CN115650702A - Environment-friendly continuous casting tundish dry material and preparation method thereof - Google Patents
Environment-friendly continuous casting tundish dry material and preparation method thereof Download PDFInfo
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- CN115650702A CN115650702A CN202211375383.1A CN202211375383A CN115650702A CN 115650702 A CN115650702 A CN 115650702A CN 202211375383 A CN202211375383 A CN 202211375383A CN 115650702 A CN115650702 A CN 115650702A
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- 239000000463 material Substances 0.000 title claims abstract description 54
- 238000009749 continuous casting Methods 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 130
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 65
- 239000002699 waste material Substances 0.000 claims abstract description 34
- 239000011449 brick Substances 0.000 claims abstract description 33
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 33
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000440 bentonite Substances 0.000 claims abstract description 12
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 12
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 12
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims abstract description 10
- 239000008103 glucose Substances 0.000 claims abstract description 10
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 9
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000001509 sodium citrate Substances 0.000 claims abstract description 8
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims abstract description 8
- 239000011230 binding agent Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 239000007767 bonding agent Substances 0.000 abstract description 5
- 239000001095 magnesium carbonate Substances 0.000 abstract description 5
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 abstract description 5
- 229910000021 magnesium carbonate Inorganic materials 0.000 abstract description 5
- 235000014380 magnesium carbonate Nutrition 0.000 abstract description 5
- 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 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 239000002893 slag Substances 0.000 abstract description 2
- 235000019580 granularity Nutrition 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000005011 phenolic resin Substances 0.000 description 3
- 229920001568 phenolic resin Polymers 0.000 description 3
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229930003836 cresol Natural products 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- -1 formaldehyde, xylenol Chemical class 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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- Ceramic Products (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention relates to an environment-friendly continuous casting tundish dry material and a preparation method thereof, wherein the environment-friendly continuous casting tundish dry material comprises the following components in parts by weight: magnesia carbon waste bricks, magnesia, metal aluminum powder, metal silicon powder, bentonite, industrial glucose, water glass and sodium citrate. The invention takes the waste magnesia carbon bricks and the magnesite with different granularities as raw materials to produce the dry material of the tundish, and the bonding agent is added, thereby effectively reducing the cost, reducing the environmental pollution, being more beneficial to promoting the bonding of the product and improving the oxidation resistance and the slag resistance.
Description
Technical Field
The invention relates to an unshaped refractory material, in particular to an environment-friendly continuous casting tundish dry material and a preparation method thereof.
Background
The dry material of the tundish comprises a magnesium dry material and a magnesium-calcium dry material, and the dry material is a non-aqueous material, so the selection of the bonding agent is particularly important, the selection of the bonding agent needs to feel anhydrous and does not react with magnesia at normal temperature, the dry material has certain strength after being heated at 200-300 ℃ so as to be convenient for demoulding, and the material is sintered into a solid whole at high temperature of about 1550 ℃ so as to have better high-temperature service performance. CN103011862 dry materials for environment-friendly carbon-free tundish use phenolic resin as binder, the curing temperature of phenolic resin is 190 ℃, but in the process of firing dry materials, phenolic resin decomposes partial cresol, formaldehyde, xylenol and other components to release pungent odor, which causes great pollution to environment, and the residue after curing is easy to cause pollution. In order to overcome the problems, CN100453211C A preparation method of a tundish dry working lining comprises the steps of mixing 85-95% of magnesia and 5-10% of glucose or citric acid in percentage by weight, uniformly stirring, and then adopting a forming die to carry out vibration forming. This technique uses inorganic substances such as sugars and metasilicates as binders, and although the release of harmful gases is reduced, the service life is low.
Therefore, how to solve the problems of short service life, high cost, serious pollution, low ladle turning rate, multiple impurities in steel produced in a matched mode and reduction of production cost of the tundish dry material is a technical problem which needs to be solved urgently in the current industry.
Disclosure of Invention
The invention aims to provide an environment-friendly continuous casting tundish dry material, which adopts waste refractory materials and environment-friendly bonding agents, and has low manufacturing cost and environmental protection.
