CN111116176A - Light environment-friendly tundish dry material and preparation method thereof - Google Patents
Light environment-friendly tundish dry material and preparation method thereof Download PDFInfo
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- CN111116176A CN111116176A CN201911298520.4A CN201911298520A CN111116176A CN 111116176 A CN111116176 A CN 111116176A CN 201911298520 A CN201911298520 A CN 201911298520A CN 111116176 A CN111116176 A CN 111116176A
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- 239000000463 material Substances 0.000 title claims abstract description 88
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 48
- 239000011449 brick Substances 0.000 claims abstract description 38
- 239000002699 waste material Substances 0.000 claims abstract description 38
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 239000010450 olivine Substances 0.000 claims abstract description 13
- 229910052609 olivine Inorganic materials 0.000 claims abstract description 13
- 238000005245 sintering Methods 0.000 claims abstract description 13
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 11
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 239000004571 lime Substances 0.000 claims abstract description 11
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 9
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 9
- 235000014380 magnesium carbonate Nutrition 0.000 claims abstract description 9
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000007767 bonding agent Substances 0.000 claims abstract description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 64
- 239000000395 magnesium oxide Substances 0.000 claims description 32
- 239000000203 mixture Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 20
- 229910021538 borax Inorganic materials 0.000 claims description 17
- 239000004328 sodium tetraborate Substances 0.000 claims description 17
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 17
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 229910052796 boron Inorganic materials 0.000 claims description 13
- 229910052799 carbon Inorganic materials 0.000 claims description 13
- 239000011521 glass Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 10
- WRUGWIBCXHJTDG-UHFFFAOYSA-L magnesium sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Mg+2].[O-]S([O-])(=O)=O WRUGWIBCXHJTDG-UHFFFAOYSA-L 0.000 claims description 9
- 229940061634 magnesium sulfate heptahydrate Drugs 0.000 claims description 9
- SPFMQWBKVUQXJV-BTVCFUMJSA-N (2r,3s,4r,5r)-2,3,4,5,6-pentahydroxyhexanal;hydrate Chemical compound O.OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O SPFMQWBKVUQXJV-BTVCFUMJSA-N 0.000 claims description 8
- 229960000673 dextrose monohydrate Drugs 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 2
- 230000007306 turnover Effects 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 14
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 2
- 235000012241 calcium silicate Nutrition 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229960001031 glucose Drugs 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
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- 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
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
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- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
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- 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
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
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Abstract
The invention discloses a light environment-friendly tundish dry material and a preparation method thereof, wherein the light environment-friendly tundish dry material is prepared by stirring and mixing the following components in percentage by weight: 40-60% of main material with the granularity of 1-0mm, 20-60% of waste brick material with the granularity of 1-0mm, 5.5-10% of bonding agent, 0.5-1.2% of sintering agent, 0.4-1.2% of lime powder, 7.5-33.58% of fine powder and 0.02-0.1% of white oil; the main material comprises one or two of magnesite with the granularity of 1-0mm and olivine with the granularity of 1-0 mm; the total adding amount of the main material and the waste brick material is 60-80%. The tundish dry material is environment-friendly, low in masonry cost, stable in structure and convenient to disassemble and turn over.
Description
Technical Field
The invention relates to the field of fireproof tundish dry materials, in particular to a light environment-friendly tundish dry material and a preparation method thereof.
Background
The tundish is important equipment of a steelmaking continuous casting system, and molten steel in the ladle is connected with the crystallizer through the tundish to be poured into industrial products. In the past, a tundish is only used as a container for storing molten steel, but with the development of metallurgical industry, the technical requirements on the tundish are higher and higher, because the functional structure design and the material configuration scheme not only determine the content and distribution of molten steel inclusions, a molten steel temperature field and the like, but also have great influence on the operation cost and safe production of the tundish.
