the castable can replace part of water while the fluidity is enhanced, and has the technical effect of reducing water. The high-efficiency water reducing agent and the sodium hexametaphosphate are used together, the high-efficiency water reducing effect of the high-efficiency water reducing agent is utilized, the phosphate usage amount is reduced, the water consumption is obviously reduced, the dispersibility is enhanced, and the strength and the stability of the castable are improved.
Preferably, the feed additive is prepared from the following raw materials in parts by weight:
25 parts of a homogenizing material with the granularity of 8-15 mm;
15 parts of a homogenizing material with the granularity of 5-8 mm;
15 parts of brown corundum with the granularity of 3-5 mm;
15 parts of brown corundum with the granularity of 0-3 mm;
6 parts of micro silicon powder with the sieving mesh number not less than 200 meshes (75 um);
7 parts of active alumina powder with the sieving mesh number not less than 325 meshes (45 um);
15 parts of pure calcium aluminate cement, 1.7 parts of heat-resistant steel fiber, 0.5 part of chromium oxide green, 0.1 part of sodium hexametaphosphate, 0.05 part of high-efficiency water reducing agent and 0.1 part of explosion-proof fiber.
Preferably, Al in brown corundum2O3The mass percentage content is more than or equal to 95 percent, and Al in the homogenized material2O3The mass percentage content is more than or equal to 88 percent, and Al in the active alumina powder2O3The mass percentage content is more than or equal to 98 percent. The content of effective components in the raw materials is limited, so that the effect of the raw materials can be enhanced, and the product performance can be improved.
Preferably, the water reducing agent is one or more of naphthalene series, sulfamate series and aliphatic high-efficiency water reducing agent, and the water reducing rate is more than 12%.
Preferably, the heat-resistant steel fiber is 446 steel fiber which contains chromium, so that the high-temperature strength and the high-temperature corrosion resistance are better, and compared with other steel fibers, the corrosion resistance of the castable can be improved.
The invention also provides a preparation method of the high-strength nano castable for the iron-making slag-disintegrating pit, which comprises the following steps:
firstly, uniformly stirring a homogenizing material with the particle size of 8-15 mm, a homogenizing material with the particle size of 5-8 mm, brown corundum with the particle size of 3-5 mm and brown corundum with the particle size of 0-3 mm, then adding pure calcium aluminate cement, uniformly stirring, then adding other raw materials except the water reducing agent, uniformly stirring, then adding the water reducing agent, and uniformly stirring to obtain the high-performance aluminum oxide. According to the invention, the coarse-particle materials are uniformly mixed, and then the fine-particle materials are gradually added, so that the volume density of the product can be effectively improved.
Example 1
The invention provides a high-strength nano castable for an iron-making slag-disintegrating pit, which is prepared from the following raw materials in parts by weight:
25 parts of bauxite with the granularity of 8-15 mm;
15 parts of bauxite with the granularity of 5-8 mm;
15 parts of brown corundum with the granularity of 3-5 mm;
15 parts of brown corundum with the granularity of 0-3 mm;
6 parts of 200-mesh micro silicon powder;
7 parts of 325-mesh active alumina powder;
15 parts of pure calcium aluminate cement, 1.7 parts of heat-resistant steel fiber (446 steel fiber), 0.5 part of chromium oxide green, 0.1 part of sodium hexametaphosphate, 0.05 part of naphthalene-based superplasticizer (water reduction rate is 15 percent), and 0.1 part of explosion-proof fiber (polypropylene material, length is 3 mm).
Wherein Al is contained in brown corundum2O3The mass percentage content is more than or equal to 95 percent, and Al in the homogenized material2O3The mass percentage content is more than or equal to 88 percent, and Al in the active alumina powder2O3The mass percentage content is more than or equal to 98 percent.
The preparation method of the high-strength nano castable for the iron-making slag-disintegrating pit comprises the following steps:
firstly, uniformly stirring bauxite with the granularity of 8-15 mm, bauxite with the granularity of 5-8 mm, brown corundum with the granularity of 3-5 mm and brown corundum with the granularity of 0-3 mm, then adding pure calcium aluminate cement, adding other raw materials except a water reducing agent after uniformly stirring, adding the water reducing agent after uniformly stirring, and uniformly stirring to obtain the high-performance alumina.