In order to achieve the purpose, the invention is realized by the following technical scheme:
an environment-friendly continuous casting tundish dry material is characterized by being prepared from the following raw materials in parts by weight:
main materials: 10-15 parts of magnesia carbon waste bricks with the granularity of more than 3 and less than or equal to 5mm, 10-15 parts of magnesia carbon waste bricks with the granularity of more than 1 and less than or equal to 3mm, 15-20 parts of magnesia carbon waste bricks with the granularity of more than 0 and less than or equal to 1mm, 5-10 parts of magnesia with the granularity of more than 3 and less than or equal to 5mm, 10-20 parts of magnesia with the granularity of more than 1 and less than or equal to 3mm, 10-25 parts of magnesia with the granularity of more than 0 and less than or equal to 1mm, and 15-25 parts of 200-mesh magnesia;
preparing materials: 2-5 parts of metal aluminum powder with the particle size of 200 meshes, 2-5 parts of metal silicon powder and 2-5 parts of bentonite;
an environment-friendly binding agent: 2-4 parts of industrial glucose, 5-8 parts of water glass and 5-12 parts of sodium citrate.
Further, the environment-friendly continuous casting tundish dry material is prepared from the following raw materials in parts by weight:
main materials: 10-12 parts of magnesia carbon waste bricks with the granularity of more than 3 and less than or equal to 5mm, 10-12 parts of magnesia carbon waste bricks with the granularity of more than 1 and less than or equal to 3mm, 15-18 parts of magnesia carbon waste bricks with the granularity of more than 0 and less than or equal to 1mm, 5-8 parts of magnesia with the granularity of more than 3 and less than or equal to 5mm, 10-15 parts of magnesia with the granularity of more than 1 and less than or equal to 3mm, 10-15 parts of magnesia with the granularity of more than 0 and less than or equal to 1mm, and 15-20 parts of 200-mesh magnesia;
preparing materials: 2-3 parts of metal aluminum powder with the particle size of 200 meshes, 2-3 parts of metal silicon powder and 2-3 parts of bentonite;
an environment-friendly binding agent: 2-4 parts of industrial glucose, 5-6 parts of water glass and 5-6 parts of sodium citrate.
Further, the environment-friendly continuous casting tundish dry material is prepared from the following raw materials in parts by weight:
main materials: 10 parts of magnesia carbon waste bricks with the granularity of more than 3 and less than or equal to 5mm, 10 parts of magnesia carbon waste bricks with the granularity of more than 1 and less than or equal to 3mm, 15 parts of magnesia carbon waste bricks with the granularity of more than 0 and less than or equal to 1mm, 5 parts of magnesia with the granularity of more than 3 and less than or equal to 5mm, 12 parts of magnesia with the granularity of more than 1 and less than or equal to 3mm, 12 parts of magnesia with the granularity of more than 0 and less than or equal to 1mm and 18 parts of 200-mesh magnesia;
preparing materials: 2 parts of metal aluminum powder with the particle size of 200 meshes, 2 parts of metal silicon powder and 2 parts of bentonite;
an environment-friendly binding agent: 2 parts of industrial glucose, 5 parts of water glass and 5 parts of sodium citrate.
In the environment-friendly continuous casting tundish dry material, mgO in magnesia is more than or equal to 96 percent, and SiO in magnesia 2 Not less than 60.32 percent and volume density not less than 3.0g/cm 3 。
The preparation method of the environment-friendly continuous casting tundish dry material specifically comprises the following steps:
1) Crushing the magnesia carbon waste brick in a crusher, and sieving to obtain a powder with the granularity of more than 0 and less than or equal to 1mm, the granularity of more than 1mm and less than or equal to 3mm, and the granularity of more than 3mm and less than or equal to 5mm; deironing the crushed magnesia carbon waste brick particles, and then drying in a rotary kiln for 3-5min at the drying temperature of 200-300 ℃;
2) Preparing the raw materials according to the raw material composition and the weight part of the main material, and uniformly mixing in a mixer;
3) Then adding the ingredients of the metal aluminum powder, the metal silicon powder, the bentonite and the environment-friendly binding agent according to the weight parts, and uniformly mixing.
Compared with the prior art, the invention has the beneficial effects that:
1) The dry material of the invention uses waste magnesia carbon bricks to replace partial magnesia as raw materials, the used waste magnesia carbon bricks are all products with unqualified physical factors such as appearance and the like and products with unqualified non-chemical indexes, and the using effect of the dry material is basically the same as that of the dry vibration material which is manufactured by using magnesia as the main raw material. The CaO contained in the slag-free molten steel plays a role in purifying the molten steel, so that the slag resistance and the scouring resistance of the molten steel are improved. Effectively reduces the cost and the environmental pollution.
