CN104529485B - Two-layer compound refractory material and two-layer compound refractory material ditch cover and its manufacture method and application - Google Patents
Two-layer compound refractory material and two-layer compound refractory material ditch cover and its manufacture method and application Download PDFInfo
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- 239000011819 refractory material Substances 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 4
- 150000001875 compounds Chemical class 0.000 title 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 37
- 239000010959 steel Substances 0.000 claims abstract description 37
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000000945 filler Substances 0.000 claims abstract description 33
- 239000002131 composite material Substances 0.000 claims abstract description 29
- 239000000835 fiber Substances 0.000 claims abstract description 25
- 239000004568 cement Substances 0.000 claims abstract description 23
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052742 iron Inorganic materials 0.000 claims abstract description 18
- BKUKXOMYGPYFJJ-UHFFFAOYSA-N 2-ethylsulfanyl-1h-benzimidazole;hydrobromide Chemical compound Br.C1=CC=C2NC(SCC)=NC2=C1 BKUKXOMYGPYFJJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 11
- 239000011324 bead Substances 0.000 claims abstract description 11
- 239000010439 graphite Substances 0.000 claims abstract description 11
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 11
- 239000010451 perlite Substances 0.000 claims abstract description 11
- 235000019362 perlite Nutrition 0.000 claims abstract description 11
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 10
- 229910018626 Al(OH) Inorganic materials 0.000 claims abstract description 10
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000007667 floating Methods 0.000 claims abstract description 10
- 239000002002 slurry Substances 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims description 15
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- -1 calcium magnesium aluminate Chemical class 0.000 claims description 3
- 230000003628 erosive effect Effects 0.000 claims description 3
- 150000004645 aluminates Chemical class 0.000 claims description 2
- 239000010459 dolomite Substances 0.000 claims description 2
- 229910000514 dolomite Inorganic materials 0.000 claims description 2
- 239000010881 fly ash Substances 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 238000005260 corrosion Methods 0.000 claims 1
- 229910052593 corundum Inorganic materials 0.000 claims 1
- 229910001845 yogo sapphire Inorganic materials 0.000 claims 1
- 238000005336 cracking Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004321 preservation Methods 0.000 abstract description 5
- 230000035939 shock Effects 0.000 abstract description 5
- 239000000779 smoke Substances 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 2
- 239000002912 waste gas Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 42
- 239000000203 mixture Substances 0.000 description 9
- 239000000428 dust Substances 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 4
- 239000011449 brick Substances 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 239000002344 surface layer Substances 0.000 description 4
- 239000004567 concrete Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 238000009853 pyrometallurgy Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
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Abstract
本发明提供一种双层复合耐火材料及双层复合耐火材料沟罩与其制造方法和应用。该沟罩包括钢结构外壳、填充于所述钢结构外壳内的主体耐火材料层及设置于钢结构外壳内侧外表面的抗铁水冲刷层；主体耐火材料层由第一填料、钢纤维、水泥、减水剂和水混合后形成的浆料浇注而成，第一填料由陶粒、漂珠及珍珠岩组成；抗铁水冲刷层由第二填料、Al(OH)3微粉、浓磷酸及水混合后固化而成，第二填料由硅酸铝纤维、α-Al2O3微粉及石墨微粉组成。本发明所制备的双层复合耐火材料沟罩的特点为浇筑成型、能有效防止铁水与烟尘对工人的损伤、降低废气对环境的污染、重量轻，强度大、寿命长、耐高温、抗热震性好、不变形、不开裂、不脱落、保温效果好，移吊抖动不破损。The invention provides a double-layer composite refractory material, a double-layer composite refractory material ditch cover, a manufacturing method and an application thereof. The trench cover includes a steel structure shell, a main refractory material layer filled in the steel structure shell, and an anti-hot metal scour layer arranged on the inner and outer surfaces of the steel structure shell; the main refractory material layer is composed of first filler, steel fiber, cement, The slurry formed by mixing water reducer and water is poured. The first filler is composed of ceramsite, floating beads and perlite; the anti-hot metal scour layer is composed of the second filler, Al(OH) 3 micropowder, concentrated phosphoric acid and water. After curing, the second filler is composed of aluminum silicate fiber, α-Al 2 O 3 micropowder and graphite micropowder. The characteristics of the double-layer composite refractory trench cover prepared by the present invention are pouring and molding, which can effectively prevent the damage of molten iron and smoke to workers, reduce the pollution of waste gas to the environment, light weight, high strength, long life, high temperature resistance and heat resistance. Good shock resistance, no deformation, no cracking, no falling off, good heat preservation effect, no damage when moving and shaking.