The performance of the refractory castable obtained in this example was analyzed by a conventional method, and the results were as follows: volume density 2890kg/m3The refractoriness is 1650 ℃, 1350 ℃ compressive strength is 192Mpa, and the alkali resistance is first grade (1100 ℃, 5 h).
Comparative example 1
0.1 part of sodium tripolyphosphate is adopted to replace the naphthalene-based superplasticizer in the embodiment, other parameters are the same as those in the embodiment 1, and the volume density of the obtained refractory castable is 2810kg/m3The refractoriness is 1590 ℃, the compressive strength is 175Mpa at 1350 ℃, and the alkali resistance is first grade (1100 ℃, 5 h).
Comparative example 2
The volume density of the refractory castable material obtained by replacing the naphthalene-based superplasticizer in the embodiment with 0.1 part of sodium tripolyphosphate, adding no chromium oxide green and adopting the same other parameters as those in the embodiment 1 is 2795kg/m3The refractoriness is 1570 ℃, the compression strength is 173Mpa at 1350 ℃ and the alkali resistance is two grades (1100 ℃, 5 h).
Example 2
The invention provides a high-strength nano castable for an iron-making slag-disintegrating pit, which is prepared from the following raw materials in parts by weight:
22 parts of bauxite with the granularity of 8-15 mm;
18 parts of bauxite with the granularity of 5-8 mm;
15 parts of brown corundum with the granularity of 3-5 mm;
15 parts of brown corundum with the granularity of 0-3 mm;
5 parts of 200-mesh micro silicon powder;
8 parts of 325-mesh active alumina powder;
15 parts of pure calcium aluminate cement, 1.7 parts of heat-resistant steel fiber (446 steel fiber), 0.5 part of chromium oxide green, 0.09 part of sodium hexametaphosphate, 0.06 part of naphthalene-based superplasticizer (water reduction rate is 15 percent), and 0.11 part of explosion-proof fiber (polypropylene material, length is 3 mm).
The preparation method of the high-strength nano castable for the iron-making slag-disintegrating pit comprises the following steps:
firstly, uniformly stirring bauxite with the granularity of 8-15 mm, bauxite with the granularity of 5-8 mm, brown corundum with the granularity of 3-5 mm and brown corundum with the granularity of 0-3 mm, then adding pure calcium aluminate cement, adding other raw materials except a water reducing agent after uniformly stirring, adding the water reducing agent after uniformly stirring, and uniformly stirring to obtain the high-performance alumina.
The performance of the refractory castable obtained in this example was analyzed by a conventional method, and the results were as follows: volume density 2843kg/m3The refractoriness is 1620 ℃, the compressive strength is 185Mpa at 1350 ℃, and the alkali resistance is first grade (1100 ℃, 5 h).
Example 3
The invention provides a high-strength nano castable for an iron-making slag-disintegrating pit, which is prepared from the following raw materials in parts by weight:
30 parts of bauxite with the granularity of 8-15 mm;
12 parts of bauxite with the granularity of 5-8 mm;
15 parts of brown corundum with the granularity of 3-5 mm;
13 parts of brown corundum with the granularity of 0-3 mm;
7 parts of 200-mesh micro silicon powder;
7 parts of 325-mesh active alumina powder;
16 parts of pure calcium aluminate cement, 1.9 parts of heat-resistant steel fiber (446 steel fiber), 0.4 part of chromium oxide green, 0.1 part of sodium hexametaphosphate, 0.05 part of naphthalene-based superplasticizer (water reduction rate is 15 percent), and 0.08 part of explosion-proof fiber (polypropylene material, length is 3 mm).
The preparation method of the high-strength nano castable for the iron-making slag-disintegrating pit comprises the following steps:
firstly, uniformly stirring bauxite with the granularity of 8-15 mm, bauxite with the granularity of 5-8 mm, brown corundum with the granularity of 3-5 mm and brown corundum with the granularity of 0-3 mm, then adding pure calcium aluminate cement, adding other raw materials except a water reducing agent after uniformly stirring, adding the water reducing agent after uniformly stirring, and uniformly stirring to obtain the high-performance alumina.
The resistance obtained for this example was measured by a conventional methodThe performance of the fire castable is analyzed, and the results are as follows: volume density 2854kg/m3The refractoriness is 1640 ℃, the compressive strength is 183Mpa at 1350 ℃ and the alkali resistance is first grade (1100 ℃, 5 h).