2) By adding industrial glucose, water glass and sodium citrate, the materials are cheap and easy to obtain, and the production cost can be effectively reduced, so that the production of products is greatly improved. The materials are premixed, heated and cured, and the low-temperature baking is long in service life and strong in oxidation resistance, so that the production process is simple.
3) The invention adds the metal aluminum powder and the metal silicon powder as the antioxidant, improves the high-temperature strength of the product, and simultaneously adds the bentonite as the medium-temperature burning promoter, improves the medium-temperature and high-temperature strength index of the material.
Detailed Description
The following examples describe the invention in detail. These examples are merely illustrative of the best embodiments of the present invention and do not limit the scope of the invention.
The raw material ratios of examples 1 to 6 are shown in Table 1.
Table 1: formulation of continuous casting tundish magnesium-calcium dry vibration material (unit: weight portion)
| Starting materials | Particle size | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 |
| Waste magnesia carbon brick | 5-3mm | 10 | 12 | 13 | 14 | 15 | 14 |
| Magnesia carbon waste brick | 3-1mm | 11 | 12 | 13 | 15 | 14 | 15 |
| Waste magnesia carbon brick | 1-0mm | 15 | 17 | 16 | 15 | 20 | 19 |
| Magnesite clinker | 5-3mm | 5 | 6 | 7 | 8 | 10 | 9 |
| Magnesite clinker | 3-1mm | 12 | 13 | 14 | 15 | 20 | 19 |
| Magnesite clinker | 1-0mm | 12 | 15 | 14 | 20 | 22 | 25 |
| Magnesite clinker | 200 mesh | 16 | 18 | 20 | 19 | 25 | 24 |
| Metal aluminum powder | 325 mesh screen | 2 | 3 | 4 | 5 | 4 | 5 |
| Metal silicon powder | 325 mesh screen | 2 | 3 | 4 | 4 | 5 | 5 |
| Bentonite clay | Is commercially available | 2 | 3 | 3 | 5 | 5 | 5 |
| Industrial glucose | Is commercially available | 2 | 3 | 3 | 4 | 4 | 4 |
| Water glass | Is commercially available | 5 | 6 | 6 | 8 | 7 | 8 |
| Citric acid sodium salt | Is commercially available | 5 | 8 | 10 | 10 | 12 | 12 |
The preparation method of the environment-friendly continuous casting tundish dry material specifically comprises the following steps:
1) Crushing the magnesia carbon waste brick in a crusher, and sieving to obtain a powder with the granularity of more than 0 and less than or equal to 1mm, the granularity of more than 1mm and less than or equal to 3mm, and the granularity of more than 3mm and less than or equal to 5mm; the crushed magnesia carbon waste brick particles are deironized and then enter a rotary kiln to be dried for 3-5min, and the drying temperature is 200-300 ℃;
2) Preparing the raw materials according to the raw material composition and the weight part of the main material, and uniformly mixing in a mixer;
3) Then adding the ingredients of aluminum powder, silicon powder, bentonite and environment-friendly binder according to the weight parts, and uniformly mixing.
The performance criteria for the tundish dry feeds of examples 1-6 are shown in Table 2.
Table 2:
| index (I) | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 |
| Body density g/cm3 | 4.30 | 4.20 | 4.25 | 4.35 | 4.28 | 4.21 |
| Flexural strength MPa | 3.70 | 3.50 | 3.60 | 3.80 | 3.75 | 3.70 |
| Bulk density after drying | 2.8 | 2.6 | 2.5 | 2.4 | 2.3 | 2.2 |
The tundish dry material provided by the invention adopts waste magnesia-carbon bricks and magnesia as main raw materials, adopts a novel environment-friendly bonding agent, is environment-friendly in the baking process, has the advantages of high strength, convenience in construction, easiness in disintegration, long service life, environmental friendliness and the like, and overcomes the defects of harmful irritant gas generation, environmental pollution, and adverse effects on clean steel and environmental protection requirements in the prior art.