The tundish working lining in the current market is mainly constructed by using a magnesium dry vibration material, and compared with the construction by adopting a coating material, the construction method has the advantages of low labor intensity, simplicity and convenience. At present, most tundish dry materials used in the market are resin-bonded magnesium dry materials, and although the use of the tundish dry materials can basically meet the production requirements, the tundish dry materials still have certain defects:
firstly, the method comprises the following steps: the large density also causes the thermal conductivity coefficient of the dry material to be too large, and the heat of molten steel is dissipated too fast, thereby requiring the increase of the temperature of molten steel in the tundish, which can cause the increase of the smelting cost of a steel mill;
secondly, the method comprises the following steps: in the traditional magnesium dry material formula, the main material mainly comprises magnesia, so that the material cost is high, the raw material source is single, the market fluctuation is large, and the stability and the economic benefit of an enterprise in production are adversely affected;
thirdly, the method comprises the following steps: although the phenolic resin as a bonding agent has high strength, the resin material has high cost, is limited in economy and has certain smell;
fourthly: the fine powder in the traditional tundish dry material is directly added without any treatment, and the dust during production and construction has great influence on the environment and the physical health of workers;
fifth, the method comprises the following steps: the tundish dry material is attached to the surface of the permanent lining castable, so that not only is a certain normal-temperature strength demolding strength required, but also the medium-high temperature strength is required to reach a certain standard, otherwise, the tundish is easy to collapse in the baking process or in the casting process;
sixth: the tundish is difficult to disassemble and turn over after being used.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a light environment-friendly tundish dry material which is environment-friendly, low in masonry cost, stable in structure and convenient to disintegrate and turn over and a preparation method thereof.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the light environment-friendly tundish dry material comprises the following components in percentage by weight: 40-60% of main material with the granularity of 1-0mm, 20-60% of waste brick material with the granularity of 1-0mm, 5.5-10% of bonding agent, 0.5-1.2% of sintering agent, 0.4-1.2% of lime powder, 7.5-33.58% of fine powder and 0.02-0.1% of white oil; the main material comprises one or two of magnesite with the granularity of 1-0mm and olivine with the granularity of 1-0 mm; the total adding amount of the main material and the waste brick material is 60-80%.
Preferably, the waste brick material comprises one or two of waste magnesia carbon bricks with the granularity of 1-0mm and waste magnesia bricks with the granularity of 1-0 mm; the addition amount of the waste brick material of a single variety is 10-30% by weight percentage.
Preferably, the binding agent consists of glucose monohydrate and magnesium sulfate heptahydrate; the dextrose monohydrate accounts for 5 to 8 percent by weight; the magnesium sulfate heptahydrate is 0.5-2%.
Preferably, the sintering agent consists of boron glass powder and borax; the boron glass powder accounts for 0 to 0.8 percent by weight; 0 to 0.8 percent of borax and 0.5 to 1.2 percent of the total addition amount of the borax and the borax.
Preferably, the fine powder is 100-mesh fine powder of magnesite with purity of more than or equal to 90 percent or 100-mesh fine powder of waste magnesia carbon bricks.
Preferably, the particle size of the lime powder is 200 meshes.
A preparation method of a light environment-friendly tundish dry material comprises the following steps:
the method comprises the following steps: mixing the fine powder and the sintering agent according to a ratio of 5:1, adding the mixture into a ball mill, and grinding for about 1 hour to obtain a mixture, and bagging the mixture for later use;
step two: adding the main material, the waste brick material and the white oil into a stirrer, and stirring for 2 min;
step three: and (4) adding the mixture obtained in the step one and other materials into a stirrer, and stirring for 15-20min to obtain a finished product.
The invention has the beneficial effects that:
firstly, the method comprises the following steps: aiming at the problems of overlarge critical granularity (generally 5mm or 3 mm) and overlarge body density caused by unreasonable gradation, the critical granularity is adjusted to 1mm, the specific surface area of the material is greatly improved, the main material is mainly 1-0mm in granularity, accounts for 60-80%, and the balance is 100-mesh fine powder, a bonding agent, a sintering agent and the like, so that the stacking density of the dry material can be reduced by nearly 10-20% compared with the dry material adopting the critical granularity of 3mm or 5mm, after the critical granularity is reduced, segregation caused by vibration in the material construction process is greatly reduced, and the material integrity is good;
secondly, the method comprises the following steps: aiming at the problems that the main material in the traditional magnesium dry material formula is mainly magnesia, the material cost is high, the raw material source is single, the market fluctuation is large, and the stability and the economic benefit of an enterprise are adversely affected; the invention adopts the composition of different raw materials such as magnesite, olivine, waste magnesia carbon bricks, waste magnesia bricks and the like, greatly enriches the selection range of the raw materials, greatly reduces the cost and is environment-friendly; because the waste brick material has high quality fluctuation, the addition amount of the waste brick material of a single variety needs to be carefully controlled, the addition amount is controlled between 10 and 30 percent, and if the waste brick material is added according to two compounds, the total addition amount is controlled between 20 and 60 percent; because the magnesite and the olivine are new raw materials, the quality is relatively stable, the addition amount is relatively loose, and the adjustment can be carried out according to the technological requirements of clients;
thirdly, the method comprises the following steps: the problems of high cost and certain smell of the phenolic resin are solved; the invention uses dextrose monohydrate and magnesium sulfate heptahydrate to replace, thus improving the environmental protection;
fourthly: aiming at the problems that the fine powder in the traditional tundish dry material is directly added without any treatment, and the dust during production and construction has great influence on the environment and the physical health of workers, the invention greatly reduces the precipitation of the dust by adding the industrial white oil during production, the addition amount of the white oil is controlled to be 0.02-0.1 percent, the white oil adding method comprises the steps of firstly adding the main material and the waste brick material into a stirrer, then adding the white oil, stirring for 2min, then adding other raw materials, and continuing stirring, thus greatly reducing the precipitation of the dust and improving the working environment;
fifth, the method comprises the following steps: the problem that the tundish collapses during baking or casting is easily caused by the fact that a certain normal-temperature strength demolding strength is required for a tundish dry material, and a certain standard is required for medium-high temperature strength; according to the invention, after a burdening scheme with the critical granularity of 1mm is adopted, the requirement on sintering strength is higher, the sintering of the material is promoted by compositely adding boron glass powder and borax, and the adding method of the sintering agent is as follows: mixing fine sand and sintering agent according to a ratio of 5:1, adding the mixture into a ball mill, grinding for about 1h, and discharging, so that the sintering agent can be fully dispersed in the material;
sixth: aiming at the problem that the tundish is difficult to disintegrate and turn over after being used, the invention adds 0.4-1.2% of lime powder with 200 meshes into the material, CaO in the lime powder reacts with silicon dioxide in the material at high temperature to generate dicalcium silicate, and the dicalcium silicate crystal forms are transformed into volume and expand to generate pulverization after being cooled, thereby promoting the disintegration of the tundish body.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below.
Example 1:
the light environment-friendly tundish dry material comprises the following components in percentage by weight: 20 percent of magnesite with the granularity of 1-0mm and the purity of more than or equal to 90, 30 percent of olivine with the granularity of 1-0mm, 25 percent of waste magnesia carbon brick with the granularity of 1-0mm, 16.3 percent of magnesite fine powder with the granularity of 100 meshes and the purity of more than or equal to 90, 7 percent of dextrose monohydrate, 0.5 percent of magnesium sulfate heptahydrate, 0.3 percent of boron glass powder, 0.3 percent of borax, 0.6 percent of lime powder and 0.05 percent of white oil.
A preparation method of a light environment-friendly tundish dry material comprises the following steps:
the method comprises the following steps: mixing 100-mesh magnesia fine powder with purity of more than or equal to 90, boron glass powder and borax according to a ratio of 5:1, adding the mixture into a ball mill, grinding for about 1 hour to obtain a mixture, and bagging for later use;
step two: adding magnesite with granularity of 1-0mm and purity not less than 90, olivine with granularity of 1-0mm, waste magnesia carbon brick with granularity of 1-0mm and white oil into a stirrer, and stirring for 2 min;
step three: and (4) adding the mixture obtained in the step one and other materials into a stirrer, and stirring for 15-20min to obtain a finished product.
Example 2
The light environment-friendly tundish dry material comprises the following components in percentage by weight: 35 percent of olivine with the granularity of 1-0mm, 20 percent of waste magnesia carbon brick with the granularity of 1-0mm, 20 percent of waste magnesia brick with the granularity of 1-0mm, 14.9 percent of magnesia fine powder with the purity of 100 meshes being more than or equal to 90, 7.5 percent of dextrose monohydrate, 1 percent of magnesium sulfate heptahydrate, 0.4 percent of boron glass powder, 0.4 percent of borax, 0.8 percent of lime powder and 0.05 percent of white oil.
A preparation method of a light environment-friendly tundish dry material comprises the following steps:
the method comprises the following steps: mixing 100-mesh magnesia fine powder with purity of more than or equal to 90, boron glass powder and borax according to a ratio of 5:1, adding the mixture into a ball mill, grinding for about 1 hour to obtain a mixture, and bagging for later use;
step two: adding olivine with particle size of 1-0mm, waste magnesia carbon brick with particle size of 1-0mm, waste magnesia brick with particle size of 1-0mm and white oil into a stirrer, and stirring for 2 min;
step three: and (4) adding the mixture obtained in the step one and other materials into a stirrer, and stirring for 15-20min to obtain a finished product.
Example 3
The light environment-friendly tundish dry material comprises the following components in percentage by weight: 20 percent of olivine with the granularity of 1-0mm, 30 percent of waste magnesia carbon brick with the granularity of 1-0mm, 25 percent of waste magnesia brick with the granularity of 1-0mm, 14.8 percent of magnesia fine powder with the purity of 100 meshes being more than or equal to 90, 7.5 percent of dextrose monohydrate, 1 percent of magnesium sulfate heptahydrate, 0.6 percent of boron glass powder, 0.6 percent of borax, 0.5 percent of lime powder and 0.07 percent of white oil.
A preparation method of a light environment-friendly tundish dry material comprises the following steps:
the method comprises the following steps: mixing 100-mesh magnesia fine powder with purity of more than or equal to 90, boron glass powder and borax according to a ratio of 5:1, adding the mixture into a ball mill, grinding for about 1 hour to obtain a mixture, and bagging for later use;
step two: adding olivine with particle size of 1-0mm, waste magnesia carbon brick with particle size of 1-0mm, waste magnesia brick with particle size of 1-0mm and white oil into a stirrer, and stirring for 2 min;
step three: and (4) adding the mixture obtained in the step one and other materials into a stirrer, and stirring for 15-20min to obtain a finished product.
Example 4
The light environment-friendly tundish dry material comprises the following components in percentage by weight: 45 percent of olivine with the granularity of 1-0mm, 30 percent of waste magnesia carbon brick with the granularity of 1-0mm, 10 percent of magnesia fine powder with the purity of 100 meshes being more than or equal to 90, 5.3 percent of waste magnesia brick fine powder with the granularity of 100 meshes, 7 percent of dextrose monohydrate, 1 percent of magnesium sulfate heptahydrate, 0.6 percent of boron glass powder, 0.6 percent of borax, 0.5 percent of lime powder and 0.07 percent of white oil.
A preparation method of a light environment-friendly tundish dry material comprises the following steps:
the method comprises the following steps: mixing 100-mesh magnesia fine powder with purity more than or equal to 90, 100-mesh waste magnesia brick fine powder, boron glass powder and borax according to a ratio of 5:1, adding the mixture into a ball mill, and grinding for about 1 hour to obtain a mixture, and bagging the mixture for later use;
step two: adding olivine with particle size of 1-0mm, waste magnesia carbon brick with particle size of 1-0mm and white oil into a stirrer, and stirring for 2 min;
step three: and (4) adding the mixture obtained in the step one and other materials into a stirrer, and stirring for 15-20min to obtain a finished product.
The embodiments described above are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (7)
1. The light environment-friendly tundish dry material is characterized in that: comprises the following components in percentage by weight: 40-60% of main material with the granularity of 1-0mm, 20-60% of waste brick material with the granularity of 1-0mm, 5.5-10% of bonding agent, 0.5-1.2% of sintering agent, 0.4-1.2% of lime powder, 7.5-33.58% of fine powder and 0.02-0.1% of white oil; the main material comprises one or two of magnesite with the granularity of 1-0mm and olivine with the granularity of 1-0 mm; the total adding amount of the main material and the waste brick material is 60-80%.
2. The light environment-friendly tundish dry material according to claim 1, characterized in that: the waste brick material comprises one or two of waste magnesia carbon bricks with the granularity of 1-0mm and waste magnesia bricks with the granularity of 1-0 mm; the addition amount of the waste brick material of a single variety is 10-30% by weight percentage.
3. The light environment-friendly tundish dry material according to claim 1, characterized in that: the binding agent consists of dextrose monohydrate and magnesium sulfate heptahydrate; the dextrose monohydrate accounts for 5 to 8 percent by weight; the magnesium sulfate heptahydrate is 0.5-2%.
4. The light environment-friendly tundish dry material according to claim 1, characterized in that: the sintering agent consists of boron glass powder and borax; the boron glass powder accounts for 0 to 0.8 percent by weight; 0 to 0.8 percent of borax and 0.5 to 1.2 percent of the total addition amount of the borax and the borax.
5. The light environment-friendly tundish dry material according to claim 1, characterized in that: the fine powder is 100-mesh magnesia fine powder with the purity of more than or equal to 90 percent or 100-mesh waste magnesia carbon brick fine powder.
6. The light environment-friendly tundish dry material according to claim 1, characterized in that: the particle size of the lime powder is 200 meshes.
7. A method for preparing a light-weight environment-friendly tundish dry material according to any one of claims 1 to 6, which is characterized in that: the method comprises the following steps:
the method comprises the following steps: mixing the fine powder and the sintering agent according to a ratio of 5:1, adding the mixture into a ball mill, and grinding for about 1 hour to obtain a mixture, and bagging the mixture for later use;
step two: adding the main material, the waste brick material and the white oil into a stirrer, and stirring for 2 min;
step three: and (4) adding the mixture obtained in the step one and other materials into a stirrer, and stirring for 15-20min to obtain a finished product.
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| CN111960833A (en) * | 2020-08-26 | 2020-11-20 | 廊坊森德科技有限公司 | Environment-friendly dry type vibration bonding agent |
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