Example 4
The invention provides a high-strength nano castable for an iron-making slag-disintegrating pit, which is prepared from the following raw materials in parts by weight:
25 parts of bauxite with the granularity of 8-15 mm;
15 parts of bauxite with the granularity of 5-8 mm;
12 parts of brown corundum with the granularity of 3-5 mm;
17 parts of brown corundum with the granularity of 0-3 mm;
5 parts of 200-mesh micro silicon powder;
7 parts of 325-mesh active alumina powder;
13 parts of pure calcium aluminate cement, 1.5 parts of heat-resistant steel fiber (446 steel fiber), 0.6 part of chromium oxide green, 0.09 part of sodium hexametaphosphate, 0.05 part of aliphatic high-efficiency water reducing agent (water reducing rate of 16 percent) and 0.1 part of explosion-proof fiber (polypropylene material, length of 3 mm).
The preparation method of the high-strength nano castable for the iron-making slag-disintegrating pit comprises the following steps:
firstly, uniformly stirring bauxite with the granularity of 8-15 mm, bauxite with the granularity of 5-8 mm, brown corundum with the granularity of 3-5 mm and brown corundum with the granularity of 0-3 mm, then adding pure calcium aluminate cement, adding other raw materials except a water reducing agent after uniformly stirring, adding the water reducing agent after uniformly stirring, and uniformly stirring to obtain the high-performance alumina.
Example 5
The invention provides a high-strength nano castable for an iron-making slag-disintegrating pit, which is prepared from the following raw materials in parts by weight:
25 parts of bauxite with the granularity of 8-15 mm;
13 parts of bauxite with the granularity of 5-8 mm;
15 parts of brown corundum with the granularity of 3-5 mm;
15 parts of brown corundum with the granularity of 0-3 mm;
6 parts of 200-mesh micro silicon powder;
7 parts of 325-mesh active alumina powder;
17 parts of pure calcium aluminate cement, 1.6 parts of heat-resistant steel fiber (446 steel fiber), 0.6 part of chromium oxide green, 0.1 part of sodium hexametaphosphate, 0.04 part of aliphatic high-efficiency water reducing agent (water reducing rate is 16 percent), and 0.12 part of explosion-proof fiber (polypropylene material, length is 3 mm).
The preparation method of the high-strength nano castable for the iron-making slag-disintegrating pit comprises the following steps:
firstly, uniformly stirring bauxite with the granularity of 8-15 mm, bauxite with the granularity of 5-8 mm, brown corundum with the granularity of 3-5 mm and brown corundum with the granularity of 0-3 mm, then adding pure calcium aluminate cement, adding other raw materials except a water reducing agent after uniformly stirring, adding the water reducing agent after uniformly stirring, and uniformly stirring to obtain the high-performance alumina.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. The high-strength nano castable for the iron-making slag-smoldering pit is characterized by being prepared from the following raw materials in parts by weight:
20-30 parts of a homogenizing material with the granularity of 8-15 mm;
12-18 parts of a homogenizing material with the granularity of 5-8 mm;
12-18 parts of brown corundum with the granularity of 3-5 mm;
12-18 parts of brown corundum with the granularity of 0-3 mm;
5-7 parts of micro silicon powder with the sieving mesh number not less than 200 meshes;
6-8 parts of active alumina powder with the sieving mesh number not less than 325 meshes;
12-18 parts of pure calcium aluminate cement, 1.4-2.0 parts of heat-resistant steel fiber, 0.4-0.6 part of chromium oxide green, 0.08-0.12 part of sodium hexametaphosphate, 0.04-0.06 part of high-efficiency water reducing agent and 0.08-0.12 part of explosion-proof fiber.
2. The high-strength nano castable for the iron-making slag-smoldering pit according to claim 1, which is prepared from the following raw materials in parts by weight:
25 parts of a homogenizing material with the granularity of 8-15 mm;
15 parts of a homogenizing material with the granularity of 5-8 mm;
15 parts of brown corundum with the granularity of 3-5 mm;
15 parts of brown corundum with the granularity of 0-3 mm;
6 portions of micro silicon powder with the sieving mesh number not less than 200 meshes;
7 parts of active alumina powder with the sieving mesh number not less than 325 meshes;
15 parts of pure calcium aluminate cement, 1.7 parts of heat-resistant steel fiber, 0.5 part of chromium oxide green, 0.1 part of sodium hexametaphosphate, 0.05 part of high-efficiency water reducing agent and 0.1 part of explosion-proof fiber.