Description
技术领域technical field
本发明属于冶金领域，尤其涉及一种双层复合耐火材料及双层复合耐火材料沟罩与其制造方法和应用，该沟罩适用于炼铁、炼钢高炉铁水沟沟罩或作为渣沟盖板及收尘罩使用，以及适用于其它火法冶金(如炼铜、炼铅等)领域的高温液态金属放料沟沟罩或作为收尘罩及渣沟盖板使用。The invention belongs to the field of metallurgy, and in particular relates to a double-layer composite refractory material and a double-layer composite refractory trench cover and its manufacturing method and application. The trench cover is suitable for iron-making and steel-making blast furnace ditch cover or as a slag trench cover It is suitable for use as a dust collection cover, and is suitable for high-temperature liquid metal discharge ditch covers in other pyrometallurgy (such as copper smelting, lead smelting, etc.) fields or as a dust collection cover and slag ditch cover.
背景技术Background technique
炼铁厂高炉出铁会产生大量烟雾，出铁口、铁沟等处需要沟罩和盖板进行防尘。目前国内外炼铁高炉铁水沟沟罩或盖板一般采用钢结构框架，内砌耐火砖或比重较大的耐火浇注料(≥2.6t/m3)制成。铁水沟要经常清理，沟罩或盖板在频繁起吊过程中易变形、易受到强烈冲撞。内砌耐火砖整体结构不好，受冲撞时易脱落、易掉砖；高密度浇注耐火材料自重大，强度和刚性也大，并且耐火砖和浇注耐火材料的热膨胀系数与钢结构框架不匹配，使用过程中易开裂、易脱落，从而大大缩短了沟罩的使用寿命。目前国内炼铁厂沟罩和盖板的使用寿命一般半年左右，严重影响了炼铁厂的工作、环境和安全，沟罩和盖板的频繁更换也增加炼铁成本。为了解决上述问题，专利CN202164312U提出了一种采用耐火纤维直接做沟罩内衬的方法，但其与钢结构框架的固定是个难点。Tapping of blast furnaces in ironworks will produce a lot of smoke, and tapholes, iron trenches, etc. need trench covers and cover plates to prevent dust. At present, domestic and foreign iron-making blast furnace iron ditch covers or cover plates are generally made of steel structure frames, built with refractory bricks or refractory castables with a large specific gravity (≥2.6t/m 3 ). The iron gutter needs to be cleaned frequently, and the ditch cover or cover plate is easily deformed and subjected to strong impact during frequent lifting. The overall structure of the internal refractory bricks is not good, and they are easy to fall off and bricks when they are impacted; high-density cast refractory materials are heavy, strong and rigid, and the thermal expansion coefficients of refractory bricks and cast refractory materials do not match the steel structure frame. It is easy to crack and fall off during use, which greatly shortens the service life of the trench cover. At present, the service life of trench covers and cover plates in domestic ironworks is generally about half a year, which seriously affects the work, environment and safety of ironworks. Frequent replacement of trench covers and cover plates also increases the cost of ironmaking. In order to solve the above problems, the patent CN202164312U proposes a method of directly using refractory fiber as the inner lining of the trench cover, but it is difficult to fix it with the steel structure frame.