Claims (5)
1. The environment-friendly continuous casting tundish dry material is characterized by being prepared from the following raw materials in parts by weight:
main materials: 10-15 parts of magnesia carbon waste bricks with the granularity of more than 3 and less than or equal to 5mm, 10-15 parts of magnesia carbon waste bricks with the granularity of more than 1 and less than or equal to 3mm, 15-20 parts of magnesia carbon waste bricks with the granularity of more than 0 and less than or equal to 1mm, 5-10 parts of magnesia with the granularity of more than 3 and less than or equal to 5mm, 10-20 parts of magnesia with the granularity of more than 1 and less than or equal to 3mm, 10-25 parts of magnesia with the granularity of more than 0 and less than or equal to 1mm, and 15-25 parts of magnesia with 200 meshes;
preparing materials: 2-5 parts of metal aluminum powder with the particle size of 200 meshes, 2-5 parts of metal silicon powder and 2-5 parts of bentonite;
an environment-friendly binding agent: 2-4 parts of industrial glucose, 5-8 parts of water glass and 5-12 parts of sodium citrate.
2. The environment-friendly continuous casting tundish dry material as claimed in claim 1, wherein the environment-friendly continuous casting tundish dry material is prepared from the following raw materials in parts by weight:
main materials: 10-12 parts of magnesia carbon waste bricks with the granularity of more than 3 and less than or equal to 5mm, 10-12 parts of magnesia carbon waste bricks with the granularity of more than 1 and less than or equal to 3mm, 15-18 parts of magnesia carbon waste bricks with the granularity of more than 0 and less than or equal to 1mm, 5-8 parts of magnesia with the granularity of more than 3 and less than or equal to 5mm, 10-15 parts of magnesia with the granularity of more than 1 and less than or equal to 3mm, 10-15 parts of magnesia with the granularity of more than 0 and less than or equal to 1mm, and 15-20 parts of 200-mesh magnesia;
preparing materials: 2-3 parts of metal aluminum powder with the particle size of 200 meshes, 2-3 parts of metal silicon powder and 2-3 parts of bentonite;
an environment-friendly binding agent: 2-4 parts of industrial glucose, 5-6 parts of water glass and 5-6 parts of sodium citrate.
3. The environment-friendly continuous casting tundish dry material as claimed in claim 2, wherein the environment-friendly continuous casting tundish dry material is prepared from the following raw materials in parts by weight:
main materials: 10 parts of magnesia carbon waste bricks with the granularity of more than 3 and less than or equal to 5mm, 10 parts of magnesia carbon waste bricks with the granularity of more than 1 and less than or equal to 3mm, 15 parts of magnesia carbon waste bricks with the granularity of more than 0 and less than or equal to 1mm, 5 parts of magnesia with the granularity of more than 3 and less than or equal to 5mm, 12 parts of magnesia with the granularity of more than 1 and less than or equal to 3mm, 12 parts of magnesia with the granularity of more than 0 and less than or equal to 1mm, and 18 parts of magnesia with 200 meshes;
preparing materials: 2 parts of metal aluminum powder with the particle size of 200 meshes, 2 parts of metal silicon powder and 2 parts of bentonite;
an environment-friendly binding agent: 2 parts of industrial glucose, 5 parts of water glass and 5 parts of sodium citrate.
4. The environment-friendly continuous casting tundish dry material as claimed in claim 1, wherein in the environment-friendly continuous casting tundish dry material, mgO in magnesia is greater than or equal to 96%, and SiO is greater than or equal to 96% 2 Not less than 60.32 percent and volume density not less than 3.0g/cm 3 。
5. The preparation method of the environment-friendly continuous casting tundish dry material as claimed in claim 1, comprising the following steps:
1) Crushing the magnesia carbon waste bricks in a crusher, and sieving to obtain the magnesia carbon waste bricks with the granularity of more than 0 and less than or equal to 1mm, the granularity of more than 1mm and less than or equal to 3mm, and the granularity of more than 3mm and less than or equal to 5mm; the crushed magnesia carbon waste brick particles are deironized and then enter a rotary kiln to be dried for 3-5min, and the drying temperature is 200-300 ℃;
2) Preparing the raw materials according to the raw material composition and the weight part of the main material, and uniformly mixing in a mixer;
3) Then adding the ingredients of the metal aluminum powder, the metal silicon powder, the bentonite and the environment-friendly binding agent according to the weight parts, and uniformly mixing.
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| 黄德丰: "《耐火材料与洁净钢生产技术》", 31 January 1991, 湖南科学技术出版社, pages: 463 * |
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