3. The high-strength nano castable for the iron-making slag-stuffy pit according to claim 1, wherein,
al in the brown corundum2O3The mass percentage content is more than or equal to 95 percent, and Al in the homogenized material2O3The mass percentage content is more than or equal to 88 percent, and Al in the active alumina powder2O3The mass percentage content is more than or equal to 98 percent.
4. The high-strength nano castable for the iron-making slag-stuffy pit according to claim 1, wherein,
the high-efficiency water reducing agent is one or more of naphthalene series, sulfamate series and aliphatic high-efficiency water reducing agent.
5. The high-strength nano castable for the iron-making slag-stuffy pit according to claim 1, wherein,
the heat-resistant steel fiber is 446 steel fiber.
6. The high-strength nano castable for the iron-making slag-stuffy pit according to claim 1, wherein,
the homogenizing material is bauxite.
7. The preparation method of the high-strength nano castable for the iron-making slag-smoldering pit according to any one of claims 1 to 6, characterized by comprising the following steps:
firstly, uniformly stirring a homogenizing material with the particle size of 8-15 mm, a homogenizing material with the particle size of 5-8 mm, brown corundum with the particle size of 3-5 mm and brown corundum with the particle size of 0-3 mm, then adding pure calcium aluminate cement, uniformly stirring, then adding other raw materials except the water reducing agent, uniformly stirring, then adding the water reducing agent, and uniformly stirring to obtain the high-performance aluminum oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111677984.3A CN114478032A (en) | 2021-12-31 | 2021-12-31 | High-strength nano castable for iron-making slag-disintegrating pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111677984.3A CN114478032A (en) | 2021-12-31 | 2021-12-31 | High-strength nano castable for iron-making slag-disintegrating pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114478032A true CN114478032A (en) | 2022-05-13 |
Family
ID=81509263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111677984.3A Pending CN114478032A (en) | 2021-12-31 | 2021-12-31 | High-strength nano castable for iron-making slag-disintegrating pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114478032A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006182576A (en) * | 2004-12-27 | 2006-07-13 | Toshiba Ceramics Co Ltd | Castable refractories |
| CN101734934A (en) * | 2009-10-28 | 2010-06-16 | 郑州真金耐火材料有限责任公司 | High-strength steel fibre castable |
| CN103396141A (en) * | 2013-08-07 | 2013-11-20 | 武汉钢铁(集团)公司 | Lightweight high-strength heat-insulation refractory castable |
| CN104591757A (en) * | 2015-02-04 | 2015-05-06 | 郑州市瑞沃耐火材料有限公司 | Low-temperature curing abrasion-resistant pouring material |
| CN105481380A (en) * | 2014-09-19 | 2016-04-13 | 青岛百键城环保科技有限公司 | Low-cost novel steel fiber refractory castable |
| CN108752026A (en) * | 2018-07-04 | 2018-11-06 | 湖南湘钢瑞泰科技有限公司 | A kind of aluminium chromium matter fire clay and its production method |
| CN109400125A (en) * | 2018-11-28 | 2019-03-01 | 江苏恒耐炉料集团有限公司 | A kind of cement kiln low temperature wear-resistant castable |
| CN110128119A (en) * | 2019-06-06 | 2019-08-16 | 温县宏兴特种炉料厂 | Blast furnace main iron channel castable and processing method and the method for preparing main trough of blast furnace |
| CN110256090A (en) * | 2019-06-24 | 2019-09-20 | 武汉钢铁有限公司 | A kind of tundish permanent layer lightweight insulated pouring material |
| CN112479689A (en) * | 2020-10-30 | 2021-03-12 | 云南濮耐昆钢高温材料有限公司 | Quick-drying explosion-proof high-strength wear-resistant castable |
| CN113620695A (en) * | 2021-07-19 | 2021-11-09 | 北京利尔高温材料股份有限公司 | High-temperature-resistant iron runner castable and preparation method thereof |
| CN113788690A (en) * | 2021-09-29 | 2021-12-14 | 昆明理工大学 | Zirconium-chromium corundum refractory material for organic solid waste pyrolysis gasification incinerator and preparation method thereof |
-
2021
- 2021-12-31 CN CN202111677984.3A patent/CN114478032A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006182576A (en) * | 2004-12-27 | 2006-07-13 | Toshiba Ceramics Co Ltd | Castable refractories |