发明内容Contents of the invention
本发明的目的在于提供一种质轻高强，抗飞溅铁水冲刷的长寿命的双层复合耐火材料及双层复合耐火材料沟罩与其制造方法和应用。该沟罩在现有高炉环境下可正常使用1年以上。The object of the present invention is to provide a long-life double-layer composite refractory material, a double-layer composite refractory material ditch cover, and its manufacturing method and application, which are light in weight, high in strength, and resistant to scour by molten iron splashes. The trench cover can be used normally for more than one year under the existing blast furnace environment.
本发明为解决上述技术问题所采用的方案为:The present invention adopts for solving the problems of the technologies described above:
一种双层复合耐火材料，它包括主体耐火材料及抗铁水冲刷材料；所述主体耐火材料包括第一填料、钢纤维、水泥、减水剂和水，所述第一填料由陶粒、漂珠及珍珠岩组成；所述抗铁水冲刷材料包括第二填料、Al(OH)3微粉及浓磷酸，所述第二填料由硅酸铝纤维、α-Al2O3微粉及石墨微粉组成。A double-layer composite refractory material, which includes a main refractory material and a molten iron erosion-resistant material; the main refractory material includes a first filler, steel fiber, cement, water reducer and water, and the first filler is made of ceramsite, bleach Composed of beads and perlite; the anti-hot metal scour material includes a second filler, Al(OH) 3 micropowder and concentrated phosphoric acid, and the second filler is composed of aluminum silicate fiber, α-Al 2 O 3 micropowder and graphite micropowder.
上述方案中，所述第一填料、钢纤维、水泥、减水剂和水的质量比为1～3：0.01～0.05：1～3：0.01～0.05：0.35～1，所述第一填料中的陶粒、漂珠及珍珠岩的质量比为0.5～1.5：0.5～1.4：0～0.1。In the above scheme, the mass ratio of the first filler, steel fiber, cement, water reducer and water is 1-3:0.01-0.05:1-3:0.01-0.05:0.35-1, and the first filler The mass ratio of ceramsite, floating beads and perlite is 0.5-1.5:0.5-1.4:0-0.1.
上述方案中，所述第二填料、Al(OH)3微粉、浓磷酸及水的质量比为10～40：5～10：5～30：1～20，所述第二填料中的硅酸铝纤维、α-Al2O3微粉及石墨微粉的质量比为0～1：10～40：0～1。In the above scheme, the mass ratio of the second filler, Al(OH) 3 micropowder, concentrated phosphoric acid and water is 10-40:5-10:5-30:1-20, and the silicic acid in the second filler The mass ratio of aluminum fiber, α-Al 2 O 3 fine powder and graphite fine powder is 0-1:10-40:0-1.
一种双层复合耐火材料沟罩，所述沟罩包括钢结构外壳、填充于所述钢结构外壳内的主体耐火材料层以及设置于所述钢结构外壳内侧外表面的抗铁水冲刷层；所述主体耐火材料层由第一填料、钢纤维、水泥、减水剂和水混合后形成的浆料浇注而成，所述第一填料由陶粒、漂珠及珍珠岩组成；所述抗铁水冲刷层由第二填料、Al(OH)3微粉、浓磷酸及水混合后固化而成，所述第二填料由硅酸铝纤维、α-Al2O3微粉及石墨微粉组成。A double-layer composite refractory trench cover, the trench cover includes a steel structure shell, a main refractory material layer filled in the steel structure shell, and an anti-hot metal erosion layer arranged on the inner and outer surfaces of the steel structure shell; The main refractory material layer is poured from the slurry formed by mixing the first filler, steel fiber, cement, water reducer and water. The first filler is composed of ceramsite, floating beads and perlite; the anti-hot metal The scour layer is formed by mixing and solidifying the second filler, Al(OH) 3 fine powder, concentrated phosphoric acid and water, and the second filler is composed of aluminum silicate fiber, α-Al 2 O 3 fine powder and graphite fine powder.
上述方案中，所述主体耐火材料层的厚度为10-15cm，所述抗铁水冲刷层的厚度为2～5mm。In the above solution, the thickness of the main refractory material layer is 10-15 cm, and the thickness of the anti-hot metal scour layer is 2-5 mm.
上述方案中，所述钢结构外壳外侧内表面还连接有多个伞状加强筋。In the above solution, a plurality of umbrella-shaped reinforcing ribs are connected to the outer inner surface of the steel structure shell.
所述的双层复合耐火材料沟罩的制造方法，其特征在于，它包括如下步骤：The manufacturing method of the double-layer composite refractory trench cover is characterized in that it comprises the following steps:
1)提供一个钢结构外壳；1) Provide a steel structure shell;
2)将由第一填料、钢纤维、水泥、减水剂和水混合后形成的浆料浇注至钢结构外壳内，振捣成型从而形成主体耐火材料层；2) pour the slurry formed by mixing the first filler, steel fiber, cement, water reducer and water into the steel structure shell, and vibrate to form the main refractory material layer;
3)初凝后在所述钢结构外壳内侧外表面涂覆抗铁水冲刷层，静置养护7d后160℃烘烤24～48h即得到所述双层复合耐火材料沟罩。3) After the initial setting, the inner and outer surfaces of the steel structure shell are coated with an anti-hot metal scour layer, and after static curing for 7 days, they are baked at 160° C. for 24 to 48 hours to obtain the double-layer composite refractory trench cover.
上述方案中，所述陶粒是指以页岩、粉煤灰或淤泥烧制成的空心陶粒。In the above scheme, the ceramsite refers to hollow ceramsite fired from shale, fly ash or silt.
上述方案中，所述水泥为铝酸盐耐火水泥、低钙铝酸盐耐火水泥、钙镁铝酸盐水泥和白云石耐火水泥中的一种或几种复配使用。In the above solution, the cement is one or more of aluminate refractory cement, low calcium aluminate refractory cement, calcium magnesium aluminate cement and dolomite refractory cement.
所述的双层复合耐火材料在制作火法冶金高炉中的防尘保温构件中的应用。所述防尘保温构件如炼铁、炼钢高炉铁水沟沟罩或渣沟盖板及收尘罩，以及其它火法冶金(如炼铜、炼铅等)领域的高温液态金属放料沟沟罩或收尘罩及渣沟盖板。The application of the double-layer composite refractory material in the manufacture of dust-proof and heat-insulating components in pyrometallurgical blast furnaces. The dust-proof and heat-preserving components are such as iron ditch cover or slag ditch cover plate and dust collection cover of ironmaking and steelmaking blast furnace, as well as high-temperature liquid metal discharge ditch in other pyrometallurgy (such as copper smelting, lead smelting, etc.) Cover or dust collection cover and slag ditch cover.
本发明的有益效果是：本发明所制备的双层复合耐火材料沟罩的特点为浇筑成型、能有效防止铁水与烟尘对工人的损伤、降低废气对环境的污染、重量轻，强度大、寿命长、耐高温、抗热震性好、不变形、不开裂、不脱落、保温效果好，移吊抖动不破损。The beneficial effects of the present invention are: the double-layer composite refractory ditch cover prepared by the present invention is characterized by pouring and molding, can effectively prevent molten iron and smoke from injuring workers, reduce environmental pollution from waste gas, and is light in weight, high in strength and long in service life. Long, high temperature resistance, good thermal shock resistance, no deformation, no cracking, no falling off, good heat preservation effect, no damage when moving and shaking.
附图说明Description of drawings
图1为本发明实施例1提供的双层复合耐火材料沟罩的剖面图。Fig. 1 is a cross-sectional view of a double-layer composite refractory trench cover provided by Example 1 of the present invention.
图2为本发明实施例2提供的双层复合耐火材料沟罩的剖面图。Fig. 2 is a cross-sectional view of a double-layer composite refractory trench cover provided by Example 2 of the present invention.
具体实施方式detailed description
以下结合附图和实施例进一步对本发明进行说明，但本发明的内容不仅仅局限于下面的实施例。The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the content of the present invention is not limited to the following embodiments.
实施例1Example 1
如图1所示，其为本发明实施例提供的一种炼铁高炉铁水沟双层复合耐火材料沟罩。该沟罩包括钢结构外壳1、填充于钢结构外壳1内的主体耐火材料层3以及设置于钢结构外壳1内侧外表面的抗铁水冲刷层4。钢结构外壳1外侧内表面还连接有多个伞状加强筋2。该主体耐火材料层3的厚度为10-15cm，抗铁水冲刷层4的厚度为2～5mm。该沟罩截面为梯形，样品尺寸长5.5m*(底宽2m，顶宽1.5m)*高1.3m。As shown in Fig. 1, it is a double-layer composite refractory trench cover for an iron gutter of an ironmaking blast furnace provided by an embodiment of the present invention. The trench cover includes a steel structure shell 1 , a main refractory material layer 3 filled in the steel structure shell 1 , and an anti-hot metal scour layer 4 arranged on the inner and outer surfaces of the steel structure shell 1 . A plurality of umbrella-shaped reinforcing ribs 2 are also connected to the outer inner surface of the steel structure shell 1 . The thickness of the main refractory material layer 3 is 10-15 cm, and the thickness of the anti-flushing layer 4 is 2-5 mm. The cross section of the ditch cover is trapezoidal, and the sample size is 5.5m long*(bottom width 2m, top width 1.5m)*high 1.3m.
本实施例中主体耐火材料层3的成分为(重量份计)：陶粒1份、漂珠0.67份、珍珠岩0.05份、铝酸钙水泥(CA-50)1.2份、钢纤维0.02份、水0.38份、减水剂0.01份。将轻质耐火浇注料倒入混凝土搅拌机里，加水搅拌均匀，直至浇注料刚好析浆。In this embodiment, the composition of the main refractory material layer 3 is (in parts by weight): 1 part of ceramsite, 0.67 part of floating beads, 0.05 part of perlite, 1.2 parts of calcium aluminate cement (CA-50), 0.02 part of steel fiber, 0.38 part of water, 0.01 part of water reducer. Pour the lightweight refractory castable into the concrete mixer, add water and mix evenly until the castable just segregates.
本实施例中抗铁水冲刷层4的成分为(重量份计)：浓磷酸20份、水8～8.5份、Al(OH)3微粉5份、硅酸铝纤维0.35份、α-Al2O3微粉22份、石墨微粉0.5份。The composition of the anti-hot metal scour layer 4 in this embodiment is (by weight): 20 parts of concentrated phosphoric acid, 8 to 8.5 parts of water, 5 parts of Al(OH) 3 fine powder, 0.35 parts of aluminum silicate fiber, α-Al 2 O 3 micropowder 22 parts, graphite micropowder 0.5 part.
该双层复合耐火材料沟罩的制造方法为：制作带格子骨架的梯形铁外壳壳模，在壳模内侧焊接伞状螺纹钢加强筋；壳模具上直接浇注轻质主体耐火材料层，厚度10～15cm，用振动台夯实至表面均匀出浆；初凝后(约一天)在其上涂覆耐磨抗铁水冲刷层(2～5mm)。静置养护7d后160℃烘烤24～48h，待表面层固化后即可吊装使用。The manufacturing method of the double-layer composite refractory ditch cover is as follows: making a trapezoidal iron shell mold with a lattice skeleton, welding umbrella-shaped threaded steel reinforcing ribs on the inside of the shell mold; directly pouring a light-weight main refractory layer on the shell mold, with a thickness of 10 ~15cm, use a vibrating table to tamp until the surface is evenly grouted; after the initial setting (about one day), coat it with a wear-resistant and anti-washing layer of molten iron (2-5mm). After static curing for 7 days, bake at 160°C for 24-48 hours. After the surface layer is cured, it can be hoisted and used.
此沟罩重量轻(≤1.0t/m3)，强度≥24MPa、寿命长(≥1.5年)、耐高温(1300℃)、抗热震性好、不变形、不开裂(热膨胀系数≤0.011mm/(m·℃))、不脱落、保温效果好(导热系数≤0.23W/m·℃，沟罩背面≤50℃)，移吊抖动不破损。The trench cover is light in weight (≤1.0t/m 3 ), strength ≥24MPa, long life (≥1.5 years), high temperature resistance (1300°C), good thermal shock resistance, no deformation, no cracking (thermal expansion coefficient ≤0.011mm /(m·°C)), no falling off, good heat preservation effect (thermal conductivity ≤0.23W/m·°C, back of trench cover ≤50°C), no damage when moving and shaking.
实施例2Example 2
如图2所示，其为本发明实施例提供的一种炼铁高炉铁水沟双层复合耐火材料沟罩。该双层复合耐火材料沟罩的截面为弧形，尺寸长5.5m*(底宽2m，弧顶半径1m)*高1.3m。As shown in FIG. 2 , it is a double-layer composite refractory trench cover for an iron gutter of an ironmaking blast furnace provided by an embodiment of the present invention. The cross-section of the double-layer composite refractory trench cover is arc-shaped, and the size is 5.5m*(bottom width: 2m, arc top radius: 1m)*height: 1.3m.
本实施例中主体耐火材料层3的成分为(重量份计)：陶粒1.5份、漂珠1份、珍珠岩0.1份、铝酸钙水泥(CA-50)1.5份、钢纤维0.05份、水0.55份、减水剂0.012份。将轻质耐火浇注料倒入混凝土搅拌机里，加水搅拌均匀，直至浇注料刚好析浆。In this embodiment, the composition of the main refractory material layer 3 is (by weight): 1.5 parts of ceramsite, 1 part of floating beads, 0.1 part of perlite, 1.5 parts of calcium aluminate cement (CA-50), 0.05 parts of steel fiber, 0.55 parts of water, 0.012 parts of water reducing agent. Pour the lightweight refractory castable into the concrete mixer, add water and mix evenly until the castable just segregates.
本实施例中抗铁水冲刷层4的成分为(重量份计)：浓磷酸20份、水8～8.5份、Al(OH)3微粉5份、硅酸铝纤维0.35份、α-Al2O3微粉22份、石墨微粉0.5份。The composition of the anti-hot metal scour layer 4 in this embodiment is (by weight): 20 parts of concentrated phosphoric acid, 8 to 8.5 parts of water, 5 parts of Al(OH) 3 fine powder, 0.35 parts of aluminum silicate fiber, α-Al 2 O 3 micropowder 22 parts, graphite micropowder 0.5 part.
该双层复合耐火材料沟罩的制造方法为：制作带格子骨架的弧形铁外壳壳模，在壳模内侧焊接伞状螺纹钢加强筋；壳模具上直接浇注轻质主体耐火材料层，厚度10～15cm，用振动台夯实至表面均匀出浆；初凝后(约一天)在其上涂覆耐磨抗铁水冲刷层(2～5mm)。静置养护7d后160℃烘烤24～48h，待表面层固化后即可吊装使用。The manufacturing method of the double-layer composite refractory trench cover is as follows: making an arc-shaped iron shell mold with a lattice skeleton, welding umbrella-shaped threaded steel reinforcing ribs on the inside of the shell mold; directly pouring a light-weight main refractory material layer on the shell mold, with a thickness of 10-15cm, tamp it with a vibrating table until the surface is evenly grouted; after the initial setting (about one day), coat it with a wear-resistant and anti-washing layer of molten iron (2-5mm). After static curing for 7 days, bake at 160°C for 24-48 hours. After the surface layer is cured, it can be hoisted and used.
此沟罩重量轻(≤1.0t/m3)，强度≥25MPa、寿命长(≥1.5年)、耐高温(1300℃)、抗热震性好、不变形、不开裂(热膨胀系数≤0.012mm/(m·℃))、不脱落、保温效果好(导热系数≤0.24W/m·℃，沟罩背面≤50℃)，移吊抖动不破损。This trench cover is light in weight (≤1.0t/m 3 ), strength ≥25MPa, long life (≥1.5 years), high temperature resistance (1300°C), good thermal shock resistance, no deformation, no cracking (thermal expansion coefficient ≤0.012mm /(m·°C)), no falling off, good heat preservation effect (thermal conductivity ≤0.24W/m·°C, back of trench cover ≤50°C), no damage when moving and shaking.
实施例3Example 3
本发明实施例提供一种炼铁高炉铁水沟双层复合耐火材料沟罩，所述沟罩的截面为长方形，尺寸长5.5m*底宽2m*高0.15m。An embodiment of the present invention provides a double-layer composite refractory ditch cover for an iron ditch of an iron-making blast furnace. The cross-section of the ditch cover is rectangular, and the size is 5.5m long * 2m wide at the bottom * 0.15m high.
本实施例中轻质高强主体层成分为(重量份计)：陶粒1份、漂珠0.67份、珍珠岩0.05份、铝酸钙水泥(CA-50)1.2份、钢纤维0.02份、水0.38份、减水剂0.01份。将轻质耐火浇注料倒入混凝土搅拌机里，加水搅拌均匀，直至浇注料刚好析浆。In this embodiment, the composition of the light and high-strength main body layer is (in parts by weight): 1 part of ceramsite, 0.67 part of floating beads, 0.05 part of perlite, 1.2 parts of calcium aluminate cement (CA-50), 0.02 part of steel fiber, water 0.38 parts, 0.01 parts of water reducing agent. Pour the lightweight refractory castable into the concrete mixer, add water and mix evenly until the castable just segregates.
本实施例中耐磨抗冲刷表面层成分为(重量份计)：磷酸20份、水8～8.5份、Al(OH)3微粉5份、硅酸铝纤维0.35份、α-Al2O3微粉22份、石墨微粉0.5份。The composition of the wear-resistant and anti-scouring surface layer in this embodiment is (in parts by weight): 20 parts of phosphoric acid, 8 to 8.5 parts of water, 5 parts of Al(OH) 3 micropowder, 0.35 parts of aluminum silicate fiber, α-Al 2 O 3 22 parts of fine powder, 0.5 part of graphite fine powder.
该双层复合耐火材料沟罩的制造方法为：制作带格子骨架的铁外壳壳模，在壳模内侧焊接伞状螺纹钢加强筋；壳模具上直接浇注轻质主体耐火材料层，厚度12～15cm，用振动台夯实至表面均匀出浆；初凝后(约一天)在其上涂覆耐磨抗铁水冲刷层(2～3mm)。静置养护7d后160℃烘烤24～48h，待表面层固化后即可吊装使用。The manufacturing method of the double-layer composite refractory ditch cover is as follows: making an iron shell mold with a lattice skeleton, welding umbrella-shaped rebar reinforcement ribs on the inside of the shell mold; directly pouring a light-weight main refractory material layer on the shell mold, with a thickness of 12~ 15cm, use a vibrating table to tamp until the surface is evenly grouted; after the initial setting (about one day), apply a wear-resistant and anti-washing layer (2-3mm) on it. After static curing for 7 days, bake at 160°C for 24-48 hours. After the surface layer is cured, it can be hoisted and used.
此沟罩重量轻(≤1.0t/m3)，强度≥24MPa、寿命长(≥1.5年)、耐高温(1300℃)、抗热震性好、不变形、不开裂(热膨胀系数≤0.011mm/(m·℃))、不脱落、保温效果好(导热系数≤0.23W/m·℃，沟罩背面≤50℃)，移吊抖动不破损。The trench cover is light in weight (≤1.0t/m 3 ), strength ≥24MPa, long life (≥1.5 years), high temperature resistance (1300°C), good thermal shock resistance, no deformation, no cracking (thermal expansion coefficient ≤0.011mm /(m·°C)), no falling off, good heat preservation effect (thermal conductivity ≤0.23W/m·°C, back of trench cover ≤50°C), no damage when moving and shaking.
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