| CN101734934A (en) * | 2009-10-28 | 2010-06-16 | 郑州真金耐火材料有限责任公司 | High-strength steel fibre castable |
| CN103396141A (en) * | 2013-08-07 | 2013-11-20 | 武汉钢铁(集团)公司 | Lightweight high-strength heat-insulation refractory castable |
| CN105481380A (en) * | 2014-09-19 | 2016-04-13 | 青岛百键城环保科技有限公司 | Low-cost novel steel fiber refractory castable |
| CN104591757A (en) * | 2015-02-04 | 2015-05-06 | 郑州市瑞沃耐火材料有限公司 | Low-temperature curing abrasion-resistant pouring material |
| CN108752026A (en) * | 2018-07-04 | 2018-11-06 | 湖南湘钢瑞泰科技有限公司 | A kind of aluminium chromium matter fire clay and its production method |
| CN109400125A (en) * | 2018-11-28 | 2019-03-01 | 江苏恒耐炉料集团有限公司 | A kind of cement kiln low temperature wear-resistant castable |
| CN110128119A (en) * | 2019-06-06 | 2019-08-16 | 温县宏兴特种炉料厂 | Blast furnace main iron channel castable and processing method and the method for preparing main trough of blast furnace |
| CN110256090A (en) * | 2019-06-24 | 2019-09-20 | 武汉钢铁有限公司 | A kind of tundish permanent layer lightweight insulated pouring material |
| CN112479689A (en) * | 2020-10-30 | 2021-03-12 | 云南濮耐昆钢高温材料有限公司 | Quick-drying explosion-proof high-strength wear-resistant castable |
| CN113620695A (en) * | 2021-07-19 | 2021-11-09 | 北京利尔高温材料股份有限公司 | High-temperature-resistant iron runner castable and preparation method thereof |
| CN113788690A (en) * | 2021-09-29 | 2021-12-14 | 昆明理工大学 | Zirconium-chromium corundum refractory material for organic solid waste pyrolysis gasification incinerator and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 于仁红: "《Cr2O3微粉加入量对Al2O3-SiO2浇注料性能的影响》", 《河南冶金》 * |
| 马国伟, 中国建材工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111018435B (en) | High-strength high-toughness polymer material and preparation method thereof | |
| CN108358581B (en) | Concrete containing refining slag and preparation method thereof | |
| CN105060792A (en) | Low-dosage steel fiber modified powder concrete | |
| CN103981388B (en) | Tin bronze melting slag former and using method thereof | |
| CN101654375A (en) | Low-carbon magnesia carbon brick | |
| CN109437867B (en) | Aluminum silicon carbide castable for blast furnace tapping main channel and preparation method and application thereof | |
| CN114163222A (en) | Titanium composite corundum silicon carbide wear-resistant castable for cement kiln mouths and preparation method thereof | |
| CN113213797A (en) | Steel slag and slag composite admixture and preparation method and application thereof | |
| CN115893953A (en) | Low-shrinkage ultrahigh-performance concrete and preparation method thereof | |
| CN113651574A (en) | Counterweight cement-based composite material and preparation method thereof | |
| CN102756112A (en) | Composite slag remover for casting | |
| CN106316294A (en) | Reactive powder concrete and preparing method and purpose thereof | |
| CN106747104A (en) | Concrete that a kind of steel-making slag powder and flyash are mixed again and preparation method thereof | |
| CN112079603B (en) | Large-fluidity neutron radiation prevention concrete and preparation method thereof | |
| CN116003092B (en) | Sulfur-based and base solid waste stirring granulation foaming one-step forming baking-free high-strength lightweight aggregate and preparation method and application thereof | |
| CN109095802B (en) | Expansive agent for concrete, concrete and preparation method thereof | |
| CN114478032A (en) | High-strength nano castable for iron-making slag-disintegrating pit | |
| CN107739213B (en) | Repairing material for steel ladle and preparation method thereof | |
| CN113321457B (en) | Method for preparing ultra-high performance concrete by doping oyster shell powder and metakaolin | |
| CN105272311A (en) | Low-cost durable main ditch material | |
| CN112694301B (en) | Long-acting reduction type dolomite powder self-compacting concrete and preparation method thereof | |
| CN104355635A (en) | Casting material and preparation method and use thereof | |
| CN109809804A (en) | A kind of wet injection material and preparation method thereof | |
| CN113860814A (en) | Copper tailing powder active powder concrete and preparation method thereof | |
| CN112919856A (en) | Fiber geopolymer concrete and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |